A capped fence screen

Abstract

The present application relates to the technical field of fences, and discloses a hemmed fence guard net, which comprises a fence body, the fence body comprising a fence frame; a climbing prevention unit, the climbing prevention unit comprising a plurality of groups of electric push rods installed on the fence frame, a fixed arm being installed on the telescopic end of the electric push rod, and a rotating arm being arranged on the fixed arm; the climbing prevention unit further comprising a rotating shaft, a first connecting shaft and a second connecting shaft; and an expansion mechanism being arranged on the second connecting shaft. The fixed arm and the rotating arm structure driven by the electric push rod are arranged, so that active height adjustment of the climbing prevention unit is realized; and a roller shaft is arranged on the first connecting shaft, and the roller shaft is in close contact with the entrance of the intrusion path at the top of the fence after being lifted, so that a smooth surface without a stable supporting point is contacted, and the smooth surface is slipped off by force, so that effective force cannot be formed.

Description

Technical Field

[0001] This invention relates to the field of fencing technology, and more specifically, to a rimmed fencing net. Background Technology

[0002] Edge-sealed fencing, due to its regular structure, convenient installation, and aesthetically pleasing appearance, is widely used in locations requiring a certain height of protection, such as factory perimeters, warehouse exterior walls, traffic dividers, and power distribution facility protection. To enhance its anti-climbing capability, existing technologies typically employ passive protective components such as barbed wire coils, anti-climb spikes, diagonal bracing, or fixed heightened netting added to the top of the fencing. Once these components are fixed during the construction and installation phase, their structural height, tilt angle, tip orientation, and component spacing are completely determined, and they will not undergo any active or passive morphological changes during their subsequent service life.

[0003] Specifically, the anti-climb components at the top of the fence are constantly exposed to the external environment, making their structural features fully visible. Potential climbers can obtain complete information on the geometric parameters and structural weaknesses of these components through remote visual observation or close-up inspection. They can identify stress points such as the ends of the posts, the top edges of the crossbars, and the connection nodes between the mesh and the frame, and plan their force application sequence and weight transfer path in advance. In this situation, the static components originally designed to prevent climbing actually provide climbers with structured and predictable support nodes, severely weakening the design effectiveness of the anti-climb facility. Summary of the Invention

[0004] This invention provides a perimeter-enclosed fence, which solves the technical problem in related technologies where, once the components are fixed during the construction and installation phase, they do not undergo any active or passive morphological changes during the subsequent service life, allowing potential climbers to plan their footholds for climbing and crossing through remote visual observation or close-range reconnaissance.

[0005] This invention provides a perimeter-sealed fence, comprising: The fence body includes a fence frame, on which a connecting protective net is installed; An anti-climbing unit is installed on the fence frame. The anti-climbing unit includes multiple sets of electric push rods installed on the fence frame. A fixed arm is installed on the telescopic end of the electric push rod, and a rotating arm is provided on the fixed arm. The anti-climb unit also includes a rotating shaft, a first connecting shaft, and a second connecting shaft; The rotating shaft is rotatably connected to each set of fixed arms via bearings, and multiple sets of the rotating arms are mounted on the rotating shaft; Multiple sets of the first connecting shafts are rotatably connected to each set of fixed arms via bearings, and rollers are mounted on the first connecting shafts; Multiple sets of second connecting shafts are fixedly connected to each set of rotating arms, and an expansion mechanism is provided on the second connecting shafts.

[0006] As a further optimization of the present invention, the fence frame includes two sets of horizontal connecting frames and three sets of vertical connecting frames located between the two sets of horizontal connecting frames. The horizontal connecting frames are provided with edge-sealing parts, and the edge-sealing parts are provided with multiple sets of fastening bolts inside. The fastening bolts are used to thread-fix the connection between the horizontal connecting frames and the vertical connecting frames.

[0007] As a further optimization of the present invention, the edge-binding component is arranged in a U-shape and is used to wrap the connection between the horizontal connecting frame and the vertical connecting frame.

