Special integral high-molecular pedal structure for extension ladder

Abstract

The utility model discloses a special integral type high-molecular pedal structure for an extension ladder, which comprises a pedal body, the pedal body comprises a pedal positioned in the middle and sleeves positioned on two sides of the pedal and capable of being connected with an extension column, and the pedal and the sleeves are formed into an inseparable whole by high-molecular materials through a molding technology. The pedal is smoothly connected with the sleeve through a process R corner, the pedal is provided with a treading surface, two side surfaces and a process bottom surface, the sleeve is provided with a hoop ring and a hoop ring hole, the treading surface is provided with anti-skid convex-concave and wear-resistant ribs, and the process bottom surface is provided with reinforcing ribs and an anti-deformation combination. The ladder pedal breaks through the fettering that the ladder pedal in the field of extension ladders can only be made of aluminum alloy or stainless steel, overcomes the defect that the conventional high polymer material is not suitable for being used as the ladder pedal in the field of extension ladders through meticulous tests and design improvements, and is particularly suitable for molding, low in mass production cost and remarkable in multidirectional progress.

Description

Technical Field

[0001] The utility model relates to the field of data measurement, analysis and early warning, in particular to an integral polymer pedal structure dedicated to a telescopic ladder. Background Art

[0002] The pedals of telescopic ladders are generally made of aluminum alloy or stainless steel. Metal has good dimensional stability and structural strength, can adapt to people's abuse of the pedals, and has good portability and safety. However, the connection between the aluminum alloy or stainless steel pedals and the telescopic rod body is inconvenient. The industry uses additional plastic connecting sleeves for connection. However, the industry currently has no plastic materials and structures to replace aluminum alloy or stainless steel pedals. This requires a lot of time, financial resources, energy and innovative power to try out new materials and their corresponding new structures. According to different raw material characteristics and molding process limitations, it is necessary to develop and design new structural forms to match them, so that it can be realized to manufacture telescopic ladder pedals with polymer materials.

[0003] The technical requirements for telescopic ladder treads are different from those for general stair treads. Telescopic ladder treads are used in scenarios where frequent movement is required. They must be lightweight and must withstand frequent telescopic and snap-on actions. Conventional polymer materials and conventional structural design forms cannot meet these basic requirements. Aluminum alloy and stainless steel treads have good conductivity, are easy to slip, and are easily damaged. Material fatigue damage is often sudden and unexpected, and lacks buffering in the event of a collision, which can easily lead to vibration injuries. In addition, material costs are high. Telescopic ladders are used in complex scenarios and must be able to be used in dry, wet, acidic, alkaline, and charged locations. Conventional means lack the room to reduce costs and increase efficiency.

[0004] CN201056976Y discloses a ladder and a ladder step thereof, comprising a leg tube and a ladder step, and the ladder step is installed between two leg tubes. The ladder step comprises a plastic step and a metal support rod, and the metal support rod supports and connects the plastic step. In the ladder step of the utility model technical solution, the metal support rod supports and connects the plastic step, so the ladder step not only has the two conditions of high enough support strength and large enough step surface area, but also has the following advantages: first, it reduces the manufacturing cost; second, through the fixed connection between the metal support rod and the leg tube, the ladder step and the leg tube are connected, which is convenient to connect and has high strength; although the patent adopts a plastic step, the patent also fully exposes that when a special structural design and polymer materials are not adopted and used in combination, an additional metal support rod must be added, but the plastic step with a metal support rod, or the technology of a metal support rod combined with a plastic step, is not suitable for use on a telescopic ladder that needs to be frequently extended, moved and fixed.

[0005] CN207393095U discloses a telescopic ladder for an observation deck, comprising a pedal, a telescopic mechanism, a ladder body, a crossbar, a knob, a fixing frame, a support frame, a mounting plate and a rotating shaft. The ladder structure is compactly connected and easy to use. The ladder is a telescopic structure used for climbing the observation deck. The telescopic mechanism is hydraulically controlled and has high flexibility. After the ladder is raised, the knob can be fixed to prevent the telescopic mechanism from sliding, and the firmness is high. The top of the support frame is movably connected with a rotating shaft, and the inclination angle of the support frame can be adjusted to stabilize the ladder body and prevent the ladder body from sliding and causing personal injury. The mounting plate is provided with an array of screw holes, and the support frame is firmly mounted on the crossbar by screws. The pedal is provided with an anti-skid pad to improve the safety when stepping on the pedal. The bottom of the support frame is provided with an inclined surface at a certain angle to increase the contact area between the support frame and the ground after tilting. The ladder structure is stable during operation. The ladder structure is not suitable for replacing its pedal structure with polymer materials.

