A height-adjustable and safe and stable aerial work platform

Abstract

The utility model provides a height adjustable and safe and stable aerial work platform, including platform pedal, the guardrail of setting in the four around of platform pedal and the movable pedal of setting in the guardrail, one end of movable pedal is hinged in the guardrail, the other end can be folded up and down relative to the guardrail, the side of movable pedal is provided with the side stop support frame that can be folded and opened, and the side stop support frame contains fixed support vertical rod, movable support vertical rod, horizontal stop rod and horizontal support beam that constitute parallelogram shape frame, horizontal stop rod and horizontal support beam are arranged between fixed support vertical rod and movable support vertical rod, both ends of horizontal stop rod are hinged with fixed support vertical rod and movable support vertical rod respectively, both ends of horizontal support beam are hinged with fixed support vertical rod and movable support vertical rod respectively, horizontal support beam is located below horizontal stop rod and protrudes from horizontal stop rod in the direction of facing movable pedal to support the movable pedal that is turned to horizontal state when the side stop support frame is opened, and horizontal stop rod moves to the position above the outside of the movable pedal that is turned to horizontal state when the side stop support frame is opened, the utility model, through setting the side of movable pedal with the side stop support frame that can be folded and opened, can stably support movable pedal and block the human body foot or leg when opening, and the safety when working on movable pedal is improved.

Description

Technical Field

[0001] This invention relates to the field of aerial work equipment technology, and in particular to an aerial work platform that is height-adjustable and safe and stable. Background Technology

[0002] Aerial work platforms are mobile work platforms used for various industries to perform high-altitude operations, such as equipment installation and maintenance. These platforms are equipped with safety railings around their perimeter. Currently, the safety railings are an integral part of the platform, typically welded to it. The fixed height of the railings determines the minimum and maximum height of the aerial work platform, making it inconvenient for navigating lower passageways and unsuitable for diverse working environments.

[0003] Chinese invention patent application number 201510659915.8 discloses a telescopic guardrail for an aerial work platform, including a platform, a main pole, a secondary pole, a latch, and a crossbar; the main pole is welded around the platform, the main pole is a hollow structure, the secondary pole is inserted into the main pole, the latch is installed at the top of the main pole, and the crossbar is welded to the middle of the main pole and the top of the secondary pole. This aerial work platform can only adjust the height of the guardrail, but cannot increase the working height of the platform.

[0004] Therefore, the applicant previously filed an application with application number 2019223978695 for a height-adjustable aerial work platform, which includes a platform platform and guardrails surrounding the platform platform. At least one side of the guardrail is provided with a side baffle. A movable platform is provided above the platform platform. One end of the movable platform is hinged to the side baffle, and the other end can be flipped up and down relative to the side baffle. A fixing component for vertically fixing the movable platform to the side baffle and a support component for supporting the movable platform when flipped to a horizontal state are provided between the side baffle and the movable platform. The guardrails are provided with at least two layers, inner and outer, and at least one layer of the guardrails can be extended and retracted vertically to adjust the distance between the top of the guardrail and the platform platform.

[0005] This aerial work platform has a reversible movable platform above the platform footboard, which increases the working height of the aerial work platform at its highest position. However, it is easy to step off the movable platform, which may lead to a fall or other safety accidents. At the same time, the movable platform is held in place by a steel cable when it is flipped to the horizontal position. The stability of the movable platform is not very good because the steel cable is prone to swinging under stress, which can increase the psychological pressure during operation. Moreover, it is not particularly convenient to retract the steel cable. Summary of the Invention

[0006] The purpose of this invention is to provide a height-adjustable and safe and stable aerial work platform, solving the problems of insufficient safety and stability when using movable footboards in the prior art.

[0007] The above-mentioned objective of the present invention is achieved through the following technical solution: a height-adjustable and safe and stable aerial work platform, comprising a platform platform, guardrails surrounding the platform platform, and a movable platform mounted on the guardrails. One end of the movable platform is hinged to the guardrail, and the other end can be tilted up and down relative to the guardrail. A retractable and foldable side support frame is provided on the free end of the movable platform opposite to the hinged end. The side support frame includes fixed support rods, movable support rods, horizontal bars, and horizontal support beams forming a parallelogram-shaped frame. Both the horizontal stop bar and the horizontal support beam are located between the fixed support rod and the movable support rod. The two ends of the horizontal stop bar are hinged to the fixed support rod and the movable support rod, respectively. The two ends of the horizontal support beam are hinged to the fixed support rod and the movable support rod, respectively. The horizontal support beam is located below the horizontal stop bar and protrudes from the horizontal stop bar in the direction facing the movable pedal, so as to support the movable pedal that is flipped to a horizontal state when the side support frame is opened. The horizontal stop bar is located above and outside the movable pedal that is flipped to a horizontal state when the side support frame is opened.