[0008] As a further optimization of the present invention, the expansion mechanism includes a connecting plate disposed between every two sets of adjacent rotating arms. The connecting plate is rotatably connected to the second connecting shaft via a bearing. A cam column is disposed between the connecting plates, and multiple sets of cam grooves are formed in a ring on the outer surface of the cam column. An expansion roller is slidably connected inside the cam groove, and a shaft is connected to the internal bearing of the expansion roller.

[0009] As a further optimization of the present invention, the cam groove is provided with an inclined structure.

[0010] As a further optimization of the present invention, a baffle plate is installed on the outwardly protruding end of the cam groove.

[0011] As a further optimization of the present invention, the connecting plate is provided with a sliding groove that matches the position of the shaft, and the sliding groove and the shaft are slidably connected.

[0012] As a further optimization of the present invention, a spring is provided inside the slide groove, with one end of the spring fixedly connected to the slide groove and the other end of the spring fixedly connected to the shaft.

[0013] As a further optimization of the present invention, a motor is installed on one of the fixed arms, and the output shaft of the motor is fixedly connected to the rotating shaft.

[0014] As a further optimization of the present invention, the second connecting shaft has a built-in pressure sensor, and infrared beam sensors are also symmetrically arranged on the fence frame. The infrared beam sensors are electrically connected to the input terminal of the controller.

[0015] The beneficial effects of this invention are as follows: By setting up a fixed arm and a rotating arm structure driven by an electric push rod, this invention achieves active height adjustment of the anti-climbing unit. In the alert state, the electric push rod extends and rises, immediately forming an additional mechanical barrier above the top of the fence, which can greatly increase the psychological pressure and climbing difficulty for climbers. Furthermore, by setting a roller on the first connecting shaft, which closely contacts the entrance of the intrusion path at the top of the fence after being raised, it contacts a smooth surface that rolls flexibly without stable support points, and slips off as soon as force is applied, making it impossible to apply effective force. At the same time, after the rotating arm falls, the expansion mechanism on the second connecting shaft forms a set of dynamic rotating barriers. Its variable diameter expansion roller feature makes it impossible for climbers to grip, further enhancing the blocking effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the anti-climbing unit of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the anti-climbing unit of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the expansion mechanism of the present invention; Figure 6 This is a cross-sectional view of the expansion mechanism of the present invention; Figure 7 This is a schematic diagram of the connection relationship between the connecting disc, shaft, slide groove and spring of the present invention; Figure 8 This is a three-dimensional structural diagram of the anti-climb unit of the present invention in its working state; Figure 9 This is a schematic diagram of the fixed arm and rotating arm in their rotating states according to the present invention.

[0017] In the diagram: 100, fence body; 110, fence frame; 120, connecting netting; 130, edging piece; 140, fastening bolt; 200, anti-climb unit; 210, electric push rod; 220, fixed arm; 230, rotating arm; 240, rotating shaft; 250, first connecting shaft; 260, roller shaft; 270, second connecting shaft; 280, expansion mechanism; 281, connecting plate; 282, cam column; 283, cam groove; 284, expansion roller; 285, shaft; 286, slide groove; 287, spring; 288, barrier plate; 290, motor. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] According to the appendix Figure 1 and attached Figure 2 As shown, the present invention provides a perimeter fence net, which mainly includes a fence body 100 and an anti-climbing unit 200; the fence body 100 includes a fence frame 110 and a connecting net 120 covering and installed on the fence frame 110.

[0020] In a preferred embodiment, the fence frame 110 is composed of two sets of horizontal connecting frames and three sets of vertical connecting frames arranged in a crisscross pattern to form multiple rectangular frame units.

[0021] To achieve a high-strength and easy-to-disassemble connection, the horizontal connecting frame is provided with an edge banding 130. The edge banding 130 is U-shaped and wraps around the connection node of the horizontal connecting frame and the vertical connecting frame from the outside, integrating the two into one in terms of force. Multiple sets of fastening bolts 140 are provided inside the edge banding 130.

