Herringbone ladder

Abstract

The utility model provides a herringbone ladder. The herringbone ladder comprises a first ladder frame and a second ladder frame, the first ladder frame is movably connected with the second ladder frame; the pedals are arranged on the first ladder frame and / or the second ladder frame at intervals; the storage box is arranged at the top of the first ladder frame and the top of the second ladder frame in an opening and closing manner; the safety auxiliary assembly is arranged at the top of the first ladder frame and the top of the second ladder frame, the safety auxiliary assembly comprises a safety net, the safety net is arranged at the top of the first ladder frame and the top of the second ladder frame, and a reserved opening is formed in the safety net so that a target object can penetrate through the safety net to tread the pedals; the lifting mechanism is connected with the safety net and is configured to drive the safety net to ascend and descend between a contraction position and an unfolding position, when the safety net ascends to the unfolding position, the safety net is opened, the reserved opening is aligned with at least one pedal in the multiple pedals, and when the safety net descends to the contraction position, the safety net is folded and stored in the storage box.

Description

Technical Field

[0001] This application relates to the field of climbing equipment technology, and more specifically to an A-frame ladder. Background Technology

[0002] A-frame ladders are a type of climbing tool used for work in spaces above a flat surface (such as roofs). Due to their convenience, A-frame ladders are widely used for low-altitude work on construction sites and small-scale ceiling repairs in homes.

[0003] Many A-frame ladder users, after using the ladder to ascend to a higher platform, will leave the ladder to return. Based on the direct experience of some users, this process of leaving the A-frame ladder to ascend and then returning poses a significant safety risk. Users have limited visibility when descending, often using their feet to probe the steps below, and sometimes even unfastening their safety harness hooks beforehand. This descent without a firm footing increases the risk of accidents. However, current technologies primarily focus on ensuring the safety of workers standing on the A-frame ladder, neglecting the safety features needed when moving back and forth between heights after using the ladder.

[0004] Therefore, improvements are needed to at least partially address the aforementioned problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this utility model provides a first ladder frame; a second ladder frame, the first ladder frame and the second ladder frame being movably connected; a plurality of pedals, the plurality of pedals being spaced apart on the first ladder frame and / or the second ladder frame; a storage box, the storage box being openable and closable on the top of the first ladder frame and the second ladder frame; a safety auxiliary component, the safety auxiliary component being disposed on the top of the first ladder frame and the second ladder frame, wherein the safety auxiliary component includes: a safety net, the safety net being disposed on the top of the first ladder frame and the second ladder frame, the safety net having a reserved opening for a target object to pass through the safety net and step on the pedal; a lifting mechanism, the lifting mechanism being connected to the safety net, configured to: drive the safety net to rise and fall between a retracted position and an extended position, wherein when the safety net rises to the extended position, the safety net opens, and the reserved opening aligns with at least one of the plurality of pedals; when the safety net descends to the retracted position, the safety net folds and is stored in the storage box.

[0007] For example, the lifting mechanism includes a top bracket that connects to and supports the safety net, wherein the top bracket includes at least two first top support rods and at least two second top support rods, each of the first top support rods being telescopically connected to the first ladder frame, and each of the second top support rods being telescopically connected to the second ladder frame.

[0008] For example, both the first ladder frame and the second ladder frame have cavities inside. When the safety net is in the retracted position, each of the first top support rods is at least partially retracted into the cavity of the first ladder frame, and each of the second top support rods is at least partially retracted into the cavity of the second ladder frame. When the safety net is in the extended position, each of the first top support rods extends at least partially above the top of the first ladder frame, and each of the second top support rods extends at least partially above the top of the second ladder frame.

[0009] For example, the first ladder frame and the second ladder frame have openings on their sides away from the treads. At least two sets of first snap-fit ​​points are provided on the outer side of the openings in the first ladder frame, and at least two sets of second snap-fit ​​points are provided on the outer side of the openings in the second ladder frame. Each first top support rod is connected to a first snap-fit ​​assembly, which switches between the at least two sets of first snap-fit ​​points to retract or extend the first top support rod. Each second top support rod is connected to a second snap-fit ​​assembly, which switches between the at least two sets of second snap-fit ​​points to retract or extend the second top support rod. The at least two sets of first snap-fit ​​points are spaced apart along the length of the first ladder frame, and the at least two sets of second snap-fit ​​points are spaced apart along the length of the second ladder frame.

