An anti-tipping insulated ladder

Abstract

This invention discloses an anti-tipping insulated ladder, comprising an insulated ladder body and two upper positioning mechanisms. The insulated ladder body includes two parallel main beams, each with a fixing groove on its outer wall on the side furthest from each other. The upper positioning mechanisms are located inside the fixing grooves. Each upper positioning mechanism includes a mounting plate, an adjusting plate, and a positioning component. The mounting plates of the two upper positioning mechanisms are respectively located within the fixing grooves and hinged to the main beams. One outer wall of the mounting plate is rotatably connected to the adjusting plate, and the positioning component is assembled with the adjusting plate. The beneficial effects of this invention are: by providing fixing grooves on the main beams of the insulated ladder body and installing upper positioning mechanisms within these grooves, the upper positioning mechanisms can carve out the fixing grooves through hinges. Subsequently, rotating the adjusting plate facilitates adjustment of the positioning component's operating angle, ensuring that when the insulated ladder body is against a wall, the adjusting plate is parallel to the wall, thus facilitating the fixing of the positioning component to the wall.

Description

Technical Field

[0001] This invention relates to the field of maintenance equipment technology, specifically to an anti-tipping insulated ladder. Background Technology

[0002] Substation operation involves the transfer of electrical energy through transformers. A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). Substation maintenance workers are responsible for inspecting, replacing, debugging, and maintaining circuit breakers and disconnect switches, as well as repairing transformers, instrument transformers, and other substation equipment to ensure their safety and quality. Insulated ladders are frequently used in substation maintenance work.

[0003] In existing technologies, the insulated ladders used in traditional substation maintenance operations are generally of the straight type. However, since most straight insulated ladders lack anti-tipping measures, they are prone to tipping over when used on site due to excessive tilt angle between the placement position and the ground. This can cause workers to fall from the straight insulated ladder during work, resulting in personal injury. At the same time, the insulated ladders have poor stability. When workers operate them too vigorously, the insulated ladders can easily sway in all directions, posing a safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an anti-tipping insulated ladder, thereby solving the problem that insulated ladders are prone to tipping over during use.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an anti-tipping insulated ladder, comprising an insulated ladder body and two upper positioning mechanisms;

[0006] The insulated ladder body includes two parallel main beams, and a fixing groove is provided on the outer wall of the side of the two main beams that are far apart from each other; the upper positioning mechanism is located inside the fixing groove.

[0007] The upper positioning mechanism includes a mounting plate, an adjusting plate, and a positioning component; the mounting plates of the two upper positioning mechanisms are respectively disposed in the fixing groove and hinged to the main beam; one outer wall of the mounting plate is rotatably connected to the adjusting plate, and the positioning component is assembled and connected to the adjusting plate.

[0008] The beneficial effects of this invention are as follows: It provides an anti-tipping insulated ladder by setting a fixing groove on the main beam of the insulated ladder body and setting an upper positioning mechanism in the fixing groove. The upper positioning mechanism can be hinged to make the fixing groove, and then the adjustment plate can be rotated to facilitate the adjustment of the use angle of the positioning component. When the insulated ladder body is against the wall, the adjustment plate is parallel to the wall, which facilitates the fixing of the positioning component to the wall. This positions the upper part of the insulated ladder body and prevents it from tipping over due to poor stability of the upper part of the insulated ladder during use, thereby improving the safety of maintenance personnel when using the insulated ladder. Attached Figure Description

[0009] Figure 1 This is a perspective view of the present invention;

[0010] Figure 2 This is a cross-sectional view of the present invention;

[0011] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0012] Figure 4 This is a perspective view of the invention in use;

[0013] Figure 5 For the present invention Figure 4 Central 3D view;

[0014] Figure 6 In this invention Figure 5 A sectional view;

[0015] Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle;

[0016] Figure 8 For the present invention Figure 4 Central 3D view;

[0017] Figure 9 For the present invention Figure 4 Enlarged view of point B in the middle;

[0018] Label Explanation:

[0019] 1. Insulated ladder body; 101. Main beam; 102. Crossbeam;

[0020] 2. Upper positioning mechanism; 201. Mounting shaft; 202. Mounting plate; 203. Mounting column; 204. Adjusting plate;

[0021] 3. Lower positioning mechanism; 301. Fixed shaft; 302. Rotating plate; 303. Anti-slip teeth;

