Telescopic head collision prevention device and aerial work platform

Abstract

The telescopic head collision prevention device 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 a vertically 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 effectively protecting the personal safety of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly to a telescopic anti-collision device and an aerial work platform. Background Art

[0002] An aerial work platform is a movable device widely used in aerial work, equipment installation and maintenance in multiple fields such as construction, electricity, communication, and transportation. Due to its high efficiency, safety, and flexibility, the aerial work platform has gradually replaced traditional mobile scaffolding and hanging baskets and has become an important tool in the aerial work field.

[0003] Aerial work platforms can be classified into scissor type, boom type, mast type, etc. according to the extension mechanism. When the existing aerial work platforms perform lifting operations, due to improper operation or negligence of the staff during operation, there may be situations where the head of the staff collides with the top of the construction site, or the aerial work platform collides with the top of the construction site during operation, which endangers the personal safety of the staff and affects the user experience.

[0004] To solve the above technical problems, the Chinese utility model patent with the application number 201520664360.1 discloses an anti-collision device for the top of an aerial work platform. The aerial work platform includes a platform main body. The anti-collision device for the top of the aerial work platform includes a fixing device and an anti-collision rod. The fixing device is fixed on one side of the platform main body, and the anti-collision rod is vertically installed on the platform main body through a movable connection with the fixing device. When the anti-collision rod is in the highest position, its top is higher than the top of the head of the staff inside the platform main body. It effectively improves the safety factor of the staff when the aerial work platform enters an area with height restrictions and prevents the occurrence of collision accidents caused by the staff's insufficient estimation of the height situation. However, the above anti-collision device has a low degree of automation during use and usually requires manual operation by the user, so it is inevitable that the situation of forgetting to adjust will occur. Therefore, there are still safety hazards, which affect the user experience and are not conducive to the popularization and application of the above anti-collision device on the aerial work platform. Summary of the Invention

[0005] In order to overcome the above-mentioned defects in the prior art, the first object of the present invention is to provide a retractable anti-collision head device. This device has a clever structure and a high degree of automation, and can automatically realize the lifting operation of the anti-collision head device. While effectively protecting the personal safety of the staff, it can also reduce the damage to the anti-collision head device itself, ensure its service life, reduce the use cost, and is conducive to the popularization and application of the above-mentioned retractable anti-collision head device on the aerial work platform. The second object of the present invention is to provide an aerial work platform. By applying the above-mentioned retractable anti-collision head device, it also has the advantages of high automation, can automatically realize the lifting operation of the anti-collision head device, and can effectively protect the personal safety of the staff while reducing the damage to the anti-collision head device itself.

[0006] The above-mentioned retractable anti-collision head device and the above-mentioned aerial work platform are technically interrelated and belong to the same inventive concept.

[0007] In order to achieve the above first object of the invention, the present invention adopts the following technical solutions: A retractable anti-collision head device for installation on an aerial work platform; the retractable anti-collision head device includes a lifting rod, a limit sensor, a lifting solenoid valve and a driving mechanism for driving the lifting of the lifting rod. The lifting rod is installed on the mounting seat so as to be able to move up and down. The mounting seat is detachably installed on the aerial work platform. The limit sensor is installed at the top of the lifting rod to identify whether it touches the top of the building; the limit sensor, the lifting solenoid valve and the driving mechanism are connected by telecommunication signals; when the limit sensor touches the top of the building, the limit sensor sends the obtained touch signal to the lifting solenoid valve, and after the lifting solenoid valve obtains the signal, it stops supplying power to the driving mechanism to make the aerial work platform stop at the current position.

[0008] As a preferred solution of the present invention, 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] As a preferred solution of the present invention, the limit sensor is inclinedly installed on the mounting plate, and an angle is formed between the mounting plate and the limit sensor.

[0010] As a preferred solution of the present invention, the range of the angle is 10° to 45°.

