Telescopic head collision prevention device and aerial work platform

Abstract

The utility model relates to a telescopic head-collision-preventing device which comprises a lifting rod, a limiting sensor, a lifting electromagnetic valve and a driving mechanism used for driving the lifting rod to ascend and descend, the lifting rod is installed on an installation base in an up-down ascending and descending mode, and the installation base is detachably installed on an aerial work platform. The limiting sensor is installed on the top of the lifting rod and used for identifying whether the top of a building is touched. The limiting sensor, the lifting electromagnetic valve and the driving mechanism are connected through telecommunication signals; when the limiting sensor touches the top of the building, the limiting sensor sends an obtained touch signal to the lifting electromagnetic valve, and the lifting electromagnetic valve stops supplying power to the driving mechanism after obtaining the signal so that the aerial work platform can stop at the current position. The device is high in automation degree, lifting operation of the anti-collision head device can be automatically achieved, the personal safety of workers is effectively protected, and meanwhile damage to the anti-collision head device can be reduced. The aerial work platform also has the advantage of protecting the personal safety of workers.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically a retractable anti-collision device and an aerial work platform. Background Technology

[0002] Aerial work platforms are mobile pieces of equipment widely used in various fields such as construction, power, communications, and transportation for high-altitude operations, equipment installation, and maintenance. Due to their efficiency, safety, and flexibility, aerial work platforms have gradually replaced traditional mobile scaffolding and suspended platforms, becoming an essential tool in the field of high-altitude operations.

[0003] Aerial work platforms can be classified into scissor lifts, boom lifts, and mast lifts based on their extension mechanisms. During lifting operations, improper operation or negligence by workers can lead to collisions between workers' heads and the construction site ceiling, or between the aerial work platform and the construction site ceiling, posing a safety hazard to workers and impacting the user experience.

[0004] To address the aforementioned technical problems, Chinese utility model patent application number 201520664360.1 discloses a top anti-collision device for aerial work platforms. The aerial work platform includes a platform body, and the top anti-collision device includes a fixing device and an anti-collision bar. The fixing device is fixed to one side of the platform body, and the anti-collision bar is vertically installed on the platform body through a movable connection with the fixing device. When the anti-collision bar is in its highest position, its top is higher than the head of the worker inside the platform body. This effectively improves the safety factor for workers when the aerial work platform enters areas with height restrictions, preventing collisions caused by insufficient estimation of height conditions. However, the aforementioned anti-collision device has a low degree of automation during use, usually requiring manual operation by the user. This can lead to situations where adjustments are forgotten, thus still posing safety hazards, affecting the user experience, and hindering the promotion and application of the aforementioned top anti-collision device on aerial work platforms. Utility Model Content

[0005] To overcome the shortcomings of the prior art, the first objective of this utility model is to provide a retractable anti-collision head-mounted device. This device has an ingenious structure and a high degree of automation, enabling automatic raising and lowering of the anti-collision head-mounted device. This effectively protects the personal safety of workers while reducing damage to the anti-collision head-mounted device itself, ensuring its service life, and reducing operating costs. This facilitates the promotion and application of the retractable anti-collision head-mounted device on aerial work platforms. The second objective of this utility model is to provide an aerial work platform that, by applying the aforementioned retractable anti-collision head-mounted device, also possesses the advantages of a high degree of automation, automatically raising and lowering the anti-collision head-mounted device, effectively protecting the personal safety of workers while reducing damage to the anti-collision head-mounted device itself.

[0006] The aforementioned retractable head-collision prevention device and the aforementioned aerial work platform are technically related and belong to the same utility model concept.

[0007] To achieve the first objective of this utility model, the present utility model adopts the following technical solution: a retractable anti-collision device for installation on an aerial work platform; the retractable anti-collision device includes a lifting rod, a limit sensor, a lifting solenoid valve, and a drive mechanism for driving the lifting rod to rise and fall; the lifting rod is mounted vertically on a mounting base, which is detachably mounted on the aerial work platform; the limit sensor is installed on the top of the lifting rod to identify whether it has collided with the top of a building; the limit sensor, the lifting solenoid valve, and the drive mechanism are connected via telecommunication signals; when the limit sensor collidees with the top of a building, the limit sensor sends the obtained collision signal to the lifting solenoid valve, and the lifting solenoid valve, upon receiving the signal, stops supplying power to the drive mechanism, causing the aerial work platform to stop at its current position.