[0006] CN208456486U discloses a telescopic ladder for construction, comprising an anti-skid plate, a first sleeve, a second sleeve, a third sleeve, a first pedal, a second pedal, a connecting plate, a hook, a lighting lamp, a first limiting column, a second limiting column, a control panel, a first set of rods, a second set of rods and a limiting spring, wherein the first sleeve is symmetrically fixed on the top of the anti-skid plate, T-shaped grooves are symmetrically opened at both ends of the top of the anti-skid plate, the first set of rods are slidably connected in the T-shaped grooves, the first set of rods are symmetrically fixed on a side wall of the first set of rods close to the first sleeve, the limiting spring is fixedly connected to the first sleeve at one end away from the first set of rods, the first set of rods is fixed with the first limiting column on the top side wall close to the first sleeve, the second sleeve is slidably connected in the first sleeve, and the first limiting hole is opened on the top side wall of the first sleeve. The telescopic ladder for construction is easy to carry and carry, and has good safety performance; the ladder is actually still a metal pedal ladder and cannot be replaced by a conventional plastic pedal.

[0007] CN220101165U discloses a self-unlocking telescopic ladder, comprising a ladder body, wherein the ladder body comprises a front telescopic ladder and a rear telescopic ladder; the front telescopic ladder and the rear telescopic ladder both comprise a left supporting telescopic rod and a right supporting telescopic rod, wherein the left supporting telescopic rod and the right supporting telescopic rod are both composed of a plurality of branch rod bodies, the lower portion of the upper branch rod body being inserted into the upper portion of the adjacent lower branch rod body; a pedal block is provided between the tops of each left and right corresponding branch rod bodies, a connecting block is fixed to the left and right ends of the pedal block, a stepped through hole extending upward is formed in the middle portion of the bottom surface at the outer end of the connecting block, the top of the branch rod body is clamped in the lower large-diameter hole section of the corresponding stepped through hole, and the lower portion of the upper branch rod body is inserted into the upper through hole of the stepped through hole and the top of the branch rod body; it can realize contraction after the front telescopic ladder and the rear telescopic ladder are brought together, which is convenient for storage and placement, and has a good effect, but does not provide any inspiration on the use of polymer pedals.

[0008] CN109630005A discloses a ladder that can be raised and lowered and conveniently moved, including a ladder body, a lifting device, and a moving device. The ladder body includes a manual telescopic rod, a foot pedal, a seat board, a fixed support board, a rotating shaft I, and a rotating joint; the lifting device includes a telescopic support ladder, a support ladder telescopic controller, a movable long pedal, and a fixed long pedal; the moving device includes a universal wheel, a universal wheel locking device, and a universal wheel locking controller. The pneumatic push rod device is installed on the upper part of the four legs of the ladder; the manual telescopic part is the four legs of the ladder and the support part that pushes the ladder to move; the moving device is installed at the bottom of the four legs of the ladder. The invention has a simple structure, is easy to use, and is easy to carry. It can be retracted when not in use, occupies a small space, and can be easily unfolded when in use. The height of the ladder can be appropriately increased and can be moved left and right. The technology still does not disclose any technical features and useful inspirations related to polymer pedals.

[0009] CN201377284Y discloses a plastic step aluminum ladder, which is formed by a left aluminum ladder component and a right aluminum ladder component connected by a hinge. The left aluminum ladder component and the right aluminum ladder component are respectively connected by an upper component and a lower component through a pin connection structure of their fixed seats. The upper component and the lower component are both formed by left and right main pipes supporting the plastic step, and a reinforcement pipe is arranged at the end. A reinforced middle main pipe is arranged in the middle of the plastic step. The upper end of the upper component is provided with a connection seat for overlapping with a high-position object, which is fixedly connected by a bottom bar, and the lower end of the lower component is provided with an upper bridge plate for contacting with the ground, which is connected by a rear bottom plate. The aluminum ladder is light, convenient to fold and carry, and the two aluminum ladder components are connected as one, with strong integrity and easy to move. Its bearing capacity is large enough and it is very convenient to use. It is essentially a metal step, and its plastic part is only for comfort and anti-skid, and the main function is still provided by metal aluminum.

