Deformation-resistant easily-detected special macromolecular pedal structure for extension ladder

Abstract

The utility model discloses an anti-deformation easily-detected special macromolecular 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 a telescopic column, and the pedal body is integrally formed by macromolecular materials through a molding technology. The functional modules cannot be separated, the pedal is provided with a treading surface, two side surfaces and a process bottom surface, and the treading surface and / or the process bottom surface are / is provided with an anti-deformation structure and a detection process reference basis. The high polymer material is used for replacing a metal material to manufacture the pedal of the extension ladder, so that the creep deformation characteristic influence of the high polymer material can be effectively resisted, and some reference standards easy to detect and compare are set for avoiding misjudgment and accurately evaluating the safety of the current high polymer pedal of the extension ladder, so that the risk can be controlled at any time.

Description

Technical Field

[0001] The utility model relates to the field of data measurement, analysis and early warning, in particular to a special polymer pedal structure for a telescopic ladder which is resistant to deformation and easy to detect. Background Art

[0002] Fatigue characteristics of metal materials: Metal fatigue refers to the process in which materials and components gradually produce local permanent cumulative damage in one or several places under cyclic stress or cyclic strain, and cracks or sudden complete fractures occur after a certain number of cycles. When materials and structures are subjected to repeated changing loads, even if the stress value does not exceed the strength limit of the material, or even lower than the elastic limit, damage may occur. This phenomenon of material and structure damage under repeated alternating loads is called metal fatigue damage.

[0003] Creep characteristics of polymer materials: The creep of polymer materials is the phenomenon that the deformation of polymer materials gradually increases with time under the action of a certain temperature and a small constant external force (tension, pressure or torsion, etc.). The creep process includes the following three deformations: When a polymer material is subjected to an external force, the bond length and bond angle inside the molecular chain change immediately. This deformation is very small and is called general elastic deformation. The deformation that occurs when the molecular chain gradually stretches through the movement of the chain segment is called high elastic deformation. If there is no chemical cross-linking between molecules, relative slip will occur between linear polymers, which is called viscous flow. This flow is related to the bulk viscosity of the material. Below the glass transition temperature, the relaxation time of the chain segment movement is very long, and the internal friction resistance between molecules is very large, so general elastic deformation mainly occurs. Above the glass transition temperature, general elastic deformation and high elastic deformation mainly occur. When the temperature rises above the viscous flow temperature of the material, these three deformations are more significant. Since viscous flow cannot be restored, for linear polymers, when the external force is removed, a part of the deformation that cannot be restored will be left, which is called permanent deformation.

[0004] Therefore, because the fatigue properties of metal are completely different from the creep properties of polymer materials, when polymer materials are used instead of metal materials to make telescopic ladder pedals, conventional technical means cannot be directly used and referenced. The technical risks of blind substitution are very serious. Therefore, it is necessary to modify and design the telescopic ladder pedal structure that conforms to the characteristics of polymer materials, otherwise there will be serious failure risks.

[0005] 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. Different raw material characteristics and molding process limitations require the research and development of new structural forms to match them.

[0006] CN208339291U discloses a foldable dining chair, comprising a seat portion, a connecting shaft, a footrest and chair legs; the front legs, rear legs, backrest frame and footrest, through the unique design of the matching structure at the connecting shaft, the dining chair has more diverse usage states, and the adjustment of the dining chair between various states and the overall folding operation also become easier; and the processing cost is relatively low.

[0007] CN102811777A discloses a snowboard comprising an elongated board element having an upper surface, a lower surface and a pair of side edges, wherein the pair of side brake pedals extend below the lower surface of the board element, and also provides a foot brake conversion accessory and a method for converting a conventional snowboard into a snowboard with a foot brake, so that skateboarders will be able to stand in any position they desire, not just the sometimes awkward side-standing posture required by existing snowboards.