[0022] 4. Positioning components; 401. Mounting tube; 402. Suction cup; 403. Fixing plate; 404. Push-pull rod; 405. Limiting plate; 406. Rubber piston;

[0023] 5. Positioning ring; 6. Push-pull handle; 7. Connecting plate; 8. Abutment plate; 9. Limiting block; 10. Pulling block; 11. Elastic locking block; 12. Anti-slip convex strip; 13. Anti-slip block. Detailed Implementation

[0024] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Please refer to Figure 1 as well as Figure 2 An anti-tipping insulated ladder includes an insulated ladder body and two upper positioning mechanisms;

[0026] The insulated ladder body includes two parallel main beams, and a fixing groove is provided on the outer wall of the side of the two main beams that are far apart from each other; the upper positioning mechanism is located inside the fixing groove.

[0027] The upper positioning mechanism includes a mounting plate, an adjusting plate, and a positioning component; the mounting plates of the two upper positioning mechanisms are respectively disposed in the fixing groove and hinged to the main beam; one outer wall of the mounting plate is rotatably connected to the adjusting plate, and the positioning component is assembled and connected to the adjusting plate.

[0028] As can be seen from the above description, the beneficial effects of the present invention are as follows: It provides an anti-tipping insulated ladder by setting a fixing groove on the main beam of the insulated ladder body and setting an upper positioning mechanism in the fixing groove. The upper positioning mechanism can be hinged to make the fixing groove, and then the adjustment plate can be rotated to facilitate the adjustment of the use angle of the positioning component. When the insulated ladder body is against the wall, the adjustment plate is parallel to the wall, which facilitates the fixing of the positioning component to the wall. This positions the upper part of the insulated ladder body, preventing it from tipping over due to poor stability of the upper part of the insulated ladder during use, and improving the safety of maintenance personnel when using the insulated ladder.

[0029] Preferably, the upper positioning mechanism further includes a mounting shaft, which is rotatably embedded in the fixing groove, and the mounting plate is fixedly sleeved on the outer surface of the mounting shaft.

[0030] In an embodiment of the present invention, the positioning component includes an installation tube and a suction cup, the installation tube being threadedly connected to the adjustment plate, and a suction cup being provided at one end of the installation tube.

[0031] As can be seen from the above description, in order to achieve the positioning effect, especially in the process of substation maintenance, the positioning component is equipped with an installation tube and a suction cup. During use, the adjustment plate is parallel to the wall, and the installation tube is perpendicular to the wall. Rotating the fixing plate facilitates the movement of the installation tube inside the threaded hole on the adjustment plate, which in turn facilitates the suction cup at one end of the installation tube to abut against the wall, making it easy to position the installation tube, adjustment plate, and installation plate on the wall to position the upper part of the insulated ladder body.

[0032] In an embodiment of the present invention, the positioning assembly further includes a fixing plate, a push-pull rod, two limiting plates, and a rubber piston;

[0033] The fixing plate is located at the other end of the mounting tube. The push-pull rod is slidably embedded in the outer wall of the fixing plate. Two limiting plates are provided at one end of the push-pull rod located inside the mounting tube. The two limiting plates are arranged at a preset interval. The rubber piston is fixedly located between the two limiting plates.

[0034] As described above, an air pressure control structure is installed inside the mounting tube. Specifically, a pressure chamber is formed between the push-pull rod slidably embedded in the fixed plate and the rubber piston at the end of the push-pull rod and the mounting cylinder. During the movement of the rubber piston, air is injected or extracted into the suction cup, which facilitates the suction cup's adhesion to the wall and disassembly. At the same time, the limiting plate facilitates the positioning and installation of the rubber piston, preventing it from falling off and improving the safety of the positioning component.

[0035] Furthermore, the end of the mounting tube near the suction cup has a positioning ring on its inner wall, and the positioning ring can press against the limiting plate.

[0036] As can be seen from the above description, in order to prevent the rubber piston from moving beyond the mounting tube, a positioning ring is set inside the mounting tube near the suction cup. The positioning ring can prevent the rubber piston from detaching from the inside of the mounting tube, thereby further improving the safety of the positioning component.

[0037] Furthermore, the push-pull rod has a push-pull handle at one end located outside the mounting tube, and the push-pull handle has an anti-slip structure.

