Height limiting protection device for aerial work platform
By designing a height limiting device including mounting plate, sleeve, compression spring, induction rod and detection column, the problem of collision between high-altitude working platform and obstacles in the prior art is solved, and higher accuracy and more effective anti-collision protection are achieved.
Patent Information
- Application Number
- CN202421737360.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-22
AI Technical Summary
Among the existing high-lift protection devices for high-altitude working platforms, physical protection devices of anti-collision barriers cannot effectively prevent collisions between working platforms and obstacles. Infrared sensor devices have low detection accuracy in construction site environments and are susceptible to environmental factors.
A height limiting device including a mounting plate, sleeve, compression spring, induction rod and detection column is designed. When the induction rod contacts an obstacle during the rising process of the working platform, the detection column triggers the distance sensor and issues an alarm signal to remind the operator to avoid further rise.
The anti-collision protection alarm action is triggered through physical contact, which is more effective than the anti-collision rail to avoid squeezing accidents and reduce equipment damage; compared with infrared sensors, it is less affected by environmental factors and has higher accuracy.
Smart Images
Figure CN222989729U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aerial work platforms, in particular to a height limit protection device for aerial work platforms. Background Art
[0002] During the process of an operator operating an aerial work platform for routine construction, he must always be highly vigilant and closely monitor the surrounding environment and potential risks. However, in a complex and changeable construction site, there may be various obstacles above the work platform, such as unremoved scaffolding, suspended building materials, electric wires or temporarily set warning signs, etc.
[0003] If these obstacles cannot be discovered and properly handled in time, during the process of the working platform ascending with variable amplitude, the working platform is very likely to collide with them. Such a collision will not only damage the working platform itself and make it lose stability, but more importantly, it will cause serious injuries to the personnel on the working platform. At the moment of the collision, the strong impact force will cause the personnel to be thrown out of the working platform or fall from a height, resulting in fractures, internal organ injuries or even fatal injuries. At the same time, the sudden shaking and deformation of the working platform may also cause the personnel to be trapped or crushed, further aggravating the severity of the accident.
[0004] In the prior art, usually an anti-collision fence is installed to prevent the working platform from colliding with surrounding obstacles. However, this method cannot effectively avoid the collision between the working platform and obstacles, and it needs to be replaced after being damaged; or an infrared sensor is installed to monitor the surrounding environment of the platform in real time. Once an obstacle is detected, an alarm will be immediately issued or the movement of the platform will be automatically stopped. However, the infrared frequency may be affected by hard objects (such as partitions), resulting in the sensor not working properly or generating false alarms. Moreover, factors such as smoke, dust, haze, sunlight, etc. in the construction environment may also have a negative impact on the performance of the infrared sensor and reduce its detection accuracy. Content of the Utility Model
[0005] In order to solve the technical problems that in the height limit and anti-collision device for aerial work platforms in the prior art, the physical protection device such as an anti-collision fence cannot effectively avoid the collision between the working platform and obstacles, and the construction site environment has a great influence on the accuracy of the height limit and anti-collision device such as an infrared sensor, the utility model provides a height limit protection device for aerial work platforms.
[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0007] A height-limiting protection device for an aerial work platform, comprising a work platform, on the top of which several height-limiting devices are installed. The height-limiting device includes a mounting plate, at the top of the mounting plate is connected a vertically arranged sleeve. At the top of the sleeve is provided a compression spring coaxially arranged with the sleeve. An induction rod is sleeved inside the compression spring. The induction rod penetrates into the sleeve. At the bottom of the induction rod is installed a detection column, and the bottom end of the detection column penetrates out of the bottom of the sleeve. The outer diameter of the bottom end of the detection column is larger than the inner diameter of the sleeve. On one side of the bottom of the mounting plate facing the detection column is installed a distance sensor, and the distance sensor is electrically connected to an alarm indicator.
