Aerial work platform

Abstract

Disclosed in the present application is an aerial work platform, comprising: a platform main body comprising a base and a basic guardrail surrounding the periphery of the base; and an elevating device mounted in the platform main body. The elevating device comprises: a pedal hinged to one side of the basic guardrail by means of a first hinge assembly, the pedal comprising an elevating work surface, and having a working position where the elevating work surface is horizontally arranged and a non-working position where the elevating work surface is vertically arranged; and an elevating guardrail arranged on the basic guardrail and capable of moving vertically relative to the basic guardrail, the elevating guardrail having a working position extending out of the platform main body and a non-working position retracted into the platform main body, wherein when the elevating guardrail is in the non-working position, the elevating guardrail can cooperate with the basic guardrail to clamp the pedal, so as to keep the pedal in the non-working position.

Description

aerial work platforms Technical Field

[0001] The present application relates to the technical field of aerial work, for example, to an aerial work platform. Background Art

[0002] Aerial work platforms are specialized equipment for high-altitude work, with a wide range of uses. With the advancement of science and technology in modern society, aerial work platforms have become ubiquitous in many areas of social life, with their applications becoming increasingly widespread. Whether in construction, civil engineering, or daily life, aerial work platforms are indispensable. However, existing aerial work platforms in the industry face the following challenges: To provide a larger operating area, aerial work platforms are relatively large. However, due to their size limitations, they are difficult to raise into confined spaces (such as when installing wiring harnesses), making it difficult for operators to meet their height requirements.

[0003] Summary of the Invention

[0004] The present application provides an aerial work platform, which can meet the operator's needs for climbing work in a narrow space by adding a climbing device to the work platform.

[0005] This application adopts the following technical solutions: aerial work platform, including:

[0006] A platform body, the platform body comprising a base and a basic guardrail arranged around the periphery of the base;

[0007] A climbing device installed in the platform body, the climbing device comprising:

[0008] A pedal, the pedal being hinged to one side of the basic guardrail via a first hinge assembly, the pedal including an elevated working surface, the pedal having a working position in which the elevated working surface is horizontally arranged and a non-working position in which the elevated working surface is vertically arranged;

[0009] The climbing guardrail is arranged on the basic guardrail and can move up and down relative to the basic guardrail. The climbing guardrail has a working position extending out of the platform body and a non-working position retracted into the platform body. When the climbing guardrail is in the non-working position, the climbing guardrail can cooperate with the basic guardrail to clamp the pedal to keep the pedal in the non-working position.

[0010] In one embodiment, the first hinge assembly includes a first hinge seat and a first pin shaft, the first hinge seat is detachably connected to the basic guardrail, and the first pin shaft passes through the first hinge seat and the pedal and is rotatably connected to the first hinge seat.

[0011] In one embodiment, the first hinge seat is engaged with the basic guardrail.

[0012] In one embodiment, the basic guardrail includes a supporting cross bar and a supporting longitudinal bar extending in different directions, and the first hinged seat includes an axle seat body, a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are both arranged on the axle seat body, and the first clamping portion and the second clamping portion are respectively clamped on the supporting cross bar and the supporting longitudinal bar.

[0013] In one embodiment, the first hinge seat includes a support portion, and when the pedal is in the working position, the support portion abuts against the bottom surface of the pedal.

[0014] In one embodiment, limit plates are provided on both sides of the pedal. When the pedal is in the working position, the limit plates overlap the basic guardrail. When the pedal is in the non-working position, the limit plates overlap the climbing guardrail.

[0015] In one embodiment, the limiting plate is configured to be L-shaped, and when the pedal is in the working position, the limiting plate contacts the outer side surface of the climbing guardrail.

[0016] In one embodiment, a closable notch is provided on the side of the climbing guardrail facing away from the pedal.

[0017] In one embodiment, the climbing guardrail is movably sleeved in a connecting sleeve provided on the basic guardrail, and a second locking member is radially inserted in the connecting sleeve. The second locking member can connect the connecting sleeve and the climbing guardrail to keep the climbing guardrail in a working position or a non-working position.

