An automatically triggered three-level protection safety net

Abstract

The invention provides an automatic trigger type three-level protection safety net, including a frame, a safety net, and a transmission component. A human body sensor is installed at a certain distance above the frame. There are three safety nets, which are arranged longitudinally. Each safety net corresponds to a first suspension component and a second suspension component. The bottom of each first suspension component is connected to a first U-shaped hanging rod through a pressure sensor, which is connected to one side of the safety net through a hanging ring. The other side of the safety net is connected to the second suspension component through a hanging ring. The bottom of each second suspension component is connected to a second U-shaped hanging rod through a pressure sensor. Each second U-shaped hanging rod corresponds to a transmission component that drives it to slide on the frame. The automatic trigger type three-level protection safety net created by the invention solves the problem that the safety net has only one layer and a low safety factor.

Description

Technical Field

[0001] The invention belongs to the field of protective devices, and in particular relates to an automatically triggered three-level protective safety net. Background Art

[0002] The fall protection safety net is an important safety component of the high-altitude working hanging basket. When an accidental fall occurs during high-altitude working, it can catch the workers and ensure their safety. The existing safety nets generally have only one layer. Once they cannot bear the weight of the faller and break, they cannot provide protection for the safety of the workers. In addition, most of the existing safety nets are fixed to the mounting bracket, which is not convenient for loading and unloading, and is not conducive to the maintenance of the safety nets. Summary of the invention

[0003] In view of this, the present invention proposes an automatically triggered three-level protection safety net to solve the problem that the safety net has only one layer and a low safety factor.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A three-level protection safety net with automatic triggering comprises a frame, a safety net and a transmission component, wherein a human body sensor is installed at a certain distance above the frame, wherein there are three safety nets, which are arranged longitudinally, and each safety net is correspondingly provided with a first suspension component and a second suspension component, and the bottom of each first suspension component is connected with a first U-shaped hanging rod through a pressure sensor, the first U-shaped hanging rod is fixed to one side of the frame and connected to one side of the safety net through a hanging ring, and the other side of the safety net is connected to the second suspension component through a hanging ring, and the bottom of each second suspension component is connected with a second U-shaped hanging rod through a pressure sensor, and each second U-shaped hanging rod is correspondingly provided with a transmission component for driving it to slide on the frame, and fixing components for fixing the second suspension components are provided on both sides of the end of the frame away from the first hanging component, and blocks corresponding to the fixing components are provided at both ends of the second U-shaped hanging rod, and the transmission component, the human body sensor and the pressure sensor are all electrically connected to a PLC controller.

[0006] Furthermore, an automatically triggered three-level protection safety net is characterized in that: the frame includes a support rod, a fixed cross bar, and a slide rail, each safety net has a corresponding slide rail on both sides, one support rod is fixed at both ends of the slide rail, a fixed cross bar is fixedly connected between the two support rods located at the same end of the safety net, the first suspension component is perpendicular to the slide rail, and both ends are fixedly connected to the support rod, and the second suspension component has sliders fixed at both ends, which are slidably connected to the slide rail through the sliders.

[0007] Furthermore, a universal wheel is installed at the bottom of the support rod.

[0008] Furthermore, a support unit is provided at the bottom of the support rod, and the support unit includes a square sleeve, which is sleeved on the outside of the support rod, and two limiting holes are longitudinally opened on the side wall of the sleeve, and the support rod is provided with through holes corresponding to the limiting holes, and a support plate is fixed to the bottom of the square sleeve, and the support plate is provided with a through opening corresponding to the support rod.

[0009] Furthermore, the fixing assembly includes a trapezoidal block and a telescopic rod. A groove corresponding to the slide rail is formed on the support rod away from one end of the first suspension assembly. The bottom of the telescopic rod is fixedly connected to the bottom of the groove, and the top is fixedly connected to the trapezoidal block. The inclined surface of the trapezoidal block faces the slide rail. The telescopic rod is in the form of a large barrel with a small barrel. An elastic part is sleeved on the outside of the telescopic rod. A fixing plate is fixed to the upper part of the slider. The side of the fixing plate close to the safety net is fixedly connected to the first U-shaped hanging rod. A blocking block is fixed to one end of the fixing plate close to the fixing assembly. The side of the blocking block away from the fixing plate is provided with an inclined portion corresponding to the inclined surface of the trapezoidal block, and a square opening corresponding to the trapezoidal block is formed on the blocking block.