[0011] As a preferred embodiment of the present invention, the aerial work platform includes a platform main body and a fence. The fence is arranged around the platform main body. The mounting seat is detachably mounted on the top of the fence, and the distance between the top of the fence and the platform main body is adapted to the height of the lifting rod.

[0012] As a preferred embodiment of the present invention, the mounting seat includes a mounting portion and a connecting portion. The mounting portion is used for being attached to the fence. The connecting portion is formed on the side of the mounting portion and has a sliding hole at the top for the lifting rod to pass through. As a preferred embodiment of the present invention, the lifting rod is a round rod, the sliding hole is a round hole, and the inner diameter of the sliding hole is slightly larger than the outer diameter of the lifting rod.

[0013] As a preferred embodiment of the present invention, the side of the connecting portion also has a butting hole for a butting member to pass through, and the butting hole is perpendicular to the sliding hole.

[0014] As a preferred embodiment of the present invention, the limit sensor is a limit switch.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: A retractable anti-collision head device in the present invention. The retractable anti-collision head device is provided with a lifting rod, a limit sensor, a lifting solenoid valve and a driving mechanism for driving the lifting of the lifting rod. The limit sensor is installed at the top of the lifting rod to identify whether it touches the top of the building. When the limit sensor touches the top of the building, the limit sensor sends the obtained touch signal to the lifting solenoid valve. After the lifting solenoid valve obtains the signal, it stops supplying power to the driving mechanism to make the aerial work platform stop at the current position, thereby avoiding the collision between the heads of the staff and the top of the building and ensuring the safety of the staff during the work process. The device has a clever structure and a high degree of automation. It can automatically realize the lifting operation of the anti-collision head device, effectively protect the personal safety of the staff, reduce the damage to the anti-collision head device itself, ensure its service life, reduce the use cost, and is conducive to the popularization and application of the above retractable anti-collision head device on the aerial work platform.

[0016] In order to achieve the above second invention object, the present invention adopts the following technical solution: A scissor-type aerial work platform, by applying the above retractable anti-collision head device; there are multiple retractable anti-collision head devices, and the multiple retractable anti-collision head devices are respectively installed on the top of the fence. When the limit sensor of one of the retractable anti-collision head devices touches the top of the building, the aerial work platform stops lifting.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: An aerial work platform, by applying the above retractable anti-collision head device, also has the advantage of being able to ensure the safety of the staff during the use process. Brief Description of the Drawings

[0018] Figure 1 Fig. is a schematic structural diagram of a retractable anti-collision device for preventing head bumps in an embodiment; Figure 2 Fig. is a schematic structural diagram of a mounting base in an embodiment; Figure 3 Fig. is a schematic diagram of the retractable anti-collision device for preventing head bumps mounted on an aerial work platform being raised in an embodiment; Figure 4 Fig. is a schematic diagram of the retractable anti-collision device for preventing head bumps mounted on an aerial work platform being retracted in an embodiment.

[0019] Reference Numerals: 1, lifting rod; 2, limit sensor; 3, mounting base; 3-1, sliding hole; 3-2, mounting portion; 3-3, connecting portion; 3-4, abutting hole; 4, mounting plate; 4-1, mounting position; 5, aerial work platform; 5-1, platform main body; 5-2, railing; 6, abutting member; 7, connecting member; a, angle. Detailed Embodiment

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and do not limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0022] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0023] In the prior art, the anti-collision device has a low degree of automation during use and usually requires manual operation by the user, so it is inevitable that the situation of forgetting to adjust occurs. Therefore, there are still potential safety hazards, which affect the user experience and are not conducive to the popularization and application of the above-mentioned top anti-collision device on the aerial work platform.