[0008] Preferably, it further includes a fixing component for vertically fixing the side guard support frame in the retracted state to the guardrail; the fixing component includes at least one pair of magnets disposed between the side guard support frame and the guardrail, which can attract each other.

[0009] Preferably, it further includes a fixing component two for vertically fixing the movable pedal to the guardrail; the fixing component two includes at least a pair of magnets that are disposed between the movable pedal and the guardrail and can attract each other.

[0010] Preferably, the platform tread is provided with a support assembly for vertically supporting the horizontal support beam.

[0011] Preferably, the support assembly includes two support columns, which are located at the two side ends of the transverse support beam.

[0012] Preferably, the platform pedal is provided with a second support column that supports the movable support rod when the side support frame is opened.

[0013] Preferably, a step plate is provided between the fixed support rod and the movable support rod, located below the horizontal support beam and parallel to the horizontal support beam, and the two ends of the step plate are respectively hinged to the fixed support rod and the movable support rod.

[0014] Preferably, the side guard support frame and the movable pedal are connected by a linkage mechanism, so that the worker can operate the side guard support frame and the movable pedal simultaneously from the side of the side guard support frame.

[0015] Preferably, the linkage mechanism includes a worm gear, a turbine gear interacting with the worm gear, a turbine shaft for mounting the turbine gear and coaxially connected to the rotation center axis of the movable pedal, a gear shaft mounted on the guardrail parallel to the worm gear, a pair of gears meshing with each other on the gear shaft and the worm gear, a horizontal support beam fixed with a hinge shaft that cooperates with the fixed support rod, the gear shaft and the hinge shaft being coaxially connected, and a handle located directly above the platform pedal being connected to the gear shaft.

[0016] Preferably, the guardrail has at least two layers, inner and outer, and at least one layer of guardrail can be extended and retracted vertically to adjust the distance between the top of the guardrail and the platform step. The guardrail includes an outer guardrail and an inner guardrail. The outer guardrail is fixedly installed on the platform board, and the inner guardrail is located inside the outer guardrail and can be extended and retracted vertically. The inner guardrail includes vertical bars and horizontal bars. The vertical bars are telescopic structures, comprising at least two relatively movable rods. The vertical bars are vertically fixed to the platform footboard. The horizontal bars are fixedly connected to the upper end of the vertical bars and move up and down by the telescopic movement of the vertical bars. The vertical bars are equipped with positioning components for controlling the telescopic length of the vertical bars. The positioning components include positioning pins and positioning holes. The positioning pins are movably installed on one of the rods, and the positioning holes are located on the other rod.

[0017] The beneficial effects of this invention are: This invention features a retractable and retractable side support frame on the side of the movable pedal. When open, it stably supports the movable pedal and laterally blocks the feet or legs of the user, improving safety when working on the movable pedal. Flipping the movable pedal and retracting the side support frame do not affect the normal operation of the aerial work platform. A linkage mechanism is provided to ensure that the worker can operate the side support frame and the movable pedal simultaneously, making the aerial work platform more convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the aerial work platform according to Embodiment 1 of the present invention; Figure 2 This is a structural schematic diagram of the aerial work platform in Embodiment 1 of the present invention from another perspective; Figure 3 yes Figure 2 An explosion diagram of a medium-to-high altitude work platform.

[0019] Figure 4 This is a schematic diagram of the side support frame in Example 2; Figure 5 This is a schematic diagram of the structure of the aerial work platform in Example 3; Figure 6This is a structural schematic diagram of the aerial work platform of Example 3 from another perspective. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0022] Example: Figure 1-3 As shown, a height-adjustable and safe and stable aerial work platform includes a platform footboard 1, a guardrail 2 set around the platform footboard 1, and a movable footboard 3 set on the guardrail 2. One end of the movable footboard 3 is hinged to the guardrail 2, and the other end can be flipped up and down relative to the guardrail 2. When the movable footboard 3 is flipped to the horizontal state, it allows workers to stand and work, thereby increasing the working height of the aerial work platform at its highest position.