[0010] Furthermore, the fixing assembly also includes a cylinder, the bottom of the trapezoidal blocking block extends outward to form a baffle, the cylinder is fixed to the bottom of the groove, the telescopic rod of the cylinder passes through the through hole reserved by the baffle and is slidably connected to the connecting plate, the end of the telescopic rod of the cylinder is fixed with a baffle, and the cylinder is electrically connected to the PLC controller.

[0011] Furthermore, the transmission component includes a driving motor, a driving gear, a driven gear, a chain, and a screw. Each of the slide rails is provided with a screw along the length direction, and both ends of the screw are rotatably connected to the support rod through bearings. The end of the screw close to the first U-shaped hanging rod passes through the support rod, and the end of the screw located on one side of the first U-shaped hanging rod close to one end of the first U-shaped hanging rod is fixedly connected to the output shaft of the driving motor through a coupling. A gear is axially fixed on the position of the screw located between the driving motor and the support rod, and a driven gear is installed on the end of the screw located at the end of the first U-shaped hanging rod away from the driving motor through a bearing. The driving gear and the driven gear are directly provided with a chain, and a mounting shell is covered on the outside of the transmission component, the mounting shell is fixedly connected to the frame, the driving motor is fixedly connected to the inner wall of the mounting shell, and the driving motor is electrically connected to the PLC controller.

[0012] Furthermore, the first suspension component and the second suspension component each include a plurality of suspension units, the suspension units include a square connecting block, a hanging rod, and a pin, the square connecting block is provided with a mounting hole along the length direction, both ends of the connecting block are longitudinally provided with through holes, one end of the hanging rod is inserted into the mounting hole, both ends of the hanging rod are provided with through holes corresponding to the direction connecting blocks, the pin passes through the through holes of the square connecting block and the hanging rod, so that the square connecting block is fixedly connected to the hanging rod, and the plurality of suspension units are fixedly connected by inserting the hanging rod into the mounting holes of the adjacent square connecting blocks, a pressure sensor is fixedly fixed to the bottom of each square connecting block, the bottom of the pressure sensor is fixedly connected to the U-shaped hanging rod, each hanging rod is hung with a plurality of hanging rings, and each hanging ring is fixedly connected to the safety net.

[0013] Furthermore, the first U-shaped hanging rod and the second U-shaped hanging rod are both provided with openings corresponding to the hanging rods on one side close to the safety net.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) There are three levels of safety nets, and each level of safety net is equipped with a corresponding transmission component. When the pressure on the upper level exceeds the safety threshold, the safety net of the next level automatically opens, effectively preventing the safety net from breaking and causing injuries to the faller.

[0016] (2) The fixing assembly fixes the second suspension assembly, thereby ensuring that the safety net does not move when catching a falling person.

[0017] (3) The plurality of hanging units are connected by latches. The hanging ring can be taken out by simply removing the latches and separating the square connecting block from the hanging rod, thereby facilitating replacement of the safety net.

[0018] (4) A gravity sensor is installed at the bottom of each square connecting block. When the tension received by the corresponding hanging ring on the hanging rod connected to it fluctuates, the gravity sensor can detect the irregular change of force. When the hanging ring is disconnected, the pressure decreases sharply, and the sensor can sensitively sense whether the hanging ring is disconnected.

[0019] (5) Universal wheels are installed at the bottom of the support rod to facilitate the transportation and movement of the frame.

[0020] (6) Move the support unit downward so that the universal wheel is retracted into the square sleeve, and use the above method to fix the sleeve again so that the support plate fits the surface, thereby making the entire frame more stable and preventing movement.

[0021] (7) The first U-shaped hanging rod and the second U-shaped hanging rod are both provided with openings corresponding to the hanging rods on one side close to the safety net, so as to facilitate the connection between the hanging ring and the safety net and reduce the friction between the hanging ring or the safety net and the first U-shaped hanging rod and the second U-shaped hanging rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of an automatically triggered three-level protection safety net according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a frame, a first suspension component, and a second suspension component according to an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a support unit and a universal wheel according to an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a first U-shaped hanging rod and a second U-shaped hanging rod according to an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a fastening assembly according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a slider according to an embodiment of the present invention;

[0029] Figure 7 It is a partially enlarged schematic diagram of the transmission component according to the embodiment of the present invention;

