Follow-up telescopic ladder and liftable platform assembly

Abstract

The utility model provides a kind of servo telescopic ladder stand and liftable platform assembly.Servo telescopic ladder stand includes fixed section and telescopic section.Fixed section is used to connect to liftable platform.Telescopic section is connected to fixed section, and telescopic section includes several stages, and stage is sequentially slidably connected along height direction by sliding guide mechanism. Among them, the sliding cooperation of sliding guide mechanism between adjacent stages makes telescopic section have the first state that stage tends to elongate due to self-weight, and the second state that stage is shortened due to external thrust and superimposed on each other.According to the automatic telescopic ladder stand of the scheme, it automatically elongates as the platform rises, and automatically shortens as the platform descends, always maintains appropriate contact with the ground, and ensures the normal function of ladder stand.

Description

Technical Field

[0001] This utility model relates to the field of container equipment technology, and more specifically to a follow-up telescopic ladder and lifting platform assembly. Background Technology

[0002] In the assembly of containers, especially refrigerated containers, liftable work platforms are required to facilitate assembly work. With existing technology, if the ladder rises and falls with the platform, a gap is created between the ladder and the ground, making it impossible for personnel to ascend or descend. If the ladder is hinged to the platform, it tilts during platform movement, also rendering it unusable. The platform's movement affects the ladder's functionality, causing inconvenience and safety hazards during container assembly.

[0003] Therefore, there is a need to provide a follow-up telescopic ladder and a liftable platform assembly to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the first aspect of this utility model provides a follow-up telescopic ladder for a liftable platform, comprising: A fixed section is used to connect to the liftable platform; The telescopic section is connected to the fixed section. The telescopic section includes several stage steps, which are sequentially slidably connected along the height direction via a sliding guide mechanism. The sliding guide mechanism allows the telescopic segment to have a first state where it tends to elongate due to the weight of the stage itself, and a second state where the stages are stacked together due to external thrust, through the sliding engagement between adjacent stage segments.

[0006] According to the first aspect of this utility model, the automatically retractable ladder ensures a fixed connection between the upper end of the ladder and the platform through a fixed section, maintaining overall stability. The multi-stage retractable combination solves the problem of ladder length matching during platform lifting and lowering. A sliding guide mechanism provides a stable sliding path, ensuring smooth relative movement of each retractable step and preventing jamming and swaying. The automatically retractable ladder according to this solution automatically extends as the platform rises and automatically shortens as the platform descends, always maintaining proper contact with the ground and ensuring normal ladder function.

[0007] Optionally, the sliding guide mechanism includes: A slide rail is provided in one of an adjacent upper stage and a lower stage, the slide rail extending along the height direction; A slider is located in one of the adjacent upper stage and lower stage, and the slider is slidably connected to the slide rail.

[0008] Optionally, each of the slide rails is provided with at least two sliders; the at least two sliders are arranged at intervals along the height direction.

[0009] Optionally, the sliding guide mechanism is further provided with a limiting structure to limit the maximum extension stroke and the maximum shortening stroke between adjacent stage stages.

[0010] Optionally, the lowest level of the platform stage may also be provided with steps, the height of which is lower than the height of the lowest level of the platform stage.

[0011] Optionally, a buffer section is provided at the bottom of the lowest stage.

[0012] Optionally, the number of stages is 3 to 7.

[0013] Optionally, each stage of the platform is provided with an anti-slip section at its top.

[0014] Optionally, the telescopic ladder further includes guardrails corresponding to the number of platform stages, the guardrails being connected to the corresponding platform stages and rising and falling synchronously with the platform stages.

[0015] The second aspect of this utility model provides a liftable platform assembly, comprising: The main body of the platform is capable of lifting and lowering. A fixed ladder is fixedly connected to the platform body and can move with the platform body. In the aforementioned telescopic ladder, the fixed section is fixedly connected to the fixed ladder and can move with the movement of the platform body.

[0016] The liftable platform component according to the second aspect of this utility model retains the stability of a fixed ladder while achieving length self-adaptation through a follow-up telescopic ladder, making it suitable for various lifting scenarios. Attached Figure Description

