Folding ladder stand

Abstract

A folding ladder stand comprises a first ladder stand unit, a second ladder stand unit, a folding connecting piece used for increasing the splicing straightness of the two ladder stand units and a locking sleeve used for locking the two ladder stand units, one end of the folding connecting piece is rotationally connected with the first ladder stand unit and / or the second ladder stand unit, and the other end of the folding connecting piece is rotationally connected with the locking sleeve. The other end of the folding connecting piece is in sliding connection with the first ladder stand unit and / or the second ladder stand unit, the folding ladder stand is folded by rotating the folding connecting piece relative to the first ladder stand unit and the second ladder stand unit, and the folding ladder stand is moved by moving the folding connecting piece relative to the first ladder stand unit and the second ladder stand unit. The first crawling ladder unit and the second crawling ladder unit are adjusted to the same plane; the locking sleeve is matched with the connecting position of the two ladder stand units, namely, the locking sleeve is connected to the connecting position of the two ladder stand units in a sleeving mode, so that the two ladder stand units are locked on the same plane, and the stability of the folding ladder stand in the unfolded state is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of ladder technology, specifically relating to a folding ladder. Background Technology

[0002] Ladders are often needed inside RVs. Existing ladders mainly include two types: (1) integrated ladders (such as an indoor ladder disclosed in application number 2020217219572), which have a fixed structure and cannot be folded, occupying a large amount of interior space in the RV and cannot be used in small RVs; (2) folding ladders (such as a convenient assembly double-pole folding insulated ladder and its assembly method disclosed in application number 2024110859551), which occupy less interior space in the RV and can be adapted to RVs of different sizes. Currently, most folding ladders on the market connect two ladder units directly through hinges. When two ladder units are spliced ​​into one ladder, the relative position between the ladder unit and the hinge is fixed, which easily leads to the phenomenon that the end faces of the two ladder units cannot fit together, resulting in the two ladder units not being able to be located in the same plane after assembly, affecting the stability of the ladder. Summary of the Invention

[0003] To address the above shortcomings, the technical problem to be solved by this utility model is to provide a folding ladder that ensures that all ladder units are located on the same plane after the folding ladder is unfolded, thereby increasing the stability of the folding ladder in the unfolded state.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0005] A folding ladder includes: at least two ladder units, a folding connector for increasing the flatness of the two ladder units during assembly, and a locking sleeve for locking the two ladder units. One end of the folding connector is rotatably connected to a ladder unit, and the other end of the folding connector is slidably connected to another ladder unit so that the two ladder units can be slidably spliced ​​together. The locking sleeve is adapted to the connection point of the two ladder units, and the two ladder units are locked on the same plane by the locking sleeve.

[0006] As a preferred embodiment of this utility model, each ladder unit is rotatably mounted with a set of folding connectors, and the folding connectors are slidably connected to adjacent ladder units.

[0007] In a preferred embodiment of this utility model, the adjacent folding connectors are connected by a connecting shaft, so that the folding connectors swing around the connecting shaft.

[0008] As a preferred embodiment of this utility model, the ladder unit is provided with a sliding groove, and the folding connector is slidably connected to the ladder unit through the sliding groove.

[0009] As a preferred embodiment of this utility model, the ladder unit is provided with a rotating groove, and the folding connector is rotatably connected to the ladder unit through the rotating groove.

[0010] As a preferred embodiment of this utility model, the folding connector includes a connecting piece and a rotating shaft and a sliding shaft respectively connected to the connecting piece. The connecting piece is rotatably connected to the climbing unit through the rotating shaft, and the connecting piece is slidably connected to another climbing unit through the sliding shaft.

[0011] As a preferred embodiment of this utility model, the ladder unit is provided with a hinge sleeve, and the folding connector is connected to the ladder unit through the hinge sleeve.

[0012] As a preferred embodiment of this utility model, the ladder unit is provided with a spring buckle for increasing the friction between the locking sleeve and the ladder unit.

[0013] As a preferred embodiment of this utility model, the top of the folding ladder is provided with a hook, and the middle of the hook is provided with a limiting groove for limiting the hook.

