ladder

Abstract

The present invention relates to a ladder comprising a ladder body, the ladder further comprising a positioning structure connected to the top of the ladder body, the positioning structure comprising a positioning connecting rod connected to the ladder body and a positioning leg connected to the positioning connecting rod, the positioning leg comprising a determining link connected between the positioning connecting rod and a positioning plate and a positioning plate for positioning with respect to a support. In the present invention, by providing the positioning structure, during use, the top of the ladder body is fixed at a higher position by the positioning structure, and due to the fixation at one end, the entire ladder does not move during use, preventing the ladder from slipping or falling, improving the safety during use, and being fixable to a flat surface, a curved surface, and even a right-angled surface, having high compatibility with the use environment, with a simple ladder design, easy processing and production, low cost, and very convenient fixation and removal during use.

Description

Technical Field

[0001] The present invention relates to a ladder.

Background Art

[0002] As a tool for daily life and production, ladders are widely used in fields such as construction, installation, fire protection, and households. A ladder uses two rods located on both sides as a frame, and a rail connected to the two rods in the center for climbing.

[0003] Ladders are mainly classified into straight ladders, herringbone ladders, telescopic ladders, etc. according to types. A straight ladder is the simplest ladder, with only two rods and multiple rails. A herringbone ladder is equivalent to two sets of straight ladders, presenting a "V" shape when in use. A telescopic ladder can be extended and retracted in height. Both straight ladders and herringbone ladders can also be manufactured as telescopic ladders. Straight ladders have a simple structure and a low price. Herringbone ladders are stable in use and relatively safe. After being retracted, telescopic ladders have a small volume and are easy to store. Therefore, each ladder has its own advantages and disadvantages.

[0004] Taking a straight ladder as an example, during use, the top contacts a wall or an object at a high position, and the bottom contacts the ground at a low position. Since the support is provided by the contact between the top and the bottom, it is easy to move, slip, or even fall during use, resulting in a safety risk. Therefore, when using a straight ladder, a person to support at the bottom is required to ensure the safety of use.

Summary of the Invention

[0005] An object of the present invention is to provide a ladder, and particularly to provide a ladder with a positioning structure to make the use of the ladder safer.

[0006] To achieve the above objective, one technical solution employed in the present invention is a ladder comprising a ladder body, wherein the ladder further comprises a positioning structure connected to the top of the ladder body, the positioning structure comprising a positioning connecting rod connected to the ladder body, and positioning legs connected to both ends of the positioning connecting rod, the positioning legs comprising a positioning link and a positioning plate, the positioning link being connected between the positioning connecting rod and the positioning plate, and the positioning plate being for positioning relative to a support.

[0007] In the above technical solution, preferably, the positioning link comprises a fixed rod, one end of which is fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods, one end of which is rotatably connected to the other end of the fixed rod, and the other end of which is rotatably connected to the positioning plate. The rotatable connection between the pair of rotating rods and the fixed rod adjusts the fixing angle of the positioning plate and allows it to be fixed to the support more flexibly.

[0008] More preferably, the other end of the pair of rotating rods is rotatably connected to the positioning plate.

[0009] More preferably, the other end of the fixed rod and one end of the pair of rotating rods are rotatably connected in pairs via rotating connectors, or the other end of the fixed rod and one end of the pair of rotating rods are rotatably connected via the same rotating connector. When a Y-shaped structure is formed between the fixed rod and the pair of rotating rods, the connection becomes more stable and the fixing becomes more flexible.

[0010] More preferably, a reinforcing block is provided at the connection point between the positioning connecting rod and the fixed rod. Using a triangular reinforcing block increases the connection strength between the positioning connecting rod and the fixed rod.

[0011] More preferably, the fixing rod and the positioning connecting rod are perpendicular to each other.

[0012] In the above technical solution, preferably, the positioning legs are provided in the form of one, two, or more, and if there are two positioning legs, the two positioning legs are connected to each end of the positioning connecting rod, respectively. Positioning with two positioning legs is the most stable and at the same time does not create a redundant structure.