[0017] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings, Figure 1 This is a three-dimensional schematic diagram of a preferred embodiment of the present invention: a telescopic climbing ladder. Figure 2 This is a side view of a preferred embodiment of the telescopic climbing ladder of the present invention. Figure 3 This is a schematic diagram of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of Embodiment 3 of the present invention; Figure 6 This is a schematic diagram of Embodiment 4 of the present invention; Figure 7 This is a three-dimensional schematic diagram of a preferred embodiment of the liftable platform component of the present invention. Figure 8 This is a side view of a preferred embodiment of the liftable platform assembly of the present invention. Figure 9 This is a top view schematic diagram of a preferred embodiment of the liftable platform component of this utility model; Figure 10 This is a front view schematic diagram of a lifting platform component according to a preferred embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures 1: Telescopic ladder 10: Fixed Section 20: Expansion Section 21: Taiwan Stage 22: Stepping 23: Guardrail 30: Sliding guide mechanism 31: Slide rail 32: Slider 2: Platform Main Body 3: Fixed ladder DH: Altitude direction. Detailed Implementation

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0021] In this document, ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0022] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0023] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0024] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0025] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0026] Reference Figures 1 to 2 This utility model provides a follow-up telescopic ladder 1. The follow-up telescopic ladder 1 can be used in a liftable platform.

[0027] The telescopic ladder 1 includes a fixed section 10 and a telescopic section 20. The fixed section 10 is connected to a liftable platform. The telescopic section 20 is connected to the fixed section 10 and includes several platform stages 21. The platform stages 21 are sequentially connected along the height direction DH via a sliding guide mechanism 30. Adjacent platform stages 21 are slidably connected via the sliding guide mechanism 30, allowing the telescopic section 20 to have a first state where it tends to extend due to its own weight, and a second state where it is shortened due to external thrust, causing the platform stages 21 to overlap. According to this design, the automatically telescopic ladder automatically extends as the platform rises and automatically shortens as the platform descends, always maintaining proper contact with the ground to ensure normal ladder function.

[0028] The fixed section 10 is made of metal and has sufficient strength and rigidity to withstand the load of the ladder. The fixed section 10 can be a plate-like structure or a block-like structure. The fixed section 10 can be fixed to the external structure by bolts or welding. Optionally, the fixed section 10 can be directly fixed to the main structure of the lifting platform or fixed to an existing fixed ladder on the platform. The fixed section 10 ensures that the telescopic ladder 1 can move synchronously with the platform, guaranteeing the stability of relative displacement.

[0029] The telescopic section 20 consists of multiple platform stages 21, which are typically stepped structures to facilitate climbing. The number of platform stages 21 can be set according to actual needs; for example, the number of platform stages 21 is 3 to 7. Too many stages will increase structural complexity and cost, while too few stages may limit the telescopic range. In the description of this utility model, unless otherwise stated, the terms "upper platform stage 21" and "lower platform stage 21" are relative to the fixed end of the ladder and the direction of gravity: the upper platform stage 21 refers to the platform stage 21 in the telescopic section 20 that is closer to the fixed section 10 (i.e., closer to the lifting platform); the lower platform stage 21 refers to the platform stage 21 in the telescopic section 20 that is further away from the fixed section 10 (i.e., closer to the ground).

[0030] The telescopic section 20 is formed by multiple platform stages 21 that are sequentially slidably connected along the height direction DH (i.e., the longitudinal direction of the ladder) via a sliding guide mechanism 30. Adjacent platform stages 21 can slide relative to each other.

[0031] The first state, where the platform stage 21 tends to elongate due to its own weight: When the platform rises, the fixed section 10 is lifted. At this time, the lowest platform stage 21 tends to move downward due to gravity, but since its bottom is supported by the ground, this tendency is transformed into a force that drives each level of platform stage 21 to slide downward relative to each other along the sliding guide mechanism 30, thereby causing the telescopic section 20 to elongate as a whole, filling the space created after the platform rises and maintaining the integrity of the climbing ladder function.

[0032] The second shortened state, where the platform stages 21 are stacked together due to external thrust: When the platform descends, the fixed section 10 presses down. The bottom of the lowest platform stage 21 contacts the ground first, and the ground gives it an upward reaction force (i.e., external thrust). This thrust forces each stage stage 21 to slide upward relative to each other along the sliding guide mechanism 30, thereby shortening the telescopic section 20 as a whole and stacking it together, avoiding structural damage caused by excessive length pressing against the ground.

[0033] The sliding guide mechanism 30 enables relative sliding between adjacent platform stages 21. The sliding guide mechanism 30 includes a slide rail 31 and a slider 32. The slide rail 31 extends along the height direction DH, and the slider 32 is slidably connected to the slide rail 31. The slide rail 31 and slider 32 can be respectively disposed on adjacent upper and lower platform stages 21. Optionally, the sliding guide mechanism 30 is an external guide rail type, with both the slide rail 31 and slider 32 disposed on the outer side wall of the platform stage 21. In an embodiment not shown in the figures, the sliding guide mechanism 30 can also be an embedded concealed type, embedded and concealed inside the platform stage, making the ladder appearance neater and the track less susceptible to corrosion or damage from the external environment. Those skilled in the art should understand that the protection scope of this utility model is not limited to the specific structural forms described above. Any sliding guide mechanism 30 capable of achieving the function of "causing relative sliding between adjacent platform stages 21 along the height direction DH" falls within the protection scope of this utility model.