[0008] As a preferred embodiment of this utility model, a mounting plate is detachably installed at the top of the lifting rod. The mounting plate has a mounting position for installing the limit sensor. The limit sensor is detachably installed at the mounting position, and the top of the limit sensor is located at a height higher than the top of the mounting plate.

[0009] In a preferred embodiment of this utility model, the limit sensor is installed at an angle on the mounting plate, and the mounting plate and the limit sensor are set at an angle.

[0010] As a preferred embodiment of this utility model, the angle ranges from 10° to 45°.

[0011] As a preferred embodiment of this utility model, the aerial work platform includes a platform body and a fence. The fence is arranged around the platform body, and the mounting base is detachably installed on the top of the fence. The distance between the top of the fence and the platform body is adapted to the height of the lifting rod.

[0012] In a preferred embodiment of the present invention, the mounting base includes a mounting part and a connecting part. The mounting part is used to fit snugly against the fence. The connecting part is formed on the side of the mounting part and has a sliding hole at the top for the lifting rod to pass through. In a preferred embodiment of the present invention, the lifting rod is a round rod and the sliding hole is a round hole with an inner diameter slightly larger than the outer diameter of the lifting rod.

[0013] As a preferred embodiment of this utility model, the side of the connecting part also has an abutment hole for the abutment member to pass through, and the abutment hole is arranged perpendicularly to the sliding hole.

[0014] In a preferred embodiment of this utility model, the limit sensor is a limit switch.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model provides a retractable anti-collision head-raising device. This device comprises a lifting rod, a limit sensor, a lifting solenoid valve, and a drive mechanism for raising and lowering the lifting rod. The limit sensor is installed at the top of the lifting rod to detect whether it has collided with the top of a building. When the limit sensor contacts the top of the building, it sends a collision signal to the lifting solenoid valve. Upon receiving the signal, the lifting solenoid valve stops supplying power to the drive mechanism, stopping the aerial work platform in its current position. This prevents the worker's head from colliding with the top of the building, ensuring the worker's safety during work. This device has an ingenious structure and a high degree of automation. It can automatically raise and lower the anti-collision head-raising device, effectively protecting the worker's personal safety while reducing damage to the device itself, ensuring its service life, and lowering operating costs. This facilitates the promotion and application of the retractable anti-collision head-raising device on aerial work platforms.

[0016] To achieve the second utility model objective mentioned above, this utility model adopts the following technical solution: a scissor lift aerial work platform, which utilizes the aforementioned retractable anti-collision device; the retractable anti-collision device comprises multiple devices, which are respectively installed on the top of the fence; when the limit sensor of one of the retractable anti-collision devices touches the top of the building, the aerial work platform stops lifting.

[0017] Compared with the prior art, the beneficial effects of this utility model are: a high-altitude work platform, by applying the above-mentioned retractable anti-collision device, also has the advantage of ensuring the safety of workers during use. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a retractable anti-collision head device in one embodiment;

[0019] Figure 2 This is a schematic diagram of the mounting base in the embodiment;

[0020] Figure 3 This is a schematic diagram of the retractable anti-collision head device being installed on the aerial work platform in the embodiment.

[0021] Figure 4 This is a schematic diagram of the retractable anti-collision device installed on the aerial work platform in the embodiment.

[0022] Reference numerals in the attached drawings: 1. Lifting rod; 2. Limit sensor; 3. Mounting base; 3-1. Sliding hole; 3-2. Mounting part; 3-3. Connecting part; 3-4. Abutment hole; 4. Mounting plate; 4-1. Mounting position; 5. Aerial work platform; 5-1. Platform body; 5-2. Fence; 6. Abutment piece; 7. Connecting piece; a. Angle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] Existing anti-collision devices have a low degree of automation during use and usually require manual operation by the user. It is inevitable that adjustments will be forgotten, thus posing safety hazards, affecting the user experience, and hindering the promotion and application of the aforementioned top anti-collision devices on aerial work platforms.

