A high-safety telescopic folding ladder

Abstract

The present invention provides a high-safety telescopic folding ladder, comprising an upper frame, a lower frame, and a protective mechanism. The upper frame and the lower frame constitute the main structure of the ladder. The upper frame and the lower frame cooperate with a first fixing frame, a second fixing frame, a third fixing frame, and a fixing clamp to enable folding and lifting, while also ensuring that the ladder remains stable. The protective mechanism is mounted on the upper frame and is primarily used to provide safety protection for workers. The present invention can prevent workers from losing balance and falling during height operations; the foldable and telescopic design makes the ladder more portable and occupies less space; its strong stability improves safety; the installation of a bottom pulley makes the ladder more convenient to move; and the ladder can also be used as a single or double ladder, adapting to various height spaces.

Description

Technical Field

[0001] The invention relates to the technical field of climbing tools, in particular to a high-safety telescopic folding ladder. Background Art

[0002] In the process of production and life, climbing operations are often required. The tools commonly used for climbing operations are single ladders and combined ladders. The existing single ladders or combined ladders are slightly insufficient in safety design. Climbing operations also require frequent relocation, especially for operations at relatively high heights, which require the use of safe and easy-to-move ladders.

[0003] Existing operations at relatively high heights are usually carried out using scaffolding, but the existing scaffolding has many shortcomings, such as poor safety, great safety hazards; taking up a large amount of space; being heavy and difficult to move. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a high-safety telescopic folding ladder, comprising an upper frame (1), a lower frame (2) and a protection mechanism (3), wherein the upper frame (1) comprises two short upper rods, two long upper rods, a first fixing frame (11), a second fixing frame (12), a pedal (13) and a fixing clamp (14), the lower frame (2) comprises four lower rod main rods (21), a support rod (22) and a third fixing frame (23), the protection mechanism (3) comprises a handrail (31), a first guard rod (32), a first safety belt (33), a second guard rod (34), a second safety belt (35), and a second safety belt (36). (35) and platform pedal (36); the short upper rod and the long upper rod are movably connected to the four lower rod main rods (21) through a fixing clamp (14); the top of the short upper rod is rotatably connected to the left end of the first fixing frame (11) through an axle pin, the right end of the first fixing frame (11) is rotatably connected to the long upper rod through an axle pin, and the two ends of the second fixing frame (12) are rotatably connected to the outside of the fixing clamps (14) on the left and right sides through axle pins, and pedals (13) are provided between the two short upper rods, between the two long upper rods and between the lower rod main rods (21), and pedal holes (131) are provided at both ends of the pedals (13). ) The outer side of the part holding the short upper rod and the long upper rod is provided with a through hole, which is the same size as the pedal hole (131) at both ends of the pedal (13), and a square pin (141) is provided in the through hole. The part of the fixing clamp (14) holding the lower rod main rod (21) is welded together with the lower rod main rod (21). The two ends of the third fixing frame (23) are rotatably connected to the lower part of the lower rod main rod (21) near the bottom through an axle pin. The top end of the support rod (22) is rotatably connected to the outer side of the lower rod main rod (21). A sawtooth adjustment rod (225) is provided between the support rod (22) and the lower rod main rod (21). The handrail rod (31) is set at two long At the upper part of the upper rod, the first guard rod (32) is arranged above the two long upper rods, and the end thereof is rotatably connected to the top of the handrail rod (31) through a folding joint. The second guard rod (34) is arranged above the two short upper rods, and the end thereof is rotatably connected to the upper middle position of the handrail rod (31) through a folding joint. The platform pedal (36) is arranged above the second pedal (13) at the top, and the end thereof is rotatably connected to the middle position of the handrail rod (31) through a folding joint. The first safety belt (33) is installed between the two ends of the first guard rod (32), and the second safety belt (35) is installed between the two ends of the second guard rod (34).

[0005] In an optional embodiment, the second fixing frame (12) is a folding structure with a plurality of fixing holes provided at both ends.

[0006] In an optional embodiment, the pedal (13) is a square tube structure.

[0007] In an optional embodiment, a top bead (1411) is provided on the square pin (141), and a spring is installed under the top bead (1411).

[0008] In an optional embodiment, a cross bar is provided between the bottom ends of the two corresponding lower main bars (21) at the front and rear ends, and pulleys are provided at both ends of the bottom of the cross bar.

[0009] In an optional embodiment, the support rod (22) is a sleeve rod structure, including a support upper rod (221) and a support lower rod (222), the top end of the support upper rod (221) is rotatably connected to the outer side of the lower rod main rod (21) through an upper hinge (223), the fixed end of the upper hinge (223) is installed on the side frames on both sides of the lower rod main rod (21), and the movable end is connected to the top end of the support upper rod (221), and the bottom end of the support rod (22) is provided with a pulley.

