Light plastic safety fence

Abstract

The invention discloses a light plastic safety fence which comprises a plurality of fence frames, a mounting table fixed to the fence frames, a hanging rod and a warning suite, the warning suite comprises a warning tape, a sleeve, a rotating shaft, a coil spring and a mounting base, and the rotating shaft is rotationally mounted on the mounting base; the coil spring is arranged between the mounting seat and the rotating shaft, one end of the coil spring acts on the mounting seat, the other end of the coil spring acts on the rotating shaft, one end of the warning tape is wound on the rotating shaft, and the other end of the warning tape is fixedly connected with the sleeve; the fixing device comprises two clamping plates capable of moving oppositely and a driving mechanism used for driving the two clamping plates to clamp the rotating shaft. According to the fence, the pulling force on the fence frame can be reduced, and therefore the situation that the fence topples over due to external force is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fences, and in particular to a lightweight plastic safety fence. Background Art

[0002] When working in urban engineering, it is necessary to delineate the scope of work and then take safety protection measures to isolate it. Since there is a certain high-risk probability in live working and working points, it is even more necessary to take fences for safety protection and warn non-working personnel outside the fence. At present, for the convenience of use, safety fences are usually made of light plasticized materials. Safety fences usually include multiple fence frames, coil springs, rotating shafts, warning tapes, sleeves and hanging rods. One end of each fence frame is rotatably connected to a rotating shaft, and the other end of each fence frame is fixedly connected to a hanging rod. A coil spring is arranged between each rotating shaft and the corresponding fence frame, and the two ends of the coil spring are respectively fixedly connected to the rotating shaft and the fence frame. One end of the warning tape is wrapped around the rotating shaft, and the other end is fixedly connected to a sleeve. When in use, the sleeve is set on the hanging rod of another fence frame, so that the warning tape is pulled out to serve as a warning.

[0003] After the warning tape is pulled out, the coil spring continues to be in an elastic deformation state, thereby continuously pulling the hanging rod of the sleeve, that is, continuously generating pulling force on the fence frame. When pedestrians or vehicles touch the fence frame, it is more likely to cause the fence to topple over. Summary of the invention

[0004] The purpose of the present application is to provide a lightweight plastic safety fence for reducing the pulling force on the fence, thereby reducing the possibility of the fence toppling over due to external forces.

[0005] The light plastic safety fence provided in this application adopts the following technical solution:

[0006] A light plastic safety fence, comprising:

[0007] Fence frames, provided with a number of them;

[0008] The mounting platform and the hanging rod are both fixed on the fence frame;

[0009] A warning kit is installed on the mounting platform, each of the warning kits corresponds to one of the hanging rods on the adjacent fence frame, the warning kit comprises a warning tape, a sleeve, a rotating shaft, a coil spring and a mounting seat, the mounting seat is installed on the mounting platform, the rotating shaft is rotatably mounted on the mounting seat, the coil spring is arranged between the mounting seat and the rotating shaft and one end of the coil spring acts on the mounting seat and the other end acts on the rotating shaft, one end of the warning tape is wound around the rotating shaft and the other end is fixedly connected to the sleeve, and the sleeve can be sleeved on the corresponding hanging rod;

[0010] A fixing device is installed on the mounting platform and is used to limit the rotation of the rotating shaft. The fixing device includes two clamping plates that can move toward each other and a driving mechanism for driving the two clamping plates to clamp the rotating shaft.

[0011] Optionally, it further comprises a first elastic member, the mounting seat is slidably connected to the mounting platform, one end of the first elastic member acts on the mounting platform, and the other end acts on the mounting seat;

[0012] The driving mechanism includes a frame and a second elastic member, the two clamps are slidably connected to the frame, a limited space is set between the two clamps, and a second elastic member is set between the frame and one side of the two clamps facing away from each other. One end of the second elastic member acts on the frame and the other end acts on the corresponding clamp. The rotating shaft can slide to the limited space and be clamped by the two clamps.

[0013] Optionally, the rotating shaft includes a cylindrical portion and a prismatic portion, the cylindrical portion and the prismatic portion are connected to each other and rotate synchronously, and the warning tape is wound around the cylindrical portion;

[0014] The end faces of each clamping plate close to each other are fixedly connected to the limiting block, and each limiting block is provided with an inclined surface, and the prism part can slide into the limiting space through the inclined surface and be clamped by the two clamping plates.