[0038] As can be seen from the above description, in order to facilitate the use of the push-pull rod, a push-pull handle is provided on the push-pull rod. Preferably, a groove is provided on the fixing plate to facilitate the placement of the operator's hands. At the same time, an anti-slip structure is provided on the push-pull handle to improve the ease of operation.

[0039] In an embodiment of the present invention, the upper positioning mechanism further includes a connecting plate, an abutment plate, and a lever;

[0040] The connecting plate is disposed between the two main beams, and the connecting plate is provided with a sliding groove that passes through the main beam. The position of the sliding groove matches the position of the mounting plate.

[0041] The abutment plate is slidably embedded in the sliding groove, and when the abutment plate extends out of the sliding groove, it can support the fixed plate;

[0042] The push block is located at the end of the abutment plate away from the main beam, and the push block can press against the main beam.

[0043] As described above, in order to position the mounting plate in the upper positioning structure and prevent it from loosening during use, a connecting plate and an abutment plate slidably disposed in the sliding groove of the connecting plate are provided. When the abutment plate slides out from the main beam along the sliding groove, the abutment plate supports the mounting plate, making the mounting plate perpendicular to the main beam, thereby facilitating the use of the entire upper positioning mechanism. At the same time, a lever is provided at the end of the abutment plate away from the main beam, which facilitates the movement of the abutment plate by the operator. The lever can also press against the main beam to prevent the abutment plate from slipping off the sliding groove. After the operation is completed, the abutment plate retracts into the sliding groove, making it easy to retract the mounting plate, adjusting plate, and positioning components into the fixed groove. Preferably, each sliding groove has a limit groove on both sides of its inner wall, and each abutment plate has a limit block fixedly connected to both sides of its outer wall to guide the abutment plate.

[0044] In an embodiment of the present invention, the bottom of the fixing groove is provided with a notch, and an elastic block is provided in the notch, the elastic block being used to fix the positioning component.

[0045] As can be seen from the above description, in order to store and fix the upper positioning component, a notch containing an elastic block is provided at the bottom of the fixing groove. The elastic block is used to fix the positioning component, thereby completing the storage of the upper positioning component.

[0046] In an embodiment of the present invention, anti-slip blocks are provided on the top of both main beams.

[0047] As can be seen from the above description, in order to improve the stability of the insulator, anti-slip blocks are installed on the top of the main beam to assist the positioning mechanism in positioning.

[0048] In an embodiment of the present invention, two lower positioning mechanisms are further included; each lower positioning mechanism includes a fixed shaft and a rotating plate, the fixed shafts of the two lower positioning mechanisms are respectively symmetrically arranged at the bottom of the two main beams, the rotating plate is hinged to the main beam through the fixed shaft, and the bottom of the rotating plate is provided with anti-slip teeth.

[0049] As can be seen from the above description, in order to reduce the load on the upper positioning mechanism, a lower positioning mechanism is also provided at the bottom of the main beam. The anti-slip teeth on the rotating plate in the lower positioning mechanism increase the static friction, thereby reducing the component force caused by gravity on the upper positioning mechanism.

[0050] Please refer to Figures 1-9 Embodiment 1 of the present invention is as follows:

[0051] A variable anti-tipping insulated ladder includes;

[0052] The insulated ladder body 1 is composed of two main beams 101 and multiple crossbeams 102. Each main beam 101 has a fixing groove on one side of its outer wall. Each crossbeam 102 has an anti-slip protrusion 12 fixedly connected to one side of its outer wall. Each main beam 101 has an anti-slip block 13 fixedly connected to its top.

[0053] In this embodiment, the insulated ladder body 1 adopts a straight structure. The insulated ladder body 1 is used for substation maintenance work. The anti-slip block 13 on the top of the main beam 101 is used to abut against the wall or utility pole wall at the maintenance work site, which can prevent the insulated ladder body 1 from slipping at the abutment point and improve the anti-slip effect of the insulated ladder body 1. The anti-slip protrusion 12 improves the anti-slip effect of the crossbeam 102 and prevents workers from slipping when standing on the surface of the crossbeam 102, thereby improving the safety of the insulated ladder body 1.

