A non-destructive construction road occupancy warning telescopic fence

Abstract

This invention relates to the field of construction equipment technology, specifically a non-destructive retractable warning fence for road occupancy. It includes a support body and a warning tape retraction mechanism connected to the support body. The warning tape retraction mechanism is fixedly installed on the top of the support body. The support body includes an outer support cylinder and three movably installed support legs inside the outer support cylinder. By placing the retractable support legs inside the outer support cylinder, in the initial state, the three support legs are completely retracted into the outer support cylinder, minimizing the overall volume of the support body and facilitating personnel transportation and storage. In actual use, a lifting pusher pushes the support legs to extend from inside the outer support cylinder along the sliding grooves opened in the guide seats. Guided by the inclined guide grooves, the support legs simultaneously open away from the center of the outer support cylinder. The three opened support legs form a triangular stable support structure. The operation is simple and quick, significantly shortening the fence's construction time.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology, specifically to a non-destructive construction road occupancy warning telescopic fence. Background Technology

[0002] In non-demolition road occupation construction scenarios such as municipal maintenance, road upkeep, and pipeline laying, road occupation warning retractable fences have become an indispensable temporary protective facility to ensure the safety of the construction area, guide pedestrians and vehicles to pass in an orderly manner, and avoid accidental collisions. However, existing fences have significant drawbacks. To ensure stability, their bases are mostly one-piece fixed structures, which are bulky and cannot be folded, making installation, carrying, and storage inconvenient. Furthermore, the folding range of the fence body is limited; even when folded, the overall size remains large, failing to meet practical needs. In addition, the bases and main structures of existing fences are mostly fixedly connected and cannot be disassembled, further limiting their storage flexibility. Even some fences using split bases still have bases that cannot be folded, and the disassembly and assembly process is cumbersome, failing to fundamentally solve the problems of excessive size and inconvenience in installation and carrying. With the increasing number of non-destructive road occupancy construction scenarios, the requirements for the convenience and flexibility of fences are rising. The shortcomings of existing technologies, such as the inability to fold the base and the large overall size after folding, are no longer sufficient to meet the transportation, installation, and storage needs of actual construction. There is an urgent need for a non-destructive road occupancy warning telescopic fence that can solve the above pain points. Therefore, we propose a non-destructive road occupancy warning telescopic fence to solve the aforementioned technical problems. Summary of the Invention

[0003] This invention provides the following technical solution: A non-destructive construction road occupancy warning telescopic fence includes a support body and a warning tape retraction mechanism connected to the support body. The warning tape retraction mechanism is fixedly installed on the top of the support body. The support body includes a support outer cylinder and three support legs movably installed inside the support outer cylinder. The three support legs are distributed at equal angles along the axial direction of the support outer cylinder. In the initial state, the three support legs are located inside the support outer cylinder. The warning tape retraction mechanism includes a winding drum fixedly installed on the top of the support outer cylinder. A winding roller is rotatably installed inside the winding drum. A flexible mesh is fixedly installed on the outer wall of the winding roller. In the initial state, the flexible mesh is arranged around the winding roller in a winding manner.

[0004] As a preferred embodiment of the present invention, three guide seats are fixedly installed on the inner wall of the outer support cylinder. The three guide seats are distributed at equal angles along the axial direction of the outer support cylinder, and each of the three guide seats has a guide groove on its opposite surface. The three support legs are respectively located in the three guide grooves. Each of the three guide seats has a vertical sliding groove and an inclined guide groove connected to the bottom of the vertical sliding groove. The vertical sliding groove is vertically oriented, and the inclined guide groove is set at an acute angle to the vertical sliding groove. The inclined guide groove is oriented towards the end away from the center of the outer support cylinder, and the connection between the vertical sliding groove and the inclined guide groove is a smooth arc transition.

[0005] As a preferred embodiment of the present invention, two pins are fixedly installed on each of the two sets of sides of the support leg adjacent to the vertical slide groove. The two pins are distributed along the opening direction of the vertical slide groove, and deep groove ball bearings are fixedly installed on the periphery of each pin. The outer ring of the deep groove ball bearing is in contact with the inner wall of the vertical slide groove.

