Safety step ladder for tunnel shaft

Abstract

The utility model relates to the technical field of tunnel shafts, and discloses a safety step ladder for a tunnel shaft, which comprises a transverse step ladder assembly, a longitudinal step ladder assembly is arranged on the outer wall of the transverse step ladder assembly, a sliding block is fixedly connected to the outer wall of the longitudinal step ladder assembly, the outer wall of the sliding block is connected in the transverse step ladder assembly in a sliding mode, a clamping shell is connected in the transverse step ladder assembly in a sliding mode, and the clamping shell is fixedly connected to the transverse step ladder assembly. A fixing plate is fixedly connected to the interior of the clamping shell, a shifting block is slidably connected to the outer wall of the fixing plate, a limiting block is fixedly connected to the lower bottom of the shifting block, the outer wall of the limiting block is slidably connected to the interior of the transverse step ladder frame, a limiting groove is formed in the limiting block, and a sliding column is fixedly connected to the interior of the clamping shell. According to the transverse and longitudinal step ladder assembly splicing device, linkage is achieved through the limiting structure, the sliding columns, the springs, the limiting grooves and other structures, the transverse and longitudinal step ladder assembly sheets can be spliced, the problem that disassembly and splicing cannot be conveniently and rapidly conducted during moving transportation is solved, and work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel shafts, in particular to a safety ladder for tunnel shafts. Background Art

[0002] A tunnel shaft is a vertical passageway, usually used to connect a tunnel and the ground. Its main functions are to provide ventilation, drainage, access channels for personnel and equipment, etc. The design and construction of tunnel shafts need to consider many factors, such as geological conditions, tunnel length, ventilation requirements, drainage requirements, etc. During the design and construction process, relevant specifications and standards need to be followed to ensure the safety and reliability of the tunnel shaft. In order to ensure that personnel can enter and exit safely and conveniently under various circumstances, ladders are usually installed in the tunnel shaft.

[0003] Existing ladders for tunnel shafts are usually made of sturdy materials, such as steel or aluminum alloy, to ensure that they can bear the weight of personnel and possible impact forces. The size and spacing of the ladder steps should conform to ergonomic principles to provide a comfortable and safe climbing experience. The ladder should also be equipped with handrails and railings to provide additional support and protection. The height and spacing of the handrails and railings should conform to relevant standards to ensure that personnel can hold firmly when climbing. It is also necessary to regularly maintain and inspect the ladder to ensure its good working condition.

[0004] However, for existing ladders for tunnel shafts, they usually need to be transported as a whole during handling and cannot be flexibly disassembled and assembled. This will greatly increase the difficulty and cost of handling. Since they cannot be disassembled, the transport vehicle may require a larger loading space, thus increasing the transportation cost. Moreover, during the handling process, due to the large volume of the ladder, it may be restricted by factors such as road width limit and height limit, affecting the transportation efficiency. Therefore, a safety ladder for tunnel shafts is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a safety ladder for tunnel shafts, aiming to improve the problem that it cannot be disassembled and assembled in the prior art, resulting in inconvenient transportation and installation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] Safety ladder for tunnel shaft, including a horizontal ladder frame, on the outer wall of the horizontal ladder frame is provided a vertical ladder frame, on the outer wall of the vertical ladder frame is fixedly connected with a slider, the outer wall of the slider is slidably connected inside the horizontal ladder frame, inside the horizontal ladder frame is slidably connected with a clamping outer shell, inside the clamping outer shell is fixedly connected with a fixing plate, on the outer wall of the fixing plate is slidably connected with a shifting block, at the lower bottom of the shifting block is fixedly connected with a limiting block, the outer wall of the limiting block is slidably connected inside the horizontal ladder frame, inside the limiting block is provided a limiting groove, inside the clamping outer shell is fixedly connected with a sliding column, on the outer wall of the sliding column is sleeved with a first spring, one end of the first spring is fixedly connected inside the clamping outer shell, the other end of the first spring is fixedly connected to the outer wall of the limiting block, the outer wall of the sliding column is slidably connected inside the limiting groove, the horizontal ladder frame is provided with a placing component, and the placing component is used for placing device objects;

[0008] As a further description of the above technical solution:

[0009] The connecting component includes a connecting plate, and the outer wall of the connecting plate is fixedly connected to the outer wall of the vertical ladder frame;

[0010] As a further description of the above technical solution:

[0011] At the top of the vertical ladder frame is provided a platform, and a staircase is rotatably connected to the outer wall of the platform;

[0012] As a further description of the above technical solution:

[0013] Inside the horizontal ladder frame is slidably connected with a grille, and a fixing block is fixedly connected to the outer wall of the grille;

[0014] As a further description of the above technical solution:

[0015] Inside the fixing block is slidably connected with a connecting outer shell, a handle is fixedly connected to the outer wall of the connecting outer shell, and a fixing column is fixedly connected inside the connecting outer shell;

[0016] As a further description of the above technical solution:

[0017] Inside the fixing column is slidably connected with a clamping block, inside the fixing column is slidably connected with a lifting column, a chute is provided inside the lifting column, and the outer wall of the clamping block is slidably connected inside the chute;

[0018] As a further description of the above technical solution:

[0019] A second spring is sleeved on the outer wall of the lifting column, the upper top of the second spring is fixedly connected with a connecting block, and the lower bottom of the second spring is fixedly connected to the top of the fixing column;

[0020] As a further description of the above technical solution:

[0021] The outer wall of the connection block is slidably connected to the inside of the connection shell, and a button is fixedly connected to the top of the connection block.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the limiting block realizes its moving function by pressing the dial block. When the dial block is pressed, structures such as the slide column, the spring and the limiting groove will be linked accordingly to limit the slider, and the horizontal and vertical step ladder frames can be conveniently spliced, so as to facilitate their movement, which solves the problem that they cannot be conveniently disassembled and spliced ​​during mobile transportation, and improves work efficiency.

[0024] 2. In the utility model, the slide groove realizes its lifting function by pressing a button. When the button is pressed, the connecting block, spring, lifting column and other structures will be linked to push and fix the card block, so that the grille net can be replaced and maintained conveniently, which solves the problem that the grille net cannot be conveniently replaced or disassembled for maintenance when it is broken, and improves the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of a safety step ladder for a tunnel shaft proposed by the utility model;

[0026] Figure 2 It is a schematic diagram of the structure inside the horizontal step ladder frame of the safety step ladder for the tunnel shaft proposed by the utility model;

[0027] Figure 3 This is a schematic diagram of the structure inside the tooth housing of the safety step ladder for the tunnel shaft proposed by the utility model;

[0028] Figure 4 The utility model is a schematic diagram of the structure of the interior of the connecting shell of the safety step ladder for the tunnel shaft proposed by the utility model.

[0029] Legend:

[0030] 1. Horizontal step ladder; 2. Clamp housing; 3. Platform; 4. Stairs; 5. Vertical step ladder; 6. Grille; 7. Dial block; 8. Limit block; 9. Slider; 10. Limit groove; 11. Sliding column; 12. Spring 1; 13. Fixed column; 14. Lifting column; 15. Fixed block; 16. Connecting block; 17. Button; 18. Connecting housing; 19. Handle; 20. Spring 2; 21. Sliding groove; 22. Clamp block; 23. Fixed plate; 24. Connecting plate. DETAILED DESCRIPTION

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Referring to Figures 1 - 3 , an embodiment provided by the present invention: a safety step ladder for a tunnel shaft, including a horizontal step ladder frame 1. A vertical step ladder frame 5 is arranged on the outer wall of the horizontal step ladder frame 1. A slider 9 is fixedly connected to the outer wall of the vertical step ladder frame 5. The outer wall of the slider 9 is slidably connected inside the horizontal step ladder frame 1. A clamping outer shell 2 is slidably connected inside the horizontal step ladder frame 1. A fixing plate 23 is fixedly connected inside the clamping outer shell 2. A dial block 7 is slidably connected to the outer wall of the fixing plate 23. A limiting block 8 is fixedly connected to the lower bottom of the dial block 7. The outer wall of the limiting block 8 is slidably connected inside the horizontal step ladder frame 1. A limiting groove 10 is opened inside the limiting block 8. A sliding column 11 is fixedly connected inside the clamping outer shell 2. A first spring 12 is sleeved on the outer wall of the sliding column 11. One end of the first spring 12 is fixedly connected inside the clamping outer shell 2, and the other end of the first spring 12 is fixedly connected to the outer wall of the limiting block 8. The outer wall of the sliding column 11 is slidably connected inside the limiting groove 10. The horizontal step ladder frame is provided with a placing component, and the placing component is used for placing device objects.

