Quickly dismountable stairway with minimum number of parts for mine slopes

Abstract

The present application relates to the technical field of mine operation, and more particularly to a quick dismountable stair with minimum part types suitable for mine slope, comprising two parts: a ladder piece and a fixing pin. The ladder piece is provided with at least one pair of tenon and groove capable of mortise and tenon interlocking clamping. The ladder piece is provided with at least one pair of connecting block and slot capable of fitting connection. The bottom surface of the ladder piece is a slope placed on the mine slope. The transverse expansion of the step is realized by the mortise and tenon interlocking clamping of the tenon and groove. The longitudinal expansion of the step is realized by the up and down fitting splicing, and the fixed pin is screwed through the tread surface and the connecting block from top to bottom. Therefore, the present application can be simply and flexibly dismounted in a narrow mine, meet long distance laying, shorten the dismounting period, and solve the problems of too many types of dismountable stair parts, complicated operation steps, time-consuming, and low dismounting efficiency.

Description

Technical Field

[0001] This invention relates to mine operation stairs in the field of mine operation technology, and in particular to a quick-assembly and disassembly stairs with a minimum number of parts suitable for use on mine slopes. Background Technology

[0002] The internal environment of mines is typically characterized by high humidity, high dust levels, low visibility, and irregular spatial structures. Especially at the entrances to underground working faces in coal mines, there are usually long (50-200 meters) steep slopes (inclination angles typically between 15° and 30°). These slopes are constantly covered by groundwater seepage and mud from machinery operations, and the dim lighting and limited visibility within the tunnels make it difficult to spot potential hazards in the distance or on the surface. Workers face difficulties walking on these slopes, increasing the risk of slipping and falling. Therefore, installing staircases can reduce the rate of slips and falls and improve passage efficiency.

[0003] However, the aforementioned existing technologies have significant limitations in practical applications: staircase equipment is mainly of a single molded unit or has a complex structure, making it inconvenient to lay in confined mine spaces and unable to meet long-distance laying requirements. For example, cast-in-place concrete staircases or welded metal staircases are not only large and non-disassembled, but also cannot be transported and turned in narrow underground turning chambers, resulting in long installation cycles and requiring destructive anchoring of the roadway sidewalls, severely impacting the flexibility and safety of mine operations. Mine operations are highly temporary and mobile; for example, the advancement of roadway faces, short-term maintenance, or the establishment of emergency rescue passages all require the rapid deployment and retrieval of staircases within a few hours. Furthermore, existing detachable staircases often use various types of connectors, resulting in a wide variety of parts. Assembling them requires repeated identification of parts, alignment of multiple interfaces, and tightening with specialized tools, making the operation cumbersome, time-consuming, and inefficient.

[0004] Therefore, there is an urgent need for a quick-assembly and disassembly staircase that can be easily and flexibly disassembled in confined mine shafts, can be laid over long distances, and has a shortened disassembly and assembly cycle, and is suitable for use on mine slopes with the fewest types of parts. Summary of the Invention

[0005] To address the technical problems of existing detachable staircases suitable for mine slopes, which often employ various types of connectors, have numerous parts, require repeated identification of parts, alignment of multiple interfaces, and fastening with various specialized tools during assembly, resulting in cumbersome and time-consuming operation and low assembly / disassembly efficiency, this invention provides a quick-assembly and disassembly staircase suitable for mine slopes with the fewest types of parts.

[0006] The first aspect of this invention provides a quick-assembly and disassembly staircase with a minimal number of parts suitable for use on mine slopes, comprising two parts: a step component and a fixing pin. The step component is provided with at least one pair of mortise and tenon joints that can interlock. One of each pair of mortise and tenon joints is located on one side of the step component along the width axis of the staircase, and the other is located on the opposite side of the step component along the width axis of the staircase. The step component is provided with at least one pair of connecting blocks and slots that can be fitted together. One of each pair of connecting blocks and slots is located at one end of the step component's tread surface along the long axis of the staircase, and the other is located at the opposite end of the step component's bottom surface along the long axis of the staircase. The bottom surface of the step component is an inclined surface placed on the mine slope. Lateral expansion of the steps is achieved through the mortise and tenon joints; longitudinal expansion of the steps is achieved by the upper and lower fitting of the step components together and the fixing pins passing through the tread surface from top to bottom and screwed to the connecting blocks.