[0023] A retractable and foldable side support frame 4 is provided on the free end side opposite to the hinged end of the movable pedal 3. The side support frame 4 includes a fixed support rod 41, a movable support rod 42, a horizontal stop rod 43, and a horizontal support beam 44 forming a parallelogram-shaped frame. The fixed support rod 41 is fixedly supported on the platform pedal 1, and can be fixed to the platform pedal 1, the guardrail 2, or both. The horizontal stop rod 43 and the horizontal support beam 44 are both located between the fixed support rod 41 and the movable support rod 42. The two ends of the horizontal stop rod 43 are hinged to the fixed support rod 41 and the movable support rod 42, respectively. The two ends of the horizontal support beam 44 are hinged to the fixed support rod 41 and the movable support rod 42, respectively. The fixed support pole 41 is hinged to the movable support pole 42. The horizontal support beam 44 is located below the horizontal stop bar 43 and protrudes from the horizontal stop bar 43 in the direction facing the movable pedal 3. Applying a downward force to the horizontal stop bar 43 or the horizontal support beam 44 can increase the angle between the horizontal stop bar 43 and the fixed support pole 41, thereby achieving the so-called openability. Applying an upward force to the horizontal stop bar 43 or the horizontal support beam 44 can decrease the angle between the horizontal stop bar 43 and the fixed support pole 41, thereby achieving the so-called retractability. When the side support frame 4 is opened, the movable support rod 42 directly or indirectly supports the platform pedal 1, keeping the side support frame in the open position. At this time, the horizontal support beam 44 can be used to support the movable pedal 3, which has been flipped to a horizontal position, while the horizontal stop bar 43 moves to a position above and to the outside of the movable pedal 3, which is flipped to a horizontal position, to laterally block the feet or legs of the user, preventing them from slipping and reducing the risk of falling. In addition, when the side support frame 4 is opened, the horizontal support beam 44 supports the movable pedal 3 from below, making the movable pedal 3 more stable, reliable, and safer than using a chain to hold it up. Furthermore, in terms of operation, in the prior art, the chain needs to be tidied up after the movable pedal 3 is turned to the vertical position to prevent the tangled chain from causing safety hazards. Moreover, the movable pedal 3 will block the chain after being turned to the vertical position, making the chain difficult to tidy up. However, in this application, by retracting the side guard support frame 4, this problem is directly avoided. At the same time, by opening the side guard support frame 4, the positions of the horizontal support beam 44 and the horizontal guard bar 43 can be adjusted simultaneously, making operation convenient.

[0024] It also includes a fixing component for vertically fixing the side guard support frame 4 in the retracted state to the guardrail 2; the fixing component includes at least one pair of magnets 5 respectively disposed between the side guard support frame 4 and the guardrail 2, which can attract each other. The magnets 5 are respectively fixed to the guardrail 2 and the movable support rod 42. When the side guard support frame 4 is retracted, the two are attracted by the magnets 5, thereby fixing the side guard support frame 4.

[0025] It also includes a fixing component two for vertically fixing the movable pedal 3 to the guardrail 2; the fixing component two includes at least a pair of magnets 6 that are respectively disposed between the movable pedal 3 and the guardrail 2 and can attract each other. The magnets 6 are respectively fixed on the guardrail 2 and the movable pedal 3. When the movable pedal 3 is flipped upward to the vertical state, the two are attracted by the magnets 6, thereby fixing the movable pedal 3.

[0026] The platform footboard 1 is equipped with a support assembly 1 for vertically supporting the horizontal support beam 44. The support assembly 1 includes two support columns 1-1, which are located at the two side ends of the horizontal support beam 44. The support assembly 1 reduces the risk of deformation of the horizontal support beam 44, optimizes the stress on the horizontal support beam 44 at each hinge point, makes the hinge points less prone to breakage, ensures the safety performance and lifespan of the side support frame 4, and improves the overall safety performance and lifespan of the aerial work platform.

[0027] The platform pedal 1 is provided with a support column 1-2 that supports the movable support rod 42 when the side support frame 4 is opened. In this way, the movable support rod 42 can be designed to be as short as possible, reducing the weight of the entire side support frame 4, thereby facilitating the folding and unfolding of the side support frame 4.

[0028] Regarding the guardrail 2, existing technology is directly adopted. The guardrail 2 has two layers, including an outer guardrail and an inner guardrail. The outer guardrail is fixedly installed on the platform step 1, and the inner guardrail is located inside the outer guardrail. The inner guardrail can be extended and retracted vertically to adjust the vertical height of the upper end of the inner guardrail to the platform step.