[0027] Example: To solve the above-mentioned technical problems, such as Figures 1 to 4 As shown in this embodiment, a retractable head-collision prevention device is mainly installed on an aerial work platform 5 to prevent workers' heads from colliding with the top of the construction building during work, thereby preventing safety accidents. To automate the operation of this device, it is activated during the lifting process of the aerial work platform, eliminating the need for manual operation by workers and significantly reducing the probability of accidents caused by workers forgetting to operate it. The retractable head-collision prevention device in this embodiment mainly consists of a lifting rod 1, a limit sensor 2, a lifting solenoid valve, and a drive mechanism for driving the lifting rod 1 to rise and fall. The lifting rod 1 is mounted vertically on a mounting base 3 to ensure its stability during lifting and reducing the probability of swaying, thus ensuring that the limit sensor 2 can accurately detect whether it is in contact with the top of the building. To facilitate future inspection, maintenance, and replacement of the aforementioned device, in this embodiment, the retractable anti-collision device is detachably installed on the aerial work platform 5. Specifically, the mounting base 3 is detachably installed on the aerial work platform 5, and the limit sensor 2 is installed on the top of the lifting rod 1 to accurately identify whether the lifting rod 1 touches the top of the building. The limit sensor 2, the lifting solenoid valve, and the drive mechanism are connected via telecommunication signals. When the limit sensor 2 touches the top of the building, it sends a contact signal to the lifting solenoid valve. Upon receiving the signal, the lifting solenoid valve stops supplying power to the drive mechanism, stopping the aerial work platform 5 in its current position, thereby preventing over-lifting of the aerial work platform and protecting the safety of the workers. When the lifting rod 2 is at its highest position, its top is higher than the head of the workers inside the aerial work platform 5.

[0028] To ensure the stability of the limit sensor 2 during installation and use, a mounting plate 4 is detachably installed at the top of the lifting rod 1 in this embodiment. This is achieved by creating mounting holes in both the lifting rod 1 and the mounting plate 4, and inserting locking bolts or other connecting components through these holes. Furthermore, to reduce complexity and ensure the stability of the mounting plate 4 during installation and use, the mounting plate 1 is installed on the side of the lifting rod 1, with the top of the mounting plate 4 protruding beyond the top of the lifting rod 1. This forms a mounting position 4-1, or mounting surface, for the limit sensor 2. The surface of mounting position 4-1 is flat. The limit sensor 2 is detachably installed at mounting position 4-1, with the top of the limit sensor 2 positioned higher than the top of the mounting plate 4. This ensures that the limit sensor 2 makes pre-contact with the top of the building during the lifting of the lifting rod 1, and then promptly sends the received contact signal to the lifting solenoid valve, ensuring safety during use.

[0029] This embodiment solves the problem of potential head collisions between workers and the construction site roof during the lifting of aerial work platforms, effectively improving the safety of aerial work platform use and protecting the personal safety of operators as well as the equipment safety of the aerial work platform.

[0030] like Figure 3 The diagram shows the arrangement of the retractable anti-collision device on the aerial work platform. Anti-collision devices are installed on both sides of the fence 5-2 and are in the raised position. Their placement around the fence 5-2 effectively improves the reliability and safety of the anti-collision device. When the limit sensor 2 of one of the anti-collision devices receives a signal, the aerial work platform 5 stops lifting.

[0031] like Figure 4 The image shows the retracted state of the anti-collision device. When the aerial work platform 5 is not in use for lifting operations, but needs to perform walking, turning, or other operations, the retracted anti-collision device can reduce the space occupied and improve the application scenarios of the aerial work platform.