[0010] For example, the first snap-fit ​​assembly includes a first snap-fit ​​connector and a first snap-fit. One end of the first snap-fit ​​connector is rotatably connected to a first top support rod, and the other end of the first snap-fit ​​connector is fixedly connected to the first snap-fit. By rotating the first snap-fit ​​connector, the first snap-fit ​​is engaged with a set of first snap-fit ​​fixing points or separated from the first snap-fit ​​fixing points. The second snap-fit ​​assembly includes a second snap-fit ​​connector and a second snap-fit. One end of the second snap-fit ​​connector is rotatably connected to the second top support rod, and the other end of the second snap-fit ​​connector is fixedly connected to the second snap-fit. By rotating the second snap-fit ​​connector, the second snap-fit ​​is engaged with a set of second snap-fit ​​fixing points or separated from the second snap-fit ​​fixing points.

[0011] For example, one end of the first snap-fit ​​connector is fixedly connected to the first top support rod, and the other end of the first snap-fit ​​connector is rotatably connected to the first snap. By rotating the first snap, the first snap is engaged with a set of first snap fixing points or separated from the first snap fixing points. One end of the second snap-fit ​​connector is fixedly connected to the second top support rod, and the other end of the second snap-fit ​​connector is rotatably connected to the second snap. By rotating the second snap, the second snap is engaged with a set of second snap fixing points or separated from the second snap fixing points.

[0012] For example, when the safety net is in the retracted position, the first buckle assembly is engaged with the first buckle fixing point away from the storage box, and the second buckle assembly is engaged with the second buckle fixing point away from the storage box. When the safety net is in the extended position, the first buckle assembly is engaged with the first buckle fixing point close to the storage box, and the second buckle assembly is engaged with the second buckle fixing point close to the storage box.

[0013] For example, the storage box includes a storage compartment and a cover, the cover being movably connected to the storage compartment to open or close the storage compartment.

[0014] For example, one end of the cover plate is movably connected to the first side of the storage compartment, the second side of the storage compartment opposite to the first side is provided with a first connecting member, the cover plate is provided with a second connecting member that cooperates with the first connecting member, and when the cover plate covers the storage compartment, the first connecting member and the second connecting member are connected.

[0015] For example, the first ladder frame and the second ladder frame are hinged by a connecting assembly, the connecting assembly including a connecting shaft and at least two rings sleeved on the connecting shaft, the top of the first ladder frame being connected to at least one of the at least two rings, the top of the second ladder frame being connected to at least one of the at least two rings, the rings being configured to rotate relative to the connecting shaft, such that the first ladder frame and the second ladder frame can be opened or closed relative to each other.

[0016] According to this utility model, the A-frame ladder has a safety auxiliary component installed at the top of the first and second ladder frames. The safety auxiliary component includes a safety net and a lifting mechanism. The safety net has a reserved opening to help the target object pass through the safety net and accurately step onto the steps of the A-frame ladder, avoiding the situation of missing a step or losing stability. When a fall from a height occurs, the safety net is opened by the lifting structure to provide a cushion for the falling person, increase the reaction time of the falling person, and help them actively hook onto the safety net, thus increasing safety. Attached Figure Description

[0017] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0018] In the attached image:

[0019] Figure 1 This invention provides a schematic diagram showing the structure of an A-frame ladder safety net in operation according to a specific embodiment of the present invention.

[0020] Figure 2 A partial structural schematic diagram of the top support of the A-frame ladder according to a specific embodiment of the present invention is shown;

[0021] Figure 3 This invention provides a schematic diagram of the structure of a stepladder safety net retracted according to a specific embodiment of the present invention.

[0022] Figure 4 A schematic diagram of the structure of a safety net according to a specific embodiment of the present invention is shown;

[0023] Figure 5 This diagram shows a partial structural schematic of the connection between the top bracket and the buckle in a specific embodiment of the present invention;

[0024] Figure 6 A partial structural diagram of the connection between the top bracket and the buckle is shown in another specific embodiment of the present invention. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0026] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0027] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion.

