Telescopic aluminum ladder

Abstract

The utility model relates to the technical field of automobile accessories, in particular to a telescopic aluminum ladder, which can flexibly adjust the height of the ladder according to actual requirements through the extension of a telescopic ladder relative to a main body ladder and the up-and-down sliding extension of an extension ladder relative to the main body ladder. The extension ladder and the extension ladder are respectively fixed on the main body ladder through the first locking piece and the second locking piece, so that the stability of the ladder when the ladder is unfolded for use is ensured, and meanwhile, the reflective strips are arranged on the pedals, so that the visibility can be improved in an environment with insufficient light, the potential safety hazard of a user under a low-light condition is reduced, and the ladder can adapt to different use scenes; therefore, the adaptability of the ladder is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive supplies technology, and in particular to a retractable aluminum ladder. Background Technology

[0002] A ladder is a climbing tool consisting of rungs (steps) and side panels (uprights). By providing a stable support structure, it helps users overcome vertical or horizontal height differences to complete tasks such as climbing, maintenance, and rescue. It is mainly used in homes, industry and construction, fire fighting and rescue, and power industries. Based on structural type, it can be divided into straight ladders, A-frame ladders, and folding ladders.

[0003] Currently, most existing straight ladders are supported on one side and need to be used against a fixed object, such as a wall. Furthermore, straight ladders are designed as single ladders, so the height cannot be adjusted. At the same time, when used in low-light environments at night, the visibility is low, and there is a risk of users falling into the air, resulting in low adaptability of the ladders. Utility Model Content

[0004] The purpose of this utility model is to provide a retractable aluminum ladder, which addresses the shortcomings of the existing technology and aims to solve the technical problem that existing straight ladders are designed as single ladders, cannot be adjusted in height, pose a risk in low-light environments, and have low adaptability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A retractable aluminum ladder includes a main ladder, a telescopic ladder inserted at the bottom of the main ladder, and an extension ladder slidably disposed on the back of the main ladder. The main ladder includes multiple first steps and two first columns connected to both ends of the first steps. The extension ladder includes multiple second steps and two second columns connected to both ends of the second steps. Each first step and each second step is provided with a reflective strip.

[0007] The first column has a cavity, the telescopic ladder is inserted into the cavity and extends and retracts vertically, and a first locking element is provided between the first column and the telescopic ladder;

[0008] The first column has a slider on its back and a slide rail on the side of the second column facing the slider. The slider and the slide rail are slidably connected to allow the extension ladder to extend and retract vertically. A second locking device is provided between the first column and the second column.

[0009] The present invention is further configured such that: the bottom of the first column is provided with a first locking hole communicating with the cavity, and the inner side of the telescopic ladder is provided with a plurality of first adjustment holes, the first locking hole and the first adjustment hole are corresponding to each other, and the first locking member is fixed between the first locking hole and the first adjustment hole.

[0010] The present invention is further configured such that: the top of the first column is provided with a second locking hole communicating with the cavity, the second locking hole passes through the slider, and a plurality of second adjusting holes are provided in the slide rail of the second column, the second locking hole corresponds to the second adjusting hole, and the second locking member is fixed between the second locking hole and the second adjusting hole.

[0011] The present invention is further configured such that: two L-shaped connecting blocks are provided at the connection between the first pedal and the first column, the second pedal and the second column.

[0012] The present invention is further configured such that: both the top surfaces of the first pedal and the second pedal are provided with locking grooves, and the reflective strip is embedded in the locking grooves so that the reflective strip is placed between the two connecting blocks.

[0013] The present invention is further configured such that a U-shaped sealing block is provided at the top of the first column and at the bottom of the second column.

[0014] The present invention is further configured such that a capped hook is provided on the top of the second column.

[0015] The present invention is further provided that: the bottom of the telescopic ladder is rotatably connected to a support foot.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This utility model allows the telescopic ladder to extend and retract relative to the main ladder, and the extension ladder to slide and extend and retract relative to the main ladder, thereby flexibly adjusting the height of the ladder according to actual needs. The telescopic ladder and the extension ladder are fixed to the main ladder by the first locking member and the second locking member respectively, ensuring the stability of the ladder when it is unfolded and used. At the same time, the reflective strips on the steps can improve visibility in low light environments, reduce safety hazards for users in low light conditions, and adapt to different usage scenarios, thereby improving the adaptability of the ladder. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

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

[0020] Figure 3 This is a schematic diagram of the main ladder structure in this utility model;

[0021] Figure 4 This is a structural schematic diagram of the telescopic ladder in this utility model;

[0022] Figure 5 This is a schematic diagram of the extension ladder in this utility model;

[0023] Figure 6 This is a schematic diagram of the installation structure of the reflective strip in this utility model.

