Multi-layer folding and lifting fire station emergency rescue ladder
Patent Information
- Application Number
- CN202522020040.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0002]目前主流折叠梯的铰链通常采用圆形中空杆体设计，其连接孔削弱了杆体抗弯能力，当负载超过150kg时，铰链易发生横向偏移甚至断裂，例如，伸缩杆的连接孔导致局部应力集中，在侧向力作用下，圆形杆体的抗扭强度仅为矩形杆体的60%，这种结构缺陷在GB12142-2007标准中被重点指出，要求铰链需通过5倍额定载荷（750kg）的静态测试，纵向锁定机制不可靠多数产品依赖简单卡扣实现纵向锁定，缺乏冗余安全设计；
（1）、该多层折叠升降消防站应急救援登高梯，弹簧与挡块的联动设计，以及等边三角形挡块的横向限位，形成三维锁定结构，确保臂架在负载下不会滑动或翻转，稳定性优于传统铰链连接；防滑垫1采用高密度聚乙烯（HDPE）或铝合金材质，表面防滑纹结合防滑槽的导流设计，在湿滑地面仍能保持摩擦系数≥0.8，有效防止登高梯侧滑；轻质踩台板采用中空塑料或铝合金，在保证承重能力（单级≥200kg）的同时，整体重量降低30%以上，便于单人搬运和快速部署。
Smart Images
Figure CN224834874U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of emergency rescue equipment technology, and in particular to a multi-layer folding lifting fire station emergency rescue ladder. Background Technology
[0002] Currently, the hinges of mainstream folding ladders usually adopt a circular hollow rod design. The connection holes weaken the bending resistance of the rod. When the load exceeds 150kg, the hinge is prone to lateral displacement or even breakage. For example, the connection holes of the telescopic rod cause local stress concentration. Under the action of lateral force, the torsional strength of the circular rod is only 60% of that of the rectangular rod. This structural defect is highlighted in the GB12142-2007 standard, which requires the hinge to pass a static test of 5 times the rated load (750kg). The longitudinal locking mechanism is unreliable. Most products rely on simple buckles to achieve longitudinal locking, lacking redundant safety design. On slippery surfaces or sloping terrain, the latches are prone to disengagement due to vibration or lateral forces. For example, in the ISO14122 anti-slip test, a certain brand of folding ladder had a 37% probability of latch disengagement when tilted at 15°. This design cannot meet the "double locking" requirement (main lock + auxiliary lock) in the EN131 standard. The lack of a three-dimensional support system means that single / two-section ladders are only supported by two points at the bottom and lack a lateral anti-overturning structure. When working at a height of more than 10 meters, wind load and human swaying can cause the ladder to shift laterally by more than 15cm. For example, in a rescue scenario, a traditional folding ladder swayed by 22cm in a level 6 wind (wind speed 10.8m / s), far exceeding the 0.3% height deformation threshold specified in GB7059-2007 (3cm is allowed for a 10-meter ladder). Utility Model Content
[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a multi-layer folding lifting fire station emergency rescue ladder that can solve the above-mentioned problems.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer folding lifting fire station emergency rescue ladder, including an anti-slip mat, an anti-slip groove on the surface of the anti-slip mat, a first-stage boom installed in the anti-slip groove, and a lightweight platform fixedly connected between the first-stage booms; The bottom of the primary boom is provided with a sliding groove, and an elastic slider is slidably connected inside the sliding groove; a longitudinal installation sliding groove is provided on one side of the primary boom, and a transverse installation sliding groove is provided at the end of the primary boom away from the anti-slip pad, and the transverse installation sliding groove and the longitudinal installation sliding groove are interconnected. A groove is provided at the junction of the longitudinal installation groove and the transverse installation groove. A spring is fixedly connected inside the groove, and a telescopic rod is fixedly connected to the center of the spring. The telescopic rod is fixedly connected to the inner wall of the groove. The end of the spring away from the groove is fixedly connected to a stop block, and the stop block is slidably connected to the groove; an elastic connecting rod is fixedly connected to the outer edge of the longitudinal mounting groove and the bottom of the transverse mounting groove at the corresponding positions, and an equilateral triangular stop block is rotatably connected to the surface of the elastic connecting rod. The second-stage boom is movably installed at the end of the first-stage boom away from the anti-slip pad. A longitudinal connector that mates with a longitudinal mounting groove is fixedly connected to one side of the second-stage boom, and a transverse connector that mates with a transverse mounting groove is fixedly connected to the bottom of the second-stage boom. The structure of each subsequent boom stage is the same as that of the second-stage boom.
