Automatic warning fence

Abstract

An automatic warning fence comprises a supporting rod used for external connection and fixed installation, a foldable fence is arranged on the side face of the supporting rod, the fixed end of the fence is connected to the supporting rod, a corresponding connecting rod is arranged at the free end of the other opposite side of the fence, the fence is driven by the connecting rod to stretch out and draw back, and a traction rope is wound on the supporting rod. The free end of the traction rope sequentially penetrates through the fence and the connecting rod to provide guiding and traction effects for movement of the connecting rod, and a motor integration box corresponding to the traction rope is arranged on the connecting rod and provides moving force for the connecting rod. The device is time-saving and labor-saving, not easy to span, and better in warning and isolation effects.

Description

Technical Field

[0001] The utility model belongs to the technical field of fences, and particularly relates to a warning fence that can be automatically unfolded and folded. Background Art

[0002] A warning fence is a device used to mark or isolate special and important areas, playing a warning role and restricting the passage of ordinary people. Warning fences are generally used in major events or important activity sites, etc., and usually need to be set up temporarily according to the on-site situation. Most of the existing warning fences are equipped with a column on the base, and a warning tape is tied to the top of the column. The warning tape is used as the main body of the warning fence to play a warning role externally. However, the warning effect of the warning tape is relatively low, especially not suitable for relatively noisy or temporary warning environments with many uncontrollable factors, and it is easy to be penetrated and damaged. Moreover, when it is unfolded and folded, manual operation is mostly required, which is time-consuming and laborious. Content of the Utility Model

[0003] The purpose of the utility model is to provide a warning fence with a better warning effect and capable of automatically stretching and folding, so as to solve the technical problems of the relatively low warning effect of the existing warning fence and the time-consuming and laborious manual operation during unfolding and folding.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] An automatic warning fence includes a support rod for external fixed installation. A foldable fence is provided on the side of the support rod. The fixed end of the fence is connected to the support rod, and a corresponding connecting rod is provided at the free end on the opposite side. The fence expands and contracts under the drive of the connecting rod. A traction rope is wound around the support rod, and the free end of the traction rope sequentially passes through the fence and the connecting rod to provide guidance and traction for the movement of the connecting rod. A motor integration box corresponding to the traction rope is provided on the connecting rod to provide moving force for the connecting rod.

[0006] Further, the support rod includes a tubular fixed rod with a hollow interior. A corresponding rod cap is provided at its upper end. A sliding device and a spool are fixedly installed in its inner cavity. A through groove corresponding to the sliding device and a wire outlet hole corresponding to the spool are provided on the side wall of the fixed rod. The sliding device passes through the through groove and is correspondingly connected to the fence. The tail end of the traction rope is wound around the spool, and its free end passes through the wire outlet hole and is externally connected. The spool is equipped with a torsion spring and can automatically retract the traction rope. A connecting ring corresponding to the traction rope is provided on the outer side wall of the fixed rod. A corresponding ground pile is provided at the lower end of the fixed rod. The support rod is externally fixed and installed through the ground pile, and the two are detachably and fixedly connected.

[0007] Furthermore, the fence includes multiple sets of folding components that are connected in series and hinged together in sequence. Each folding component includes a pair of folding rods that cross and correspond to each other. The two folding rods are hinged together at the intersection point by a central axis, forming a scissor-shaped folding component. The ends of the two pairs of folding rods of adjacent folding components correspond to each other and are hinged together by end shafts. One end of the fence is rotatably connected to the sliding device of the support rod, and this end is its fixed end. The other end corresponding to it is slidably connected to the connecting rod, and this end is its free end.

[0008] Furthermore, the ends of the two folding rods of the fixed-end folding component near the support rod are shorter than their opposite ends, and the ends of the two folding rods of the free-end folding component near the connecting rod are shorter than their opposite ends. Warning signs corresponding to each other are provided on the front and back surfaces of the folding rods on the fence.