[0030] Figure 8 A schematic diagram of a driven gear according to an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of a transmission assembly according to an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of a first suspension assembly according to an embodiment of the present invention;

[0033] Fig.11 A schematic diagram of a suspension unit according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1-frame; 11-support rod; 12-fixed crossbar; 13-slide rail; 14-groove; 15-universal wheel; 16-support unit; 161-square sleeve; 162-limiting hole; 163-support plate; 2-transmission assembly; 21-mounting shell; 22-slider; 221-threaded hole; 222-fixed plate; 23-block; 231-square opening; 232-inclined part; 24-drive motor; 241-driving gear; 242-driven gear; 243-baffle; 244-chain Strip; 25-screw; 3-first suspension component; 31-hanging ring; 32-first U-shaped hanging rod; 331-opening; 34-suspension unit; 341-square connecting block; 342-mounting hole; 343-through hole; 344-latch; 345-pressure sensor; 346-hanging rod; 4-second suspension component; 5-fixed component; 51-trapezoidal block; 52-telescopic rod; 53-elastic member; 54-connecting plate; 55-cylinder; 56-blocking plate; 6-safety net; 7-human body detection sensor. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] like Figure 1 , Figure 2 , Figure 4 As shown, an automatically triggered three-level protection safety net 6 includes a frame 1, a safety net 6, and a transmission component 2. A human body sensor is installed at a certain distance above the frame 1 with a universal wheel 15. There are three safety nets 6 with universal wheels 15, and the three safety nets 6 with universal wheels 15 are arranged longitudinally. Each safety net 6 is correspondingly provided with a first suspension component 3 and a second suspension component 4. The bottom of each first suspension component 3 with universal wheels 15 is connected to a first U-shaped hanging rod 32 through a pressure sensor 345. The first U-shaped hanging rod 32 with universal wheels 15 is fixed to one side of the frame 1 with universal wheels 15, and is connected to one side of the safety net 6 with universal wheels 15 through a hanging ring 31. The other side of the safety net 6 with universal wheels 15 is connected to the second hanging rod 4 through a hanging ring. 31 is connected to the second suspension component 4 with the universal wheel 15, and the bottom of each second suspension component 4 with the universal wheel 15 is connected to the second U-shaped hanging rod through the pressure sensor 345, and each second U-shaped hanging rod with the universal wheel 15 is correspondingly provided with a transmission component 2 that drives it to slide on the frame 1 with the universal wheel 15, and the frame 1 with the universal wheel 15 is provided with a fixing component 5 for fixing the second suspension component 4 with the universal wheel 15 on both sides of the end away from the first suspension component 3 with the universal wheel 15, and the two ends of the second U-shaped hanging rod with the universal wheel 15 are provided with a card block 23 corresponding to the fixing component 5 with the universal wheel 15, and the transmission component 2 with the universal wheel 15, the human body sensor, and the pressure sensor 345 are all electrically connected to the PLC controller. The human body sensor is set at a distance of at least four meters from the safety net 6. When the human body sensor detects that someone has fallen, it sends a signal to the PLC controller. The PLC controller controls the transmission component 2 corresponding to the top safety net 6 to work. The transmission component 2 drives the second suspension component 4 of the top safety net 6 to move to the other end of the frame 1, so that the folded safety net 6 is opened, and the fixing component 5 fixes the second U-shaped hanging rod to fix the safety net 6.

[0041] like Figure 1 to Figure 2As shown, the frame 1 with universal wheels 15 includes a support rod 11, a fixed cross rod 12, and a slide rail 13. A slide rail 13 is correspondingly provided on both sides of each safety net 6. A support rod 11 with universal wheels 15 is fixed at both ends of the slide rail 13 with universal wheels 15. A fixed cross rod 12 is fixedly connected between the two support rods 11 at the same end of the safety net 6 with universal wheels 15. The first suspension component 3 with universal wheels 15 is perpendicular to the slide rail 13 with universal wheels 15, and its two ends are fixedly connected to the support rod 11 with universal wheels 15. The second suspension component 4 with universal wheels 15 is fixed with sliders 22 at both ends, and is slidably connected to the slide rail 13 with universal wheels 15 through the sliders 22. When the human body sensing sensor does not detect that someone has fallen, the first suspension component 3 and the second suspension component 4 corresponding to the same safety net 6 are brought close to each other, so that the safety net 6 is folded to prevent debris from falling on the safety net 6 or unnecessary damage to the safety net 6 caused by environmental factors. Only when the human body sensor senses that a person has fallen, the second suspension component 4 will be driven by the transmission component 2 to move to the end away from the first suspension component 3 to open the safety net 6.

