Self-locking antiskid roller for ladder

Abstract

The utility model discloses a self-locking anti-skidding roller for a ladder, which comprises a connecting frame, a rolling groove is arranged on one side of the connecting frame, lifting grooves are arranged on two sides of the rolling groove, a support shaft is arranged in the lifting grooves in a sliding way, a rolling wheel is arranged on the surface of the support shaft in a rotating way, and a telescopic spring is arranged in a telescopic groove in a matching way. Transmission frames are fixedly connected to the two sides of the inner wall of the rolling groove, limiting rings are fixedly connected to the tail ends of the transmission frames, and self-locking rings are fixedly connected to the two sides of the rolling wheel. The self-locking ladder has the advantages that the connecting frame is fixedly installed at the bottom of the ladder, the rolling wheels are supported through the supporting shafts installed in the lifting grooves in a sliding mode, when a user climbs the ladder, the connecting frame bears downward pressure and moves downwards relative to the rolling wheels through the lifting grooves, and therefore the limiting rings and the self-locking rings are in extrusion contact; through the friction force between the bottom surface of the limiting ring and the self-locking ring, the roller can be effectively prevented from continuously rotating, and the stability of the ladder when a user climbs is improved.

Description

Technical Field

[0001] This utility model relates to the field of roller technology, specifically to a self-locking anti-slip roller for ladders. Background Technology

[0002] Ladders are a common climbing tool used in daily life and work, widely applied in construction, maintenance, cleaning, and many other fields. To facilitate movement and storage, existing ladder designs typically include casters on one side of the bottom. This design allows the ladder to be easily pushed to the desired location even when tilted, greatly improving ease of use.

[0003] However, in actual use, when one end of the ladder is against a wall or other support, it is prone to slipping at the bottom if subjected to external force or if the user experiences uneven force during climbing. This not only directly affects the smooth progress of the work, but more importantly, it poses a serious threat to the user's safety.

[0004] Furthermore, existing ladder roller designs fail to provide effective support when the ladder slips. When the bottom of the ladder slips, one roller will contact the ground and rotate, failing to provide the necessary friction to prevent further slippage. In this situation, the rollers not only fail to support and stabilize the ladder but may also exacerbate its instability and increase the risk of accidents.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a self-locking anti-slip roller for ladders to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A self-locking anti-slip roller for ladders includes a connecting frame, which is fixedly installed on one side of the bottom of the ladder body. A rolling groove is opened on one side of the connecting frame, and lifting grooves are opened on both sides of the rolling groove. A support shaft is slidably installed inside the lifting groove, and a roller is rotatably installed on the surface of the support shaft. A contraction groove is opened on the surface of both the lifting groove and the support shaft, and a telescopic spring is installed inside the contraction groove. A transmission frame is fixedly connected to both sides of the inner wall of the rolling groove, and a limit ring is fixedly connected to the end of the transmission frame. A self-locking ring is fixedly connected to both sides of the roller, and the bottom surface of the limit ring cooperates with the self-locking ring.

[0009] Furthermore, in order to limit the rotation of the support shaft, a positioning plate is fixedly connected to the end side surface of the support shaft, and limit grooves are opened on both sides of the lifting groove, with the two ends of the positioning plate slidably installed in the limit grooves.

[0010] Furthermore, in order to ensure that the connecting frame contacts the surface of the rolling wheel after moving downwards, a rubber anti-slip pad is fixedly installed on the top of the inner wall of the rolling groove.

[0011] Furthermore, in order to facilitate stable support of the ladder on the uneven bottom surface, support plates are fixedly connected to both ends of the support shaft, and lifting screws are threadedly connected to the surface of the support plates. A stabilizing plate is fixedly connected to the end of the lifting screws.

[0012] Furthermore, in order to increase the friction when the self-locking ring and the limiting ring come into contact, anti-slip textures are provided on the surface of the self-locking ring and the bottom surface of the limiting ring.

[0013] Furthermore, to facilitate the fixed installation of the connecting bracket at the bottom of the ladder, a connecting groove is provided at one end of the connecting bracket, and positioning holes are provided on both sides of the connecting groove.

