A protective guard for a machining operation
Patent Information
- Application Number
- CN202522633033.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-11
AI Technical Summary
[0003]在机加工自动化生产线中，工业机器人与数控机床协同作业，其工作区域对人员构成碰撞、夹伤等重大安全风险，为解决此问题，目前普遍采用两种方式，一是设置固定的金属防护栏，实现硬性物理隔离；二是使用可移动的栅栏或网栏，在需要检修时由人工移开，然而，这些方案均存在明显缺陷，固定式防护栏虽坚固，但严重阻碍了工作人员在日常维护、调试时进出工作区，灵活性极差，影响生产效率，而普通的移动护栏仅能提供基础的隔离功能，无法与生产线的控制系统进行联锁，这导致在护栏被意外或未授权打开时，危险区域内的机床与机器人仍可能保持运行状态，存在极高的安全盲区，无法从本质上保障人员安全
本实用新型通过滑动组件与安全联锁组件的协同设置，实现了物理隔离与设备运行状态的强制联动，该设计利用所述滑动套、滑槽与滑块使延伸网和关闭门可轻便移动，并以关闭门的物理开闭状态作为核心安全信号，当关闭门闭合时，电磁锁将其锁定，同时接近开关检测到，到位信号并发送至外部控制系统，允许设备运行，一旦关闭门被打开，此联锁即刻解除，从控制系统层面剥夺危险设备的运行条件，从根本上杜绝了因人员误入而引发的安全事故，实现了本质安全。
Smart Images
Figure CN224902897U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of protective guardrail technology, and in particular to a protective guardrail for machining operations. Background Technology
[0002] Protective barriers, also known as safety barriers, are a type of isolation and protection facility widely used in industrial production and public environments. Their main function is to delineate safe areas, isolate hazardous sources, prevent personnel from accidentally entering high-risk spaces, or block flying objects through physical barriers, thereby ensuring personnel safety and the normal operation of equipment.
[0003] In automated machining production lines, industrial robots and CNC machine tools work together, and their working areas pose significant safety risks to personnel, such as collisions and pinching injuries. To address this issue, two common methods are currently employed: one is to install fixed metal guardrails for rigid physical isolation; the other is to use movable fences or wire mesh barriers that can be manually removed when maintenance is required. However, both solutions have significant drawbacks. While fixed guardrails are sturdy, they severely hinder workers from entering and exiting the work area during routine maintenance and debugging, resulting in extremely poor flexibility and impacting production efficiency. Ordinary movable guardrails only provide basic isolation and cannot be interlocked with the production line's control system. This means that if the guardrail is accidentally or unauthorizedly opened, the machine tools and robots in the danger zone may still remain operational, creating a very high safety blind spot and failing to fundamentally guarantee personnel safety. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a protective guardrail for machining operations.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a protective guardrail for machining operations, including a fixed frame and a combined frame. Two fixed frames are provided, and a protective net is fixedly connected between the two sides of the fixed frames. The combined frame is provided on one side of the fixed frames. A sliding component is provided on one side of the fixed frames and the combined frame. The sliding component includes a sliding sleeve and an extension net. Two sliding sleeves are fixedly connected to one side of the fixed frames and the combined frame. The extension net is placed between the two sliding sleeves. Sliding grooves are opened on both sides of the inner cavity of the sliding sleeve. A slider is slidably connected inside the sliding groove. The slider is fixedly connected to the extension net on the adjacent side.
[0006] As a preferred embodiment of this utility model, a rotating assembly is provided between the two sides of the extension net away from the assembly frame. The rotating assembly includes a rotating rod, which is rotatably connected between the two sides of the extension net away from the assembly frame. A closing door is fixedly connected to the surface of the rotating rod.
[0007] As a preferred technical solution of this utility model, a closing component is provided between the two sides of the closing door away from the combination frame. The closing component includes a closing frame, an electromagnetic lock and a push plate. The closing frame is provided between the two sides of the closing door away from the combination frame, and an electromagnetic lock is fixedly connected to one side of the closing door.