[0024] Embodiment: To solve the above technical problems, as Figures 1 to 4As shown in the figure, a telescopic anti-collision device in this embodiment is mainly used to be installed on an aerial work platform 5, aiming to prevent collisions between the heads of workers and the top of the construction building during the work process, thereby triggering safety accidents. In order to achieve the automatic operation of the device, that is, to start the above-mentioned device during the lifting process of the aerial work platform, without the need for workers to manually operate it, which can greatly reduce the probability of accidents caused by workers forgetting to operate. The above-mentioned telescopic anti-collision device in this embodiment mainly consists of a lifting rod 1, a limit sensor 2, a lifting solenoid valve, and a driving mechanism for driving the lifting of the above-mentioned lifting rod 1. The above-mentioned lifting rod 1 is installed on the mounting seat 3 so as to be able to move up and down, mainly to ensure the stability of the lifting rod 1 during the lifting process and reduce the probability of its shaking, so as to ensure that the limit sensor 2 can accurately identify whether it contacts the top of the building. In order to facilitate the later maintenance, repair, and replacement of the above-mentioned device, in this embodiment, the above-mentioned telescopic anti-collision device is detachably installed on the above-mentioned aerial work platform 5. Specifically, the above-mentioned mounting seat 3 is detachably installed on the aerial work platform 5, and the above-mentioned limit sensor 2 is installed on the top of the above-mentioned lifting rod 1 to accurately identify whether the lifting rod 1 touches the top of the building. The above-mentioned limit sensor 2, the above-mentioned lifting solenoid valve, and the above-mentioned driving mechanism are connected by telecommunication signals. When the above-mentioned limit sensor 2 touches the top of the building, the above-mentioned limit sensor 2 sends the obtained touch signal to the above-mentioned lifting solenoid valve. After the above-mentioned lifting solenoid valve obtains the signal, it stops supplying power to the above-mentioned driving mechanism, so that the above-mentioned aerial work platform 5 stops at the current position, thereby avoiding excessive lifting of the aerial work platform and protecting the safety of workers. When the above-mentioned lifting rod 2 is in the highest position, its top is higher than the heads of the workers inside the aerial work platform 5.

[0025] In order to ensure the stability of the above-mentioned limit sensor 2 during installation and use, in this embodiment, a mounting plate 4 is detachably installed at the top of the above-mentioned lifting rod 1. The detachable installation between the above-mentioned lifting rod 1 and the mounting plate 4 is achieved by opening mounting holes in the lifting rod 1 and the mounting plate 4 and passing through connecting parts such as locking bolts in the mounting holes. Further, in order to reduce the difficulty and at the same time ensure the stability of the mounting plate 4 during installation and use, the mounting plate 1 is installed on the side of the above-mentioned lifting rod 1, and the top of the mounting plate 4 protrudes above the top of the above-mentioned lifting rod 1, so that the above-mentioned mounting plate 4 forms a mounting position 4-1 or a mounting surface for the above-mentioned limit sensor 2 to be installed. The surface of the above-mentioned mounting position 4-1 is a plane. The above-mentioned limit sensor 2 is detachably installed at the above-mentioned mounting position 4-1, and the height of the top of the above-mentioned limit sensor 2 is higher than the height of the top of the above-mentioned mounting plate 4, so as to realize that the above-mentioned limit touch sensor 2 contacts the top of the building in advance during the lifting process of the lifting rod 1 and then timely sends the obtained touch signal to the above-mentioned lifting solenoid valve to ensure safety during use.

[0026] This embodiment solves the problem that the head of the staff or the working platform may collide with the top of the construction site when the aerial work platform is lifted, effectively improving the safety of the aerial work platform, protecting the personal safety of the operator and the equipment safety of the aerial work platform.

[0027] As Figure 3 shown, it is a layout schematic diagram of the retractable anti-collision device for the aerial work platform. Anti-collision devices are installed on both sides of the fence 5-2 and are in the raised state. Arranging them around the fence 5-2 can effectively improve the reliability and safety of the anti-collision device. When the limit sensor 2 of one of the anti-collision devices obtains a signal, the aerial work platform 5 stops lifting.