[0014] Furthermore, to facilitate the turning of the lifting screw, a turning rod is fixedly connected to the top of the lifting screw.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The connecting frame secures the rollers to the bottom of the ladder, providing mobile support. When the ladder is tilted against a wall, the weight of the ladder exerts downward pressure on the connecting frame. This pressure, combined with the downward movement of the lifting groove relative to the rollers and support axis, causes the limiting rings on both sides of the rolling groove to press against the self-locking rings on both sides of the rollers. The friction generated by this pressure between the bottom of the limiting rings and the self-locking rings effectively prevents the rollers from continuing to rotate. Furthermore, the pressure on the connecting frame increases as the user climbs the ladder, ensuring a stable self-locking function for the rollers. After self-locking, the rollers and the bottom of the ladder contact the ground together, increasing friction between the bottom of the ladder and the ground, effectively reducing slippage and ensuring the stability of the ladder and the safety of the user.

[0017] 2. By turning the lifting screw, the stabilizing plate can be moved up and down. When the ladder is placed on uneven ground, the support height of the stabilizing plate can be adjusted to make the ladder stable and further improve the safety during use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the installation structure of a self-locking anti-slip roller for ladders according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the surface structure of a self-locking anti-slip roller for ladders according to an embodiment of the present utility model;

[0021] Figure 3 This is a side view of a self-locking anti-slip roller for ladders according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the installation structure of the support shaft and the rolling wheel in a self-locking anti-slip roller for ladders according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the rolling groove in a self-locking anti-slip roller for ladders according to an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Connecting frame; 2. Rolling groove; 3. Lifting groove; 4. Support shaft; 5. Rolling wheel; 6. Contraction groove; 7. Telescopic spring; 8. Transmission frame; 9. Limiting ring; 10. Self-locking ring; 11. Positioning plate; 12. Limiting groove; 13. Rubber anti-slip pad; 14. Support plate; 15. Lifting screw; 16. Stabilizing plate; 17. Anti-slip texture; 18. Connecting groove; 19. Positioning hole; 20. Tightening rod; 21. Ladder body. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] According to an embodiment of the present invention, a self-locking anti-slip roller for ladders is provided.

[0028] Example 1:

[0029] like Figures 1-5As shown, a self-locking anti-slip roller for a ladder according to an embodiment of this utility model includes a connecting frame 1 made of hard alloy material. The connecting frame is fixedly installed on one side of the bottom of the ladder body 21. A rolling groove 2 is opened on one side of the bottom of the connecting frame 1. A pair of lifting grooves 3 are opened on both sides of the rolling groove 2. A support shaft 4 is slidably installed inside the lifting groove 3. The two sides of the support shaft 4 are respectively slidably installed in the two lifting grooves 3. A roller 5 is rotatably installed on the surface of the support shaft 4 for moving and supporting the ladder body 21 after it is installed at the bottom. A contraction groove 6 is opened on the surface of both the lifting groove 3 and the support shaft 4. A telescopic spring 7 is installed inside the contraction groove 6. The spring force of the extension spring 7 is used to push the support shaft 4 to the bottom of the lifting groove 3 when the connecting frame 1 is not under pressure. The inner walls of the rolling groove 2 are fixedly connected to the transmission frame 8, and the end of the transmission frame 8 is fixedly connected to the limit ring 9. The two sides of the rolling wheel 5 are fixedly connected to the self-locking ring 10. The self-locking ring 10 is rotatably connected to the support shaft 4. The bottom surface of the limit ring 9 cooperates with the self-locking ring 10. When the connecting frame 1 is subjected to downward pressure, it can move downward relative to the support shaft 4 and the rolling wheel 5, so that the limit ring 9 and the self-locking ring 10 are pressed and contacted with each other. Thus, the self-locking function of the rolling wheel 5 is realized by the friction between the limit ring 9 and the self-locking ring 10.

[0030] like Figures 1-5 As shown, a positioning plate 11 is fixedly connected to the end side surface of the support shaft 4. Limiting grooves 12 are opened on both sides of the lifting groove 3. The two ends of the positioning plate 11 are slidably installed in the limiting grooves 12. Through the sliding cooperation between the limiting grooves 12 and the positioning plate 11, the rotation of the support shaft 4 can be limited. A rubber anti-slip pad 13 is fixedly installed on the top of the inner wall of the rolling groove 2. When the connecting frame 1 moves downward under pressure, it can drive the rubber anti-slip pad 13 to contact the surface of the rolling wheel 5. Through the friction between the rubber anti-slip pad 13 and the surface of the rolling wheel 5, the rotation of the rolling wheel 5 can be further limited. Support plates 14 are fixedly connected to both ends of the support shaft 4. The surface of the support plate 14 is threaded with a lifting mechanism. The lifting screw 15 has a stabilizing plate 16 fixedly connected to its end. By rotating the lifting screw 15, the stabilizing plate 16 can be moved up and down. By adjusting the height of the stabilizing plate 16, the overall support height of the rolling wheel 5 can be adjusted. The surface of the self-locking ring 10 and the bottom surface of the limiting ring 9 are provided with anti-slip textures 17 to increase the friction when the self-locking ring 10 and the limiting ring 9 come into contact. One end of the connecting frame 1 has a connecting groove 18, and both sides of the connecting groove 18 have positioning holes 19 to facilitate fixing the connecting frame 1 to the bottom of the ladder with bolts. The top of the lifting screw 15 is fixedly connected with a turning rod 20 to facilitate turning and adjusting the lifting screw 15.