[0029] The inner guardrail includes vertical bars 221 and horizontal bars 222. Vertical bars 221 are telescopic structures, comprising two relatively movable rods that are nested together. Vertical bars 221 are vertically fixed to the platform footboard 1. Horizontal bars 222 are fixedly connected to the upper end of vertical bars 221 and move up and down with the extension and retraction of vertical bars 221. A positioning assembly 223 is provided on vertical bars 221 to control their extension and retraction length. Positioning assembly 223 includes a positioning pin and a positioning hole. The positioning pin is movably mounted on one rod, and the positioning hole is located on the other rod. Axial movement of the positioning pin causes it to enter or leave the positioning hole, controlling the locking and unlocking of the two rods, thereby extending and retracting vertical bars 221.

[0030] In this embodiment, there are four vertical rods 221, which are symmetrically arranged in pairs on the left and right sides of the movable pedal 3. There are three horizontal rods 222, two of which are arranged on the left and right sides of the movable pedal and are horizontally connected between the two vertical rods 221 on the corresponding sides, and the other horizontal rod 222 is connected between the two horizontal rods 222 on the left and right sides.

[0031] Example 2: Due to the presence of the horizontal bar 43, it is necessary to cross a higher horizontal bar 43 to reach the movable pedal 3. At the same time, when the movable pedal 3 is set at a high position, it is inconvenient for workers to climb to the movable pedal 3. Therefore, this example further optimizes the design based on Example 1: like Figure 4 As shown, a step plate 45 is provided between the fixed support rod 41 and the movable support rod 42, located below the horizontal support beam 44 and parallel to the horizontal support beam 44. The two ends of the step plate 45 are respectively hinged to the fixed support rod 41 and the movable support rod 42.

[0032] When the side support frame 4 is opened, it has at least three functions: making it easy for workers to reach a horizontal position, preventing workers from stepping into empty spaces, and providing stable support for the movable step 3. Moreover, it is easy to operate with a single opening operation, and the side support frame 4 will not occupy a lot of platform space when it is retracted.

[0033] Example 3: Before the side support frame 4 is retracted, the movable pedal 3 must be reset to provide space for the side support frame 4 to move. However, the presence of the side support frame 4 can obstruct the worker to some extent. When the movable pedal 3 is long, the worker often has to crawl under the movable pedal 3 to lift it, which is inconvenient for tall or obese workers. This example further optimizes the design based on Example 1: such as... Figure 5-6 As shown, the side guard support frame 4 and the movable pedal 3 are connected by a linkage mechanism 7.

[0034] The linkage mechanism 7 includes a worm gear 71, a turbine 72 that interacts with the worm gear 71, a turbine shaft 73 for mounting the turbine 72 and coaxially connected to the rotation center axis of the movable pedal 3, a gear shaft 74 mounted on the guardrail 2 and parallel to the worm gear 71, and a pair of gears 75 meshing with each other on the gear shaft 74 and the worm gear 71. The horizontal support beam 44 is fixed with a hinge shaft 441 that cooperates with and connects to the fixed support rod 41. The gear shaft 74 is coaxially connected to the hinge shaft 441, and a handle 76 located directly above the platform pedal 1 is connected to the gear shaft 74.

[0035] By operating the handle, the gear shaft 74 rotates. On one hand, the gear shaft 74 rotates the horizontal support beam 44 via the hinge shaft 441, causing the side support frame 4 to retract or open. On the other hand, the gear shaft 74 rotates the movable pedal 3 via a pair of gears 75, a worm gear 71, a turbine 72, and a turbine shaft 73, causing the movable pedal 3 to stand upright or lie flat. In other words, the side support frame 4 and the movable pedal 3 can be operated simultaneously via the handle 76, making the aerial work platform more convenient to use. Furthermore, the handle is positioned directly above the platform pedal 1, providing a suitable operating position and further enhancing ease of operation. Alternatively, the worker can directly apply a rotational force to the horizontal support beam 44, causing the side support frame 4 to retract or open. During this process, the hinge shaft 441 rotates, and the gear shaft 74 also rotates simultaneously. The gear shaft 74 rotates the movable pedal 3 via a pair of gears 75, a worm gear 71, a turbine 72, and a turbine shaft 73, causing the movable pedal 3 to stand upright or lie flat.

[0036] Example 4: Based on Example 2, the design is optimized by adding the linkage mechanism 7 from Example 3.

