Simple ladder

Abstract

The present invention belongs to the technical field of climbing tools, and provides a simple ladder. The simple ladder includes a hook and a frame, the hook is connected to the upper end of the frame, and the frame includes a first frame rod for supporting a load and a second frame rod that can move along the axial direction of the first frame rod; the upper end of the second frame rod is connected to the hook, and the lower end of the second frame rod is sleeved on the first frame rod. After the hook is hooked on the horizontal branch, when the horizontal branch swings up and down under the action of force, the second frame rod can be extended and retracted along the axial direction of the first frame rod under the action of gravity or the driving action of the horizontal branch to achieve buffering, and the hook follows the horizontal branch, so that the hook is not easy to be unhooked and slide off from the horizontal branch, reducing the risk of falling to the ladder climber, and effectively increasing the safety of the ladder climber.

Description

Technical Field

[0001] The invention belongs to the technical field of climbing tools, and in particular relates to a simple ladder. Background Art

[0002] At present, the existing ladders are usually used to climb trees by leaning against the main trunk, but when used to lean against the horizontally extending branches, a hook structure is set at the top of the tree ladder and sleeved on the horizontal branches, the upper end of the tree ladder is leaned against the horizontal branches, and the bottom of the tree ladder is supported on the ground for climbing trees. However, when the branches swing up and down due to the influence of strong winds, since the length of the ladder is fixed and cannot be adjusted, and the ladder is supported on the ground to form a hard support, the top of the ladder is likely to slip or be unhooked from the branches during the climbing process, which may easily cause the ladder to slide, causing danger to the climbers, and safety cannot be guaranteed. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a simple ladder, aiming to solve the problem that the ladder in the prior art relies on horizontal branches and is easy to get unhooked and slide when the horizontal branches swing up and down, causing safety hazards to the ladder climbers.

[0004] An embodiment of the present invention is implemented as follows: a simple ladder is provided, which includes a hook and a frame for people to climb, wherein the hook is connected to the upper end of the frame; the frame includes a first frame rod for supporting a load and a second frame rod that can move along the axial direction of the first frame rod; the upper end of the second frame rod is connected to the hook, and the lower end of the second frame rod is sleeved on the first frame rod.

[0005] Furthermore, the second frame rod includes a climbing rod and a guide rod, the upper end of the climbing rod is detachably connected to the lower end of the hook, the lower end of the climbing rod is detachably connected to the upper end of the guide rod, and the guide rod is sleeved in the first frame rod.

[0006] Furthermore, the upper end of the climbing pole is threadedly connected to the lower end of the hook, the inner wall of the lower end of the climbing pole is provided with an internal thread, the upper end of the guide rod is provided with an external thread, and the upper end of the guide rod is placed in the climbing pole through a threaded connection sleeve.

[0007] Furthermore, the climbing pole comprises a pole body and a plurality of footrest structures, wherein the plurality of footrest structures are installed on the pole body at intervals from each other;

[0008] The pedal structure comprises a fixed part, a movable part, a first connecting rod and a second connecting rod; the fixed part is fixedly mounted on the rod body, the movable part is movably sleeved on the rod body along the axial direction of the rod body, one end of the first connecting rod is hinged to the fixed part, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the movable part;

[0009] A limiting member is arranged on the rod body, and when the second connecting rod is at a position perpendicular to the rod body, the bottom end of the movable member abuts against the limiting member.

[0010] Furthermore, the cross section of the portion of the guide rod sleeved in the first frame rod is in the shape of a straight line, a guide hole extending along the axial direction of the first frame rod is opened in the first frame rod, the cross section of the guide hole is in the shape of a straight line, and the guide rod is inserted into the guide hole.

[0011] Furthermore, the first rack rod includes a detachably connected support member and a receiving member, the upper end of the support member is connected to the lower end of the receiving member, the guide hole is opened in the receiving member, and the guide hole penetrates the receiving member along the axial direction of the receiving member.

[0012] Furthermore, an internal thread is provided at the middle of the upper end of the support member, an external thread is provided at the side wall of the lower end of the receiving member, and the lower end of the receiving member is inserted into the middle of the upper end of the support member through a threaded connection.

[0013] Furthermore, the receiving member comprises a receiving rod and a plurality of pedal structures, and the plurality of pedal structures are installed on the receiving rod at intervals from each other;

[0014] The pedal structure comprises a fixed part, a movable part, a first connecting rod and a second connecting rod; the fixed part is fixedly mounted on the receiving rod, the movable part is movably sleeved on the receiving rod along the axial direction of the receiving rod, one end of the first connecting rod is hinged to the fixed part, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the movable part;

[0015] A limiting member is arranged on the receiving rod, and when the second connecting rod is in a position perpendicular to the receiving rod, the bottom end of the movable member abuts against the receiving rod.