[0015] Optionally, edge grooves are provided on the end surfaces of the two clamping plates that are close to each other, and the two edge grooves are arranged corresponding to each other and are adapted to the edge sizes of the prism parts.

[0016] Optionally, the fixing device further comprises a guide plate, the guide plate is arranged obliquely from top to bottom along the sliding direction of the prism portion and is fixed on the frame, and the guide plate is arranged between the two clamping plates;

[0017] The prism portion includes an insertion section and a limiting section, both of which are prism-shaped, and a telescopic groove is provided on the cylindrical portion, the telescopic groove is adapted to the insertion section, and the insertion section is slidably arranged in the telescopic groove;

[0018] A third elastic member is arranged between the inner wall of the telescopic slot and the insertion section, one end of the third elastic member acts on the insertion section, and the other end of the third elastic member acts on the inner wall of the telescopic slot. The limiting section can drive the insertion section to slide into the telescopic slot under the guidance of the guide plate.

[0019] Optionally, the fixing device further includes a first baffle, which is fixedly connected to an end surface of the guide plate close to the mounting platform and is used to limit the sliding of the limiting section.

[0020] Optionally, a second baffle is further included, wherein the second baffle is fixedly connected to the mounting platform, and a slot is formed on the second baffle for the warning tape to pass through, and the slot is smaller than the outer diameter of the sleeve.

[0021] Optionally, it further includes a first support, wherein two first supports are provided, and the two first supports are respectively provided on both sides of the fence frame and are inclined toward the length direction of the warning tape.

[0022] Optionally, it further includes a second support, at least two of which are provided and located between two of the first supports, and the arrangement directions of the two second supports are perpendicular to the arrangement directions of the two first supports.

[0023] The present application provides a splint and a second elastic member to clamp the rotating shaft through the splint, thereby limiting the rotation of the rotating shaft during the use of the warning kit, reducing the pulling force on the adjacent fence frame, and thus reducing the occurrence of the fence frame tipping over. If the sleeve is separated from the hanging rod due to external force, the warning tape will only fall near the fence frame due to gravity and will not be rewound due to the drive of the winding spring, thereby making it convenient for the operator to re-put the sleeve on the hanging rod without having to pull the warning tape two or three meters or even farther to re-put it on the adjacent fence frame.

[0024] The present application also sets limit blocks and angular grooves, so that the limit sections rotated to different states can be limited, and the limiting effect is better, which further increases the limiting effect on the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a lightweight plastic safety fence according to an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the coordination structure of the fixing device and the warning kit according to the embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the rotating shaft of the embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the structure of the fixing device of the embodiment of the present application.

[0029] In the figure, 1, fence frame; 2, mounting table; 21, slide groove; 22, first elastic member; 3, hanging rod; 4, warning kit; 41, warning tape; 42, sleeve; 43, rotating shaft; 431, cylindrical portion; 4311, telescopic slot; 4312, third elastic member; 432, prism portion; 4321, insertion section; 4322, limiting section; 44, mounting seat; 5, fixing device; 51, splint; 511, limiting block; 512, inclined plane; 52, driving mechanism; 521, second elastic member; 522, frame; 53, limiting space; 54, angular groove; 55, guide plate; 56, first baffle plate; 57, second baffle plate; 571, notch; 6, first support; 7, second support. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0031] A lightweight plastic safety fence, refer to Figure 1 , including a fence frame 1, a mounting platform 2, a hanging rod 3, a warning kit 4 and a fixing device 5. There are several fence frames 1, and each fence frame 1 is provided with several of the above-mentioned mounting platforms 2 and the above-mentioned hanging rods 3. In this embodiment, the several mounting platforms 2 are all located on one side of the fence frame 1, and the several hanging rods 3 are all located on the other side of the fence frame 1. The several mounting platforms 2 and the several hanging rods 3 are evenly spaced along the vertical direction.

[0032] Several mounting platforms 2 are arranged in one-to-one correspondence with several hanging rods 3 on adjacent fence frames 1. A warning kit 4 is provided on each mounting platform 2. When live working is required, several fence frames 1 are used to surround the working area, and adjacent fence frames 1 are connected through the warning kit 4. Non-working personnel are warned through the warning kit 4 and the fence frames 1.