[0008] CN108797908A discloses an assembled staircase and its installation method and construction method of a building project. The assembled staircase includes at least one middle section for stepping and climbing step by step, a top section for fixing the middle section with the upper ground or platform, and a first connecting device for fixing the middle section with the lower ground or platform. The middle section and / or the top section are assembled to form an integral structure; the connecting end surface of the middle section and the connecting end surface of the top section are connected and fixed by a first adjusting mechanism for controlling the longitudinal length of the assembled staircase. The integral components of the assembled staircase are assembled structures, and the length of the staircase is controlled by splicing the sections, which is convenient for installation, disassembly and transportation, and convenient for turnover and reuse. CN216741321U discloses a novel triangular insulating telescopic ladder that is easy to carry, comprising a supporting shell and a stopper, a non-slip base is fixed below the supporting shell, a non-slip sleeve is fixed above the telescopic rod, a pedal is connected to the side of the insulating device, a knob is arranged below the pedal, and a connecting rod is connected above the knob, the stopper is fixed to the side of the connecting rod, and a slot is arranged below the stopper. The portable insulating telescopic ladder is convenient for rapid telescopic operation, convenient for insulation protection measures, and convenient for anti-slip and stable measures during use. CN205330144U discloses a durable foot pedal with high safety for a building scaffold, comprising a flame retardant extruded foot pedal and a scaffolding pole, wherein the top surface of the flame retardant extruded foot pedal is provided with a wear-resistant coating, the top surface of the flame retardant extruded foot pedal is provided with neatly arranged anti-skid convex holes, the inner cavity of the flame retardant extruded foot pedal is provided with a reinforcement component, and the bottom of the flame retardant extruded foot pedal is densely and evenly distributed with buckles laterally arranged. The utility model has high safety, durability and long service life, high overall strength of the foot pedal, strong anti-aging and pressure resistance, making the foot pedal more durable, thereby extending its service life, preventing the foot pedal from breaking and causing collapse accidents when stepped on for a long time, effectively ensuring the personal safety of construction workers, and improving the safety of foot pedal use. CN209870252U discloses an anti-slip truck step ladder, whose structure includes a U-shaped rod, a handle cover, an armrest, a connecting piece, a rotating rod, a pedal, a first connecting strip, a balancing rod, a fixing device and a stable base. The utility model achieves a more stable connection between the step ladder and the truck, reduces the generation of safety hazards, greatly ensures the beneficial effects of use, and achieves that the bottom end of the step ladder is not easy to slide, reducing the generation of safety hazards.CN217564588U discloses a multi-layer co-extruded composite marine pedal, including a pedal body, a plurality of independent hollow chambers are arranged through the interior of the pedal body, a wear-resistant layer is arranged on the upper plane of the pedal body, a plurality of anti-skid protrusions are evenly arranged on the wear-resistant layer along the length direction of the pedal body, and a plurality of anti-skid grooves are evenly arranged on the anti-skid protrusions along the width direction of the pedal body; limiting protrusions are arranged in the hollow chambers on both sides of the pedal body, and a reinforcement layer is also arranged inside the pedal body; the utility model extends the service life of the marine pedal, improves the antioxidant ability, strength and anti-skid performance of the marine pedal, reduces the difficulty of production and manufacturing, and has low production costs, but the above design changes and innovations obviously do not take into account the ladder pedal structure and the characteristics of polymer materials in the use scenario of the telescopic ladder, and cannot be easily used in the field of telescopic ladder pedals.

