Three-legged ladder

Abstract

The utility model provides a three-legged ladder and belongs to the technical field of living appliances. A three-legged ladder comprises two front supporting rods which are oppositely arranged, a plurality of foot bars are arranged between the two front supporting rods at intervals in the length direction, the upper ends of the two front supporting rods are connected with a top layer platform, and the three-legged ladder is characterized in that a connecting rod is detachably connected to the top layer platform, a rotating shaft is arranged on the connecting rod in a sleeved mode, and the rotating shaft is connected with the two front supporting rods in a sleeved mode. A rear supporting rod is fixedly connected to the rotating shaft, and a limiting rope is detachably connected between the rear supporting rod and the foot lever. During transportation, the connecting rods are detached to enable the rear supporting rods to be independent, at the moment, the three-legged ladder is detached into two parts, the front supporting rods and the top-layer platform are one part, the rear supporting rods are one part, and due to the fact that the two supporting rods and the top-layer platform are approximately 7-shaped, a plurality of three-legged ladders can be stacked during loading. The area between the two supporting rods and the top-layer platform is reasonably utilized, and the space utilization rate is increased.

Description

Technical Field

[0001] This utility model belongs to the field of household appliances technology, and in particular relates to a three-legged ladder. Background Technology

[0002] A three-legged ladder is a common household ladder, also known as a three-step ladder or folding ladder, named for its three supporting legs. For example, Chinese patent application number 201520300764.2 discloses a multi-purpose three-legged ladder, comprising a ladder body consisting of a main rod and support rods. The main rod includes two side support members and several steps suitable for climbing, horizontally connected in the middle of the support members. At least one step has protrusions extending outwards at both ends of its inner side, forming openings between the protrusions to accommodate the support rods. In this design, the ladder's structure is relatively complex and cannot be disassembled. Therefore, it occupies a large amount of space during loading and transportation, making it inconvenient to transport. Furthermore, the low space utilization rate prevents the transport of more three-legged ladders at once, increasing transportation costs. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a three-legged ladder. The technical problem this invention aims to solve is: how to improve the space utilization rate of a three-legged ladder during transportation.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a three-legged ladder, comprising two opposing front support rods, with a plurality of treads spaced apart along the length between the two front support rods, and a top platform connected to the upper ends of the two front support rods, characterized in that a connecting rod is detachably connected to the top platform, a rotating shaft is sleeved on the connecting rod, a rear support rod is fixedly connected to the rotating shaft, and a limit cable is detachably connected between the rear support rod and the treads.

[0005] During transportation, the connecting rods are disassembled so that the rear support rod can be separated. At this time, the tripod is disassembled into two parts: the front support rod and the top platform are one part, and the rear support rod is another part. Since the two support rods and the top platform are approximately in the shape of a "7", multiple tripods can be stacked during loading, making reasonable use of the area between the two support rods and the top platform and improving space utilization.

[0006] In the aforementioned three-legged ladder, the rotating shaft is inserted into the rear side of the top platform and a connecting rod is fixed to the top platform with bolts. A U-shaped reinforcing connector is provided between the rotating shaft and the rear support rod. The two ends of the reinforcing connector are fixed to the two ends of the rotating shaft, and the middle part of the reinforcing connector is fixed to the rear side of the rear support rod. The connecting rod is fixed and disassembled using bolts. The structure is simple, practical, and low-cost. Because the rear support rod is rod-shaped, the connection strength between the rear support rod and the rotating shaft is relatively weak. The reinforcing connector increases the connection strength between the rear support rod and the rotating shaft, improving the safety of the three-legged ladder.

[0007] In the aforementioned three-legged ladder, a telescopic rod is internally installed within the rear support rod and secured by a locking pin. The telescopic rod allows for adaptive adjustment of the three-legged ladder, making it suitable for a wide range of applications.

[0008] In the aforementioned three-legged ladder, the front support rod, treads, top platform, rear support rod, and telescopic rod are all made of galvanized iron. Galvanized iron is a very strong and durable material, capable of withstanding large loads and various usage conditions. It has high resistance to impacts, compression, and wear in the usage environment. Therefore, using galvanized iron for the front support rod, treads, top platform, rear support rod, and telescopic rod improves the strength and durability of the three-legged ladder. Furthermore, galvanized iron is relatively economical and has a lower manufacturing cost.

[0009] In the aforementioned tripod, the two front support rods are arc-shaped, and the upper end face of the treads and the outer surfaces of the two front support rods have a plurality of reinforcing ribs arranged along the width direction and extending in a concave-convex shape along the length direction. The arc-shaped front support rods can provide a wider support area, making the ladder frame more stable. The concave-convex reinforcing ribs provide more friction, reducing the risk of slipping when feet step on the treads and increasing the ladder's anti-slip performance. On the other hand, the concave-convex surface can enhance the structural strength, making the tripod more robust and durable, ensuring the load-bearing capacity and service life of the tripod.

