Rapidly assembled fence for elevator maintenance

Abstract

The invention belongs to the technical field of fences, and discloses a quick assembly type fence for elevator maintenance, which comprises a fence main body, the fence main body is designed to be hollow rectangular, a warning board is arranged at the front end of the fence main body, a warning lamp is fixed at the top end of the fence main body, and baffle rods are mounted in the middle of the fence main body in an array manner; a cushion block is fixed to the bottom end of the fence body, negative pressure suction cups are arranged at the lower ends of the two sides of the fence body, a negative pressure mechanism is arranged in the fence body and comprises a sealing pipe and a piston, and the upper ends of the negative pressure suction cups extend into the fence body to be connected with the sealing pipe. According to the rapid assembly type fence for elevator maintenance, the splicing mechanism is arranged to be matched with the splicing grooves in different directions, fence structures of different shapes can be spliced according to requirements, the rapid assembly type fence is suitable for elevator front walkways of different space sizes, and the negative pressure mechanism and the auxiliary supporting mechanism are arranged in a matched mode; and the use stability and the fence reliability of the fence are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fences, in particular to a quick-assembly fence for elevator maintenance. Background Art

[0002] An elevator is a vertical lift powered by an electric motor and equipped with a box-shaped cabin. It is used to carry people or goods in multi-story buildings. To ensure the safety of passengers, elevators need to be maintained and overhauled regularly. People are not allowed to ride during maintenance and overhaul. Fences are needed to isolate the elevator entrance to avoid danger.

[0003] However, there are still some problems when using the existing quick-assembly fences for elevator maintenance: There is a fence device for facilitating elevator maintenance, such as the Chinese patent application number CN202321649236.9, which includes a first baffle and a slot, a slot is provided on one side of the first baffle, a card slot is provided on one side of the slot, a second baffle is provided on one side of the first baffle, an insert block is provided on one side of the second baffle, a storage slot is provided on one side of the insert block, a first spring is provided inside the storage slot, a buckle is provided at one end of the first spring, the buckle and the slot are fixed by snapping, and the slot, the card slot, the card block, the storage slot, the first spring and the buckle are provided; The existing elevator maintenance fence device is only used as a shield, but it cannot be effectively fixed and can be easily removed. In addition, a movable structure is set at the lower end. If it is displaced by collision, it cannot effectively play the role of enclosure. If people take the elevator at this time, it is easy to be dangerous. At the same time, the existing fences cannot be used individually and need to be assembled into a U-shaped structure before they can be stably placed. If the elevator space is small, multiple sets of assembled fences will inevitably block the space in front of the elevator, affecting the normal passage of personnel, and there are certain limitations in their use.

[0004] In view of the above problems, an innovative design was made based on the original quick-assembly fence used for elevator maintenance. Summary of the invention

[0005] The purpose of the present invention is to provide a quick-assembly fence for elevator maintenance, so as to solve the problems raised in the above background technology that the existing elevator maintenance fence cannot be independently fixed to the ground when used, occupies a large space when multiple groups are spliced ​​together, the splicing shape cannot be changed according to needs, the fencing effect is poor, and it is easy to move.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fast-assembly fence for elevator maintenance, comprising a fence body, which is designed in a hollow rectangular shape: A warning sign is arranged at the front end of the fence body, a warning light is fixed at the top of the fence body, a gear lever is installed in an array in the middle of the fence body, a cushion block is fixed at the bottom end of the fence body, and negative pressure suction cups are arranged at the lower ends of both sides of the fence body, a negative pressure mechanism is arranged inside the fence body, and the negative pressure mechanism includes a sealing tube and a piston, and the upper end of the negative pressure suction cup extends to the inside of the fence body and is connected to the sealing tube, and the negative pressure mechanism is used to provide negative pressure for the negative pressure suction cup so that it can be adsorbed to the ground; An auxiliary support mechanism is provided at the rear side of the fence body, and the auxiliary support mechanism includes a support plate and a pad, and the auxiliary support mechanism can further support the fence body to improve the installation stability; A transmission mechanism is provided at the upper end of the fence body, and the transmission mechanism includes a second threaded rod and a transmission shaft, and the second threaded rod passes through the outer portion of the upper end of the fence body, and the transmission mechanism is used to synchronously provide power for the expansion and storage of the auxiliary support mechanism and the negative pressure mechanism; The right side and the rear end of the right side of the fence main body are both provided with splicing grooves, and the left side of the fence main body is provided with a splicing mechanism, which includes a snap-in plate, and the snap-in plate can cooperate with the splicing groove to connect multiple groups of fence main bodies.