[0008] With the above structural scheme, when the work platform is rising, when the top end of the induction rod touches an obstacle, the obstacle will push the induction rod to slide downward in the sleeve, driving the detection column to move downward. When the detection column approaches the distance sensor, it will trigger the alarm indicator to send out an alarm signal, such as a light signal, a sound signal, etc., to remind the operator on the work platform and limit the further rise of the work platform to avoid causing a squeezing accident. When away from the obstacle, the induction rod will slide upward in the sleeve under the reset pulling of the compression spring and return to the initial position, and the detection column is away from the distance sensor. This application triggers the anti-collision protection alarm action through physical contact. Compared with setting up a guardrail, it can more effectively avoid squeezing accidents and reduce equipment damage. Compared with setting up an infrared sensor, it is less affected by environmental factors and has higher accuracy.
[0009] As a preferred implementation of a height-limiting protection device for an aerial work platform, the induction rod includes a disc, the bottom end of the disc is coaxially connected to a rod body. The outer diameter of the disc is larger than the inner diameter of the compression spring. The rod body penetrates into the inside of the compression spring. At the bottom end of the rod body is opened a threaded hole; on the outer peripheral surface of the top end of the detection column is opened an external thread, and the bottom end of the rod body is threadedly connected to the top end of the detection column.
[0010] With the above structural scheme, the disc is used to contact the obstacle and push the compression spring, and can limit the downward displacement of the rod body; the rod body can slide up and down inside the sleeve.
[0011] As a preferred implementation of a height-limiting protection device for an aerial work platform, the detection column includes an upper column and a lower column. The top end of the upper column is connected to the bottom end of the induction rod. The outer diameter of the upper column is less than or equal to the inner diameter of the sleeve, and the outer diameter of the lower column is larger than the inner diameter of the sleeve.
[0012] With the above structural scheme, the detection column is used to trigger the distance sensor, the upper column is used to connect with the induction rod, and the lower column is used to limit the upward displacement of the induction rod.
[0013] As a preferred implementation of a height-limiting protection device for an aerial work platform, on the outer peripheral surface of the bottom of the lower column are opened two opposite chamfered notches, and the chamfered notches extend to the bottom end face of the lower column.
[0014] With the above structural solution, the two chamfered notches can be used for pre-tightening with a wrench when the detection column and the induction rod are assembled.
[0015] As a preferred implementation of a height limit protection device for an aerial work platform, the sleeve includes a contact disc. The outer diameter of the contact disc is larger than the outer diameter of the compression spring. The bottom end of the contact disc is coaxially connected to the cylinder body. The bottom end of the cylinder body is connected to the fixing plate. The fixing plate is installed on the top of the mounting plate. The sleeve is hollow as a whole. The inner diameters of the contact disc, the cylinder body, and the fixing plate are all larger than the outer diameter of the induction rod.
[0016] With the above structural solution, the thickness of the contact disc is set as thick as possible according to the actual application conditions to avoid deformation caused by abnormal contact extrusion of the compression spring. The cylinder body is used for the induction rod to slide up and down and does not swing significantly in the radial direction. The fixing plate is used to be fixed on the top of the mounting plate.
[0017] As a preferred implementation of a height limit protection device for an aerial work platform, a protective cover is provided outside the distance sensor. The protective cover is connected to the side of the mounting plate facing the detection column. The protective cover and the side of the mounting plate are connected by stud bolts.
[0018] With the above structural solution, the protective cover can protect the distance sensor.
[0019] As a preferred implementation of a height limit protection device for an aerial work platform, a protective fence is installed on the top of the work platform. Several height limit devices are installed on the top of the protective fence.
[0020] With the above structural solution, the protective fence can further protect the staff and the work platform and reduce the accident loss of crushing accidents.
[0021] The beneficial effects of the present utility model include:
[0022] This application triggers the anti-collision protection alarm action through physical contact. Compared with setting up an anti-collision fence, it can more effectively avoid crushing accidents and reduce equipment damage. Compared with setting up an infrared sensor, it is less affected by environmental factors and has higher accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 It is a three-dimensional structural schematic diagram of a height limit protection device for an aerial work platform in a specific embodiment of the present utility model;
[0025] Figure 2 It is a schematic cross-sectional structure diagram of the height-limiting device in the specific embodiment of the present utility model;
[0026] Figure 3 It is a schematic structure diagram of the height-limiting device in the specific embodiment of the present utility model;
[0027] Figure 4 It is a schematic three-dimensional structure diagram of the protective cover in the specific embodiment of the present utility model;
[0028] Figure 5 It is a schematic three-dimensional structure diagram of the compression spring in the specific embodiment of the present utility model;
[0029] Figure 6 It is a schematic three-dimensional structure diagram of the induction rod in the specific embodiment of the present utility model;
[0030] Figure 7 It is a schematic three-dimensional structure diagram of the sleeve in the specific embodiment of the present utility model;
[0031] Figure 8 It is a schematic three-dimensional structure diagram of the detection column in the specific embodiment of the present utility model.
