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 has two bars located on both sides as a frame, and a rail for climbing is connected to the two bars in the center.

[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 bars and a plurality of 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. A straight ladder has a simple structure and a low price. A herringbone ladder has stable use and is relatively safe. After a telescopic ladder is retracted, its volume is small and it is easy to store. Therefore, each ladder has its own advantages and disadvantages.

[0004] Taking a straight ladder as an example, when in 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 is required to support it at the bottom to ensure the safety of use.

Summary of the Invention

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

[0006] In order to achieve the above object, as a technical solution adopted in the present invention, there is provided a ladder including a ladder body, wherein the ladder further includes a positioning structure connected to the top of the ladder body, and the positioning structure includes a positioning connecting rod connected to the ladder body and positioning legs respectively connected to both ends of the positioning connecting rod. The positioning legs include a positioning link and a positioning plate. The positioning link is connected between the positioning connecting rod and the positioning plate, and the positioning plate is for positioning with a support.

[0007] In the above technical solution, preferably, the positioning link includes 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 respectively and the other end rotatably connected to the positioning plate. The rotatable connection between the pair of rotating rods and the fixed rod adjusts the fixed angle of the positioning plate and enables a more flexible fixation with the support.

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

[0009] Even more preferably, the other end of the fixed rod and one end of the pair of rotating rods are rotatably connected in pairs via a rotating connector, 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 is stable and the fixation is more flexible at the same time.

[0010] Even more preferably, a reinforcing block is provided at the connection position between the positioning connecting rod and the fixed rod. Using a triangular reinforcing block can enhance the connection strength between the positioning connecting rod and the fixed rod.

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

[0012] In the above technical solution, preferably, one, two or more positioning legs are provided. When two positioning legs are provided, the two positioning legs are respectively connected to both ends of the positioning connecting rod. The positioning of the two positioning legs is the most stable and does not generate a redundant structure at the same time.

[0013] In the above technical solution, preferably, the positioning connecting rod extends in the width direction of the ladder body. The extending direction of the positioning connecting rod is the same as that of the ladder rail, so it becomes more compact when the two are connected.

[0014] In the above technical solution, preferably, the positioning plate is a straight plate, a bent plate or a curved plate. Different-shaped positioning plates can meet the positioning of different-shaped supports.

[0015] In the above technical solution, preferably, the positioning plate includes 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 with respect 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 respectively connected to opposite sides of the positioning plate. The pad can increase the frictional force between the positioning plate and the support.

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

[0018] More preferably, the support leg includes a first leg and a second leg. 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 single-side support of the ladder can be changed to double-side support, making the bottom support more stable.

[0019] More preferably, the other end of the first leg is slidable in the longitudinal direction of the second leg. The angle between the support leg and the ladder body can be easily adjusted.

[0020] More preferably, the support structure further includes a support connecting rod connected between the support legs on both sides. The strength of the support by the ladder can be improved.

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

[0022] In the above technical solution, preferably, the ladder body includes side bars located on both sides and rails connected between the side bars on both sides. A plurality of the rails are provided, and the plurality of rails are distributed in the longitudinal direction of the side bars. The positioning connecting rod is connected to the rail.

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

[0024] To achieve the above object, another technical solution adopted in the present invention is as follows.

[0025] A ladder comprising a ladder body having side bars located on both sides and a plurality of 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. 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 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 is a straight plate, a bent plate or a curved plate.

[0027] 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.

[0028] To achieve the above object, another technical solution adopted in the present invention is a ladder comprising a side bar located on both sides, and a plurality of rails connected between the side bars on both sides and distributed in the longitudinal direction of the side bar. 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 leg 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 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 leg comprises 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 provided 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, and 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-angled 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]

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Embodiments for Carrying out the Invention

[0036] Hereinafter, with reference to the drawings, the technical solution of the present invention will be clearly and completely described. Of course, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention.