Claims

1. A height-adjustable and safe and stable aerial work platform, comprising a platform footboard (1), guardrails (2) surrounding the platform footboard (1), and a movable footboard (3) mounted on the guardrails (2), wherein one end of the movable footboard (3) is hinged to the guardrails (2), and the other end can be rotated up and down relative to the guardrails (2), characterized in that, The movable pedal (3) has a retractable and openable side support frame (4) on the free end opposite to the hinge end. The side support frame (4) includes a fixed support rod (41), a movable support rod (42), a horizontal stop rod (43), and a horizontal support beam (44) forming a parallelogram-shaped frame. The horizontal stop rod (43) and the horizontal support beam (44) are both located between the fixed support rod (41) and the movable support rod (42). The two ends of the horizontal stop rod (43) are respectively connected to the fixed support rod (41) and the movable support rod (42). The two ends of the horizontal support beam (44) are respectively hinged to the fixed support rod (41) and the movable support rod (42). The horizontal support beam (44) is located below the horizontal stop rod (43) and protrudes from the horizontal stop rod (43) in the direction facing the movable pedal (3) so as to support the movable pedal (3) which is flipped to a horizontal state when the side stop support frame (4) is opened. The horizontal stop rod (43) moves to the position above the outside of the movable pedal (3) which is flipped to a horizontal state when the side stop support frame (4) is opened. The side support frame (4) and the movable pedal (3) are connected by a linkage mechanism (7) so that the worker can simultaneously operate the side support frame (4) and the movable pedal (3) from the side of the side support frame (4).

2. The height adjustable and safe stable aerial work platform according to claim 1, characterized in that, It also includes a fixing component for vertically fixing the side support frame (4) in the retracted state to the guardrail (2); the fixing component includes at least one pair of magnets (5) respectively disposed between the side support frame (4) and the guardrail (2) and mutually attractive.

3. The height adjustable and safe stable aerial work platform according to claim 1, characterized in that, It also includes a fixing component two for vertically fixing the movable pedal (3) to the guardrail (2); the fixing component two includes at least a pair of magnets (6) disposed between the movable pedal (3) and the guardrail (2) and capable of attracting each other.

4. The height adjustable and safe and stable aerial work platform according to claim 1, characterized in that, The platform tread (1) is provided with a support component for vertically supporting the horizontal support beam (44).

5. The height adjustable and safe stable aerial work platform according to claim 4, characterized in that, The support assembly includes two support columns (1-1), which are located at the two side ends of the horizontal support beam (44).

6. The height adjustable and safe and stable aerial work platform according to claim 1, characterized in that, The platform pedal (1) is provided with a second support column (1-2) that supports the movable support rod (42) when the side support frame (4) is opened.

7. The height adjustable and safe and stable aerial work platform according to claim 1, characterized in that, A step plate (45) is provided between the fixed support rod (41) and the movable support rod (42), located below the horizontal support beam (44) and parallel to the horizontal support beam (44). The two ends of the step plate (45) are respectively hinged to the fixed support rod (41) and the movable support rod (42).

8. The height adjustable and safe and stable aerial work platform according to claim 1, characterized in that, The linkage mechanism (7) includes a worm (71), a turbine (72) that interacts with the worm (71), a turbine shaft (73) for mounting the turbine (72) and coaxially connected to the rotation center axis of the movable pedal (3), a gear shaft (74) that is parallel to the worm (71) and mounted on the guardrail (2), a pair of gears (75) that mesh with each other on the gear shaft (74) and the worm (71), a horizontal support beam (44) is fixed with a hinge shaft (441) that is connected to the fixed support rod (41), the gear shaft (74) is coaxially connected to the hinge shaft (441), and a handle (76) located directly above the platform pedal (1) is connected to the gear shaft (74).

9. The height adjustable and safe and stable aerial work platform according to claim 1, characterized in that, The guardrail (2) is provided with at least two layers, inner and outer, and at least one layer of guardrail (2) can be extended and retracted vertically to adjust the distance between the top of the guardrail (2) and the platform step (1); The guardrail (2) includes an outer guardrail and an inner guardrail. The outer guardrail is fixedly installed on the platform footboard (1). The inner guardrail is located inside the outer guardrail and can extend and retract vertically. The inner guardrail includes a vertical bar (221) and a horizontal bar (222). The vertical bar (221) is a telescopic structure, comprising at least two relatively movable rods. The vertical bar (221) is vertically fixed to the platform footboard (1). The horizontal bar (222) is fixedly connected to the upper end of the vertical bar (221) and moves up and down by telescoping the vertical bar (221). The vertical bar (221) is provided with a positioning component (223) for controlling the telescoping length of the vertical bar (221). The positioning component (223) includes a positioning pin and a positioning hole. The positioning pin is movably installed on one of the rods, and the positioning hole is located on the other rod.

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