[0024] The details of the reference numerals used in the above figures are as follows:

[0025] 1-Main ladder, 11-First step, 111-Clamping groove, 12-First column, 121-Cavity, 122-Slider, 123-First locking hole, 124-Second locking hole;

[0026] 2-Telescopic ladder, 21-First adjustment hole, 22-Support leg;

[0027] 3-Extension ladder, 31-Second step, 32-Second column, 321-Slide rail, 322-Second adjustment hole, 323-Hook;

[0028] 4-First locking element, 5-Second locking element, 6-Reflective strip, 7-Connecting block, 8-Sealing block. Detailed Implementation

[0029] In the description of this application, the term "multiple roots" refers to two or more roots (including two). Technical terms such as "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary / secondary relationship of the indicated technical features. Terms such as "installation," "connection," and "linking" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In the description of this application, the technical terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0031] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings, so as to understand in detail how to solve the problems raised in the background art.

[0032] like Figures 1 to 6 As shown, a retractable aluminum ladder includes a main ladder 1, a telescopic ladder 2 inserted at the bottom of the main ladder 1, and an extension ladder 3 slidably disposed on the back of the main ladder 1. The main ladder 1 includes multiple first steps 11 and two first columns 12 connected to both ends of the first steps 11. The extension ladder 3 includes multiple second steps 31 and two second columns 32 connected to both ends of the second steps 31. Each first step 11 and second step 31 is provided with a reflective strip 6. The first column 12 has a cavity 121, and the telescopic ladder 2 is inserted into the cavity 121 to extend and retract vertically. A first locking member 4 is provided between the first column 12 and the telescopic ladder 2. A slider 122 is provided on the back of the first column 12, and a slide rail 321 is provided on the side of the second column 32 facing the slider 122. The slider 122 is slidably connected to the slide rail 321 to allow the extension ladder 3 to extend and retract vertically. A second locking member 5 is provided between the first column 12 and the second column 32.

[0033] Through the above scheme, the telescopic ladder 2 can be inserted into the cavity 121 of the first column 12, so as to change the insertion depth of the telescopic ladder 2 to adjust the overall length of the ladder and allow the extension ladder 3 to slide up and down relative to the main ladder 1. Thus, the height can be flexibly adjusted according to actual needs. Then, the telescopic ladder 2 and the extension ladder 3 are fixed to the main ladder 1 by the first locking member 4 and the second locking member 5 respectively, ensuring the stability of the ladder when it is unfolded and used. At the same time, the reflective strip 6 is set on the step to improve visibility in low light environment, reduce the safety hazards of users in low light conditions, adapt to different usage scenarios, and thus improve the adaptability of the ladder.

[0034] In this embodiment, the main ladder 1, telescopic ladder 2, and extension ladder 3 are all made of aluminum alloy sheet, featuring lightweight and high strength. The first locking element 4 and the second locking element 5 are both long screws with threaded structures. The first step 11, the second step 31, the first column 12, and the second column 32 are all rectangular structures. The slider 122 is a T-shaped block. The first column 12 and the slider 122 are integrally formed. The slide rail 321 is formed by installing two opposing L-shaped blocks onto the side of the extension ladder 3, with the two L-shaped blocks integrally formed with the extension ladder 3. There is a gap between the two L-shaped blocks, which allows the T-shaped slider 122 to pass through, thereby enabling the slider 122 to... The sliding connection between the extension ladder 2 and the slide rail 321 allows the extension ladder 3 to extend and retract along the main ladder 1. The cavity 121 is set along the length of the first column 12. The extension ladder 2 is inserted into the cavity 121 starting from the bottom of the first column 12, so that the insertion depth of the extension ladder 2 can be adjusted, thereby realizing the extension and retraction of the extension ladder 2. The reflective strip 6 can be a rectangular block with a wave structure on the top surface. The reflective strip 6 can reflect the surrounding light in a low-light environment, improve visibility, and thus prevent the user from stepping into a hole. At the same time, the reflective strip 6 is installed on the step, which can also increase the friction of the step surface, prevent the user from slipping after stepping on the step, and improve the safety of the ladder.

