Safety extension ladder

Abstract

The utility model discloses a safe retractable ladder, including two groups of ladder pole and pedal assembly, two groups of ladder pole are respectively by the telescopic sleeve joint of multisection ladder section, and the multisection ladder section in two groups of ladder pole is set up one to one between each other, and the limiting portion of each other of each group of ladder pole is set up between two sections of ladder section, and the limiting portion is limited cooperation, pedal assembly is equipped with the connecting pipe and pedal main part, and the connecting pipe fixed connection is in the two sections of ladder section between being set up to each other, and pedal main part is equipped with the base and is by the insulating soft material and is fixed setting on the side of base on the treading part, and the treading part is equipped with the antiskid line on the side of base back to treading part, and the base is equipped with the clamping groove on the side of base back to treading part, and the base is wrapped on the connecting pipe closely and fixedly through the clamping groove. The structure of the safe retractable ladder is novel, simple, reasonable, has good use safety and treading comfort, satisfies the market demand.

Description

Technical Field

[0001] This utility model relates to the field of telescopic ladder technology, and in particular to a safe telescopic ladder. Background Technology

[0002] As is well known, telescopic ladders, as a common climbing tool, typically consist of a main body and a footboard. The main body is the supporting frame of the ladder, bearing the weight of the user and the stress on the entire ladder during use. Generally, the main body includes two sets of ladder bars, each set consisting of multiple telescopically connected ladder sections, with the sections in each set arranged one-to-one with each other. The footboard is the part for the user to step on; typically, the footboard is flat and fixedly connected between the two opposing ladder sections.

[0003] While the aforementioned telescopic ladder structure offers good support and load-bearing capacity, it still has the following shortcomings during use: ① When the ladder bars extend, the relative stability between the different sections is somewhat lacking, resulting in generally poor safety during use. ② The footboards provide a poor user experience in terms of comfort and security.

[0004] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0005] To overcome the above-mentioned defects, this utility model provides a safe telescopic ladder with a novel, simple, and reasonable structure, good safety and comfort when stepped on, which well meets market demand.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a safety telescopic ladder, comprising:

[0007] The ladder rods are configured in two sets; each set of ladder rods is composed of multiple ladder segments that are telescopically connected, and the multiple ladder segments in the two sets of ladder rods are arranged one-to-one with each other; and each set of ladder rods has a limiting part that limits and cooperates with each pair of ladder segments that are connected to each other.

[0008] The pedal assembly includes a connecting pipe and a pedal body; the connecting pipe is fixedly connected between two opposing ladder sections; the pedal body has a base and a stepping part made of insulating soft material and fixedly mounted on one side of the base; the stepping part has anti-slip texture on the side facing away from the base; the base has a slot on the side facing away from the stepping part; and the base is tightly and fixedly wrapped around the connecting pipe through the slot.

[0009] As a further improvement of this utility model, in each set of ladder rods, each section of the ladder is integrally provided with a limiting part protruding from its inner wall and / or outer wall, and the limiting part on each pair of interlocking sections of the ladder can stop and cooperate.

[0010] As a further improvement of this utility model, based on the usage state of the safety telescopic ladder, in each set of ladder bars, the limiting part is integrally protruded on the top outer wall of the innermost ladder section, the limiting part is integrally protruded on the bottom inner wall of the outermost ladder section, and the limiting part is integrally protruded on the top outer wall and bottom inner wall of the remaining ladder sections respectively; in addition, the limiting part is circular.

[0011] As a further improvement of this utility model, the limiting parts on each section of the ladder are arranged in pairs and spaced apart along the axial direction of the ladder section, and a bushing is provided between the pairs of limiting parts.

[0012] As a further improvement of this utility model, the base is made of thermoplastic resin material, the stepping part is made of thermoplastic elastomer material, and the base and the stepping part are integrally injection molded.

[0013] As a further improvement of this utility model, the connecting pipe is made of stainless steel, and the base is fixedly wrapped around the connecting pipe by a hot pressing process.

