A low-voltage folding insulated ladder

Abstract

This invention provides a low-voltage folding insulated ladder, belonging to the technical field of power grid operation and maintenance tools. It consists of two front ladder columns, a ladder board overlapping mechanism, multiple ladder boards, ladder board connecting columns, two rear ladder columns, and a ladder segment connecting mechanism. This low-voltage folding insulated ladder uses a flipping mechanism to fold the ladder boards upwards and tightly against the ladder board connecting columns, then tightens the columns to achieve folding and storage of the ladder, facilitating loading and transportation by workers. Each ladder can serve as a segment, and multiple ladders can be assembled and used using the ladder segment connecting mechanism. This folding insulated ladder not only meets the needs of operations at different heights, but the front and rear ladder columns also provide support to the ground, forming a stable triangular support structure that eliminates the need for personnel assistance and effectively avoids safety hazards caused by insufficient ground angles.

Description

Technical Field

[0001] This invention relates to the field of power grid operation and maintenance equipment technology, and more specifically, to a low-voltage folding insulated ladder. Background Technology

[0002] With the increasing demands for power supply reliability and the widespread adoption and development of distribution network operations, low-voltage live-line work has become the norm.

[0003] Therefore, power supply personnel typically need to carry insulated ladders for outdoor operations. However, current insulated ladders are usually single, straight ladders with a fixed length. If the ladder is too long when transported by vehicle, it can pose a safety hazard. They are also inconvenient to retrieve. Furthermore, single ladders need to be supported by a structure, and due to varying outdoor locations and geographical conditions, uneven surfaces, potholes, and weeds can affect the stability of the ladder and the angle with the ground, potentially causing problems. To increase safety, other personnel are usually needed to hold the ladder, which increases labor costs. Therefore, a low-voltage folding insulated ladder that can be used in combination and folded for storage is necessary in the power supply operation field. Summary of the Invention

[0004] The purpose of this invention is to provide a low-voltage folding insulated ladder, which aims to solve the problems pointed out in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a low-voltage folding insulated ladder, comprising:

[0007] Two front columns of the ladder body are connected at the bottom by a first telescopic rod, and a first U-shaped groove is provided on the inner side of each of the two front columns of the ladder body.

[0008] A ladder plate overlapping mechanism, wherein the ladder plate overlapping mechanism is installed inside the two first U-shaped grooves;

[0009] Multiple ladder boards, the bottom of which is placed on a ladder board overlapping mechanism, the surface of which is provided with strip-shaped anti-slip texture, and one end of which is connected to a flipping mechanism;

[0010] The ladder plate is connected to the column, and a second U-shaped groove is provided on the inner side of the ladder plate connecting the column. The second U-shaped groove is interlocked with the flipping mechanism.

[0011] Two rear columns of the ladder are connected at their bottoms by a second telescopic rod, and the tops of the rear columns are rotatably connected to the tops of the front columns of the ladder by pins.

[0012] A stair section connection mechanism, the stair section connection mechanism including a connecting piece fixedly connected to the top of the front column of the stair body, and a U-shaped seat fixedly connected to the top of the connecting piece.

[0013] In one embodiment of the present invention, the bottom end of the front column of the ladder is fixedly connected with anti-slip ladder feet.

[0014] In one embodiment of the present invention, the ladder board overlapping mechanism includes multiple overlapping plate placement slots formed in a first U-shaped groove. The overlapping plates are rotatably connected to the inside of the overlapping plate placement slots via spring shafts. One end of each overlapping plate is fixedly connected to an overlapping rod. The ladder board overlapping mechanism also includes a pull rod slidably placed inside the first U-shaped groove. The surface of the pull rod has multiple openings. One end of the overlapping rod is inserted into the corresponding opening. One end of the pull rod is fixedly connected to a lever. The lever is slidably connected to a guide groove formed on the outer side of the front column of the ladder. One end of the lever is fixedly connected to a locking member.

[0015] In one embodiment of the present invention, a support plate is fixedly connected to the bottom of the ladder plate, and multiple reinforcing ribs are fixedly connected to the bottom of the support plate. The outside of the ladder plate is fixedly covered with insulating rubber.

[0016] In one embodiment of the present invention, the flipping mechanism includes a U-shaped plate that is engaged with one end of a ladder plate. The bottom of the U-shaped plate is fixedly connected to one end of a support plate. A hinge joint is fixedly connected to one side of the U-shaped plate. One end of the hinge joint is connected to a hinge seat via a pin. One end of the hinge seat is fixedly connected to a connecting column of the ladder plate that passes through a second U-shaped groove via a connecting shaft.