[0013] In the above technical solution, preferably, the positioning connecting rod extends in the width direction of the ladder body. The direction of extension of the positioning connecting rod and the ladder rails coincide, so that they become more compact when connected.

[0014] In the above technical solution, the positioning plate is preferably a straight plate, a bent plate, or a curved plate. Positioning plates of different shapes can satisfy the positioning of supports of different shapes.

[0015] In the above technical solution, preferably, the positioning plate comprises a plate body to which the positioning connecting rod is connected, and a rotating plate rotatably connected to at least one end of the plate body. By adjusting the angle of the rotating plate, the rotating plate can be flexibly positioned relative to the support.

[0016] In the above technical solution, preferably, a pad is further connected to the positioning plate, and the positioning link and the pad are connected to opposite sides of the positioning plate, respectively. The pad can increase the frictional force between the positioning plate and the support.

[0017] In the above technical solution, preferably, the ladder further comprises a support structure, the support structure comprising support legs connected to both sides of the lower part of the ladder body.

[0018] More preferably, the support leg comprises a first leg and a second leg, wherein one end of the first leg is rotatably connected to the ladder body and the other end is slidably connected to the second leg, and one end of the second leg is rotatably connected to the ladder body and the other end is a support end. By changing the single-sided support of the ladder to double-sided support, the support at the bottom can be made more stable.

[0019] More preferably, the other end of the first leg is slidable in the longitudinal direction of the second leg. This allows for easy adjustment of the angle between the support leg and the ladder body.

[0020] More preferably, the support structure further comprises a support connecting rod connected between the support legs on both sides. This can improve the strength of the support provided by the ladder.

[0021] More preferably, the ladder body comprises side bars located on both sides and rails connected between the side bars on both sides, wherein a plurality of rails are provided, the plurality of rails are distributed in the longitudinal direction of the side bars, and the support legs are connected to the side bars on both sides, respectively.

[0022] In the above technical solution, preferably, the ladder body comprises side bars located on both sides and rails connected between the side bars on both sides, wherein a plurality of rails are provided, the plurality of rails are distributed in the longitudinal direction of the side bars, and the positioning connecting rods are connected to the rails.

[0023] In the above technical solution, preferably, the ladder body is a straight ladder or a telescopic ladder.

[0024] To achieve the above objective, the following are other technical solutions employed in the present invention.

[0025] A ladder comprising a ladder body having side bars located on both sides, and multiple rails connected between the side bars on both sides and distributed in the longitudinal direction of the side bars, wherein the ladder further comprises a positioning structure and a support structure.

[0026] The positioning structure is connected to the top of the ladder body and comprises a positioning connecting rod connected to the rail and positioning legs connected to both ends of the positioning connecting rod, the positioning legs comprising a positioning link and a positioning plate, the positioning link being connected between the positioning connecting rod and the positioning plate, the positioning plate being for positioning relative to a support, the positioning link comprising a fixed rod with one end fixedly connected to one end of the positioning connecting rod and a pair of rotating rods with one end rotatably connected to the other end of the fixed rod and the other end rotatably connected to the positioning plate, the positioning plate being a straight plate, a bent plate or a curved plate.

[0027] The support structure comprises support legs connected to side bars on both sides of the lower part of the ladder body, each support leg comprising a first leg, a second leg, and a support connecting rod, wherein one end of the first leg is rotatably connected to the ladder body and the other end is slidably connected to the second leg, one end of the second leg is rotatably connected to the ladder body and the other end is a support end, and the support connecting rod is connected between the support legs on both sides.

[0028] To achieve the above object, as another technical solution adopted in the present invention, there is provided a ladder comprising a ladder body having side bars located on both sides and rails connected between the side bars on both sides, distributed in the longitudinal direction of the side bars, and provided in plurality, wherein the ladder further comprises a positioning structure and a support structure. The positioning structure is connected to the top of the ladder body. The positioning structure comprises a positioning connecting rod connected to the rail, and positioning legs respectively connected to both ends of the positioning connecting rod. The positioning legs comprise a positioning link and a positioning plate. The positioning link is connected between the positioning connecting rod and the positioning plate. The positioning plate is for positioning with a support. The positioning link comprises a fixed rod having one end fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods having one end rotatably connected to the other end of the fixed rod and the other end rotatably connected to the positioning plate. The positioning plate comprises a plate body to which the positioning connecting rod is connected, and a rotating plate rotatably connected to at least one end of the plate body. The support structure comprises support legs respectively connected to the side bars on both lower sides of the ladder body. The support legs comprise a first leg, a second leg, and a support connecting rod. One end of the first leg is rotatably connected to the ladder body, and the other end is slidably connected to the second leg. One end of the second leg is rotatably connected to the ladder body, and the other end is a support end. The support connecting rod is connected between the support legs on both sides.