[0008] As a preferred embodiment of this utility model, an electric telescopic rod is fixedly connected to the top of the closing frame, a rubber pad is fixedly connected to the side of the electric telescopic rod away from the closing frame, and the push plate is fixedly connected to the top of the closing door.
[0009] As a preferred embodiment of this utility model, a reminder component is provided at the top of the closed door. The reminder component includes a sensor and an alarm. The sensor is fixedly connected to the surface of the extension net, and the alarm is fixedly connected to the top of the extension net. The sensor is used to control the alarm and the electromagnetic lock.
[0010] Compared with the prior art, the beneficial effects that this utility model can achieve are: This invention achieves forced linkage between physical isolation and equipment operation status through the coordinated arrangement of sliding components and safety interlock components. The design utilizes the sliding sleeve, sliding groove, and slider to allow easy movement of the extension net and closing door, and uses the physical opening and closing state of the closing door as the core safety signal. When the closing door is closed, the electromagnetic lock locks it, and at the same time, the proximity switch detects the position and sends an arrival signal to the external control system, allowing the equipment to operate. Once the closing door is opened, this interlock is immediately released, depriving the dangerous equipment of its operating conditions from the control system level, fundamentally eliminating safety accidents caused by personnel accidentally entering, and achieving inherent safety.
[0011] This invention achieves extremely high motion stability while ensuring flexibility through the cooperation of sliding components and fixed structures. The design utilizes the fixed frame and the combined frame to form a rigid frame through the guardrail cross brace, providing a precise guiding reference for the sliding sleeve and the extension net. This structure effectively ensures that the movement trajectory of the extension net under the cooperation of the sliding groove and the slider is always straight, eliminating jamming, vibration and additional wear caused by frame deformation or insufficient precision. This makes the opening and closing operation of the guardrail easy and efficient, and significantly improves the durability and reliability of the entire protection system under frequent use. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the protective net of this utility model; Figure 2 This is a schematic diagram of the structure of the electric telescopic rod of this utility model; Figure 3 This is a schematic diagram of the structure of the sliding sleeve of this utility model; Figure 4This is a schematic diagram of the slide groove of this utility model; Figure 5 This is a schematic diagram of the structure of the alarm device of this utility model; Figure 6 This is a schematic diagram of the rotating rod of this utility model.
[0013] Among them: 1. Fixed frame; 11. Combined frame; 12. Protective net; 21. Sliding sleeve; 22. Extension net; 23. Slide groove; 24. Slider; Rotate the lever; 31. Close the door; 41. Closing frame; 42. Electromagnetic lock; 43. Push plate; 44. Electric telescopic rod; 45. Rubber pad; 50. Sensor; 51. Alarm. Detailed Implementation
[0014] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.
[0015] Example: Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, a protective railing for machining operations includes a fixed frame 1 and a combined frame 11. Two fixed frames 1 are provided, and a protective net 12 is fixedly connected between the two sides of the fixed frame 1. The combined frame 11 is provided on one side of the fixed frame 1. A sliding component is provided on one side of the fixed frame 1 and the combined frame 11. The sliding component includes a sliding sleeve 20 and an extension net 21. The sliding sleeve 20 is fixedly connected to one side of the fixed frame 1 and the combined frame 11. Two sliding sleeves 20 are provided. The extension net 21 is placed between the two sliding sleeves 20. A sliding groove 22 is provided on both sides of the inner cavity of the sliding sleeve 20. A slider 23 is slidably connected inside the sliding groove 22. The slider 23 is fixedly connected to the extension net 21 on the adjacent side. A rotating component is provided between the two sides of the extension net 21 away from the combined frame 11. The rotating component includes a rotating rod 30. The rotating rod 30 is rotatably connected between the two sides of the extension net 21 away from the combined frame 11. A closing door 31 is fixedly connected to the surface of the rotating rod 30.