[0032] In practical use, workers often need to operate on the top of buildings. If the platform body 5-1 of the aerial work platform is too far from the top of the building, it will affect the workers' operation; if the distance is too close, it is easy for the user to collide with the top of the building. That is, the space between the platform body 5-1 and the top of the building is limited. In order to ensure that the anti-collision device in this embodiment can fully meet the user's needs, the limit sensor 2 is installed at an angle on the side of the mounting plate 4, i.e., the mounting position 4-1. The angled installation can effectively utilize the limited space, avoid interference with other components, and avoid false triggering caused by equipment vibration or slight shaking, because the tilt angle can reduce vertical interference. In this embodiment, by installing the limit sensor 2 at an angle, it can detect and stop the equipment operation in time before the aerial work platform reaches the limit position, avoiding collisions or damage to the limit sensor 2 caused by straight up and down impacts. To better adapt to the operational requirements of the aerial work platform 5 and improve the safety, reliability, and operational efficiency of the equipment, in this embodiment, the mounting plate 4 and the limit sensor 2 are set at an angle α, where α is an acute angle, ranging from 10° to 45°, meeting usage requirements while reducing installation difficulty. The specific installation steps for the limit sensor 2 are as follows: S1. Use a protractor to measure a 12° tilt angle at mounting position 4-1 on the side of the mounting plate 4, and mark the installation position with a pencil; S2. Place the limit sensor 2 at the marked position, tilted at a 12° angle; S3. Use screws to fix the limit sensor 2 to the mounting plate 4, ensuring it is secure and the angle is accurate; S4. After wiring, manually test whether the limit sensor 2 can be reliably triggered; S5. When the aerial work platform 5 is running, observe whether the limit sensor 2 can be triggered at the predetermined position to ensure its normal operation.

[0033] The aforementioned aerial work platform 5 mainly consists of a platform body 5-1 and a railing 5-2. The railing 5-2 is installed around the platform body 5-1 to protect workers and prevent them from falling from a height. To facilitate the disassembly of the entire retractable head-blocking device, in this embodiment, the mounting base 3 is detachably installed on top of the railing 5-2 via a connector 7. The railing 5-2 can be formed by bending a pipe, and the connector 7 can be a U-bolt. The railing 5-2 and the mounting base 3 are fixed together using the U-bolt, effectively ensuring the stability of the mounting base 3 during use. The distance between the top of the railing 5-2 and the platform body 5-1 is adapted to the height of the lifting rod 1, so that the lifting rod 1 can be retracted into the railing 5-2 during the retraction process.

[0034] The aforementioned mounting base 3 includes a mounting portion 3-2 and a connecting portion 3-3. The mounting portion 3-2 is fitted to the aforementioned fence 5-2. The connecting portion 3-3 is formed on the side of the mounting portion 3-2 and has a sliding hole 3-1 at its top for the lifting rod 1 to pass through. Under the action of the aforementioned driving mechanism, the lifting rod 1 can be installed vertically within the sliding hole 3-1. The aforementioned driving mechanism can be a drive motor or hydraulic drive, etc., and is installed at the bottom of the lifting rod 1 to drive the lifting rod 1 to rise and fall in the height direction to meet usage requirements. To reduce manufacturing difficulty while ensuring smoothness during the lifting process and reducing resistance during the lifting process, the lifting rod 1 is a round rod, and the sliding hole 3-1 is a round hole, with the inner diameter of the sliding hole 3-1 slightly larger than the outer diameter of the lifting rod 1.

[0035] To further ensure the stability of the lifting rod 1 during use, when the lifting rod 1 does not need to be operated, that is, when the lifting rod 1 does not need to be raised or lowered, the lifting rod 1 can be fixed. Specifically, the side of the connecting part 3-3 also has an abutment hole 3-4 for the abutment member 6 to pass through. The abutment hole 3-4 is set perpendicular to the sliding hole 3-1. The abutment member 6 can be an indexing pin.

[0036] The aforementioned limit sensor 2 can effectively identify limit switches, thereby further ensuring the safety of workers during the work process.

[0037] The retractable anti-collision device in this embodiment can be applied to, but is not limited to, aerial work platforms to ensure the safety of workers during the work process.

[0038] A high-altitude work platform includes the aforementioned retractable anti-collision device; wherein, there are multiple retractable anti-collision devices, which are respectively installed on the top of the fence, and when the limit sensor 1 of one of the retractable anti-collision devices touches the top of the building, the high-altitude work platform stops lifting.