[0016] Furthermore, foot pedals are arranged on opposite sides of the upper end of the support member, and the cross section of the lower end of the support member is a three-leaf structure, the three-leaf structure is composed of three leaves, and the angle between the center lines of each leaf is 120°.

[0017] Furthermore, the inner side of the hook is provided with latching teeth, and the outer side of the hook is provided with annular parts at two opposite ends.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the present invention supports the first frame rod on a load-bearing object, connects the upper end of the second frame rod with a hook, and movably sleeves the lower end of the second frame rod on the first frame rod along the axial direction of the first frame rod. After the hook is hooked on the transverse branch, when the transverse branch swings up and down under the action of force, the second frame rod can be extended and retracted along the axial direction of the first frame rod under the action of gravity or the driving action of the transverse branch to achieve buffering. The hook follows the movement of the transverse branch, so that the hook is not easy to be unhooked and slide off the transverse branch, thereby reducing the risk of falling to the ladder climber and effectively increasing the safety of the ladder climber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a simple ladder according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the decomposition structure;

[0021] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of region A;

[0022] Figure 4 yes Figure 2 BB direction cross-sectional structure schematic diagram;

[0023] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure in the CC direction;

[0024] Figure 6 yes Figure 2 Schematic diagram of the DD direction cross-sectional structure. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 and Figure 2 As shown, a simple ladder provided by an embodiment of the present invention is shown. The simple ladder comprises a hook 1 for hanging on a horizontal object (such as a horizontal branch on a tree) and a frame for people to climb, the hook 1 is connected to the upper end of the frame, and the lower end of the frame is used to support a load (such as the ground). Specifically, the frame comprises a first frame rod 2 for supporting the load and a second frame rod 3 that can move along the axial direction of the first frame rod 2, wherein the upper end of the second frame rod 3 is detachably connected to the hook 1, and the lower end of the second frame rod 3 is sleeved on the first frame rod 2 and can be detached from the first frame rod 2.

[0028] In the above embodiment, the second rack 3 includes a climbing rod 31 and a guide rod 32. The upper end of the climbing rod 31 is detachably connected to the lower end of the hook 1 through a thread. Specifically, the upper end of the climbing rod 31 is provided with an external thread, and the inner wall of the lower end of the hook 1 is provided with an internal thread. The climbing rod 31 and the hook 1 are connected by the internal and external threads. The lower end of the climbing rod 31 is also detachably connected to the upper end of the guide rod 32 through a thread. Specifically, the inner wall of the lower end of the climbing rod 31 is provided with an internal thread, and the upper end of the guide rod 32 is provided with an external thread. The upper end of the guide rod 32 is connected and sleeved in the climbing rod 31 through a threaded connection. In order to meet the height requirement, multiple climbing rods 31 can be connected to each other through a threaded connection, and then the guide rod 32 can be sleeved in the lowest climbing rod 31. The guide rod 32, except for the part connected to the climbing rod 31, can be sleeved in the first rack 2, and the guide rod 32 can be telescopic in the first rack 2.

[0029] In the above embodiments, please refer to Figure 3As shown, the climbing pole 31 includes a pole body 311 and a plurality of footrest structures, and the plurality of footrest structures are installed on the pole body 311 at intervals from each other. The pedal structure includes a fixed part 312, a movable part 313, a first connecting rod 314 and a second connecting rod 315, wherein the fixed part 312 is fixedly installed on the rod body 311 by a locking part, and the movable part 313 is movably sleeved on the rod body 311 along the axial direction of the rod body 311, one end of the first connecting rod 314 is hinged on the fixed part 312, the other end of the first connecting rod 314 is hinged to one end of the second connecting rod 315, and the other end of the second connecting rod 315 is hinged to the movable part 313, and a limiting part 316 is provided on the rod body 311. When the second connecting rod 315 is in a position perpendicular to the rod body 311, the bottom end of the movable part 313 abuts against the limiting part 316 to limit the movable part 313 downward, so that the ladder climber can step on the second connecting rod 315 to climb the ladder. By moving the movable member 313 on the rod body 311, the movable member 313 drives the first connecting rod 314 and the second connecting rod 315 to be straightened or unfolded. When the first connecting rod 314 and the second connecting rod 315 are stretched to form a straight line, the distance between the two fixing members 312 installed on the rod body 311 is greater than the total length when the first connecting rod 314 and the second connecting rod 315 are stretched to form a straight line, so that when the simple ladder is not used, the movable member 313 is moved to make the footrest structure in a straight line, which is convenient for storage, placement, packaging and transportation. When the simple ladder is used, the rod body 311 is placed vertically, and under the action of gravity, the movable member of the footrest structure can slide downward to abut against the limit member 316, and at this time, the second connecting rod 315 and the rod body 311 are in a vertical state, so that the footrest structure can be used quickly and conveniently for climbing the ladder. In order to enable the movable part 313 to move under the action of gravity, the movable part 313 is preferably a linear bearing, and the rod body is a cylindrical rod body, and the linear bearing is sleeved on the cylindrical rod body.