[0018] In one embodiment, the climbing device also includes a climbing ladder hinged to the pedal and a third locking member, the climbing ladder includes a non-working position abutting the bottom surface of the pedal and a working position where its free end can abut against the base, and the third locking member is configured to lock the climbing ladder and the pedal so that the climbing ladder remains in the working position or the non-working position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is an overall structural diagram of an aerial work platform when a climbing device provided by an embodiment of the present application is in use;

[0020] FIG2 is an overall structural diagram of an aerial work platform when a climbing device provided in an embodiment of the present application is in a non-use state;

[0021] FIG3 is a schematic diagram of an exploded structure of a climbing device provided in an embodiment of the present application;

[0022] FIG4 is an enlarged schematic diagram of point A in FIG3 ;

[0023] FIG5 is an enlarged schematic diagram of point B in FIG3 ;

[0024] FIG6 is a schematic structural diagram of a climbing device provided in an embodiment of the present application when not in use;

[0025] FIG7 is a schematic structural diagram of a first hinge seat provided in an embodiment of the present application;

[0026] FIG8 is a schematic structural diagram of a connecting sleeve provided in an embodiment of the present application.

[0027] In the picture:

[0028] 1. Platform body; 11. Base; 12. Basic guardrail; 121. Support crossbar; 122. Support longitudinal bar;

[0029] 2. Climbing device; 21. Pedal; 211. Connecting plate; 212. Limiting plate; 213. Baffle; 214. Climbing work surface; 22. Climbing guardrail; 221. Vertical rod; 2211. Stopper; 2212. First limiting hole; 2213. Second limiting hole; 222. Baffle; 222a. Fixed baffle; 222b. Movable baffle; 223. Snap plate; 2231. Locking hole; 224. First locking member; 225. Notch; 23. First hinge assembly; 231. First hinge seat; 2311. Axle seat body ;23111, first axial hole;2312, first clamping part;2313, second clamping part;2314, supporting part;232, first pin shaft;24, connecting sleeve;241, sleeve part;2411, first plug hole;242, third clamping part;25, second locking member;26, climbing ladder;261, third limiting hole;27, second hinge assembly;271, second hinge seat;2711, second axial hole;2712, second plug hole;2713, third plug hole;272, second pin shaft;28, third locking member. DETAILED DESCRIPTION

[0030] The present application is described below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are merely for explaining the present application. For ease of description, only the parts relevant to the present application are shown in the accompanying drawings.

[0031] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. A person of ordinary skill in the art will understand the meaning of the above terms in this application according to the circumstances.

[0032] In this application, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes to provide distinctions.

[0034] Referring to Figures 1 to 8, an aerial work platform is proposed in an embodiment of the present application, including a platform body 1 and a climbing device 2 installed in the activity area of ​​the platform body 1. The climbing device 2 can provide the operator with a working surface (hereinafter referred to as the climbing working surface 214) that is higher than the working surface of the platform body 1 on the basis of the platform body 1. The area of ​​the climbing working surface 214 is smaller than the working surface of the platform body 1 to adapt to a working space whose length is shorter than the length of the platform body 1.

[0035] To ensure safety, the platform body 1 includes a base 11 and a basic guardrail 12 arranged around the periphery of the base 11. The top surface of the base 11 serves as the working surface of the platform body 1. The platform body 1 should have translation and lifting functions to accommodate workspaces in different locations. The lifting and translation structures configured to achieve the lifting and translation functions of the platform body 1 can both utilize relevant technologies. For example, the lifting structure can utilize a hydraulic lifting structure or a scissor lift structure, while the translation structure can utilize a vehicle. These are not limitations of this embodiment.