[0009] CN208669005U discloses an assembled bridge inspection safety staircase that is easy to install and disassemble, comprising a fixed module, the fixed module is vertically fixedly connected to a support column, the bottom end of the support column is fixedly connected to a lower crossbeam, the upper end of the support column is fixedly connected to an upper crossbeam, a ladder is clamped between the lower crossbeam and the upper crossbeam, a pedal is welded inside the ladder, a fixed module second is fixedly placed on the upper end of the fixed module, a fixing device is sleeved at the fixed module connecting the fixed module to the fixed module second, a lifting ring is fixedly connected to the fixed module at the fixed module connecting the fixed module to the fixed module second, a safety rope is fixedly connected to the lower end of the lifting ring, a safety belt is fixedly connected to the lower end of the safety rope, an adjustment buckle is fixedly arranged on the outside of the safety belt, a card joint is matched with the left side of the safety belt, and a card interface is matched with the right side of the safety belt. The practical assembled bridge inspection safety staircase that is easy to install and disassemble has the advantages of easy installation and disassembly, free height adjustment, and safety protection measures. CN213807531U discloses a ladder lifting device, which solves the problem that the ladder column of the existing ladder may be deformed during the ladder fall detection process, thereby affecting the subsequent lifting function of the ladder. The ladder lifting device includes a first ladder column, a second ladder column and a lifting device, wherein the first ladder column and the second ladder column are fixedly connected by the lifting device, and the lifting device includes a fixing member, wherein a convex ring is arranged in one end of the fixing member, and a protective structure is arranged on the fixing member to prevent the convex ring from being deformed by external force. The utility model has reasonable design, simple installation, convenient use, high safety, long service life, anti-collision, and easy replacement of ladder columns. The four convex points on the first ladder column directly contact the second ladder column and are clamped with the convex ring of the lifting device on the second ladder column. The lifting device is provided with a protective structure to prevent the ladder from being bumped during testing, so that the ladder column and the convex ring are deformed, and the lifting function of the ladder is affected. Several fixing points are arranged on the fixing part, and the fixing points adopt a pryable structure design. When the ladder column is damaged, the damaged ladder column can be directly replaced without taking out all the ladder columns for replacement. It is convenient for customers to repair, and the ladder does not need to be sent back to the factory for repair. The repair speed is 10 times faster than before. CN117027624A discloses a safety ladder, including: a ladder body and a pedal pressure sensor, a plurality of the pedal pressure sensors are arranged on the foot pedal of the ladder body; a hand-held pressure sensor, the hand-held pressure sensor is arranged on the vertical rod of the ladder body; an alarm device, and the alarm device is respectively connected to the hand-held pressure sensor and the pedal pressure sensor.The safety ladder designed in this application effectively reduces various risks when workers use ladders for climbing operations by giving voice alarm prompts when there are workers on the ladder but the guardian is not on the scene to hold the ladder. CN205063791U discloses a multifunctional three-section ladder, including a tool storage rack, an anti-skid foot pad, an anti-skid pedal, a U-shaped support frame, an anti-skid cover, an anti-skid rubber pad, a pressure sensor, a support rod, a connecting rod, an auxiliary support frame, a rotating shaft, an energy-saving lamp, and an anti-skid handrail. The two sides of the U-shaped support frame are respectively connected to the two sides of the auxiliary support frame by hinges, and the upper part of the U-shaped support frame is provided with an anti-skid handrail. The bottom of the two lower brackets of the U-shaped support frame are both provided with anti-skid covers. The anti-skid pedal is sequentially installed between the two lower brackets of the U-shaped support frame from bottom to top, and the tool storage rack is installed above the anti-skid pedal. The utility model adopts the design of a pressure sensor to detect the pressure of the entire ladder. When the pressure exceeds the overall bearing capacity of the ladder, the signal is transmitted to the alarm device on the tool storage rack to complete the alarm, thereby improving the service life of the ladder.

[0010] In summary, when using polymer materials to replace aluminum alloy and stainless steel to make telescopic ladder pedals, the specific structural design of the pedals needs to be substantially modified and verified, and appropriate and accurate preventive measures should be taken in advance. Conducting abuse risk tests and confirmation in advance can avoid a lot of losses and save a lot of regrets. To this end, we have studied a special polymer pedal structure for telescopic ladders that is resistant to deformation and easy to detect. Summary of the invention

[0011] The purpose of the utility model is to overcome the above problems existing in the prior art and to provide a special polymer pedal structure for a telescopic ladder which is resistant to deformation and easy to detect. The structural design and technical feature layout of the utility model can use polymer materials instead of metal materials to manufacture telescopic ladder pedals, and effectively resist the influence of the creep deformation characteristics of the polymer materials. After long-term use or when frequently overloaded, due to the influence of the creep deformation characteristics of the polymer materials, there will still be a slow cumulative effect of safety deformation. The cumulative deformation caused by the creep deformation characteristics does not belong to the current elastic deformation under force. In order to avoid misjudgment and accurately evaluate the safety of the current telescopic ladder polymer pedal, some reference benchmarks that are easy to detect and compare are set, which can be controlled at any time.