[0010] In an optional embodiment, the bottom end of the serrated adjustment rod (225) is rotatably connected to the outer side of the lower rod main rod (21) through a lower movable joint (224), the fixed end of the lower movable joint (224) is installed on the two side frames of the lower rod main rod (21), and the movable end is connected to the top of the serrated adjustment rod (225), the serrated adjustment rod (225) is provided with a plurality of tooth-shaped grooves (2251), and the side of the support rod (22) is provided with fastening bolts adapted to the tooth-shaped grooves (2251).

[0011] In an optional embodiment, the third fixing frame (23) is a folding structure with a plurality of fixing holes provided at both ends.

[0012] In an optional embodiment, the first safety belt (33) and the second safety belt (35) are made of high-strength nylon material, one end of the first safety belt (33) is fixed on the first guard bar (32), and the other end is connected to the other side of the first guard bar (32) through a folding buckle, and one end of the second safety belt (35) is fixed on the second guard bar (34), and the other end is connected to the other side of the second guard bar (34) through a folding buckle.

[0013] In an optional embodiment, the platform pedal (36) is a box-shaped structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention can provide safety protection for workers when climbing and working, and prevent the body from losing balance and falling when working at height; the foldable and telescopic design makes the ladder more portable and takes up less space; the strong stability improves safety; the installation of the bottom pulley makes the ladder more convenient to move; the ladder can also be used as a single or double ladder, and can adapt to use in spaces at various heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following describes an embodiment of the high-safety telescopic folding ladder of the present invention with reference to the accompanying drawings.

[0017] Figure 1 A schematic diagram of the overall structure of a high-safety telescopic folding ladder provided by the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of part A;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of part B;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of part C;

[0021] Figure 5 Schematic diagram of the structure of the square pin;

[0022] Figure 6 for Figure 1 Schematic diagram of the structure of part D;

[0023] Figure 7 for Figure 1 Schematic diagram of the structure of part E. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, they are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if the descriptions of "first", "second", etc. are involved in the present invention, they are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The following describes the specific implementation of the present invention in detail with reference to specific embodiments:

[0028] See Figure 1-4 A high-safety telescopic folding ladder provided by an embodiment of the present invention comprises an upper frame (1), a lower frame (2) and a protection mechanism (3), wherein the upper frame (1) comprises two short upper rods, two long upper rods, a first fixing frame (11), a second fixing frame (12), a pedal (13) and a fixing clamp (14), the lower frame (2) comprises four lower rod main rods (21), a support rod (22) and a third fixing frame (23), and the protection mechanism (3) comprises a handrail (31), a first guard rod (32), a first safety belt (33), a second guard rod (34), a second safety belt (35) and a platform pedal (36);

[0029] The upper frame (1) can slide up and down relative to the lower frame (2). Specifically, the short upper rod and the long upper rod are movably connected to the four lower rod main rods (21) through a fixing clamp (14). The top of the short upper rod is rotatably connected to the left end of the first fixing frame (11) through an axle pin. The right end of the first fixing frame (11) is rotatably connected to the long upper rod through an axle pin, which is used to fix the relative position of the short upper rod and the long upper rod. The two ends of the second fixing frame (12) are rotatably connected to the outside of the fixing clamps (14) on the left and right sides through axle pins. The second fixing frame (12) is a folding structure with a plurality of fixing holes at both ends for adjusting the opening and closing width of the ladder. A pedal (13) is provided between the two short upper rods, between the two long upper rods and between the lower rod main rods (21). The pedal (13) is a square tube structure with pedal holes (131) at both ends. 14) The outer side of the part for clamping the short upper rod and the long upper rod is provided with a through hole, which is the same size as the pedal holes (131) at both ends of the pedal (13), and a square pin (141) is provided in the through hole. The part of the fixing clamp (14) that clamps the lower rod main rod (21) is welded together with the lower rod main rod (21). The short upper rod and the long upper rod can slide freely up and down relative to the lower rod main rod (21) inside the fixing clamp (14). The square pin (141) is used to fix the relative upper and lower positions of the upper frame (1) and the lower frame (2). A top bead (1411) is provided on the square pin (141). A spring is installed under the top bead (1411) so that it always elastically extends out of the surface of the square pin (141), ensuring that the square pin (141) will not fall off when inserted into the pedal hole (131). When the relative position of the upper frame (1) and the lower frame (2) needs to be adjusted, the pull ring of the square pin (141) can be held and pulled out;