[0028] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below” or “under” the other element or feature will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0030] In related technologies, a front crossbar is installed on the front frame of the A-frame ladder above the treads, and a rear crossbar is installed on the rear frame. A locking slot is located on one side of the plastic step platform, and an opening is located on the other side. A safety hook device with a guide surface is movably installed near the opening on the other side of the plastic step platform. When the A-frame ladder is unfolded, the user presses down on the plastic step platform, causing the rear crossbar to contact the guide surface of the safety hook device and gradually be hooked by it. When the rear crossbar disengages from the guide surface and is hooked by the safety hook device, the A-frame ladder is fully unfolded, and the plastic step platform is securely locked, ensuring safety and reliability. Simultaneously, the rear and front crossbars support the plastic step platform upwards, greatly improving the safety of using the A-frame ladder.

[0031] However, many A-frame ladder users, after using the ladder to ascend to a higher platform, will leave the ladder to go back up. Based on the direct experience of some users on site, the safety risks are high when leaving the A-frame ladder to ascend and then returning. Users have limited visibility when descending, often using their feet to feel for the steps below, and sometimes even unfastening the safety harness hooks at the top for easier descent. The entire process of descending without a firm footing increases the likelihood of accidents. Currently, related technologies mainly focus on solving the safety problems of construction workers standing on the A-frame ladder, but do not address the safety assistance issues when moving back and forth on the A-frame ladder after ascending.

[0032] To address at least one of the aforementioned technical problems, this application provides an A-frame ladder, comprising: a first ladder frame; a second ladder frame, the first and second ladder frames being movably connected; a plurality of treads, the plurality of treads being spaced apart on the first ladder frame and / or the second ladder frame; a storage box, the storage box being openable and closable on the top of the first and second ladder frames; and a safety auxiliary component, the safety auxiliary component being disposed on the top of the first and second ladder frames, wherein the safety auxiliary component includes: a safety net, the safety net being disposed on the top of the first and second ladder frames, the safety net having a reserved opening for a target object to pass through the safety net and step on the treads; and a lifting mechanism, the lifting mechanism being connected to the safety net and configured to: drive the safety net to rise and fall between a retracted position and an extended position, wherein when the safety net rises to the extended position, the safety net opens and the reserved opening aligns with at least one of the plurality of treads; and when the safety net descends to the retracted position, the safety net folds and is stored in the storage box.

[0033] According to this application, the A-frame ladder is equipped with a safety auxiliary component at the top of the first and second ladder frames. The safety auxiliary component includes a safety net and a lifting mechanism. The safety net has a reserved opening to assist the target object in passing through the safety net and accurately stepping on the steps of the A-frame ladder, avoiding situations where the object misses its footing or loses its footing. In the event of a fall from a height, the safety net is expanded by the lifting structure to provide a cushion for the falling person, increasing the reaction time of the falling person and making it easier for them to actively hook onto the safety net, thus increasing safety.

[0034] To fully understand this application, a detailed structure will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0035] The following is for reference. Figures 1 to 6 Describing an A-frame ladder according to an embodiment of this application, the A-frame ladder includes a first ladder frame 1; a second ladder frame 2, the first ladder frame 1 and the second ladder frame 2 being movably connected; a plurality of steps 3, the plurality of steps 3 being spaced apart on the first ladder frame 1 and / or the second ladder frame 2; a storage box, the storage box being openable and closable at the top of the first ladder frame 1 and the second ladder frame 2; and a safety auxiliary component, the safety auxiliary component being disposed at the top of the first ladder frame 1 and the second ladder frame 2, wherein the safety auxiliary component includes: a safety net 12, the safety net 12 being disposed at the top of the first ladder frame 1 and the second ladder frame 2. The top of the first ladder frame 1 and the second ladder frame 2, the safety net 12 is provided with a reserved opening 15, so that the target object can pass through the safety net 12 and step on the pedal 3; the lifting mechanism is connected to the safety net 12 and is configured to drive the safety net 12 to rise and fall between the retracted position and the unfolded position, wherein, when the safety net 12 rises to the unfolded position, the safety net 12 opens and the reserved opening 15 is aligned with at least one of the multiple pedals 3; when the safety net 12 falls to the retracted position, the safety net 12 is folded and stored in the storage box.