[0042] like Figures 1 to 3 As shown, a universal wheel 15 is installed at the bottom of the support rod 11 to facilitate the transportation and movement of the frame 1.

[0043] like Figures 1 to 3 As shown, a support unit 16 is also provided at the bottom of the support rod 11 with the universal wheel 15, and the support unit 16 with the universal wheel 15 includes a square sleeve 161, and the square sleeve 161 with the universal wheel 15 is sleeved on the outside of the support rod 11 with the universal wheel 15, and two limiting holes 162 are longitudinally opened on the side wall of the sleeve with the universal wheel 15, and a through hole 343 corresponding to the limiting hole 162 with the universal wheel 15 is opened on the support rod 11 with the universal wheel 15, and a support plate 163 is also fixed at the bottom of the square sleeve 161 with the universal wheel 15, and a through opening corresponding to the support rod 11 with the universal wheel 15 is opened on the support plate 163 with the universal wheel 15. When the frame 1 needs to be moved or transported, the support unit 16 is folded upwards and fixed by screws that penetrate the square sleeve 161 and the through hole 343 of the support rod 11 in sequence, so that the universal wheel 15 is exposed. After being transported to the specified position, the support unit 16 is moved downward, and the universal wheel 15 is retracted into the square sleeve 161. The sleeve is fixed again using the above method, so that the support plate 163 fits the surface, thereby making the entire frame 1 more stable and avoiding movement.

[0044] like Figure 5 , Figure 6As shown, the fixing assembly 5 with the universal wheel 15 includes a trapezoidal block 23 and a telescopic rod 52. A groove 14 corresponding to the slide rail 13 with the universal wheel 15 is opened on the support rod 11 with the universal wheel 15 installed away from one end of the first suspension assembly 3 with the universal wheel 15 installed. The bottom of the telescopic rod 52 with the universal wheel 15 installed is fixedly connected to the bottom of the groove 14 with the universal wheel 15 installed, and the top is fixedly connected to the trapezoidal block 23 with the universal wheel 15 installed. The inclined surface of the trapezoidal block 23 with the universal wheel 15 installed faces the slide rail 13 with the universal wheel 15 installed. The telescopic rod 52 with the universal wheel 15 installed is in the form of a large barrel with a small barrel, and the telescopic rod 52 with the universal wheel 15 installed is covered with an elastic member on the outside 53, a fixing plate 222 is fixed on the upper part of the slider 22 with the universal wheel 15, and the fixing plate 222 with the universal wheel 15 is fixedly connected to the first U-shaped hanging rod 32 with the universal wheel 15 on one side close to the safety net 6 with the universal wheel 15, and a clamping block 23 is fixed to one end of the fixing plate 222 with the universal wheel 15 close to the clamping assembly 5 with the universal wheel 15, and an inclined portion 232 corresponding to the inclined surface of the trapezoidal clamping block 23 with the universal wheel 15 is provided on the side of the clamping block 23 with the universal wheel 15 away from the fixing plate 222 with the universal wheel 15, and a square opening 231 corresponding to the trapezoidal clamping block 23 with the universal wheel 15 is opened on the clamping block 23 with the universal wheel 15. The transmission component 2 drives the sliders 22 located at both ends of the first U-shaped hanging rod 32 to move forward continuously. When the inclined portion 232 of the block 23 contacts the inclined surface of the trapezoidal block 23, the block 23 continues to move forward. The inclined surface of the trapezoidal block 23 is subjected to the downward pressure of the inclined portion 232 of the block 23. The telescopic rod 52 contracts downward, and the elastic member 53 is squeezed downward. When the square opening 231 moves to the top of the trapezoidal block 23, the pressure on the trapezoidal block 23 disappears. Under the elastic force of the elastic member 53, the trapezoidal block 23 is pushed upward and extends into the square opening 231, completing the clamping of the block 23, thereby fixing the second U-shaped hanging rod to the end of the frame 1 away from the first U-shaped hanging rod 32.

