Protection mechanism of safety grating
By designing a buffer box and a protective box structure, the problem of safety light curtains being damaged by collisions was solved, achieving effective protection and cleaning functions and ensuring the normal operation of the safety light curtains.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHENHAO TECHNOLOGY CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-04-17
AI Technical Summary
Existing safety light curtains are easily damaged or displaced by collisions during use, affecting normal operation.
A safety light curtain protection mechanism was designed, including a buffer box and a protective box. The combination structure of the buffer plate and the glass plate absorbs the impact force, and the motor-driven cleaning plate removes contaminants, thus protecting the transmitter and receiver.
It effectively buffers impact forces, prevents transmitter and receiver displacement, ensures normal equipment operation, and can quickly clean dirt from the glass plate to maintain sensor functionality.
Smart Images
Figure CN224135660U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety light curtain technology, specifically a protection mechanism for a safety light curtain. Background Technology
[0002] Safety light curtains, also known as safety light screens or photoelectric safety protection devices, are sensor systems used for safety protection of industrial equipment. Their core function is to create an invisible detection zone using infrared beams. When personnel or objects enter the hazardous area, they immediately trigger an alarm or stop the equipment, thereby preventing mechanical injury.
[0003] However, existing safety light curtains are simply installed on the ground for use. When workers pass by the safety light curtain or objects fall from above, they are easily impacted at both ends and above, which may damage or displace the transmitter and receiver inside the safety light curtain, thus rendering the safety light curtain unusable. Therefore, we propose a protection mechanism for safety light curtains. Utility Model Content
[0004] The purpose of this invention is to provide a protective mechanism for a safety light curtain.
[0005] To address the problems mentioned in the background art, this utility model provides the following technical solution: a protective mechanism for a safety light curtain, comprising a base, mounting seats fixed on both sides of the base, a first safety light curtain and a second safety light curtain respectively fixed to the upper end of the mounting seats, a transmitter disposed inside the first safety light curtain, a receiver disposed inside the second safety light curtain, buffer boxes fixed to both ends of the first and second safety light curtains, a movable plate installed at the bottom of the buffer box, multiple sets of sliders fixed to one end of the inner wall of the buffer box, multiple sets of first sliding columns fixed to one end of the movable plate, a first buffer plate fixed to one end of the first sliding column, multiple sets of first springs disposed at the other end of the movable plate, a connecting block fixed to the upper end of the buffer box, a second sliding column penetrating through the upper end of the connecting block, a second buffer plate fixed to the upper end of the second sliding column, a sliding plate fixed to the lower end of the second sliding column, a second spring disposed at the upper end of the sliding plate, and a control plate disposed on one side of the buffer box.
[0006] Preferably, the buffer box is slidably connected to the movable plate, the slider passes through the movable plate, and the slider is slidably connected to the movable plate.
[0007] Preferably, the first sliding column passes through the buffer box, and the buffer box is slidably connected to the first sliding column, while the second sliding column is slidably connected to the connecting block.
[0008] Preferably, the buffer box is slidably connected to the slide plate, and the slide plate is slidably connected to the moving plate.
[0009] Preferably, multiple protective boxes are fixed to one side of both the first and second safety light curtains. A glass plate is provided at one end of each protective box, and a fixing plate is fixed to one end of each protective box. A motor is provided at the lower end of the fixing plate, and a screw is provided at the upper end of the motor. Multiple lifting plates are provided on the screw, and a cleaning plate is fixed to one side of each lifting plate. A sliding rod is fixed to the upper end of the fixing plate.
[0010] Preferably, the protective box is slidably connected to the glass plate, and the protective box is slidably connected to the cleaning plate.
[0011] Preferably, both the screw and the slide rod pass through the lifting plate, and the slide rod is slidably connected to the lifting plate.
[0012] By adopting the above technical solution, after the first buffer plate is impacted, it will impact the moving plate and compress the first spring. Then, under the elasticity of the first spring, the first buffer plate will buffer the impact. After the second buffer plate is impacted, it will impact the sliding plate through the second sliding post and stretch the second spring. Thus, under the elasticity of the second spring, the second buffer plate will buffer the impact. After the first or second buffer plate is impacted, it will push the moving plate and the sliding plate to move respectively. Then, the moving plate and the sliding plate will slide against each other, allowing the moving plate or the sliding plate to be further buffered by the second spring or the first spring. This improves the buffering strength of the first and second buffer plates, so that the safety light curtain protection mechanism can buffer when it is impacted at both ends and above, so that the impact force does not directly contact the first and second safety light curtains, and the transmitter and receiver will not be displaced.