[0035] like Figures 1 to 4As shown, in one specific embodiment of the improvement, the bottom of the first column 12 is provided with a first locking hole 123 that communicates with the cavity 121, and the inner side of the telescopic ladder 2 is provided with a plurality of first adjustment holes 21. The first locking hole 123 corresponds to the first adjustment hole 21, and the first locking member 4 is fixed between the first locking hole 123 and the first adjustment hole 21. Specifically, the first locking hole 123 is a threaded hole, and the first adjusting hole 21 has six through holes, which are evenly distributed. The first locking component 4 has a long screw, and the screw shank near the head is threaded. The front end of the screw shank is a smooth cylindrical shape. Based on this, in actual installation and adjustment, firstly, the telescopic ladder 2 is inserted into the cavity 121, and the insertion depth of the telescopic ladder 2 is adjusted so that one of the first adjusting holes 21 corresponds to the first locking hole 123. Then, the first locking component 4 is screwed into the first locking hole 123, thereby inserting the front end of the first locking component 4 into the first adjusting hole 21, realizing the limiting and fixing of the telescopic ladder 2. Of course, when the telescopic ladder 2 is adjusted up and down again, it is only necessary to... Loosen the first locking piece 4, adjust the length of the telescopic ladder 2 inserted into the first column 12, and then tighten the first locking piece 4. The two ends of the first step 11 are fixed by inserting two columns. At this time, the front part of the first step 11 is embedded in the column. Therefore, the telescopic ladder 2 has two protruding extension sections on the side facing the first step 11. There is a gap between the two extension sections, so that the embedded part of the first step 11 can be placed in the gap. This avoids the telescopic ladder 2 from being unable to be adjusted due to the first step 11 blocking it when it extends and retracts. The structure is reasonable. It is worth noting that the length of the telescopic ladder 2 can be the distance between the two first steps 11, so as to avoid the first step 11 being too high and affecting the user's climbing.

[0036] like Figures 1 to 3 and Figure 5As shown, in one specific embodiment of the improvement, the top of the first column 12 is provided with a second locking hole 124 communicating with the cavity 121. The second locking hole 124 passes through the slider 122. Multiple second adjustment holes 322 are provided in the slide rail 321 of the second column 32. The second locking hole 124 corresponds to the second adjustment holes 322, and the second locking member 5 is fixed between the second locking hole 124 and the second adjustment hole 322. Specifically, the second locking hole 124 passes through the main ladder 1, and has threads on the front hole of the main ladder 1, but no threads on the back hole. The second locking member 5 has the same structure as the first locking member 4, but its length is greater than the length of the first locking member 4 and the width of the main ladder 1. There are four through holes 322 on one second column 32, and the four through holes are equidistantly distributed. The distance between two adjacent second adjustment holes 322 is the same as the distance between two adjacent second pedals 31. Based on this, in actual operation, the slider is first... After aligning and snapping the slide rail 321 with the extension ladder 122, adjust the extension length of the extension ladder 3 so that the second locking hole 124 is aligned with one of the second adjustment holes 322. Then insert the second locking member 5 into the second locking hole 124 so that the front end of the second locking member 5 passes through the main ladder 1 and is embedded in the second adjustment hole 322. The second locking member 5 is screwed to the main ladder 1, thereby fixing the extension ladder 3 to the main ladder 1. When the extension ladder 3 needs to be adjusted again, simply loosen the second locking member 5, insert the front end of the second locking member 5 into the other second adjustment hole 322, and then tighten it.

[0037] like Figure 3 and Figure 5 As shown, in one specific embodiment of the improvement, two L-shaped connecting blocks 7 are provided at the connection points between the first step 11 and the first column 12, the second step 31 and the second column 32. Specifically, the main ladder 1 consists of two first columns 12 and four first steps 11, the extension ladder 3 consists of two second columns 32 and three second steps 31, and the telescopic ladder 2 is installed at the bottom of the main ladder 1. Thus, the telescopic ladder 2 can be pulled down to change the length of the ladder. Therefore, the telescopic ladder 2 can be composed of two rectangular support columns similar to the first columns 12. The first step 11 is vertically connected to the first column 12, and the second step 31 is vertically connected to the second column 32. The first step 11 and the second step 31 have the same structure. One end of the L-shaped connecting block 7 is fixed to the first column 12, and the other end is fixed to the first step 11. Each connection point of the first step 11 and the second column 32 has two connecting blocks 7, which can be fixed by screws. Of course, the second step 31 and the second column 32 are also equipped with connecting blocks 7 in the same way as described above, which can ensure the structural strength and stability of the ladder.