[0029] Another object of the present invention is to provide a positioning structure for a ladder, as an accessory of the ladder, to make the use of the ladder safer.

[0030] To achieve the above object, as a technical solution adopted in the present invention, there is a positioning structure for a ladder. The positioning structure is for connection to the top of the ladder. The positioning structure includes a positioning connecting rod connected to the ladder body and a positioning leg connected to the positioning connecting rod. The positioning leg includes a positioning link and a positioning plate. The positioning link is connected between the positioning connecting rod and the positioning plate. The positioning plate is for positioning with a support.

[0031] By applying the above technical solution, the present invention has the following advantages and effects compared with the prior art.

[0032] In the present invention, by providing a positioning structure, during use, the top of the ladder body is fixed at a higher position by the positioning structure. By fixing one end, the entire ladder does not move during use, preventing the ladder from slipping or falling, and improving the safety of use.

[0033] The positioning structure of the present invention can be fixed on a plane, a curved surface, and even a right-angle surface, and has high compatibility with the use environment.

[0034] The positioning structure of the present invention has a simple design, is easy to process and produce, has a low cost, and is very convenient for fixing and removing during use.

Brief Description of the Drawings

[0035] [Figure 1] It is a schematic perspective view of this embodiment. [Figure 2] It is a schematic configuration diagram of a positioning leg in this embodiment. [Figure 3] It is another schematic configuration diagram of a positioning leg in this embodiment. [Figure 4] It is a first schematic positioning diagram of the positioning structure in this embodiment. [Figure 5] It is a schematic enlarged view of the top in FIG. 4. [Figure 6]This is a schematic diagram of the positioning structure in this embodiment. [Figure 7] Figure 6 is a schematic enlarged view of the top. [Figure 8] This is a schematic diagram of the positioning structure in this embodiment. [Figure 9] Figure 8 is a schematic enlarged view of the top. [Figure 10] Figure 4 shows a schematic diagram of the positioning structure in this embodiment. [Figure 11] Figure 10 is a schematic enlarged view of the top. [Modes for carrying out the invention]

[0036] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings, and of course, the embodiments described are not all embodiments but some embodiments of the present invention. Any other embodiments that a person skilled in the art can obtain without creative work based on the embodiments of the present invention are all within the scope of protection of the present invention.

[0037] In the description of this invention, the orientations or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are merely for the purpose of facilitating and simplifying the description of this invention. They do not indicate or suggest that the pointed-out device or element has a specific orientation or must be constructed and operated in a specific orientation, and therefore should not be understood as limiting the invention. Furthermore, terms such as "first," "second," and "third" are for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0038] The ladder shown in Figure 1 comprises a ladder body 1, which may be a straight ladder or an extendable ladder. In both cases, the ladder body 1 comprises side bars 10 located on both sides and rails 11 connected between the side bars 10. Multiple rails 11 are provided, and the multiple rails 11 are distributed in the longitudinal direction of the side bars 10, forming step rails for climbing.

[0039] In one embodiment of the present application, the ladder further comprises a positioning structure, which is a structure for improving its safety, and the positioning structure is connected to the top of the ladder body 1, the top of which in the present application is one end that contacts a support 5 at a higher position, the support 5 being, for example, a wall or an article, with one end that contacts the ground at a lower position.