[0028] As Figure 4 shown is the retracted state of the anti-collision device. When the aerial work platform 5 does not need to perform the lifting action and needs to perform operations such as walking and turning, the anti-collision device in the retracted state can reduce the space occupation and improve the application scenarios of the aerial work platform.

[0029] In the actual use process, since the staff often need to operate on the top of the building, if the distance between the platform main body 5-1 in the aerial work platform and the top of the building is too far, it will affect the operation of the staff; 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 main body 5-1 and the top of the building is limited. In order to enable the anti-collision device in this embodiment to fully meet the user's usage requirements, in this embodiment, the above-mentioned limit sensor 2 is installed obliquely on the side of the above-mentioned mounting plate 4, that is, at the mounting position 4-1. The oblique installation can effectively utilize the limited space, avoid interference with other components, and the oblique installation can avoid false triggering caused by equipment vibration or slight shaking, because the oblique angle can reduce the interference in the vertical direction. In this embodiment, by installing the above-mentioned limit sensor 2 obliquely, it can detect in time and stop the operation of the equipment before the aerial work platform reaches the limit position, avoiding the collision or damage to the above-mentioned limit sensor 2 caused by the straight up and down impact. In order to better meet the operation requirements of the aerial work platform 5 and improve the safety, reliability and operation efficiency of the equipment, in this embodiment, an angle a is set between the above-mentioned mounting plate 4 and the above-mentioned limit sensor 2, and the angle a is an acute angle, which can be 10° to 45°, reducing the installation difficulty while meeting the usage requirements. The specific installation steps of the above-mentioned limit sensor 2 are as follows: S1. Use a protractor to measure a 12° oblique angle at the 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 and place it obliquely at an angle of 12°; S3. Use screws to fix the limit sensor 2 on the mounting plate 4 to ensure its firmness and accurate angle; S4. After the wiring is completed, 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.

[0030] The above-mentioned aerial work platform 5 is mainly composed of a platform main body 5-1 and a fence 5-2. The above-mentioned fence 5-2 is arranged along a circle of the above-mentioned platform main body 5-1 to protect the staff and prevent the staff from falling from a height. In order to realize the disassembly of the entire telescopic anti-collision device, in this embodiment, the above-mentioned mounting seat 3 is detachably installed on the top of the above-mentioned fence 5-2 through a connecting piece 7. The fence 5-2 can be formed by bending a bent pipe. The above-mentioned connecting piece 7 can be a U-shaped bolt. By using the U-shaped bolt to fix the above-mentioned fence 5-2 and the above-mentioned mounting seat 3 together, the stability of the mounting seat 3 during use can be effectively guaranteed. The distance between the top of the above-mentioned fence 5-2 and the above-mentioned platform main body 5-1 is adapted to the height of the above-mentioned lifting rod 1, so as to accommodate the above-mentioned lifting rod 1 within the above-mentioned fence 5-2 during the retraction process.

[0031] The above-mentioned mounting base 3 includes a mounting portion 3-2 and a connecting portion 3-3. The above-mentioned mounting portion 3-2 is used for being attached to the above-mentioned fence 5-2. The above-mentioned connecting portion 3-3 is formed on the side of the above-mentioned mounting portion 3-2 and a sliding hole 3-1 for the above-mentioned lifting rod 1 to pass through is provided at the top. Under the action of the above-mentioned driving mechanism, the above-mentioned lifting rod 1 can be installed in the above-mentioned sliding hole 3-1 and move up and down. The above-mentioned driving mechanism can be a driving motor or hydraulic driving, etc., which is installed at the bottom of the above-mentioned lifting rod 1 to drive the above-mentioned lifting rod 1 to lift in the height direction to meet the use requirements. In order to reduce the manufacturing difficulty while ensuring the smoothness during the lifting process and reducing the resistance during the lifting process, the above-mentioned lifting rod 1 is a round rod, the above-mentioned sliding hole 3-1 is a round hole, and the inner diameter of the above-mentioned sliding hole 3-1 is slightly larger than the outer diameter of the above-mentioned lifting rod 1.