[0038] As shown in Figure 6, in one specific embodiment of the improvement, both the top surfaces of the first pedal 11 and the second pedal 31 are provided with locking grooves 111. The reflective strip 6 and the connecting block 7 above the pedal are embedded in the locking grooves 111, with the reflective strip 6 positioned between the two connecting blocks 7. Specifically, the reflective strip 6 has a rectangular structure and downwardly angled flange edges on both sides. Since the first pedal 11 and the second pedal 31 have the same structure, the top surface of the first pedal 11 has arc-shaped extensions along both sides, with a gap between the two extensions. This allows the two extensions to engage with the top surface of the first pedal 11 to form the locking grooves 111. The reflective strip 6 is inserted from the side of the first pedal 11 and the second pedal 31 to fix it. Simultaneously, the width of the fixing portion of the connecting block 7 to the first pedal 11 and the second pedal 31 is smaller than the gap between the two extensions, allowing the connecting block 7 to... Placed in the clamping groove 111, the connecting blocks 7 on both sides clamp and limit the reflective strip 6, preventing the reflective strip 6 from falling off or shifting. It should be noted that the first pedal 11 and the second pedal 31 have the same structure, and the top surfaces of the first pedal 11 and the second pedal 31 are both inclined surfaces. The two sides of the clamping groove 111 of the first pedal 11 and the second pedal 31 are also provided with wave-shaped protrusions to improve friction and facilitate users to step on and climb. When the extension ladder 3 is in the retracted state, the first pedal 11 and the second pedal 31 can be spliced ​​together to increase the overall stepping area, which is beneficial to the user's climbing.

[0039] like Figure 3 and Figure 5 As shown, in one specific embodiment of the improvement, U-shaped sealing blocks 8 are provided at the top of the first column 12 and the bottom of the second column 32. Specifically, the first column 12 and the second column 32 have the same overall structure, both being rectangular structures. The first column 12 has a cavity 121, and similarly, the second column 32 also has a cavity 121. Four sealing blocks 8 are provided. Since the telescopic ladder 2 is inserted into the bottom of the first column 12, the sealing blocks 8 can cover the cavities 121 of the first column 12 and the second column 32, and are then fixed to the main ladder 1 and the extension ladder 3 by screws. This ensures the sealing of the first column 12 and the second column 32, improves the waterproof effect of the main ladder 1, and thus improves the adaptability of the ladder.

[0040] like Figure 1 , Figure 2 and Figure 4As shown, in one specific embodiment of the improvement, a cover-type hook 323 is provided on the top of the second column 32. Specifically, two hooks 323 are provided, and the hook 323 can be composed of a U-shaped block and a hook. The U-shaped block can cover the top of the second column 32, that is, cover the top opening of the cavity 121 of the second column 32. The U-shaped block is then fixed to the second column 32 with screws. In conjunction with the sealing block 8 mentioned above, the cavity 121 of the second column 32 is sealed, which can ensure the sealing performance of the second column 32, improve the waterproof effect of the extension ladder 3, and thus improve the adaptability of the ladder.