[0040] The positioning structure comprises a positioning connecting rod 20 and positioning legs 21. The positioning connecting rod 20 is connected to the ladder body 1, specifically to the rails 11 at the top of the ladder body 1, such as the first rail, second rail, etc., but it is optimal to connect it to the first rail at the top. Both the positioning connecting rod 20 and the rails 11 extend in the width direction of the ladder body 1. The positioning legs 21 are connected to the positioning connecting rod 20. There may be one, two or more positioning legs 21, but two is optimal, and they are connected to both ends of the positioning connecting rod 20, respectively, to ensure positioning stability.

[0041] In this embodiment, the positioning leg 21 comprises a positioning link 210 and a positioning plate 211, the positioning link 210 being connected between the positioning connecting rod 20 and the positioning plate 211, and the positioning plate 211 being for positioning relative to the support 5 at a higher position, the positioning being either support or fixed.

[0042] Specifically, the positioning link 210 includes a fixed rod 210a and a pair of rotating rods 210b. One end of the fixed rod 210a is fixedly connected to one end of the positioning connecting rod 20, and the fixed rod 210a and the positioning connecting rod 20 are perpendicular to each other. At the perpendicular part of the two, a reinforcing block 22 is provided to enhance the connection strength between the two. The pair of rotating rods 210b are in a "V" shape. The three points among one end of the pair of rotating rods 210b and the other end of the fixed rod 210a are rotatably connected via the same rotating connector 23. The other end of the pair of rotating rods 210b is rotatably connected to the positioning plate 211. The entire positioning link 210 is in a "Y" shape. Of course, one end of the pair of rotating rods 210b and the other end of the fixed rod 210a may be rotatably connected in two pairs respectively.

[0043] A pad 24 is further connected to the positioning plate 211. The positioning link 210 and the pad 24 are respectively connected to both opposite sides of the positioning plate 211. The pad 24 can increase the frictional force between the positioning plate 211 and the support 5.

[0044] The positioning plate 211 is set in many forms according to the difference in the shape of the support 5.

[0045] In one form, as shown in FIG. 2, the positioning plate 211 is a single flat board, and then it is positioned and fixed by a fastener 4 (for example, a combination lamp of a screw, a bolt and a nut). As shown in FIGS. 4 and 5, at this time, the positioning plate 211 is fixed to the flat support 5 by the fastener 4.

[0046] The positioning plate 211 may be changed according to the difference in the shape of the support 5. Specifically, it is as follows.

[0047] As shown in Figures 6 and 7, the positioning plate 211 is bent at a certain angle to form a bent plate, with 90° being an example in the drawing. The bent positioning plate 211 and the right-angle surface of the support 5 are bonded together and fixed to the right-angle surface by the fastener 4. Of course, the angle at which the positioning plate 211 is bent may be determined according to the shape of the outer surface of the support 5.

[0048] As shown in Figures 8 and 9, the positioning plate 211 is bent to form an arc, creating a curved plate. The arc-shaped positioning plate 211 is then attached to the curved surface of the support 5 and fixed to the curved surface by the fastener 4. Of course, the curvature of the curve can be determined according to the shape of the outer surface of the support 5.

[0049] In another configuration, as shown in Figure 3, the positioning plate 211 comprises a plate body 211a to which the other ends of a pair of rotating rods 210b are connected, and a rotating plate 211b rotatably connected to at least one end of the plate body 211a. In the drawing, the rotating plates 211b are connected to both ends of the plate body 211a, and the rotating plates 211b can rotate to form a different angle from the plate body 211a and be flexibly fixed to the support 5.

[0050] As shown in Figures 10 and 11, in this case, there is a 90° angle between the plate body 211a and the rotating plate 211b, and the two rotating plates 211b are fixed to the right-angle surfaces of the support 5 by fasteners 4. Of course, the rotation angle between the plate body 211a and the rotating plate 211b is determined according to the shape of the outer surface of the support 5, and can accommodate the positioning of different supports 5 at different angles.

[0051] In another embodiment of this application, the ladder further comprises a support structure, the support structure comprising support legs 30 connected to both sides of the lower part of the ladder body 1 (where lower part refers to the part of one end closer to the bottom of the ladder), and a support connecting rod 31 connected between the support legs 30 on both sides.

