Portable climbing ladder

Abstract

The utility model relates to a climbing ladder, in particular to a portable climbing ladder. Comprising a first ladder assembly, a second ladder assembly, a third ladder assembly, a fourth ladder assembly and the like, a second ladder assembly is hinged to the first ladder assembly, a third ladder assembly is hinged to the other end of the second ladder assembly, a fourth ladder assembly is hinged to the other end of the third ladder assembly, and the first ladder assembly and the fourth ladder assembly are symmetrically arranged. Compared with the prior art, the climbing ladder is arranged to be of a structure capable of being rotatably folded, the folded ladder is small in size and length during carrying, and the ladder is made of alloy, light in weight, portable to carry, convenient to fold and unfold, high in flexibility and capable of meeting the requirement for outdoor use.

Description

Technical Field

[0001] The utility model relates to a climbing ladder, in particular to a portable climbing ladder. Background Art

[0002] There are various types of climbing ladders, such as conventional ladders, mobile climbing ladders, extension ladders, step ladders, etc. When in use, the appropriate ladder is selected according to the actual required use.

[0003] When workers need to use a ladder for auxiliary operations in outdoor mountainous areas, before use, affected by the terrain, it is usually impossible to transport the ladder with the help of machinery, and workers need to manually transport and place it. Extension ladders usually have the defect of limited load-bearing capacity. Traditional fixed ladders usually have a certain length and volume, and a certain mass. In dense areas such as jungles and shrubs, especially when a single worker is carrying out the transportation, the overly long or large ladder will hinder the progress of the worker, is often not flexible enough, cannot be portably transported, is difficult to meet the on-site requirements, and will cause a relatively large load on the worker. Summary of the Utility Model

[0004] In order to overcome the disadvantages that traditional fixed ladders have a certain length and volume, and a certain mass, in dense areas such as jungles and shrubs, especially when a single worker is carrying out the transportation, the overly long or large ladder will hinder the progress of the worker, is often not flexible enough, cannot be portably transported, is difficult to meet the on-site requirements, and will cause a relatively large load on the worker, the purpose is to provide a portable climbing ladder.

[0005] The technical implementation solution of the utility model is: a portable climbing ladder, which includes a first ladder frame, a second ladder frame, a third ladder frame, a fourth ladder frame, pedals, fixing blocks and limiting plates. The second ladder frame is hinged to the first ladder frame, the other end of the second ladder frame is hinged to the third ladder frame, the other end of the third ladder frame is hinged to the fourth ladder frame. The first ladder frame and the fourth ladder frame are symmetrically arranged. Pedals are evenly spaced in the first ladder frame, the second ladder frame, the third ladder frame and the fourth ladder frame. Fixing blocks are arranged on the front sides of the first ladder frame, the second ladder frame, the third ladder frame and the fourth ladder frame. Limiting plates are slidably arranged in the fixing blocks on the second ladder frame and the third ladder frame. Square grooves with the same size as the limiting plates are opened on the fixing blocks on the first ladder frame and the fourth ladder frame.

[0006] In addition, preferably, it further includes a support frame and rollers. Support frames are arranged on the front and rear sides of the lower part of the first ladder frame, and rollers are rotatably arranged on the support frames.

[0007] In addition, preferably, it further includes a strap and a female buckle. A strap is arranged in the middle of the front side of the first ladder frame, a male buckle is connected to the end of the strap, and a female buckle is arranged in the middle of the front side of the fourth ladder frame.

[0008] In addition, it is particularly preferred that it further includes a footrest and a sliding plate. The sliding plates are slidably provided on the front and rear sides of the lower parts of the first ladder frame and the fourth ladder frame, and the footrests are fixedly connected to the sliding plates.

[0009] In addition, it is particularly preferred that it further includes a hook, and the hook is provided on the front side of the first ladder frame.

[0010] In addition, it is particularly preferred that the hinge joint between the second ladder frame and the third ladder frame has a large rotational friction, and a large force is required for rotation.

[0011] In addition, it is particularly preferred that the pedal is provided with anti-slip lines.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model sets the climbing ladder into a rotatable and collapsible structure. During transportation, the volume and length of the collapsed ladder are both small, and the ladder is made of alloy, with a light weight, which can be easily carried. Moreover, the folding and unfolding are both convenient, with high flexibility, meeting the needs of outdoor use.