[0009] Furthermore, two connection heads are provided at each end of the fence. A pair of sliding devices corresponding to the connection heads are provided in the inner cavity of the fixed rod. The two sliding devices are respectively located in the upper and lower parts of the inner cavity of the fixed rod. The sliding device includes a sliding rod, which is fixed in the inner cavity of the fixed rod by fixing blocks at its upper and lower ends. A sleeve that can slide up and down is provided on the outer circle of the sliding rod. A slider is fixedly connected to the outer side wall of the sleeve. The outer end of the slider passes through the through groove and is hinged to the connection head of the fence.

[0010] Furthermore, the towing rope includes a rope body and a hook. The rope body is wound around the corresponding spool. The hook 52 is connected to the free end of the rope body. A wire passing hole corresponding to the towing rope is provided on the fence. An end hole corresponding to the towing rope is provided on the connecting rod. The aperture of the end hole is smaller than the size of the tail end of the hook. The free end of the rope body passes through the wire outlet hole, the wire passing hole, and the end hole in sequence and is connected to the hook. The towing rope is externally connected through the hook.

[0011] Furthermore, two towing ropes are provided on the warning fence, namely a guide rope provided in the middle of the fence and an auxiliary rope provided at the upper end of the fence. A pair of corresponding spools are provided in the inner cavity of the fixed rod. A pair of corresponding wire outlet holes are provided on its side wall. A pair of corresponding connection rings are provided on its outer side wall. The wire passing hole includes a first wire passing hole corresponding to the guide rope provided on the central axis and a second wire passing hole corresponding to the auxiliary rope provided on the end shaft. The end hole includes a first end hole corresponding to the guide rope provided in the middle of the connecting rod and a second end hole corresponding to the auxiliary rope provided at the top of the connecting rod. The free end of the guide rope passes through multiple first wire passing holes and the first end hole arranged in sequence on the fence and is connected to the corresponding hook. The free end of the auxiliary rope passes through multiple second wire passing holes and the second end hole arranged in sequence on the fence and is connected to the corresponding hook.

[0012] Further, the motor integration box includes a housing, rollers, and a driving motor. The motor integration box corresponds to the guide rail rope and is fixedly installed on the connecting rod through the front side wall of the housing. A pair of rollers corresponding up and down are provided on the front side of the housing. The guide rail rope passes through the middle of the two rollers. The two rollers include a driving wheel and a driven wheel. A driving motor corresponding to the driving wheel is provided inside the housing.

[0013] Further, a battery associated with the driving motor is provided inside the housing of the motor integration box, and a double-control switch associated with the battery is provided on the warning fence, including a first switch provided on the upper part of the connecting rod and a second switch provided on the cap of the support rod.

[0014] Further, a pair of chutes corresponding to the two connecting heads at the free end of the fence are provided on the connecting rod. The two connecting heads at the free end of the fence 2 pass through the corresponding chutes and corresponding fixed stoppers are provided at their ends.

[0015] The automatic warning fence of the present utility model uses a mechanical device to automatically expand and contract its foldable fence, which is more time-saving and labor-saving. The fence is used instead of the warning tape, and its isolation and warning effects are better, it is more difficult to be penetrated, and the fence is stronger than the warning tape and is not easily damaged. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 of the present utility model Figure 1 is a partial enlarged view at A;

[0018] Figure 3 of the present utility model Figure 1 is a partial enlarged view at B;

[0019] Figure 4 of the present utility model Figure 1 is a partial enlarged cross-sectional view at C;

[0020] Figure 5 of the present utility model Figure 1 is a partial enlarged view at D;

[0021] Figure 6 of the present utility model Figure 1 is a partial enlarged view at E;

[0022] Figure 7 of the present utility model Figure 1 is a partial enlarged view at F;

[0023] Description of the reference numerals in the figure: 1. Support rod; 11. Fixed rod; 12. Ground stake; 13. Rod cap; 14. Sliding device; 141. Slide bar; 142. Slide block; 143. Sleeve; 15. Spool; 16. Through groove; 17. Wire outlet hole; 18. Connecting ring; 2. Fence; 21. Folding assembly; 22. Central axis; 23. End axis; 24. Wire passing hole; 25. Warning sign; 3. Connecting rod; 31. Slide groove; 32. End hole; 4. Motor integration box; 41. Housing; 42. Roller; 43. Driving motor; 44. Battery; 45. Switch; 5. Traction rope; 51. Rope body; 52. Hook. Detailed implementation

[0024] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail an automatic warning fence of the present utility model with reference to the accompanying drawings.

