Aerial work platform jacking height limiting device and aerial work platform

Abstract

The utility model discloses a kind of aerial work working platform jacking height limiting device and aerial work working platform, it includes platform body (4) and the guardrail (5) installed in platform body four around, vertical installation anti-collision pole (2) on the guardrail, install opposite emission grating sensor on the anti-collision pole, the opposite emission grating sensor includes receiver and transmitter, the receiver and transmitter are oppositely arranged, and the grating of the opposite emission grating sensor covers the top surface of the platform body;The output signal of the opposite emission grating sensor is accessed in the control system of the platform body.The utility model can comprehensively detect the possible obstacles affecting the safety of construction personnel and equipment on the top of platform body.

Description

Technical Field

[0001] This utility model relates to high-altitude work equipment, specifically to a lifting height limiting device for a high-altitude work platform and a high-altitude work platform. Background Technology

[0002] Aerial work platforms are commonly used mechanical equipment for construction workers performing tasks at heights. The safety of aerial work platforms is directly related to the lives of construction workers.

[0003] When working on an aerial work platform, workers often approach or enter areas with height restrictions. Typically, workers rely on their experience or intuition to determine whether they can enter the work area and whether they can continue to raise the platform. However, because workers have limited visibility, it is difficult to accurately judge the height of all obstacles. Or, due to a lack of experience, workers may underestimate the height conditions, which can easily lead to collision accidents when the aerial work platform is operating near areas with height restrictions.

[0004] Chinese patent CN204999576U discloses a top anti-collision device for aerial work platforms. This device uses vertically installed anti-collision bars on the guardrail for top collision safety protection. Once the anti-collision bars detect an obstacle above, the operator of the aerial work platform immediately cuts off the platform's lifting power, stopping the platform's ascent. However, this structure can only detect obstacles located at the guardrail position, and cannot detect obstacles inside the guardrail. In other words, the existing technology cannot perform comprehensive detection of obstacles above the guardrail, which still easily leads to accidents due to variations in the lifting height of the aerial work platform. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of existing anti-collision devices on the top of aerial work platforms. This utility model provides an aerial work platform lifting height limiting device and an aerial work platform that can comprehensively detect obstacles on the top of the operating space of the aerial work platform that may affect the safety of construction personnel and equipment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A lifting height limiting device for an aerial work platform includes a platform body and protective railings installed around the platform body, wherein anti-collision bars are vertically installed on the protective railings. Its structural features are as follows: A through-beam grating sensor is installed on the anti-collision bar. The through-beam grating sensor includes a receiver and a transmitter, which are arranged opposite to each other, and the grating of the through-beam grating sensor covers the top surface of the platform. The output signal of the through-beam grating sensor is connected to the control system of the platform.

[0007] This invention involves vertically installing anti-collision bars on the guardrail, with through-beam optical sensors mounted on these bars. The optical grating of the through-beam sensors covers the top surface of the platform. When an obstacle appears above the anti-collision bar, it will collide with the bar. Upon receiving this information, the operator can cut off the platform's lifting power, stopping the platform's ascent and ensuring the safety of workers and equipment. When an obstacle is within the coverage area of ​​the through-beam optical sensor (i.e., within the guardrail enclosure), the obstacle will trigger the sensor. The sensor outputs a signal to the platform's control system, which then issues an alarm signal and cuts off the platform's lifting power, stopping the platform's ascent and ensuring the safety of workers and equipment. In this way, this invention can comprehensively detect obstacles above the operating space of the aerial work platform that may affect the safety of workers and equipment, and implement corresponding restrictions on platform lifting operations to ensure the safety of workers and equipment.

[0008] A further improvement to the above solution is that the anti-collision bar is installed at the same height as the through-beam grating sensor.

[0009] A further improvement to the above solution is that the anti-collision bars are installed at the four corners of the guardrail, the receiver is installed between the two anti-collision bars at one end of the guardrail, and the transmitter is installed between the two anti-collision bars at the other end of the guardrail.

[0010] A further improvement to the above solution is that the anti-collision bar includes a fixed bar and a movable bar. The fixed bar is fixedly connected to the guardrail, the movable bar is installed on the fixed bar, and a spring is installed between the movable bar and the fixed bar. A contact block is provided on the movable bar, and a limit switch is installed on the fixed bar corresponding to the contact block. The output signal of the limit switch is connected to the control system of the platform body.

[0011] Based on the same inventive concept, this utility model also provides a high-altitude work platform, which includes the aforementioned high-altitude work platform lifting height limiting device.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1) This utility model can use anti-collision bars and through-beam grating sensors to comprehensively detect obstacles on the top of the operating space of the high-altitude work platform that may affect the safety of construction personnel and equipment, and perform corresponding restrictions on the lifting operation of the platform to ensure the safety of construction personnel and equipment.