[0017] In one embodiment of the present invention, an overlap block is fixedly connected to the outside of the hinge seat, the bottom of the overlap block overlaps with a support piece fixedly connected inside the second U-shaped groove, and the bottom of the ladder plate connecting column is rotatably connected to a support top plate through a spring hinge shaft. One end of the support top plate abuts against the bottom of a wedge-shaped groove provided on one of the front columns of the ladder.

[0018] In one embodiment of the present invention, the ladder segment connecting mechanism further includes an L-shaped notch opened at the top of the rear column of the ladder body, a plug-in rod is fixedly connected to the top of the L-shaped notch, and a plug-in hole adapted to the size of the plug-in rod is opened at the bottom of the rear column of the ladder body.

[0019] In one embodiment of the present invention, a rubber strip is fixedly connected to the middle of one of the front columns of the ladder, and a hanging hole is provided at one end of the rubber strip. The hanging hole is hooked to a T-shaped column fixedly connected to the outer side of the rear column of the ladder.

[0020] In one embodiment of the present invention, a rotating connection mechanism is fixedly connected to the outer side of the rear column of the ladder. The rotating connection mechanism includes a sleeve seat fixedly connected to the outer side of the rear column of the ladder, in which a T-shaped spring pin is sleeved. The T-shaped spring pin is inserted into a pin hole provided in the connecting column of the ladder plate.

[0021] In one embodiment of the present invention, the height distance between two adjacent ladder slabs is greater than the length of the ladder slab, and the ladder slab, the front column of the ladder body, the ladder slab connecting column, and the rear column of the ladder body are all made of insulating material.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1) This type of low-voltage folding insulated ladder uses a flipping mechanism to fold the ladder plates upwards and close them to the ladder plate connecting column. Then, the ladder plate connecting column is rotated to the inside of the rear column of one of the ladder bodies. The rear column of the ladder body is then rotated so that it is close to the front column of one of the ladder bodies. Then, the rear column of the other ladder body is rotated to be close to the front column of another ladder body. Finally, the two telescopic rods are retracted to achieve folding and storage of the ladder, reducing the overall volume of the ladder. This makes it easier for workers to load and transport the ladder. Each ladder of this type of low-voltage folding insulated ladder can be used as a ladder segment. Multiple ladders can be assembled and used using a ladder segment connecting mechanism. This allows the folding insulated ladder of the present invention to meet the needs of work at different heights.

[0024] 2) When this type of low-voltage folding insulated ladder is unfolded and used, it uses the front and rear uprights of the ladder to support the ground, forming a stable triangular support structure. No personnel are required to help it. It can also effectively avoid safety hazards caused by insufficient ground angle and improve the safety of workers when working at height.

[0025] 3) The ladder board is made of insulating material, which is corrosion-resistant, not easy to age, and highly durable. It can also effectively prevent the risk of electric shock. The anti-slip texture on the ladder board can increase friction and prevent people from slipping when stepping on the ladder board, further increasing the safety of this type of low-voltage folding insulated ladder. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 A schematic diagram of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0028] Figure 2 One of the structural schematic diagrams of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0029] Figure 3 A low-voltage folding insulated ladder provided for embodiments of the present invention Figure 2 Enlarged view of point A;

[0030] Figure 4 A schematic diagram of the ladder plate overlapping mechanism of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the ladder plate structure of a low-voltage folding insulated ladder is provided for an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the bottom structure of the ladder plate of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the disassembled structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0034] Figure 8 One of the schematic diagrams of the disassembled structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0035] Figure 9 A schematic diagram of the supporting top plate structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0036] Figure 10 A schematic diagram of the insertion hole structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0037] Figure 11 A schematic diagram of the folding and storage structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of a combined use structure of a low-voltage folding insulated ladder provided for an embodiment of the present invention.