[0022] During assembly, the connection points of the horizontal and vertical connecting frames are placed into the grooves of the U-shaped edging piece 130, and then the fastening bolts 140 are tightened. The bolts pass through the edging piece 130 and the internal connecting frame to achieve threaded fixation. This structure transforms the point or line force of the traditional connection method into the clamping force of surface contact, greatly enhancing the bending and torsional resistance of the structure.

[0023] According to the appendix Figure 3 and attached Figure 4 As shown, the anti-climb unit 200 is mounted on the fence frame 110. The unit's operation is based on multiple sets of electric push rods 210 mounted on the fence frame 110. The electric push rods 210 provide an upward linear driving force for the system. Each electric push rod 210 has a fixed arm 220 mounted on the top of its telescopic end.

[0024] Therefore, when the electric push rod 210 is activated, all the fixed arms 220 will drive the auxiliary mechanisms on them to achieve synchronous lifting and lowering of the whole.

[0025] The anti-climb unit 200 also includes a rotating shaft 240, a first connecting shaft 250, and a second connecting shaft 270; The rotating shaft 240 is rotatably connected to each set of fixed arms 220 via bearings, and the rotating shaft 240 is the pivot for realizing the rotational movement. Multiple sets of rotating arms 230 are fixedly connected to the rotating shaft 240, so when the rotating shaft 240 rotates, all rotating arms 230 can swing synchronously, swinging down from a roughly vertical position to a horizontal or lower position.

[0026] To drive this crucial swing, a motor 290 is mounted on one of the fixed arms 220. The output shaft of the motor 290 is fixedly connected to the rotating shaft 240 via a coupling or other means. Thus, the controller can precisely control the start, stop, and speed of the motor 290, thereby precisely controlling the swing angle and speed of the rotating arm 230.

[0027] Multiple sets of first connecting shafts 250 are rotatably connected to each set of fixed arms 220 via bearings. Rollers 260 are also fixedly mounted on the first connecting shafts 250. The rollers 260 have smooth, cylindrical surfaces. When the entire anti-climb unit 200 is raised to the working position by the electric push rod 210, these rollers 260 are positioned directly above or immediately behind the top of the fence, and are closely arranged. Anyone attempting to climb over the fence from the front must first hook their hands or feet onto this row of rollers 260. However, because the rollers 260 can rotate freely and extremely smoothly, any force applied by the climber is converted into the rolling motion of the rollers 260, causing the point of contact to slip instantly, making it impossible to use this point to climb upwards.

[0028] Multiple sets of second connecting shafts 270 are fixedly connected to each set of rotating arms 230. When the rotating arms 230 are driven to fall to a preset angle, the second connecting shafts 270 rotate to the upper outer area of ​​the fence, forming a horizontal barrier. An expansion mechanism 280 is provided on the second connecting shafts 270.

[0029] According to the appendix Figure 4 To be continued Figure 7 As shown, in a preferred embodiment, the expansion mechanism 280 includes two sets of rotatable connecting discs 281 disposed between two sets of adjacent rotating arms 230. The connecting discs 281 are rotatably connected to the second connecting shaft 270 via bearings, and the connecting discs 281 can rotate freely independently of the second connecting shaft 270.

[0030] Between the two connecting discs 281, an irregularly shaped cam post 282 is provided, which is fixed on the rotating shaft 240 and the second connecting shaft 270 respectively. On the outer surface of the cam post 282, multiple sets of cam grooves 283 are evenly formed in a ring. The cam grooves 283 are not simple straight grooves, but are set with an inclined structure and the groove walls are curved, forming a curved limiting path.

[0031] An expansion roller 284 is slidably connected inside each cam groove 283. A shaft 285 is connected inside the expansion roller 284 via bearings. Correspondingly, a groove 286, corresponding to the position and number of shafts 285, is formed on the side of the connecting disc 281. This groove 286 is a straight groove. Both ends of the shaft 285 are respectively embedded in the grooves 286 of the two connecting discs 281 and can slide freely radially along the grooves 286. To provide the expansion roller 284 with an automatic reset force, a spring 287 is provided inside the groove 286. One end of the spring 287 is fixedly connected to the bottom of the groove 286, and the other end is fixedly connected to the shaft 285.