[0033] Reference Figure 2Specifically, the warning kit 4 includes a warning tape 41, a sleeve 42, a rotating shaft 43, a coil spring (not shown in the figure) and a mounting seat 44. The mounting seat 44 is connected to the mounting platform 2, and the rotating shaft 43 is rotatably connected to the mounting seat 44. The coil spring is arranged between the mounting seat 44 and the rotating shaft 43, and one end acts on the mounting seat 44 and the other end acts on the rotating shaft 43. In this embodiment, the coil spring is sleeved on the rotating shaft 43 and one end is fixed on the mounting seat 44 and the other end is fixed on the rotating shaft 43. The rotation of the rotating shaft 43 drives the coil spring to twist and produce elastic deformation. One end of the warning tape 41 is wound around the rotating shaft 43, and the other end is fixedly connected to the sleeve 42. The sleeve 42 is adapted to the corresponding hanging rod 3 and can be mounted on the corresponding hanging rod 3. When the warning kit 4 is used, the warning tape 41 is pulled to drive the rotating shaft 43 to rotate, and the coil spring is twisted, so that the sleeve 42 is mounted on the hanging rod 3 on the adjacent fence frame 1, so that the warning tape 41 is connected to the adjacent fence frame 1, thereby warning non-operating personnel. When the warning kit 4 needs to be recovered, the sleeve 42 is removed from the hanging rod 3, and the sleeve 42 is released at this time, and the coil spring is restored, thereby driving the rotating shaft 43 to rotate, and realizing the rewinding of the warning tape 41.

[0034] Furthermore, a slide groove 21 is provided on the mounting platform 2, and a first elastic member 22 is provided in the slide groove 21. The mounting seat 44 is slidably provided in the slide groove 21. One end of the first elastic member 22 acts on the inner wall of the slide groove 21, and the other end acts on the mounting seat 44. In the present embodiment, the first elastic member 22 adopts a spring and one end is fixed on the inner wall of the slide groove 21, and the other end is fixed on the mounting seat 44. The elastic force of the first elastic member 22 is greater than the elastic force of the coil spring. When the warning tape 41 is normally pulled, the first elastic member 22 limits the sliding of the mounting seat 44. When the warning tape 41 is suddenly pulled with force, the mounting seat 44 is driven to slide through the rotating shaft 43.

[0035] The fixing device 5 is provided on each mounting platform 2. The fixing device 5 is used to limit the rotation of the rotating shaft 43. The working process is as follows: when the sleeve 42 on the warning tape 41 approaches the adjacent fence frame 1, the sleeve 42 is pulled suddenly and forcefully, so that the warning tape 41 drives the mounting seat 44 to slide while driving the rotating shaft 43 to rotate, so that the rotating shaft 43 slides into the fixing device 5, and the rotating shaft 43 is limited by the fixing device 5 to limit the rotation of the rotating shaft 43, thereby limiting the winding of the warning tape 41 by the rotating shaft 43, and then slightly adjusting the position of the adjacent fence frame 1, and then putting the sleeve 42 on the hanging rod 3, and the installation of the warning tape 41 is completed at this time. When the warning tape 41 needs to be rolled up, the sleeve 42 is first removed from the hanging rod 3, and then the sleeve 42 is pulled suddenly, thereby driving the supporting platform and the rotating shaft 43 to continue sliding, so that the fixing device 5 releases the limit on the rotating shaft 43, releases the sleeve 42, and the winding spring drives the rotating shaft 43 to rotate, thereby realizing the rolling of the warning tape 41, and the first elastic member 22 drives the supporting platform to reset, waiting for the next use.

[0036] Since the warning tape 41 does not exert a pulling force on the adjacent fence frames 1, it is not easy to cause the fence frame 1 to fall down when pedestrians or other vehicles touch the fence frame 1. The specific reason is as follows: when the fixing device 5 is not provided, when pedestrians or other vehicles touch the fence frame 1, the fence frame 1 is simultaneously subjected to the pulling force of the warning tape 41 and the pushing force of the pedestrians or other vehicles. When the fixing device 5 is provided, the pulling force of the warning tape 41 is reduced, thereby reducing the occurrence of the fence frame 1 falling down. Furthermore, if the sleeve 42 is separated from the hanging rod 3 under the action of an external force, the warning tape 41 will only fall near the fence frame 1 under the action of gravity, and will not be rewound due to the drive of the coil spring, thereby making it convenient for the operator to re-install the sleeve 42 on the hanging rod 3, without having to re-pull the warning tape 41 two or three meters or even farther to install it on the adjacent fence frame 1.