[0025] As Figure 1-7 shown, the automatic warning fence of the present utility model includes a support rod 1, a fence 2 and a connecting rod 3. The warning fence can be externally fixed and installed on the corresponding ground through the support rod 1. The connecting rod 3 is a movable rod that can move left and right. A foldable fence 2 is provided between the support rod 1 and the connecting rod 3. One end of the fence 2 connected to the support rod 1 is its fixed end, and correspondingly, the end connected to the connecting rod 3 is its free end. The left and right movement of the connecting rod 3 can drive the left and right movement of the free end of the fence 2, thereby causing the fence 2 to contract or expand. A corresponding traction rope 5 is provided on the support rod 1. The traction rope 5 is wound around the support rod 1, and its free end sequentially passes through the fence 2 and the connecting rod 3, providing guiding and traction functions for the left and right movement of the connecting rod 3. A motor integration box 4 corresponding to the traction rope 5 is provided on the connecting rod 3. The motor integration box 4 provides the moving force for the connecting rod 3. During installation and use, the fixed part of the support rod 1 is the starting end of the installation of the warning fence, and the point where the free end of the traction rope 5 is connected is used as the ending end of the warning fence. When the warning fences are connected to each other, the warning fence is connected to the support rod 1 of the adjacent warning fence through the free end of its traction rope 5. The fence 2 is in a contracted state when not installed. The motor integration box 4 can use the traction rope 5 as a runway, and it drives the connecting rod 3 to move left and right on the traction rope 5, so that the fence 2 gradually expands or contracts accordingly. In this way, the disassembly and assembly of the fence 2 on the warning fence become automated, which is more time-saving and labor-saving.

[0026] The support rod 1 includes a fixed rod 11 and a ground pile 12. The fixed rod 11 is a hollow tubular shape. A corresponding rod cap 13 is provided at the upper end of the fixed rod 11. A sliding device 14 and a spool 15 are provided inside the fixed rod 11, and both are fixedly installed in the inner cavity of the fixed rod 11. A through slot 16 corresponding to the sliding device 14 and a wire outlet hole 17 corresponding to the spool 15 are provided on the side wall of the fixed rod 11. The side end of the sliding device 14 passes through the through slot 16 and is correspondingly connected to the fixed end of the fence 2. The tail end of the towing rope 5 is wound around the spool 15, and its free end passes through the wire outlet hole 17 and is externally connected. In this embodiment, a spool 15 with a torsion spring is used. When the warning fence is removed, after the free end of the towing rope 5 is relaxed, the spool 15 with a torsion spring can automatically retract the towing rope 5. The ground pile 12 is provided at the lower end of the fixed rod 11, and the two correspond to each other. The support rod 1 is fixedly installed externally through the ground pile 12. The fixed rod 11 and the ground pile 12 are detachably fixedly connected. In this embodiment, the two are connected to each other through corresponding clamps. A corresponding pointed tip is provided at the lower end of the ground pile 12. During installation, the lower part of the ground pile 12 is drilled into the ground through a corresponding external electric drill to fix it, and then the bottom end of the fixed rod 11 is sleeved on the upper end of the ground pile 12 and fixed through a clamp, and the two are fixedly installed together in combination.