[0014] As a further improvement of this utility model, the base is provided with a rectangular plate-shaped base body, the base body having a front and a back side facing each other, and the slot extending along its length and matching the shape of the connecting pipe is integrally provided on the back side of the base body.

[0015] As a further improvement of this utility model, the connecting pipe is a flat pipe, and correspondingly, the cross-section of the slot is C-shaped.

[0016] As a further improvement of this utility model, the stepping part is a rectangular plate and is fixedly disposed on the front side of the base body.

[0017] As a further improvement of this utility model, in each of the two sets of ladder bars, a tread assembly is fixedly provided between each pair of opposite ladder sections;

[0018] In addition, in each set of ladder bars, an anti-slip seat is installed at the bottom of the innermost ladder section, and an installation component is provided on the upper part of the outermost ladder section, the installation component being used to fix it to a fixed object.

[0019] The beneficial effects of this utility model are: ① Compared with the prior art, this utility model improves the structure of the ladder rods and footboard assemblies of the telescopic ladder, enhancing the stability of the ladder rods in the extended state, and ensuring that the footboard assembly has good supporting rigidity while also providing good stepping comfort, anti-slip safety, and insulation safety. This significantly improves the safety and comfort of the telescopic ladder during use, effectively meeting market demands. ② The telescopic ladder of this utility model has a novel, simple, and reasonable structure, is easy to process and manufacture, and has low manufacturing costs, facilitating production implementation and promotion. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the safety telescopic ladder described in this utility model from a first-person perspective;

[0021] Figure 2 This is a structural schematic diagram of the safety telescopic ladder described in this utility model from a second perspective;

[0022] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the safety telescopic ladder shown in the image.

[0023] Figure 4 for Figure 3 An enlarged structural diagram of part A shown in the image;

[0024] Figure 5 for Figure 3 An enlarged structural diagram of section B shown in the figure;

[0025] Figure 6 for Figure 1 A schematic diagram of the pedal assembly shown;

[0026] Figure 7 for Figure 6 A schematic diagram of the structure of the pedal body shown;

[0027] Figure 8 for Figure 7 An enlarged structural diagram of section C shown in the figure;

[0028] Figure 9 for Figure 6 The diagram shows the structure of the connecting pipe.

[0029] Referring to the accompanying drawings, the following explanations are provided:

[0030] 1. Ladder bar; 10. Ladder section; 11. Limiting part; 12. Bushing; 2. Pedal assembly; 20. Connecting pipe; 21. Pedal body; 210. Base; 2100. Slot; 2101. Base body; 211. Step part; 2110. Anti-slip texture; 2111. Groove; 2112. Raised strip; 3. Anti-slip seat; 4. Mounting parts. Detailed Implementation

[0031] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] Example

[0033] As is well known, telescopic ladders, as a common climbing tool, typically consist of a main body and a footboard. The main body is the supporting frame of the telescopic ladder, bearing the weight of the user and the force exerted on the entire ladder during use. Generally, the main body includes two sets of ladder bars 1, each set of ladder bars 1 consisting of multiple telescopically connected ladder sections 10 (understandably, each ladder section 10 is a hollow tubular structure), and the multiple ladder sections 10 in the two sets of ladder bars 1 are arranged one-to-one with each other. The footboard is the part for the user to step on, and there are generally multiple footboards, that is, one footboard is fixedly connected between every two opposing ladder sections 10.

[0034] To improve the safety and comfort of the telescopic ladder during use, this embodiment focuses on structural improvements to the ladder rod 1 and the footboard, specifically in the following aspects:

[0035] Please see the appendix Figure 1 To be continued Figure 5 As shown, in this embodiment, a limiting part 11 is provided between each pair of interlocking ladder sections 10 in each group of ladder rods 1 to enhance the stability of the ladder rods 1 in the extended state, thereby improving the safety of the telescopic ladder during use.