[0014] As a preferred embodiment of this utility model, the folding ladder is equipped with a hook, which has a hook shaft and a limiting plate. The hook is hooked onto the hook shaft, and the limiting plate is inserted into the limiting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) Compared with ordinary hinge connection, the folding connector of this application can realize the relative movement of two ladder units on the basis of realizing the rotational connection of two ladder units, which makes it easy to adjust the two ladder units to the same plane, thereby ensuring the stability of the folding ladder in the unfolded state.

[0016] (2) By setting folding connectors on each ladder unit, the connection stability between ladder units can be ensured, and the phenomenon of separation between adjacent ladder units can be prevented.

[0017] (3) Multiple folding connectors are connected by a connecting shaft, so that all the folding connectors rotate around the connecting shaft, thereby ensuring stable swinging or sliding motion between adjacent climbing units.

[0018] (4) During the unfolding process of this folding ladder, the locking sleeve slides between two adjacent ladder units under its own weight, thereby locking the folding ladder in the unfolded state. Furthermore, the spring buckle facilitates damping of the locking sleeve, thereby preventing the locking sleeve from slipping during use and further improving the ease of use of the folding ladder.

[0019] (5) The sum of the lengths of the first ladder unit and the hook is greater than the sum of the lengths of the second ladder unit and the anti-slip sleeve. When the folding ladder is folded, the ladder unit connected to the hook contacts the ground first, so that a certain angle is formed between the two ladder units. This avoids a large clamping force on the user's hand due to the excessive speed of the upper folding ladder unit falling during the folding process, thus improving the safety of the ladder. Attached Figure Description

[0020] Figure 1 This is an exploded view of the folding ladder.

[0021] Figure 2 This is a magnified view of a portion of point A.

[0022] Figure 3 This is an exploded view of the folded connection, the first connecting pipe, and the second connecting pipe.

[0023] Figure 4 This is a schematic diagram of the connection between the folded connection, the first connecting pipe, and the second connecting pipe.

[0024] Figure 5 This is a schematic diagram of the working process of the folding connector during the folding and unfolding process of this folding ladder.

[0025] Figure 6 This is a schematic diagram of the folding ladder in its unfolded state.

[0026] Figure 7 This is an assembly diagram of the hook and the mounting bracket.

[0027] Figure 8 This is a schematic diagram showing the shape changes of the folding connectors during the unfolding and folding process of a folding ladder.

[0028] Reference numerals: First climbing ladder unit 1-1, Second climbing ladder unit 1-2, Folding connector 2, First connecting pipe 2A, First pivot hole 2A-1, First slide groove 2A-2, Second connecting pipe 2B, First pivot hole 2B-1, Second slide groove 2B-2, Spring buckle hole 2B-3, First connecting piece 2C, Second connecting piece 2D, Middle connecting shaft 2E, First pivot 2F-1, Second pivot 2F-2, First sliding shaft 2G-1, Second sliding shaft 2G-2, Partition 2H, Spring buckle 2J, Spring buckle head 2J-1, Locking sleeve 3, Step plate 4, Cover plate 5, Climbing ladder tube 6, Anti-slip sleeve 7, Hook 8, Hanging piece 9. Detailed Implementation

[0029] The present invention will now be further described with reference to the accompanying drawings.

[0030] A folding ladder includes a first ladder unit 1-1 and a second ladder unit 1-2, a folding connector 2 for increasing the flatness of the two ladder units 1 during assembly, and a locking sleeve 3 for locking the two ladder units 1. One end of the folding connector 2 is rotatably connected to the first ladder unit 1-1 and / or the second ladder unit 1-2, and the other end of the folding connector 2 is slidably connected to the first ladder unit 1-1 and / or the second ladder unit 1-2. The folding ladder is folded by rotating the folding connector 2 relative to the first ladder unit 1-1 and the second ladder unit 1-2, and the first ladder unit 1-1 and the second ladder unit 1-2 are adjusted to be on the same plane by moving the folding connector 2 relative to the first ladder unit 1-1 and the second ladder unit 1-2. The locking sleeve 3 is adapted to the connection point of the two ladder units 1, that is, the locking sleeve 3 is sleeved on the connection point of the two ladder units 1, thereby locking the two ladder units 1 on the same plane and ensuring the stability of the folding ladder in the unfolded state.

