Mining combined type adjustable ladder

Abstract

The utility model discloses a mining combined type adjustable ladder, which relates to the technical field of mining equipment and comprises a support base and a plurality of step components rotatably mounted on the support base. Anchor holes are formed in the bottom of the supporting base and used for fixing the supporting base to a slope. The step assembly comprises a pedal and supporting legs. The supporting legs are vertically arranged at the rear end of the pedal and are adjustable in length; the front end of the pedal is rotationally mounted on the supporting base; during working, the pedal is kept horizontal all the time, and the bottoms of the supporting legs abut against the supporting base. After the structure is adopted, the pedal is rotationally mounted on the supporting base, so that the mounting and dismounting efficiency is improved, and the labor intensity is reduced. And meanwhile, the pedal is always kept horizontal, so that the safety and comfort of the operating personnel during walking are ensured. In addition, the height of the supporting legs is adjusted according to the angle of the slope, the flexibility is high, and rapid adjustment or disassembly can be conducted according to changes of site conditions.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a mining combined adjustable ladder. Background Technology

[0002] Ensuring the safety of underground workers is of paramount importance in coal mining operations. Especially in inclined roadways, due to the unique terrain, workers face serious safety risks such as slipping and rolling while walking. To effectively address this issue, for inclined roadways with a slope of 10° or more in coal mines, steps are typically laid to provide underground workers with a relatively safe and stable passageway.

[0003] Traditional methods for constructing ramps in coal mines primarily utilize precast ramp slabs. These slabs require cement, sand, and other auxiliary materials for fixing and grouting during installation. However, this method has significant drawbacks: the construction process is cumbersome and complex, consuming considerable time and manpower, leading to a substantial increase in the labor intensity of workers; furthermore, due to limitations in material usage and fixing methods, the adjustability and reusability of the ramps are poor. Once laid, it is difficult to quickly adjust or disassemble them according to changes in site conditions, which to some extent limits their flexible application across different levels and mining areas. Utility Model Content

[0004] The purpose of this invention is to provide a modular adjustable ladder for mining, which is quick to install and disassemble, and its angle can be adjusted according to the slope of the roadway to ensure the safety and comfort of workers when walking.

[0005] To achieve the above objectives, this utility model provides a mine-use modular adjustable step, including a support base and multiple step assemblies rotatably mounted on the support base; the bottom of the support base is provided with anchor holes for fixing the support base to the slope; the step assembly includes a pedal and a support leg; the support leg is vertically arranged at the rear end of the pedal and its length is adjustable; the front end of the pedal is rotatably mounted on the support base; during operation, the pedal always remains horizontal and the bottom of the support leg rests against the support base.

[0006] With the above structure, the pedal is first rotated and installed on the support base, improving the efficiency of installation and disassembly and reducing labor intensity. At the same time, the pedal remains level, ensuring the safety and comfort of workers when walking. Furthermore, the height of the support legs can be adjusted according to the slope angle, offering high flexibility and allowing for quick adjustment or disassembly based on changes in site conditions.

[0007] Preferably, each pedal is equipped with two support legs, located on either side of the rear end of the pedal. This design ensures balanced force distribution on the pedal, guaranteeing the safety of workers when walking on it.

[0008] Preferably, the support base includes a left bracket and a right bracket arranged opposite each other, and a connecting base plate that fixes the left and right brackets into a whole; the left and right brackets are provided with shaft holes opposite each other, and the pedal is rotatably mounted between the left and right brackets; a pedal shaft is rotatably mounted at the front end of the pedal, and a locking cotter pin is installed at one end of the pedal shaft that protrudes from the shaft hole. This structural design achieves lightweight design while preventing the pedal shaft from detaching and causing a safety accident.

[0009] Preferably, a positioning support plate is fixed on the support base, and the bottom of the support leg abuts against the positioning support plate. The width of the positioning support plate is greater than the range of motion of the support leg. This structural design ensures the stability of the support leg.

[0010] Preferably, the bottom of the support leg is provided with an external thread, and a support nut is screwed onto the external thread; a slotted hole is opened on the positioning support plate, through which the support leg passes; the support nut abuts against the top of the slotted hole. This structure provides limiting support for the support leg, and the height of the support leg can be adjusted by rotating the support nut, making it convenient and quick.

[0011] Preferably, the pedal is made of threaded steel welded at intervals. This structure ensures sufficient friction.

[0012] Preferably, one end of the support base is fixed with a U-shaped insert post, and the other end is fixed with a sleeve for inserting the U-shaped insert post. This structure allows for easy connection of multiple adjustable steps, thus accommodating ramps of different lengths.

[0013] Preferably, the support leg is rotatably mounted at one end of the bottom of the pedal; a limiting device is provided between the pedal and the support leg, which restricts the support leg from being parallel to or perpendicular to the pedal. This structure facilitates storage and transportation.