[0007] Furthermore, the stepped component is made of engineering plastic alloy PC / ABS. And / or, the fixing pin is a self-tapping screw. And / or, the connecting block and the stepped component are integrally molded structures.

[0008] Furthermore, the staircase also includes a third component: a first side panel. The first side panel is provided with mortises and / or tenons for interlocking with mortises and / or tenons on one side of the step component.

[0009] Furthermore, the staircase also includes a fourth component: a second side panel. The second side panel is provided with mortises and / or tenons for interlocking with the mortises and / or tenons on the opposite side of the staircase component.

[0010] Furthermore, the step surface of the stepped component is fixed with several anti-slip protrusions.

[0011] Furthermore, the anti-slip protrusions are distributed in an array.

[0012] Furthermore, the bottom of the stepped component is fixed with multiple sets of reinforcing ribs.

[0013] Furthermore, the reinforcing ribs include a number of longitudinal ribs extending along the length direction of the stepped member and a number of transverse ribs extending along the width direction of the stepped member. The longitudinal ribs and transverse ribs are staggered and stacked at their intersections to form a rectangular grid-like reinforcing structure.

[0014] Furthermore, the connecting block is integrally formed on one end of the step surface along the long axis of the staircase.

[0015] Furthermore, the top of the connecting block is provided with a second pin hole for screwing into the fixing pin.

[0016] The present invention has the following advantages over the prior art: 1. By setting up two types of parts, namely step components and fixing pins, no other complex connecting parts are needed. The step components are assembled in one step along the wide axis using a mortise and tenon structure, and the fixing pins quickly lock the long axis splicing with their screw-fastening properties. The minimal number of parts simplifies the disassembly and assembly steps of the staircase, greatly improving the efficiency of disassembly and assembly, and ensuring a stable and reliable structure.

[0017] 2. By setting reinforcing ribs, the pressure distribution and equivalent frictional resistance of the contact surface between the staircase and the ramp can be optimized, enhancing the structural stability of the staircase itself. This comprehensively improves the stability of the staircase under static and dynamic conditions. It also improves the defects of tread deformation or loosening of joints caused by uneven local stress during long-term use, effectively improving the overall rigidity and torsional performance of the staircase and extending its service life.

[0018] 3. By using engineering plastic alloy PC / ABS, this material combines the high impact resistance of polycarbonate with the excellent processing fluidity of ABS, enabling the stair components to achieve lightweight while maintaining high strength. It also has excellent weather resistance and aging resistance, making the stair components easier to handle and easier to assemble and disassemble. It is not easy to deform or crack after long-term use, which can effectively extend the service life of the staircase. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first integral three-dimensional structure of the staircase provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the fixing pin provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional structure of the stepped component provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the second integral three-dimensional structure of the staircase provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of region B in the middle; Figure 6 for Figure 4 Enlarged schematic diagram of region A in the middle; Figure 7 A schematic diagram of the first side plate structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the second side plate structure provided in an embodiment of the present invention; Figure 9 This is a top view of the stepped component provided in an embodiment of the present invention.

[0020] The components include: 1. Stepped component; 2. Slot; 3. First pin hole; 4. Connecting block; 5. Second pin hole; 6. First tenon; 7. First mortise; 8. Second mortise; 9. Second tenon; 10. Anti-slip protrusion; 11. First side plate; 13. Reinforcing rib; 14. Second side plate; 17. Fixing pin. Detailed implementation method. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The terms “first,” “second,” and “third” used in this application are merely for distinguishing similar objects and do not represent a specific ordering of objects.

[0022] Embodiments of the present invention describe a quick-assembly and disassembly staircase with a minimal number of parts suitable for use on mine slopes, such as... Figure 1 and Figure 2 As shown, the quick-assembly and disassembly staircase includes two parts: step pieces 1 and fixing pins 17. Lateral expansion of the steps is achieved through the interlocking of tenons and mortises. Vertical expansion of the steps is achieved by the vertically interlocking of adjacent step pieces 1, with the fixing pins 17 passing through the tread surface from top to bottom and screwed onto the connecting block 4. In this embodiment, the staircase includes multiple steps. When the same step includes one step piece 1, the two step pieces 1 of adjacent steps are connected vertically by interlocking, and the fixing pins 17 fix the connecting block 4 of the upper step from the tread surface to the lower step. When the same step includes multiple step pieces 1, adjacent step pieces 1 must also be interlocked side-by-side using tenon and mortise interlocking.