[0007] Preferably, fixing buckles are connected to both sides of the rear end of the warning sign, and the rear side of the fixing buckles is fixedly connected to the upper end of the gear lever. Two groups of warning lights are provided, and the warning lights are symmetrically distributed on both sides of the upper end of the fence body.

[0008] By adopting the above technical solution, a double warning is given by setting up warning signs and warning lights, which can remind people to avoid danger.

[0009] Preferably, two groups of the clamping plates are provided, and the clamping plates are distributed in a mirror-like manner front and back, a bidirectional threaded rod is rotatably connected to the middle left side of the fence body, and both ends of the bidirectional threaded rod are respectively threadedly connected to the two groups of clamping plates.

[0010] Preferably, the snap-in plate is designed as an "L"-shaped structure. When the fence body is spliced, the snap-in plate extends to the inside of the splicing groove to form a snap-in structure. Sliding guide rods penetrate the upper and lower ends of the snap-in plate, and the two ends of the sliding guide rods are fixed to the inner wall of the fence body, and the sliding guide rods are slidably connected to the snap-in plate.

[0011] By adopting the above technical solution, the two sets of clamping plates can be driven to move in relative directions by rotating the bidirectional threaded rod, and then after extending to the inside of the splicing groove, they can be engaged with it to fix the two sets of fence bodies. The assembly can be completed quickly and the operation is simple, and the two sets of sliding guide rods can improve the activity stability of the clamping plates.

[0012] Preferably, the upper end of the support plate is connected to a sliding frame, and the sliding frame is slidably connected to the gear lever, the lower end of the support plate is rotatably connected to the pad, a storage groove is opened at the lower front end of the support plate, and a support connecting rod is rotatably connected inside the storage groove, the front end of the support connecting rod is rotatably connected to a fixed seat, and the fixed seat is fixedly connected to the lower end of the gear lever.

[0013] Preferably, the lower end of the second threaded rod passes through the sliding frame, and the lower end of the second threaded rod is threadedly connected to the sliding frame.

[0014] By adopting the above technical solution, through the design of the pad of the support plate, auxiliary support can be provided on the back side when the fence is installed, thereby further improving the installation stability of the fence. At the same time, by utilizing the cooperation of the second threaded rod, it can cooperate with the support connecting rod when it drives the sliding frame to rise and fall, so as to fold and store the support plate.

[0015] Preferably, a piston is slidably connected inside the sealing tube, and a first threaded rod is rotatably connected inside the sealing tube, and the first threaded rod is threadedly connected to the piston.

[0016] Preferably, a rubber gasket is connected to the bottom end of the negative pressure suction cup, the upper end of the first threaded rod extends to the outside of the sealing tube, and a second bevel gear set is connected between the top end of the first threaded rod and the transmission shaft.

[0017] By adopting the above technical solution, the position of the piston can be adjusted through the cooperation of the piston and the sealing tube through the first threaded rod, and then when the piston moves upward, the space below the piston of the sealing tube and the negative pressure suction cup generate suction, thereby stably and reliably adsorbing to the ground, further maintaining the installation stability of the fence body, and the separate setting of the rubber gasket not only improves the sealing performance in contact with the ground, but also improves the convenience of replacement.

[0018] Preferably, a fixed plate is connected to the upper end of the fence body, and the transmission shaft is rotatably connected to the fixed plate, the transmission shaft is symmetrically distributed in two groups on both sides of the fence body, and a first bevel gear set is connected between the second threaded rod and the transmission shaft; The transmission shaft on the right side passes through the outside of the fence body, and a splicing rod is fixed to the right end of the right transmission shaft, and the splicing rod is a directional structural design. The left end of the transmission shaft on the left side is connected to a first splicing sleeve, and the first splicing sleeve and the splicing rod form a snap-fit ​​structure, which facilitates the transmission mechanism to maintain linkage after multiple groups of fence bodies are spliced.

[0019] By adopting the above technical solution, the second threaded rod can be rotated to provide power for the storage and deployment of the auxiliary support structure. At the same time, the cooperation of the first bevel gear group, the transmission shaft, and the second bevel gear group can be utilized to provide power for the negative pressure mechanism. The first splicing sleeve and the splicing rod connected at both ends of the two sets of transmission shafts can facilitate the splicing of multiple sets of fence bodies, and their internal transmission mechanisms can be synchronously transmitted, thereby improving operational convenience.