[0039] Icons: 1. Front column of the ladder; 11. First telescopic rod; 12. First U-shaped groove; 121. Support plate; 13. Anti-slip ladder feet; 14. Wedge groove; 15. Guide groove; 16. Rubber strip; 17. Hanging hole; 18. T-shaped column; 2. Ladder board overlapping mechanism; 21. Overlap plate placement groove; 22. Spring pivot; 23. Overlap plate; 24. Overlap rod; 25. Tie rod; 26. Opening; 27. Pulley; 28. Locking element; 3. Ladder board; 31. Anti-slip texture; 32. Flipping mechanism; 321. U-shaped plate; 322. 323. Hinge joint; 324. Hinge seat; 325. Connecting shaft; 326. Ladder block; 33. Support plate; 34. Reinforcing rib; 35. Insulating rubber; 4. Ladder board connecting column; 41. Second U-shaped groove; 42. Spring hinge shaft; 43. Support top plate; 5. Ladder body rear column; 51. Second telescopic rod; 6. Ladder section connecting mechanism; 61. Connecting piece; 62. U-shaped seat; 63. L-shaped notch; 64. Insert rod; 65. Insert hole; 7. Rotating connection mechanism; 71. Sleeve seat; 72. T-shaped spring pin; 73. Pin hole. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] Example

[0048] Please see Figure 1-12 A low-voltage folding insulated ladder consists of two front ladder columns 1, a ladder board overlapping mechanism 2, multiple ladder boards 3, ladder board connecting columns 4, two rear ladder columns 5, and a ladder segment connecting mechanism 6.

[0049] The low-voltage folding insulated ladder has a relatively simple structure. After flipping over the multiple ladder plates 3, the ladder plate overlapping mechanism 2 is retracted, and the ladder uprights are rotated and tightened. The first telescopic rod 11 and the second telescopic rod 51 retract under pressure, reducing the distance between the two front uprights 1 and the two rear uprights 5 of the ladder body. This allows for quick folding and storage of the ladder, reducing its volume and making it convenient for workers to load and transport the stored ladder in a vehicle.

[0050] The bottom of the two front columns 1 of the ladder is connected by a first telescopic rod 11. The inner side of the two front columns 1 of the ladder is provided with a first U-shaped groove 12. The ladder board overlapping mechanism 2 is installed inside the two first U-shaped grooves 12. The bottom of the ladder board 3 is placed on the ladder board overlapping mechanism 2. The surface of the ladder board 3 is provided with strip-shaped anti-slip texture 31. One end of the ladder board 3 is connected to a flipping mechanism 32. The inner side of the ladder board connecting column 4 is provided with a second U-shaped groove 41. The second U-shaped groove 41 is inserted and connected to the flipping mechanism 32. The bottom of the two rear columns 5 of the ladder is connected by a second telescopic rod 51. The top of the rear column 5 of the ladder is rotatably connected to the top of the front column 1 of the ladder by a pin. The ladder segment connecting mechanism 6 includes a connecting piece 61 fixedly connected to the top of the front column 1 of the ladder. The top of the connecting piece 61 is fixedly connected to a U-shaped seat 62.

[0051] Please refer to Figure 11 Specifically, when using this type of low-voltage folding insulated ladder, the two front uprights 1 and the two rear uprights 5 of the ladder can be spread out first, so that the front uprights 1 and the rear uprights 5 form a stable triangular support structure and are supported by the ground. Then, the ladder board overlapping mechanism 2 is unfolded, and the ladder board connecting column 4 is pulled to keep it parallel to one of the front uprights 1. Then, multiple ladder boards 3 are flipped downwards using the flipping mechanism 32, so that the ladder boards 3 overlap on the ladder board overlapping mechanism 2. Then, personnel can step on the ladder boards 3 to carry out high-altitude operations and realize emergency repairs on power supply facilities.

[0052] Please refer to Figure 12 When the working height is high, three low-voltage folding insulated ladders can be combined using the ladder segment connecting mechanism 6 to form a stable triangular ladder assembly. The combined ladder increases the height of the ladder, making it easier for workers to carry out emergency repairs on power supply facilities at higher locations.

[0053] Please refer to Figure 5 In this embodiment, the bottom end of the front column 1 of the ladder is fixedly connected with anti-slip ladder feet 13.

[0054] Specifically, the anti-slip ladder feet 13 increase the friction between the front upright 1 of the ladder and the ground support, effectively preventing the ladder from sliding during use.

[0055] Please refer to Figure 1 , Figure 4 , Figure 7 and Figure 8 In this embodiment: the ladder plate overlapping mechanism 2 includes multiple overlapping plate placement slots 21 opened in the first U-shaped groove 12. The overlapping plate 23 is rotatably connected to the inside of the overlapping plate placement slot 21 through a spring shaft 22. One end of the overlapping plate 23 is fixedly connected to an overlapping rod 24. The ladder plate overlapping mechanism 2 also includes a pull rod 25 slidably placed inside the first U-shaped groove 12. Multiple openings 26 are opened on the surface of the pull rod 25. One end of the overlapping rod 24 is inserted into the corresponding opening 26. One end of the pull rod 25 is fixedly connected to a lever 27. The lever 27 is slidably connected to a guide groove 15 opened on the outside of the front column 1 of the ladder. One end of the lever 27 is fixedly connected to a locking member 28.