[0054] Please refer to Figure 1 , Figures 5-7 Embodiment 2 of the present invention is based on Embodiment 1:

[0055] It also includes two upper positioning mechanisms 2, each including a mounting shaft 201. The mounting shafts 201 of the two upper positioning mechanisms are rotatably embedded in the inner walls of the corresponding fixing grooves on both sides. Each mounting shaft 201 has a mounting plate 202 fixedly sleeved on its outer surface. Each mounting plate 202 has a mounting post 203 fixedly connected to one side of its outer wall. One end of each mounting post 203 is rotatably connected to an adjusting plate 204. Each adjusting plate 204 has a threaded hole, and a positioning component 4 is installed inside each threaded hole. Each positioning component 4 includes a mounting tube 401, and each mounting tube 401 is threadedly embedded in the corresponding threaded hole. One end of each tube 401 is connected to a suction cup 402. One end of each mounting tube 401 is fixedly connected to a fixing plate 403. Multiple grooves are provided on one side of the outer wall of each fixing plate 403. A push-pull rod 404 is slidably embedded on one side of the outer wall of each fixing plate 403. Two limiting plates 405 are fixedly sleeved on the outer surface of each push-pull rod 404. A rubber piston 406 is fixedly connected between the outer walls of the two limiting plates 405. A positioning ring 5 is fixedly connected to the inner wall of each mounting tube 401. A push-pull handle 6 is fixedly connected to one end of each push-pull rod 404. Multiple anti-slip grooves are provided at equal intervals on the outer surface of each push-pull handle 6.

[0056] In this embodiment, the mounting shaft 201 inside the fixing groove rotates, facilitating the removal of the mounting plate 202, mounting column 203, and adjusting plate 204 from the fixing groove, thereby facilitating the use of the positioning component 4. The mounting column 203 connects the mounting plate 202 and the adjusting plate 204, allowing the adjusting plate 204 to rotate, thus facilitating the adjustment of the angle of use of the positioning component 4. When the insulated ladder body 1 is against the wall, the adjusting plate 204 will be parallel to the wall, and the mounting tube 401 will be perpendicular to the wall. Rotating the fixing plate 403 facilitates the movement of the mounting tube 401 within the threaded hole on the adjusting plate 204, thereby facilitating the contact of the suction cup 402 at one end of the mounting tube 401 against the wall, thus facilitating the positioning of the mounting tube 401, adjusting plate 204, and mounting plate 202 onto the wall, thus positioning the insulated ladder body 1. The upper part is positioned, and the groove on the fixing plate 403 is convenient for the staff to place their hands, improving the ease of use of the fixing plate 403. The push-pull handle 6 can easily drive the push-pull rod 404 to slide inside the mounting tube 401, which in turn can easily drive the rubber piston 406 to move inside the mounting tube 401, thereby facilitating the injection and extraction of air inside the suction cup 402, making it easy for the suction cup 402 to adhere to the wall and be disassembled. The limiting plate 405 can easily position and install the rubber piston 406 to prevent the rubber piston 406 from falling off, improving the safety of the positioning component 4. The positioning ring 5 is fixed inside the mounting tube 401 near the end of the suction cup 402. The positioning ring 5 can prevent the rubber piston 406 from falling out of the mounting tube 401, further improving the safety of the positioning component 4.

[0057] Please refer to Figure 1 and Figure 8 The third embodiment of the present invention is as follows: Based on the second embodiment, it further includes two lower positioning mechanisms 3. The lower positioning mechanism 3 includes a fixed shaft 301. The fixed shafts 301 of the two lower positioning mechanisms are respectively fixedly embedded in the outer wall of one side of the corresponding main beam 101. A rotating plate 302 is rotatably sleeved on the outer surface of each fixed shaft 301. Multiple anti-slip teeth 303 are fixedly connected at equal intervals at the bottom of each rotating plate 302.

[0058] In this embodiment, the fixed shaft 301 is located near the bottom of the main beam 101, and the rotating plate 302 is rotatably sleeved on the surface of the fixed shaft 301, facilitating the angle adjustment between the rotating plate 302 and the main beam 101. The anti-slip effect of the rotating plate 302 is improved by the anti-slip teeth 303. During use, the rotating plate 302 abuts against the ground, increasing the contact area between the insulated ladder body 1 and the ground, thereby improving the pressure-bearing capacity of the bottom of the insulated ladder body 1. At the same time, through the anti-slip teeth 303 at the bottom of the rotating plate 302, no matter how much the insulated ladder body 1 rotates, the rotating plate 302 can always remain parallel and abut against the ground, improving the use effect of the lower positioning mechanism 3.