[0036] The climbing device 2 is arranged on the inner side of the basic guardrail 12, and includes a pedal 21 and a climbing guardrail 22. The pedal 21 provides an ascending working surface 214 for the operator, and the ascending guardrail 22 can provide protection for the operator on the ascending working surface 214. In order to save space, the climbing device 2 has two states: an in-use state and a non-use state. Corresponding to the above two states, the pedal 21 has a working position in which the ascending working surface 214 is set horizontally and a non-working position in which the ascending working surface 214 is set vertically. In order to realize the conversion of the pedal 21 between the above two positions, the pedal 21 is hinged to one side of the basic guardrail 12. The ascending guardrail 22 has a working position extending out of the platform body 1 and a non-working position retracted into the platform body 1. The ascending guardrail 22 in the working position can provide protection for the operator on the ascending working surface 214; the ascending guardrail 22 in the non-working position is located on one side of the basic guardrail 12 and can cooperate with the basic guardrail 12 to clamp the pedal 21. In order to realize the conversion of the climbing guardrail 22 between the above two positions, the climbing guardrail 22 is installed on the basic guardrail 12 and can move up and down relative to the basic guardrail.

[0037] When the pedal 21 in the aerial work platform is in the working position, it can form an ascending work surface 214. The operator can stand on the ascending work surface 214 to perform ascending work. This not only expands the range of activities available to the operator in the height direction of the aerial work platform, but also adapts to a narrow work space. The ascending guardrail 22 in the working position can provide protection for the operator on the ascending work surface 214, ensuring the safety of the operator in performing operations. After the ascending work is completed, the pedal 21 can be adjusted to a non-working position that is aligned with the basic guardrail 12, and the ascending guardrail 22 can be adjusted to a non-working position that is retracted into the platform body 1. The ascending guardrail 22 in the non-working position can prevent the platform body 1 from interfering with the external environment during translation, and can cooperate with the platform body 1 to clamp the pedal 21 to prevent the pedal 21 from colliding with the operator during the entire translation process of the aerial work platform.

[0038] In this embodiment, the platform body 1 is modeled after the structure of aerial work platforms in related art. Its base 11 comprises a fixed base and an extension base that are movably connected. The extension base can extend or retract horizontally relative to the fixed base to freely adjust the length of the platform body 1 along the extension base's extension direction, expanding the horizontal range of space available for operator movement within the platform body 1. To accommodate the adjustable base 11, the basic guardrail 12 is also provided in separate sections, including a fixed guardrail secured to the periphery of the fixed base and an extension guardrail secured to the periphery of the extension base. Both the fixed guardrail and the extension guardrail are configured as U-shaped frames with opposing openings, forming a closed ring structure to provide effective protection. In one embodiment, two support crossbars 121 and one support longitudinal bar 122 are provided at the same height in the middle of the extension guardrail along the vertical direction. The support crossbar 121 extends along the extension base's extension direction, while the support longitudinal bar 122 extends horizontally perpendicular to the support crossbar 121. Adding a climbing device 2 to the aerial work platform structure can reduce modification costs.

[0039] Based on the platform body 1 , the climbing device 2 is arranged on the extended guardrail, which can reduce the interference between the lifting structure and the translation structure connected to the bottom of the fixed base 11 and the external environment compared to being arranged on the fixed guardrail.

[0040] Referring to Figures 1 to 3 and Figures 6 and 7, the climbing device 2 includes a first hinge assembly 23, through which the pedal 21 is hinged to the extended guardrail. The first hinge assembly 23 includes a first hinge seat 231 and a first pin 232. The cross-section of the first hinge seat 231 is U-shaped. Two connecting plates 211 extend from the side of the pedal 21 close to the first hinge seat 231. The connecting plates 211 are inserted into the first hinge seat 231 and achieve rotational coordination with the first hinge seat 231 through the first pin 232 that is rotatably connected to the first hinge seat 231. At the same time, a cotter pin is radially inserted into the first pin 232 to prevent the first pin 232 from detaching from the first hinge seat 231. In one embodiment, two groups of first hinge assemblies 23 are provided, which are spaced apart on the pedal 21 along the extension direction of the supporting longitudinal rod 122.

[0041] To improve the usability of the pedal 21, the first hinged seat 231 is detachably connected to the extended guardrail. Referring to Figure 7 , the first hinged seat 231 includes a shaft seat body 2311 and a first clamping portion 2312. The shaft seat body 2311 is provided with a first shaft hole 23111 for the first pin 232 to pass through. The first clamping portion 2312 is fixed to the shaft seat body 2311 and is engaged with the support crossbar 121. In one embodiment, the first clamping portion 2312 has a U-shaped cross-section, and a fastener is inserted into the open end of the first clamping portion 2312. The fastener may include, but is not limited to, a D-shaped pin, a bolt, or other structures.