[0013] By adopting the above technical solution, the glass plate is slid into the protective box to protect the transmitter and receiver. Then, by starting the motor, the motor drives the screw to rotate, which in turn drives the lifting plate to move up and down. This allows the cleaning plate to slide on the protective box and wipe the surface of the glass plate. At the same time, the lifting plate slides on the slide rod during the lifting process, making the lifting and lowering of the cleaning plate more stable. This allows the safety light curtain protection mechanism to protect the transmitter and receiver through the protective box and glass plate, and also allows for quick scraping and cleaning of the glass plate, ensuring that dirt does not affect the normal use of the transmitter and receiver. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure in an embodiment of the present utility model;
[0015] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;
[0016] Figure 3 This is a schematic diagram of the internal structure of the buffer box in an embodiment of this utility model;
[0017] Figure 4 This is a schematic diagram of the connection structure between the protective box and the sliding rod in an embodiment of this utility model.
[0018] In the diagram: 1. Base; 2. Mounting seat; 3. First safety light curtain; 4. Second safety light curtain; 5. Transmitter; 6. Receiver; 7. Buffer box; 8. Moving plate; 9. Slider; 10. First sliding column; 11. First buffer plate; 12. First spring; 13. Connecting block; 14. Second sliding column; 15. Second buffer plate; 16. Slide plate; 17. Second spring; 18. Protective box; 19. Glass plate; 20. Fixing plate; 21. Motor; 22. Screw; 23. Lifting plate; 24. Cleaning plate; 25. Sliding rod; 26. Control plate. Detailed Implementation
[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0020] Example 1:
[0021] Please see Figure 1-4This utility model provides a technical solution: a protective mechanism for a safety light curtain, including a base 1, with mounting seats 2 fixed on both sides of the base 1. A first safety light curtain 3 and a second safety light curtain 4 are respectively fixed to the upper end of the mounting seats 2. A transmitter 5 is disposed inside the first safety light curtain 3, and a receiver 6 is disposed inside the second safety light curtain 4. Buffer boxes 7 are fixed to both ends of the first safety light curtain 3 and the second safety light curtain 4. A movable plate 8 is installed at the bottom of the buffer box 7. Multiple sets of sliders 9 are fixed to one end of the inner wall of the buffer box 7. Multiple sets of first sliding pillars 10 are fixed to one end of the movable plate 8. A first buffer plate 11 is fixed to one end of the first sliding pillar 10. Multiple sets of first springs are disposed at the other end of the movable plate 8. A connecting block 13 is fixed to the upper end of the spring 12 and the buffer box 7. A second sliding post 14 is provided through the upper end of the connecting block 13. A second buffer plate 15 is fixed to the upper end of the second sliding post 14. A sliding plate 16 is fixed to the lower end of the second sliding post 14. A second spring 17 is provided at the upper end of the sliding plate 16. A control plate 26 is provided on one side of the buffer box 7. The buffer box 7 is slidably connected to the moving plate 8. A slider 9 passes through the moving plate 8 and is slidably connected to the moving plate 8. A first sliding post 10 passes through the buffer box 7 and is slidably connected to the first sliding post 10. The second sliding post 14 is slidably connected to the connecting block 13. The buffer box 7 is slidably connected to the sliding plate 16 and the sliding plate 16 is slidably connected to the moving plate 8.
[0022] Specifically, when the ends of the first safety light curtain 3 and the second safety light curtain 4 are impacted, the first buffer plate 11 will be impacted first. At this time, the first buffer plate 11 will push the moving plate 8 to slide on the slider 9 through the first sliding post 10. Then, the moving plate 8 will compress the first spring 12. Under the elasticity of the first spring 12, the moving plate 8 will offset the impact force. When the impact force disappears, the moving plate 8 will push the first buffer plate 11 back to its original position through the first sliding post 10. During the sliding time, the moving plate 8 will slide on the slide plate 16, causing the slide plate 16 to slide inside the buffer box 7 and compress the second spring 17. Then, under the elasticity of the second spring 17, the slide plate 16 will be compressed. This will also push the movable plate 8 to slide inside the buffer box 7, increasing the buffering strength of the first buffer plate 11. When the second buffer plate 15 is impacted from above, the second buffer plate 15 will push the slide plate 16 down through the second slide column 14, causing the slide plate 16 to stretch the second spring 17. Then the slide plate 16 will push the movable plate 8 inside the buffer box 7, causing the movable plate 8 to stretch the first spring 12. Then, under the elasticity of the second spring 17 and the first spring 12, the collision is offset, so that the protection mechanism of the safety light grid can buffer when it is impacted at both ends and above, so that the impact force will not directly contact the first safety light grid 3 and the second safety light grid 4, and the transmitter 5 and receiver 6 will not shift.