[0052] In this embodiment, the support leg 30 includes a first leg 300 and a second leg 301. One end of the first leg 300 is rotatably connected to the ladder body 1, specifically rotatably connected to the lower part of the side bar 10 of the ladder body 1. The other end is slidably connected to the second leg 301, specifically slidable in the longitudinal direction of the second leg 301. One end of the second leg 301 is rotatably connected to the ladder body 1, specifically rotatably connected to the lower part of the side bar 10 of the ladder body 1. However, the rotational connection point between it and the side bar 10 is higher than the rotational connection point between the first leg 300 and the side bar 10. The other end of the second leg 301 is a support end. The support connecting rod 31 is connected between the second legs 301 on both sides, which can improve the strength of the support by the ladder.

[0053] The support structure forms a "V" - shaped support together with the ladder body 1 during the use of the ladder, reinforcing the stability of the bottom of the ladder.

[0054] Of course, the support structure has another simplified structure, that is, the support structure does not include the first leg 300 and forms a "V" - shaped support together with the ladder body 1 only by the second leg 301.

[0055] In this embodiment, the positioning structure is detachably connected to the required ladder as a separate accessory and used together, which can improve the safety during the use of the ladder. Its structure is the same as the positioning structure in the first embodiment and will not be described repeatedly here.

[0056] The above embodiments are only for explaining the technical idea and features of the present invention. For the purpose of enabling those who know this technology to understand the content of the present invention and implement it accordingly, the protection scope of the present invention cannot be limited thereby. According to the idea of the present invention, any equivalent changes or modifications substantially made should be included in the protection scope of the present invention.

Explanation of Reference Numerals

[0057] 1 Ladder body, 10 Side bars, 11 Rails, 20 Positioning connecting rods, 21 Positioning legs, 210 Positioning links, 210a Fixed rods, 210b Rotating rods, 211 Positioning plates, 211a Plate body, 211b Rotating plate, 22 Reinforcement blocks, 23 Rotating connectors, 24 Pads, 30 Support legs, 300 First leg, 301 Second leg, 31 Support connecting rods, 4 Fasteners, 5 Supports

Claims

1. A ladder that includes a ladder body, The ladder further comprises a positioning structure connected to the top of the ladder body, the positioning structure comprising a positioning connecting rod connected to the ladder body, and a positioning leg connected to the positioning connecting rod, The positioning leg comprises a positioning link and a positioning plate, the positioning link being connected between the positioning connecting rod and the positioning plate, and the positioning plate being for positioning relative to the support. The positioning link is characterized by comprising a fixed rod, one end of which is fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods, one end of which is rotatably connected to the other end of the fixed rod, and the other end of which is connected to the positioning plate.

2. The ladder according to claim 1, characterized in that the other end of the pair of rotating rods is rotatably connected to the positioning plate.

3. The ladder according to claim 1, characterized in that the other end of the fixed rod and one end of the pair of rotating rods are each rotatably connected in pairs via rotating connectors, or the other end of the fixed rod and one end of the pair of rotating rods are rotatably connected via the same rotating connector.

4. The ladder according to claim 1, characterized in that a reinforcing block is provided at the connection point between the positioning connecting rod and the fixing rod.

5. The ladder according to claim 1, characterized in that the fixing rod and the positioning connecting rod are perpendicular to each other.

6. The ladder according to claim 1, wherein one, two or more positioning legs are provided, and if two positioning legs are provided, the two positioning legs are connected to both ends of the positioning connecting rod, respectively.

7. The ladder according to claim 1, characterized in that the positioning connecting rod extends in the width direction of the ladder body.

8. The ladder according to claim 1, characterized in that the positioning plate is a straight plate, a bent plate, or a curved plate.

9. The ladder according to claim 1, characterized in that the positioning plate comprises a plate body to which the pair of rotating rods are connected, and a rotating plate rotatably connected to at least one end of the plate body.

10. The ladder according to claim 1, wherein a pad is further connected to the positioning plate, and the positioning link and pad are connected to opposite sides of the positioning plate, respectively.

11. The ladder according to claim 1, wherein the ladder further comprises a support structure, the support structure comprising support legs connected to both sides of the lower part of the ladder body.