[0036] In this embodiment, a safety auxiliary component is installed at the top of the first ladder frame 1 (i.e., the front ladder frame) and the second ladder frame 2 (i.e., the rear ladder frame). Since the target object climbs the ladder to a higher platform and then returns from that height, the safety risk is high. The target object's field of vision is limited when descending, and they often use their feet to explore the ladder steps below, easily causing safety hazards. The safety auxiliary component provides safety protection for the target object when returning from a height. The safety auxiliary component includes a safety net 12 and a lifting mechanism. The safety net 12 is installed at the top of the first ladder frame 1 and the second ladder frame 2. The lifting mechanism is connected to the safety net 12 and is used to unfold and retract the safety net 12. Simultaneously, the safety net 12 has a reserved opening 15 to help the target object more easily find the ladder steps 3 below, allowing the target object to accurately step onto the steps 3 after passing through the safety net 12, thus increasing safety protection for the target object leaving the ladder.

[0037] In some embodiments, such as Figure 2 As shown, the first ladder frame 1 (i.e., the front ladder frame) and the second ladder frame 2 (i.e., the rear ladder frame) are movably connected. Exemplarily, the first ladder frame 1 and the second ladder frame 2 are hinged by a connecting assembly, which includes a connecting shaft 13 and at least two rings (not shown) sleeved on the connecting shaft 13. The rings can be closed or open, and their shape can be circular or elliptical, etc. The number of rings can be 2, 3, 4, 5, or 6, etc., without specific limitation. The top of the first ladder frame 1 is connected to at least one ring, and the top of the second ladder frame 2 is connected to at least one ring. The rings are configured to rotate relative to the connecting shaft, such that the first ladder frame 1 and the second ladder frame 2 can unfold or retract relative to each other. Figure 1 As shown, when the first ladder frame 1 and the second ladder frame 2 are unfolded, they form a herringbone shape, which can improve the stability of the herringbone ladder and enhance safety during use. Optionally, the rings connected to the first ladder frame 1 and the rings connected to the second ladder frame 2 are alternately arranged along the circumference of the connecting shaft 13.

[0038] In some embodiments, such as Figure 1 As shown, the A-frame ladder includes multiple treads 3, which are spaced apart on the first ladder frame 1 and / or the second ladder frame 2. Specifically, both the first ladder frame 1 and the second ladder frame 2 include two opposing ladder frames. The treads 3 of the first ladder frame 1 are spaced apart between the two ladder frames, and the treads 3 of the second ladder frame 2 are spaced apart between the two opposing ladder frames. The treads 3 facilitate climbing the A-frame ladder for the target object.

[0039] In some embodiments, such as Figure 3As shown, the top of the first ladder frame 1 and the second ladder frame 2 is provided with an openable storage box. The storage box includes a storage compartment 7 and a cover plate 9. The cover plate 9 is movably connected to the storage compartment 7 to open or close the storage compartment 7. The cover plate 9 includes multiple support blocks, and adjacent support blocks are movably connected to each other to make the structure of the cover plate 9 more flexible and the overall strength higher. Optionally, the cover plate 9 may also include an elastic fabric, which may include multiple support blocks and movably connect the multiple support blocks. Alternatively, in some other embodiments, adjacent support blocks may also be hinged. The bottom of the storage compartment 7 is provided with a support opening 14. The top support retracts or extends through the support opening 14 to drive the safety net 12 on the A-frame ladder to retract or extend.