[0037] Furthermore, a rubber sleeve (not shown) is sleeved on the hanging rod 3, and the sleeve 42 is sleeved on the rubber sleeve. The rubber sleeve is deformed, thereby increasing the connection stability between the hanging rod 3 and the sleeve 42 and reducing the separation of the sleeve 42 from the hanging rod 3.

[0038] Reference Figure 3 and Figure 4 The fixing device 5 includes two clamping plates 51 that can move toward each other and a driving mechanism 52 for driving the two clamping plates 51 to clamp the rotating shaft 43. There is a limiting space 53 between the two clamping plates 51. The warning tape 41 pulls the supporting platform to move, so that the supporting platform drives the rotating shaft 43 to move into the limiting space 53, so that the two clamping plates 51 clamp the rotating shaft 43 to limit the rotation of the rotating shaft 43, that is, to limit the winding of the warning tape 41.

[0039] Specifically, the driving mechanism 52 includes a second elastic member 521 and a frame 522. The frame 522 is fixedly connected to the mounting table 2. The second elastic member 521 is arranged between the mutually opposite sides of the two clamping plates 51 and the frame 522. One end of the second elastic member 521 acts on the frame 522, and the other end acts on the corresponding clamping plate 51. In this embodiment, the second elastic member 521 is a spring, one end of the spring is fixed to the clamping plate 51, and the other end of the spring is fixed to the frame 522.

[0040] The end surfaces of the clamping plates 51 that are close to each other are fixedly connected to the limiting blocks 511, and each limiting block 511 is provided with an inclined surface 512. When the rotating shaft 43 slides into the limiting space 53, the rotating shaft 43 pushes the two clamping plates 51 to move away from each other through the inclined surface 512. When the rotating shaft 43 enters the limiting space 53, each second elastic member 521 drives the corresponding clamping plate 51 to slide, so that the two clamping plates 51 clamp the rotating shaft 43, and the first elastic member 22 pulls the supporting platform to slide, so that the rotating shaft 43 abuts against the limiting block 511, and the limiting block 511 limits the resetting of the rotating shaft 43.

[0041] Specifically, the rotating shaft 43 includes a cylindrical portion 431 and a prism portion 432. The prism portion 432 and the cylindrical portion 431 are connected to each other and rotate synchronously. The warning tape 41 is wound around the cylindrical portion 431. The prism portion 432 includes an insertion section 4321 and a limiting section 4322. The insertion section 4321 and the limiting section 4322 are both prism-shaped. A telescopic groove 4311 is formed on the top surface of the cylindrical portion 431. The cross section of the telescopic groove 4311 is prismatic and matches the insertion section 4321. The insertion section 43 21 is slidably inserted into the telescopic slot 4311 to realize the synchronous rotation function of the prism part 432 and the cylindrical part 431. A third elastic member 4312 is provided in the telescopic slot 4311. One end of the third elastic member 4312 acts on the insertion section 4321 and the other end acts on the inner wall of the telescopic slot 4311. In this embodiment, the third elastic member 4312 is a spring, and one end of the spring is fixed on the inner wall of the telescopic slot 4311, and the other end of the spring is fixed on the insertion section 4321. The telescopic function of the prism part 432 is realized through the cooperation of the insertion section 4321 and the third elastic member 4312.

[0042] When the rotating shaft 43 enters the limiting space 53 , that is, the limiting section 4322 is located in the limiting space 53 , since the limiting section 4322 is prismatic, it is less likely to rotate after being clamped by the two clamping plates 51 , thereby further increasing the limiting effect on the rotating shaft 43 .

[0043] The end surfaces of the two clamping plates 51 that are close to each other are both provided with angular grooves 54, and the two angular grooves 54 are arranged corresponding to each other and are adapted to the angular size of the prism portion 432, that is, the angular size of the limiting section 4322. Because in the process of suddenly pulling the warning tape 41, the rotating shaft 43 will be pulled and rotated by the warning tape 41 while driving the bearing platform to slide, so the state of the limiting section 4322 when sliding into the limiting space 53 is uncertain.