[0014] 2. The present utility model adds wheels at the bottom of the climbing ladder, making it easier to move on uneven ground without lifting the whole ladder, reducing the physical consumption during ladder transportation, and increasing the convenience and flexibility during the use of the ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0016] Figure 2 is a three-dimensional structural schematic diagram of the unfolded ladder of the present utility model.

[0017] The labels in the figure are: 1 - the first ladder frame, 2 - the second ladder frame, 3 - the third ladder frame, 4 - the fourth ladder frame, 5 - the pedal, 7 - the fixing block, 8 - the limiting plate, 9 - the binding strap, 91 - the female buckle, 10 - the support frame, 11 - the roller, 13 - the footrest, 14 - the sliding plate, 15 - the hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0019] Embodiment 1: A portable climbing ladder, as Figure 1-2As shown in the figure, it includes a first ladder frame 1, a second ladder frame 2, a third ladder frame 3, a fourth ladder frame 4, a pedal 5, a fixing block 7 and a limiting plate 8. The second ladder frame 2 is hinged to the first ladder frame 1, the other end of the second ladder frame 2 is hinged to the third ladder frame 3, and the other end of the third ladder frame 3 is hinged to the fourth ladder frame 4. The first ladder frame 1 and the fourth ladder frame 4 are symmetrically arranged. When the ladder is fully unfolded, the whole ladder is an A-frame ladder. The purpose of this setting is that the A-frame ladder has better stability than a conventional climbing ladder, and it can be used normally for single-person and multi-person operations. The first ladder frame 1, the second ladder frame 2, the third ladder frame 3 and the fourth ladder frame 4 are all evenly spaced with pedals 5 for climbing. The four ladder frames are all slightly inclined. When the ladder is unfolded, the pedals 5 will be parallel to the ground. And the pedals 5 are made of alloy and are hollow inside, so the overall mass of the ladder is small. Fixing blocks 7 are provided on the front sides of the first ladder frame 1, the second ladder frame 2, the third ladder frame 3 and the fourth ladder frame 4. Limiting plates 8 are slidably arranged in the fixing blocks 7 on the second ladder frame 2 and the third ladder frame 3. Square grooves with the same size as the limiting plates 8 are opened on the fixing blocks 7 on the first ladder frame 1 and the fourth ladder frame 4. When the limiting plates 8 cooperate with the fixing blocks 7, the hinge joints between the ladder frames can be rotationally limited.

[0020] When the climbing ladder of the present utility model needs to be used, first, the ladder needs to be unfolded to Figure 2 the state shown in the figure. The unfolding steps are as follows: taking the fourth ladder frame 4 as the fulcrum, through the hinge point of the fourth ladder frame 4 and the third ladder frame 3, rotate the other ladder frames except the fourth ladder frame 4 counterclockwise to the right side position of the fourth ladder frame 4. Then rotate the first ladder frame 1 clockwise downward. At this time, the hinge point between the second ladder frame 2 and the third ladder frame 3 is at the uppermost position, and the lower parts of the first ladder frame 1 and the fourth ladder frame 4 are in contact with the ground. Subsequently, rotate the first ladder frame 1 and the second ladder frame 2 to the right by a certain angle with the hinge point between the upper second ladder frame 2 and the third ladder frame 3 as the axis. Finally, slide the limiting plates 8 on the second ladder frame 2 and the third ladder frame 3 downward and penetrate into the fixing blocks 7 on the first ladder frame 1 and the fourth ladder frame 4. Through the cooperation of the limiting plates 8 and the fixing blocks 7, the rotation at the hinge joints of the ladder frames is prevented from affecting the normal use of the ladder. After the climbing ladder is fully unfolded, it can be used. And when the operation is completed, rotate the ladder to fold it up. The folded ladder has a small volume and length, and is made of alloy with a light mass, so it can be carried conveniently, and both the folding and unfolding are relatively convenient and highly flexible, meeting the needs of outdoor use.

[0021] Embodiment 2: On the basis of Embodiment 1, as Figure 1-2As shown in the figure, it further includes a support frame 10 and rollers 11. The front and rear sides of the lower part of the first ladder frame 1 are fixedly welded with the support frame 10, and the rollers 11 are rotatably arranged on the support frame 10. When moving the ladder in a relatively open area, the whole ladder can be supported by the rollers 11 for movement, without lifting the whole ladder, reducing the physical consumption when carrying the ladder, and increasing the convenience and flexibility of using the ladder. When the ladder is unfolded, the rollers 11 do not contact the ground.