[0014] Preferably, the pedal has rotating holes on both sides, and a rotating shaft is fixed on the support leg, with the rotating shaft rotatably installed in the rotating holes. The limiting device includes a polygonal groove in the center of the rotating shaft, and a polygonal hole communicating with the polygonal groove at the bottom of the rotating hole. A polygonal post is provided in the polygonal hole, which can be inserted into the polygonal groove. When the inner end of the polygonal post is inserted into the polygonal groove, the rotating shaft cannot rotate. This structure prevents the pedal and support leg from rotating.

[0015] Preferably, a pull ring is provided at one end of the polygonal column located outside the polygonal hole, and a protective cover is detachably installed on the outside of the polygonal hole, covering the pull ring. This structure prevents the pedal and support leg from failing due to vibration or misoperation, thus avoiding safety accidents.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are:

[0017] This utility model, a modular adjustable step for mining applications, solves the technical problem of low construction efficiency in existing mining ramp steps. The new design first rotates the footboards onto the support base, improving installation and disassembly efficiency and reducing labor intensity. Simultaneously, the footboards remain horizontal, ensuring the safety and comfort of workers. Furthermore, the height of the support legs can be adjusted according to the slope angle, offering high flexibility and allowing for quick adjustment or disassembly based on changes in site conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a combined adjustable ladder for mining applications according to this utility model;

[0019] Figure 2 This is a schematic diagram of the installation position of this utility model on a slope.

[0020] Figure 3 This is a top view of the supporting base;

[0021] Figure 4 This is a schematic diagram of the combined installation structure of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the working state of the step assembly in Embodiment 2;

[0023] Figure 6 This is a schematic diagram of the folded state of the step assembly in Embodiment 2;

[0024] Figure 7 This is a schematic diagram of the limiting device.

[0025] In the figure, 1. Support base, 11. Left bracket, 12. Right bracket, 13. Connecting base plate, 131. Anchor hole, 14. Fixed bushing, 15. Positioning support plate, 16. U-shaped insert, 17. Sleeve, 2. Step assembly, 21. Pedal, 211. Rotary hole, 22. Support leg, 221. Support nut, 222. Polygonal groove, 223. Rotating shaft, 23. Polygonal column. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] The orientations mentioned in this specification are based on the orientation of the adjustable mining ladder of this utility model when it is working normally. They do not limit the orientation during storage and transportation, and only represent relative positional relationships, not absolute positional relationships.

[0028] Example 1:

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a mine-use modular adjustable ladder includes a support base 1 and multiple step assemblies 2 rotatably mounted on the support base 1. In this embodiment, considering the convenience of transportation and installation during construction, the support base 1 is designed to be 1.5 meters long, and three sets of step assemblies 2 are installed on each section of the support base 1. The ladder is lightweight and easy to install.

[0030] The support base 1, serving as the foundation of the entire staircase, is made of high-strength steel. It includes a left support 11 and a right support 12 arranged opposite each other, and a connecting base plate 13 that secures the left and right supports 11 and 12 as a single unit. Anchor holes 131 are provided at the bottom of the connecting base plate 13 for firmly fixing the support base 1 to the slope. Axle holes are provided opposite each other on the left and right supports 11 and 12 for installing the step assembly 2.

[0031] To achieve a lightweight design, the left support 11 and right support 12 each include two upper and lower supports that are fixed relative to each other. A fixing sleeve 14 is fixed between the upper and lower supports, and the fixing sleeve 14 has a shaft hole. In this embodiment, the upper and lower supports are made of Φ22 steel bars, which are welded to the fixing sleeve 14 to form a single unit. The number of fixing sleeves 14 is determined by the number of step components 2. Since three sets of step components 2 are installed on each section of the support base 1 in this embodiment, three fixing sleeves 14 are also provided. The fixing sleeves 14 not only facilitate the installation of the step components 2 but also ensure the overall support strength of the left support 11 and right support 12.

[0032] The step assembly 2 includes a tread 21 and a support leg 22. The tread 21 is made of a non-slip and wear-resistant material, and its surface is provided with anti-slip textures to increase friction when walking. In this embodiment, the tread 21 is made of threaded steel welded at intervals to increase anti-slip performance. The support leg 22 is vertically arranged at the rear end of the tread 21, and its length is adjustable to adapt to tunnels with different slopes. The bottom of the support leg 22 is provided with an anti-slip pad or anti-slip teeth to ensure the stability of the steps during use.

[0033] To ensure balanced force distribution, each pedal 21 is equipped with two support legs 22, which are located on both sides of the rear end of the pedal 21.

[0034] During operation, the pedal 21 remains horizontal, and the bottom of the support leg 22 always rests against the support base 1. In this embodiment, a positioning support plate 15 is welded to the inner side of the left bracket 11 and the right bracket 12 to position and support the support leg 22 of the upper step assembly 2. The length of the support leg 22 is adjustable to adjust the height of the pedal 21 according to the slope of the roadway, ensuring that the pedal 21 always remains horizontal. Due to different tilt angles of the support base 1, the position of the positioning support point of the support leg 22 will change when adjusting the height of the support leg 22. Therefore, it is necessary to reserve adjustment space for the support leg 22 on the positioning support plate 15, that is, the width of the positioning support plate 15 is greater than the range of motion of the support leg 22.