[0040] In some embodiments, one end of the cover plate 9 is movably connected to the first side of the storage compartment 7. A first connecting member 8 is provided on the second side of the storage compartment 7 opposite to the first side. The cover plate 9 is provided with a second connecting member (not shown in the figure) that cooperates with the first connecting member 8. When the cover plate 9 closes the storage compartment 7, the first connecting member 8 and the second connecting member are connected. In one example, the first connecting member 8 can be a button position, and the second connecting member is a button adapted to the button position. When it is necessary to close the storage compartment 7, the button is fastened to the button position. In other examples, the first connecting member 8 can also be a snap-fit ​​point, and the second connecting member is a snap-fit ​​point adapted to the snap-fit ​​point. When it is necessary to close the storage compartment 7, the snap-fit ​​point is fastened to the snap-fit ​​point. Of course, other suitable methods of opening or closing the storage compartment 7 can also be used, and no specific limitation is made. The portions of the storage compartment 7 connected to the cover plate 9 on both sides, where it connects to the first ladder frame 1 and the second ladder frame 2, have a trapezoidal structure, facilitating the opening and closing of the A-frame ladder.

[0041] In some embodiments, such as Figure 1 and Figure 4 As shown, the A-frame ladder is also equipped with a safety auxiliary component, which is located at the top of the first ladder frame 1 and the second ladder frame 2. The safety auxiliary component includes a safety net 12 and a lifting mechanism. The lifting mechanism is connected to the safety net 12 and drives the safety net 12 to move up and down between a retracted position and an extended position. For example, the safety net 12 can be made of crisscrossing elastic ropes or other elastic materials, such as a trampoline-like material, so that the extended safety net 12 can provide additional safety for objects above it.

[0042] For example, the safety net 12 is provided with a reserved opening 15, which is only suitable for one target object to squeeze through. When the safety net 12 is raised to the unfolded position by the lifting mechanism, the safety net 12 is opened, and at this time the reserved opening 15 is aligned with at least one of the multiple pedals 3, for example, the pedal located near the top, so that the user can step on the pedal. When the safety net 12 is lowered to the retracted position by the lifting mechanism, the safety net 12 is folded and stored in the storage compartment 7 of the storage box, and the cover plate 9 seals the storage compartment 7. The reserved opening 15 on the safety net 12 helps the target object to more easily find the pedal 3 of the A-frame ladder below, so that the target object can accurately step on the pedal 3 after passing through the safety net 12, which increases the safety protection for the target object above the A-frame ladder and prevents the target object from falling.

[0043] In some embodiments, such as Figure 1 As shown, the lifting mechanism includes: a top bracket, which connects to and supports the safety net 12. The top bracket includes at least two first top support rods 10 and at least two second top support rods 11. Each first top support rod 10 is telescopically connected to a first ladder frame 1, and each second top support rod 11 is telescopically connected to a second ladder frame 2. When the first top support rods 10 and the second top support rods 11 are retracted, the safety net 12 is completely stored in the storage compartment 7, and the cover plate 9 seals the storage compartment 7. Storing the safety net in the storage compartment makes the A-frame ladder structure simpler, more aesthetically pleasing, and easier to transport. When the first top support rods 10 and the second top support rods 11 are extended, the cover plate 9 is opened, and the safety net is extended along with the first top support rods 10 and the second top support rods 11.

[0044] In some embodiments, such as Figure 1 As shown, the first ladder frame 1 and the second ladder frame 2 have openings on the side away from the treadle 3. At least two sets of first buckle fixing points 6 are provided on the outer side of the opening of the first ladder frame 1, and at least two sets of second buckle fixing points 61 are provided on the outer side of the opening of the second ladder frame 2. The at least two sets of first buckle fixing points 6 are distributed at intervals along the length extension direction of the first ladder frame 1, and the at least two sets of second buckle fixing points 61 are distributed at intervals along the length extension direction of the second ladder frame 2. Specifically, the first ladder frame 1 and the second ladder frame 2 each include two ladder frames, one side of each ladder frame is connected to a step 3, and an opening is provided on the opposite side of the side of each ladder frame connected to the step 3 (that is, the side away from the step 3). At least two sets of first buckle fixing points 6 are welded to the outside of each opening of the first ladder frame 1, for example, two, three or four sets of first buckle fixing points 6. At least two sets of second buckle fixing points 61 are welded to the outside of each opening of the second ladder frame 2, for example, two, three or four sets of second buckle fixing points 61. Each set of first buckle fixing points 6 is evenly spaced along the length extension direction of the first ladder frame 1, and each set of second buckle fixing points 61 is evenly spaced along the length extension direction of the second ladder frame 2.