[0044] When the limiting section 4322 slides into the limiting space 53 and the two symmetrical end faces of the limiting section 4322 are parallel to the two clamping plates 51 or the angle between the two end faces and the clamping plates 51 is small, when the two clamping plates 51 clamp the limiting section 4322, they will abut against the end face of the limiting section 4322, thereby limiting the rotation of the limiting section 4322, and the limiting effect is better.

[0045] When the limiting segment 4322 slides into the limiting space 53 and the angle between the two mutually symmetrical end faces of the limiting segment 4322 and the clamping plate 51 is relatively large, the first elastic member 22 pulls the supporting platform to move, which will cause one edge of the limiting segment 4322 to be inserted into the prismatic groove first, and the movement of the limiting segment 4322 is limited by the cooperation between the edge of the limiting segment 4322 and the prismatic groove. At this time, the other edge of the limiting segment 4322 will be inserted into another prismatic groove due to the rotation of the limiting segment 4322, thereby limiting the limiting segment 4322 and ensuring that the limiting segment 4322 can be stably restricted from rotating no matter what form it enters into the limiting space 53.

[0046] The fixing device 5 also includes a guide plate 55, which is arranged to be tilted from top to bottom along the sliding direction of the prism portion 432 and fixed on the frame 522. When the limiting section 4322 is located in the limiting space 53, the limiting section 4322 is restricted from rotating. When the warning tape 41 needs to be rolled up, the warning tape 41 is pulled suddenly, and the limiting section 4322 slides toward the direction close to the guide plate 55 and slides downward under the drive of the guide plate 55, so that the insertion section 4321 slides into the telescopic groove 4311, so that the limiting section 4322 slides downward out of the limiting space 53, and the two clamping plates 5 1 will continue to approach each other under the drive of the second elastic member 521, so that the width of the limiting space 53 is smaller than the width of the limiting segment 4322, so that the limiting segment 4322 abuts against the bottom surface of the clamping plate 51. At this time, the first elastic member 22 pulls the bearing platform to reset, driving the cylindrical segment to reset. When the limiting segment 4322 is separated from the clamping plate 51, the insertion segment 4321 is reset under the drive of the third elastic member 4312, thereby driving the limiting segment 4322 to reset. At this time, since the limiting segment 4322 is not restricted from rotating, the coil spring is reset, driving the cylindrical segment to rotate, and realizing the winding of the warning tape 41.

[0047] Furthermore, the fixing device 5 also includes a first baffle plate 56, which is fixedly connected to the end surface of the guide plate 55 close to the mounting table 2. When the limit section 4322 slides to the bottom surface of the guide plate 55, the operator may pull too much force, causing the limit section 4322 to slide excessively. By setting the first baffle plate 56, the sliding of the limit section 4322 is limited, reducing the occurrence of excessive sliding of the limit section 4322.

[0048] Furthermore, a second baffle 57 is provided on the mounting table 2. The second baffle 57 is fixed on the mounting table 2 and is located at one end of the frame 522 away from the rotating shaft 43. A slot 571 is opened on the second baffle 57 for the warning tape 41 to pass through. The size of the slot 571 is smaller than the outer diameter of the sleeve 42. When the warning tape 41 is rolled up, the second baffle 57 is used to limit the sleeve 42 from being rolled up into the frame 522, thereby facilitating the next removal of the sleeve 42.

[0049] Furthermore, both ends of the bottom surface of the fence frame 1 are fixedly connected to a first support 6, and the first support 6 is inclined from top to bottom along the length direction of the warning tape 41. Through the two first supports 6, the fence frame 1 is triangularly supported, which increases the stability of the fence frame 1 and reduces the possibility of the fence frame 1 tipping over due to pulling the warning tape 41.

[0050] Furthermore, a second support 7 is provided on the bottom surface of the fence frame 1, and at least two second supports 7 are provided. The setting direction of the second supports 7 is perpendicular to the setting direction of the first supports 6, thereby further reducing the possibility of the fence frame 1 tipping over.