[0045] like Figure 5As shown, the fixing assembly 5 with the universal wheel 15 also includes a cylinder 55. The bottom of the trapezoidal block 23 with the universal wheel 15 extends outward to form a baffle 56. The cylinder 55 with the universal wheel 15 is fixed to the bottom of the groove 14 with the universal wheel 15. The telescopic rod 52 with the cylinder 55 with the universal wheel 15 passes through the through hole 343 reserved for the baffle 56 with the universal wheel 15 and is slidably connected to the connecting piece 54 with the universal wheel 15. The end of the telescopic rod 52 with the cylinder 55 with the universal wheel 15 is fixed with a baffle 56. The cylinder 55 with the universal wheel 15 is electrically connected to the PLC controller. After the safety net 6 is used, the telescopic rod 52 of the cylinder 55 is controlled by the PLC controller to retract downward, thereby pulling down the trapezoidal block 23. Then the PLC controller controls the transmission component 2 to drive the second suspension component 4 back to the initial position, and the telescopic rod 52 of the cylinder 55 is extended upward to the initial position, and then the trapezoidal block 23 returns to the initial position under the action of the spring.

[0046] like Figures 7 to 9As shown, the transmission assembly 2 with a universal wheel 15 includes a driving motor 24, a driving gear 241, a driven gear 242, a chain 244, and a screw 25. Each slide rail 13 with a universal wheel 15 is provided with a screw 25 along the length direction. Both ends of the screw 25 with the universal wheel 15 are rotatably connected to the support rod 11 with the universal wheel 15 through bearings. One end of the screw 25 with the universal wheel 15 close to the first U-shaped hanging rod 32 with the universal wheel 15 passes through the support rod 11 with the universal wheel 15. The end of the screw 25 located on one side of the first U-shaped hanging rod 32 with the universal wheel 15 close to the first U-shaped hanging rod 32 with the universal wheel 15 is fixedly connected to the output shaft of the driving motor 24 with the universal wheel 15 through a coupling. The screw rod 25 is located between the driving motor 24 on which the universal wheel 15 is installed and the support rod 11 on which the universal wheel 15 is installed, and a gear is axially fixed thereon; the end of the screw rod 25 located at the first U-shaped hanging rod 32 on which the universal wheel 15 is installed and away from one end on which the driving motor 24 on which the universal wheel 15 is installed is installed with a driven gear 242 through a bearing; the driving gear 241 on which the universal wheel 15 is installed and the driven gear 242 are directly provided with a chain 244; the outer portion of the transmission component 2 on which the universal wheel 15 is installed is covered with a mounting shell 21; the mounting shell 21 on which the universal wheel 15 is installed is fixedly connected to the frame 1 on which the universal wheel 15 is installed; the driving motor 24 on which the universal wheel 15 is installed is fixedly connected to the inner wall of the mounting shell 21 on which the universal wheel 15 is installed; the driving motor 24 on which the universal wheel 15 is installed is electrically connected to the PLC controller. When the human body detection sensor 7 detects that a human body has fallen, the PLC controller controls the driving motor 24 to run in the forward direction, driving the screw rod 25 and the driving gear 241 connected thereto to rotate, and the driving gear 241 drives the driven wheel to rotate synchronously therewith through the chain 244, and the driven gear 242 drives the screw rod 25 connected thereto to rotate, thereby realizing the synchronous movement of the sliders 22 on both sides, and driving the second U-shaped hanging rod to move forward.