[0045] In some embodiments, each first top support rod 10 is connected to a first snap-fit ​​assembly, which switches between at least two sets of first snap-fit ​​fixing points 6 to retract or extend the first top support rod 10. Each second top support rod 11 is connected to a second snap-fit ​​assembly, which switches between at least two sets of second snap-fit ​​fixing points 61 to retract or extend the second top support rod 11. A safety net 12 is connected to the first top support rod 10 and the second top support rod 11. When the safety net 12 is in the retracted position, the first top support rod 10 and the second top support rod 11 are retracted. The first snap-fit ​​assembly engages with the first snap-fit ​​fixing point 6 away from the storage box (e.g., the lowest first snap-fit ​​fixing point 6 of the opening in the first ladder frame 1), and the second snap-fit ​​assembly engages with the second snap-fit ​​fixing point 61 away from the storage box (e.g., the lowest second snap-fit ​​fixing point 61 of the opening in the second ladder frame 2). 1) The safety net 12 is stored in the storage compartment 7; when the safety net 12 is in the unfolded position, the first top support rod 10 and the second top support rod 11 extend, the first buckle assembly is fastened to the first buckle fixing point 6 near the storage box (for example, the first buckle fixing point 6 at the top of the opening of the first ladder frame 1), and the second buckle assembly is fastened to the second buckle fixing point 61 near the storage box (for example, the second buckle fixing point 61 at the top of the opening of the second ladder frame 2), and the safety net 12 is fully extended.

[0046] In some embodiments, such as Figure 5 and Figure 6As shown, the first buckle assembly includes a first buckle connector 16 and a first buckle 5. One end of the first buckle connector 16 is rotatably connected to the first top support rod 10, and the other end of the first buckle connector 16 is fixedly connected to the first buckle 5. By rotating the first buckle connector 16, the first buckle 5 is fastened onto a set of first buckle fixing points 6 or separated from the first buckle fixing points 6. The second buckle assembly includes a second buckle connector 161 and a second buckle 51. One end of the second buckle connector 161 is rotatably connected to the second top support rod 11, and the other end of the second buckle connector 161 is fixedly connected to the second buckle 51. By rotating the second buckle connector 161, the second buckle 51 is fastened onto a set of second buckle fixing points 61 or separated from the second buckle fixing points 61. Specifically, one end of the first top support rod 10 and the second top support rod 11 is connected to the safety net 12, and the other end of the first top support rod 10 and the second top support rod 11 is connected to the first buckle connector 16 and the second buckle connector 161, respectively. By rotating the first buckle connector 16 and the second buckle connector 161 at a certain angle, such as 90 degrees, the first buckle 5 is fastened to a set of first buckle fixing points 6, and the second buckle 51 is fastened to a set of second buckle fixing points 61, then the first top support rod 10 and the second top support rod 11 are fixed; or by rotating the first buckle connector 16 and the second buckle connector 161 at a certain angle, such as 90 degrees, the first buckle 5 is separated from the first buckle fixing point 6, and the second buckle 51 is separated from the second buckle fixing point 61. At this time, the first top support rod 10 and the second top support rod 11 can retract or extend, and the safety net 12 is retracted or extended accordingly.

[0047] In some embodiments, such as Figure 5 and Figure 6As shown, one end of the first snap-fit ​​connector 16 is fixedly connected to the first top support rod 10, and the other end of the first snap-fit ​​connector 16 is rotatably connected to the first snap-fit ​​5. By rotating the first snap-fit ​​5, the first snap-fit ​​5 is engaged with a set of first snap-fit ​​fixing points 6 or separated from the first snap-fit ​​fixing points 6. One end of the second snap-fit ​​connector 161 is fixedly connected to the second top support rod 11, and the other end of the second snap-fit ​​connector 161 is rotatably connected to the second snap-fit ​​51. By rotating the second snap-fit ​​51, the second snap-fit ​​51 is engaged with a set of second snap-fit ​​fixing points 61 or separated from the second snap-fit ​​fixing points 61. Specifically, the first buckle 5 and the second buckle 51 can be fixed by rotating the first buckle 5 and the second buckle 51 by a certain angle, such as 90 degrees, so that the first buckle 5 is engaged with a set of first buckle fixing points 6 and the second buckle 51 is engaged with a set of second buckle fixing points 61; or by rotating the first buckle 5 and the second buckle 51 by a certain angle, such as 90 degrees, the first buckle 5 is separated from the first buckle fixing point 6 and the second buckle 51 is separated from the second buckle fixing point 61. At this time, the first top support rod 10 and the second top support rod 11 can retract or extend, and the safety net 12 will retract or extend accordingly.