[0005] Preferably, the anti-slip groove is fixedly connected with anti-slip patterns.
[0006] Preferably, only two lightweight platform plates are provided in each level of the frame.
[0007] Preferably, the groove is T-shaped, and the shape of the connection between the stop and the spring is designed to match the groove.
[0008] Preferably, the stop block is set as a right-angled triangle at one end of the longitudinal mounting groove, and its bottom is flush with the top of the transverse mounting groove.
[0009] Preferably, the equilateral triangular stop block is set at the same height as the transverse mounting groove.
[0010] Preferably, the structure at the junction of the longitudinal and transverse mounting grooves of the secondary boom is the same as the corresponding mounting structure of the primary boom.
[0011] Preferably, each subsequent boom is connected to the longitudinal and transverse mounting grooves of the previous boom through corresponding longitudinal and transverse connectors, and the locking structure of each boom level is consistent with the locking structure of the first boom level.
[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) The multi-layer folding lifting fire station emergency rescue ladder has a linkage design of spring and block, and a lateral limit of equilateral triangle block to form a three-dimensional locking structure, which ensures that the boom will not slide or flip under load, and its stability is better than that of traditional hinge connection; the anti-slip mat 1 is made of high-density polyethylene (HDPE) or aluminum alloy, and the surface anti-slip texture combined with the anti-slip groove guide design can maintain a friction coefficient ≥0.8 on wet and slippery ground, effectively preventing the ladder from sliding side; the lightweight platform is made of hollow plastic or aluminum alloy, which reduces the overall weight by more than 30% while ensuring the load-bearing capacity (single level ≥200kg), making it easy for a single person to carry and deploy quickly.
[0013] (2) The multi-layer folding lifting fire station emergency rescue ladder has elastic sliders and springs that provide cushioning during sliding to avoid violent collisions of the boom; the telescopic rod absorbs part of the impact force through elastic deformation when locked, reducing structural stress. By continuously sliding the boom and locking it, the height can be precisely adjusted (e.g., from 3 meters to 15 meters) to adapt to different rescue scenarios, such as window rescue in high-rise buildings or operation in narrow spaces. Each component adopts a standardized design and can be quickly disassembled and replaced to reduce maintenance costs. For example, the anti-slip mat and the stepping plate can be replaced separately to avoid overall scrapping. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of a multi-layer folding lifting fire station emergency rescue ladder according to the present invention; Figure 2 This is a schematic diagram of a multi-layer folding lifting fire station emergency rescue ladder according to the present invention; Figure 3 In this utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of a multi-layer folding lifting fire station emergency rescue ladder according to the present invention.
[0015] Reference numerals: 1. Anti-slip mat; 2. Primary boom; 3. Lightweight platform; 4. Longitudinal connector; 5. Lateral connector; 6. Longitudinal mounting groove; 7. Lateral mounting groove; 8. Elastic slider; 9. Anti-slip texture; 10. Anti-slip groove; 11. Spring; 12. Stop; 13. Equilateral triangular stop; 14. Telescopic rod; 15. Elastic connecting rod; 16. Groove; 17. Recess; 18. Secondary boom. Detailed Implementation
[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.
