Double-platform height-adjustable herringbone ladder

Abstract

The utility model discloses a double-platform height-adjustable herringbone ladder, which belongs to the technical field of herringbone ladders, and comprises a first ladder assembly and a second ladder assembly, and the upper ends of the first ladder assembly and the second ladder assembly are connected; each of the first ladder frame and the second ladder frame comprises two parallel ladder columns and a plurality of ladder pedals; the plurality of ladder pedals are movably connected between the two ladder columns and can slide up and down relative to the ladder pedals; the two ends of the ladder pedals are sleeved with positioning assemblies, and the positioning assemblies are used for connecting and fixing the ladder columns and the ladder pedals. Through the design of the sliding type rungs and the detachable positioning shell, the height adjustment flexibility of the ladder is improved, the positions of the rungs can be rapidly adjusted according to actual requirements, the ladder can adapt to working scenes with different height requirements, and the universality and adaptability of the ladder are improved.

Description

Technical Field

[0001] This utility model relates to the field of A-frame ladder technology, specifically to a dual-platform height-adjustable A-frame ladder. Background Technology

[0002] In many fields such as construction, home repair, and decoration, A-frame ladders are widely used as common tools for working at heights. For example, Chinese patent CN223018550U discloses an A-frame ladder to prevent tools from falling, which includes two support legs. A storage box is fixedly connected to the top of each support leg. Limiting mechanisms are provided on the front and rear sides of the storage box, and magnetic balls are installed inside the storage box. The limiting mechanism includes four limiting posts, a limiting block, and a limiting box. The side of the limiting post closest to the limiting block is fixedly connected to the limiting block, and the surface of the limiting block is in movable contact with the inner wall of the limiting box. This solves the problem in existing technologies where the tops of the left and right support legs lack a structure for storing and limiting tools.

[0003] However, the steps of traditional A-frame ladders are usually fixed in position. When users face tasks at different heights, they cannot flexibly adjust the steps according to the actual working height, making it difficult for them to find the most suitable standing position. This situation can easily cause an imbalance in the body's center of gravity, creating significant safety hazards for users working at heights and increasing the risk of accidents such as falls from heights.

[0004] Furthermore, in real-world work scenarios, many tasks require two people to work together. However, traditional A-frame ladders have platforms of equal height on both sides, which cannot meet the needs of operators at different heights in tasks requiring coordination, such as electrical wiring and pipe installation. This results in low work efficiency and extreme inconvenience. As modern work scenarios increasingly demand flexibility, safety, and practicality from climbing tools, the aforementioned shortcomings of traditional A-frame ladders are becoming increasingly apparent, necessitating structural improvements and innovations. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a dual-platform height-adjustable A-frame ladder, aiming to solve the problem that traditional A-frame ladders cannot adequately meet the height requirements of diverse operations. To achieve the above objective, this utility model provides the following technical solution:

[0006] A double-platform height-adjustable A-frame ladder includes a first ladder frame and a second ladder frame, with the upper ends of the first and second ladder frames connected together. Each of the first and second ladder frames includes two parallel ladder posts and several steps. The steps are movably connected between the two ladder posts and can slide up and down relative to the steps. Positioning components are fitted at both ends of each step for connecting and fixing the ladder posts and the steps.

[0007] Furthermore, the ladder column is provided with a plurality of equally spaced positioning holes; both ends of the ladder step are provided with through slots for the ladder column to move; both ends of the ladder step pass through the ladder column and cooperate with the positioning component; the positioning component includes a positioning shell sleeved on the end of the ladder step, and the positioning shell is provided with a fixing component for cooperating with the positioning hole.

[0008] Furthermore, the fixing component includes a locking plate, one end of which is fixedly connected to the inner wall of the positioning shell, and the other end is connected to a locking member, which is used to fix the locking plate in place.

[0009] Furthermore, the locking member includes a threaded rod with one end fixedly connected to the clamping plate; a rotating plate and a nut that cooperate with the threaded rod are movably sleeved on the surface of the threaded rod, and the rotating plate is located between the nut and the clamping plate.

[0010] Furthermore, the positioning shell has a through hole for the ladder column to move.

[0011] Furthermore, the upper ends of the first and second ladders are hinged.

[0012] Furthermore, the inner wall of the positioning shell is provided with a support member.

[0013] Furthermore, the support member includes a support plate fixedly connected to the inner wall of the positioning shell, and the surface of the support plate has a through hole for the ladder column to move.

[0014] Furthermore, the top of the ladder step is provided with a footboard.