[0037] In the description of the present invention, the directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are the directions or positional relationships based on those shown in the accompanying drawings, and are only for facilitating and simplifying the description of the present invention, and do not indicate or imply that the indicated device or element must have a specific direction and be constructed and operated in a specific direction, so it cannot be understood as limiting the present invention. Furthermore, terms such as "first", "second", "third", etc. are for the purpose of description only and cannot be understood as indicating or implying relative importance.

[0038] The ladder shown in Fig. 1 includes a ladder body 1, and the ladder body 1 may be a straight ladder or a telescopic ladder. Whether it is a straight ladder or a telescopic ladder, the ladder body 1 includes side bars 10 located on both sides thereof and rails 11 connected between the side bars 10 on both sides. A plurality of rails 11 are provided, and the plurality of rails 11 are distributed in the longitudinal direction of the side bar 10 to form stepping rails for climbing.

[0039] In an embodiment of the present application, the ladder further includes a positioning structure, which is a structure for improving its safety. The positioning structure is connected to the top of the ladder body 1. In the present application, the top is one end that contacts the support 5 at a high position, and the support 5 is, for example, a wall or an article, and one end whose bottom contacts the ground at a low position.

[0040] The positioning structure includes a positioning connecting rod 20 and positioning legs 21. The positioning connecting rod 20 is connected to the ladder body 1. Specifically, it is connected to the rails 11 at the top of the ladder body 1, such as the first rail, the second rail, etc. at the top, but it is most preferably connected to the first rail at the top. Both the positioning connecting rod 20 and the rail 11 extend in the width direction of the ladder body 1. The positioning legs 21 are connected to the positioning connecting rod 20. One, two, or more positioning legs 21 may be provided, but two are most optimal. They are respectively connected to both ends of the positioning connecting rod 20, and the stability of the positioning can be ensured.

[0041] In this embodiment, the positioning leg 21 includes a positioning link 210 and a positioning plate 211. The positioning link 210 is connected between the positioning connecting rod 20 and the positioning plate 211. The positioning plate 211 is for positioning with respect to the support 5 at a high position. The positioning may be support or fixation, etc.

[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 vertical, and a reinforcement block 22 is provided at the vertical point of the two to increase the connection strength between the two, the pair of rotating rods 210b are in a "human" shape, one end of the pair of rotating rods 210b and the other end of the fixed rod 210a are rotatably connected through the same rotating connector 23, and the other end of the pair of rotating rods 210b is rotatably connected to the positioning plate 211, and the whole 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 two by two.

[0043] The positioning plate 211 is further connected with a pad 24 , and the positioning link 210 and the pad 24 are respectively connected with opposite sides of the positioning plate 211 , and the pad 24 can increase the friction force between the positioning plate 211 and the support 5 .

[0044] The positioning plate 211 may be configured in various ways in accordance with the different shapes of the support 5 .

[0045] In one form, as shown in FIG. 2, the positioning plate 211 is a straight board that is then positioned and secured by fasteners 4 (e.g., a combination ramp of screws, bolts and nuts), and as shown in FIGS. 4 and 5, the positioning plate 211 is then secured to a flat support 5 by the fasteners 4.

[0046] The positioning plate 211 may be changed in accordance with the difference in shape of the support 5. Specifically, the change is as follows.

[0047] As shown in FIGS. 6 and 7, at this time, the positioning plate 211 is bent at a certain angle to form a bent plate. Taking 90° as an example in the drawing, the bent positioning plate 211 is attached to the right-angled surface of the support 5 and fixed to the right-angled 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 FIGS. 8 and 9, at this time, the positioning plate 211 is bent to draw an arc to form a curved plate. The arcuate positioning plate 211 is 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 form, as shown in FIG. 3, the positioning plate 211 includes 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, rotating plates 211b are respectively connected to both ends of the plate body 211a, and the rotating plates 211b form different angles with the plate body 211a by rotation and can be flexibly fixed to the support 5.

[0050] As shown in FIGS. 10 and 11, at this time, a 90° angle is formed between the plate body 211a and the rotating plate 211b, and the two rotating plates 211b are respectively fixed to the right-angled surface of the support 5 by the fastener 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 satisfy the positioning at different angles of different supports 5.