[0020] Preferably, a second splicing sleeve is rotatably connected to both sides of the rear end of the fence body, and a third bevel gear set is connected between the front end of the second splicing sleeve and the transmission shaft. The second splicing sleeve is used to connect to the splicing rod when the fence body is spliced ​​at a vertical angle.

[0021] By adopting the above technical solution, through the cooperation of the third bevel gear set and the second splicing sleeve, it is possible to facilitate the synchronous transmission between the transmission mechanisms when the fence main body is connected in the vertical direction.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the quick-assembly fence for elevator maintenance, by providing a splicing mechanism in cooperation with splicing grooves in different directions, can be used to splice fence structures of different shapes according to needs, and is suitable for elevator front walkways of different space sizes. In addition, a negative pressure mechanism and an auxiliary support mechanism are provided to improve the stability of the fence during use and the reliability of the enclosure.

[0023] 1. Through the cooperation of the negative pressure mechanism and the negative pressure suction cup, the enclosure body can be adsorbed to the ground by negative pressure, and an independent set of fence bodies can also be effectively fixed, which improves the convenience and scope of use. In addition, the fence is difficult to move after being adsorbed to the ground, which further improves the reliability of enclosure isolation during elevator maintenance and improves safety; 2. By setting up an auxiliary support mechanism, the fence body can be supported. The fence body, the auxiliary support mechanism and the ground form a triangle, which has reliable support and can resist collision, thus preventing the fence structure from collided or hit and falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front structural schematic diagram of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the independent structure of the fence main body of the present invention; Figure 4 It is a schematic diagram of the structure of the first bevel gear set and the second threaded rod of the present invention; Figure 5 This is a schematic diagram of the side section structure of the fence body of the present invention; Figure 6 It is a schematic diagram of the structure of the piston and the first threaded rod of the present invention; Figure 7 It is a schematic diagram of the structure of the clamping plate and the bidirectional threaded rod of the present invention; Figure 8 It is a schematic diagram of the structure of the sliding guide rod and the clamping plate of the present invention; Fig. 9 This is a schematic diagram of the support plate and pad structure of the present invention; Fig.10 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0025] In the figure: 1. fence body; 2. warning sign; 3. fixing buckle; 4. warning light; 5. cushion block; 6. negative pressure suction cup; 7. sealing tube; 8. piston; 9. first threaded rod; 10. rubber gasket; 11. gear lever; 12. sliding frame; 13. support plate; 14. cushion plate; 15. storage groove; 16. fixing seat; 17. supporting connecting rod; 18. second threaded rod; 19. fixing plate; 20. transmission shaft; 21. first bevel gear set; 22. first splicing sleeve; 23. splicing rod; 24. second bevel gear set; 25. third bevel gear set; 26. second splicing sleeve; 27. splicing groove; 28. clamping plate; 29. ​​two-way threaded rod; 30. sliding guide rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-10 The present invention provides a technical solution: a quick-assembly fence for elevator maintenance, comprising a fence main body 1, the fence main body 1 is designed as a hollow rectangular shape, a warning sign 2 is arranged at the front end of the fence main body 1, and a warning light 4 is fixed at the top of the fence main body 1, and a gear bar 11 is installed in an array in the middle of the fence main body 1, a cushion block 5 is fixed at the bottom end of the fence main body 1, fixed buckles 3 are connected to both sides of the rear end of the warning sign 2, and the rear side of the fixed buckle 3 is fixedly connected to the upper end of the gear bar 11, two groups of warning lights 4 are arranged, and the warning lights 4 are symmetrically distributed on both sides of the upper end of the fence main body 1; a complete fence structure is formed by multiple groups of gear bars 11 and the fence main body 1, and the warning sign 2 is installed at the front end of the gear bar 11 by using the fixed buckle 3, and the warning light 4 installed at the upper end of the fence main body 1 has a double warning effect, and the shielding of the fence can avoid danger when using the elevator during maintenance.