[0023] The sloping surfaces inside mines are often covered with mud from seeping water, making it easy for workers to slip and fall. Furthermore, the high dust levels inside mines reduce visibility, making the disassembly and assembly of stairs cumbersome, time-consuming, and inefficient. Therefore, this invention provides a quick and simple method for disassembling and assembling stairs on sloping surfaces inside mines, improving the efficiency of stair assembly and disassembly.

[0024] The step component 1 is provided with at least one pair of mortises and tenons that can interlock; one of each pair of mortises and tenons is located on one side of the step component 1 along the width axis of the staircase, and the other is located on the opposite side of the step component 1 along the width axis of the staircase. In this embodiment, there are four pairs of mortises and tenons.

[0025] Please combine Figure 3 and Figure 4 The stair piece 1 can have two first mortises 7 and second mortises 8 respectively on both sides along the width axis of the staircase. The first mortises 7 and second mortises 8 can be two sets of grooves with the same shape. A second tenon 9 that is mortised and tenoned with the first mortises 7 can be fixed on one side of the stair piece 1, and a first tenon 6 that is mortised and tenoned with the second mortises 8 can be fixed on the other side of the stair piece 1. The first tenon 6 and the second tenon 9 can be integrally formed with the stair piece 1. The stair piece 1 is provided with at least one pair of connecting blocks 4 and slots 2 that can be fitted together. One of each pair of connecting blocks 4 and slots 2 is located on one end of the tread surface of the stair piece 1 along the long axis of the staircase, and the other is located on the opposite end of the bottom surface of the stair piece 1 along the long axis of the staircase. The bottom surface of the stair piece 1 is an inclined surface placed on a mine slope. The connecting block 4 can be integrally formed on one end of the tread surface of the stair piece 1 along the long axis of the staircase. A second pin hole 5 that is screwed into the top of the connecting block 4 can be provided for screwing into the fixing pin 17. A second pin hole 5 can be opened on the top of the connecting block 4. The second pin hole 5 can also be a protrusion with threads on the inner wall. The second pin hole 5 is used to fix it with the fixing pin 17. The connecting block 4 and the step piece 1 can be integrally formed. When the connecting block 4 of one lower step piece 1 is inserted into the slot 2 of another upper step piece 1, the initial form of the extended splicing of the staircase length is completed.

[0026] The tread surface of step component 1 can be provided with a first pin hole 3 communicating with the slot 2. The number of first pin holes 3 and second pin holes 5 is the same, and both the first pin holes 3 and second pin holes 5 can be through holes. After the connecting block 4 is fitted into the slot 2, the first pin holes 3 and second pin holes 5 can communicate with each other. Two adjacent step components 1 are interlocked along the width axis of the stair tread surface to complete the side-by-side splicing of the staircase. When the two step components 1 are spliced ​​in width expansion, no other parts or tools are required. The first tenon 6 is inserted into the second mortise 8 by hand, which also completes the insertion of the second tenon 9 into the first mortise 7 to achieve the interlocking splicing of the mortise and tenon connection. Since the step components 1 are laid on the slope surface and the step components 1 are of the same specification, when the step components 1 are pressed onto the slope surface, the splicing point will not be uneven due to insufficient splicing fit. The fixing pin 17 can be a self-tapping bolt, and the inner wall of the second pin hole 5 can be a through hole without threads, which facilitates better balance and fixing of the self-tapping bolt. When the self-tapping screw enters the second pin hole 5, it can achieve thread fixation with the second pin hole 5 through its own characteristics. The fixing pin 17 can also be a countersunk bolt. The countersunk bolt can be an internal hex bolt, and the inner wall of the second pin hole 5 can also be fixed with a nut that mates with the thread of the countersunk bolt, which can reduce the turning force required when fixing the fixing pin 17.