[0032] List of components and reference numerals:
[0033] 1. Working platform; 2. Height-limiting device; 3. Mounting plate; 4. Sleeve; 41. Contact plate; 42. Cylinder body; 43. Fixed plate; 5. Compression spring; 6. Induction rod; 61. Disc; 62. Rod body; 63. Threaded hole; 7. Detection column; 71. Upper column; 72. Lower column; 73. Chamfered notch; 8. Distance sensor; 9. Protective cover; 10. Stud; 11. Protective fence; 12. Washer; 13. Fixing piece. Specific embodiment
[0034] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this application.
[0035] Refer to Figure 1-8 , this embodiment provides a height-limiting protection device for an aerial work platform, including a working platform 1, a protective fence 11 is installed on the top of the working platform 1, and a plurality of height-limiting devices 2 are installed on the top of the protective fence 11.
[0036] The height-limiting device 2 includes a mounting plate 3 which is installed on the side of the protective fence 11. The mounting plate 3 is a thick plate. A vertically arranged sleeve 4 is connected to the top of the mounting plate 3. The sleeve 4 is hollow as a whole. The sleeve 4 includes a contact plate 41. The bottom end of the contact plate 41 is coaxially connected to the cylinder body 42. The bottom end of the cylinder body 42 is connected to a fixing plate 43. One side of the fixing plate 43 is installed on the top of the mounting plate 3 through a fixing member 13. The contact plate 41, the cylinder body 42 and the fixing plate 43 are coaxially arranged and have the same inner diameter. The fixing member 13 can be a bolt. A washer 12 is connected to the bottom end of the fixing plate 43. A compression spring 5 coaxially arranged with the contact plate 41 is provided on the top of the contact plate 41. The outer diameter of the contact plate 41 is larger than the outer diameter of the compression spring 5. An induction rod 6 is sleeved inside the compression spring 5. The inner diameters of the contact plate 41, the cylinder body 42 and the fixing plate 43 are all larger than the outer diameter of the induction rod 6. The induction rod 6 penetrates into the sleeve 4 and can slide in the sleeve 4 but does not shake.
[0037] The induction rod 6 includes a disc 61. The bottom end of the disc 61 is coaxially connected to a rod body 62. The outer diameter of the disc 61 is larger than the inner diameter of the compression spring 5. The rod body 62 penetrates into the inside of the compression spring 5. A threaded hole 63 is opened at the bottom end of the rod body 62. A detection column 7 is installed at the bottom of the rod body 62. The detection column 7 includes an upper column 71 and a lower column 72. External threads are provided on the outer peripheral surface of the upper column 71. The upper column 71 is threadedly connected to the threaded hole 63 at the bottom end of the induction rod 6. The outer diameter of the upper column 71 is less than or equal to the inner diameter of the sleeve 4. The outer diameter of the lower column 72 is larger than the inner diameter of the sleeve 4. The lower column 72 penetrates through the bottom of the fixing plate 43 along the vertical side surface of the mounting plate 3. The stepped surface between the lower column 72 and the upper column 71 can abut against the lower end surface of the washer 12. Two oppositely positioned chamfered notches 73 are opened on the outer peripheral surface at the bottom of the lower column 72, and the chamfered notches 73 extend to the bottom end face of the lower column 72.
[0038] A distance sensor 8 is installed on one side of the bottom of the mounting plate 3 facing the detection column 7. The distance sensor 8 is electrically connected to an alarm indicator. A protective cover 9 is provided outside the distance sensor 8. The protective cover 9 is connected to one side of the mounting plate 3 facing the detection column 7. The protective cover 9 and the side of the mounting plate 3 are connected by a stud 10.