[0042] In one embodiment, the first hinged seat 231 further includes a second clamping portion 2313, which is arranged perpendicular to the first clamping portion 2312. The second clamping portion 2313 is fixed to the shaft seat body 2311 and engages with the supporting longitudinal rod 122. The second clamping portion 2313 also has a U-shaped cross-section, and a fastener is also inserted into the open end of the second clamping portion 2313. The provision of the second clamping portion 2313 increases the contact area between the first hinged seat 231 and the extension guardrail, thereby improving the stability of the first hinged seat 231 when installed on the extension guardrail.

[0043] Continuing with FIG7 , the first hinged seat 231 further includes a support portion 2314 disposed on one end of the seat body 2311 proximate to the pedal 21 and extending toward the pedal 21. When the pedal 21 is in the working position, the support portion 2314 can contact and cooperate with the bottom surface of the pedal 21 to support the pedal 21 and limit the tilting angle of the pedal 21. In one embodiment, the support portion 2314 is integrally formed with the seat body 2311.

[0044] As shown in Figures 1 and 4, a limit plate 212 is provided on the pedal 21. At least two limit plates 212 are provided on opposite sides of the pedal 21 and are located in the middle position of the pedal 21 extending along the direction of the support cross bar 121. When the pedal 21 is placed flat, the multiple limit plates 212 can be respectively overlapped on the support cross bars 121 located on opposite sides of the pedal 21. The support cross bar 121 cooperates with the limit plates 212 to limit the pedal 21, making it difficult for the pedal 21 to continue to flip downward, thereby maintaining the stability of the pedal 21. During the upward flipping process of the pedal 21, the limit plates 212 automatically disengage from the support cross bar 121, and the pedal 21 can be quickly adjusted from the working position to the non-working position. In one embodiment, the limit plate 212 is set to an L-shaped structure. When it overlaps with the top surface of the support cross bar 121, it can also contact the outer side surface of the support cross bar 121. At this time, the limit plates 212 located on the opposite sides of the pedal 21 cooperate with each other. In addition to limiting the downward flipping of the pedal 21, the pedal 21 can also be limited along the direction of the supporting longitudinal rod 122, thereby improving the safety of the operator when using the pedal 21.

[0045] In order to improve the connection stability between the limit plate 212 and the pedal 21, the pedal 21 is provided with an upwardly bent baffle 213 on the opposite sides near the above-mentioned two supporting cross bars 121. The limit plate 212 is connected to the baffle 213 by methods including but not limited to welding. The setting of the baffle 213 can ignore the restrictions on the installation of the limit plate 212 caused by the thickness of the pedal 21, and the baffle 213 can also reduce the possibility of the operator stepping on the pedal 21 to a certain extent.

[0046] Referring to Figure 6, when the pedal 21 is in the non-working position, the limit plate 212 can be overlapped on the vertical rod 221 of the climbing guardrail 22. Under the action of the limit plate 212, even if the area of ​​the pedal 21 is small and the climbing guardrail 22 is difficult to clamp and restrict the pedal 21 itself, the pedal 21 can be indirectly clamped and restricted through the cooperation of the limit plate 212, and there is no need to set up other locking structures separately for the non-working position of the pedal 21.

[0047] In order to prevent the climbing device 2 from affecting the operator's operation on the platform body 1, an openable notch 225 is provided on the side of the climbing guardrail 22 facing away from the pedal 21. When the climbing guardrail 22 is in a non-working position, the notch 225 can be opened to allow the operator to enter and exit, thereby reducing the impact of the climbing guardrail 22 on the size of the working surface of the platform body 1. Due to the provision of the notch 225, when the operator is working on the platform body 1, he can walk freely on the platform body 1 without being interfered with by the climbing guardrail 22 in a non-working position, thus avoiding the impact of the climbing guardrail 22 on the size of the working surface of the platform body 1 to the greatest extent. Therefore, even if the climbing device 2 is installed, it will not affect the use of the aerial work platform under other working conditions (mainly referring to the case where the working area is long in the horizontal direction).