[0047] like Figure 10 to Figure 11As shown, the first suspension assembly 3 and the second suspension assembly 4 with the universal wheel 15 are both provided with a plurality of suspension units 34. The suspension unit 34 with the universal wheel 15 includes a square connection block 341, a hanging rod 346, and a latch 344. The square connection block 341 with the universal wheel 15 is provided with a mounting hole 342 along the length direction. Through holes 343 are longitudinally provided at both ends of the connection block with the universal wheel 15. One end of the hanging rod 346 with the universal wheel 15 is inserted into the mounting hole 342 with the universal wheel 15. Both ends of the hanging rod 346 with the universal wheel 15 are provided with through holes 343 corresponding to the direction connection block with the universal wheel 15. The latch 344 with the universal wheel 15 penetrates the square connection block with the universal wheel 15. The through hole 343 of the block 341 and the hanging rod 346 fixes the square connecting block 341 with the universal wheel 15 and the hanging rod 346 with the universal wheel 15 in fixed connection. Multiple suspension units 34 with universal wheels 15 are fixedly connected by inserting the hanging rod 346 with the universal wheel 15 into the mounting hole 342 of the adjacent square connecting block 341. A pressure sensor 345 with the universal wheel 15 is fixedly installed at the bottom of each square connecting block 341 with the universal wheel 15. The bottom of the pressure sensor 345 with the universal wheel 15 is fixedly connected to the U-shaped hanging rod 346. Multiple hanging rings 31 are hung on each hanging rod 346 with the universal wheel 15, and each hanging ring 31 is fixedly connected to the safety net 6. The sensor continuously transmits the monitoring data to the PLC controller. When the pressure value is greater than the preset safety threshold, the PLC controller controls the second layer of safety net 6 to open, and provides the second layer of protection for the faller. When the pressure value monitored by the second layer pressure sensor 345 is greater than the safety threshold, the PLC controller controls the third layer of safety net 6 to open. Since each square connection block 341 has a pressure sensor 345 at the bottom, and each hanging rod 346 is connected with at least two hanging rings 31, when the individual hanging rings 31 are separated from the safety net 6 or the safety net 6 is broken due to excessive load, the data transmitted by the pressure sensor 345 fluctuates irregularly. At this time, the PLC controller will also control the lower layer of safety net 6 to open to protect the faller. Each square connection block 341 is installed with a gravity sensor at the bottom. When the tension received by the corresponding hanging ring 31 on the hanging rod 346 connected thereto fluctuates, the gravity sensor can detect the irregular change of force. When the hanging ring 31 is disconnected, the pressure decreases sharply, and then it can sensitively sense whether the hanging ring 31 is disconnected.

[0048] like Figure 4 , Fig.10 As shown, the first U-shaped hanging rod 32 and the second U-shaped hanging rod with the universal wheel 15 are both provided with an opening 331 corresponding to the hanging rod 346 with the universal wheel 15 installed on one side close to the safety net 6 with the universal wheel 15 installed, so as to facilitate the connection between the hanging ring 31 and the safety net 6 and reduce the friction between the hanging ring 31 or the safety net 6 and the first U-shaped hanging rod 32 and the second U-shaped hanging rod.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatically triggered three-level protection safety net, Features: The invention comprises a frame (1), a safety net (6), and a transmission component (2); a human body sensor is installed at a certain distance above the frame (1); there are three safety nets (6), which are arranged longitudinally; each safety net (6) is correspondingly provided with a first suspension component (3) and a second suspension component (4); the bottom of each first suspension component (3) is connected to a first U-shaped hanging rod (32) through a pressure sensor (345); the first U-shaped hanging rod (32) is fixed to one side of the frame (1) and is connected to one side of the safety net (6) through a hanging ring (31); the other side of the safety net (6) is connected to the second suspension component (4) through a hanging ring (31); the bottom of each second suspension component (4) is connected to a second U-shaped hanging rod through a pressure sensor (345); each second U-shaped hanging rod is correspondingly provided with a transmission component (2) that drives it to slide on the frame (1); the transmission component (2), the human body sensor, and the pressure sensor (345) are all electrically connected to a PLC controller; The frame (1) comprises a support rod (11), a fixed cross rod (12), and a slide rail (13); each safety net (6) is provided with a slide rail (13) on both sides; one support rod (11) is fixed at both ends of the slide rail (13); a fixed cross rod (12) is fixedly connected between two support rods (11) located at the same end of the safety net (6); the first suspension component (3) is perpendicular to the slide rail (13), and both ends are fixedly connected to the support rod (11); and the second suspension component (4) is fixed with a slider (22) at both ends, and is slidably connected to the slide rail (13) via the slider (22); The transmission assembly (2) comprises a driving motor (24), a driving gear (241), a driven gear (242), a chain (244), and a screw rod (25). Each of the slide rails (13) is provided with a screw rod (25) along the length direction. Both ends of the screw rod (25) are rotatably connected to the support rod (11) through bearings. One end of the screw rod (25) close to the first U-shaped hanging rod (32) passes through the support rod (11). The end of the screw rod (25) located on one side of the first U-shaped hanging rod (32) close to the first U-shaped hanging rod (32) is fixedly connected to the output shaft of the driving motor (24) through a coupling. The screw rod (25) is located between the driving motor (24) and the support rod (11), and a driving gear (241) is axially fixed thereto; the end of the screw rod (25) located at the end of the first U-shaped hanging rod (32) away from the driving motor (24) is installed with a driven gear (242) through a bearing; a chain (244) is provided between the driving gear (241) and the driven gear (242); the transmission component (2) is externally covered with a mounting shell (21); the mounting shell (21) is fixedly connected to the frame (1); the driving motor (24) is fixedly connected to the inner wall of the mounting shell (21); the driving motor (24) is fixedly connected to the inner wall of the mounting shell (21); and the driving motor (2 4) is electrically connected to a PLC controller; the first suspension component (3) and the second suspension component (4) each include a plurality of suspension units (34), the suspension unit (34) including a square connection block (341), a hanging rod (346), and a latch (344), the square connection block (341) is provided with a mounting hole (342) along the length direction, both ends of the square connection block (341) are provided with through holes in the longitudinal direction, one end of the hanging rod (346) is inserted into the mounting hole (342), both ends of the hanging rod (346) are provided with through holes corresponding to the square connection block (341), and the latch (344) passes through the square connection block (341). The through hole of the square connection block (341) and the through hole of the hanging rod (346) are used to fix the square connection block (341) and the hanging rod (346). The plurality of hanging units (34) are fixedly connected by inserting the hanging rod (346) into the mounting hole (342) of the adjacent square connection block (341). A pressure sensor (345) is fixedly connected to the bottom of each square connection block (341). The bottom of the pressure sensor (345) is fixedly connected to the U-shaped hanging rod (346). Each hanging rod (346) is hung with a plurality of hanging rings (31), and each hanging ring (31) is fixedly connected to the safety net (6).

