Overhanging type safety crawling ladder for building deep foundation pit
By designing a cantilever safety ladder, using cantilever support frames and multiple support platforms, the existing ladders are easily flipped and have no mid-way rest, achieving higher safety and convenience.
Patent Information
- Application Number
- CN202422154374.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The ladder for the deep foundation pit construction of existing buildings is difficult to fix and is easy to flip, and the structure is straight up and down, so the construction personnel cannot rest halfway and are prone to falling due to exhaustion.
A cantilever safety ladder is designed, including a first support platform, a second support platform and a third support platform. A cantilever support frame is fixed at the bottom. The first ladder is connected between the top of the first support platform and the top of the third support platform, and the second ladder is connected between the top of the second support platform and the top of the third support platform, increasing the anti-flip capability and providing a mid-way rest platform.
Through the reaction force between the cantilever support frame and the support beam, stable support is provided to avoid ladder flip; at the same time, multiple support platforms and gentle slope ladder designs slow down the steepness of crawling, making it easier for construction personnel to crawl safely.
Smart Images
Figure CN223034488U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and particularly relates to a cantilever safety climbing ladder for a deep building foundation pit. Background Art
[0002] A foundation pit refers to the space below the ground excavated for the construction of the foundation and basement of a building (including a structure); in the modern building construction industry, when construction workers at the interlayer of the foundation pit support beam want to move between adjacent interlayers of the foundation pit support beam, a simple climbing ladder is usually erected between the adjacent interlayers of the foundation pit support beam. It is difficult to fix the climbing ladder well with the support beam, and it is easy to turn over under the action of external force; at the same time, the climbing ladder has a straight-up-and-down structure, and construction workers need to climb from the bottom of the ladder to the top at one time without being able to rest midway. If the construction workers are exhausted during the climbing process, it is easy to fall from the climbing ladder due to exhaustion, resulting in safety accidents. Content of the Utility Model
[0003] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide a cantilever safety climbing ladder for a deep building foundation pit, which enhances the anti-turning ability of the climbing ladder and enables construction workers to rest during the climbing process.
[0004] To solve the above technical problems, the technical scheme adopted by the utility model is: a cantilever safety climbing ladder for a deep building foundation pit, including a first support platform, a second support platform, and a third support platform located between the first support platform and the second support platform; cantilever support frames are fixedly arranged at the bottoms of the first support platform, the second support platform, and the third support platform; a first climbing ladder is connected between the top of the first support platform and the top of the third support platform, and a second climbing ladder is connected between the top of the second support platform and the top of the third support platform.
[0005] As a preferred scheme of the utility model, at least two transverse strengthening connecting rods are arranged between the first support platform and the third support platform, and the transverse strengthening connecting rods are vertically connected to the first support platform and the third support platform at both ends thereof.
[0006] As a preferred scheme of the utility model, the first support platform 1 is higher than the third support platform 3, and the third support platform 3 is higher than the second support platform.
[0007] As a preferred scheme of the utility model, the first support platform, the second support platform, and the third support platform all include a standing platform; the first support platform further includes a first support frame, and the third support platform further includes a second support frame, and the first support frame is higher than the second support frame.
[0008] As a preferred embodiment of the present utility model, the standing platform includes a bottom plate and four vertical guard bars, and the four vertical guard bars are respectively located at the four top corners of the bottom plate and are perpendicular to the bottom plate.
[0009] As a preferred embodiment of the present utility model, a plurality of horizontal guard bars are arranged on the periphery of the standing platform, and the horizontal guard bars are perpendicular to the vertical guard bars and fixedly connected to the vertical guard bars.
[0010] As a preferred embodiment of the present utility model, the cantilever support frame includes two parallel support members; each support member includes a cantilever main beam and a diagonal brace beam, and the diagonal brace beam is obliquely fixed on the cantilever main beam.
[0011] As a preferred embodiment of the present utility model, a cantilever horizontal fixing member is further provided between the cantilever support frames, and the cantilever horizontal fixing member is perpendicularly connected to the adjacent cantilever support frames.
[0012] As a preferred embodiment of the present utility model, first ladder support bars are fixedly arranged on both sides of the first ladder, and the ends of the first ladder support bars far from the first ladder are fixedly arranged on the cantilever support frame below the first support platform; second ladder support bars are fixedly arranged on both sides of the second ladder, and the ends of the second ladder support bars far from the second ladder are fixedly arranged on the cantilever support frame below the third support platform.