[0051] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lightweight plastic safety fence, characterized in that: include: A plurality of fence frames (1) are provided; The mounting platform (2) and the hanging rod (3) are both arranged on the fence frame (1); A warning kit (4) is arranged on the mounting platform (2), the warning kit (4) comprising a warning tape (41), a sleeve (42), a rotating shaft (43), a coil spring and a mounting seat (44), the mounting seat (44) being mounted on the mounting platform (2), the rotating shaft (43) being rotatably mounted on the mounting seat (44), the coil spring being arranged between the mounting seat (44) and the rotating shaft (43) with one end acting on the mounting seat (44) and the other end acting on the rotating shaft (43), one end of the warning tape (41) being wound around the rotating shaft (43) and the other end being fixedly connected to the sleeve (42), and the sleeve (42) being able to be sleeved on a corresponding hanging rod (3); A fixing device (5) is mounted on the mounting platform (2) and is used to limit the rotation of the rotating shaft (43). The fixing device (5) comprises two clamping plates (51) that can move towards each other and a driving mechanism (52) used to drive the two clamping plates (51) to clamp the rotating shaft (43).

2. A lightweight plastic safety fence according to claim 1, characterized in that: The mounting seat (44) is slidably connected to the mounting platform (2); The driving mechanism (52) comprises a frame (522) and a second elastic member (521); the two clamping plates (51) are both slidably connected to the frame (522); a limited space (53) is arranged between the two clamping plates (51); a second elastic member (521) is arranged between the frame (522) and one side of the two clamping plates (51) facing away from each other; one end of the second elastic member (521) acts on the frame (522) and the other end acts on the corresponding clamping plate (51); the rotating shaft (43) can slide to the limited space (53) and be clamped by the two clamping plates (51).

3. A lightweight plastic safety fence according to claim 2, characterized in that: The rotating shaft (43) comprises a cylindrical portion (431) and a prism portion (432), the cylindrical portion (431) and the prism portion (432) are connected to each other and rotate synchronously, and the warning tape (41) is wound around the cylindrical portion (431); The end faces of each clamping plate (51) close to each other are fixedly connected to a limiting block (511), and each limiting block (511) is provided with an inclined surface (512). The prism portion (432) can slide into the limiting space (53) through the inclined surface (512) and be clamped by the two clamping plates (51).

4. A lightweight plastic safety fence according to claim 3, characterized in that: The end surfaces of the two clamping plates (51) that are close to each other are both provided with angular grooves (54), and the two angular grooves (54) are arranged corresponding to each other and are adapted to the size of the angular edges of the prism portion (432).

5. A lightweight plastic safety fence according to claim 3 or 4, characterized in that: It also includes a first elastic member (22), one end of the first elastic member (22) acts on the mounting platform (2), and the other end acts on the mounting seat (44), the fixing device (5) also includes a guide plate (55), the guide plate (55) is arranged obliquely from top to bottom along the sliding direction of the prism portion (432) and is fixed on the frame (522), and the guide plate (55) is arranged between the two clamping plates (51); The prism portion (432) comprises an insertion section (4321) and a limiting section (4322), the insertion section (4321) and the limiting section (4322) are both prism-shaped, a telescopic groove (4311) is provided on the cylindrical portion (431), the telescopic groove (4311) is adapted to the insertion section (4321), and the insertion section (4321) is slidably arranged in the telescopic groove (4311); A third elastic member (4312) is provided between the inner wall of the telescopic groove (4311) and the insertion section (4321); one end of the third elastic member (4312) acts on the insertion section (4321), and the other end of the third elastic member (4312) acts on the inner wall of the telescopic groove (4311); the limiting section (4322) can drive the insertion section (4321) to slide into the telescopic groove (4311) under the guiding action of the guide plate (55).

6. A lightweight plastic safety fence according to claim 5, characterized in that: The fixing device (5) further comprises a first baffle (56), wherein the first baffle (56) is fixedly connected to the end surface of the guide plate (55) close to the mounting platform (2) and is used to limit the sliding of the limiting section (4322).

7. A lightweight plastic safety fence according to claim 1, characterized in that: It also includes a second baffle (57), the second baffle (57) being fixedly connected to the mounting platform (2), the second baffle (57) being provided with a slot (571) for the warning tape (41) to pass through, the slot (571) being smaller than the outer diameter of the sleeve (42).

8. A lightweight plastic safety fence according to claim 1, characterized in that: It also comprises a first support (6), wherein two first supports (6) are provided, and the two first supports (6) are respectively provided on both sides of the fence frame (1) and are inclined toward the length direction of the warning tape (41).

9. A lightweight plastic safety fence according to claim 8, characterized in that: It also comprises a second support (7), wherein at least two second supports (7) are provided and are located between the two first supports (6), and the arrangement direction of the two second supports (7) is perpendicular to the arrangement direction of the two first supports (6).

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