[0027] The fence 2 includes folding components 21. Multiple groups of folding components 21 are sequentially connected in series to assemble the fence 2. The adjacent folding components 21 are hinged to each other. The number of folding components 21 can be flexibly selected according to needs. The folding component 21 in this embodiment includes a pair of corresponding folding rods. The two folding rods cross each other and are hinged together at the intersection point through a central axis 22 to form a scissor-shaped folding component 21. The scissor-shaped folding component 21 is vertically mirror-symmetrical along its horizontal center line. The ends of the two pairs of folding rods of the adjacent folding components 21 correspond one by one and are hinged together through an end shaft 23. Multiple scissor-shaped folding components 21 are sequentially hinged in series to form a foldable fence 2. The fence 2 is vertically mirror-symmetrical along its horizontal center line and horizontally mirror-symmetrical along its vertical center line. The radial dimension of the folding component 21 can be changed by the rotation between the two folding rods. The expansion or contraction of the fence 2 is completed by the change of the radial dimensions of multiple groups of folding components 21 connected in series. One end of the fence 2 is connected to the sliding device 14 of the support rod 1, and the two are rotatably connected. This end is its fixed end. Its corresponding other end is connected to the connecting rod 3. A corresponding sliding groove 31 is provided on the connecting rod 3, and the two are slidably connected. This end is its free end. In this embodiment, the ends of the two folding rods of the folding component 21 at the fixed end of the fence 2 near the support rod 1 are shorter than their opposite ends. The ends of the two folding rods of the folding component 21 at the free end of the fence 2 near the connecting rod 3 are shorter than their opposite ends. The two pairs of folding rods of the folding components 21 at both ends of the fence 2 all use the principle of a lever, so that when there is a small displacement in the vertical direction, the fence 2 can complete a large-distance expansion and contraction.

[0028] The sliding device 14 includes a sliding rod 141, a slider 142 and a sleeve 143. The sliding rod 141 is arranged in the inner cavity of the fixed rod 11, and corresponding fixing blocks are provided at its upper and lower ends. The outer ring of the fixing block is fixedly connected to the inner wall of the fixed rod 11, so that the slider 142 is fixed in the inner cavity of the fixed rod 11, and its axis is parallel to the axis of the fixed rod 11. A corresponding sleeve 143 is provided on the outer ring of the sliding rod 141. The sleeve 143 is sleeved on the sliding rod 141, and the two are slidably connected. The sleeve 143 can move up and down on the outer ring of the sliding rod 141. The inner end of the slider 142 is connected to the outer side wall of the sleeve 143, and the two are fixedly connected. Its corresponding outer end passes through the through groove 16 out of the inner cavity of the fixed rod 11 and is connected to the fence 2. In this embodiment, the fence 2 is formed by connecting a plurality of scissor-type folding components 21 in series. Therefore, two connection heads are provided at each end of the fence 2. A pair of corresponding sliding devices 14 are provided in the inner cavity of the fixed rod 11. The two sliding devices 14 are respectively located in the upper and lower parts of the inner cavity of the fixed rod 11. A pair of through grooves 16 corresponding to the sliding devices 14 are provided on the side wall of the fixed rod 11. The two through grooves 16 are both vertically arranged and correspond up and down. The two sliding devices 14 correspond up and down in the inner cavity of the fixed rod 11, and the sliders 142 of the two sliding devices 14 correspond one by one to the two connection heads at the fixed end of the fence 2 and are hinged together.

[0029] The towing rope 5 includes a rope body 51 and a hook 52. The rope body 51 is wound around the corresponding spool 15 in the inner cavity of the fixed rod 11. The free end of the rope body 51 passes through the wire outlet hole 17 on the side wall of the fixed rod 11, the fence 2 and the connecting rod 3 in sequence and is connected to the hook 52. The towing rope 5 is externally connected through the hook 52. In this embodiment, two towing ropes 5 are provided, namely a guide rail rope provided in the middle of the fence 2 and an auxiliary rope provided at the upper end of the fence 2. A pair of spools 15 corresponding to the guide rail rope and the auxiliary rope are provided on the fixed rod 11, and both are located at the corresponding positions in the inner cavity of the fixed rod 11. A pair of wire outlet holes 17 corresponding to the two towing ropes 5 are provided on the side wall of the fixed rod 11. The fence 2 is provided with wire passing holes 24 corresponding to the towing rope 5, including a first wire passing hole corresponding to the guide rail rope provided on the central shaft 22 and a second wire passing hole corresponding to the auxiliary rope provided on the end shaft 23. The connecting rod 3 is provided with end holes 32 corresponding to the two towing ropes 5. The aperture of the end hole 32 is smaller than the tail end size of the hook 52. The hook 52 can be clamped through the end hole 32 to prevent the free end of the towing rope 5 from retracting into the inner cavity of the fixed rod 11, thereby causing inconvenience in use. The end hole 32 includes a first end hole in the middle of the connecting rod 3 and a second end hole at the top of the connecting rod 3. The first end hole corresponds to the guide rail rope. The free end of the guide rail rope passes through a plurality of first wire passing holes arranged in sequence on the fence 2, and then passes through the first end hole and is connected to the corresponding hook 52. The second end hole corresponds to the auxiliary rope. The free end of the auxiliary rope passes through a plurality of second wire passing holes arranged in sequence on the fence 2, and then passes through the second end hole and is connected to the corresponding hook 52.