[0010] CN216684787U discloses a composite plastic pedal, including a frame, a panel is provided on the top of the frame, ribs are installed on the bottom of the panel, anti-skid patterns are provided on the top of the panel, a heat absorbing tube is installed inside the ribs, a heat absorbing block is provided inside the heat absorbing tube, an air inlet pipe is installed at one end of the heat absorbing tube, and an air outlet pipe is provided at the other end. The composite plastic pedal, by providing a frame, a panel, ribs, water permeable holes, anti-skid patterns, and combining the air inlet pipe, the heat absorbing tube, and the heat absorbing block, can improve the stability and safety of the composite plastic pedal, prevent the pedal from icing and slipping, and reduce the operating cost and resource waste at the same time. The structural design is novel, the performance is relatively stable, and it can not only ensure the service life of the pedal, but also be beneficial to environmental protection. However, the composite plastic pedal of this technical architecture is not suitable for the field of telescopic ladders that need to be frequently moved and the use scene and environment are relatively complex.

[0011] CN202689519U discloses an anti-slip pedal, comprising a plate body and a friction pattern on the upper surface of the plate body, wherein the plate body is provided with a plurality of through holes, and both ends of the plate body are provided with positioning steps that can be spliced, and the positioning steps are provided with positioning through holes for positioning, and the friction pattern is a protrusion on the upper surface of the plate body, and has the following characteristics: (1) a striking reminder mark is provided on the pedal; (2) a through hole is provided on the pedal, which is convenient for installation and disassembly; (3) both ends of the pedal are provided with splicing positioning steps and positioning through holes, and multiple pedals can be connected into a whole, effectively preventing the pedal from sliding on the scaffolding; (4) the pedal is light in weight and adopts reinforcing ribs with rounded corners to improve the mechanical strength of the pedal; (5) the pedal is made of glass fiber reinforced polypropylene material, which has high mechanical strength and anti-slip effect and a long service life. It overcomes the defects of wooden and bamboo pedals that are prone to rot and deterioration, poor mechanical properties and short service life due to long-term outdoor use; ordinary plastic pedals are limited in mechanical strength, cannot withstand large pressure, and the friction force on the surface is relatively weak; although iron pedals have good mechanical properties, they are easy to rust and are heavy, easy to deform, and inconvenient to use. Workers often use simple pedals built at random during actual construction, which are easy to slide during construction and are very unsafe. However, this technical means is carefully designed for the construction of scaffolding in the construction process. It is spliced ​​into a large template with multiple small modules that do not move, so it is not suitable for application fields that require frequent movement and have complex usage scenarios and environments.

[0012] To sum up the above, in order to overcome the inherent defects of telescopic ladder aluminum alloy pedals and stainless steel pedals and the defects that the conventional design of conventional polymer materials cannot meet the requirements of telescopic ladder pedals, expand production capacity and assembly efficiency, and significantly reduce the overall cost, we have studied a set of integral polymer pedal structure technology dedicated to telescopic ladder pedals. Summary of the invention

[0013] The purpose of the utility model is to overcome the above problems existing in the prior art and to provide an integral polymer pedal structure specially used for a telescopic ladder. The utility model overcomes the inherent defects of aluminum alloy pedals and stainless steel pedals in the field of telescopic ladders, as well as the defects that the conventional design of conventional polymer materials cannot meet the stringent requirements of telescopic ladder pedals, and achieves the purpose of expanding production capacity and assembly efficiency and significantly reducing overall costs.

[0014] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0015] A special integral polymer pedal structure for a telescopic ladder, comprising a pedal body, wherein the pedal body comprises a pedal located in the middle and sleeves located on both sides of the pedal and capable of being connected to a telescopic column, wherein the pedal and the sleeve are formed into an inseparable whole from a polymer material by molding technology, wherein the pedal and the sleeve are smoothly connected to each other via a process R angle, wherein the pedal is provided with a treading surface, two side surfaces and a process bottom surface, wherein the sleeve is provided with a hoop and a hoop hole, wherein the treading surface is provided with anti-slip convexo-concave and wear-resistant ribs, and wherein the process bottom surface is provided with reinforcing ribs and an anti-deformation combination.