[0048] As shown in Figures 1-3 and 6, the climbing guardrail 22 is configured as a rectangular frame structure. Vertical bars 221 are disposed at each of the four corners of the rectangular frame. Barriers 222 are connected between the tops of adjacent vertical bars 221 to enclose a rectangular protective space. The barrier bars 222 are divided into fixed bars 222a and movable bars 222b. The barrier bar 222, located on the hinged end of the climbing guardrail 22 facing away from the pedal 21, is the movable bar 222b, which is detachably connected to the vertical bars 221. The remaining barrier bars 222 are fixed bars 222a. When the climbing guardrail 22 is in the working position, the two ends of the movable blocking rod 222b are respectively connected to the two vertical rods 221. At this time, the gap 225 of the climbing guardrail 22 is in a closed state, which can prevent the operator from falling from the protective space. When the climbing guardrail 22 is in the non-working position, at least one end of the movable blocking rod 222b can be separated from the vertical rod 221, thereby opening the gap 225 for the operator to enter and exit. For example, of the two vertical rods 221 connected to the movable blocking rod 222b, one has a clamping plate 223 at the top, which is provided with a clamping groove with an upward opening. The other is hinged to one end of the movable blocking rod 222b, and the free end of the movable blocking rod 222b can be clamped into the clamping groove of the clamping plate 223. After use, the free end of the movable blocking rod 222b can be lifted upward and flipped to fit the vertical rod 221 connected to the hinged end of the movable blocking rod 222b, and the gap 225 is fully opened. Since the pedal 21 and the climbing guardrail 22 are separately arranged, the height of the climbing guardrail 22 is not necessarily the same as the basic guardrail 12. In order to reduce manufacturing costs and enable the climbing guardrail 22 to be completely retracted into the basic guardrail 12, the height of the climbing guardrail 22 in this embodiment is set to be lower than the height of the basic guardrail 12.

[0049] To improve the stability of the connection between the movable blocking rod 222b and the clamping plate 223, a first locking member 224 is further provided on the free end of the movable blocking rod 222b. The first locking member 224 can be inserted into a locking hole 2231 provided on the clamping plate 223 to lock the movable blocking rod 222b and the vertical rod 221, thereby fixing the movable blocking rod 222b relative to the vertical rod 221. The first locking member 224 can be an indexing pin. The structure and operating principle of the indexing pin belong to related art and will not be described in detail in this embodiment.

[0050] Based on the above-mentioned structure of the climbing guardrail 22, the climbing device 2 also includes a connecting sleeve 24 configured to connect the climbing guardrail 22 and the basic guardrail 12. The four connecting sleeves 24 are respectively movably connected to the four vertical rods 221 and connected to the basic guardrail 12. The setting of the connecting sleeve 24 can provide guidance for the lifting and lowering of the climbing guardrail 22, ensuring that the climbing guardrail 22 can accurately switch between the working position and the non-working position in the height direction.

[0051] In this embodiment, the climbing device 2 also includes a second locking member 25. The stability of the vertical rod 221 in the working position and the non-working position mainly depends on the second locking member 25. The second locking member 25 can be inserted radially into the connecting sleeve 24 and connected to the vertical rod 221 to lock the vertical rod 221 and the connecting sleeve 24, thereby keeping the climbing guardrail 22 in the working position or the non-working position. The second locking member 25 can be a limit pin. In other embodiments, the stability of the climbing guardrail 22 in the working position and the non-working position can also rely on the friction between the vertical rod 221 and the connecting sleeve 24.

[0052] Similar to the first hinged seat 231, the connecting sleeve 24 is detachably connected to the base guardrail 12, thereby achieving a detachable connection between the climbing guardrail 22 and the base guardrail 12. The climbing guardrail 22 can be set on different platform bodies 1 to improve utilization. The connecting sleeve 24 includes a sleeve portion 241 with openings at both axial ends and a third clamping portion 242, wherein the sleeve portion 241 is a cylindrical structure with both axial ends extending through it. A first insertion hole 2411 for inserting the second locking member 25 is radially provided on the sleeve portion 241. The third clamping portion 242 is fixedly connected to the sleeve portion 241 and can be clamped on the support crossbar 121. In one embodiment, the cross-section of the third clamping portion 242 is also U-shaped, and a fastener is provided at its open end.