[0032] When untouched, under the tension of spring 287, shaft 285 and expansion roller 284 are pulled towards the axis of cam column 282 and retract to the deepest part of cam groove 283, at which point the outer diameter of the entire mechanism is at its minimum. Once a climber attempts to grasp the barrier formed by connecting disc 281, cam column 282, or second connecting shaft 270, their hand will inevitably exert force, triggering rolling friction.

[0033] When this external force causes the external connecting disc 281 and the second connecting shaft 270 to rotate slightly, since the cam column 282 is fixed, the shaft 285, which is originally slidably connected in the inclined cam groove 283, will be subjected to the forced thrust of the groove wall. The thrust will overcome the tension of the spring 287, forcing the shaft 285 to push outward along the slide groove 286, thereby driving the expansion roller 284 to expand radially outward.

[0034] The diameter of the cylinder gripped by the climber increases instantly, directly widening the gap between their thumb and forefinger or altering the gripping space of their fingers. The resulting enormous repulsive force renders the climber unable to exert any force, forcing them to immediately release their grip. Once released, the external force disappears, and under the elastic restoring force of spring 287, shaft 285 is pulled back into cam groove 283, expansion roller 284 resets, and the mechanism returns to its original state, awaiting the next trigger.

[0035] Furthermore, a baffle plate 288 is installed on the outwardly protruding end of the cam groove 283. Its function is to physically limit the extreme position of the shaft 285, prevent it from accidentally coming out of the cam groove 283, and ensure the reliability of the system operation.

[0036] In one embodiment, infrared beam sensors are symmetrically installed at appropriate locations on the fence frame 110, such as the starting boundary of the protected area. These sensors are used to form one or more invisible infrared detection walls. Simultaneously, highly sensitive pressure sensors are built into key force-bearing components such as the rotating shaft 240, the second connecting shaft 270, or the connecting plate 281. These two types of sensors, along with an external controller installed in a waterproof electrical control box, constitute the intelligent sensing module.

[0037] The infrared beam sensor is electrically connected to the input terminal of the controller, while the pressure sensor, motor 290, and electric push rod 210 are electrically connected to the output terminal of the controller.

[0038] According to the appendix Figure 1 To be continued Figure 7 As shown, the system's working principle and automatic anti-climbing process are as follows: In its initial state, the electric push rod 210 is in a retracted state, and the anti-climb unit 200 is at a non-obtrusive height, making it difficult for humans or animals to easily access the mechanism at a higher position.

[0039] When an animal approaches and attempts to damage or climb over the fence, its body will inevitably block or cut off the beam of light generated by the infrared beam sensor. The infrared beam sensor will then send the collected real-time monitoring signal to the controller. The controller has a pre-set logic judgment algorithm that can filter out interference signals such as birds and fallen leaves based on the signal's abrupt change characteristics, such as the width of the blockage and the speed of movement, to accurately determine whether there is a real climbing behavior.

[0040] Once climbing behavior is detected, the controller immediately generates a first control signal, commanding all electric push rods 210 to extend synchronously. The fixed arm 220, together with the rotating arm 230, roller 260 and expansion mechanism 280 mounted on it, are raised as a whole to the preset defense height.

[0041] At this point, the effective height of the fence increases, making it more difficult to climb. The roller 260 and the expansion mechanism 280 are raised and closely arranged on the climbing path at the top of the fence, forming a heightened fence.

[0042] If a climber attempts to grab the second connecting shaft 270 or the expansion mechanism 280 covering it for leverage, the pressure applied by their hand as they grip and try to pull themselves up will be collected by a built-in pressure sensor. The controller monitors the pressure value detected by the pressure sensor. If the pressure value exceeds a set threshold, for example, greater than the force of a normal person accidentally touching it, and lasts for a preset duration, such as 1 to 2 seconds, the controller can determine that the climber is engaging in a continuous struggle against the anti-climb unit 200, rather than accidentally touching it.

