Adjustable aluminum alloy herringbone ladder

Abstract

The invention discloses an adjustable aluminum alloy herringbone ladder, and particularly relates to the field of herringbone ladders.The adjustable aluminum alloy herringbone ladder comprises a first ladder frame and a second ladder frame, the upper end of the first ladder frame is hinged to the upper end of the second ladder frame, and first pedal plates are fixedly arranged on the first ladder frame and the second ladder frame correspondingly; telescopic ladder assemblies are arranged at the bottom ends of the first ladder assembly and the second ladder assembly in a sliding mode, second pedal plates are arranged on the telescopic ladder assemblies, and anti-skid foot pads are fixedly arranged at the bottom ends of the telescopic ladder assemblies. The telescopic ladder frame is arranged at the bottom ends of the first ladder frame and the second ladder frame, so that the height of the herringbone ladder can be adjusted, and when the height of the herringbone ladder is adjusted, the telescopic second pedal is arranged on the telescopic ladder frame, so that the inconvenience that people directly step on the first pedal when the extension length of the telescopic ladder frame is large can be prevented. The height of the herringbone ladder can be adjusted, the herringbone ladder can be conveniently applied to floors or house types with different heights, and the practicability is better.

Description

Technical Field

[0001] The invention relates to the technical field of herringbone ladders, in particular to an adjustable aluminum alloy herringbone ladder. Background Art

[0002] Ladders are commonly used tools in people's daily lives, especially for some higher places where it is impossible to work by standing directly. The herringbone ladder is a type of climbing tool used for decoration work above the plane. When it is used, the front and rear ladder bars and the ground form an isosceles triangle, which looks like a "human" character, so it is figuratively called a "herringbone ladder". The herringbone ladder has gained more popularity because it does not need a leaning point and is easy to carry.

[0003] In current building decoration projects, there are height differences between different floors or different apartment types. When working on high walls or ceilings, a herringbone ladder is often needed, and the specifications of the herringbone ladder are fixed; if the ladder is too long, it will be inconvenient to carry and move; if the ladder is too short and the location to be constructed is too high, it will cause inconvenience to the construction. If the construction is a shaped roof with a sloping ceiling, mixing short ladders with long ladders will not only reduce the efficiency of construction, but also increase the labor of transportation. Summary of the invention

[0004] The object of the present invention is to provide an adjustable aluminum alloy stepladder to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an adjustable aluminum alloy herringbone ladder, comprising a first ladder frame and a second ladder frame, the upper ends of the first ladder frame and the second ladder frame are hingedly arranged, the first ladder frame and the second ladder frame are both fixedly provided with a first foot pedal, the bottom ends of the first ladder frame and the second ladder frame are both slidably provided with a telescopic ladder frame, and the telescopic ladder frame is provided with a second foot pedal, and the bottom end of the telescopic ladder frame is fixedly provided with an anti-slip foot pad.

[0006] In a preferred embodiment, a first installation cavity is provided at the bottom ends of the first ladder frame and the second ladder frame, the telescopic ladder frame is slidably arranged in the first installation cavity, and a plurality of first installation through holes are evenly spaced on the telescopic ladder frame, a second installation through hole is provided at the lower ends of the first ladder frame and the second ladder frame, and a positioning pin is matched at the second installation through hole, and the height of the stepladder can be adjusted by arranging a slidable telescopic ladder frame at the bottom ends of the first ladder frame and the second ladder frame.

[0007] In a preferred embodiment, telescopic foot pedals are sleeved on both ends of the second foot pedal, a second mounting cavity is opened on the inner side of the telescopic foot pedal, the second foot pedal is slidably arranged inside the second mounting cavity, a third mounting through hole is opened on the telescopic foot pedal, fourth mounting through holes are opened on both ends of the telescopic foot pedal, and limiting bolts are matched at the third mounting through holes, and the third mounting through holes are rectangularly arranged. Since the herringbone ladder is narrow at the top and wide at the bottom, when the position of the second foot pedal is adjusted, the telescopic foot pedal can slide in the second foot pedal, so that the second foot pedal can be placed at different heights.