[0030] Further, a connection ring 18 corresponding to the traction rope 5 is provided on the outer side wall of the fixed rod 11. The connection ring 18 is used for corresponding connection between adjacent warning fences. In this embodiment, a pair of corresponding connection rings 18 are provided on the outer side wall of the fixed rod 11 on the other side corresponding to the wire outlet hole 17. The two connection rings 18 are respectively located in the middle and upper part of the fixed rod 11. Among them, the connection ring 18 in the middle of the fixed rod 11 is correspondingly connected to the hook 52 on the guide rail rope of the adjacent warning fence, and the connection ring 18 in the upper part of the fixed rod 11 is correspondingly connected to the hook 52 on the auxiliary rope of the adjacent warning fence.

[0031] Further, a sliding groove 31 corresponding to the fence 2 is provided on the connecting rod 3. In this embodiment, two connection heads are provided at both ends of the fence 2, and a pair of corresponding sliding grooves 31 are provided on the connecting rod 3. The two sliding grooves 31 are respectively located on the upper and lower sides of the connecting rod 3, and both are vertically arranged and correspond to each other. Blocks are provided at the two connection heads at the free end of the fence 2. The two connection heads at the free end of the fence 2 respectively pass through the upper and lower sliding grooves 31 on the connecting rod 3 and are fixedly connected to the corresponding blocks. The blocks can prevent the free end of the fence 2 from disengaging from the connecting rod 3.

[0032] The motor integration box 4 is fixedly installed on the connecting rod 3. It corresponds to the guide rail rope of the traction rope 5 and is located in the middle of the connecting rod 3. It includes a housing 41, rollers 42 and a driving motor 43. Among them, the connecting rod 3 is provided on the front side wall of the housing 41, close to one side of its left side wall. A pair of upper and lower corresponding rollers 42 are provided in the middle of the front side of the housing 41. The guide rail rope passes through the middle of the two rollers 42. The two rollers 42 include a driving wheel and a driven wheel. In this embodiment, the upper roller 42 of the two rollers 42 is the driving wheel, and the lower roller 42 is the driven wheel. A driving motor 43 corresponding to the driving wheel is provided in the housing 41, which provides power for the rotation of the driving wheel. By the rotation of the motor, the driving wheel is driven to rotate, and then under the cooperation of the driven wheel, it moves left and right along the guide rail rope, and then drives the fence 2 to expand or contract through the connecting rod 3.

[0033] Further, a corresponding battery 44 is provided in the housing 41 of the motor integration box 4. The battery 44 is associated with the driving motor 43. The battery 44 can provide electrical energy for the rotation of the driving motor 43. A switch 45 associated with the battery 44 is provided on the warning fence, and its operation can be controlled through the switch 45.

[0034] Further, the switch 45 is a double-control switch, which includes a first switch provided on the upper part of the connecting rod 3 and a second switch provided on the rod cap 13 of the support rod 1. The first switch and the second switch are parallel control switches, and the forward, stop and reverse of the motor integration box 4 can be controlled through both of them, and then the expansion, holding and contraction of the fence 2 can be controlled.

[0035] Furthermore, corresponding warning signs 25 are provided on the front and rear surfaces of the folding rod on the fence 2. Corresponding warning signs 25 are provided on the front and rear surfaces of the folding rod. The warning signs 25 are made of fluorescent material and can also play a good warning role at night.