[0027] Furthermore, the material for step component 1 can be made of engineering plastic alloy PC / ABS, which combines the high strength and heat resistance of PC with the excellent processing performance and dimensional stability of ABS. Due to the high dust levels inside mines, static electricity easily accumulates, posing a risk of dust explosion should discharge. PC / ABS itself has excellent electrical insulation properties, preventing static electricity buildup and avoiding safety hazards caused by static sparks. In addition, compared to metal materials, which are susceptible to corrosion due to groundwater seepage and prolonged high humidity in mine tunnels, PC / ABS has a lower water absorption rate and maintains good dimensional stability even in humid environments. Moreover, PC / ABS is lighter than metal, which is a significant advantage for transportation and rapid disassembly and installation within confined mine shafts. Workers can move individual step components 1 by hand without relying on large lifting equipment, reducing labor intensity and increasing the speed of staircase assembly and disassembly.

[0028] Please combine Figure 5 and Figure 6After two adjacent step pieces 1 are joined together by interlocking, the fixing pin 17 can be used to fix the connecting block 4 of the upper step to the lower step from the tread surface. When extending the staircase along its long axis, first insert the connecting block 4 of the lower step piece 1 into the slot 2 of the other upper step piece 1, then pass the fixing pin 17 through the first pin hole 3 and fix it with the second pin hole 5. At this point, the splicing of the staircase along its long axis is complete. The above operation can be repeated according to the required length to complete the entire staircase installation process. When the required length of the staircase is long, the slope can be compacted in advance to improve the stability of the staircase on the long slope, avoid deformation and damage caused by uneven stress in some areas of the staircase due to uneven slope, improve the service life of the staircase, and increase the reusability of the staircase.

[0029] Multiple sets of reinforcing ribs 13 are fixed to the bottom of the step component 1. These reinforcing ribs include several longitudinal ribs extending along the length of the step component 1 and several transverse ribs extending along the width of the step component 1. The longitudinal and transverse ribs are staggered and overlapped at their intersections to form a rectangular grid-like reinforcing structure. Furthermore, since the slope inside the mine may have muddy surfaces, the reinforcing ribs 13 can increase the friction between the step component 1 and the slope through their shape characteristics, making it more stable for pedestrians walking on the surface of the step component 1. The reinforcing ribs 13 can optimize the pressure distribution and equivalent frictional resistance of the contact surface between the staircase and the slope, enhancing the structural stability of the staircase itself. This comprehensively improves the stability of the staircase under both static and dynamic conditions. It also improves defects such as tread deformation or loosening at joints caused by uneven local stress during long-term use, effectively improving the overall rigidity and torsional resistance of the staircase and extending its service life.

[0030] Please combine Figure 7 and Figure 8 The staircase may also include a third component: a first side plate 11. The first side plate 11 may be provided with mortises and / or tenons for interlocking with mortises and / or tenons on one side of the step component 1. The staircase may also include a fourth component: a second side plate 14. The second side plate 14 may be provided with mortises and / or tenons for interlocking with mortises and / or tenons on the opposite side of the step component 1. In this embodiment, there are four pairs of mortises and tenons.

[0031] The first side plate 11 can be fixed with a first tenon 6 that is mortised and tenoned to the second mortise 8. The first tenon 6 and the first side plate 11 can be integrally formed. The second side plate 14 can be fixed with a second tenon 9 that is mortised and tenoned to the first mortise 7. The second tenon 9 and the second side plate 14 can be integrally formed. After the staircase is assembled, there will be mismatched first tenons 6 and second tenons 9 on both sides of the tread surface. If these are not properly joined, it will not only affect the overall aesthetics of the staircase, but the protruding parts of the staircase edges will also pose a dangerous obstacle to pedestrians. If a toe or shoe sole gets caught, it can cause a person to lose their balance and fall. In dynamic movement such as going up and down stairs, if a pedestrian trips, the consequences are often much more serious than falling on flat ground, potentially leading to bumps, sprains, or even fractures. Furthermore, the protruding parts of the unjoined edges of the staircase bear much greater pressure than a flat surface. Long-term foot traffic will cause them to be worn down, cracked, or broken at the base more quickly. Meanwhile, pressure will be transmitted to the joint, which may cause other parts to loosen or new protrusions, accelerating the overall damage to the staircase. The first side plate 11 can be used to fit and join the unjoined second tenon 8 of the step piece 1, and the second side plate 14 can similarly fit and join the unjoined first tenon 7 of the step piece 1, preventing gaps at the edges of the staircase, improving its aesthetics, and reducing safety hazards. Since the method of joining the first side plate 11 and the second side plate 14 to the side of the step piece 1 is the same as the method of joining two sets of step pieces 1, no external tools are needed, simplifying the assembly and disassembly process.