[0008] In a preferred embodiment, the first ladder frame, the second ladder frame, the telescopic ladder frame, the first foot pedal, the second foot pedal and the telescopic foot pedal are all made of aluminum alloy material, which is light in weight and easy to carry.

[0009] In a preferred embodiment, a limit rope is provided between the first foot pedal on the first ladder frame and the first foot pedal on the second ladder frame, and the provision of the limit rope can prevent the angle between the first ladder frame and the second ladder frame from being too large to cause danger.

[0010] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0011] The present invention can adjust the height of the stepladder by arranging a telescopic ladder frame at the bottom ends of the first ladder frame and the second ladder frame, and when adjusting the height of the stepladder, a telescopic second foot pedal is arranged on the telescopic ladder frame, which can prevent people from stepping directly on the first foot pedal when the telescopic ladder frame is extended to a large length. The present application can adjust the height of the stepladder, which is convenient for application to floors or apartment types of different heights, and has better practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a partial structural schematic diagram of the telescopic foot pedal and the second foot pedal of the present invention.

[0015] In the figure: 1, first ladder frame; 2, second ladder frame; 3, first foot pedal; 4, telescopic ladder frame; 5, second foot pedal; 6, anti-slip foot pad; 7, first mounting through hole; 8, positioning pin; 9, telescopic foot pedal; 10, limiting bolt; 11, limiting rope; 12, third mounting through hole; 13, fourth mounting through hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 2 The present invention provides an adjustable aluminum alloy stepladder, comprising a first ladder frame 1 and a second ladder frame 2, wherein the upper ends of the first ladder frame 1 and the second ladder frame 2 are hingedly arranged, and the first ladder frame 1 and the second ladder frame 2 are both fixedly provided with a first foot pedal 3, and the bottom ends of the first ladder frame 1 and the second ladder frame 2 are both slidably provided with a telescopic ladder frame 4, and the telescopic ladder frame 4 is provided with a second foot pedal 5, and the bottom end of the telescopic ladder frame 4 is fixedly provided with an anti-slip foot pad 6.

[0018] In a preferred embodiment, a first installation cavity is formed at the bottom ends of the first ladder frame 1 and the second ladder frame 2, the telescopic ladder frame 4 is slidably arranged in the first installation cavity, and a plurality of first installation through holes 7 are evenly spaced apart on the telescopic ladder frame 4, a second installation through hole is formed at the lower ends of the first ladder frame 1 and the second ladder frame 2, and a positioning pin 8 is matched at the second installation through hole, and the telescopic ladder frame 4 can be fixed by inserting the positioning pin 8 into the first installation through hole 7 and the second installation through hole.

[0019] In a preferred embodiment, telescopic foot pedals 9 are sleeved on both ends of the second foot pedal 5, a second installation cavity is opened on the inner side of the telescopic foot pedal 9, and the second foot pedal 5 is slidably arranged inside the second installation cavity. A third installation through hole 12 is opened on the telescopic foot pedal 9, and a fourth installation through hole 13 is opened on both ends of the telescopic foot pedal 9, and a limiting bolt 10 is matched at the third installation through hole 12. The third installation through hole 12 is rectangular, and the telescopic foot pedal 9 can be fixed by inserting the limiting bolt 10 into the first installation through hole 7, the third installation through hole 12 and the fourth installation through hole 13.

[0020] In a preferred embodiment, the first ladder frame 1, the second ladder frame 2, the telescopic ladder frame 4, the first foot pedal 3, the second foot pedal 5 and the telescopic foot pedal 9 are all made of aluminum alloy material. The aluminum alloy material is light in weight, so that the overall weight of the herringbone ladder is light and easy to carry.