[0016] Preferably, when the distance between the two side surfaces of the pedal is approximately equal to the outer diameter of the sleeve, the process R angle of the connection is zero; when the distance between the two side surfaces of the pedal is greater than or less than the outer diameter of the sleeve, the process R angle of the connection is greater than 0.5 mm.

[0017] Preferably, the tread surface is 10-150CM long, 5-30CM wide, 2-15CM high, and 0.2-5.5mm thick. The polymer material is PE, PP, ABS or PA, and 0-50% of calcium carbonate or glass fiber reinforcement can be added.

[0018] Preferably, the anti-skid protrusions and depressions include transverse and longitudinal protrusions or depressions, which are used to prevent people from stepping on the pedals to generate lateral forces, thereby preventing the soles of the feet from sliding laterally or longitudinally, causing unstable center of gravity and falling.

[0019] Preferably, the wear-resistant ribs are divided into primary wear-resistant ribs and secondary wear-resistant ribs. The primary wear-resistant ribs are ribs on a protruding plane, and the secondary wear-resistant ribs are planes with depressions or grooves around them. The primary wear-resistant ribs and the secondary wear-resistant ribs are distributed at intervals, so that after the primary wear-resistant ribs are worn out, the sole of the foot can still contact the secondary wear-resistant ribs and continue to provide anti-slip and wear-resistant functions.

[0020] Preferably, the reinforcing ribs include unidirectional reinforcing ribs and cross reinforcing ribs, the cross-section of the reinforcing ribs is a triangle or trapezoid with rounded corners, the maximum thickness of the ribs is less than 10 mm, and the minimum thickness of the ribs is greater than 0.5 mm.

[0021] Preferably, the anti-deformation combination is composed of a cross combination of anti-deformation metal inserts or reinforcing ribs.

[0022] Preferably, the hoop wraps around and covers the telescopic column, and the projection along the direction of the telescopic column is circular, elliptical, polygonal, approximately polygonal, multi-pointed star or any petal combination.

[0023] Preferably, the hoop hole and the telescopic column are loosely matched, and the hole diameter is more than 0.1 mm larger than the outer diameter of the matching telescopic column. The hoop hole is evenly provided with more than one deformable interference fit ribs to facilitate the clamping of the telescopic column and eliminate the looseness of the hoop hole caused by the gap.

[0024] Preferably, the two side surfaces are provided with decorative textures and / or external decorative assembly process convex and concave holes, and the mounting changes the appearance shape and surface quality.

[0025] The beneficial effects of the utility model are:

[0026] (1) It overcomes the inherent defects of aluminum alloy pedals and stainless steel pedals in the field of telescopic ladders, as well as the defects that the conventional design of conventional polymer materials cannot meet the stringent requirements of telescopic ladder pedals. It has a wide range of applications, fast molding speed, fast assembly speed, and good weather resistance and deformation resistance;

[0027] (2) Anti-slip and wear-resistant, with various reinforcement methods, can be pre-installed or supplemented later, strong anti-destruction ability, and greatly extended service life;

[0028] (3) Compared with the current aluminum alloy pedals and stainless steel pedals, the appearance and structure can be complex or simple, the design freedom is high, the mass production cost is low, and the economic benefits are significant;

[0029] (4) It is more environmentally friendly, avoids pollution, and can be recycled many times.

[0030] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0032] Figure 1 This is a schematic diagram of the assembly relationship between the integral polymer pedal and the telescopic column of the utility model;

[0033] Figure 2 This is a bottom view schematic diagram of an integral polymer pedal according to an embodiment of the utility model;

[0034] Figure 3 This is a normal cross-sectional schematic diagram of an integral polymer pedal according to an embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the assembly relationship between the pedal hoop and the telescopic column in one embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the distribution of multiple wear-resistant structures in one embodiment of the utility model;

[0037] Figure 6 This is a partially enlarged schematic diagram of the back side of the hoop position of an embodiment of the utility model;

[0038] Figure 7 This is a partially enlarged schematic diagram of the front side of the hoop position of an embodiment of the utility model;

[0039] Figure 8 This is a front view of a finished product after assembly of an embodiment of the utility model;

[0040] Fig. 9 The figure is a top view schematic diagram of the final assembled product after assembly of one embodiment of the utility model.