[0006] As a preferred embodiment of the present invention, a sliding groove is provided at the top of the support leg, and a sliding rod is fixedly installed inside the sliding groove. The sliding rod is parallel to the axial direction of the pin shaft. A lifting push block is movably arranged inside the outer cylinder of the support. The lifting push block has three protrusions extending outward in the direction of its center, and each of the protrusions extends into the sliding groove at the corresponding position. The three protrusions of the lifting push block are all provided with lifting push grooves through their sides, and the inner wall of the lifting push groove is slidably connected to the outer wall of the sliding rod.

[0007] As a preferred embodiment of the present invention, a transmission screw is rotatably installed inside the outer support cylinder. The transmission screw is coaxial with the outer support cylinder and passes through the lifting push block vertically. It is threadedly connected to the lifting push block, which is suitable for the transmission screw to rotate, drive the lifting push block to move up and down, and thereby drive the three support legs to unfold to the bottom of the outer support cylinder or retract into the outer support cylinder.

[0008] As a preferred embodiment of the present invention, anti-slip pads are fixedly installed at the ends of the support legs.

[0009] As a preferred embodiment of the present invention, the outer wall of the take-up roller includes two flexible meshes, and the two flexible meshes are symmetrical about the axial direction of the take-up roller. The outer wall of the take-up drum has two through-holes for accommodating the flexible meshes. The flexible meshes extend to the outside of the take-up drum through the through-holes. The take-up roller is coaxial with the drive screw, and a clutch transmission mechanism is provided between the bottom of the take-up roller and the top of the drive screw to transmit the torque of the take-up roller to the drive screw through the clutch transmission mechanism.

[0010] As a preferred embodiment of the present invention, the clutch transmission mechanism includes a transmission sleeve fixedly installed on the top of the transmission lead screw. The transmission sleeve is a hollow cylindrical structure with an open top, and the inner wall of the transmission sleeve has several annularly distributed torque-limiting grooves. A drive seat is fixedly installed at the bottom of the take-up roller. The drive seat is located inside the hollow structure at the top of the transmission sleeve, and several elastic clips are fixedly installed on the outer wall of the drive seat. The elastic clips themselves are elastic, and the ends of the elastic clips away from the drive seat are provided with clips that are adapted to the specifications of the torque-limiting grooves. The clips are engaged inside the torque-limiting grooves.

[0011] As a preferred embodiment of the present invention, a rocker arm is fixedly installed on the top of the take-up roller, and a handle is fixedly installed on the top end of the rocker arm away from the take-up roller.

[0012] As a preferred embodiment of the present invention, a positioning seat and a positioning block are respectively fixedly installed at the two openings on the take-up roller at the ends that are furthest away from each other. The positioning seat has a positioning groove on the side near the positioning block to accommodate the insertion of the positioning block. The positioning block is inserted into the positioning groove, and the positioning block and the positioning seat are fastened together by bolts.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By placing the retractable support legs inside the outer support cylinder, the three support legs are completely retracted into the outer support cylinder in the initial state, which minimizes the volume of the entire support body, making it easier for personnel to transport and store. In actual use, only the position of the lifting push block needs to be adjusted to push the support legs out from inside the outer support cylinder along the sliding groove opened in the guide seat. Under the guidance of the inclined guide groove, the support legs will open simultaneously in a direction away from the center of the outer support cylinder. The three opened support legs form a triangular stable support structure. The operation is simple and quick, greatly shortening the construction time of the fence.

[0014] 2. By setting up a clutch transmission mechanism, the rotational power of the winding roller can be transmitted to the transmission screw during the extraction of the flexible fence. After the transmission screw rotates, it drives the lifting push block to move down, simultaneously realizing the two actions of unfolding the support legs and extracting the flexible fence. The entire fence can be erected in one step by simply turning the rocker arm, without the need for separate operations, further simplifying the installation process. When storing, simply turn the rocker arm in the opposite direction to simultaneously complete the winding of the flexible fence and the storage of the support legs, making the operation more efficient.

[0015] 3. Each support body can pull out two flexible nets. When in use, simply fix the two support bodies at opposite corners of the road occupation area, pull out the two flexible nets, insert the positioning blocks at the ends of the flexible nets into the positioning slots of the corresponding positioning seats of the other support body, and tighten the bolts to complete the enclosure. It does not require multiple support bodies to be built one by one, which reduces the amount of materials used and makes the construction more flexible and convenient. The placement of the two support bodies can be adjusted according to the actual size of the road occupation construction area, making it more adaptable.