[0016] refer to Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, the operator first fixes two fixed frames 1 to a predetermined position outside the machine tool working area using expansion bolts. The two sides of the protective net 12 are fixedly connected between the sides of the two fixed frames 1. The combined frame 11 is placed in the predetermined position, parallel and aligned with the fixed frames 1. The sliding sleeves 20 are fixedly installed on the opposite side of the fixed frames 1 and the combined frame 11, ensuring that there are two sliding sleeves 20 on each side. The extension net 21 is placed between the two sets of sliding sleeves 20, so that the sliding grooves 22 on both sides of the extension net 21 and the sliders 23 fixed inside the sliding sleeves 20 form a sliding fit. When the automated production line is running normally, the operator pushes the extension net 21 and the closing door 31 along the sliding sleeves 20 to the fully closed position.
[0017] refer to Figure 1 , Figure 2 and Figure 5 As shown, a closing assembly is provided between the two sides of the closing door 31 away from the combination frame 11. The closing assembly includes a closing frame 40, an electromagnetic lock 41, and a push plate 42. The closing frame 40 is located between the two sides of the closing door 31 away from the combination frame 11. An electromagnetic lock 41 is fixedly connected to one side of the closing door 31. An electric telescopic rod 43 is fixedly connected to the top of the closing frame 40. A rubber pad 44 is fixedly connected to the side of the electric telescopic rod 43 away from the closing frame 40. The push plate 42 is fixedly connected to the top of the closing door 31. A reminder assembly is provided on the top of the closing door 31. The reminder assembly includes a sensor 50 and an alarm 51. The sensor 50 is fixedly connected to the surface of the extension net 21, and the alarm 51 is fixedly connected to the top of the extension net 21. The sensor 50 is used to control the alarm 51 and the electromagnetic lock 41.
[0018] refer to Figure 1 , Figure 2 and Figure 5 As shown, the proximity switch detects that the closing door 31 is in position and sends a safety signal to the production line PLC, allowing the machine tool and robot to operate normally. When authorized personnel need to perform equipment maintenance, the control system de-energizes and unlocks the electromagnetic lock 41. Then, the electric telescopic rod 43 moves, its output shaft extends and pushes the push plate 42, driving the closing door 31 to rotate around the rotating rod 30 to open. During this process, the sensor 50 detects the change in the state of the closing door 31 and triggers the alarm 51 to issue an audible and visual warning. At the same time, the proximity switch sends a stop signal to the PLC to ensure that the equipment is in a safe state. After the maintenance work is completed, the staff manually pushes the closing door 31 to the closed position, the electromagnetic lock 41 automatically locks, and after each sensor 50 detects the safe state, the system returns to normal operation mode.
[0019] Working principle: Before use: Refer to Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, the operator first fixes two fixed frames 1 to predetermined positions outside the machine tool working area using expansion bolts. The protective netting 12 is then fixedly connected to the sides of the two fixed frames 1. The combined frame 11 is placed in the predetermined position, parallel and aligned with the fixed frames 1. Sliding sleeves 20 are fixedly installed on opposite sides of the fixed frames 1 and the combined frame 11, ensuring two sliding sleeves 20 on each side. An extension net 21 is placed between the two sets of sliding sleeves 20, so that the grooves 22 on both sides of the extension net 21 slide in conjunction with the sliders 23 fixed inside the sliding sleeves 20. The rotating rod 30 is then... Rotary connection is made between the two sides of the extension net 21 away from the combination frame 11, and the closing door 31 is fixedly installed on the surface of the rotating rod 30. A closing frame 40 is set between the two sides of the closing door 31 away from the combination frame 11. An electromagnetic lock 41 is fixedly connected to the closing door 31 at the position corresponding to the closing frame 40. An electric telescopic rod 43 is fixedly connected to the top of the closing frame 40, so that its output end faces the closing door 31. A push plate 42 is fixedly connected to the top of the closing door 31, so that it is located on the travel path of the electric telescopic rod 43. A sensor 50 and an alarm 51 are fixedly connected to the surface and top of the extension net 21, respectively.