2. According to claim 1, an automatic trigger type three-level protection safety net, Features: A universal wheel (15) is installed at the bottom of the support rod (11).

3. According to claim 1, an automatic trigger type three-level protection safety net, Features: A support unit (16) is also provided at the bottom of the support rod (11), and the support unit (16) comprises a square sleeve (161), the square sleeve (161) is sleeved on the outside of the support rod (11), two limiting holes (162) are longitudinally opened on the side wall of the sleeve, and through holes corresponding to the limiting holes (162) are opened on the support rod (11), and a support plate (163) is also fixed at the bottom of the square sleeve (161), and a through opening corresponding to the support rod (11) is opened on the support plate (163).

4. The automatic trigger type three-level protection safety net according to claim 1, Features: The frame (1) is provided with fixing components (5) for fixing the second suspension component (4) on both sides of the end away from the first suspension component (3); the second U-shaped hanging rod is provided with a clamping block (23) corresponding to the fixing component (5); the fixing component (5) comprises a trapezoidal clamping block (51) and a telescopic rod (52); the support rod (11) at the end away from the first suspension component (3) is provided with a groove (14) corresponding to the slide rail (13); the bottom of the telescopic rod (52) is fixedly connected to the bottom of the groove (14); the top of the telescopic rod (52) is fixedly connected to the trapezoidal clamping block (51); the inclined surface of the trapezoidal clamping block (51) faces the slide rail (13); The telescopic rod (52) is in the form of a large barrel with a small barrel, and an elastic member (53) is sleeved on the outside of the telescopic rod (52). A fixing plate (222) is fixed on the upper part of the slider (22), and the fixing plate (222) is fixedly connected to the second U-shaped hanging rod on the side close to the safety net (6). A clamping block (23) is fixed on one end of the fixing plate (222) close to the clamping assembly (5), and an inclined portion (232) corresponding to the inclined surface of the trapezoidal clamping block (51) is provided on the side of the clamping block (23) away from the fixing plate (222), and a square opening (231) corresponding to the trapezoidal clamping block (51) is opened on the clamping block (23).

5. According to claim 4, an automatic trigger type three-level protection safety net, Features: The clamping assembly (5) also includes a cylinder (55), the bottom of the trapezoidal clamping block (51) extends outward to form a connecting piece (54), the cylinder (55) is fixed to the bottom of the groove (14), the lifting rod of the cylinder (55) passes through the connecting piece (54) through a through hole reserved in the connecting piece (54) and is slidably connected to the connecting piece (54), a blocking piece (56) is fixed to the end of the lifting rod of the cylinder (55), and the cylinder (55) is electrically connected to the PLC controller.

6. The automatic trigger type three-level protection safety net according to claim 1, Features: The first U-shaped hanging rod (32) and the second U-shaped hanging rod are both provided with openings (331) corresponding to the hanging rod (346) on one side close to the safety net (6).

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