[0033] Specifically, the vertical step ladder frame 5 drives the slider 9 to slide into the horizontal step ladder frame 1. Then, the dial block 7 is pressed, and the limiting block 8 is driven to move by the dial block 7. Then, the first spring 12 is compressed by the limiting block 8. Then, the clamping outer shell 2 is placed inside the horizontal step ladder frame 1. The dial block 7 is released, and the limiting block 8 rebounds to its original position by the rebound of the first spring 12. Then, because the limiting block 8 is convex, half of the limiting block 8 is inside the clamping outer shell 2 and the other half is inside the horizontal step ladder frame 1, so as to uniformly limit the slider 9, which can make the handling more flexible, reduce the difficulties and inconveniences in the handling process, and when not in use, the step ladder can be disassembled into small pieces for storage, saving storage space. When the step ladder is needed, it can be quickly spliced and installed to improve work efficiency.

[0034] Referring to Figure 1 , the connecting component includes a connecting plate 24, and the outer wall of the connecting plate 24 is fixedly connected to the outer wall of the vertical step ladder frame 5.

[0035] Specifically, items can be conveniently placed on the top of the two vertical step ladder frames 5 through the symmetrically arranged connecting plates 24 connected to the outer walls, making full use of the top space of the vertical step ladder frames 5 and making the functions of the whole device more diverse.

[0036] Referring to Figure 1 and Figure 3, a platform 3 is provided at the top of the longitudinal step frame 5. A staircase 4 is rotatably connected to the outer wall of the platform 3. A grille 6 is slidably connected inside the transverse step frame 1. A fixed block 15 is fixedly connected to the outer wall of the grille 6. A connection housing 18 is slidably connected inside the fixed block 15. A handle 19 is fixedly connected to the outer wall of the connection housing 18. A fixed column 13 is fixedly connected inside the connection housing 18. A clamping block 22 is slidably connected inside the fixed column 13. A lifting column 14 is slidably connected inside the fixed column 13. A chute 21 is formed inside the lifting column 14. The outer wall of the clamping block 22 is slidably connected inside the chute 21. A second spring 20 is sleeved on the outer wall of the lifting column 14. The upper top of the second spring 20 is fixedly connected to a connection block 16. The lower bottom of the second spring 20 is fixedly connected to the top of the fixed column 13. The outer wall of the connection block 16 is slidably connected inside the connection housing 18. A button 17 is fixedly connected to the top of the connection block 16.

[0037] Specifically, press the button 17. The connection block 16 is driven to lift by the button 17. Then the lifting column 14 is driven to move by the connection block 16, and at the same time, the second spring 20 is compressed. Then the chute 21 is driven to lift by the lifting column 14, so that the clamping block 22 moves. Thus, the connection housing 18 is lifted by the handle 19. Then release the button 17. The second spring 20 rebounds to drive the chute 21 to descend and push out the clamping block 22. Thus, the grille 6 can be conveniently placed inside the transverse step frame 1 and the longitudinal step frame 5. Placing the grille 6 on the step can prevent people or objects from slipping off the step, increasing the safety of use, preventing sundries, tools, etc. from falling off the step, protecting the people and environment below, and at the same time playing a certain supporting and strengthening role for the step, improving the stability of the structure. It will not affect air circulation and natural lighting, maintaining a good environment in the step area. At the same time, the grille 6 can be easily removed for cleaning, maintenance or replacement, keeping the step in good condition. And regular inspection and maintenance of the grille 6 can ensure its firmness and reliability, reducing potential safety hazards.