[0028] A splicing groove 27 is provided on the right side and the rear end of the right side of the fence main body 1, and a splicing mechanism is provided inside the left side of the fence main body 1, and the splicing mechanism includes a clamping plate 28, and the clamping plate 28 can cooperate with the splicing groove 27 to connect multiple groups of fence main bodies 1; two groups of clamping plates 28 are provided, and the clamping plates 28 are distributed in a mirror image front and back, and a bidirectional threaded rod 29 is rotatably connected to the middle part of the left side of the fence main body 1, and the two ends of the bidirectional threaded rod 29 are respectively threadedly connected to the two groups of clamping plates 28; the clamping plate 28 is designed in an "L" shape. When the fence main body 1 is spliced, the clamping plate 28 extends to the inside of the splicing groove 27 to form a clamping structure, and the clamping plate 28 is connected to the fence main body 1. Sliding guide rods 30 pass through the upper and lower ends of the connecting plate 28, and the two ends of the sliding guide rods 30 are fixed to the inner wall of the fence main body 1, and the sliding guide rods 30 are slidably connected to the clamping plate 28; the setting of two groups of splicing grooves 27 facilitates the splicing and installation of the fence main body 1 at different angles, and multiple groups of fence main bodies 1 can be spliced ​​into different shapes according to needs. When in use, first make the two groups of fence main bodies 1 fit together and then extend the clamping plate 28 into the inside of the splicing groove 27, and rotate the two-way threaded rod 29 to drive the two groups of clamping plates 28 to move in different directions, and then engage with the inner wall of the splicing groove 27 to fix the relative positions of the two groups of fence main bodies 1.

[0029] Negative pressure suction cups 6 are arranged at the lower ends of both sides of the fence body 1, a negative pressure mechanism is arranged inside the fence body 1, and the negative pressure mechanism includes a sealing tube 7 and a piston 8, and the upper end of the negative pressure suction cup 6 extends to the inside of the fence body 1 and is connected to the sealing tube 7, and the negative pressure mechanism is used to provide negative pressure for the negative pressure suction cup 6 to facilitate its adsorption to the ground; the sealing tube 7 is slidably connected to the piston 8, and the sealing tube 7 is rotatably connected to the first threaded rod 9, and the first threaded rod 9 is threadedly connected to the piston 8; the bottom end of the negative pressure suction cup 6 is connected to a rubber gasket 10, the upper end of the first threaded rod 9 extends to the outside of the sealing tube 7, and the first threaded rod A second bevel gear set 24 is connected between the top of 9 and the transmission shaft 20; through the cooperation of the sealing tube 7, the piston 8 and the negative pressure suction cup 6, the fence body 1 can be fixed by adsorption with the ground, and the first threaded rod 9 is used to drive the piston 8 to move upward inside the sealing tube 7. The space of the sealing tube 7 below the piston 8 and the inside of the negative pressure suction cup 6 are both in a negative pressure state, so that the lower end of the negative pressure suction cup 6 generates suction and then adsorbs with the ground, thereby fixing the fence body 1, and the design of the independent rubber gasket 10 can improve the sealing effect between the negative pressure suction cup 6 and the ground, thereby improving the reliability of negative pressure adsorption.

[0030] An auxiliary support mechanism is arranged on the rear side of the fence body 1, and the auxiliary support mechanism includes a support plate 13 and a pad 14, and the auxiliary support mechanism can further support the fence body 1 to improve the installation stability; the upper end of the support plate 13 is connected to a sliding frame 12, and the sliding frame 12 is slidably connected to the gear lever 11, and the lower end of the support plate 13 is rotatably connected to the pad 14, and a storage groove 15 is provided at the lower end of the front side of the support plate 13, and a support connecting rod 17 is rotatably connected inside the storage groove 15, and a fixed seat 16 is rotatably connected to the front end of the support connecting rod 17, and the fixed seat 16 is fixedly connected to the lower end of the gear lever 11; the lower end of the second threaded rod 18 passes through the sliding frame 12, and the lower end of the second threaded rod 18 is threadedly connected to the sliding frame 12; the height of the sliding frame 12 can be adjusted by the second threaded rod 18, and when the sliding frame When 12 moves downward, the support link 17 can be used to push the lower end of the support plate 13 to rotate around the sliding frame 12, and the pad 14 can be in contact with the ground during the continuous movement. The support plate 13, the fence main body 1 and the ground are in a triangular state, which can effectively support the fence main body 1 and have a certain anti-collision function to prevent the fence from tipping over and losing its enclosure effect due to collisions. At the same time, the auxiliary support can be stored when the sliding frame 12 rises, and the support link 17 can be used to pull the support plate 13 to rotate in the opposite direction during the rising process, and the support plate 13 can be rotated to an upright state during the continuous rising process, and the support link 17 can move to the inside of the storage groove 15, and the pad 14 moves with the support plate 13, and is pushed to fold into an upright state after contacting the support link 17.