[0036] When installing and using, first fix the ground pile 12 at the corresponding position, then install the fixing rod 11 on the ground pile 12, then pull out the free end of the traction rope 5 and fix it on the next device. In this embodiment, the mutual connection between the warning fences is taken as an example. After the traction rope 5 is pulled out, its hook 52 is connected to the corresponding connecting ring 18 of the adjacent warning fence. Click the switch 45 to put it in the forward gear position, and the drive motor 43 is started, which drives the roller 42 to rotate forward, and the connecting rod 3 moves along the guide rope to the next device at the far end of the support rod 1, and the fence 2 is unfolded with it. When the connecting rod 3 moves to When the next device is installed, the switch 45 is turned off and it stops moving. The installation of the warning fence is completed. When it needs to be recovered after use, the switch 45 is clicked to put it in the reverse gear position, and the drive motor 43 is started, which drives the roller 42 to rotate in the opposite direction. The connecting rod 3 moves along the guide rope toward the support rod 1. After the fence 2 is fully retracted, the switch 45 is turned off, the connecting rod 3 stops moving, the free end of the traction rope 5 is disassembled, and the spool 15 automatically retracts it into the fixed rod 11, the fixed rod 11 is removed from the ground pile 12, and finally the ground pile 12 is removed from the corresponding position. The removal of the warning fence is completed.

[0037] The automatic warning fence of the utility model uses a foldable fence 2, and its extension and retraction can be automatically completed by a corresponding mechanical device. This part does not need manual operation, making the installation and disassembly of the warning fence more time-saving and labor-saving. The setting of the fence 2 is not easy to be penetrated and damaged, and is more solid. Corresponding warning signs 25 are provided on both sides of the folding rod, and the warning and isolation effects are better.

[0038] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An automatic warning fence, characterized in that: The invention comprises a support rod (1) for external fixed installation, a foldable fence (2) is arranged on the side of the support rod (1), a fixed end of the fence (2) is connected to the support rod (1), and a corresponding connecting rod (3) is arranged on the free end on the other side of the fence (2), the fence (2) is extended and retracted under the drive of the connecting rod (3), a traction rope (5) is wound around the support rod (1), the free end of the traction rope (5) passes through the fence (2) and the connecting rod (3) in turn, and provides guidance and traction for the movement of the connecting rod (3), and a motor integrated box (4) corresponding to the traction rope (5) is arranged on the connecting rod (3), which provides moving force for the connecting rod (3).

2. The automatic warning fence according to claim 1, characterized in that: The support rod (1) comprises a tubular fixed rod (11) with a hollow interior, a corresponding rod cap (13) being provided at the upper end thereof, a sliding device (14) and a spool (15) being fixedly installed in the inner cavity thereof, a through slot (16) corresponding to the sliding device (14) and a wire outlet hole (17) corresponding to the spool (15) being provided on the side wall of the fixed rod (11), the sliding device (14) passing through the through slot (16) being connected to the fence (2) in correspondence, the tail end of the traction rope (5) being wound around the spool (15), the free end of the traction rope passing through the wire outlet hole (17) being connected to the outside, the spool (15) being provided with a torsion spring, and being able to automatically recycle the traction rope (5), a connecting ring (18) corresponding to the traction rope (5) being provided on the outer side wall of the fixed rod (11), a corresponding ground pile (12) being provided at the lower end of the fixed rod (11), the support rod (1) being fixedly installed to the outside through the ground pile (12), and the two being detachably fixedly connected.

3. The automatic warning fence according to claim 2, characterized in that: The fence (2) includes a plurality of folding components (21) which are connected in series and hinged together in sequence. The folding components (21) include a pair of folding rods which cross and correspond to each other. The two folding rods are hinged together at the intersection through a central axis (22) to form a scissor-shaped folding component (21). The ends of the two pairs of folding rods of adjacent folding components (21) correspond to each other and are hinged together through an end axis (23). One end of the fence (2) can be rotatably connected to the sliding device (14) of the support rod (1), and this end is its fixed end. The corresponding other end can be slidably connected to the connecting rod (3), and this end is its free end.