[0038] Working principle: Place the grille 6 inside the horizontal step ladder frame 1 and the vertical step ladder frame 5. Then press the button 17, which drives more connecting blocks 16 at the bottom to move up and down. Then, through the connecting blocks 16, the bottom lifting column 14 is pushed to move up and down inside the fixed column 13. Then, the lifting column 14 drives the internally opened chute 21 to move, causing the clamping block 22 to slide. At the same time, the connecting block 16 compresses the second spring 20 connected to the bottom. Then, the handle 19 drives the connecting housing 18 to slide inside the fixed block 15 into the horizontal step ladder frame 1 or the vertical step ladder frame 5. Then release the button 17, and the second spring 20 rebounds to drive the lifting column 14 to rise, driving the chute 21 to rise, thereby pushing the clamping block 22 to move outwards and fixing it inside the horizontal step ladder frame 1 or the vertical step ladder frame 5. Then, the vertical step ladder frame 5 drives the externally fixed slider 9 to slide into the horizontal step ladder frame 1. Then press the dial block 7, which drives the bottom-fixed limiting block 8 to move, causing the sliding column 11 to slide inside and compressing the first spring 12 at the same time. Then place the clamping housing 2 inside the horizontal step ladder frame 1, on top of the slider 9. Then release the dial block 7, and the first spring 12 rebounds to drive the limiting block 8 to move and limit the slider 9. Then place the platform 3 on top of the connecting plate 24, thus splicing the step ladder.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A safety step ladder for a tunnel shaft, comprising a horizontal step ladder frame (1) and a connecting assembly, characterized in that: The outer wall of the horizontal step ladder frame (1) is provided with a vertical step ladder frame (5), the outer wall of the vertical step ladder frame (5) is fixedly connected with a slider (9), the outer wall of the slider (9) is slidably connected to the inside of the horizontal step ladder frame (1), the inside of the horizontal step ladder frame (1) is slidably connected with a clamping shell (2), the inside of the clamping shell (2) is fixedly connected with a fixing plate (23), the outer wall of the fixing plate (23) is slidably connected with a shifting block (7), the lower bottom of the shifting block (7) is fixedly connected with a limiting block (8), and the outer wall of the limiting block (8) is slidably connected to the horizontal step ladder frame (1). Inside, a limiting groove (10) is provided inside the limiting block (8), a sliding column (11) is fixedly connected inside the clamping shell (2), a spring (12) is sleeved on the outer wall of the sliding column (11), one end of the spring (12) is fixedly connected inside the clamping shell (2), and the other end of the spring (12) is fixedly connected to the outer wall of the limiting block (8), the outer wall of the sliding column (11) is slidably connected inside the limiting groove (10), and the horizontal step ladder (1) is provided with a placement component, which is used to place the device object.

2. The safety step ladder for tunnel shaft according to claim 1, characterized in that: The connection assembly comprises a connection plate (24), the outer wall of the connection plate (24) being fixedly connected to the outer wall of the longitudinal step ladder frame (5).

3. The safety step ladder for tunnel shaft according to claim 1, characterized in that: A platform (3) is arranged on the top of the vertical step ladder frame (5), and a staircase (4) is rotatably connected to the outer wall of the platform (3).

4. The safety step ladder for tunnel shaft according to claim 3, characterized in that: The horizontal step ladder frame (1) is slidably connected to a grille net (6) inside, and a fixing block (15) is fixedly connected to the outer wall of the grille net (6).

5. The safety step ladder for tunnel shaft according to claim 4, characterized in that: The fixing block (15) is slidably connected to a connecting shell (18) inside, the outer wall of the connecting shell (18) is fixedly connected to a handle (19), and the inside of the connecting shell (18) is fixedly connected to a fixing column (13).

6. The safety step ladder for a tunnel shaft according to claim 5, characterized in that: A clamping block (22) is slidably connected inside the fixed column (13), a lifting column (14) is slidably connected inside the fixed column (13), a sliding groove (21) is provided inside the lifting column (14), and an outer wall of the clamping block (22) is slidably connected inside the sliding groove (21).

7. The safety step ladder for a tunnel shaft according to claim 6, characterized in that: The outer wall of the lifting column (14) is sleeved with a second spring (20), the top of the second spring (20) is fixedly connected to a connecting block (16), and the bottom of the second spring (20) is fixedly connected to the top of the fixing column (13).

8. The safety step ladder for a tunnel shaft according to claim 7, characterized in that: The outer wall of the connection block (16) is slidably connected to the interior of the connection housing (18), and a button (17) is fixedly connected to the top of the connection block (16).

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