[0036] Please refer to the appendix next. Figure 1 and attached Figure 2 and appendix Figure 6 To be continued Figure 9As shown, this embodiment provides a novel pedal assembly 2 (i.e., pedal part). The pedal assembly 2 has a connecting pipe 20 and a pedal body 21. The connecting pipe 20 is fixedly connected between two opposing ladder sections 10 (the connecting pipe 20 and the ladder section 10 can be fixedly connected together by welding or fasteners). The pedal body 21 has a base 210 and a foot pedal part 211 made of insulating soft material and fixedly disposed on one side of the base 210. The foot pedal part 211 has anti-slip texture 2110 on the side away from the base 210. The base 210 has a slot 2100 on the side away from the foot pedal part 211, and the base 210 is tightly and fixedly wrapped around the connecting pipe 20 through the slot 2100. Understandably, in the pedal assembly structure provided in this embodiment, the foot pedal portion 211 in the pedal body 21 has good softness, insulation and anti-slip properties, thereby providing users with good foot feel (stepping comfort) and safety (anti-slip and insulation properties).

[0037] In summary, as can be seen from the above, this embodiment effectively improves the safety and comfort of the telescopic ladder during use by structurally improving and innovating the ladder rod 1 and the pedal assembly, providing users with a very good user experience and well meeting market demands.

[0038] The specific structure of the safety telescopic ladder described in this application will be described in detail below.

[0039] Please continue to refer to the appendix. Figure 3 To be continued Figure 5 As shown in the figure, the specific implementation of the limiting part 11 that is provided between each pair of interlocking ladder segments 10 in each group of ladder rods 1 is as follows: each ladder segment 10 in each group of ladder rods 1 is integrally provided with a limiting part 11 that protrudes from its inner wall and / or outer wall, and the limiting part 11 on each pair of interlocking ladder segments 10 can stop and cooperate.

[0040] Furthermore, based on the extended / useful state of the safety telescopic ladder, in this embodiment, a circularly shaped limiting part 11 is integrally protruded on the top outer wall of the innermost ladder segment 10 in each set of ladder bars 1; a similarly shaped circularly shaped limiting part 11 is integrally protruded on the bottom inner wall of the outermost ladder segment 10; and a similarly shaped circularly shaped limiting part 11 is integrally protruded on the top outer wall and bottom inner wall of the remaining ladder segments 10. It is understood that when the safety telescopic ladder is in the extended / useful state, the limiting part 11 on the bottom inner wall of the outermost ladder segment 10 can stop and limit the limiting part 11 on the top outer wall of the innermost ladder segment 10, thereby ensuring the stability and safety of the telescopic ladder in the extended / useful state. Furthermore, with the attached... Figure 1 Taking the ladder structure shown as an example, each set of ladder bars 1 is composed of four ladder segments 10 that are telescopically connected. The four ladder segments 10 are defined from the outside to the inside as the first ladder segment, the second ladder segment, the third ladder segment, and the fourth ladder segment. Among them, the bottom inner wall of the first ladder segment is integrally provided with a ring-shaped limiting part 11 (see appendix). Figure 5 As shown in the attached diagram, the second stair section has an integrally protruding, annular limiting portion 11 on both the top outer wall and the bottom inner wall (see attached diagram). Figure 4 and attached Figure 5 As shown in the attached diagram, the top outer wall and bottom inner wall of the third stair section are also integrally provided with the ring-shaped limiting part 11 (see attached diagram). Figure 4 and attached Figure 5 As shown in the figure, the fourth step has an integrally protruding, ring-shaped limiting part 11 on its top outer wall (see attached figure). Figure 4 As shown), when the safety telescopic ladder is in the extended / use state, the limiting part 11 on the bottom inner wall of the first ladder section stops and limits the limiting part 11 on the top outer wall of the second ladder section, the limiting part 11 on the bottom inner wall of the second ladder section stops and limits the limiting part 11 on the top outer wall of the third ladder section, and the limiting part 11 on the bottom inner wall of the third ladder section stops and limits the limiting part 11 on the top outer wall of the fourth ladder section.

[0041] Understandably, to further improve the stability and safety of the telescopic ladder in its extended / use state, the telescopic ladder described in this embodiment can also be equipped with some mechanical locking mechanisms on the ladder rod 1 in actual application, such as "pin and positioning hole cooperation" or "buckle and slot cooperation" commonly used in the field of telescopic ladders; to cooperate with the limiting part 11 provided in this embodiment to perform double limiting / positioning of the ladder rod 1 in the extended state.