[0012] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0013] A polymer pedal structure specially used for a telescopic ladder that is resistant to deformation and easy to detect comprises 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 body is formed as a whole from a polymer material by molding technology, and the functional modules are inseparable, and the pedal is provided with a treading surface, two side surfaces and a process bottom surface, wherein the treading surface and / or the process bottom surface are provided with an anti-deformation structure and a detection process reference datum.

[0014] Preferably, the anti-deformation structure is one or more of an anti-deformation shape design, an anti-deformation rib combination, an anti-deformation position distribution and an anti-deformation insert.

[0015] Preferably, the anti-deformation shape design includes the convex and concave rib groove reinforcement design of the tread surface and the arc or arch curve design of the cross section, as well as the shape and position distribution design of the reinforcement ribs of the process bottom surface.

[0016] Preferably, the anti-deformation rib combination includes a combination of vertical ribs crossing vertically and horizontally and a combination of mesh-shaped angled cross ribs, as well as a position distribution combination of the rib combination.

[0017] Preferably, the anti-deformation position distribution includes the edge and N equally divided points of the treading surface, the edge and N equally divided points of the process bottom surface, and the joint between the pedal and the sleeve.

[0018] Preferably, the anti-deformation insert is a metal insert, a polymer insert, a fiber mesh or a bamboo or wood insert, and is provided with convex or concave or corner reinforcement technical features, and unidirectional or bidirectional reinforcement.

[0019] Preferably, the detection process reference datum includes a cumulative deformation detection reference datum and a standard load real-time deformation detection reference datum, which are used to detect or warn the real-time safety status of the pedal body.

[0020] Preferably, the cumulative deformation detection reference benchmark is used to display or warn the cumulative deformation between the factory state of the pedal body and the real-time state of the pedal body. When the cumulative deformation of a pedal body is large enough and is in the warning area, the pedal body should be immediately inspected or replaced.

[0021] Preferably, the standard load real-time deformation detection reference benchmark is used to detect the deformation value of the current pedal body between the benchmark points before and after the standard load is placed. When the deformation amount is within the allowable range, it can be used safely. When the deformation amount is within the warning range, it should be immediately repaired or replaced. When the deformation amount exceeds the warning range, the pedal body should be replaced immediately, or the telescopic ladder should be immediately deactivated.

[0022] Preferably, it also includes a risk alarm device, which is a deformation warning mark or a deformation alarm sensor, which is pasted or pre-buried on the tread surface or the appearance surface of both sides.

[0023] Preferably, the pedal surface is provided with anti-skid bumps and wear-resistant ribs, the anti-skid bumps include transverse and longitudinal protrusions or depressions, which are used to prevent people's feet from sliding laterally or longitudinally when there is lateral force on the pedal, causing unstable center of gravity and falling, and the wear-resistant ribs are divided into primary wear-resistant ribs and secondary wear-resistant ribs. The primary wear-resistant ribs are ribs protruding from the plane, and the secondary wear-resistant ribs are planes with depressions or grooves around them. The primary wear-resistant ribs and secondary wear-resistant ribs are distributed at intervals, so that after the primary wear-resistant ribs are worn out, the pedals begin to contact the secondary wear-resistant ribs, which is anti-skid and wear-resistant.

[0024] Preferably, the sleeve is provided with a hoop and a hoop hole, the hoop wraps around and covers the telescopic column, the hoop hole and the telescopic column are loosely matched, 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 one deformable interference fit ribs, which is convenient for clamping the telescopic column and eliminating the looseness of the hoop hole due to the gap, and the projection of the hoop along the direction of the telescopic column is circular, elliptical, polygonal, approximately polygonal, polygonal star or any petal combination.

[0025] Preferably, the two side surfaces 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.