[0041] like Figure 1 , Figure 2 and Figure 4 As shown, in one specific embodiment of the improvement, the bottom of the telescopic ladder 2 is rotatably connected to a support foot 22. Specifically, the structure of the telescopic ladder 2 and the support foot 22 forms the support structure of the entire ladder. The support foot 22 includes a U-shaped block and extended sides connected to both sides of the base plate of the U-shaped block. The two extended sides are integrally formed with the base plate of the U-shaped block and form an arch bridge structure. The front end of the extended side is provided with a wave structure, which can enhance the friction between the support foot 22 and the ground. The two symmetrical side plates of the U-shaped block are provided with corresponding fixing holes. At the same time, the bottom of the telescopic ladder 2 is also provided with a through hole. During installation, it can be fixed by a smooth bolt and a screw. That is, the smooth bolt passes through the through hole of the telescopic ladder 2 to the fixing hole, so that the telescopic ladder 2 can rotate relative to the bolt. The bottom surface of the bolt is provided with a screw hole, and the aforementioned screw can be... Fixed to the screw hole, the telescopic ladder 2 and the support leg 22 are rotatably connected. Of course, several washers are fitted on the bolt during installation. The washers are distributed on both sides of the telescopic ladder 2 to prevent the telescopic ladder 2 from shifting left and right. In real life, if you encounter an inclined, uneven or bumpy ground, you can first adjust the support leg 22 so that it can fit against the ground, and then rotate the telescopic ladder 2 to make the main ladder 1 and the extension ladder 3 lean against it. If you encounter a level ground, the telescopic ladder 2 can be rotated directly after the support leg 22 is placed on the ground. Compared with the traditional structure where the support leg and ladder are fixed, when the telescopic ladder 2, the main ladder 1 and the extension ladder 3 lean against each other, the contact area between the support leg 22 and the ground is increased, which improves the safety and adaptability of the ladder.

[0042] In this embodiment, before use, the telescopic ladder 2 can be pulled out or pushed into the main ladder 1 according to actual needs. When pulling out or pushing the telescopic ladder 2, the first locking member 4 should be loosened first. After adjusting the telescopic ladder 2, the first locking member 4 should be fixed. Then, the extension ladder 3 can be pulled up or down relative to the main ladder 1. When pulling up or down the extension ladder 3, the second locking member 5 should be loosened first. After adjusting the extension ladder 3, the second locking member 5 should be fixed, thus completing the height adjustment of the ladder. Finally, the reflective strip 6 can be directly installed into the first step 11 and the second step 31. Then, the first step 11 and the second step 31 are inserted into the first column 12 and the second column 32 respectively. Finally, the overall installation of the ladder is completed.

[0043] The ladder in this embodiment can be used for climbing up and down cars, especially since many cars are now equipped with tents for use on the roof, sides, and rear of the car. The height can be adjusted by using a ladder, which helps users to quickly set up the tent.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A retractable aluminum ladder, characterized in that, The system includes a main ladder, a telescopic ladder inserted at the bottom of the main ladder, and an extension ladder slidably disposed on the back of the main ladder. The main ladder includes multiple first steps and two first columns connected to both ends of the first steps. The extension ladder includes multiple second steps and two second columns connected to both ends of the second steps. Each first step and each second step is provided with a reflective strip. The first column has a cavity, the telescopic ladder is inserted into the cavity and extends and retracts vertically, and a first locking member is provided between the first column and the telescopic ladder; A slider is provided on the back of the first column, and a slide rail is provided on the side of the second column facing the slider. The slider is slidably connected to the slide rail so that the extension ladder can extend and retract vertically. A second locking member is provided between the first column and the second column.

2. The retractable aluminum ladder according to claim 1, characterized in that, The bottom of the first column is provided with a first locking hole that communicates with the cavity. The inside of the telescopic ladder is provided with a plurality of first adjustment holes. The first locking hole corresponds to the first adjustment hole, and the first locking member is fixed between the first locking hole and the first adjustment hole.

3. The retractable aluminum ladder according to claim 2, characterized in that, The top of the first column is provided with a second locking hole that communicates with the cavity. The second locking hole passes through the slider. The slide rail of the second column is provided with a plurality of second adjustment holes. The second locking hole corresponds to the second adjustment hole, and the second locking member is fixed between the second locking hole and the second adjustment hole.

4. The retractable aluminum ladder according to claim 1, characterized in that, Two L-shaped connecting blocks are provided at the connection points between the first pedal and the first column, and between the second pedal and the second column.

5. A retractable aluminum ladder according to claim 4, characterized in that, Both the first pedal and the second pedal have locking grooves on their top surfaces, and the reflective strip is embedded in the locking grooves so that the reflective strip is positioned between the two connecting blocks.

6. A retractable aluminum ladder according to claim 4, characterized in that, Both the top of the first column and the bottom of the second column are provided with U-shaped sealing blocks.

7. A retractable aluminum ladder according to claim 6, characterized in that, The top of the second column is equipped with a cover-type hook.

8. A retractable aluminum ladder according to claim 1, characterized in that, The bottom of the telescopic ladder is rotatably connected to a support leg.

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