[0010] In the aforementioned tripod, a limiting hook is provided on the rear support rod. One end of the limiting cable is fixed to the step rod, and the other end is hung on the limiting hook. The limiting cable is made of cable, chain, or wire rope. When the tripod is opened, the limiting cable, hanging on the limiting hook, restrains the rear support rod to stabilize the tripod. The structure is simple, the inclination of the tripod can be adjusted, and the operation is easy.

[0011] In the aforementioned three-legged ladder, the bottom step is equipped with a storage hook that can hook onto the telescopic rod. The storage hook allows the telescopic rod to be hooked during the storage and transport of the three-legged ladder, facilitating storage and preventing the rear support rod from accidentally opening.

[0012] In the aforementioned tripod, a first reinforcing link is obliquely arranged between the front support rod and the top platform. One end of the first reinforcing link is hinged to the upper part of the front support rod, and the other end is detachably hinged to the middle of the top platform. A second reinforcing link is fixed between the lower end of the front support rod and the bottom step of the steps. The inclusion of both the first and second reinforcing links increases the connection strength of the tripod and improves its safety. The first reinforcing link can be detached from the top platform, providing more loading space and further improving space utilization.

[0013] In the aforementioned tripod, foot braces are installed at the bottom ends of both the rear support rod and the telescopic rod. The foot braces increase the stability of the tripod, thereby improving safety.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. During transportation, the connecting rod is disassembled so that the rear support rod can be separated. At this time, the tripod is disassembled into two parts. Multiple tripods can be stacked during loading to make reasonable use of the area between the two support rods and the top platform and improve space utilization.

[0016] 2. The front support rod, step rod, top platform, rear support rod, and telescopic rod are all made of galvanized iron, which improves the strength and durability of the tripod. At the same time, galvanized iron is relatively economical and has a lower cost.

[0017] 3. The reinforcing ribs give the treads and front support rods a textured surface, which enhances the structural strength, making the tripod more robust and durable, and ensuring its load-bearing capacity and service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the overall structure of this utility model. Figure 3 ;

[0021] In the diagram, 1. Front support rod; 2. Step rod; 3. Top platform; 4. Connecting rod; 51. Rotating shaft; 52. Rear support rod; 6. Limiting cable; 53. Reinforcing connector; 54. Telescopic rod; 55. Locking pin; 7. Reinforcing rib; 8. Limiting hook; 9. Storage hook; 101. First reinforcing link; 102. Second reinforcing link; 103. Foot support. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to the following embodiments.

[0023] Combination Figure 1-3 As shown, a three-legged ladder includes two oppositely arranged, arc-shaped front support rods 1. Several treads 2 are arranged along the length between the two front support rods 1. A top platform 3 is connected to the upper ends of the two front support rods 1. A connecting rod 4 is detachably connected to the top platform 3. A rotating shaft 51 is sleeved on the connecting rod 4. A rear support rod 52 is fixedly connected to the rotating shaft 51. The rotating shaft 51 is inserted into the rear side of the top platform 3, and the connecting rod 4 is fixed to the top platform 3 by bolts. Since the rear support rod 52 is rod-shaped, the connection strength between the rear support rod 52 and the rotating shaft 51 is relatively weak. Therefore, a U-shaped reinforcing connector 53 is provided between the rotating shaft 51 and the rear support rod 52. The two ends of the reinforcing connector 53 are respectively fixed to the two ends of the rotating shaft 51, and the middle part of the reinforcing connector 53 is fixed to the rear side of the rear support rod 52, increasing the connection strength between the rear support rod 52 and the rotating shaft 51 and improving the safety of the three-legged ladder.

[0024] A limiting cable 6 is detachably connected between the rear support rod 52 and the step rod 2. A limiting hook 8 is provided on the rear support rod 52. One end of the limiting cable 6 is fixed to the step rod 2, and the other end is hung on the limiting hook 8. The limiting cable 6 is made of cable, chain, or wire rope. A telescopic rod 54 is telescopically installed inside the rear support rod 52 and fixed by a locking pin 55. The telescopic rod 54 allows for adaptive adjustment of the tripod, making it widely applicable.

[0025] Galvanized iron is a very strong and durable material capable of withstanding heavy loads and various operating conditions. It has high resistance to impacts, compression, and abrasion in the environment. Therefore, using galvanized iron for the front support rod 1, step rod 2, top platform 3, rear support rod 52, and telescopic rod 54 can improve the strength and durability of the tripod. At the same time, galvanized iron is relatively economical and has a lower cost.