[0018] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0020] Please see Figure 1-4 This utility model provides a technical solution: a multi-layer folding lifting fire station emergency rescue ladder includes an anti-slip mat 1, the surface of the anti-slip mat 1 is provided with anti-slip grooves 10, and anti-slip patterns 9 are fixedly connected inside the anti-slip grooves 10; A primary boom 2 is installed inside the anti-slip groove 10. Lightweight stepping plates 3 are fixedly connected between the primary booms 2. Only two lightweight stepping plates 3 are set in each boom level. The bottom of the primary boom 2 is provided with a sliding groove 16, and an elastic slider 8 is slidably connected inside the sliding groove 16. A longitudinal mounting groove 6 is provided on one side of the primary boom 2, and a transverse mounting groove 7 is provided at the end of the primary boom 2 away from the anti-slip pad 1. The transverse mounting groove 7 and the longitudinal mounting groove 6 are interconnected. A groove 17 is provided at the junction of the longitudinal installation groove 6 and the transverse installation groove 7. The groove 17 is T-shaped. A spring 11 is fixedly connected inside the groove 17. A telescopic rod 14 is fixedly connected to the center of the spring 11. The telescopic rod 14 is fixedly connected to the inner wall of the groove 17. A stop block 12 is fixedly connected to the end of the spring 11 away from the groove 17. The shape of the stop block 12 at the connection point with the spring 11 is designed to match the groove 17 and slide with it. One end of the stop block 12 at the longitudinal mounting groove 6 is a right-angled triangle, and its bottom is flush with the top of the transverse mounting groove 7. An elastic connecting rod 15 is fixedly connected to the outer edge of the longitudinal mounting groove 6 at the corresponding position of the bottom of the transverse mounting groove 7. An equilateral triangular stop 13 is rotatably connected to the surface of the elastic connecting rod 15. The equilateral triangular stop 13 is set at the same height as the transverse mounting groove 7. The secondary boom 18 is movably installed at the end of the primary boom 2 away from the anti-slip pad 1. A longitudinal connector 4 is fixedly connected to one side of the secondary boom 18, and the longitudinal connector 4 cooperates with the longitudinal mounting groove 6. The bottom of the secondary boom 18 is fixedly connected to a horizontal connector 5, which cooperates with the horizontal mounting groove 7. The longitudinal installation groove 6 and the transverse installation groove 7 of the secondary boom 18 are connected at the same point as the installation of the primary boom 2. After that, each subsequent boom stage is the same as the secondary boom 18. Working principle: The anti-slip mat 1 fits tightly against the ground through the anti-slip grooves 10 at the bottom, and the internal anti-slip textures 9 further increase friction, ensuring the stability of the ladder during deployment and use. The anti-slip mat 1 serves as the base of the entire structure, providing vertical support for the multi-stage boom. The groove 16 at the bottom of the first-stage boom 2 cooperates with the elastic slider 8, allowing the boom to slide in the horizontal direction. The elastic deformation of the elastic slider 8 provides sliding damping to prevent the boom from sliding freely. At the same time, after sliding into place, the elastic force assists in positioning. The secondary boom 18 is embedded in the longitudinal mounting groove 6 and the transverse mounting groove 7 of the primary boom 2 through the longitudinal connector 4 and the transverse connector 5, respectively. When the connector is fully inserted, the stop block 12 pops out under the action of the spring 11, and its right-angled triangular end is locked into the corresponding groove 17 of the secondary boom to form a longitudinal lock. At the same time, the equilateral triangular stop block 13 rotates to the top of the transverse mounting groove 7 under the elastic force of the elastic connecting rod 15, and cooperates with the transverse connector 5 to achieve a transverse lock. The installation of each subsequent boom stage repeats the above process, achieving step-by-step locking through the spring-stop linkage mechanism to form a stable multi-layer support structure. The telescopic rod 14 stores elastic potential energy when the spring 11 is compressed, further enhancing the reliability of the locking. By pulling or pushing the boom, the elastic slider 8 slides in the groove 16, while the spring 11 is compressed or released to adjust the extension length of the boom. When the target height is reached, the stop block 12 and the equilateral triangular stop block 13 automatically engage in the corresponding positions to complete the height locking.
[0021] Press the stop block 12 to retract it into the groove 17, and at the same time rotate the equilateral triangle stop block 13 to disengage it from the transverse connector 5. The secondary boom 18 can then slide along the slide grooves 6 and 7 back into the primary boom 2. Repeating this operation can fold the multi-stage boom layer by layer, and finally store it into a compact structure. The linkage design of spring 11 and stop 12, and the lateral limiting of equilateral triangular stop 13, form a three-dimensional locking structure to ensure that the boom will not slide or overturn under load, and its stability is better than that of traditional hinge connection. The anti-slip mat 1 is made of high-density polyethylene (HDPE) or aluminum alloy. The surface anti-slip texture 9 combined with the anti-slip groove 10 has a flow-guiding design, which can maintain a friction coefficient of ≥0.8 on wet and slippery surfaces, effectively preventing the ladder from slipping. The lightweight platform 3 is made of hollow plastic or aluminum alloy, which reduces the overall weight by more than 30% while ensuring load-bearing capacity (single level ≥200kg), making it easy for one person to move and deploy quickly. The multi-stage boom can be completely nested and stored, and its folded volume is only 1 / 5 of its unfolded state, making it suitable for loading onto fire trucks or emergency rescue vehicles and saving transportation space. The elastic slider 8 and spring 11 provide cushioning during sliding to prevent the boom from colliding violently; the telescopic rod 14 absorbs part of the impact force through elastic deformation when locked, reducing structural stress. By continuously sliding and locking the boom, the height can be precisely adjusted (e.g., from 3 meters to 15 meters) to adapt to different rescue scenarios, such as window rescue in high-rise buildings or operation in confined spaces. Each component adopts a standardized design, allowing for quick disassembly and replacement, thus reducing maintenance costs. For example, the anti-slip mat 1 and the platform 3 can be replaced individually, avoiding the need for complete replacement. The main structural components are made of galvanized steel or engineering plastics, and the surface is coated with an anti-rust coating. They can be used for a long time in harsh environments such as humidity and salt spray, with a service life of more than 10 years. It takes only 20 seconds to fully unfold from the folded state. When combined with the automatic ladder system of the fire truck (as described in Abstract 12), it can be used immediately after stopping, thus shortening the rescue response time. In addition to vertical ascent, the boom can be installed at an angle (≤15°), and with the biomimetic texture design of the anti-slip mat, it is suitable for complex terrains such as slopes and steps.