[0031] A transmission mechanism is provided at the upper end of the fence body 1, and the transmission mechanism includes a second threaded rod 18 and a transmission shaft 20, and the second threaded rod 18 passes through the outer upper end of the fence body 1, and the transmission mechanism is used to synchronously provide power for the unfolding and storage of the auxiliary support mechanism and the negative pressure mechanism; a fixed plate 19 is connected to the upper end of the fence body 1, and the transmission shaft 20 is rotatably connected to the fixed plate 19, and the transmission shaft 20 is symmetrically distributed in two groups on both sides of the fence body 1, and a first bevel gear set 21 is connected between the second threaded rod 18 and the transmission shaft 20, the right side transmission shaft 20 passes through the outside of the fence body 1, and a splicing rod 23 is fixed to the right side end of the right side transmission shaft 20, and the splicing rod 23 is a directional structural design, and the left end of the left side transmission shaft 20 is connected to the first splicing sleeve 22, and the first splicing sleeve 22 and the splicing rod 23 form a snap-fit ​​structure, so that the transmission mechanism can maintain linkage after multiple groups of fence bodies 1 are spliced; second splicing sleeves 26 are rotatably connected to both sides of the rear end of the fence body 1, and the front end of the second splicing sleeve 26 is connected to the transmission shaft 2 0 is connected with a third bevel gear set 25, and the second splicing sleeve 26 is used to connect with the splicing rod 23 when the fence main body 1 is spliced ​​at a vertical angle; the transmission mechanism can synchronously provide power for the auxiliary support mechanism and the negative pressure mechanism, and when the second threaded rod 18 is rotated, the sliding frame 12 can be driven to rise and fall. At the same time, the second threaded rod 18 uses the first bevel gear set 21 to drive the two sets of transmission shafts 20 to rotate, and when the transmission shaft 20 rotates, the first threaded rod 9 is driven to rotate through the second bevel gear set 24 to provide power for the lifting and lowering of the piston 8, so that the negative pressure adsorption mechanism and the auxiliary support mechanism are linked to each other, and the operation is simple and convenient. At the same time, the first splicing sleeves 22 and the splicing rod 23 set at both ends of the fence main body 1 are respectively connected with the two sets of transmission shafts 20. When the fence main body 1 is spliced, the first splicing sleeve 22 and the splicing rod 23 can be used to engage with each other to make multiple sets of transmission mechanisms connected to each other, reducing the cumbersomeness of operation, and the second splicing sleeve 26 and the third bevel gear set 25 are set to facilitate the transmission when the two sets of fence main bodies 1 are spliced ​​in the vertical direction.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the present invention have been shown and described, it is understood by ordinary technicians in the field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fast-assembly fence for elevator maintenance, comprising a fence body (1), the fence body (1) being designed in a hollow rectangular shape, characterized in that: A warning sign (2) is arranged at the front end of the fence body (1), a warning light (4) is fixed at the top of the fence body (1), and a gear lever (11) is installed in an array in the middle of the fence body (1), a cushion block (5) is fixed at the bottom end of the fence body (1), and negative pressure suction cups (6) are arranged at the lower ends of both sides of the fence body (1), a negative pressure mechanism is arranged inside the fence body (1), and the negative pressure mechanism includes a sealing tube (7) and a piston (8), and the upper end of the negative pressure suction cup (6) extends to the inside of the fence body (1) and is connected to the sealing tube (7), and the negative pressure mechanism is used to provide negative pressure for the negative pressure suction cup (6) so that it can be adsorbed to the ground; An auxiliary support mechanism is arranged on the rear side of the fence body (1), and the auxiliary support mechanism comprises a support plate (13) and a pad (14), and the auxiliary support mechanism can further support the fence body (1) to improve installation stability; A transmission mechanism is provided at the upper end of the fence body (1), and the transmission mechanism comprises a second threaded rod (18) and a transmission shaft (20), and the second threaded rod (18) passes through the outer portion of the upper end of the fence body (1), and the transmission mechanism is used to synchronously provide power for the expansion and storage of the auxiliary support mechanism and the negative pressure mechanism; The right side and the rear end of the right side of the fence main body (1) are both provided with a splicing groove (27), and the left side of the fence main body (1) is provided with a splicing mechanism, which includes a clamping plate (28), and the clamping plate (28) can cooperate with the splicing groove (27) to connect multiple groups of fence main bodies (1).