[0023] Example 2:
[0024] Please see Figure 1-4 This utility model provides a technical solution: a protection mechanism for a safety light curtain, wherein multiple sets of protective boxes 18 are fixed on one side of the first safety light curtain 3 and the second safety light curtain 4, a glass plate 19 is provided at one end of the protective box 18, a fixing plate 20 is fixed at one end of the protective box 18, a motor 21 is provided at the lower end of the fixing plate 20, a screw 22 is provided at the upper end of the motor 21, multiple sets of lifting plates 23 are provided on the screw 22, a cleaning plate 24 is fixed on one side of the lifting plate 23, a sliding rod 25 is fixed at the upper end of the fixing plate 20, the protective box 18 is slidably connected to the glass plate 19, the protective box 18 is slidably connected to the cleaning plate 24, the screw 22 and the sliding rod 25 both pass through the lifting plate 23, and the sliding rod 25 is slidably connected to the lifting plate 23.
[0025] Specifically, when the surface of the glass plate 19 becomes dirty, the control board 26 starts the motor 21, causing the motor 21 to drive the screw 22 to rotate. The screw 22 then drives multiple sets of lifting plates 23 to slide on the slide bar 25, thereby causing the lifting plates 23 to move the cleaning plate 24 downwards in the protective box 18. When the cleaning plate 24 passes through the protective box 18, it scrapes off the dirt on the surface of the glass plate 19. After scraping, the control board 26 starts the motor 21 in reverse, causing the motor 21 to drive the cleaning plate 24 back to its original position via the screw 22, thus completing the cleaning. The glass plate 19 can also block external collisions, preventing damage to the transmitter 5 and receiver 6. The safety light curtain protection mechanism can protect the transmitter 5 and receiver 6 through the protective box 18 and the glass plate 19, and can quickly scrape and clean the glass plate 19, so that the dirt will not affect the normal use of the transmitter 5 and receiver 6.
[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.
Claims
1. A protection mechanism for a safety grating comprising a base (1), characterised in that: Mounting seats (2) are fixed on both sides of the base (1). A first safety light curtain (3) and a second safety light curtain (4) are fixed on the upper end of the mounting seats (2). A transmitter (5) is installed inside the first safety light curtain (3), and a receiver (6) is installed inside the second safety light curtain (4). Buffer boxes (7) are fixed at both ends of the first safety light curtain (3) and the second safety light curtain (4). A movable plate (8) is installed at the bottom of the buffer box (7). Multiple sets of sliders (9) are fixed at one end of the inner wall of the buffer box (7), and multiple sets of first safety light curtains (6) are fixed at one end of the movable plate (8). A sliding column (10) is provided. One end of the first sliding column (10) is fixed with a first buffer plate (11). The other end of the moving plate (8) is provided with multiple sets of first springs (12). The upper end of the buffer box (7) is fixed with a connecting block (13). The upper end of the connecting block (13) is provided with a second sliding column (14). The upper end of the second sliding column (14) is fixed with a second buffer plate (15). The lower end of the second sliding column (14) is fixed with a sliding plate (16). The upper end of the sliding plate (16) is provided with a second spring (17). A control plate (26) is provided on one side of the buffer box (7).
2. A safety barrier according to claim 1, wherein: The buffer box (7) is slidably connected to the moving plate (8), and the slider (9) passes through the moving plate (8), and the slider (9) is slidably connected to the moving plate (8).
3. The security grating protection mechanism of claim 1, wherein: The first sliding column (10) passes through the buffer box (7) and is slidably connected to the first sliding column (10), and the second sliding column (14) is slidably connected to the connecting block (13).
4. The security grating protection mechanism of claim 2, wherein: The buffer box (7) is slidably connected to the slide plate (16), and the slide plate (16) is slidably connected to the moving plate (8).
5. The security grating protection mechanism of claim 1, wherein: Multiple protective boxes (18) are fixed on one side of the first safety light curtain (3) and the second safety light curtain (4). A glass plate (19) is provided at one end of the protective box (18). A fixing plate (20) is fixed at one end of the protective box (18). A motor (21) is provided at the lower end of the fixing plate (20). A screw (22) is provided at the upper end of the motor (21). Multiple lifting plates (23) are provided on the screw (22). A cleaning plate (24) is fixed on one side of the lifting plate (23). A slide rod (25) is fixed at the upper end of the fixing plate (20).
6. A safety barrier according to claim 5, wherein: The protective box (18) is slidably connected to the glass plate (19), and the protective box (18) is slidably connected to the cleaning plate (24).
7. A safety barrier according to claim 5, wherein: Both the screw (22) and the slide bar (25) pass through the lifting plate (23), and the slide bar (25) is slidably connected to the lifting plate (23).