[0031] This utility model only shows one possible way of working together. In actual use, the roller 5 can also be installed on the other side of the ladder, so that the ladder can be pulled away vertically at an angle.

[0032] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0033] In summary, with the help of the above-mentioned technical solution of this utility model, in actual use, the connecting frame 1 is fixedly installed on the bottom side of the ladder body 21. When one end of the ladder body 1 is used against the wall (when the inclination angle between the ladder body 21 and the ground is greater than 60 degrees), the connecting frame 1 is subjected to downward pressure by the weight of the ladder body 21 itself. It moves downward relative to the rolling wheel 5 and the support shaft 4 through the lifting groove 3, causing the limiting rings 9 on both sides of the inner wall of the rolling groove 2 to press against the self-locking rings 10 on both sides of the rolling wheel 5. The friction generated by the pressing between the bottom surface of the limiting ring 9 and the self-locking ring 10 can... The rollers 5 are effectively prevented from continuing to rotate, and the bottom rollers 5 are self-locking when the user climbs the ladder. This allows the bottom of the ladder body 21 to be in contact with the ground simultaneously through the rollers 5 and the bottom of the ladder body 21, increasing the stability of the ladder body 21 during use. When the ladder body 21 is not in use and needs to be moved, the ladder body 21 is tilted (so that the angle between the ladder body 21 and the ground is less than 60 degrees). At this time, the weight of the ladder body 21 cannot push the connecting frame 1, and the connecting frame 1 will not move downward. The rollers 5 can provide moving support for the ladder body 21, making it convenient to move the ladder body 21.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking anti-skid roller for a ladder, characterized by, The utility model provides a kind of ladder, including connecting frame (1), connecting frame (1) is fixedly installed in the bottom side of ladder body (21), one side of connecting frame (1) is provided with rolling groove (2), both sides of rolling groove (2) are provided with lifting groove (3), supporting shaft (4) is slidably installed in the inside of lifting groove (3), rolling wheel (5) is rotatably installed on the surface of supporting shaft (4), and the surface of lifting groove (3) and supporting shaft (4) is provided with shrinkage groove (6), retractable spring (7) is fittedly installed in the inside of shrinkage groove (6), transmission frame (8) is fixedly connected on the inner wall both sides of rolling groove (2), limit ring (9) is fixedly connected in the end of transmission frame (8), self-locking ring (10) is fixedly connected on the both sides of rolling wheel (5), and the bottom surface of limit ring (9) is matched with self-locking ring (10).

2. The self-locking anti-skid roller for ladder according to claim 1, characterized in that, The end side surface of supporting shaft (4) is fixedly connected with positioning plate (11), and both sides of lifting groove (3) are provided with limiting groove (12), and both ends of positioning plate (11) are slidably installed in limiting groove (12).

3. The self-locking anti-skid roller for ladder according to claim 1, characterized in that, The inner wall top of rolling groove (2) is fixedly installed with rubber non-slip pad (13).

4. The self-locking anti-skid roller for ladder according to claim 1, characterized in that, The both ends of supporting shaft (4) are fixedly connected with support plate (14), and the surface of support plate (14) is threadedly connected with lifting screw (15), and the end of lifting screw (15) is fixedly connected with firm plate (16).

5. The self-locking anti-skid roller for ladder according to claim 1, wherein, The surface of self-locking ring (10) and the bottom surface of limit ring (9) are all provided with anti-skid line (17).

6. The self-locking anti-skid roller for ladder according to claim 1, characterized in that, One end of connecting frame (1) is provided with connecting groove (18), and both sides of connecting groove (18) are provided with positioning hole (19).

7. The self-locking anti-skid roller for ladder according to claim 1, characterized in that, The top of lifting screw (15) is fixedly connected with screwing rod (20).

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