[0030] In the above embodiments, please refer to Figure 4 and Figure 5 As shown, the cross section of the portion of the guide rod 32 sleeved in the first frame rod 2 is in the shape of a straight line, and a guide hole 20 extending in the axial direction of the first frame rod 2 is provided in the first frame rod 2. The cross section of the guide hole 20 is in the shape of a straight line, and the guide rod 32 is inserted into the guide hole 20, so that the guide rod 32 can only move in the axial direction of the first frame rod 2, but cannot rotate in the circumferential direction of the first frame rod 2, thereby enhancing the safety and stability of the ladder climber. In other embodiments, the cross section of the portion of the guide rod 32 sleeved in the first frame rod 2 is in the shape of a cross, and the cross section of the guide hole 20 is in the shape of a cross, as long as the guide rod 32 can only move in the axial direction of the first frame rod 2, but cannot rotate in the circumferential direction of the first frame rod 2.

[0031] In the above embodiment, the first rack rod 2 includes a detachably connected support member 21 and a receiving member 22, the upper end of the support member 21 is connected to the lower end of the receiving member 22, specifically, an internal thread is provided in the middle of the upper end of the support member 21, and an external thread is provided on the side wall of the lower end of the receiving member 22, and the lower end of the receiving member 22 is inserted into the middle of the upper end of the support member 21 by a threaded connection. The above-mentioned guide hole 20 is opened in the receiving member 22 along the axial direction of the receiving member 22, and the guide hole 20 penetrates the receiving member 22 along the axial direction of the receiving member 22, so as to ensure that the moving distance of the guide rod in the guide hole 20 meets the requirements and can reduce the weight of the receiving member 22.

[0032] The above-mentioned receiving member 22 includes a receiving rod 221 and a plurality of pedal structures, and the plurality of pedal structures are installed on the receiving rod 221 at intervals. The pedal structure includes a fixed member 312, a movable member 313, a first connecting rod 314 and a second connecting rod 315; the fixed member 312 is fixedly installed on the receiving rod 221, and the movable member 313 is movably sleeved on the receiving rod 221 along the axial direction of the receiving rod, one end of the first connecting rod 314 is hinged on the fixed member 312, the other end of the first connecting rod 314 is hinged to one end of the second connecting rod 315, and the other end of the second connecting rod 315 is hinged to the movable member 313. A limiting member 222 is provided on the receiving rod 221, and when the second connecting rod 315 is in a position perpendicular to the receiving rod 221, the bottom end of the movable member 313 abuts against the receiving rod 221. The pedal structure installed on the receiving rod 221 is the same as the pedal structure installed on the rod body 311, and its function is also the same, which will not be repeated here.

[0033] In the above embodiment, foot pedals 211 are provided on opposite sides of the upper end of the support member 21 to facilitate applying force to the support member 21. Figure 6 As shown, the cross section of the lower end of the support member 21 is a three-leaf structure, which is composed of three leaves 212. The angle between the center lines 200 of each leaf 212 is 120°. The bottom end of the support member 21 supported on the ground is a tip. The foot pedal 211 is applied with force to make the bottom end of the support member 21 inserted into the soil, and the three-leaf structure at the lower end can effectively prevent the support member 21 from rotating, thereby ensuring the stability of the support. A through hole 210 is provided on the foot pedal 211. By passing a rope through the through hole 210 and tying it to the horizontal branch or other fixed object on which the hook 1 is hung, the support stability of the support member 21 is further ensured. A latch 11 is provided on the inner side of the hook 1. The latch 11 is used to be stuck in the branch to ensure the stability of the hook 1 hanging on the horizontal branch. Rings 12 are fixed on the opposite ends of the outer side of the hook 1. By wrapping the rope around the horizontal branch and tying it to the ring 12, the stability of the hook 1 hanging on the horizontal branch is further enhanced.