[0020] When using: Refer to Figure 1 , Figure 2 and Figure 5 As shown, during normal operation of the automated production line, the operator pushes the extension net 21 and the closing door 31 along the sliding sleeve 20 to the fully closed position. At this time, the electromagnetic lock 41 is energized, its locking tongue extends and locks the closing door 31 to the closing frame 40. Simultaneously, the proximity switch detects that the closing door 31 is in place and sends a safety signal to the production line PLC, allowing the machine tool and robot to operate normally. When authorized personnel need to perform equipment maintenance, the control system de-energizes and unlocks the electromagnetic lock 41. Then, the electric telescopic rod 43 moves, its output shaft extends and pushes the push plate 42, driving the closing door 31 to rotate around the rotating rod 30 to open. During this process, the sensor 50 detects the change in the state of the closing door 31 and triggers the alarm 51 to issue an audible and visual warning. At the same time, the proximity switch sends a stop signal to the PLC to ensure that the equipment is in a safe state.
[0021] After use: Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, after the maintenance work is completed, the staff manually pushes the closing door 31 to the closed position, the electromagnetic lock 41 automatically locks, and after each sensor 50 detects the safety status, the system returns to normal operation mode. When it is necessary to clean or maintain the guardrail itself, the extension net 21 can be slid along the slide 22 to remove it from the sliding sleeve 20, or the relevant parts can be directly disassembled for maintenance. After the maintenance is completed, the parts are reinstalled and the power supply is restored, and the process can be repeated to prepare for the next protection operation.
[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. A protective guardrail for machining operations, comprising a fixed frame (1) and a combined frame (11), characterized in that, Two fixed frames (1) are provided, and a protective net (12) is fixedly connected between the two sides of the fixed frame (1). The combined frame (11) is provided on one side of the fixed frame (1). A sliding assembly is provided on one side of the fixed frame (1) and the combined frame (11). The sliding assembly includes a sliding sleeve (20) and an extension net (21). The sliding sleeve (20) is fixedly connected to one side of the fixed frame (1) and the combined frame (11). There are two sliding sleeves (20). The extension net (21) is placed between the two sliding sleeves (20). Sliding grooves (22) are provided on both sides of the inner cavity of the sliding sleeve (20). A slider (23) is slidably connected inside the sliding groove (22). The slider (23) is fixedly connected to the extension net (21) on the adjacent side.
2. The machining operation protective railing according to claim 1, characterized in that, A rotating assembly is provided between the two sides of the extension net (21) away from the combination frame (11). The rotating assembly includes a rotating rod (30), which is rotatably connected between the two sides of the extension net (21) away from the combination frame (11). A closing door (31) is fixedly connected to the surface of the rotating rod (30).
3. The machining operation protective railing according to claim 2, characterized in that, A closing assembly is provided between the two sides of the closing door (31) away from the combination frame (11). The closing assembly includes a closing frame (40), an electromagnetic lock (41), and a push plate (42). The closing frame (40) is located between the two sides of the closing door (31) away from the combination frame (11). An electromagnetic lock (41) is fixedly connected to one side of the closing door (31).
4. A protective railing for machining operations according to claim 3, characterized in that, An electric telescopic rod (43) is fixedly connected to the top of the closing frame (40), and a rubber pad (44) is fixedly connected to the side of the electric telescopic rod (43) away from the closing frame (40). The push plate (42) is fixedly connected to the top of the closing door (31).
5. A protective railing for machining operations according to claim 2, characterized in that, The top of the closed door (31) is provided with an alert component, which includes a sensor (50) and an alarm (51), and the sensor (50) is fixedly connected to the surface of the extension net (21).
6. A protective railing for machining operations according to claim 5, characterized in that, The alarm (51) is fixedly connected to the top of the extension net (21), and the sensor (50) is used to control the alarm (51) and the electromagnetic lock (41).