[0041] Explanation of numbers in the figure: 1. pedal; 2. sleeve; 3. telescopic column; 11. tread surface; 12. two side surfaces; 13. process bottom surface; 21. hoop; 22. hoop hole; 23. anti-loosening rib; 111. anti-slip bumps; 112. wear-resistant rib; 131. reinforcing rib; 132. anti-deformation combination; 1121. primary wear-resistant rib; 1122. secondary wear-resistant rib; 1123. depression or groove. DETAILED DESCRIPTION

[0042] The utility model is further described below in conjunction with the accompanying drawings:

[0043] Reference Figures 1 to 9 As shown, an integral polymer pedal structure specially used for a telescopic ladder includes a pedal body, wherein the pedal body includes a pedal located in the middle and sleeves 2 located on both sides of the pedal 1 and capable of being connected to a telescopic column 3, wherein the pedal 1 and the sleeve 2 are formed into an inseparable whole by a polymer material through molding technology, wherein the pedal 1 and the sleeve 2 are smoothly connected to each other through a process R angle, wherein the pedal 1 is provided with a treading surface 11, two side surfaces 12 and a process bottom surface 13, wherein the sleeve 2 is provided with a hoop 21 and a hoop hole 22, wherein the treading surface 11 is provided with anti-slip convexo-concave portions 111 and wear-resistant ribs 112, and wherein the process bottom surface 13 is provided with reinforcing ribs 131 and an anti-deformation combination 132.

[0044] Preferably, when the distance between the two side surfaces 12 of the pedal 1 is approximately equal to the outer diameter of the sleeve 2, the process R angle of the connection is zero; when the distance between the two side surfaces 12 of the pedal 1 is greater than or less than the outer diameter of the sleeve 2, the process R angle of the connection is greater than 0.5 mm.

[0045] Preferably, the treading surface 11 is 10-150CM long, 5-30CM wide, 2-15CM high, and 0.2-5.5mm thick. The polymer material is PE, PP, ABS or PA, and 0-50% of calcium carbonate or glass fiber reinforcement can be added. Among them, in general scenarios, the treading surface is 30-60CM long, 10-20CM wide, 5-10CM high, and 1.5-2.5mm thick. The polymer material is PP or PA, and adding 15-30% of calcium carbonate or glass fiber reinforcement is the best choice.

[0046] Preferably, the anti-skid protrusions and depressions 111 include transverse and longitudinal protrusions or depressions, which are used to prevent people from stepping on the pedals to generate lateral forces, thereby preventing the soles of the feet from sliding laterally or longitudinally, causing unstable center of gravity and falling.

[0047] Preferably, the wear-resistant ribs 112 are divided into primary wear-resistant ribs and secondary wear-resistant ribs. The primary wear-resistant ribs are ribs on a protruding plane, and the secondary wear-resistant ribs are planes with depressions or grooves around them. The primary wear-resistant ribs and the secondary wear-resistant ribs are distributed at intervals, so that after the primary wear-resistant ribs are worn out, the sole of the foot can still contact the secondary wear-resistant ribs and continue to provide anti-slip and wear-resistant functions.

[0048] Preferably, the reinforcing ribs 131 include unidirectional reinforcing ribs and cross reinforcing ribs. The cross-section of the reinforcing ribs is a triangle or trapezoid with rounded corners. The maximum thickness of the rib is less than 10 mm, and the minimum thickness is greater than 0.5 mm. The best combination is that the maximum thickness is less than 5 mm and the minimum thickness is greater than 1.5 mm. This can effectively avoid shrinkage pits caused by uneven thickness, and can fully and quickly fill the mold to avoid burning caused by missing rib molding or poor local exhaust.

[0049] Preferably, the anti-deformation combination 132 is composed of a cross combination of anti-deformation metal inserts or reinforcing ribs 131. In situations where heavy loads are often required, anti-deformation metal inserts should be the optimal solution.

[0050] Preferably, the hoop 21 wraps around and covers the telescopic column 3, and its projection along the telescopic column direction is circular, elliptical, polygonal, approximately polygonal, multi-pointed star or any petal combination, etc., which increases the freedom of design of the telescopic ladder and beautifies the product appearance.

[0051] Preferably, the hoop hole 22 and the telescopic column 3 are loosely matched, and the hole diameter is larger than the outer diameter of the telescopic column by more than 0.1 mm, which is convenient and easy to assemble and insert. The hoop hole is evenly provided with more than 3 deformable interference fit ribs, which are convenient for clamping the telescopic column 3. The interference squeeze deformation of the ribs is used to eliminate the looseness of the hoop hole caused by the gap, which is also called anti-loosening rib.