[0030] The lower frame (2) is the main supporting structure of the ladder, and a cross bar is provided between the bottom ends of the two corresponding lower rod main rods (21) at the front and rear. Pullwheels are provided at the bottom ends of the cross bar. The two ends of the third fixing frame (23) are rotatably connected to the lower part of the lower rod main rod (21) near the bottom through an axle pin. It is a foldable structure, and a plurality of adjustment holes are provided on it for adjusting the distance between the two lower rod main rods (21). The top end of the support rod (22) is rotatably connected to the outside of the lower rod main rod (21). The support rod (22) is a diagonal support of the ladder to prevent the ladder from tilting to the side due to shaking. The support rod (22) is a sleeve rod structure, including a support upper rod (221) and a support lower rod (222). The support angle is adjusted by adjusting the relative length of the two. The support rod is fixed by inserting the axle pin into the pin hole. The top end of the support upper rod (221) is rotatably connected to the outside of the lower rod main rod (21) through an upper joint (223). The upper joint (223) ) The fixed end is installed on the two side frames of the lower rod main rod (21), and the movable end is connected to the top of the supporting upper rod (221). The bottom end of the support rod (22) is provided with a pulley. A sawtooth adjustment rod (225) is provided between the support rod (22) and the lower rod main rod (21). The bottom end of the sawtooth adjustment rod (225) is rotatably connected to the outer side of the lower rod main rod (21) through a lower joint (224). The fixed end of the lower joint (224) is installed on the lower rod main rod (21). On the two side frames, the movable ends are connected to the top of the sawtooth adjustment rod (225), the upper movable joint (223) and the lower movable joint (224) are similar to the universal joint structure, which can be adjusted at multiple angles, the sawtooth adjustment rod (225) is provided with a plurality of tooth-shaped grooves (2251), and the side of the support rod (22) is provided with fastening bolts adapted to the tooth-shaped grooves (2251), and the fastening bolts are clamped into different tooth-shaped grooves (2251) by adjusting the angle of the support rod (22);

[0031] The protection mechanism (3) is installed above the upper frame (1) and is mainly used to protect the workers and prevent them from losing balance and falling when working at height. The handrail (31) is arranged on the upper part of the two long upper rods and is used for the workers to support and assist with both hands when working at height. The first guard bar (32) is arranged above the two long upper rods and has a height that is level with the upper chest of the workers. The end of the guard bar is rotatably connected to the top of the handrail (31) through a folding joint. The second guard bar (34) is arranged above the two short upper rods and is just in the position of the workers' legs. The lower part of the workers' heads is supported by the pedal (13) and the end of the guard bar is rotatably connected to the upper middle part of the handrail (31) through a folding joint. The platform pedal (36) is arranged on the second pedal at the top. (13), the platform pedal (36) is a box-shaped mechanism, the front lower part of which is supported by the pedal (13), and the end is rotatably connected to the middle position of the handrail rod (31) through a folding joint, the first safety belt (33) is installed between the two ends of the first guard bar (32), and the second safety belt (35) is installed between the two ends of the second guard bar (34), the first safety belt (33) and the second safety belt (35) are made of high-strength nylon, one end of the first safety belt (33) is fixed on the first guard bar (32), and the other end is connected to the other side of the first guard bar (32) through a folding buckle, one end of the second safety belt (35) is fixed on the second guard bar (34), and the other end is connected to the other side of the second guard bar (34) through a folding buckle.

[0032] When workers perform high-altitude operations, they move this high-safety telescopic folding ladder to the operating position and then adjust it according to the height of the operating position. First, the ladder is placed horizontally on the ground, the square pin (141) is pulled out, and the relative position of the upper frame (1) and the lower frame (2) is pulled so that the ladder reaches the operating height. The square pin (141) is inserted to lock the upper frame (1) and the lower frame (2). Then, the pin hole position of the second fixing frame (12) is determined according to the opening and closing width. Then, the lower frame (2) is pulled apart, the second fixing frame (12) is fixed, and the third fixing frame (2) is fixed. 3) After fixing, the first guard bar (32), the second guard bar (34) and the platform pedal (36) are placed horizontally, the folding buckles of the first safety belt (33) and the second safety belt (35) are unfastened, and the ladder is erected. The length of the support rod (22), the position of the toothed groove of the serrated adjustment rod (225) and the overall angle are adjusted respectively, the toothed groove and the fastening bolt are tightened, and the brake of the bottom pulley is locked. Then the worker climbs onto the ladder, steps on the platform pedal (36), fastens the first safety belt (33) and the second safety belt (35), and starts working.