[0034] In some embodiments, the slide rail 31 is fixedly disposed on the side or inside of the upper stage 21 and extends along the height direction DH. The corresponding slider 32 is disposed on the lower stage 21. When the two stages 21 move relative to each other, the slider 32 slides along the slide rail 31.

[0035] In other embodiments, the slide rail 31 is fixedly mounted on the lower stage 21, while the slider 32 is mounted on the upper stage 21. In this embodiment, the slide rail 31 may protrude from the upper surface of the stage 21. These two mounting methods are functionally equivalent and both can achieve stable guiding sliding. Those skilled in the art can choose according to the actual structure and process requirements.

[0036] Optionally, at least two sliders 32 are provided on each slide rail 31. These two sliders 32 are arranged at a certain distance along the height direction DH of the slide rail 31. The two spaced sliders 32 can form two support points to prevent the stage 21 from swaying during the extension and retraction process.

[0037] The term "slider 32" is a broad functional term encompassing various specific structures capable of achieving linear guided sliding. In a preferred embodiment, the slider 32 can specifically be a roller. The roller is rotatably mounted on the lower or upper stage 21 via a wheel axle. The rim of the roller contacts the surface of the slide rail 31. The friction between the roller and the slide rail 31 is rolling friction, which has a much lower frictional resistance than sliding friction. This makes the extension and retraction movement of the ladder easier and more flexible. Simultaneously, it reduces wear between the slide rail 31 and the roller, improving the service life and reliability of the entire sliding guide mechanism 30.

[0038] Optionally, the sliding guide mechanism 30 is further provided with a limiting structure to limit the maximum extension and maximum retraction stroke between adjacent stage steps 21. The limiting structure can be a mechanical stop, a limiting pin, or a flange, etc. For example, a stop is provided at the end of the slide rail 31, stopping the slide block 32 when it reaches the stop position, preventing the stage step 21 from disengaging. The limiting structure ensures that the ladder operates within a safe range, avoiding damage caused by excessive extension and retraction.

[0039] Optionally, the lowest platform stage 21 is also equipped with steps 22, which are lower than the height of the lowest platform stage 21. Steps 22 provide a lower intermediate transition point. People can step on steps 22 first and then climb to the lowest platform stage 21, or vice versa, dividing the descent process into two steps, greatly reducing the height of a single step and making climbing up and down the ladder more effortless and comfortable.

[0040] Optionally, a buffer section is provided at the bottom of the lowest platform stage 21. The buffer section can be a cushioning pad, used to absorb the impact energy when the ladder contacts the ground, reducing noise and vibration.

[0041] Optionally, an anti-slip part is provided at the top (i.e., the foot surface) of each step 21. The anti-slip part can be a textured surface formed by direct stamping, a welded anti-slip strip, or an adhesive anti-slip mat. Its function is to increase the friction between the sole of the shoe and the foot surface, preventing people from slipping.

[0042] Optionally, the ladder also includes guardrails 23 corresponding to the number of platform stages 21. The guardrails 23 are connected to the corresponding platform stages 21 and rise and fall synchronously with them. The guardrails 23 are typically made of steel pipes, with a height that meets safety standards, providing lateral protection for personnel. Each section of guardrail 23 can be relatively independent or connected by hinges or sliding connections.

[0043] The following detailed description takes a telescopic ladder including four stages as an example. The telescopic ladder sequentially consists of, from top to bottom: a first stage 21a, a second stage 21b, a third stage 21c, and a fourth stage 21d. Each stage has a self-height of H. The "first state" refers to that the stage 21 is fully extended relative to its upper stage; the "second state" refers to that the stage 21 is fully retracted relative to its upper stage.

[0044] Embodiment 1: With reference to Figure 3 , this embodiment corresponds to the scenario where the platform is at the lowest working position, and the total required height of the ladder at this time is approximately H. In this state, the second stage 21b is in the second state, and slides entirely to be stacked on the first stage 21a. The third stage 21c is also in the second state, and is stacked together with the second stage 21b. The fourth stage 21d is in the second state, and is fully stacked along with the third stage 21c. At this time, the entire telescopic ladder presents the shortest stowed configuration with the most compact structure.