[0056] Specifically, when the ladder board 3 needs to be supported using the ladder board overlapping mechanism 2, the operator first pulls the lever 27 to slide it to the bottom of the guide groove 15. The lever 27 drives the pull rod 25 to move downward. When the pull rod 25 moves downward, its opening 26 presses down on the overlapping rod 24. The overlapping rod 24 drives the overlapping plate 23 to rotate around the spring shaft 22, so that the overlapping plate 23 rotates out of the overlapping plate placement groove 21 and one end of the overlapping plate 23 passes through the first U-shaped groove 12. When the lever 27 slides to the bottom of the guide groove 15, the overlapping plate 23 remains perpendicular to the first U-shaped groove 12, and the bottom of the other end of the overlapping plate 23 is pressed against the bottom of the overlapping plate placement groove 21, thereby ensuring that the overlapping plate 23 can stably support the ladder board 3.

[0057] To prevent the overlapping plate 23 from rotating when supporting the ladder plate 3, the locking member 28 can be used to lock the lever 27 to the guide groove 15. The locking member 28 can be a spring pin. The bottom of the guide groove 15 is provided with a spring pin hole. When the lever 27 slides to the bottom of the guide groove 15, the spring pin inserts into the spring pin hole through elastic potential energy to limit the lever 27 in the guide groove 15.

[0058] When the ladder needs to be folded and stored after use, the spring pin can be pulled out from the spring pin hole and the push block 27 can be pushed upward. The overlapping plate 23 will rotate and reset under the action of the spring shaft 22 and fold into the overlapping plate placement groove 21 to prevent the overlapping plate 23 from scratching the workers or affecting the rotation of the column.

[0059] Please refer to Figure 5-6 In this embodiment: a support plate 33 is fixedly connected to the bottom of the ladder plate 3, and multiple reinforcing ribs 34 are fixedly connected to the bottom of the support plate 33. The ladder plate 3 is fixedly covered with insulating rubber 35.

[0060] Specifically, the support plate 33 and reinforcing ribs 34 can increase the structural strength of the ladder plate 3 and ensure the safety of workers when they stand on the ladder plate 3. The insulating rubber 35 can increase the insulation of the ladder plate 3 and effectively prevent the risk of electric shock to workers. The insulating rubber 35 can be in a bright color to better remind people around that workers are working.

[0061] The same can be referred to Figure 5-6 In this embodiment: the flipping mechanism 32 includes a U-shaped plate 321 that is snapped onto one end of the ladder plate 3. The bottom of the U-shaped plate 321 is fixedly connected to one end of the support plate 33. A hinge joint 322 is fixedly connected to one side of the U-shaped plate 321. One end of the hinge joint 322 is connected to a hinge seat 323 by a pin. One end of the hinge seat 323 is fixedly connected to the ladder plate connecting column 4 that passes through the second U-shaped groove 41 via a connecting shaft 324.

[0062] Specifically, when the ladder board 3 needs to be stored, the ladder board 3 is rotated upwards. The U-shaped plate 321 drives the hinge joint 322 to rotate around the pin within the hinge seat 323, thereby folding the rotating ladder board 3 and bringing it closer to the inner side of the ladder board connecting column 4. This makes it convenient for workers to fold the ladder further. Since the hinge joint 322 can only rotate upwards around the hinge seat 323, when the ladder board 3 is open and a person is standing on it, the hinge joint 322 can also work with the U-shaped plate 321 to provide effective and stable support for the ladder board 3.

[0063] In order to increase the stability of the ladder board 3 when it is folded up and stored, and to prevent it from rotating and opening, the pin can also be a damping pivot. By utilizing the damping effect of the damping pivot, the ladder board 3 can be rotated and stopped at any time.

[0064] Please refer to Figure 6 and Figure 9 In this embodiment: the hinge seat 323 is fixedly connected to the outside of the mounting block 325, the bottom of the mounting block 325 overlaps with the support piece 121 fixedly connected inside the second U-shaped groove 41, the bottom of the ladder plate connecting column 4 is rotatably connected to the support top plate 43 through the spring hinge shaft 42, and one end of the support top plate 43 abuts against the bottom of the wedge-shaped groove 14 provided in one of the ladder front columns 1.