[0043] Once this determination is established, the controller immediately generates a second control signal. This signal first starts the motor 290, driving the rotating shaft 240 to rotate rapidly. The rotating shaft 240 drives all the rotating arms 230, the second connecting shaft 270 fixed to it, and the entire expansion mechanism 280 to swing powerfully downwards from a high position. The rotating and pressing action itself is a forced stopping physical action, which can strike or push away the climber. See the appendix for details. Figure 8 To be continued Figure 9 .

[0044] More importantly, during this process, the climber's hand, gripping the expansion mechanism 280, is forced to rotate, instantly triggering the rapid expansion of the expansion roller 284. The gripping space is forcibly stretched open, making it impossible to continue gripping. Under the combined effect of the downward swing force and the expansion repulsion force, the climber will lose all points of support and inevitably fall off the fence, completely losing any possibility of climbing over.

[0045] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A type of edge-sealed fence, characterized in that, include: The fence body includes a fence frame, on which a connecting protective net is installed; An anti-climbing unit is installed on the fence frame. The anti-climbing unit includes multiple sets of electric push rods installed on the fence frame. A fixed arm is installed on the telescopic end of the electric push rod, and a rotating arm is provided on the fixed arm. The anti-climb unit also includes a rotating shaft, a first connecting shaft, and a second connecting shaft; The rotating shaft is rotatably connected to each set of fixed arms via bearings, and multiple sets of the rotating arms are mounted on the rotating shaft; Multiple sets of the first connecting shafts are rotatably connected to each set of fixed arms via bearings, and rollers are mounted on the first connecting shafts; Multiple sets of second connecting shafts are fixedly connected to each set of rotating arms, and an expansion mechanism is provided on the second connecting shafts.

2. The edge-sealed fence according to claim 1, characterized in that, The fence frame includes two sets of horizontal connecting frames at the top and bottom and three sets of vertical connecting frames located between the two sets of horizontal connecting frames. The horizontal connecting frames are provided with edge-sealing parts, and the edge-sealing parts are provided with multiple sets of fastening bolts inside. The fastening bolts are used to thread and fix the connection between the horizontal connecting frames and the vertical connecting frames.

3. The edge-sealed fence according to claim 2, characterized in that, The edge-sealing component has a U-shaped structure and is used to wrap the connection between the horizontal and vertical connecting frames.

4. The edge-sealed fence according to claim 1, characterized in that, The expansion mechanism includes a connecting plate disposed between every two sets of adjacent rotating arms. The connecting plate is rotatably connected to the second connecting shaft via a bearing. A cam column is disposed between the connecting plates, and multiple sets of cam grooves are formed in a ring on the outer surface of the cam column. An expansion roller is slidably connected inside the cam groove, and a shaft is connected to the internal bearing of the expansion roller.

5. A type of edge-sealed fence according to claim 4, characterized in that, The cam groove is arranged with an inclined structure.

6. A type of edge-sealed fence according to claim 4, characterized in that, A baffle plate is installed on the outwardly protruding end of the cam groove.

7. A type of edge-sealed fence according to claim 4, characterized in that, The connecting plate has a sliding groove that matches the position of the shaft, and the sliding groove and the shaft are slidably connected.

8. A type of edge-sealed fence according to claim 7, characterized in that, A spring is installed inside the slide groove, with one end of the spring fixedly connected to the slide groove and the other end of the spring fixedly connected to the shaft.

9. A type of edge-sealed fence according to claim 4, characterized in that, One of the fixed arms is equipped with a motor, and the output shaft of the motor is fixedly connected to the rotating shaft.

10. A type of edge-sealed fence according to claim 4, characterized in that, The second connecting shaft has a built-in pressure sensor, and infrared beam sensors are also symmetrically arranged on the fence frame. The infrared beam sensors are electrically connected to the input terminal of the controller.

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