[0032] Please combine Figure 9 The step surface of the step component 1 can be fixed with several anti-slip protrusions 10, which can be distributed in an array. The shape of the anti-slip protrusions 10 can be hemispherical or cubic. The material of the anti-slip protrusions 10 can be anti-slip abrasive particles, such as silicon carbide or quartz sand, which have high hardness, high friction, and long-lasting anti-slip effect. The material of the anti-slip protrusions 10 can also be a lighter metal material, such as stainless steel or aluminum alloy, which is characterized by its sturdiness, durability, and strong load-bearing capacity. The anti-slip effect is achieved by forming raised or serrated textures through surface embossing or punching. The material of the anti-slip protrusions 10 can also be a rubber or plastic material, such as rubber, PVC, or polyurethane, which has good elasticity, comfortable feel, and cushioning effect.

[0033] After the staircase is installed on the slope, when a pedestrian steps on the tread surface of step 1, force decomposition reveals that the pedestrian's own weight, acting on the slope surface, creates a first component parallel to the slope downwards and a second component perpendicular to the slope. When the first component acts downwards along the slope, a frictional force opposite to this force exists on the slope surface. The frictional force formula is f = μN, where μ is the coefficient of friction and N is the normal force. Since N is usually a constant value, the frictional force between the staircase and the slope can only be changed by altering the coefficient of friction. Without the reinforcing rib 13, the contact surface between step 1 and the slope surface is flat, resulting in low friction and making the staircase prone to sliding down the slope. For stable use, additional fixation between the staircase and the slope is required. The reinforcing rib 13 roughens the originally smooth contact surface, creating sharp edges. By adding the reinforcing rib 13, the pressure distribution and equivalent frictional resistance at the contact surface between the staircase and the slope can be optimized, thereby enhancing the stability of the staircase under both static and dynamic conditions.

[0034] Before the staircase is installed, workers can move several step pieces 1 to the slope and start assembling the staircase. If the assembly is carried out along the width axis of the slope first, one step piece 1 is placed on the slope surface by hand, and then the first tenon 6 of another step piece 1 is inserted into the second tenon 8 of the previous step piece 1. At this point, the staircase width expansion assembly step is completed. Then, the above steps can be repeated according to the required staircase width to complete the assembly. If the staircase is first assembled along the long axis of the slope, the lower step piece 1 is laid on the slope surface first, followed by the upper step piece 1. Then, the connecting block 4 of the lower step piece 1 is inserted into the slot 2 of the upper step piece 1. At this point, the second pin hole 5 is coaxial with the first pin hole 3. Next, the fixing pin 17 is inserted longitudinally into the first pin hole 3 and then into the second pin hole 5. When the fixing pin 17 is a self-tapping screw, it forms a threaded fixation in the second pin hole 5. It can then be tightened using an Allen wrench. If a nut is installed in the second pin hole 5, it can be tightened using an Allen wrench when the fixing pin 17 enters the second pin hole 5. The length extension of the staircase is now complete. Repeat the above steps as needed to complete the staircase length. After the staircase is laid, the first side plate 11 and the second side plate 14 are inserted along the second tenon 8 and the first tenon 7 on both sides of the staircase, respectively. The entire staircase is now laid. When disassembly is required, since the lower step 1 of the assembled staircase usually supports the upper structure, first remove the highest step 1 to prevent the upper components from falling and injuring people. First, use an Allen wrench to loosen and remove the fixing pin 17, then the slot 2 of the upper step 1 can be separated from the connecting block 4 of the lower step 1. Repeat the above steps to complete the disassembly of the staircase along the long axis of the slope. If disassembling the staircase along the wide axis of the slope, hold down one step 1 and lift the other step 1 upwards. The second tenon 9 will be pulled out of the first mortise 7, at which point the disassembly of the staircase joint is complete. The first side plate 11 and the second side plate 14 can be pressed and pulled in opposite directions with the step 1 to complete the disassembly. The entire disassembly process is the reverse of the installation process, that is, the last step in the installation is the first step in the disassembly process. If you encounter a stuck part, you can spray lubricant first and then tap it lightly with a rubber mallet. Do not use a hammer to strike it directly to avoid deformation. During the disassembly process, it is strictly forbidden to stand on an unsecured step 1.