[0048] In some embodiments, such as Figure 1 and Figure 2 As shown, both the first ladder frame 1 and the second ladder frame 2 have cavities inside, which facilitate the storage of the top supports within the ladder frames. When the safety net 12 is in the retracted position, each of the first top support rods 10 is partially retracted into the cavity of the first ladder frame 1, and each of the second top support rods 11 is partially retracted into the cavity of the second ladder frame 2. The safety net 12 is completely stored in the storage compartment 7 of the storage box. When the safety net 12 is in the extended position, the cover 9 of the storage box needs to be opened. The bottom of the storage compartment 7 is provided with a support opening 14. The outer diameter of the support opening 14 is larger than the outer diameter of the first top support rods 10 and the second top support rods 11. The first top support rods 10 extend upward through the support opening 14, so that each of the first top support rods 10 at least partially extends above the top of the first ladder frame 1, and the second top support rods 11 extend upward through the support opening 14, so that each of the second top support rods 11 at least partially extends above the top of the second ladder frame 2. The safety net 12 is thus opened.

[0049] It is worth mentioning that the safety net can also be stored through a suitable structure. For example, the support rod itself is a telescopic support rod, which can be rotated and stored in a storage box after it is retracted.

[0050] In some embodiments, such as Figure 1 and Figure 3As shown, the A-frame ladder also includes a limiting component 4, which is detachably connected between the first ladder frame 1 and the second ladder frame 2, providing an auxiliary connection between them. The limiting component 4 may include at least two limiting members, each movably connected. When the first ladder frame 1 and the second ladder frame 2 are unfolded relative to each other, the limiting component 4 can limit the unfolding range of the A-frame ladder, thereby improving its stability.

[0051] In summary, the A-frame ladder according to the embodiments of this application, by setting a safety auxiliary component at the top of the first and second ladder frames, includes a safety net and a lifting mechanism. The safety net has a reserved opening to assist the target object in passing through the safety net and accurately stepping on the steps of the A-frame ladder, avoiding situations where the object misses its footing or loses its footing. When a fall from a height occurs, the safety net is expanded by the lifting structure to provide a buffer for the falling person, increasing the reaction time of the falling person and making it easier for them to actively hook onto the safety net, thus increasing safety.

[0052] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0053] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more aspects of the application, various features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, the point of application is that the corresponding technical problem can be solved with fewer features than all of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0054] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0055] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A type of A-frame ladder, characterized in that, include: First ladder frame; The second ladder frame is movably connected to the first ladder frame; Multiple treads are spaced apart on the first ladder frame and / or the second ladder frame; A storage box, which is closable and disposed on the top of the first ladder frame and the second ladder frame; A safety auxiliary component, wherein the safety auxiliary component is disposed at the top of the first ladder frame and the second ladder frame, wherein the safety auxiliary component includes: A safety net is provided at the top of the first ladder frame and the second ladder frame. The safety net has a reserved opening so that a target object can pass through the safety net and step on the pedal. A lifting mechanism, connected to the safety net, is configured to move the safety net up and down between a retracted position and an extended position. When the safety net is raised to the extended position, the safety net opens, and the reserved opening aligns with at least one of the multiple pedals. When the safety net is lowered to the retracted position, the safety net folds and is stored in the storage box.

2. The A-frame ladder as described in claim 1, characterized in that, The lifting mechanism includes: A top support bracket connects to and supports the safety net, wherein the top support bracket includes at least two first top support rods and at least two second top support rods, each of the first top support rods being telescopically connected to the first ladder frame, and each of the second top support rods being telescopically connected to the second ladder frame.