[0059] Please refer to Figures 2-4 and Figure 9 The fourth embodiment of the present invention is as follows: Based on the second embodiment, a connecting plate 7 is fixedly connected between the outer walls of one side of the two main beams 101. Two sliding grooves are opened on the outer wall of one side of the connecting plate 7. An abutment plate 8 is slidably embedded in the inner wall of each sliding groove. Limiting grooves are opened on both sides of the inner wall of each sliding groove. Limiting blocks 9 are fixedly connected to both sides of the outer wall of each abutment plate 8. A lever block 10 is fixedly connected to one side of the outer wall of each abutment plate 8. A notch is opened on one side of the outer wall of each main beam 101. An elastic locking block 11 is fixedly connected to both sides of the inner wall of each notch.

[0060] In this embodiment, the connecting plate 7 improves the connection stability between the two main beams 101 and enhances the strength of the insulated ladder body 1. The abutment plate 8 slides inside the sliding groove. When one end of the abutment plate 8 moves out of the sliding groove, it facilitates the support of the rotating mounting plate 202, making the mounting plate 202 perpendicular to the main beam 101, which in turn facilitates the installation and use of the upper positioning mechanism 2. At the same time, when the abutment plate 8 retracts into the sliding groove, it facilitates the retraction of the mounting plate 202, the adjusting plate 204, and the positioning component 4 into the fixed groove. The abutment plate 8 can be easily operated by the lever 10, improving its ease of use. The limiting groove on the inner wall of the sliding groove cooperates with the abutment plate 8 to improve the sliding stability of the abutment plate 8. The notch facilitates the embedding of the mounting tube 401 in the positioning component 4. The elastic locking block 11 can limit the mounting tube 401, preventing the mounting tube 401 from falling out of the fixed groove, and at the same time improving the stability of the positioning component 4 during installation and removal.

[0061] Specifically, the working principle of this embodiment is as follows: During use, the rotating plate 302 is placed against the substation maintenance work ground, and the upper end of the insulating ladder body 1 is against the wall. At this time, the rotating plate 302 is parallel and against the ground. The anti-slip teeth 303 improve the anti-slip effect of the rotating plate 302, facilitating the positioning of the lower part of the insulating ladder body 1. The anti-slip block 13 can protect the upper part of the insulating ladder body 1. The positioning component 4 is pulled out from the fixed groove, and the mounting tube 401 is pulled out from the notch. At this time, the mounting shaft 201 drives the mounting plate 202 to rotate, making the mounting plate 202 perpendicular to the main beam 101. The lever 10 is used to push the abutment plate 8 to move to the safe position. Below the mounting plate 202, position the mounting plate 202, rotate the adjusting plate 204, and the adjusting plate 204 rotates to be parallel to the wall via the mounting column 203. Rotate the fixing plate 403, causing the mounting tube 401 to rotate and move inside the threaded hole on the adjusting plate 204, so that the suction cup 402 abuts against the wall. Use the push-pull handle 6 to drive the push-pull rod 404 to move inside the mounting tube 401, causing the limiting plate 405 and the rubber piston 406 to move, extracting the air inside the suction cup 402, so that the suction cup 402 is firmly attached to the wall surface, and positioning it above the insulated ladder body 1, improving the stability of the insulated ladder body 1 in use.

[0062] In summary, the beneficial effects of the present invention are as follows:

[0063] (1) The mounting shaft inside the fixed groove rotates, facilitating the movement of the mounting plate, mounting column, and adjusting plate out of the fixed groove, thus facilitating the use of the positioning component. The mounting column connects the mounting plate and the adjusting plate, allowing the adjusting plate to rotate and thus adjust the angle of the positioning component. When the insulated ladder body is against the wall, the adjusting plate will be parallel to the wall, and the mounting tube will be perpendicular to the wall. Rotating the fixed plate facilitates the movement of the mounting tube inside the threaded hole on the adjusting plate, thus facilitating the suction cup at one end of the mounting tube to contact the wall, facilitating the positioning of the mounting tube, adjusting plate, and mounting plate onto the wall, and allowing for the positioning of the upper part of the insulated ladder body. The positioning and fixing plate features grooves that facilitate hand placement for operators, enhancing ease of use. A push-pull handle allows the push-pull rod to slide within the mounting tube, facilitating the movement of the rubber piston. This enables air injection and extraction from the suction cup, aiding in its adhesion to walls and easy disassembly. A limiting plate ensures proper positioning of the rubber piston, preventing it from detaching and improving safety. A positioning ring, fixed inside the mounting tube near the suction cup, further prevents the rubber piston from slipping out, enhancing overall safety.