[0065] Specifically, when the ladder 3 is opened and a person stands on it, the hinge seat 323 will transfer the force to the mounting block 325, and the support plate 121 can support and limit the mounting block 325 after it is subjected to force. While further increasing the stable support of the ladder 3, it can also prevent the hinge seat 323 from shaking or rotating.

[0066] Please refer to Figure 1 and Figure 12In this embodiment, the ladder segment connecting mechanism 6 also includes an L-shaped notch 63 opened at the top of the rear column 5 of the ladder body. A plug rod 64 is fixedly connected to the top of the L-shaped notch 63, and a plug hole 65 adapted to the size of the plug rod 64 is opened at the bottom of the rear column 5 of the ladder body.

[0067] Specifically, when using a ladder as a single segment and combining multiple segments, two ladder segments can be opened first to serve as bases. Then, another ladder can be opened and placed on top of the two base ladders. The first U-shaped groove 12 of the top ladder is fitted onto the outside of the U-shaped seat 62 of one of the base ladders. The U-shaped groove at the top of the U-shaped seat 62 is then engaged and locked with both ends of the first telescopic rod 11 of the top ladder to prevent the front upright 1 of the top ladder from wobbling at the top of the front upright 1 of the bottom ladder. The bottom of the rear upright 5 of the top ladder is placed at the L-shaped notch 63 of the other bottom ladder, and the insertion hole 65 of the rear upright 5 is fitted onto the outside of the insertion rod 64 to prevent the rear upright 5 of the top ladder from wobbling at the top of the rear upright 5 of the bottom ladder. This allows for the rapid and stable assembly of the three ladders, resulting in a higher working height to meet different operational needs.

[0068] Please refer to Figure 1 and Figure 11 In this embodiment: a rubber strip 16 is fixedly connected to the middle of the front column 1 of the ladder. One end of the rubber strip 16 is provided with a hanging hole 17, which is hung with a T-shaped column 18 fixedly connected to the outside of the rear column 5 of the ladder.

[0069] Specifically, when unfolding the ladder, the hanging hole 17 of the rubber strap 16 can be hooked to the T-shaped post 18 to prevent the ladder from collapsing due to excessive opening angle between the front upright 1 and the rear upright 5. When folding and storing the ladder, the rubber strap 16 can be wrapped around the front upright 1 and the rear upright 5 and then hooked to the T-shaped post 18 to tie the multiple uprights tightly and prevent the ladder from becoming loose during carrying or transportation.

[0070] Please refer to Figure 1 and Figure 3 In this embodiment: a rotating connection mechanism 7 is fixedly connected to the outside of one of the ladder rear columns 5. The rotating connection mechanism 7 includes a sleeve seat 71 fixedly connected to the outside of the ladder rear column 5, and a T-shaped spring pin 72 is sleeved inside. The T-shaped spring pin 72 is inserted into the pin hole 73 opened in the ladder plate connecting column 4.

[0071] Specifically, the T-shaped spring pin 72 of the copper drum is inserted into the pin hole 73, which ensures that the rear column 5 of the ladder body and the connecting column 4 of the ladder plate can rotate normally, while also preventing the connecting column 4 of the ladder plate from separating from the rear column 5 of the ladder body during use.

[0072] Please refer to Figure 1 In this embodiment, the height distance between two adjacent ladder plates 3 is greater than the length of the ladder plate 3. The ladder plate 3, the front column 1 of the ladder body, the ladder plate connecting column 4 and the rear column 5 of the ladder body are all made of insulating material.