2. The fast-assembly fence for elevator maintenance according to claim 1, characterized in that: The warning sign (2) is connected to fixing buckles (3) on both sides of the rear end, and the rear side of the fixing buckles (3) is fixedly connected to the upper end of the gear lever (11). Two groups of warning lights (4) are provided, and the warning lights (4) are symmetrically distributed on both sides of the upper end of the fence body (1).

3. The fast-assembly fence for elevator maintenance according to claim 2, characterized in that: Two groups of the clamping plates (28) are provided, and the clamping plates (28) are distributed in a mirror image at the front and rear. A bidirectional threaded rod (29) is rotatably connected to the middle of the left side of the fence body (1), and both ends of the bidirectional threaded rod (29) are respectively threadedly connected to the two groups of clamping plates (28).

4. The fast-assembly fence for elevator maintenance according to claim 3, characterized in that: The snap-in plate (28) is designed to be an "L"-shaped structure. When the fence body (1) is spliced, the snap-in plate (28) extends to the inside of the splicing groove (27) to form a snap-in structure. The upper and lower ends of the snap-in plate (28) are penetrated by sliding guide rods (30), and the two ends of the sliding guide rods (30) are fixed to the inner wall of the fence body (1), and the sliding guide rods (30) are slidably connected to the snap-in plate (28).

5. The fast-assembly fence for elevator maintenance according to claim 1, characterized in that: The upper end of the support plate (13) is connected to a sliding frame (12), and the sliding frame (12) is slidably connected to the shift rod (11); the lower end of the support plate (13) is rotatably connected to the pad (14); a storage groove (15) is provided at the lower end of the front side of the support plate (13), and a support connecting rod (17) is rotatably connected inside the storage groove (15); the front end of the support connecting rod (17) is rotatably connected to a fixed seat (16), and the fixed seat (16) is fixedly connected to the lower end of the shift rod (11).

6. The fast-assembly fence for elevator maintenance according to claim 5, characterized in that: The lower end of the second threaded rod (18) passes through the sliding frame (12), and the lower end of the second threaded rod (18) is threadedly connected to the sliding frame (12).

7. The fast-assembly fence for elevator maintenance according to claim 1, characterized in that: The sealing tube (7) is slidably connected to a piston (8) inside, and a first threaded rod (9) is rotatably connected to the inside of the sealing tube (7), and the first threaded rod (9) is threadedly connected to the piston (8).

8. The fast-assembly fence for elevator maintenance according to claim 7, characterized in that: The bottom end of the negative pressure suction cup (6) is connected to a rubber gasket (10), the upper end of the first threaded rod (9) extends to the outside of the sealing tube (7), and a second bevel gear set (24) is connected between the top end of the first threaded rod (9) and the transmission shaft (20).

9. The fast-assembly fence for elevator maintenance according to claim 1, characterized in that: A fixing plate (19) is connected to the upper end of the fence body (1), and a transmission shaft (20) is rotatably connected to the fixing plate (19). Two groups of transmission shafts (20) are symmetrically distributed on both sides of the fence body (1), and a first bevel gear set (21) is connected between the second threaded rod (18) and the transmission shaft (20); The transmission shaft (20) on the right side passes through the outside of the fence body (1), and a splicing rod (23) is fixed to the right end of the transmission shaft (20) on the right side, and the splicing rod (23) is of directional structural design. The left end of the transmission shaft (20) on the left side is connected to a first splicing sleeve (22), and the first splicing sleeve (22) and the splicing rod (23) form a snap-fit ​​structure, so that the transmission mechanism can maintain linkage after multiple groups of fence bodies (1) are spliced.

10. The fast-assembly fence for elevator maintenance according to claim 9, characterized in that: The fence body (1) is rotatably connected to second splicing sleeves (26) on both sides of the rear end, and a third bevel gear set (25) is connected between the front end of the second splicing sleeve (26) and the transmission shaft (20). The second splicing sleeve (26) is used to connect to the splicing rod (23) when the fence body (1) is spliced ​​at a vertical angle.

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