[0053] To improve stability, the vertical rod 221 is provided with a first limiting hole 2212 and a second limiting hole 2213 radially extending through the vertical rod 221 at its upper and lower ends, respectively. When the climbing guardrail 22 is in the working position, the first limiting hole 2212 and the first insertion hole 2411 are opposite each other, and the second locking member 25 sequentially passes through the first insertion hole 2411 and the first limiting hole 2212 to lock the connecting sleeve 24 and the vertical rod 221. When the climbing guardrail 22 is in the non-working position, the second limiting hole 2213 and the first insertion hole 2411 are opposite each other, and the second locking member 25 sequentially passes through the first insertion hole 2411 and the second limiting hole 2213 to lock the connecting sleeve 24 and the vertical rod 221. In this embodiment, the second locking member 25 can also be an indexing pin.

[0054] As shown in FIG5 , a raised stopper 2211 is provided below the first limiting hole 2212 on the vertical rod 221. When the lower end surface of the connecting sleeve 24 is in contact with the stopper 2211, the climbing guardrail 22 is in the working position, and the first limiting hole 2212 is directly opposite the first insertion hole 2411 on the connecting sleeve 24. Therefore, in addition to preventing the vertical rod 221 from being separated from the connecting sleeve 24, the stopper 2211 also automatically aligns the first limiting hole 2212 with the first insertion hole 2411 on the connecting sleeve 24, thereby reducing the difficulty of inserting the second locking member 25 into the first limiting hole 2212 and the first insertion hole 2411. The blocking rod 222 arranged at the top of the vertical rod 221 can play a role similar to the stop part 2211. When the blocking rod 222 is in contact with the upper end face of the connecting sleeve 24, it is in a non-working position. The second limiting hole 2213 is opposite to the first socket 2411 on the connecting member, which reduces the difficulty of inserting the second locking member 25 into the second limiting hole 2213 and the first socket 2411.

[0055] To facilitate the operator's access to the platform 21, the climbing device 2 also includes a ladder 26. To avoid interfering with the raising and lowering of the climbing guardrail 22, the ladder 26 has a working position and a non-working position. The non-working position is when the ladder 26 rests against the bottom surface of the platform 21, preventing it from interfering with the raising and lowering of the climbing guardrail 22. The working position is when the free end of the ladder 26 abuts the base 11 when the platform 21 is in the working position. To facilitate the transition between the working and non-working positions, the ladder 26 is hinged to the platform 21. While facilitating the operator's access to the platform 21, the ladder 26 also provides support for the platform 21. When the ladder 26 is hinged to the free end of the platform 21, the first hinged seat 231 and the ladder 26 support the platform 21 at both ends of its length, ensuring high stability when the platform 21 is in the working position.

[0056] As shown in Figures 1-4, the climbing device 2 also includes a second hinge assembly 27, through which the climbing ladder 26 is hingedly connected to the pedal 21. The second hinge assembly 27 includes a second hinge seat 271 and a second pin 272. The second hinge seat 271 is fixed to the bottom surface of the pedal 21, and the second pin 272 is inserted through the top of the climbing ladder 26 and the second hinge seat 271 to achieve the hinged connection between the climbing ladder 26 and the pedal 21. To prevent the second pin 272 from disengaging from the second hinge seat 271, a bolt shaft assembly can be used for the second pin 272. The bolt shaft assembly itself is related art and will not be described in detail here.

[0057] In one embodiment, the second hinged seat 271 has a U-shaped cross-section and a hinged end with an opening facing the step 21. When the ladder 26 abuts the closed end of the second hinged seat 271, the second hinged seat 271 restricts further rotation of the ladder 26, placing the ladder 26 in its operating position. When in the operating position, the angle between the ladder 26 and the step 21 is obtuse, making it easier for an operator to access the step 21 using the ladder 26.