[0039] The working principle of this embodiment is as follows:
[0040] When the working platform 1 is rising, when the top end of the induction rod 6 touches an obstacle, the obstacle will push the induction rod 6 to slide downward in the sleeve 4, driving the detection column 7 to move downward. When the detection column 7 approaches the distance sensor 8, it will trigger the alarm indicator to send out an alarm signal, such as a light signal, a sound signal, etc., to remind the operator on the working platform 1 and limit the further rise of the working platform to avoid causing a pinching accident.
[0041] In this embodiment, the distance sensor 8 can also be connected to the controller, and the controller is connected to the power system of the working platform 1. When the detection column 7 approaches the distance sensor 8, it indicates that the induction rod 6 has touched an obstacle. The distance sensor 8 sends a signal to the controller, and the controller controls the power system to stop rising, thus effectively avoiding crushing accidents and ensuring the safety of the staff.
[0042] In this embodiment, the anti-collision protection alarm action is triggered by physical contact. Compared with setting anti-collision fences, it can more effectively avoid crushing accidents and reduce equipment damage. Compared with setting infrared sensors, it is less affected by environmental factors and has higher accuracy.
[0043] 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 obvious 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 rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A height limiting protective device for an aerial work platform, comprising a working platform (1), characterized in that: A plurality of height limiting devices (2) are installed on the top of the working platform (1). The height limiting devices (2) include a mounting plate (3). A vertically arranged sleeve (4) is connected to the top of the mounting plate (3). A compression spring (5) coaxially arranged with the sleeve (4) is provided on the top of the sleeve (4). A sensing rod (6) is sleeved inside the compression spring (5). The sensing rod (6) penetrates into the sleeve (4). A detection column (7) is installed at the bottom of the sensing rod (6). The bottom end of the detection column (7) penetrates the bottom of the sleeve (4). The outer diameter of the bottom end of the detection column (7) is greater than the inner diameter of the sleeve (4). A distance sensor (8) is installed on the side of the bottom of the mounting plate (3) facing the detection column (7). The distance sensor (8) is electrically connected to an alarm prompter.
2. The height limiting protection device for an aerial work platform according to claim 1, characterized in that: The sensing rod (6) comprises a disc (61), the bottom end of the disc (61) is coaxially connected to the rod body (62), the outer diameter of the disc (61) is larger than the inner diameter of the compression spring (5), the rod body (62) penetrates into the compression spring (5), and a threaded hole (63) is formed at the bottom end of the rod body (62); an outer peripheral surface of the top end of the detection column (7) is formed with an external thread, and the bottom end of the rod body (62) is threadedly connected to the top end of the detection column (7).
3. A height limiting protective device for an aerial work platform according to claim 1 or 2, characterized in that: The detection column (7) comprises an upper column (71) and a lower column (72), the top end of the upper column (71) is connected to the bottom end of the sensing rod (6), the outer diameter of the upper column (71) is less than or equal to the inner diameter of the sleeve (4), and the outer diameter of the lower column (72) is greater than the inner diameter of the sleeve (4).
4. The height limiting protection device for an aerial work platform according to claim 3, characterized in that: The outer peripheral surface of the bottom of the lower column (72) is provided with two chamfered notches (73) at opposite positions, and the chamfered notches (73) extend to the bottom end surface of the lower column (72).
5. The height limiting protection device for an aerial work platform according to claim 1, characterized in that: The sleeve (4) comprises a contact plate (41), the outer diameter of the contact plate (41) is larger than the outer diameter of the compression spring (5), the bottom end of the contact plate (41) is coaxially connected to the cylinder (42), the bottom end of the cylinder (42) is connected to the fixing plate (43), the fixing plate (43) is mounted on the top of the mounting plate (3), the sleeve (4) is hollow as a whole, and the inner diameters of the contact plate (41), the cylinder (42) and the fixing plate (43) are all larger than the outer diameter of the sensing rod (6).
6. The height limiting protection device for an aerial work platform according to claim 1, characterized in that: A protective shield (9) is provided on the outside of the distance sensor (8), the protective shield (9) is connected to a side of the mounting plate (3) facing the detection column (7), and the protective shield (9) is connected to the side of the mounting plate (3) via a stud bolt (10).
7. The height limiting protection device for an aerial work platform according to claim 1, characterized in that: A protective fence (11) is installed on the top of the working platform (1), and a plurality of height limiting devices (2) are installed on the top of the protective fence (11).