4. The automatic warning fence according to claim 3, characterized in that: The ends of the two folding rods of the fixed-end folding assembly (21) near the support rod (1) are shorter than the other ends thereof, and the ends of the two folding rods of the free-end folding assembly (21) near the connecting rod (3) are shorter than the other ends thereof, and corresponding warning marks (25) are provided on the front and rear surfaces of the folding rods on the fence (2).

5. The automatic warning fence according to claim 3, characterized in that: Two connecting heads are respectively arranged at the two ends of the fence (2); a pair of sliding devices (14) corresponding to the connecting heads are arranged in the inner cavity of the fixed rod (11); the two sliding devices (14) are respectively located at the upper and lower parts of the inner cavity of the fixed rod (11); the sliding device (14) comprises a sliding rod (141), which is fixed in the inner cavity of the fixed rod (11) by fixing blocks at the upper and lower ends; the outer ring of the sliding rod (141) is provided with a sleeve (143) which can slide up and down; the outer wall of the sleeve (143) is provided with a fixedly connected sliding block (142); the outer end of the sliding block (142) passes through the through groove (16) and is hingedly connected to the connecting head of the fence (2).

6. The automatic warning fence according to claim 3, characterized in that: The traction rope (5) comprises a rope body (51) and a hook (52), wherein the rope body (51) is wound on a corresponding spool (15), the hook (52) is connected to the free end of the rope body (51), a wire hole (24) corresponding to the traction rope (5) is provided on the fence (2), an end hole (32) corresponding to the traction rope (5) is provided on the connecting rod (3), the hole diameter of the end hole (32) is smaller than the tail end size of the hook (52), the free end of the rope body (51) passes through the wire outlet hole (17), the wire hole (24) and the end hole (32) in sequence, and is connected to the hook (52), and the traction rope (5) is connected to the outside through the hook (52).

7. The automatic warning fence according to claim 6, characterized in that: The warning fence is provided with two traction ropes (5), which are a guide rope arranged in the middle of the fence (2) and an auxiliary rope arranged at the upper end of the fence (2). A corresponding pair of spools (15) are arranged in the inner cavity of the fixed rod (11), a corresponding pair of wire outlet holes (17) are arranged on its side wall, and a corresponding pair of connecting rings (18) are arranged on its outer side wall. The wire holes (24) include a first wire hole arranged on the central axis (22) corresponding to the guide rope and a second wire hole arranged on the end axis (23) corresponding to the auxiliary rope. The end hole (32) includes a first end hole arranged in the middle of the connecting rod (3) corresponding to the guide rope and a second end hole arranged at the top of the connecting rod (3) corresponding to the auxiliary rope. The free end of the guide rope passes through a plurality of first wire holes and a first end hole arranged in sequence on the fence (2) and is connected to a corresponding hook (52). The free end of the auxiliary rope passes through a plurality of second wire holes and a second end hole arranged in sequence on the fence (2) and is connected to a corresponding hook (52).

8. The automatic warning fence according to claim 7, characterized in that: The motor integrated box (4) comprises a housing (41), rollers (42) and a driving motor (43). The motor integrated box (4) corresponds to the guide rail rope and is fixedly mounted on the connecting rod (3) through the front side wall of the housing (41). A pair of rollers (42) corresponding to each other are arranged on the front side of the housing (41). The guide rail rope passes through the middle of the two rollers (42). The two rollers (42) comprise a driving wheel and a driven wheel. A driving motor (43) corresponding to the driving wheel is arranged in the housing (41).

9. The automatic warning fence according to claim 8, characterized in that: A battery (44) associated with the drive motor (43) is arranged in the housing (41) of the motor integrated box (4), and a double-control switch (45) associated with the battery (44) is arranged on the warning fence, comprising a first switch (45) arranged on the upper part of the connecting rod (3) and a second switch (45) arranged on the rod cap (13) of the supporting rod (1).

10. The automatic warning fence according to claim 3, characterized in that: The connecting rod (3) is provided with a pair of slide grooves (31) corresponding to the two connecting heads at the free ends of the fence (2); after the two connecting heads at the free ends of the fence (2) pass through the corresponding slide grooves (31), corresponding fixed blocks are provided at their ends.

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