[0021] In a preferred embodiment, a limit rope 11 is provided between the first foot pedal 3 on the first ladder frame 1 and the first foot pedal 3 on the second ladder frame 2. The provision of the limit rope 11 can prevent the first ladder frame 1 and the second ladder frame 2 from opening at a large angle, which may cause certain risks.

[0022] Working principle of the present invention:

[0023] When in use, the height of the stepladder is first adjusted according to the user's needs. When adjusting, the telescopic ladder frame 4 slides inside the first ladder frame 1 and the second ladder frame 2 so that the telescopic ladder frame 4 extends to a certain length. When in use, scales can be set on the side walls of the telescopic ladder frame 4 to ensure that the extended length of each telescopic ladder frame 4 is constant to prevent the height of the stepladder from being uneven. After the telescopic ladder frame 4 is extended to a certain length, the first mounting through hole 7 on the telescopic ladder frame 4 corresponds to the second mounting through hole on the first ladder frame 1 and the second ladder frame 2, and the positioning pin 8 is inserted into the first mounting through hole 7 and the second mounting through hole to fix the telescopic ladder frame 4. After the telescopic ladder frame 4 is fixed, a second foot pedal 5 is added according to actual needs. If the telescopic ladder frame 4 is extended for a long time, it is inconvenient for people to step on the first foot pedal 3 directly, so the second foot pedal 5 needs to be added, and the telescopic foot pedals 9 at both ends of the second foot pedal 5 are slid so that the third mounting through hole 12 on the telescopic foot pedal 9 corresponds to the first mounting through hole 7 on the telescopic ladder frame 4, and then the limiting bolt 10 is inserted into the third mounting through hole 12, the first mounting through hole 7 and the fourth mounting through hole 13 to fix the telescopic foot pedal 9, and then fixed with a nut. After the height adjustment of the herringbone ladder is completed, it can be used normally.

[0024] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable aluminum alloy stepladder, comprising a first ladder frame (1) and a second ladder frame (2), wherein the upper ends of the first ladder frame (1) and the second ladder frame (2) are hingedly arranged, characterized in that: The first ladder frame (1) and the second ladder frame (2) are both fixedly provided with a first foot pedal (3), the bottom ends of the first ladder frame (1) and the second ladder frame (2) are both slidably provided with a telescopic ladder frame (4), and the telescopic ladder frame (4) is provided with a second foot pedal (5), and the bottom end of the telescopic ladder frame (4) is fixedly provided with an anti-slip foot pad (6).

2. The adjustable aluminum alloy stepladder according to claim 1, characterized in that: A first installation cavity is provided at the bottom end of the first ladder frame (1) and the second ladder frame (2), the telescopic ladder frame (4) is slidably arranged in the first installation cavity, and a plurality of first installation through holes (7) are evenly spaced on the telescopic ladder frame (4), a second installation through hole is provided at the lower end of the first ladder frame (1) and the second ladder frame (2), and a positioning pin (8) is matched at the second installation through hole.

3. The adjustable aluminum alloy stepladder according to claim 1, characterized in that: Both ends of the second foot pedal (5) are sleeved with telescopic foot pedals (9), a second installation cavity is provided on the inner side of the telescopic foot pedal (9), the second foot pedal (5) is slidably arranged inside the second installation cavity, a third installation through hole (12) is provided on the telescopic foot pedal (9), both ends of the telescopic foot pedal (9) are provided with fourth installation through holes (13), and a limiting bolt (10) is matched at the third installation through hole (12), and the third installation through hole (12) is arranged in a rectangular shape.

4. The adjustable aluminum alloy stepladder according to claim 3, characterized in that: The first ladder frame (1), the second ladder frame (2), the telescopic ladder frame (4), the first foot pedal (3), the second foot pedal (5) and the telescopic foot pedal (9) are all made of aluminum alloy material.

5. The adjustable aluminum alloy stepladder according to claim 1, characterized in that: A limit rope (11) is provided between the first footrest (3) on the first ladder frame (1) and the first footrest (3) on the second ladder frame (2).

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