[0058] To enhance the stability of the connection between the ladder 26 and the footboard 21, the climbing device 2 further includes a third locking member 28 configured to lock the ladder 26 and the footboard 21. The third locking member 28 is capable of connecting the ladder 26 to the second hinged seat 271 and being detachably connected to the second hinged seat 271 and / or the ladder 26 to maintain the ladder 26 in either the operative or inoperative position. To adjust the position of the footboard 21, simply release the third locking member 28 from the second hinged seat 271.

[0059] In one embodiment, the third locking member 28 is implemented as a stop pin. A second insertion hole 2712 and a third stop hole 261 are provided on the second hinged seat 271 and the ladder 26, respectively, for the third locking member 28 to pass through. The second insertion hole 2712 is located below the second axial hole 2711 provided on the second hinged seat 271, for the second pin 272 to pass through, and is offset away from the hinged end of the pedal 21. When the third locking member 28 passes through the second insertion hole 2712 and the third stop hole 261, the second pin 272 cooperates to lock the ladder 26 with the second hinged seat 271, thereby locking the ladder 26 in the working position with the pedal 21. In this embodiment, the third locking member 28 is implemented as a D-shaped pin, making assembly and disassembly easier.

[0060] In order to prevent the climbing ladder 26 from flipping over after being folded to the bottom surface of the pedal 21, a third hole 2713 is further provided on the second hinged seat 271. The third hole 2713 and the second axial hole 2711 are in the same plane. When the climbing ladder 26 is attached to the bottom surface of the pedal 21, the third hole 2713 and the third limiting hole 261 are aligned. At this time, the second locking member 25 can be inserted into the third hole 2713 and the third limiting hole 261 to achieve locking of the climbing ladder 26 and the pedal 21 in the non-working position.

[0061] Due to the provision of the support portion 2314 and the stop plate 212 in this embodiment, the pedal 21 can only be moved to the non-operating position by flipping it upward. In other embodiments without the support portion 2314 and the stop plate 212, the pedal 21 can be flipped downward to contact the base guardrail 12. Of course, in this embodiment, flipping the pedal 21 upward reduces the length restriction imposed by the pedal 21 on the length of the ladder 26, providing the operator with a higher working surface 214 than when the pedal 21 is flipped downward.

[0062] The above-mentioned aerial work platform is used as follows:

[0063] When the climbing device 2 needs to be used, the second locking member 25 is pulled out from the first limiting hole 2212 and the first insertion hole 2411, the climbing guardrail 22 is pulled and lifted to the highest point by holding the climbing guardrail 22, and the second locking member 25 is inserted into the second limiting hole 2213 and the first insertion hole 2411 to lock the climbing guardrail 22 and the connecting sleeve 24. At this time, the climbing guardrail 22 remains in the working position, and the third locking member 28 is pulled out from the third hole 2713 and the third limiting hole 261 to start the climbing. The ladder 26 is raised, and the third locking member 28 is inserted into the second insertion hole 2712 and the third limiting hole 261. After the step 21 is unfolded, the limiting plate 212 is overlapped on the supporting cross bar 121. The free end of the climbing ladder 26 is in contact with the base 11. After the operator climbs onto the step 21 via the climbing ladder 26, the free end of the movable blocking rod 222b is engaged with the clamping groove and the first locking member 224 is used to lock the movable blocking rod 222b and the vertical rod 221. The operator then performs climbing operations on the climbing work surface 214.

[0064] After the operation is completed, remove the first locking piece 224, lift the movable blocking rod 222b, and the operator descends to the base 11 of the platform body 1 via the climbing ladder 26, remove the third locking piece 28 and fold the climbing ladder 26 and the pedal 21, so that the limit plate 212 is attached to the basic guardrail 12, and the climbing ladder 26 is attached to the pedal 21, and the third locking piece 28 is inserted into the third plug hole 2713 and the third limiting hole 261 to achieve locking between the pedal 21 and the climbing ladder 26, remove the second locking piece 25, hold the climbing guardrail 22, pull the climbing guardrail 22 down to the lowest point, so that it cooperates with the basic guardrail 12 to limit the pedal 21.