3. The A-frame ladder as described in claim 2, characterized in that, Both the first and second ladder frames have cavities inside. When the safety net is in the retracted position, each of the first top support rods is at least partially retracted into the cavity of the first ladder frame, and each of the second top support rods is at least partially retracted into the cavity of the second ladder frame. When the safety net is in the extended position, each of the first top support rods extends at least partially above the top of the first ladder frame, and each of the second top support rods extends at least partially above the top of the second ladder frame.

4. The A-frame ladder as described in claim 2, characterized in that, The first ladder frame and the second ladder frame have openings on the side away from the tread. The outer side of the opening of the first ladder frame has at least two sets of first buckle fixing points, and the outer side of the opening of the second ladder frame has at least two sets of second buckle fixing points. Each of the first top support rods is connected to a first snap-fit ​​assembly, which switches the connection between at least two sets of first snap-fit ​​fixing points to retract or extend the first top support rod. Each of the second top support rods is connected to a second snap-fit ​​assembly, which switches the connection between at least two sets of second snap-fit ​​fixing points to retract or extend the second top support rod. Wherein, at least two sets of the first buckle fixing points are distributed at intervals along the length extension direction of the first ladder frame, and at least two sets of the second buckle fixing points are distributed at intervals along the length extension direction of the second ladder frame.

5. The A-frame ladder as described in claim 4, characterized in that, The first buckle assembly includes a first buckle connector and a first buckle. One end of the first buckle connector is rotatably connected to a first top support rod, and the other end of the first buckle connector is fixedly connected to the first buckle. By rotating the first buckle connector, the first buckle is either engaged on a set of first buckle fixing points or separated from the first buckle fixing points. The second buckle assembly includes a second buckle connector and a second buckle. One end of the second buckle connector is rotatably connected to the second top support rod, and the other end of the second buckle connector is fixedly connected to the second buckle. By rotating the second buckle connector, the second buckle can be engaged on a set of second buckle fixing points or separated from the second buckle fixing points.

6. The A-frame ladder as described in claim 5, characterized in that, One end of the first buckle connector is fixedly connected to the first top support rod, and the other end of the first buckle connector is rotatably connected to the first buckle. By rotating the first buckle, the first buckle is fastened to a set of first buckle fixing points or separated from the first buckle fixing points. One end of the second buckle connector is fixedly connected to the second top support rod, and the other end of the second buckle connector is rotatably connected to the second buckle. By rotating the second buckle, the second buckle can be engaged on a set of second buckle fixing points or separated from the second buckle fixing points.

7. The A-frame ladder as described in claim 4, characterized in that, When the safety net is in the retracted position, the first buckle assembly is engaged with the first buckle fixing point away from the storage box, and the second buckle assembly is engaged with the second buckle fixing point away from the storage box. When the safety net is in the extended position, the first buckle assembly is engaged with the first buckle fixing point close to the storage box, and the second buckle assembly is engaged with the second buckle fixing point close to the storage box.

8. The A-frame ladder as described in claim 1, characterized in that, The storage box includes a storage compartment and a cover, wherein the cover is movably connected to the storage compartment to open or close the storage compartment.

9. The A-frame ladder as described in claim 8, characterized in that, One end of the cover plate is movably connected to the first side of the storage compartment. The second side of the storage compartment opposite to the first side is provided with a first connecting member. The cover plate is provided with a second connecting member that cooperates with the first connecting member. When the cover plate seals the storage compartment, the first connecting member and the second connecting member are connected.

10. The A-frame ladder as described in claim 1, characterized in that, The first ladder frame and the second ladder frame are hinged together by a connecting assembly, the connecting assembly including a connecting shaft and at least two rings sleeved on the connecting shaft. The top of the first ladder frame is connected to at least one of the at least two rings, and the top of the second ladder frame is connected to at least one of the at least two rings. The rings are configured to rotate relative to the connecting shaft, such that the first ladder frame and the second ladder frame can be opened or closed relative to each other.

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