[0031] When the folding ladder needs to be unfolded, the first ladder unit 1-1 and the second ladder unit 1-2 are rotated relative to the folding connector 2 to adjust the first ladder unit 1-1 and the second ladder unit 1-2 to the same plane. Then, the first ladder unit 1-1 and the second ladder unit 1-2 slide relative to the folding connector 2 to make the first ladder unit 1-1 and the second ladder unit 1-2 abut against each other. Finally, the ladder is locked by the locking sleeve 3.

[0032] The folding connector 2 includes two first connecting pieces 2C and two second connecting pieces 2D, which are alternately stacked and connected at their midpoints via a central connecting shaft 2E. One end of the first connecting piece 2C is rotatably connected to the first ladder unit 1-1 via a first rotating shaft 2F-1, and a first sliding shaft 2G-1 is installed at the other end of the first connecting piece 2C. The first sliding shaft 2G-1 is slidably connected to the second ladder unit 1-2, and two spacers 2H corresponding to the positions of the second connecting pieces 2D are installed on the first sliding shaft. Similarly, one end of the second connecting piece 2D is rotatably connected to the second climbing ladder unit 1-2 via the second rotating shaft 2F-2, and the other end of the second connecting piece 2D is equipped with a second sliding shaft 2G-2, which is slidably connected to the first climbing ladder unit 1-1. Two partitions 2H corresponding to the positions of the first connecting piece 2C are installed on the second sliding shaft 2G-2. The thickness of the partitions 2H is slightly greater than the thickness of the first connecting piece 2C and the second connecting piece 2D, thereby reducing the relative friction between the first connecting piece 2C and the second connecting piece 2D and increasing the service life of the first connecting piece 2C and the second connecting piece 2D.

[0033] The two ends of the folding connector 2 are respectively connected to a first connecting pipe 2A and a second connecting pipe 2B. The first connecting pipe 2A is fixed in the first climbing ladder unit 1-1, and the second connecting pipe 2B is fixed in the second climbing ladder unit 1-2. The first connecting pipe 2A is provided with a first sliding groove 2A-2 and a first rotating shaft groove. The second sliding shaft 2G-2 is slidably installed in the first sliding groove 2A-2. The first rotating shaft groove is provided with a first rotating shaft hole 2A-1, and the first rotating shaft 2F-1 is connected to the first rotating shaft hole 2A-1. The second connecting pipe 2B is provided with a second sliding groove 2B-2 and a second rotating shaft groove. The first sliding shaft 2G-1 is slidably installed in the second sliding groove 2B-2. The second rotating shaft groove is provided with a first rotating shaft hole 2B-1, and the second rotating shaft 2F-2 is connected to the first rotating shaft hole 2B-1.

[0034] Cover plates 5 are provided at the ends of the first connecting pipe 2A and the second connecting pipe 2B. The cover plates 5 close the first connecting pipe 2A and the second connecting pipe 2B to prevent dust and particulate matter from entering the first connecting pipe 2A and the second connecting pipe 2B and affecting the operation of the folding connector 2.

[0035] In some embodiments, the first slide groove 2A-2 and the first pivot hole 2A-1 can be arranged in the first climbing ladder unit 1-1, and the second slide groove 2B-2 and the first pivot hole 2B-1 can be arranged in the second climbing ladder unit 1-2.

[0036] A spring-loaded hole 2B-3 is provided on the second connecting pipe 2B. The spring-loaded buckle 2J is arranged inside the second connecting pipe 2B, and the spring-loaded head 2J-1 of the spring-loaded buckle 2J extends to the outside of the second climbing ladder unit 1-2 through the spring-loaded hole 2B-3, so that the spring-loaded head 2J-1 abuts against the inner wall of the locking sleeve 3, so that a certain frictional force is generated between the locking sleeve 3 and the spring-loaded buckle 2J, thereby damping the sliding of the locking sleeve 3.

[0037] The first climbing ladder unit 1-1 and the second climbing ladder unit 1-2 have the same structure, both including two climbing ladder tubes 6 and a step plate 4 connected between the two climbing ladder tubes 6. The folding connector 2 is connected to the climbing ladder tubes 6 of the first climbing ladder unit 1-1 and the second climbing ladder unit 1-2.