[0013] As a preferred embodiment of the present utility model, safety nets are hung on both sides of the first ladder and the second ladder.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: through the reaction force formed between the cantilever support frame and the support beam, stable support is provided for the cantilever safety ladder, avoiding the overturning of the cantilever safety ladder under the action of external forces; the first support platform, the second support platform and the third support platform provide a rest platform for the climbing personnel, and at the same time slow down the steepness of the connected ladders, facilitating the climbing of the climbing personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a front view of a cantilever safety ladder for a building deep foundation pit provided by an embodiment of the present application;
[0016] Figure 2 is a side view of a cantilever safety ladder for a building deep foundation pit provided by an embodiment of the present application;
[0017] Reference numerals: first support platform 1, first support frame 1-1, second support platform 2, third support platform 3, second support frame 3-1, cantilever support frame 4, support member 4-1, cantilever main beam 4-11, diagonal bracing beam 4-12, cantilever transverse fixing member 4-2, first ladder 5, first ladder support rod 5-1, second ladder 6, second ladder support rod 6-1, transverse reinforcement connecting rod 7, standing platform 8, bottom plate 8-1, guard vertical rod 8-2, guard cross bar 8-3, support beam a. Detailed implementation manners
[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.
[0019] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the scope of the content of the present application. Each example can appropriately omit, substitute, or add various processes or components. For example, the described methods can be executed in a different order from the described order, and various steps can be added, omitted, or combined. In addition, the features described in some examples can be combined into other examples.
[0020] Please refer to Figure 1 , Figure 1 , which shows a front view of a cantilever safety ladder for a building deep foundation pit provided by an embodiment of the present application. As Figure 1 shown, a cantilever safety ladder for a building deep foundation pit includes a first support platform 1, a second support platform 2, and a third support platform 3 located between the first support platform 1 and the second support platform 2; cantilever support frames 4 are fixedly provided at the bottoms of the first support platform 1, the second support platform 2, and the third support platform 3; a first ladder 5 is connected between the top ends of the first support platform 1 and the third support platform 3, and a second ladder 6 is connected between the top ends of the second support platform 2 and the third support platform 3.
[0021] Specifically, the bottom of the cantilever support frame 4 abuts against the side surface of the support beam a, and one end of the top of the cantilever support frame 4 adjacent to the support beam a is fixed to the support beam a by welding or bolt connection. When the cantilever safety ladder is subjected to an external force, the support beam a will exert a reaction force on the bottom of the cantilever support frame 4 to prevent the cantilever safety ladder from flipping with the fixed point as the rotation axis; the top end of the third support platform 3 is respectively connected to the first ladder 5 and the second ladder 6, reducing the steepness of the first ladder 5 and the second ladder 6. At the same time, the third support platform 3 provides a rest area for the climbing personnel, facilitating the climbing personnel to recover their strength.
[0022] Furthermore, the first support platform 1 is parallel to the upper support beam, the second support platform 2 is parallel to the lower support beam, and the cantilever safety climbing ladder is fixed to the lower support beam through the cantilever support frame 4.
[0023] As an option in the embodiment of the present application, at least two transverse strengthening connecting rods 7 are arranged between the first support platform 1 and the third support platform 3, and the transverse strengthening connecting rods 7 are perpendicularly connected to the first support platform 1 and the third support platform 3 at both ends thereof.
[0024] Reference can be made here Figure 1 . As Figure 1 shown, specifically, both ends of the transverse strengthening connecting rod 7 are fixedly connected to the first support frame 1-1 on the first support platform 1 and the second support frame 3-1 on the third support platform 3 respectively; the transverse strengthening connecting rod 7 fixes the first support platform 1 and the third support platform 3, increases the stability of the first support platform 1 and the third support platform 3, and prevents the first support platform 1 and the third support platform 3 from shaking when the climbing personnel are climbing.
[0025] As an option in the embodiment of the present application, the first support platform 1 is higher than the third support platform 3, and the third support platform 3 is higher than the second support platform 2.
[0026] Reference can be made here Figure 1 . As Figure 1 shown, specifically, both ends of the first climbing ladder 5 are connected to the top ends of the first support platform 1 and the third support platform 3 respectively, and the inclination angle of the first climbing ladder 5 is controlled by the heights of the first support platform 1 and the third support platform 3; both ends of the second climbing ladder 6 are connected to the top ends of the second support platform 2 and the third support platform 3 respectively, and the inclination angle of the second climbing ladder 6 is controlled by the heights of the second support platform 2 and the third support platform 3.
[0027] As an option in the embodiment of the present application, the first support platform 1, the second support platform 2 and the third support platform 3 all include a standing platform 8; the first support platform 1 further includes a first support frame 1-1, the third support platform 3 further includes a second support frame 3-1, and the first support frame 1-1 is higher than the second support frame 3-1.