[0042] Furthermore, in this embodiment, the limiting portions 11 on each section of the ladder 10 are arranged in pairs and spaced apart along the axial direction of the ladder section 10. A bushing 12 is also provided between the pairs of limiting portions 11. It is understood that the pairs of limiting portions 11 can cooperate to accommodate and restrain the bushing 12. By providing the bushing 12, on the one hand, the ladder section 10 is protected from wear during telescopic movement; on the other hand, it provides good support for the ladder rod 1 in the extended state, thereby ensuring the straightness of the ladder rod 1 in the extended state.

[0043] Please continue to refer to the appendix. Figure 6 To be continued Figure 9 As shown, in this embodiment, the preferred materials and connection molding methods for the connecting pipe 20 and the pedal body 21 are as follows: the base 210 is made of thermoplastic resin material (such as PP material), and the pedal part 211 is made of thermoplastic elastomer material (TPE). The base 210 and the pedal part 211 are integrally injection molded using an injection molding process. The connecting pipe 20 is made of stainless steel, which has high strength and strong load-bearing capacity, ensuring good overall support rigidity of the pedal assembly 2. Furthermore, the base 210 is fixedly wrapped around the connecting pipe 20 using a hot-pressing process. Specifically, in actual operation, the pedal body 21 is first heated until the base 210 softens, and then the pedal body 21 is pressed and fixed onto the connecting pipe 20. Of course, in practical applications, the base 210 can also be fixedly wrapped around the connecting pipe 20 using an adhesive bonding method or an extrusion coating process. This application does not impose any restrictions on this; the specific method depends on the processing requirements.

[0044] Furthermore, to enhance the bonding strength between the base 210 and the connecting tube 20, this embodiment makes the following improvements: ① The outer surface of the connecting tube 20 is roughened to a micro-nano rough surface, thereby enhancing the interfacial bonding force between the outer surface of the connecting tube 20 and the inner surface of the slot 2100; ② An EVA hot melt adhesive is also provided between the outer surface of the connecting tube 20 and the slot 2100. The hot melt adhesive fills the micropores of the outer surface of the connecting tube 20 and the slot 2100 through melt flow to form a mechanical interlock. At the same time, the polar groups of the hot melt adhesive can generate intermolecular forces with the PP material and the stainless steel material, thereby significantly improving the bonding strength between the base 210 and the connecting tube 20.

[0045] In addition, in this embodiment, the preferred specific implementation structure of the connecting pipe 20 and the pedal body 21 is as follows: Please refer to the appendix. Figure 9As shown, the connecting pipe 20 is a flat pipe to facilitate its engagement with the slot 2100.

[0046] Please continue to refer to the appendix. Figure 7 and attached Figure 8 As shown, the base 210 is provided with a rectangular plate-shaped base body 2101. The base body 2101 has a front and a back side facing each other. The slot 2100 extending along its length and matching the shape of the connecting tube 20 is integrally provided on the back side of the base body 2101. It can be understood that, based on the flat tube structure of the connecting tube 20, the cross section of the slot 2100 can preferably be a C-shaped surface.

[0047] Correspondingly, the stepping part 211 is rectangular plate-shaped and fixedly disposed on the front side of the base body 2101, and the anti-slip texture 2110 is composed of grooves 2111 and convex strips 2112 that extend along the length direction of the stepping part 211 and are alternately arranged in sequence. Of course, this application does not impose any restrictions on the shape of the anti-slip texture 2110, and other shapes may be used in actual applications.

[0048] In addition, please continue to refer to the appendix. Figure 1 To be continued Figure 3 As shown, in each of the two sets of ladder bars 1, a footboard assembly 2 is fixedly installed between each pair of opposite ladder sections 10 to facilitate climbing by the user.

[0049] In each set of ladder rods 1, an anti-slip seat 3 is installed at the bottom end of the innermost ladder section 10 to improve the anti-slip performance of the ladder rod 1 and enhance the safety of the telescopic ladder during use; and an installation member 4 is provided on the upper part of the outermost ladder section 10, which is used to fix it to a fixed object (such as a building).