[0051] In another embodiment of the present application, the ladder further includes a support structure. The support structure includes support legs 30 connected to both sides of the lower part of the ladder body 1 (here, the 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, and the support strength of the ladder can be improved.

[0053] The support structure forms a "V" - shaped support together with the ladder body 1 during the use of the ladder, and reinforces 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 only the second leg 301 forms a "V" - shaped support together with the ladder body 1.

[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 of 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 is a ladder body, 10 is a side bar, 11 is a rail, 20 is a positioning connecting rod, 21 is a positioning leg, 210 is a positioning link, 210a is a fixed rod, 210b is a rotating rod, 211 is a positioning plate, 211a is a plate body, 211b is a rotating plate, 22 is a reinforcing block, 23 is a rotating connector, 24 is a pad, 30 is a support leg, 300 is a first leg, 301 is a second leg, 31 is a support connecting rod, 4 is a fastener, 5 is a support

Claims

1. 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 a positioning leg connected to the positioning connecting rod, the positioning leg 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 with a support.

2. The ladder according to claim 1, wherein 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 connected to the positioning plate.

3. The ladder according to claim 2, wherein the other ends of the pair of rotating rods are rotatably connected to the positioning plate.

4. The ladder according to claim 2, wherein the other end of the fixed rod and one ends of the pair of rotating rods are each rotatably connected in twos via a rotating connector, or the other end of the fixed rod and one ends of the pair of rotating rods are rotatably connected via the same rotating connector.

5. The ladder according to claim 2, wherein a reinforcing block is provided at the connection location between the positioning connecting rod and the fixed rod.

6. The ladder according to claim 2, wherein the fixed rod and the positioning connecting rod are perpendicular.

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

8. The ladder according to claim 1, wherein the positioning connecting rod extends in the width direction of the ladder body.

9. The ladder according to claim 1, wherein the positioning plate is a straight plate, a bent plate or a curved plate.

10. The positioning plate includes 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 ladder according to claim 1 is characterized by this.

11. A pad is further connected to the positioning plate, and the positioning link and the pad are respectively connected to opposite sides of the positioning plate. The ladder according to claim 1 is characterized by this.

12. The ladder further includes a support structure, and the support structure includes support legs respectively connected to both sides of the lower part of the ladder body. The ladder according to claim 1 is characterized by this.

13. The support leg includes a first leg and a second leg. 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 ladder according to claim 12 is characterized by this.

14. The other end of the first leg is slidable in the longitudinal direction of the second leg. The ladder according to claim 13 is characterized by this.

15. The support structure further includes a support connecting rod connected between the support legs on both sides. The ladder according to claim 12 is characterized by this.

16. The ladder body includes side bars located on both sides and rails connected between the side bars on both sides. A plurality of the rails are provided, and the plurality of rails are distributed in the longitudinal direction of the side bars. The support legs are respectively connected to the side bars on both sides. The ladder according to claim 12 is characterized by this.

17. The ladder body includes side bars located on both sides and rails connected between the side bars on both sides. A plurality of the rails are provided, and the plurality of rails are distributed in the longitudinal direction of the side bars. The positioning connecting rod is connected to the rail. The ladder according to claim 1 is characterized by this.

18. The ladder body is a straight ladder or a telescopic ladder. The ladder according to claim 1 is characterized by this.

19. A ladder comprising a ladder body including side bars located on both sides and rails connected between the side bars on both sides, the rails being provided in plurality and distributed in the longitudinal direction of the side bars 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 the 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 is a straight plate, a bent plate or a curved plate. 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. The ladder is characterized in that.

20. A ladder comprising a ladder body with 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. 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 includes a positioning connecting rod connected to the rail, and positioning legs respectively connected to both ends of the positioning connecting rod. The positioning legs include 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 the support. The positioning link includes 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 includes 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 includes support legs respectively connected to the side bars on both lower sides of the ladder body. The support legs include 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. The ladder is characterized in that.

21. A positioning structure for a ladder, The positioning structure is for being connected 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 the support. The positioning structure for a ladder is characterized in that.

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