[0052] Preferably, the two side surfaces 12 are provided with decorative textures and / or convex and concave columns of external decorative assembly process, and the mounting changes the appearance shape and surface quality. Because polymer materials are used for molding, it is easy to achieve surface molding of various appearance shapes through carving molds, which greatly improves the designer's freedom in appearance design.

[0053] The utility model has a wide scope of application. It can be used in basically all scenarios where a pedal is needed and the length of the pedal is less than 1.5 meters. It is suitable for both static loads and dynamic loads, and for both light load and heavy load scenarios. It can form pedals with simple structure and appearance at low cost, and can also form pedals of handicraft grade with very complex and beautiful structure and appearance at low cost. The disadvantage is that it cannot adapt to special customization of small batches, and the structural design requires rich experience and a lot of experimental attempts. It cannot be designed and formed casually as it is taken for granted. The advantage is that when mass-produced, the production cost is very low, the forming speed is very fast, and the quality stability is extremely high. After forming, the pedals are slowly cooled by soaking in hot water to eliminate stress, and the effect is better.

[0054] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. An integral polymer pedal structure for a telescopic ladder, comprising a pedal body, wherein the pedal body comprises a pedal located in the middle and sleeves (2) located on both sides of the pedal (1) and capable of being connected to a telescopic column (3), characterized in that: The pedal (1) and the sleeve (2) are formed into an inseparable whole from polymer materials by molding technology; the pedal (1) and the sleeve (2) are smoothly connected via a process R angle; the pedal (1) is provided with a treading surface (11), two side surfaces (12) and a process bottom surface (13); the sleeve (2) is provided with a hoop (21) and a hoop hole (22); the treading surface (11) is provided with anti-slip convexoconcave surfaces (111) and wear-resistant ribs (112); the process bottom surface (13) is provided with reinforcing ribs (131) and an anti-deformation combination (132).

2. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: When the distance between the two side surfaces (12) of the pedal (1) is approximately equal to the outer diameter of the sleeve (2), the process R angle of the connection is zero; when the distance between the two side surfaces (12) of the pedal (1) is greater than or less than the outer diameter of the sleeve (2), the process R angle of the connection is greater than 0.5 mm.

3. The integral polymer pedal structure for a telescopic ladder according to claim 2, characterized in that: The treading surface (11) is 10-150cm long, 5-30cm wide, 2-15cm high, and has a wall thickness of 0.2-5.5mm.

4. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: The anti-slip convexo-concave (111) includes transverse and longitudinal convexo-concave.

5. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: The wear-resistant ribs (112) are divided into primary wear-resistant ribs (1121) and secondary wear-resistant ribs (1122). The primary wear-resistant ribs are ribs protruding from a plane, and the secondary wear-resistant ribs are planes with depressions or grooves (1123) around them. The primary wear-resistant ribs and the secondary wear-resistant ribs are distributed at intervals.

6. The integral polymer step structure for a telescopic ladder according to claim 1, characterized in that: The reinforcing ribs (131) include unidirectional reinforcing ribs and cross reinforcing ribs. The cross-section of the reinforcing ribs is a triangle or a trapezoid with rounded corners. The maximum thickness of the ribs is less than 10 mm, and the minimum thickness of the ribs is greater than 0.5 mm.

7. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: The anti-deformation combination (132) is composed of a cross combination of anti-deformation metal inserts or reinforcing ribs (131).

8. The integral polymer step structure for a telescopic ladder according to claim 1, characterized in that: The hoop (21) wraps around and covers the telescopic column (3), and its projection along the direction of the telescopic column is circular, elliptical, polygonal, approximately polygonal, multi-pointed star, or any petal combination shape.

9. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: The hoop hole (22) and the telescopic column (3) are loosely matched, and the hole diameter is larger than the outer diameter of the matched telescopic column by more than 0.1 mm. The hoop hole is evenly provided with more than three deformable interference fit ribs, which facilitates the clamping of the telescopic column (3) and eliminates the looseness of the hoop hole caused by the gap.

10. The integral polymer pedal structure for a telescopic ladder according to claim 1, characterized in that: The two side surfaces (12) are provided with decorative textures and / or convex and concave holes and columns of external decorative assembly technology, and the appearance shape and surface quality are changed by mounting.

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