[0065] This application provides a climbing device including a step and a climbing guardrail on the platform body. The step provides the operator with a climbing work surface that is higher than the work surface on the platform body. This not only expands the range of height available to the operator for the aerial work platform, but also adapts to confined work spaces. The climbing guardrail provides protection for the operator when on the climbing work surface, providing high safety. Moreover, the climbing device can be folded into the platform body when not in use, saving space. The climbing guardrail can also cooperate with the basic guardrail to clamp and limit the step, preventing the step from turning over without the need for an additional locking structure.

Claims

1. A working platform at height, comprising: A platform main body (1), the platform main body (1) comprising a base (11) and a basic guardrail (12) surrounding the outer periphery of the base (11); An ascending device (2) installed within the platform main body (1), the ascending device (2) comprising: A pedal (21), the pedal (21) being hinged to one side of the basic guardrail (12) by a first hinge assembly (23), the pedal (21) comprising a working surface for ascending (214), the pedal (21) having a working position in which the working surface for ascending (214) is horizontal and a non-working position in which the working surface for ascending (214) is vertical; An ascending guardrail (22), the ascending guardrail (22) being disposed on the basic guardrail (12) and capable of moving up and down relative to the basic guardrail (12), the ascending guardrail (22) having a working position extending out of the platform main body (1) and a non-working position retracted into the platform main body (1); in the case where the ascending guardrail (22) is in the non-working position, the ascending guardrail (22) can cooperate with the basic guardrail (12) to clamp the pedal (21) so as to keep the pedal (21) in the non-working position.

2. The aerial work platform according to claim 1, wherein, The first hinge assembly (23) comprises a first hinge seat (231) and a first pin shaft (232), the first hinge seat (231) being detachably connected to the basic guardrail (12), the first pin shaft (232) passing through the first hinge seat (231) and the pedal (21) and being rotatably connected to the first hinge seat (231).

3. The aerial work platform according to claim 2, wherein, The first hinge seat (231) is snap-fitted on the basic guardrail (12).

4. The aerial work platform according to claim 3, wherein The basic guardrail (12) comprises support cross bars (121) and support longitudinal bars (122) with different extending directions, the first hinge seat (231) comprises a seat main body (2311), a first clamping portion (2312) and a second clamping portion (2313), both the first clamping portion (2312) and the second clamping portion (2313) are disposed on the seat main body (2311), and the first clamping portion (2312) and the second clamping portion (2313) are respectively snap-fitted on the support cross bar (121) and the support longitudinal bar (122).

5. The aerial work platform according to claim 3, wherein, The first hinge seat (231) comprises a support portion (2314), in the case where the pedal (21) is in the working position, the support portion (2314) abuts against the bottom surface of the pedal (21).

6. The aerial work platform according to claim 2, wherein, Limiting plates (212) are arranged on both sides of the pedal (21), in the case where the pedal (21) is in the working position, the limiting plates (212) overlap with the basic guardrail (12), and in the case where the pedal (21) is in the non-working position, the limiting plates (212) overlap with the ascending guardrail (22).

7. The aerial work platform according to claim 6, wherein, The limiting plates (212) are arranged in an L shape, and in the case where the pedal (21) is in the working position, the limiting plates (212) contact the outer side surface of the basic guardrail (12).

8. The aerial work platform according to claim 1, wherein, One side of the climbing guardrail (22) facing away from the pedal (21) is provided with an openable notch (225).

9. The aerial work platform according to claim 1, wherein, The climbing guardrail (22) is movably sleeved in a connecting sleeve (24) arranged on the base guardrail (12). A second locking member (25) is inserted radially in the connecting sleeve (24). The second locking member (25) can connect the connecting sleeve (24) and the climbing guardrail (22) to keep the climbing guardrail (22) in the working position or the non-working position.

10. The aerial work platform according to claim 1, wherein, The climbing device (2) further includes a climbing ladder (26) hinged to the pedal (21) and a third locking member (28). The climbing ladder (26) has a non-working position where it fits against the bottom surface of the pedal (21) and a working position where the free end of the climbing ladder (26) can abut against the base (11). The third locking member (28) is arranged to lock the climbing ladder (26) and the pedal (21) to keep the climbing ladder (26) in the working position or the non-working position.

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