[0073] Specifically, by controlling the distance between adjacent ladder boards 3, it is ensured that the ladder boards 3 can be flipped up and stored normally. The ladder boards 3, the front uprights 1, the ladder board connecting uprights 4, and the rear uprights 5, which are made of insulating materials, can effectively ensure the safety of ladder use. The insulating materials can be plastic, wood, rubber, fiberglass, etc.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A low-voltage folding insulated ladder, characterized in that, include: Two front columns (1) of the ladder body are connected at the bottom by a first telescopic rod (11), and a first U-shaped groove (12) is opened on the inner side of each of the two front columns (1). Ladder board overlapping mechanism (2), which is installed inside the two first U-shaped grooves (12); Multiple ladder boards (3), the bottom of the ladder board (3) is placed on the ladder board overlapping mechanism (2), the surface of the ladder board (3) is provided with strip-shaped anti-slip texture (31), and one end of the ladder board (3) is connected to a flipping mechanism (32). The ladder plate connecting column (4) has a second U-shaped groove (41) on its inner side, and the second U-shaped groove (41) is interlocked with the flipping mechanism (32). Two rear columns (5) of the ladder body are connected at the bottom by a second telescopic rod (51), and the top of the rear column (5) of the ladder body is rotatably connected to the top of the front column (1) of the ladder body by a pin. The ladder segment connection mechanism (6) includes a connecting piece (61) fixedly connected to the top of the front column (1) of the ladder body, and a U-shaped seat (62) is fixedly connected to the top of the connecting piece (61). The ladder segment connection mechanism (6) also includes an L-shaped notch (63) opened at the top of the rear column (5) of the ladder body, and a plug rod (64) is fixedly connected to the top of the L-shaped notch (63). A plug hole (65) adapted to the size of the plug rod (64) is opened at the bottom of the rear column (5) of the ladder body. A rotating connection mechanism (7) is fixedly connected to the outside of the rear column (5) of the ladder body. The rotating connection mechanism (7) includes a sleeve seat (71) fixedly connected to the outside of the rear column (5) of the ladder body, and a T-shaped spring pin (72) is sleeved inside. The T-shaped spring pin (72) is inserted into the pin hole (73) opened in the ladder plate connecting column (4).

2. A low-voltage folding insulated ladder according to claim 1, characterized in that, The bottom end of the front column (1) of the ladder is fixedly connected to the anti-slip ladder foot (13).

3. A low-voltage folding insulated ladder according to claim 1, characterized in that, The ladder board overlapping mechanism (2) includes multiple overlapping plate placement slots (21) opened in the first U-shaped groove (12). The overlapping plate (23) is rotatably connected inside the overlapping plate placement slot (21) through a spring shaft (22). One end of the overlapping plate (23) is fixedly connected to an overlapping rod (24). The ladder board overlapping mechanism (2) also includes a pull rod (25) slidably placed inside the first U-shaped groove (12). The surface of the pull rod (25) is provided with multiple openings (26). One end of the overlapping rod (24) is inserted into the corresponding opening (26). One end of the pull rod (25) is fixedly connected to a lever (27). The lever (27) is slidably connected to a guide groove (15) opened on the outside of the front column (1) of the ladder body. One end of the lever (27) is fixedly connected to a locking member (28).

4. A low-voltage folding insulated ladder according to claim 1, characterized in that, The bottom of the ladder plate (3) is fixedly connected to a support plate (33), and the bottom of the support plate (33) is fixedly connected to multiple reinforcing ribs (34). The outside of the ladder plate (3) is fixedly covered with insulating rubber (35).

5. A low-voltage folding insulated ladder according to claim 1, characterized in that, The flipping mechanism (32) includes a U-shaped plate (321) that is snapped onto one end of the ladder plate (3). The bottom of the U-shaped plate (321) is fixedly connected to one end of the support plate (33). A hinge joint (322) is fixedly connected to one side of the U-shaped plate (321). One end of the hinge joint (322) is connected to a hinge seat (323) by a pin. One end of the hinge seat (323) is fixedly connected to the ladder plate connecting column (4) through the second U-shaped groove (41) via a connecting shaft (324).

6. A low-voltage folding insulated ladder according to claim 5, characterized in that, The hinge seat (323) is externally fixedly connected to a block (325). The bottom of the block (325) overlaps with a support piece (121) fixedly connected inside the second U-shaped groove (41). The bottom of the ladder plate connecting column (4) is rotatably connected to a support top plate (43) through a spring hinge shaft (42). One end of the support top plate (43) abuts against the bottom of a wedge-shaped groove (14) provided on one of the ladder front columns (1).

7. A low-voltage folding insulated ladder according to claim 1, characterized in that, A rubber strip (16) is fixedly connected to the middle of one of the front columns (1) of the ladder. A hanging hole (17) is provided at one end of the rubber strip (16). The hanging hole (17) is connected to a T-shaped column (18) fixedly connected to the outside of the rear column (5) of the ladder.

8. A low-voltage folding insulated ladder according to claim 1, characterized in that, The height distance between two adjacent ladder plates (3) is greater than the length of the ladder plate (3). The ladder plate (3), the front column (1) of the ladder body, the ladder plate connecting column (4) and the rear column (5) of the ladder body are all made of insulating material.

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