[0034] In summary, the present invention supports the first frame rod 2 on the load, connects the upper end of the second frame rod 3 with the hook 1, and movably sleeves the lower end of the second frame rod 3 on the first frame rod 2 along the axial direction of the first frame rod 2. After the hook 1 is hooked on the transverse branch, when the transverse branch swings up and down under the action of force, the second frame rod 3 can be extended and retracted along the axial direction of the first frame rod 2 under the action of gravity or the driving action of the transverse branch to achieve buffering. The hook 1 follows the transverse branch, so that the hook 1 is not easy to be unhooked and slide off the transverse branch, reducing the risk of falling to the ladder climber, and effectively increasing the safety of the ladder climber. In addition, each component of the simple ladder of the present invention can be detachably connected, which is convenient for disassembly and storage. The structure of the support member 21 can enhance the stability of the support member 21 inserted into the soil. The contraction and expansion of the footrest structure facilitates the storage, placement and quick use of the climbing rod 31 and the receiving member 22.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simple ladder, comprising a hook and a frame for people to climb, wherein the hook is connected to the upper end of the frame; characterized in that: The frame body includes a first frame rod for supporting a load and a second frame rod movable along the axial direction of the first frame rod; the upper end of the second frame rod is connected to the hook, and the lower end of the second frame rod is sleeved on the first frame rod. The second frame rod comprises a climbing rod and a guide rod, the upper end of the climbing rod is detachably connected to the lower end of the hook, the lower end of the climbing rod is detachably connected to the upper end of the guide rod, and the guide rod is sleeved in the first frame rod. The cross section of the portion of the guide rod sleeved in the first frame rod is in the shape of a straight line. A guide hole extending along the axial direction of the first frame rod is provided in the first frame rod. The cross section of the guide hole is in the shape of a straight line. The guide rod is inserted into the guide hole. The first rack rod comprises a detachably connected support member and a receiving member, the upper end of the support member is connected to the lower end of the receiving member, the guide hole is opened in the receiving member, and the guide hole penetrates the receiving member along the axial direction of the receiving member. The first frame rod is supported on a load-bearing object, the upper end of the second frame rod is connected to a hook, and the lower end of the second frame rod is movably mounted on the first frame rod along the axial direction of the first frame rod. After the hook is hooked on a transverse branch, when the transverse branch swings up and down under the action of force, the second frame rod can be extended and retracted along the axial direction of the first frame rod under the action of gravity or the driving action of the transverse branch to achieve buffering.

2. The simple ladder according to claim 1, characterized in that: The upper end of the climbing rod is threadedly connected to the lower end of the hook, the inner wall of the lower end of the climbing rod is provided with an internal thread, the upper end of the guide rod is provided with an external thread, and the upper end of the guide rod is placed in the climbing rod through a threaded connection sleeve.

3. The simple ladder according to claim 1, characterized in that: The climbing pole comprises a pole body and a plurality of footrest structures, wherein the plurality of footrest structures are installed on the pole body at intervals; The pedal structure comprises a fixed part, a movable part, a first connecting rod and a second connecting rod; the fixed part is fixedly mounted on the rod body, the movable part is movably sleeved on the rod body along the axial direction of the rod body, one end of the first connecting rod is hinged to the fixed part, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the movable part; A limiting member is arranged on the rod body, and when the second connecting rod is at a position perpendicular to the rod body, the bottom end of the movable member abuts against the limiting member.

4. The simple ladder according to claim 1, characterized in that: An internal thread is arranged at the middle of the upper end of the support member, an external thread is arranged at the side wall of the lower end of the receiving member, and the lower end of the receiving member is inserted into the middle of the upper end of the support member through a threaded connection.

5. The simple ladder according to claim 1, characterized in that: The receiving member comprises a receiving rod and a plurality of pedal structures, wherein the plurality of pedal structures are installed on the receiving rod at intervals from each other; The pedal structure comprises a fixed part, a movable part, a first connecting rod and a second connecting rod; the fixed part is fixedly mounted on the receiving rod, the movable part is movably sleeved on the receiving rod along the axial direction of the receiving rod, one end of the first connecting rod is hinged to the fixed part, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the movable part; A limiting member is arranged on the receiving rod, and when the second connecting rod is in a position perpendicular to the receiving rod, the bottom end of the movable member abuts against the limiting member.

6. The simple ladder according to claim 1, characterized in that: Foot pedals are arranged on opposite sides of the upper end of the support member, and the cross section of the lower end of the support member is a three-leaf structure, which is composed of three leaves, and the angle between the center lines of each leaf is 120°.

7. The simple ladder according to claim 1, characterized in that: The inner side of the hook is provided with latch teeth, and the opposite ends of the outer side of the hook are both fixed with ring parts.

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