[0015] Furthermore, the tread component includes a tread platform fixedly connected to the top surface of the step, and a diagonal brace is fixedly connected to the bottom of the tread platform, with one side of the diagonal brace fixedly connected to the side wall of the step.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model improves the flexibility of ladder height adjustment through the design of sliding ladder steps and removable positioning shell. The position of the ladder steps can be quickly adjusted according to actual needs, which can adapt to different work scenarios with different height requirements and improve the versatility and adaptability of the ladder.

[0018] 2. The step platform of this utility model can increase the stepping area of ​​the ladder steps, reduce the risk of workers falling, and can be used for two people to work together or temporarily place toolboxes, thus improving the practicality of the ladder. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall three-dimensional structure provided for this utility model;

[0020] Figure 2 This is a partial three-dimensional structural schematic diagram provided for this utility model;

[0021] Figure 3 A bottom-view perspective view of the pedal component provided by this utility model;

[0022] Figure 4 A three-dimensional structural diagram of the positioning shell provided by this utility model;

[0023] Figure 5 A three-dimensional structural diagram of the internal structure of the positioning shell provided by this utility model.

[0024] The attached diagram is labeled as follows: 1. Ladder column; 11. Positioning hole; 2. Ladder step; 21. Through slot; 3. Positioning assembly; 31. Positioning shell; 311. Through hole one; 32. Clamping plate; 33. Threaded rod; 34. Rotating plate; 35. Nut; 4. Support component; 41. Support plate; 42. Through hole two; 5. Pedal component; 51. Pedal platform; 52. Diagonal brace block. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0028] In the description of this utility model, "multiple" means two or more.

[0029] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0030] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Example 1

[0033] See attached Figures 1-5 This embodiment provides a dual-platform height-adjustable A-frame ladder, such as... Figure 1 As shown, the system includes a first ladder frame and a second ladder frame, with their upper ends connected. Preferably, the upper ends of the first and second ladder frames are hinged. Each of the first and second ladder frames includes two parallel ladder posts 1, with a plurality of step stools 2 movably connected between the two ladder posts 1. The step stools 2 are movably connected between the two ladder posts 1 and can slide up and down relative to the step stools 2. Positioning components 3 are fitted at both ends of each step stool 2, serving to connect and fix the ladder posts 1 and the step stools 2. When the height of the step stool 2 needs to be adjusted, the fixing between the ladder posts 1 and the step stool 2 is released through the positioning components 3, and then the height of the step stool 2 is adjusted to a suitable position according to the specific situation. Finally, the adjusted step stool 2 is connected and fixed to the ladder posts 1 through the positioning components 3.

[0034] The specific structure of positioning component 3 is as follows:

[0035] The ladder post 1 has several equally spaced positioning holes 11, the spacing of which can be set according to specific circumstances. Both ends of the ladder step 2 have through slots 21, allowing the ladder post 1 to move. The design of the through slots 21 enables the ladder step 2 to move up and down along the ladder post 1, thereby adjusting its height. Figure 4 and Figure 5 As shown, positioning components 3 are movably fitted at both ends of the stair step 2. The positioning components 3 are fitted onto the positioning shells 31 at the ends of the stair step 2. The surface of the positioning shells 31 has through holes 311 for the movement of the stair column 1. A retaining plate 32 is fixedly connected to the inner wall of the positioning shells 31. A threaded rod 33 is fixedly connected to one side of the retaining plate 32. A rotating plate 34 is movably fitted onto the surface of the threaded rod 33, and a nut 35 is threaded onto the surface of the rod. The rotating plate 34 is located between the nut 35 and the retaining plate 32. The retaining plate 32 can movably penetrate into the inner cavity of the corresponding positioning hole 11. The rotating plate 34 has the same dimensions as the retaining plate 32 and abuts against the side wall of the stair column 1. The nut 35 is located outside the rotating plate 34. By rotating the nut 35, the rotating plate 34 can be pushed against the side wall of the stair column 1, thereby locking the position of the stair column 1. This design ensures the stability of the stair step 2 and facilitates adjustment of the height of the stair step 2.

[0036] In one specific embodiment of this utility model, the inner wall of the positioning shell 31 is further provided with a support member 4. The support member 4 includes a support plate 41 fixedly connected to the inner wall of the positioning shell 31, and the surface of the support plate 41 has a through hole 42 for the ladder column 1 to move. The provision of the support member 4 enhances the connection stability between the positioning shell 31 and the ladder column 1, reduces the swaying of the ladder column 1 during movement, and also provides additional support for the ladder step 2.

[0037] In use, unscrew nut 35, rotate plate 34 to a horizontal position, remove positioning shell 31 from the surface of ladder step 2 to unlock ladder step 2, slide ladder step 2 up and down between two ladder posts 1 to adjust the height of ladder step 2. This design improves the flexibility of ladder height adjustment, and the position of ladder step 2 can be quickly adjusted according to actual needs. It can adapt to different work scenarios with different height requirements, and improve the versatility and adaptability of ladder.