12. The ladder according to claim 11, wherein the support leg comprises a first leg and a second leg, the first leg having one end rotatably connected to the ladder body and the other end slidably connected to the second leg, and the second leg having one end rotatably connected to the ladder body and the other end being a support end.

13. The ladder according to claim 12, characterized in that the other end of the first leg is slidable in the longitudinal direction of the second leg.

14. The ladder according to claim 11, wherein the support structure further comprises a support connecting rod connected between the support legs on both sides.

15. The ladder according to claim 11, wherein the ladder body comprises side bars located on both sides and rails connected between the side bars on both sides, wherein a plurality of rails are provided, the plurality of rails are distributed in the longitudinal direction of the side bars, and the support legs are connected to the side bars on both sides, respectively.

16. The ladder according to claim 1, wherein the ladder body comprises side bars located on both sides and rails connected between the side bars on both sides, a plurality of rails are provided, the plurality of rails are distributed in the longitudinal direction of the side bars, and the positioning connecting rod is connected to the rails.

17. The ladder according to claim 1, characterized in that the ladder body is a straight ladder or a telescopic ladder.

18. A ladder comprising a ladder body having side bars located on both sides, and multiple rails connected between the side bars on both sides, distributed in the longitudinal direction of the side bars, and provided therein, The aforementioned ladder further comprises a positioning structure and a support structure, The positioning structure is connected to the top of the ladder body, and comprises a positioning connecting rod connected to the rail, and positioning legs connected to both ends of the positioning connecting rod, the positioning legs comprising a positioning link and a positioning plate, the positioning link being connected between the positioning connecting rod and the positioning plate, the positioning plate being for positioning with respect to a support, the positioning link comprising a fixed rod with one end fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods with one end rotatably connected to the other end of the fixed rod and the other end rotatably connected to the positioning plate, the positioning plate being a straight plate, a bent plate or a curved plate, The support structure comprises support legs connected to side bars on both sides of the lower part of the ladder body, each support leg comprising a first leg, a second leg, and a support connecting rod, wherein one end of the first leg is rotatably connected to the ladder body and the other end is slidably connected to the second leg, one end of the second leg is rotatably connected to the ladder body and the other end is a support end, and the support connecting rod is connected between the support legs on both sides.

19. A ladder comprising a ladder body having side bars located on both sides, and multiple rails connected between the side bars on both sides, distributed in the longitudinal direction of the side bars, and provided therein, The aforementioned ladder further comprises a positioning structure and a support structure, The positioning structure is connected to the top of the ladder body, and the positioning structure comprises a positioning connecting rod connected to the rail, and positioning legs connected to both ends of the positioning connecting rod, the positioning legs comprises a positioning link and a positioning plate, the positioning link is connected between the positioning connecting rod and the positioning plate, the positioning plate is for positioning with a support, the positioning link comprises a fixed rod with one end fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods with one end rotatably connected to the other end of the fixed rod and the other end rotatably connected to the positioning plate, the positioning plate comprises a plate body to which the pair of rotating rods are connected, and a rotating plate rotatably connected to at least one end of the plate body, The support structure comprises support legs connected to side bars on both sides of the lower part of the ladder body, the support legs comprising a first leg, a second leg, and a support connecting rod, wherein one end of the first leg is rotatably connected to the ladder body and the other end is slidably connected to the second leg, one end of the second leg is rotatably connected to the ladder body and the other end is a support end, and the support connecting rod is connected between the support legs on both sides.

20. A positioning structure for ladders, The positioning structure is for connection to the top of the ladder, and comprises a positioning connecting rod connected to the ladder body, and a positioning leg connected to the positioning connecting rod, the positioning leg comprising a positioning link and a positioning plate, the positioning link connected between the positioning connecting rod and the positioning plate, and the positioning plate for positioning relative to the support. The positioning link is characterized by comprising a fixed rod, one end of which is fixedly connected to one end of the positioning connecting rod, and a pair of rotating rods, one end of which is rotatably connected to the other end of the fixed rod, and the other end of which is connected to the positioning plate, in a positioning structure for a ladder.

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