[0032] In order 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 lifted or lowered, the above-mentioned lifting rod 1 can be fixed. Specifically, a butting hole 3-4 for a butting member 6 to pass through is further provided on the side of the above-mentioned connecting portion 3-3. The above-mentioned butting hole 3-4 is vertically arranged with the above-mentioned sliding hole 3-1, and the above-mentioned butting member 6 can be a indexing pin.

[0033] The above-mentioned limit sensor 2 with excellent recognition effect can be a limit switch, thereby further ensuring the safety of the staff during the work process.

[0034] A retractable anti-collision head device in this embodiment can be applied to, including but not limited to, an aerial work platform, and is used to ensure the safety of the staff during the work process.

[0035] An aerial work platform includes the above-mentioned retractable anti-collision head device; wherein, there are multiple above-mentioned retractable anti-collision head devices, and the multiple above-mentioned retractable anti-collision head devices are respectively installed on the top of the fence. When the limit sensor 1 of one of the above-mentioned retractable anti-collision head devices touches the top of the building, the aerial work platform stops lifting.

[0036] A retractable anti-collision device in this embodiment. The retractable anti-collision device is provided with a lifting rod 1, a limit sensor 2, a lifting solenoid valve and a driving mechanism for driving the lifting of the lifting rod 1. The limit sensor 2 is installed at the top of the lifting rod 1 to identify whether it touches the top of the building. When the limit sensor 2 touches the top of the building, the limit sensor 2 sends the obtained touch signal to the lifting solenoid valve. After receiving the signal, the lifting solenoid valve stops supplying power to the driving mechanism, so that the aerial work platform stops at the current position, thereby avoiding the collision between the worker's head and the top of the building and ensuring the safety of the worker during the work process. The device has a clever structure and a high degree of automation. It can automatically realize the lifting operation of the anti-collision head device, effectively protect the personal safety of the worker, reduce the damage to the anti-collision head device itself, ensure its service life, reduce the use cost, and is conducive to the popularization and application of the above retractable anti-collision device on the aerial work platform.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0038] Although the accompanying drawings in this article use more reference numerals: 1, lifting rod; 2, limit sensor; 3, mounting seat; 3-1, sliding hole; 3-2, mounting part; 3-3, connecting part; 3-4, abutting hole; 4, mounting plate; 4-1, mounting position; 5, aerial work platform; 5-1, platform main body; 5-2, fence; 6, abutting member; 7, connecting member; a, angle and other terms, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A retractable anti-collision device, characterized in that: For installation on an 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 of the lifting rod (1). The lifting rod (1) is installed on a mounting base (3) so as to be able to move up and down. The mounting base (3) is detachably installed on the aerial work platform. The limit sensor (2) is installed at the top of the lifting rod (1) for identifying whether it touches the top of a building. The limit sensor (2), the lifting solenoid valve, and the drive mechanism are connected by telecommunication signals. When the limit sensor (2) touches the top of a building, the limit sensor (2) sends the obtained touch signal to the lifting solenoid valve, and after the lifting solenoid valve obtains the signal, it stops supplying power to the drive mechanism to make the aerial work platform (5) stop at the current position.

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

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

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

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

6. The retractable anti-collision device according to claim 5, wherein: The mounting base (3) includes a mounting portion (3-2) and a connecting portion (3-3). The mounting portion (3-2) is used for being attached to the fence (5-2). The connecting portion (3-3) is formed on the side of the mounting portion (3-2), and a sliding hole (3-1) for the lifting rod (1) to pass through is provided at the top. Under the action of the drive mechanism, the lifting rod (1) can be installed in the sliding hole (3-1) to move up and down.

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

8. The retractable anti-collision device according to claim 7, characterized in that: A butting hole (3-4) for a butting member (6) to pass through is further provided on the side of the connecting portion (3-3), and the butting hole (3-4) is perpendicular to the sliding hole (3-1).

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

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

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