[0033] The embodiments of the present invention have so far described the technical solutions of the present invention in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A high-safety telescopic folding ladder, comprising an upper frame (1), a lower frame (2) and a protective mechanism (3), characterized in that: The upper frame (1) comprises two short upper rods, two long upper rods, a first fixing frame (11), a second fixing frame (12), a pedal (13) and a fixing clamp (14); the lower frame (2) comprises four lower rod main rods (21), a support rod (22) and a third fixing frame (23); the protection mechanism (3) comprises a handrail rod (31), a first guard rod (32), a first safety belt (33), a second guard rod (34), a second safety belt (35) and a platform pedal (36); the short upper rod and the long upper rod are both movably connected to the four lower rod main rods (21) through the fixing clamp (14); the top of the short upper rod is rotatably connected to the left end of the first fixing frame (11) through an axle pin; the right end of the first fixing frame (11) is The ends are rotatably connected to the long upper rod through an axle pin, the second fixing frame (12) is a folding structure, and a plurality of fixing holes are provided at both ends. The two ends of the second fixing frame (12) are rotatably connected to the outside of the fixing clamps (14) on the left and right sides through axle pins. A pedal (13) is provided between the two short upper rods, between the two long upper rods and between the lower rod main rods (21). Pedal holes (131) are provided at both ends of the pedals (13). A through hole is provided on the outside of the part of the fixing clamp (14) holding the short upper rod and the long upper rod, which is the same size as the pedal holes (131) at both ends of the pedals (13). A square pin (141) is provided in the through hole. The part of the fixing clamp (14) holding the lower rod main rod (21) is welded to the lower rod main rod (21). Together, the two ends of the third fixing frame (23) are rotatably connected to the lower part of the lower rod main rod (21) near the bottom position through an axle pin, the top end of the support rod (22) is rotatably connected to the outside of the lower rod main rod (21), and a sawtooth adjustment rod (225) is provided between the support rod (22) and the lower rod main rod (21), the bottom end of the sawtooth adjustment rod (225) is rotatably connected to the outside of the lower rod main rod (21) through a lower movable joint (224), the fixed end of the lower movable joint (224) is installed on the two side frames of the lower rod main rod (21), and the movable end is connected to the top end of the sawtooth adjustment rod (225), the sawtooth adjustment rod (225) is provided with a plurality of tooth-shaped grooves (2251), and the side of the support rod (22) is provided with a tooth-shaped groove (2251) adapted fastening bolts, the handrail (31) is arranged on the upper part of the two long upper rods, the first guard rod (32) is arranged above the two long upper rods, and the end is rotatably connected to the top of the handrail (31) through a folding joint, the second guard rod (34) is arranged above the two short upper rods, and the end is rotatably connected to the upper middle part of the handrail (31) through a folding joint, the platform pedal (36) is arranged above the second pedal (13) at the top, and the end is rotatably connected to the middle position of the handrail (31) through a folding joint, the first safety belt (33) is installed between the two ends of the first guard rod (32), and the second safety belt (35) is installed between the two ends of the second guard rod (34).

2. The high-safety telescopic folding ladder according to claim 1, characterized in that: The pedal (13) is a square tube structure.

3. The high-safety telescopic folding ladder according to claim 1, characterized in that: A top bead (1411) is provided on the square pin (141), and a spring is installed under the top bead (1411).

4. The high-safety telescopic folding ladder according to claim 1, characterized in that: A cross bar is provided between the bottom ends of the two corresponding lower rod main rods (21) at the front and rear ends, and pulleys are provided at both ends of the bottom of the cross bar.

5. The high-safety telescopic folding ladder according to claim 1, characterized in that: The support rod (22) is a sleeve rod structure, comprising an upper support rod (221) and a lower support rod (222). The top end of the upper support rod (221) is rotatably connected to the outside of the lower rod main rod (21) through an upper movable joint (223). The fixed end of the upper movable joint (223) is mounted on the side frames on both sides of the lower rod main rod (21), and the movable end is connected to the top end of the upper support rod (221). A pulley is provided at the bottom end of the support rod (22).

6. The high-safety telescopic folding ladder according to claim 1, characterized in that: The third fixing frame (23) is a folding structure, with a plurality of fixing holes provided at both ends.

7. The high-safety telescopic folding ladder according to claim 1, characterized in that: The first safety belt (33) and the second safety belt (35) are made of high-strength nylon. One end of the first safety belt (33) is fixed on the first guard bar (32), and the other end is connected to the other side of the first guard bar (32) through a folding buckle. One end of the second safety belt (35) is fixed on the second guard bar (34), and the other end is connected to the other side of the second guard bar (34) through a folding buckle.

8. The high-safety telescopic folding ladder according to claim 1, characterized in that: The platform pedal (36) is a box-shaped structure.

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