[0039] This embodiment presents a retractable head-collision prevention device. This device comprises a lifting rod 1, a limit sensor 2, a lifting solenoid valve, and a drive mechanism for raising and lowering the lifting rod 1. The limit sensor 2 is installed on the top of the lifting rod 1 to detect whether it has collided with the top of a building. When the limit sensor 2 contacts the top of the building, it sends a collision signal to the lifting solenoid valve. Upon receiving the signal, the lifting solenoid valve stops supplying power to the drive mechanism, stopping the aerial work platform in its current position. This prevents the worker's head from colliding with the building top, ensuring the worker's safety during work. This device has an ingenious structure and a high degree of automation, automatically raising and lowering the head-collision prevention device. It effectively protects the worker's personal safety while reducing damage to the device itself, extending its service life, and lowering operating costs. This facilitates the promotion and application of the retractable head-collision prevention device on aerial work platforms.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this document frequently uses reference numerals from the accompanying drawings: 1. lifting rod; 2. limit sensor; 3. mounting base; 3-1. sliding hole; 3-2. mounting part; 3-3. connecting part; 3-4. abutment hole; 4. mounting plate; 4-1. mounting position; 5. aerial work platform; 5-1. platform body; 5-2. fence; 6. abutment part; 7. connecting part; a. angle, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A retractable head-collision prevention device, characterized in that: For installation on aerial work platform (5); the retractable anti-collision device includes a lifting rod (1), a limit sensor (2), a lifting solenoid valve and a drive mechanism for driving the lifting rod (1) to rise and fall. The lifting rod (1) is installed on the mounting base (3) which can be raised and lowered. The mounting base (3) can be detachably installed on the aerial work platform. The limit sensor (2) is installed on the top of the lifting rod (1) to identify whether it touches the top of the building. The limit sensor (2), the lifting solenoid valve and the drive mechanism are connected by a telecommunication signal. When the limit sensor (2) touches the top of the building, the limit sensor (2) sends the obtained collision signal to the lifting solenoid valve. After receiving the signal, the lifting solenoid valve stops supplying power to the drive mechanism so that the aerial work platform (5) stops at the current position.

2. The retractable anti-collision head device according to claim 1, characterized in that: The lifting rod (1) is detachably mounted with a mounting plate (4) at the top. The mounting plate (4) has a mounting position (4-1) for mounting the limit sensor (2). The limit sensor (2) is detachably mounted at the mounting position (4-1) and the top of the limit sensor (2) is located at a height higher than the top of the mounting plate (4).

3. The retractable anti-collision head device according to claim 2, characterized in that: The limit sensor (2) is installed at an angle on the mounting plate (4), and the mounting plate (4) and the limit sensor (2) are set at an angle (a).

4. A retractable anti-collision head device according to claim 3, characterized in that: The angle (a) is in the range of 10° to 45°.

5. A retractable anti-collision head device according to claim 2, characterized in that: The aerial work platform (5) includes a platform body (5-1) and a fence (5-2). The fence (5-2) is arranged around the platform body (5-1). The mounting base (3) is detachably installed on the top of the fence (5-2). The distance between the top of the fence (5-2) and the platform body (5-1) is adapted to the height of the lifting rod (1).

6. A retractable anti-collision head device according to claim 5, characterized in that: The mounting base (3) includes a mounting part (3-2) and a connecting part (3-3). The mounting part (3-2) is used to fit against the fence (5-2). The connecting part (3-3) is formed on the side of the mounting part (3-2) and has a sliding hole (3-1) on the top for the lifting rod (1) to pass through. Under the action of the driving mechanism, the lifting rod (1) can be installed in the sliding hole (3-1) by moving up and down.

7. A retractable anti-collision head device according to claim 6, characterized in that: The lifting rod (1) is a round rod, and the sliding hole (3-1) is a round hole. The inner diameter of the sliding hole (3-1) is slightly larger than the outer diameter of the lifting rod (1).

8. A retractable anti-collision head device according to claim 7, characterized in that: The side of the connecting part (3-3) also has an abutment hole (3-4) through which the abutment member (6) passes, and the abutment hole (3-4) is arranged perpendicular to the sliding hole (3-1).

9. A retractable anti-collision head device according to claim 1, characterized in that: The limit sensor (2) is a limit switch.

10. A scissor lift aerial work platform, characterized in that: The application includes a retractable anti-collision device as described in any one of claims 1 to 9; there are multiple retractable anti-collision devices, which are respectively installed on the top of the fence. When the limit sensor (2) of one of the retractable anti-collision devices touches the top of the building, the aerial work platform stops lifting.

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