[0064] (2) In this invention, the fixed shaft is set near the bottom of the main beam, and the rotating plate is rotated and sleeved on the surface of the fixed shaft, which facilitates the angle adjustment between the rotating plate and the main beam. The anti-slip effect of the rotating plate is improved by the anti-slip teeth. During use, the rotating plate abuts against the ground, and the rotating plate increases the contact area between the insulated ladder body and the ground, thereby improving the pressure bearing capacity of the bottom of the insulated ladder body. At the same time, the anti-slip teeth at the bottom of the rotating plate improve the use effect of the lower positioning mechanism.

[0065] (3) In this invention, the insulated ladder body adopts a straight structure. The insulated ladder body is used for substation maintenance operations. The anti-slip block on the top of the main beam is used to abut against the wall or utility pole wall at the maintenance work site, which can prevent the insulated ladder body from slipping at the abutment point and improve the anti-slip effect of the insulated ladder body. The anti-slip ridge enhances the anti-slip effect of the crossbeam and prevents workers from slipping when standing on the surface of the crossbeam, thus improving the safety of the insulated ladder body.

[0066] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An anti-tipping insulated ladder, characterized in that: Includes the insulated ladder body and two upper positioning mechanisms; The insulated ladder body includes two parallel main beams, and a fixing groove is provided on the outer wall of the side of the two main beams that are far apart from each other; the upper positioning mechanism is located inside the fixing groove. The upper positioning mechanism includes a mounting plate, an adjusting plate, and a positioning component; the mounting plates of the two upper positioning mechanisms are respectively disposed in the fixing groove and hinged to the main beam; one outer wall of the mounting plate is rotatably connected to the adjusting plate, and the positioning component is assembled and connected to the adjusting plate; The positioning component includes a mounting tube and a suction cup. The mounting tube is threadedly connected to the adjusting plate, and a suction cup is provided at one end of the mounting tube. The positioning assembly also includes a fixing plate, a push-pull rod, two limiting plates, and a rubber piston; The fixing plate is located at the other end of the mounting tube. The push-pull rod is slidably embedded in the outer wall of the fixing plate. Two limiting plates are provided at one end of the push-pull rod located inside the mounting tube. The two limiting plates are arranged at a preset interval. The rubber piston is fixedly located between the two limiting plates. The upper positioning mechanism also includes a connecting plate, an abutment plate, and a lever; The connecting plate is disposed between the two main beams, and the connecting plate is provided with a sliding groove that passes through the main beam. The position of the sliding groove matches the position of the mounting plate. The abutment plate is slidably embedded in the sliding groove, and when the abutment plate extends out of the sliding groove, it can support the mounting plate; The push block is located at the end of the abutment plate away from the main beam, and the push block can press against the main beam.

2. The anti-tipping insulated ladder according to claim 1, characterized in that: The end of the mounting tube near the suction cup has a positioning ring on its inner wall, which can press against the limiting plate.

3. The anti-tipping insulated ladder according to claim 1, characterized in that: The push-pull rod has a push-pull handle at one end located outside the mounting tube, and the push-pull handle has an anti-slip structure.

4. The anti-tipping insulated ladder according to claim 1, characterized in that: The upper positioning mechanism also includes a mounting shaft, which is rotatably embedded in the fixing groove, and the mounting plate is fixedly sleeved on the outer surface of the mounting shaft.

5. The anti-tipping insulated ladder according to claim 1, characterized in that: The bottom of the fixing groove has a notch, and an elastic block is provided in the notch. The elastic block is used to fix the positioning component.

6. The anti-tipping insulated ladder according to claim 1, characterized in that: Both main beams are equipped with anti-slip blocks at their tops.

7. The anti-tipping insulated ladder according to claim 1, characterized in that: It also includes two lower positioning mechanisms; each lower positioning mechanism includes a fixed shaft and a rotating plate. The fixed shafts of the two lower positioning mechanisms are symmetrically arranged at the bottom of the two main beams. The rotating plate is hinged to the main beam through the fixed shaft, and the bottom of the rotating plate is provided with anti-slip teeth.

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