[0035] In summary, the present invention provides a quick-assembly and disassembly staircase with minimal component types suitable for use on mine slopes. It utilizes only two components: step parts and fixing pins, eliminating the need for other complex connectors. The step parts are assembled in one step along the wide axis using a mortise and tenon structure, while the fixing pins quickly lock the long axis joints using screw fastening. This minimal component count simplifies the assembly and disassembly process, significantly improving efficiency. Furthermore, the structure is robust and reliable. This invention addresses the problems of existing detachable staircases, which often employ multiple types of connectors, resulting in numerous component types, requiring repeated identification of parts, alignment of multiple interfaces, and tightening with specialized tools during assembly. These cumbersome and time-consuming procedures lead to low assembly and disassembly efficiency. The present invention enables simple and flexible disassembly and disassembly even in confined mine spaces, accommodating long-distance installations, shortening the assembly and disassembly cycle, and greatly reducing the difficulty and efficiency of detachable staircase assembly and disassembly.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A quick-assembly and disassembly staircase with a minimal number of parts suitable for use on mine slopes, characterized in that: It includes two types of parts: a stepped part (1) and a fixing pin (17); The step component (1) is provided with at least one pair of mortise and tenon that can be interlocked; one of each pair of mortise and tenon is provided on one side of the step component (1) along the width axis of the staircase, and the other is provided on the opposite side of the step component (1) along the width axis of the staircase; the step component (1) is provided with at least one pair of connecting blocks (4) and slots (2) that can be fitted together; one of each pair of connecting blocks (4) and slots (2) is provided on one end of the step surface of the step component (1) along the long axis of the staircase, and the other is provided on the opposite end of the bottom surface of the step component (1) along the long axis of the staircase; the bottom surface of the step component (1) is an inclined surface placed on a mine slope; The lateral expansion of the steps is achieved by the interlocking of the tenon and mortise; the step pieces (1) of adjacent steps are spliced ​​together by interlocking, and the longitudinal expansion of the steps is achieved by the fixing pin (17) passing through the tread surface from top to bottom and screwing it to the connecting block (4).

2. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The stepped component (1) is made of engineering plastic alloy PC / ABS; And / or, the retaining pin (17) is a self-tapping screw; And / or, the connecting block (4) and the step part (1) are integrally formed structures.

3. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The staircase also includes a third component: a first side plate (11); the first side plate (11) is provided with mortises and / or tenons for interlocking with the mortises and / or tenons on one side of the step component (1).

4. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The staircase also includes a fourth component: a second side plate (14); the second side plate (14) is provided with mortises and / or tenons for interlocking with the mortises and / or tenons on the opposite side of the step component (1).

5. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The step component (1) has several anti-slip protrusions (10) fixed on the step surface.

6. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 5, characterized in that: The anti-slip protrusions (10) are distributed in an array.

7. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The bottom of the stepped component (1) is fixed with multiple sets of reinforcing ribs (13).

8. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 7, characterized in that: The reinforcing rib (13) includes several longitudinal ribs extending along the length direction of the stepped member (1) and several transverse ribs extending along the width direction of the stepped member (1). The longitudinal ribs and transverse ribs are staggered and stacked at the intersection to form a rectangular grid-like reinforcing structure.

9. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 1, characterized in that: The connecting block (4) is integrally formed on one end of the step surface of the step piece (1) along the long axis of the staircase.

10. The quick-assembly and disassembly staircase with a minimum number of parts suitable for use on mine slopes according to claim 9, characterized in that: The top of the connecting block (4) is provided with a second pin hole (5) that is screwed to the fixing pin (17).

Images