[0022] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A multi-layer folding lifting fire station emergency rescue ladder, comprising an anti-slip mat (1), characterized in that: The surface of the anti-slip mat (1) is provided with anti-slip grooves (10), and a primary boom (2) is installed in the anti-slip grooves (10). A lightweight platform (3) is fixedly connected between the primary booms (2). The bottom of the primary boom (2) is provided with a sliding groove (16), and an elastic slider (8) is slidably connected inside the sliding groove (16). The first-stage boom (2) has a longitudinal mounting groove (6) on one side and a transverse mounting groove (7) at the end of the first-stage boom (2) away from the anti-slip pad (1). The transverse mounting groove (7) and the longitudinal mounting groove (6) are interconnected. A groove (17) is provided at the junction of the longitudinal mounting groove (6) and the transverse mounting groove (7). A spring (11) is fixedly connected inside the groove (17). A telescopic rod (14) is fixedly connected to the center of the spring (11). The telescopic rod (14) is fixedly connected to the inner wall of the groove (17). A stop block (12) is fixedly connected to one end of the spring (11) away from the groove (17), and the stop block (12) is slidably connected to the groove (17); An elastic connecting rod (15) is fixedly connected to the outer edge of the longitudinal mounting groove (6) and the bottom of the transverse mounting groove (7). An equilateral triangular stop block (13) is rotatably connected to the surface of the elastic connecting rod (15). The first-stage boom (2) is movably mounted with a second-stage boom (18) at the end away from the anti-slip pad (1). A longitudinal connector (4) that cooperates with the longitudinal mounting groove (6) is fixedly connected to one side of the second-stage boom (18). A transverse connector (5) that cooperates with the transverse mounting groove (7) is fixedly connected to the bottom of the second-stage boom (18). The structure of each subsequent boom level is the same as that of the second-level boom (18).
2. The multi-layer folding lifting fire station emergency rescue ladder according to claim 1, characterized in that: The anti-slip groove (10) is fixedly connected with anti-slip texture (9).
3. The multi-layer folding lifting fire station emergency rescue ladder according to claim 2, characterized in that: Only two of the lightweight platform (3) are installed in each level of the frame.
4. The multi-layer folding lifting fire station emergency rescue ladder according to claim 3, characterized in that: The groove (17) is T-shaped, and the shape of the connection between the stop (12) and the spring (11) is set to match the groove (17).
5. The multi-layer folding lifting fire station emergency rescue ladder according to claim 4, characterized in that: The stop (12) is set as a right triangle at one end of the longitudinal mounting groove (6), and its bottom is flush with the top of the transverse mounting groove (7).
6. The multi-layer folding lifting fire station emergency rescue ladder according to claim 5, characterized in that: The equilateral triangular stop (13) is set at the same height as the transverse mounting groove (7).
7. The multi-layer folding lifting fire station emergency rescue ladder according to claim 6, characterized in that: The structure at the junction of the longitudinal mounting groove (6) and the transverse mounting groove (7) of the secondary boom (18) is the same as the corresponding installation structure of the primary boom (2).
8. The multi-layer folding lifting fire station emergency rescue ladder according to claim 7, characterized in that: Each subsequent boom is connected to the longitudinal and transverse mounting grooves of the previous boom through corresponding longitudinal and transverse connectors, and the locking structure of each boom is consistent with the locking structure of the first boom (2).