[0045] Embodiment 2: With reference to Figure 4 , this embodiment corresponds to the scenario where the platform is at the medium-low working position, and the total required height of the ladder at this time is approximately 2H. In this state, the second stage 21b is in the first state, slides downward from the first stage 21a and is fully extended, extending the effective length of the ladder by the height of one stage. The third stage 21c is in the second state, slides entirely to be stacked with the second stage 21b. The fourth stage 21d is in the second state, and is stacked together with the third stage 21c.

[0046] Embodiment 3: With reference to Figure 5 , this embodiment corresponds to the scenario where the platform is at the medium working position, and its total height is between 2H and 3H (for example, 2H+ΔH, where 0<ΔH<H). In this state, the second stage 21b is in the first state and remains fully extended. The third stage 21c is in an intermediate state between the first state and the second state, that is, a partially extended state. The fourth stage 21d is in the second state and is stacked with the third stage 21c. Specifically, the third stage 21c does not slide out completely from its upper stage, the second stage 21b, but only extends a portion with a height of ΔH, and the bottom thereof is in contact with the ground. This state demonstrates the capability of the sliding guide mechanism to allow the lower stage to hover at any position, enabling the telescopic ladder to flexibly and accurately adapt to various non-standard total height requirements, without the need to strictly lock the platform at specific gears.

[0047] Embodiment 4: With reference to Figure 6In this embodiment, the platform is in its highest working position, requiring a total ladder height of approximately 4H. In this state, the second platform stage 21b is in its first state, fully extended. The third platform stage 21c is in its first state, fully extended. The fourth platform stage 21d is in its first state, sliding down from the third platform stage 21c to its limit point and fully extended. At this point, all four platform stages are in their fully extended first state, the telescopic ladder reaches its maximum design length, and the bottom support feet of the fourth platform stage 21d contact the ground, providing stable support.

[0048] Reference Figures 7 to 10 This utility model also provides a liftable platform component, including a platform body 2, a fixed ladder 3 fixedly connected to the platform body 2, and a telescopic ladder 1 as described above. The fixed section 10 of the telescopic ladder 1 is fixedly connected to the lower end of the fixed ladder 3. When the entire platform system is in operation, the platform body 2 rises and falls, causing the fixed ladder 3 and the telescopic ladder 1 to move together, while the telescopic section 20 adaptively adjusts its length without manual adjustment, improving safety and efficiency. This solution retains the stability of the fixed ladder 3 and achieves length self-adaptation through the telescopic ladder 1, making it suitable for various lifting scenarios.

[0049] Optionally, the lifting movement of the platform body 2 can be achieved by hydraulic, electric lead screw, gear rack or scissor mechanism.

[0050] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0051] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A follow-up telescopic ladder for a liftable platform, characterized in that, include: A fixed section is used to connect to the liftable platform; The telescopic section is connected to the fixed section. The telescopic section includes several stage steps, which are sequentially slidably connected along the height direction via a sliding guide mechanism. The sliding guide mechanism allows the telescopic segment to have a first state where it tends to elongate due to the weight of the stage itself, and a second state where the stages are stacked together due to external thrust, through the sliding engagement between adjacent stage segments.

2. The follow-up telescopic ladder according to claim 1, characterized in that, The sliding guide mechanism includes: A slide rail is provided in one of an adjacent upper stage and a lower stage, the slide rail extending along the height direction; A slider is located in one of the adjacent upper stage and lower stage, and the slider is slidably connected to the slide rail.

3. The follow-up telescopic ladder according to claim 2, characterized in that, Each of the slide rails is provided with at least two sliders; the at least two sliders are arranged at intervals along the height direction.

4. The follow-up telescopic ladder according to claim 1, characterized in that, The sliding guide mechanism is also provided with a limiting structure to limit the maximum extension stroke and the maximum shortening stroke between adjacent stage stages.

5. The follow-up telescopic ladder according to claim 1, characterized in that, The lowest level of the platform is also provided with steps, the height of which is lower than the height of the lowest level of the platform.

6. The follow-up telescopic ladder according to claim 1, characterized in that, The bottom of the lowest stage is provided with a buffer section.

7. The follow-up telescopic ladder according to claim 1, characterized in that, The number of stages is 3 to 7.

8. The follow-up telescopic ladder according to claim 1, characterized in that, Each stage of the platform is equipped with an anti-slip section at its top.

9. The follow-up telescopic ladder according to claim 1, characterized in that, The telescopic ladder also includes guardrails corresponding to the number of platform stages. The guardrails are connected to the corresponding platform stages and rise and fall synchronously with the platform stages.

10. A lifting platform assembly, characterized in that, include: The main body of the platform is capable of lifting and lowering. A fixed ladder is fixedly connected to the platform body and can move with the platform body. According to any one of claims 1 to 9, the fixed section is fixedly connected to the fixed ladder and is movable as the platform body moves.

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