[0026] The beneficial effects of the utility model are:

[0027] (1) Using polymer materials instead of aluminum alloy materials and stainless steel materials to make telescopic ladder pedals can greatly reduce material costs and greatly liberate the freedom of appearance design of telescopic ladder pedals. Telescopic ladder pedals with complex appearances can be formed at low cost and are suitable for mass and efficient production;

[0028] (2) Through targeted structural design modification and verification of the mechanical model and environmental factors of telescopic ladders, the influence of polymer creep deformation characteristics was overcome, making it safe and reliable to use polymer materials to replace aluminum alloy materials and stainless steel materials in the field of telescopic ladders;

[0029] (3) Multiple easily detectable technical features are provided to compare and evaluate in real time the effects of creep deformation characteristics and elastic deformation of the telescopic ladder steps, thereby confirming the safety of the telescopic ladder.

[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 It is a schematic diagram of the assembly relationship between the pedal and the telescopic column of the telescopic ladder of the utility model;

[0033] Figure 2 This is a schematic diagram of the anti-deformation shape structure design and position distribution of the utility model;

[0034] Figure 3 This is a schematic diagram of the easy-to-detect reference position and setting form of the utility model;

[0035] Figure 4 This is a schematic diagram of the anti-deformation shape structure design of an embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the anti-deformation shape structure design and position distribution of the utility model;

[0037] Figure 6 This is a schematic diagram of the anti-deformation shape structure design and position distribution of the utility model;

[0038] Figure 7 It is a bottom view schematic diagram of the utility model after complete assembly;

[0039] Figure 8 It is a top view schematic diagram of the utility model after complete assembly;

[0040] Fig. 9 This is a partial enlarged schematic diagram of the position of the pedal sleeve of a telescopic ladder in one embodiment of the utility model;

[0041] Fig.10 It is a schematic diagram of a convex-concave or corner reinforcement technical feature of the utility model;

[0042] Fig.11 This is a schematic diagram of an embodiment of an easy-to-detect reference position and setting form of the utility model;

[0043] Fig.12This is a schematic diagram of the easy-to-detect reference position and setting form of an embodiment of the utility model. Explanation of the numbers in the figure: 1, pedal; 2, sleeve; 3, telescopic column; 4, anti-deformation structure; 5, detection process reference; 11, tread surface; 12, two side surfaces; 13, process bottom surface; 21, hoop; 22, hoop hole; 41, anti-deformation shape design; 42, anti-deformation rib combination; 43, anti-deformation position distribution; 44, anti-deformation insert; 51, cumulative deformation detection reference; 52, standard load real-time deformation detection reference; 111, anti-slip convex and concave; 112, wear-resistant ribs; 421, vertical rib combination; 422, mesh angle cross rib combination; 423, rib combination; 441, convex and concave; 442, corner. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the accompanying drawings:

[0045] Reference Figures 1 to 12 As shown, the special polymer pedal structure for telescopic ladders that is resistant to deformation and easy to detect is formed into an inseparable whole by a polymer material through molding technology. The pedal 1 includes a treading surface 11, two side surfaces 12 and a process bottom surface 13. The treading surface 11 and the process bottom surface 13 are provided with an anti-deformation structure 4 and a detection process reference datum 5. The anti-deformation structure 4 includes an anti-deformation shape design 41, an anti-deformation rib combination 42, an anti-deformation position distribution 43 and an anti-deformation insert 44. The anti-deformation shape design 41 mainly includes convex and concave rib grooves distributed on the treading surface 11 and a profile of an arc or arch curve. The design and the shape and position distribution of the reinforcing ribs on the process bottom surface 13 are designed. The anti-deformation rib combination 42 includes a vertical cross rib combination 421 and a mesh angle cross rib combination 422, and a position distribution combination of the rib combination 423. The anti-deformation position distribution 43 includes the edge and N equally divided points of the tread surface 11, the edge and N equally divided points of the process bottom surface 13, and the joint of the pedal 1 and the sleeve 2. The anti-deformation insert 44 is a metal insert, a polymer insert, a fiber mesh or a bamboo insert. When heavy load is required, the mechanical model structure of the telescopic ladder can be as follows Figure 2 , Figure 4-Figure 6As shown, additional technical features such as convexoconcave 441 or corner 442 are provided for strengthening, and unidirectional or bidirectional strengthening is performed. The detection process reference datum 5 includes a cumulative deformation detection reference datum 51 and a standard load real-time deformation detection reference datum 52, which are used to detect or warn the real-time safety status of the pedal body. The cumulative deformation detection reference datum 51 is used to display or warn the cumulative deformation between the factory state of the pedal body and the real-time state of the pedal body. When the cumulative deformation of a pedal body is large enough and is in the warning area, the pedal body should be immediately repaired or replaced. The standard load real-time deformation detection reference datum 52 is used to detect the current pedal body. The deformation value between the reference points before and after the standard load is placed on the board body can be used safely when the deformation is within the allowable range. When the deformation is within the warning range, it should be repaired or replaced immediately. When the deformation exceeds the warning range, whether it is the cumulative deformation detection reference datum 51 or the standard load real-time deformation detection reference datum 52, it exceeds the safety standard range, the pedal body should be replaced immediately, or the telescopic ladder should be stopped immediately. The risk alarm device can adopt a deformation warning sign or a deformation alarm sensor. The deformation warning sign can be pasted on the two side surfaces 12, or the deformation alarm sensor can be pre-buried in the treading surface 1 1, the tread surface 11 is provided with anti-skid convexo-concave 111 and wear-resistant ribs 112, the anti-skid convexo-concave 111 includes transverse and longitudinal protrusions or depressions, which not only has the strengthening effect of anti-deformation, but also can be used to prevent people from stepping on the pedal with lateral force, avoiding the foot from sliding along the transverse or longitudinal direction, causing unstable center of gravity and falling, the wear-resistant ribs 112 are divided into primary wear-resistant ribs and secondary wear-resistant ribs, the primary wear-resistant ribs are ribs protruding from the plane, 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, and after the primary wear-resistant ribs are worn out, the foot begins to contact the secondary wear-resistant ribs, which is anti-skid, wear-resistant and wear-resistant. The ribs 112 also have a reinforcing effect of resisting deformation. The sleeve 2 of the telescopic ladder pedal is provided with a hoop 21 and a hoop hole 22. The hoop 21 is used to wrap and cover the telescopic column 3. The hoop hole 22 and the telescopic column 3 are loosely matched, which is convenient for assembly and insertion. The hole diameter is larger than the outer diameter of the matching telescopic column by more than 0.1mm. Too large a gap is not good, and it should not exceed 0.5mm, otherwise it will cause the assembly of the telescopic rod and the telescopic ladder pedal to be loose, and there will be a feeling of unsteadiness when stepping on it. In order to eliminate the gap caused by the loose fit, the hoop hole 22 is evenly provided with deformable interference fit ribs, the number of which is more than 3, the rib width does not exceed 5mm, and the interference amount should not exceed 0.5mm, which is convenient for the deformation sleeve to clamp the telescopic column 3 and eliminate the looseness of the hoop hole due to the gap. The design of the hoop 21 is relatively free. The projection along the telescopic column direction can be circular, elliptical, polygonal, approximately polygonal, multi-pointed star or any petal combination shape. The two side surfaces 12 can also be provided with some decorative textures and / or external decorative assembly process convex and concave hole columns, and the mounting changes the appearance shape and surface quality, making the telescopic ladder more beautiful.

[0046] The utility model has a wide scope of application and can be applied to all scenes with video surveillance. It is suitable for early warning of dynamic scenes as well as static scenes, and is free from the constraints of conventional cross-border barriers. It is simple to operate and flexible in early warning changes. The early warning object, early warning level and early warning measures can be easily changed without the need for professional technical foundation and specialized vocational training. It has a high degree of automation and directly addresses the root causes of problems. When risks are incipient and sudden risks occur, the alarm is timely and accurate. Users can obtain significant social and economic benefits without additional investment, and it has significant technological advancement significance in the monitoring of geological disasters, building structures, transportation hubs, machine tools and equipment, process flows, assembly lines, security systems, and the like.

[0047] 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 in the present invention, which should be included in the protection scope of the present invention.