[0035] In this embodiment, the length of the support leg 22 is adjustable as follows: an external thread is provided at the bottom of the support leg 22, and a support nut 221 is installed on the external thread. A slotted hole is provided on the positioning support plate 15, through which the support leg 22 passes; the support nut 221 abuts against the top of the slotted hole. The length of the support leg 22 can be precisely adjusted by adjusting the position of the support nut 221.

[0036] like Figure 4 As shown, to enhance the flexibility and reusability of the steps, in this embodiment, a U-shaped insert 16 is fixed at one end of the upper and lower ends of the support base 1, and a sleeve 17 for inserting the U-shaped insert 16 is fixed at the other end. Through the cooperation of the U-shaped insert 16 and the sleeve 17, multiple support bases 1 can be quickly connected and disassembled, thereby flexibly combining and disassembling the steps according to the length of the tunnel.

[0037] Example 2:

[0038] To facilitate transfer and handling, this embodiment is a further improvement on embodiment one.

[0039] like Figure 5 , Figure 6 and Figure 7 As shown, the support leg 22 is rotatably mounted on one end of the bottom of the pedal 21; a limiting device is provided between the pedal 21 and the support leg 22, which limits the support leg 22 from being parallel to or perpendicular to the pedal 21. When in operation, the support leg 22 is perpendicular to the pedal 21, thereby providing support; when not in operation, the support leg 22 is parallel to the pedal 21, thereby allowing for storage.

[0040] Rotating holes 211 are provided on both sides of the pedal 21, and a rotating shaft 223 is fixed on the support leg 22. The rotating shaft 223 is rotatably installed in the rotating hole 211.

[0041] One embodiment of the limiting device is as follows: the limiting device includes a polygonal groove 222 opened in the center of the rotating shaft 223, and a polygonal hole communicating with the polygonal groove 222 is provided at the bottom of the rotating hole 211; a polygonal post 23 that can be inserted into the polygonal groove 222 is provided in the polygonal hole, and the rotating shaft 223 cannot rotate when the inner end of the polygonal post 23 is inserted into the polygonal groove 222.

[0042] To facilitate the removal of the polygonal post 23, a pull ring is provided at the outer end of the polygonal post 23 located in the polygonal hole. The pull ring can be folded downwards. Of course, to prevent accidental operation or vibration causing the polygonal post 23 to dislodge from the polygonal slot 222 and cause an accident, a protective cover (not shown in the figure) can be screwed onto the outside of the polygonal hole. The protective cover covers the outside of the polygonal post 23 to prevent accidental operation.

[0043] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A modular adjustable stairway for mining, characterized by: The support base is provided with anchor holes for fixing the support base to a slope surface. The support base is provided with anchor holes for fixing the support base to a slope surface. The step assembly comprises a tread plate and a support leg, and the support leg is vertically arranged at the rear end of the tread plate and has an adjustable length. The front end of the tread plate is rotatably arranged on the support base, and the tread plate is always kept horizontal during operation, and the bottom of the support leg is abutted against the support base.

2. A modular adjustable stairway for mining as claimed in claim 1 wherein: Two support legs are arranged on each tread plate and located at the two sides of the rear end of the tread plate.

3. A modular adjustable stairway for mining as claimed in claim 1 wherein: The support base comprises left and right supports and a connecting bottom plate for fixing the left and right supports as a whole, and the left and right supports are provided with shaft holes. The front end of the tread plate is rotatably arranged on the support base, and the tread plate is always kept horizontal during operation, and the bottom of the support leg is abutted against the support base.

4. A modular adjustable stairway for mining as claimed in claim 1 wherein: The support base is provided with a positioning support plate, and the bottom of the support leg is abutted against the positioning support plate.

5. A modular adjustable stairway for mining as claimed in claim 4 wherein: The support leg is provided with external threads, and a support nut is screwed on the external threads. The positioning support plate is provided with a waist-shaped hole, and the support leg passes through the waist-shaped hole.

6. A modular adjustable stairway for mining as claimed in claim 1 wherein: The tread plate is made of spaced-welded threaded steel.

7. A modular adjustable stairway for mining as claimed in claim 1 wherein: The support base is provided with a U-shaped insertion column at one end and a sleeve for inserting the U-shaped insertion column at the other end.

8. A modular adjustable stairway for mining as claimed in claim 1 wherein: The support leg is rotatably arranged at one end of the bottom of the tread plate. A limiting device is arranged between the tread plate and the support leg, and the limiting device limits the support leg to be parallel or vertical to the tread plate.

9. A modular adjustable stairway for mining as claimed in claim 8 wherein: The tread plate is provided with screw holes at the two sides, and the support leg is provided with a rotating shaft rotatably arranged in the screw holes. The limiting device comprises a polygonal slot arranged at the center of the rotating shaft, and the bottom of the screw hole is provided with a polygonal hole in communication with the polygonal slot.

10. A modular adjustable stairway for mining as claimed in claim 9 wherein: The polygonal column is provided with a pull ring at one end outside the polygonal hole, and a protective cover is detachably arranged outside the polygonal hole.

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