[0026] The upper surface of the step bar 2 and the outer surfaces of the two front support bars 1 are each provided with several reinforcing ribs 7 arranged along the width direction and extending in the length direction in a concave-convex shape. The concave-convex reinforcing ribs 7 provide more friction, reducing the risk of slipping when stepping on the step bar 2 and increasing the anti-slip performance of the ladder. On the other hand, the concave-convex surface enhances the strength of the structure, making the tripod ladder more robust and durable, ensuring the load-bearing capacity and service life of the tripod ladder.

[0027] A first reinforcing link 101 is inclinedly arranged between the front support rod 1 and the top platform 3. One end of the first reinforcing link 101 is hinged to the upper part of the front support rod 1, and the other end is detachably hinged to the middle of the top platform 3. A second reinforcing link 102 is fixed between the lower end of the front support rod 1 and the bottom step 2 of the step rod 2, which increases the connection strength of the tripod and improves the safety of the tripod.

[0028] The bottom step 2 of the step bar 2 is equipped with a storage hook 9 that can hook the telescopic rod 54. The storage hook 9 is designed to hook the telescopic rod 54 when storing and moving the tripod ladder, making it easy to store and preventing the rear support rod 52 from being accidentally extended.

[0029] Both the bottom end of the rear support rod 52 and the bottom end of the telescopic rod 54 are equipped with foot braces 103. The foot braces 103 increase the stability of the tripod, thereby improving safety.

[0030] During transportation, the connecting rod 4 is disassembled so that the rear support rod 52 can be separated. At this time, the tripod is disassembled into two parts: the front support rod 1 and the top platform 3 are one part, and the rear support rod 52 is another part. Since the two support rods and the top platform 3 are approximately in the shape of a "7", multiple tripods can be stacked during loading, making reasonable use of the area between the two support rods and the top platform 3 and improving space utilization. The first reinforcing connecting rod 101 can be disassembled from the top platform 3, providing more loading space during loading and further improving space utilization.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A three-legged ladder, comprising two opposing front support rods (1), wherein a plurality of treads (2) are spaced apart along the length of the two front support rods (1), and a top platform (3) is connected to the upper ends of the two front support rods (1), characterized in that, A connecting rod (4) is detachably connected to the top platform (3). A rotating shaft (51) is sleeved on the connecting rod (4). A rear support rod (52) is fixedly connected to the rotating shaft (51). A limit cable (6) is detachably connected between the rear support rod (52) and the step rod (2).

2. A tripod ladder according to claim 1, characterized in that, The rotating shaft (51) is inserted into the rear side of the top platform (3) and the connecting rod (4) is fixed to the top platform (3) by bolts. A U-shaped reinforcing connector (53) is provided between the rotating shaft (51) and the rear support rod (52). The two ends of the reinforcing connector (53) are respectively fixed to the two ends of the rotating shaft (51), and the middle part of the reinforcing connector (53) is fixed to the rear side of the rear support rod (52).

3. A three-legged ladder according to claim 2, characterized in that, The rear support rod (52) is internally provided with a telescopic rod (54) and is fixed by a locking pin (55).

4. A tripod ladder according to claim 3, characterized in that, The front support rod (1), step rod (2), top platform (3), rear support rod (52), and telescopic rod (54) are all made of galvanized iron.

5. A three-legged ladder according to any one of claims 1 to 4, characterized in that, The two front support rods (1) are arc-shaped, and the upper end face of the step rod (2) and the outer side face of the two front support rods (1) are provided with a number of reinforcing ribs (7) that extend in the length direction and are concave and convex along the width direction.

6. A three-legged ladder according to claim 5, characterized in that, The rear support rod (52) is provided with a limiting hook (8). One end of the limiting cable (6) is fixed on the step rod (2), and the other end is hung on the limiting hook (8). The limiting cable (6) is made of cable, chain or wire rope.

7. A three-legged ladder according to claim 6, characterized in that, The bottom pedal (2) of the pedal (2) is provided with a storage hook (9) that can hook the telescopic rod (54).

8. A three-legged ladder according to claim 5, characterized in that, A first reinforcing link (101) is inclinedly arranged between the front support rod (1) and the top platform (3). One end of the first reinforcing link (101) is hinged to the upper part of the front support rod (1), and the other end is detachably hinged to the middle of the top platform (3). A second reinforcing link (102) is fixed between the lower end of the front support rod (1) and the bottom step rod (2) of the step rod (2).

9. A three-legged ladder according to claim 4, characterized in that, Both the bottom end of the rear support rod (52) and the bottom end of the telescopic rod (54) are equipped with foot braces (103).

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