Claims

1. A polymer pedal structure for a telescopic ladder that is resistant to deformation and easy to detect, 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 body is formed into an integral body from a polymer material by molding technology, and the functional modules are inseparable. The pedal (1) is provided with a treading surface (11), two side surfaces (12) and a process bottom surface (13), and the treading surface (11) and / or the process bottom surface (13) are provided with an anti-deformation structure (4) and a detection process reference datum (5).

2. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 1, characterized in that: The anti-deformation structure (4) is one or more of an anti-deformation shape design (41), an anti-deformation rib combination (42), an anti-deformation position distribution (43) and an anti-deformation insert (44).

3. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 2, characterized in that: The anti-deformation shape design (41) includes the convex and concave rib groove reinforcement design of the tread surface (11) and the arc or arch curve design of the cross section, as well as the shape and position distribution design of the reinforcement ribs of the process bottom surface (13).

4. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 2, characterized in that: The anti-deformation rib combination (42) includes a longitudinal and transverse vertical rib combination (421), a mesh angled cross rib combination (422), and a position distribution combination of a rib combination (423).

5. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 2, characterized in that: The anti-deformation position distribution (43) includes the edge and N equally divided points of the treading surface (11), the edge and N equally divided points of the process bottom surface (13), and the joint between the pedal (1) and the sleeve (2).

6. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 2, characterized in that: The anti-deformation insert (44) is a metal insert, a polymer insert, a fiber mesh or a bamboo or wood insert, and is provided with convex and concave (441) or corner (442) reinforcement technical features, and is unidirectional or bidirectionally reinforced.

7. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 1, characterized in that: The detection process reference datum (5) comprises a cumulative deformation detection reference datum (51) and a standard load real-time deformation detection reference datum (52), which are used to detect or warn the real-time safety status of the pedal body.

8. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 7, characterized in that: The cumulative deformation detection reference datum (51) is used to display or warn the cumulative deformation between the factory state of the pedal body and the real-time state of the pedal body. When the cumulative deformation of a pedal body is large enough and is in the warning area, the pedal body should be immediately repaired or replaced.

9. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 7, characterized in that: The standard load real-time deformation detection reference datum (52) is used to detect the deformation value of the current pedal body between the reference points before and after the standard load is placed. When the deformation value is within the allowable range, it can be used safely. When the deformation value is within the warning range, it should be immediately repaired or replaced. When the deformation value exceeds the warning range, the pedal body should be immediately replaced, or the telescopic ladder should be immediately deactivated.

10. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 1, characterized in that: It also includes a risk alarm device, which is a deformation warning mark or a deformation alarm sensor, and is pasted or pre-buried on the appearance surface of the tread surface (11) or the two side surfaces (12).

11. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 1, characterized in that: The tread surface (11) is provided with anti-skid convexo-concave surfaces (111) and wear-resistant ribs (112). The anti-skid convexo-concave surfaces (111) include transverse and longitudinal convexo-concave surfaces and are used to prevent people from sliding laterally or longitudinally when there is a lateral force on the pedal, thereby causing an unstable center of gravity and falling. The wear-resistant ribs (112) are divided into primary wear-resistant ribs and secondary wear-resistant ribs. The primary wear-resistant ribs are ribs protruding from a 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 pedals begin to contact the secondary wear-resistant ribs, thereby preventing skidding and wear.

12. The anti-deformation and easy-to-detect special polymer pedal structure for telescopic ladder according to claim 1, characterized in that: The sleeve (2) is provided with a hoop ring (21) and a hoop ring hole (22); the hoop ring (21) wraps around and covers the telescopic column (3); the hoop ring hole (22) and the telescopic column (3) are loosely matched, and the hole diameter is greater than 0.1 mm than the outer diameter of the matched telescopic column; the hoop ring hole is evenly provided with more than three deformable interference fit ribs, which are convenient for clamping the telescopic column (3) and eliminating the looseness of the hoop ring hole due to the gap; the projection of the hoop ring (21) along the direction of the telescopic column is circular, elliptical, polygonal, approximately polygonal, polygonal star or any petal combination shape.

13. The anti-deformation and easy-to-detect special polymer pedal structure for 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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