[0038] It should be noted that the upper ends of the first and second ladders are hinged. Since hinged connections are existing technology, they will not be described in detail here.

[0039] Example 2

[0040] See attached Figures 1-5 Based on Embodiment 2, this embodiment further provides a double-platform height-adjustable A-frame ladder. The difference between this A-frame ladder and the one provided in Embodiment 1 is that the top of the rungs 2 is also equipped with a footplate 5. For example... Figure 2 and Figure 3As shown, the footplate component 5 includes a footplate platform 51 fixedly connected to the top surface of the step 2. A diagonal brace 52 is fixedly connected to the bottom of the footplate platform 51, and one side of the diagonal brace 52 is fixedly connected to the side wall of the step 2. The footplate platform 51 increases the stepping area of ​​the step 2, improving safety and comfort. The diagonal brace 52 enhances the connection stability between the footplate platform 51 and the step 2, reducing shaking and deformation during stepping.

[0041] The usage process of the double-platform A-frame ladder provided by this utility model is as follows:

[0042] When the height of step 2 needs to be adjusted, first unscrew nut 35 to remove the opposing force on the surface of rotating plate 34, then rotate rotating plate 34 to a horizontal position. Positioning shell 31 is removed from the surface of step 2, causing locking plate 32 to disengage from the inner cavity of positioning hole 11, thereby unlocking step 2. Step 2 is then slid up and down between the two ladder posts 1 to adjust its height. After moving to the appropriate height, positioning shell 31 is placed on one end of step 2. At this time, locking plate 32 is inserted into the inner cavity of the corresponding positioning hole 11, and rotating plate 34 passes through positioning hole 11 into the inner side of ladder post 1. Positioning hole 11 is rotated to the surface of screw to hold rotating plate 34 in place, thus completing the locking.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A double platform height adjustable ladder, characterized by: It includes a first ladder and a second ladder, with the upper ends of the first ladder and the second ladder connected together; both the first ladder and the second ladder include two parallel ladder posts (1) and several ladder steps (2); several ladder steps (2) are movably connected between the two ladder posts (1) and can slide up and down relative to the ladder steps (2); both ends of the ladder steps (2) are fitted with positioning components (3), which are used for connection and fixation between the ladder posts (1) and the ladder steps (2).

2. The dual platform height adjustable ladder of claim 1, wherein: The ladder post (1) has several equally spaced positioning holes (11); both ends of the ladder step (2) have through slots (21) for the ladder post (1) to move; both ends of the ladder step (2) pass through the ladder post (1) and cooperate with the positioning component (3); the positioning component (3) includes a positioning shell (31) sleeved on the end of the ladder step (2), and the positioning shell (31) has a fixing component for cooperating with the positioning hole (11).

3. A dual platform height adjustable herringbone ladder according to claim 2, wherein: The fixing component includes a clamping plate (32), one end of which is fixedly connected to the inner wall of the positioning shell (31), and the other end is connected to a locking member, which is used to fix the clamping plate (32) in place.

4. The dual platform height adjustable ladder of claim 3, wherein: The locking component includes a threaded rod (33) with one end fixedly connected to the clamping plate (32); a rotating plate (34) and a nut (35) cooperating with the threaded rod (33) are movably sleeved on the surface of the threaded rod (33), and the rotating plate (34) is located between the nut (35) and the clamping plate (32).

5. A double-platform height-adjustable A-frame ladder according to claim 2, characterized in that: The positioning shell (31) has a through hole (311) for the ladder column (1) to move.

6. A double-platform height-adjustable A-frame ladder according to claim 1, characterized in that: The upper ends of the first and second ladders are hinged.

7. A double-platform height-adjustable A-frame ladder according to claim 2, characterized in that: The inner wall of the positioning shell (31) is provided with a support member (4).

8. A double-platform height-adjustable A-frame ladder according to claim 7, characterized in that: The support member (4) includes a support plate (41) fixedly connected to the inner wall of the positioning shell (31), and the surface of the support plate (41) is provided with a through hole (42) for the ladder column (1) to move.

9. A double-platform height-adjustable A-frame ladder according to claim 1, characterized in that: The top of the ladder step (2) is provided with a footboard (5).

10. A double-platform height-adjustable A-frame ladder according to claim 9, characterized in that: The pedal component (5) includes a pedal platform (51) fixedly connected to the top surface of the step (2), and a diagonal brace (52) is fixedly connected to the bottom of the pedal platform (51). One side of the diagonal brace (52) is fixedly connected to the side wall of the step (2).

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