[0038] The first climbing ladder unit 1-1 is located below the second climbing ladder unit 1-2. To ensure the stability of the locking sleeve 3, when the folding ladder is unfolded, the bottom of the locking sleeve 3 abuts against the topmost step plate 1-4 of the first climbing ladder unit 1-1.

[0039] An anti-slip sleeve 7 is provided at the bottom of the first climbing ladder unit 1-1 to improve the anti-slip performance of the bottom of the folding ladder. A hook 8 is provided at the top of the second climbing ladder unit 1-2. The hook 8 is used to connect with the mounting bracket 9 on the RV to ensure the stability of the top of the folding ladder.

[0040] The sum of the lengths of the first ladder unit 1-1 and the anti-slip sleeve 7 is less than the sum of the lengths of the second ladder unit 1-2 and the hook 8. When the folding ladder is folded, the second ladder unit 1-2 contacts the ground first, so that a certain angle is formed between the first ladder unit 1-1 and the second ladder unit 1-2. This avoids a large clamping force on the user's hand due to the second ladder unit 1-2 falling too fast during the folding process, thus improving the safety of using the ladder.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0042] Although this document uses many terms corresponding to the reference numerals in the figures, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A folding ladder characterized by, The utility model relates to a folding ladder unit, comprising: a first ladder unit (1-1), a second ladder unit (1-2), a folding connecting piece (2) for increasing the assembly flatness of the first ladder unit (1-1) and the second ladder unit (1-2), and a locking sleeve (3) for locking the first ladder unit (1-1) and the second ladder unit (1-2), one end of the folding connecting piece (2) is rotatably connected with the first ladder unit (1-1) and / or the second ladder unit (1-2), the other end of the folding connecting piece (2) is slidably connected with the first ladder unit (1-1) and / or the second ladder unit (1-2), so that the two ladder units (1) are slidably assembled, the locking sleeve (3) is adapted to the connection between the two ladder units (1), and the two ladder units (1) are locked in the same plane by the locking sleeve (3).

2. A folding ladder according to claim 1, wherein, The folding connecting piece (2) comprises a first connecting piece (2C) and a second connecting piece (2D), one end of the first connecting piece (2C) is rotatably connected with the first ladder unit (1-1), the other end is slidably connected with the second ladder unit (1-2), one end of the second connecting piece (2D) is rotatably connected with the second ladder unit (1-2), the other end is slidably connected with the first ladder unit (1-1).

3. A folding ladder according to claim 2, wherein, The middle parts of the first connecting piece (2C) and the second connecting piece (2D) are rotatably connected by a middle connecting shaft (2E).

4. The foldable ladder of claim 2, wherein, Both ends of the folding connecting piece (2) are respectively connected with a first connecting pipe (2A) and a second connecting pipe (2B), the first connecting pipe (2A) is fixed in the first ladder unit (1-1), the second connecting pipe (2B) is fixed in the second ladder unit (1-2), one end of the first connecting piece (2C) is rotatably connected with the first connecting pipe (2A), the other end is slidably connected with the second connecting pipe (2B), one end of the second connecting piece (2D) is rotatably connected with the second connecting pipe (2B), the other end is slidably connected with the first connecting pipe (2A).

5. A folding ladder according to claim 4, wherein, The end of the first connecting pipe (2A) and the end of the second connecting pipe (2B) are both provided with a cover plate (5).

6. The foldable ladder of claim 1, wherein, A plurality of step plates (4) are arranged on the first ladder unit (1-1), and the bottom of the locking sleeve (3) abuts against the step plate (4) on the top of the first ladder unit (1-1) when the folding ladder is unfolded.

7. The foldable ladder of claim 1, wherein, The bottom of the first ladder unit (1-1) is provided with an anti-skid sleeve (7), and the top of the second ladder unit (1-2) is provided with a hook piece (8).

8. A folding ladder according to claim 7, wherein, The sum of the length of the first ladder unit (1-1) and the anti-skid sleeve (7) is less than the sum of the length of the second ladder unit (1-2) and the hook piece (8).

9. The foldable ladder of claim 1, wherein, The first ladder unit (1-1) is provided with a spring buckle (2J), the end of the spring buckle (2J) extends out of the first ladder unit (1-1), and the end of the spring buckle (2J) abuts against the locking sleeve (3).

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