[0050] In summary, the safety telescopic ladder of this utility model has a novel, simple, and reasonable structure, and provides good safety and comfort when stepped on, thus well meeting market demands.

[0051] Finally, it should be noted that the prefixes "first," "second," etc. (such as first ladder segment, second ladder segment, etc.) in the component names in this specification are only for the purpose of clarity of description and are not intended to limit the scope of implementation of this utility model patent.

[0052] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A safety telescopic ladder, characterized in that: include: The ladder rods (1) are configured in two sets; each of the two sets of ladder rods (1) is composed of multiple ladder segments (10) that are telescopically connected, and the multiple ladder segments (10) in the two sets of ladder rods (1) are arranged one-to-one with each other, and each pair of ladder segments (10) in each set of ladder rods (1) is provided with a limiting part (11) that limits and cooperates with each other. The pedal assembly (2) is provided with a connecting pipe (20) and a pedal body (21); the connecting pipe (20) is fixedly connected between two ladder sections (10) arranged opposite to each other; the pedal body (21) is provided with a base (210) and a stepping part (211) made of insulating soft material and fixedly provided on one side of the base (210); the stepping part (211) is provided with anti-slip texture (2110) on the side away from the base (210); the base (210) is provided with a slot (2100) on the side away from the stepping part (211); and the base (210) is tightly and fixedly wrapped around the connecting pipe (20) through the slot (2100).

2. The safety telescopic ladder according to claim 1, characterized in that: In each set of ladder rods (1), each section of ladder (10) is integrally provided with a limiting part (11) protruding from its inner wall and / or outer wall, and the limiting part (11) on each pair of ladder sections (10) that are nested together can stop and cooperate.

3. The safety telescopic ladder according to claim 2, characterized in that: Based on the usage state of the safety telescopic ladder, in each set of ladder rods (1), the limiting part (11) is integrally protruded on the top outer wall of the innermost ladder section (10), the limiting part (11) is integrally protruded on the bottom inner wall of the outermost ladder section (10), and the limiting part (11) is integrally protruded on the top outer wall and bottom inner wall of the remaining ladder sections (10); in addition, the limiting part (11) is circular.

4. The safety telescopic ladder according to claim 2, characterized in that: The limiting parts (11) on each of the ladder segments (10) are arranged in pairs and spaced apart along the axial direction of the ladder segment (10), and a bushing (12) is provided between the pairs of limiting parts (11).

5. The safety telescopic ladder according to claim 1, characterized in that: The base (210) is made of thermoplastic resin material, the stepping part (211) is made of thermoplastic elastomer material, and the base (210) and the stepping part (211) are integrally injection molded.

6. The safety telescopic ladder according to claim 5, characterized in that: The connecting pipe (20) is made of stainless steel, and the base (210) is fixedly wrapped around the connecting pipe (20) by hot pressing process.

7. The safety telescopic ladder according to claim 1, characterized in that: The base (210) is provided with a base body (2101) in the shape of a rectangular plate. The base body (2101) has a front and a back side facing each other. The back side of the base body (2101) is integrally provided with the slot (2100) extending along its length direction and matching the shape of the connecting tube (20).

8. The safety telescopic ladder according to claim 7, characterized in that: The connecting pipe (20) is a flat pipe, and correspondingly, the cross-section of the slot (2100) is C-shaped.

9. The safety telescopic ladder according to claim 7, characterized in that: The stepping part (211) is a rectangular plate and is fixedly installed on the front of the base body (2101).

10. The safety telescopic ladder according to claim 1, characterized in that: In each of the two sets of ladder bars (1), a footboard assembly (2) is fixedly provided between each pair of opposite ladder sections (10). In addition, in each set of ladder bars (1), an anti-slip seat (3) is installed on the bottom end of the innermost ladder section (10), and an installation part (4) is provided on the upper part of the outermost ladder section (10), the installation part (4) being used to fix it to a fixed object.

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