[0028] Reference can be made here Figure 1 and Figure 2 . As Figure 1 and Figure 2As shown, specifically, the first support frame 1-1 on the first support platform 1 is fixedly connected to the cantilever support frame 4 below the first support platform 1, and the standing platform 8 on the first support platform 1 is fixedly connected to the first support frame 1-1; the second support frame 3-1 on the third support platform 3 is fixedly connected to the cantilever support frame 4 below the third support platform 3, and the standing platform 8 on the third support platform 3 is fixedly connected to the second support frame 3-1; the standing platform 8 on the second support platform 2 is directly fixedly connected to the cantilever support frame 4 below the second support platform 2.
[0029] As an option in the embodiment of the present application, the standing platform 8 includes a bottom plate 8-1 and four guard vertical bars 8-2. The four guard vertical bars 8-2 are respectively located at the four top corners of the bottom plate 8-1 and are perpendicular to the bottom plate 8-1; a plurality of guard horizontal bars 8-3 are arranged on the periphery of the standing platform 8. The guard horizontal bars 8-3 are perpendicular to the guard vertical bars 8-2 and are fixedly connected to the guard vertical bars 8-2.
[0030] Reference can be made here Figure 2 . As Figure 2 shown, specifically, the bottom plate 8-1 can adopt patterned steel plate to increase the anti-slip effect of the bottom plate 8-1; the guard vertical bars 8-2 and the guard horizontal bars 8-3 are arranged in a cross manner, providing support and protection for the crawling personnel and increasing the safety during the crawling process; a plurality of guard horizontal bars 8-3 can also be arranged at the top of the first support platform 1 or the top of the third support platform 3 to provide support for the bottom plate 8-1 at this place and increase the strength of the overall structure of the bottom plate 8-1.
[0031] As an option in the embodiment of the present application, the cantilever support frame 4 includes two support members 4-1 arranged in parallel; the support member 4-1 includes a cantilever main beam 4-11 and a diagonal brace beam 4-12. The diagonal brace beam 4-12 is fixedly arranged on the cantilever main beam 4-11 in an inclined manner.
[0032] Reference can be made here Figure 2 . As Figure 2 shown, specifically, one end of the cantilever main beam 4-11 is fixedly arranged on the support beam a, and above the other end, there is the first support platform 1 or the second support platform 2 or the third support platform 3. A diagonal brace beam 4-12 is fixedly arranged below the other end. One end of the diagonal brace beam 4-12 close to the support beam a is either abutted or fixed to the support beam a, and the other end of the diagonal brace beam 4-12 far from the support beam a is fixedly connected to the cantilever main beam 4-11, transmitting the force acting on the cantilever main beam 4-11 to the support beam a and increasing the anti-overturning ability of the overall cantilever safety climbing ladder.
[0033] As an option in the embodiment of the present application, a cantilever transverse fixing member 4-2 is also arranged between the cantilever support frames 4. The cantilever transverse fixing member 4-2 is perpendicularly connected to the adjacent cantilever support frame 4.
[0034] Reference can be made here Figure 1 As shown Figure 1 Specifically, the cantilever lateral fixing member 4-2 connects adjacent cantilever support frames 4 into a whole, improving the structural stability between adjacent cantilever support frames 4 and at the same time increasing the torsional strength of the cantilever support frame 4 in the lateral direction.
[0035] As an option of the embodiment of the present application, first ladder support rods 5-1 are fixedly provided on both sides of the first ladder 5, and one end of the first ladder support rod 5-1 away from the first ladder 5 is fixedly provided on the cantilever support frame 4 below the first support platform 1; second ladder support rods 6-1 are fixedly provided on both sides of the second ladder 6, and one end of the second ladder support rod 6-1 away from the second ladder 6 is fixedly provided on the cantilever support frame 4 below the third support platform 3.
[0036] Reference can be made here Figure 1 As shown Figure 1 Specifically, the first ladder support rod 5-1 cooperates with the first support platform 1 and the third support platform 3 on both sides of the first ladder 5 to provide support for the first ladder 5 and increase the load-bearing capacity of the first ladder 5;
[0037] The second ladder support rod 6-1 cooperates with the second support platform 2 and the third support platform 3 on both sides of the second ladder 6 to provide support for the second ladder 6 and increase the load-bearing capacity of the second ladder 6.
[0038] As an option of the embodiment of the present application, safety nets are hung on both sides of the first ladder 5 and the second ladder 6.