[0022] In a specific embodiment: As Figure 1 shown in the figure, it further includes a strap 9 and a female buckle. A strap 9 with a certain degree of tightness is arranged in the middle of the front side of the first ladder frame 1. The end of the strap 9 is connected with a male buckle, and a female buckle 91 is arranged in the middle of the front side of the fourth ladder frame 4. When the male buckle is inserted into the female buckle 91, the female buckle 91 will catch the male buckle. The purpose of arranging the strap 9 is to connect the first ladder frame 1 and the fourth ladder frame 4 through the strap, to prevent the ladder frames on the ladder from rotating and opening during handling, which affects the handling. At the same time, by arranging the strap 9, a part is provided for the worker to carry the ladder by hand, improving the portability.

[0023] In a specific embodiment: As Figure 1-2 shown in the figure, it further includes a foot pad 13 and a sliding plate 14. The sliding plates 14 are slidably arranged on the front and rear sides of the lower parts of the first ladder frame 1 and the fourth ladder frame 4, and the foot pads 13 are fixedly connected to the sliding plates 14. When the ladder is unfolded, the sliding plates 14 in the first ladder frame 1 and the fourth ladder frame 4 are slid out. The four sliding plates 14 and the foot pads 13 are in an open shape at the bottom of the ladder. Through the open foot pads 13, the area of the support region is increased, and the ladder is stably supported, improving the safety and stability of using the ladder.

[0024] In a specific embodiment: As Figure 1-2 shown in the figure, it further includes a hook 15. A hook 15 for hanging a toolbox / tool bag is arranged on the front side of the first ladder frame 1. When moving the ladder through the rollers 11, people can hang the toolbox / tool bag on the hook 15, further enhancing the practicality and convenience of the ladder.

[0025] In a preferred embodiment: The hinge joint between the second ladder frame 2 and the third ladder frame 3 has a large rotational friction, and a large force is required for rotation. When the worker climbs up the ladder for use, the second ladder frame 2 and the third ladder frame 3 will not rotate easily, ensuring the reliability during use.

[0026] In a preferred embodiment: The pedal 5 is provided with anti-slip lines, which improve the friction between the worker and the contact surface of the pedal, preventing the user from slipping or falling during climbing and ensuring the safety of the user.

[0027] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A portable climbing ladder, comprising a first ladder frame, a second ladder frame, a third ladder frame, and a fourth ladder frame. The second ladder frame is hinged to the first ladder frame, the other end of the second ladder frame is hinged to the third ladder frame, the other end of the third ladder frame is hinged to the fourth ladder frame, and the first ladder frame and the fourth ladder frame are symmetrically arranged. It is characterized in that It further comprises pedals, fixing blocks, and limiting plates. The first ladder frame, the second ladder frame, the third ladder frame, and the fourth ladder frame are all evenly spaced with pedals. Fixing blocks are provided on the front sides of the first ladder frame, the second ladder frame, the third ladder frame, and the fourth ladder frame. Limiting plates are slidably arranged in the fixing blocks on the second ladder frame and the third ladder frame. Square grooves with the same size as the limiting plates are formed in the fixing blocks on the first ladder frame and the fourth ladder frame.

2. A portable climbing ladder according to claim 1, characterized in that, It further comprises support frames and rollers. Support frames are provided on the front and rear sides of the lower part of the first ladder frame, and rollers are rotatably arranged on the support frames.

3. A portable ladder for climbing heights according to claim 2, characterized in that, It further comprises a binding strap and a female buckle. A binding strap is provided in the middle of the front side of the first ladder frame, the end of the binding strap is connected with a male buckle, and a female buckle is provided in the middle of the front side of the fourth ladder frame.

4. A portable step ladder according to claim 3, wherein, It further comprises foot pads and sliding plates. Sliding plates are slidably arranged on the front and rear sides of the lower parts of the first ladder frame and the fourth ladder frame, and foot pads are fixedly connected to the sliding plates.

5. A portable step ladder according to claim 4, characterized in that, It further comprises a hook. A hook is provided on the front side of the first ladder frame.

6. A portable climbing ladder according to claim 5, characterized in that, The hinge joint between the second ladder frame and the third ladder frame has a large rotational friction, and a large force is required for rotation.

7. A portable climbing ladder according to claim 6, characterized in that, Anti-slip patterns are formed on the pedals.

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