[0013] 2) The anti-collision bar of this utility model is a telescopic bar and is equipped with a limit switch. When an obstacle comes into contact with the anti-collision bar, the moving rod of the anti-collision bar moves downward and triggers the limit switch. Since the limit switch is connected to the platform control system, the platform control system can cut off the platform's upward power and stop the platform from lifting, thus ensuring the safety of construction personnel and equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a control flowchart of an embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1 , Figure 2An embodiment of the high-altitude work platform lifting height limiting device of this utility model includes a platform body 4 and a protective railing 5 installed around the platform body 4, with anti-collision bars 2 vertically installed at the four corners of the protective railing 5.

[0021] The anti-collision bar 2 includes a fixed bar 21 and a movable bar 22. The fixed bar 21 is fixedly connected to the guardrail 5. The movable bar 22 is mounted on the fixed bar 21, and a spring (not shown in the figure) is installed between the movable bar 22 and the fixed bar 21. A contact block 6 is provided on the movable bar 22, and a limit switch 3 is installed on the fixed bar 21 corresponding to the contact block 6. The output signal of the limit switch 3 is connected to the control system of the platform body 4. The limit switch 3 is preferably a commercially available travel switch.

[0022] Through-beam grating sensors 1 are installed on the anti-collision bars 2 at both ends of the guardrail 5. The through-beam grating sensor 1 includes a receiver 11 and a transmitter 12. The receiver 11 and the transmitter 12 are arranged opposite to each other, and the grating 13 of the through-beam grating sensor 1 covers the top surface of the platform body 4. The output signal of the through-beam grating sensor 1 is also connected to the control system of the platform body 4.

[0023] To ensure that the height limit is the same at all positions of the platform body 4, the anti-collision rod 2 is installed at the same height as the through-beam grating sensor 1.

[0024] In this embodiment, the receiver 11 is installed between the two anti-collision bars 2 at one end of the guardrail 5, and the transmitter 12 is installed between the two anti-collision bars 2 at the other end of the guardrail 5.

[0025] One embodiment of the aerial work platform of this utility model includes the aforementioned aerial work platform lifting height limiting device.

[0026] In use, when an obstacle appears above the anti-collision bar 2, the obstacle presses down the moving rod 22 of the anti-collision bar 2. The contact block 6 on the moving rod 22 abuts against the limit switch 3, triggering the limit switch 3. After receiving the trigger signal from the limit switch 3, the control system of the platform body 4 issues an alarm and cuts off the upward power of the platform body 4, causing the platform body 4 to move upward. When the obstacle presses down on the through-beam optical sensor 1, since the through-beam optical sensor 1 is rigidly connected to the moving rod 22 of the anti-collision bar 2, the through-beam optical sensor 1 is linked to the moving rod 22 of the anti-collision bar 2. The limit switch 3 is triggered. After receiving the trigger signal from the limit switch 3, the control system of the platform body 4 issues an alarm and cuts off the upward power of the platform body 4, limiting the upward movement of the platform body 4. When the obstacle is within the grating coverage area of ​​the through-beam grating sensor 1, that is, within the area enclosed by the guardrail 5, the obstacle will trigger the through-beam grating sensor 1. After receiving the output signal from the through-beam grating sensor 1, the control system of the platform body 4 issues an alarm and cuts off the upward power of the platform body 4, limiting the upward movement of the platform body 4, that is, stopping the lifting of the platform body 4.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model should fall within the protection scope of the technical solution of this utility model.

Claims

1. A lifting height limiting device for an aerial work platform, comprising a platform body (4) and protective railings (5) installed around the platform body, wherein anti-collision bars (2) are vertically installed on the protective railings, characterized in that: A through-beam grating sensor (1) is installed on the anti-collision bar. The through-beam grating sensor includes a receiver (11) and a transmitter (12). The receiver and transmitter are arranged opposite to each other, and the grating of the through-beam grating sensor covers the top surface of the platform. The output signal of the through-beam grating sensor is connected to the control system of the platform.

2. The lifting height limiting device for a high-altitude work platform according to claim 1, characterized in that, The anti-collision bar is installed at the same height as the through-beam grating sensor.

3. The lifting height limiting device for a high-altitude work platform according to claim 1, characterized in that, The guardrail is equipped with anti-collision bars at its four corners, the receiver is installed between the two anti-collision bars at one end of the guardrail, and the transmitter is installed between the two anti-collision bars at the other end of the guardrail.

4. The lifting height limiting device for a high-altitude work platform according to claim 1, characterized in that, The anti-collision bar includes a fixed bar (21) and a movable bar (22). The fixed bar is fixedly connected to the guardrail. The movable bar is installed on the fixed bar, and a spring is installed between the movable bar and the fixed bar. A contact block (6) is provided on the movable bar. A limit switch (3) is installed on the fixed bar corresponding to the contact block. The output signal of the limit switch is connected to the control system of the platform body.

5. A high-altitude work platform, characterized in that, The device includes the lifting height limiting device for the high-altitude work platform as described in any one of claims 1-4.

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