[0039] Specifically, the safety net provides protection for the climbing personnel to prevent the climbing personnel from falling from the gaps on both sides of the first ladder 5 or the second ladder 6 due to slipping; the mesh density of the safety net is ≥ 2600 meshes / 100 square centimeters, and it is fully hung on both sides of the first ladder 5, the second ladder 6 and the standing platform 8 with binding wires.
[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.
[0041] Although the following terms are used more frequently in this text: the first support platform 1, the first support frame 1-1, the second support platform 2, the third support platform 3, the second support frame 3-1, the cantilever support frame 4, the support member 4-1, the cantilever main beam 4-11, the diagonal bracing beam 4-12, the cantilever transverse fixing member 4-2, the first ladder 5, the first ladder support rod 5-1, the second ladder 6, the second ladder support rod 6-1, the transverse strengthening connecting rod 7, the standing platform 8, the bottom plate 8-1, the guard vertical rod 8-2, the guard horizontal rod 8-3, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any kind of additional limitation is contrary to the spirit of the present utility model.
Claims
1. A cantilever safety ladder for building deep foundation pits, characterized in that: The invention comprises a first supporting platform (1), a second supporting platform (2) and a third supporting platform (3) located between the first supporting platform (1) and the second supporting platform (2); a cantilever supporting frame (4) is fixedly provided at the bottom of the first supporting platform (1), the second supporting platform (2) and the third supporting platform (3); a first ladder (5) is connected between the top of the first supporting platform (1) and the top of the third supporting platform (3), and a second ladder (6) is connected between the top of the second supporting platform (2) and the top of the third supporting platform (3).
2. A cantilever safety ladder for a deep foundation pit of a building according to claim 1, characterized in that: At least two transverse reinforcing connecting rods (7) are arranged between the first supporting platform (1) and the third supporting platform (3), and the transverse reinforcing connecting rods (7) are vertically connected to the first supporting platform (1) and the third supporting platform (3) located at both ends thereof.
3. A cantilever safety ladder for a deep foundation pit of a building according to claim 1, characterized in that: The first supporting platform (1) is higher than the third supporting platform (3), and the third supporting platform (3) is higher than the second supporting platform (2).
4. A cantilever safety ladder for a deep foundation pit of a building according to claim 1, characterized in that: The first support platform (1), the second support platform (2) and the third support platform (3) all comprise a standing platform (8); The first supporting platform (1) further comprises a first supporting frame (1-1), and the third supporting platform (3) further comprises a second supporting frame (3-1), and the first supporting frame (1-1) is higher than the second supporting frame (3-1).
5. A cantilever safety ladder for building deep foundation pits according to claim 4, characterized in that: The standing platform (8) comprises a bottom plate (8-1) and four vertical guard bars (8-2), wherein the four vertical guard bars (8-2) are respectively located at four top corners of the bottom plate (8-1) and are arranged perpendicular to the bottom plate (8-1).
6. A cantilever safety ladder for a deep foundation pit of a building according to claim 5, characterized in that: A plurality of guarding cross bars (8-3) are arranged around the standing platform (8), and the guarding cross bars (8-3) are perpendicular to the guarding vertical bars (8-2) and fixedly connected to the guarding vertical bars (8-2).
7. The cantilever safety ladder for deep foundation pits of buildings according to claim 1, characterized in that: The cantilever support frame (4) comprises two support members (4-1) arranged in parallel; the support member (4-1) comprises a cantilever main beam (4-11) and an oblique support beam (4-12); the oblique support beam (4-12) is obliquely fixed on the cantilever main beam (4-11).
8. The cantilever safety ladder for deep foundation pits of buildings according to claim 1, characterized in that: A cantilevered transverse fixing member (4-2) is also provided between the cantilevered support frames (4) and the cantilevered transverse fixing member (4-2) is vertically connected to an adjacent cantilevered support frame (4).
9. The cantilever safety ladder for deep foundation pits of buildings according to claim 1, characterized in that: First ladder support rods (5-1) are fixedly provided on both sides of the first ladder (5); one end of the first ladder support rod (5-1) away from the first ladder (5) is fixedly provided on a cantilever support frame (4) below the first support platform (1); Second ladder support rods (6-1) are fixedly provided on both sides of the second ladder (6); one end of the second ladder support rod (6-1) away from the second ladder (6) is fixedly provided on a cantilever support frame (4) below the third support platform (3).
10. The cantilever safety ladder for deep foundation pit of a building according to claim 1, characterized in that: Safety nets are hung on both sides of the first ladder (5) and the second ladder (6).