[0016] 4. After the support legs are fully extended, if the flexible fence still needs to be extended, it can be pulled out. During this process, the winding roller continues to drive the drive seat and elastic clips to rotate, while the three support legs are fully extended and cannot continue to move. Therefore, the transmission sleeve and transmission screw are limited and cannot rotate. At this time, the external force on the drive seat will push the elastic clips of the elastic material to deform, causing the clip head to disengage from the slot of the torque limiting slot and slip and rotate inside the transmission sleeve. This will not affect the operation of continuing to pull out the flexible fence to expand the warning area. There is no need to switch the operation state, which can better adapt to the rapid deployment needs of sudden road occupation construction scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a side sectional view of the supporting outer cylinder and the winding cylinder in this invention; Figure 4 In this invention Figure 3 A partially enlarged structural diagram; Figure 5 This is a schematic diagram of the unfolded structure of the supporting leg in this invention; Figure 6 This is a schematic diagram of the folding structure of the supporting leg in this invention; Figure 7 This is a schematic diagram of the lifting push block in this invention; Figure 8 This is a schematic diagram of the clutch transmission mechanism in this invention; Figure 9 In this invention Figure 1 A schematic diagram of a partial structure; Figure 10 In this invention Figure 3 A partially enlarged structural diagram.

[0018] In the diagram: 100, Support body; 101, Support outer cylinder; 102, Support leg; 103, Guide seat; 104, Guide groove; 105, Vertical slide groove; 106, Angled guide groove; 107, Transmission screw; 108, Lifting push block; 1081, Lifting push groove; 109, Sliding groove; 1091, Sliding rod; 1021, Pin; 1022, Deep groove ball bearing; 1023, Anti-slip pad ; 200, Warning tape take-up and take-down mechanism; 201, Take-up drum; 202, Take-up roller; 203, Flexible fence; 204, Through port; 205, Rocker arm; 206, Handle; 207, Positioning seat; 208, Positioning groove; 209, Positioning insert; 300, Clutch transmission mechanism; 301, Transmission sleeve; 302, Torque limiting slot; 303, Drive seat; 304, Elastic clip; 3041, Clip head. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-10 The technical solution provided by the present invention specifically includes the following embodiments: A non-destructive construction road occupancy warning telescopic fence includes a support body 100 and a warning tape retraction mechanism 200 connected to the support body 100. The warning tape retraction mechanism 200 is fixedly installed on the top of the support body 100. The support body 100 includes a support outer cylinder 101 and three support legs 102 movably installed inside the support outer cylinder 101. The three support legs 102 are evenly distributed along the axial direction of the support outer cylinder 101. In the initial state, the three support legs 102 are located inside the support outer cylinder 101. The warning tape retraction mechanism 200 includes a take-up drum 201 fixedly installed on the top of the support outer cylinder 101. A take-up roller 202 is rotatably installed inside the take-up drum 201. A flexible mesh 203 is fixedly installed on the outer wall of the take-up roller 202. In the initial state, the flexible mesh 203 is arranged in a winding manner around the take-up roller 202. The outer wall of the take-up roller 202 includes two flexible meshes 203. 3. The two flexible meshes 203 are axially symmetrical about the take-up roller 202. Two openings 204 are provided through the outer wall of the take-up drum 201 to accommodate the passage of the flexible meshes 203. The flexible meshes 203 extend to the outside of the take-up drum 201 through the openings 204. The take-up roller 202 is coaxial with the drive screw 107. A clutch transmission mechanism 300 is provided between the bottom of the take-up roller 202 and the top of the drive screw 107 to transmit the torque of the take-up roller 202 to the drive screw 107 through the clutch transmission mechanism 300. A positioning seat 207 and a positioning block 209 are fixedly installed at the two openings 204 on the take-up roller 202 at the far end, respectively. A positioning groove 208 is provided on the side of the positioning seat 207 near the positioning block 209 to accommodate the insertion of the positioning block 209. The positioning block 209 is inserted into the positioning groove 208, and the positioning block 209 and the positioning seat 207 are fastened together by bolts.

[0021] Specifically, during installation, two workers respectively grasp the positioning seat 207 and the positioning groove 208, and simultaneously pull the flexible netting 203 away from the winding drum 201. As the flexible netting 203 is pulled out, the flexible netting 203 wrapped around the winding roller 202 continuously extends outward from the winding drum 201, thus forming an effective warning isolation area. Since it only requires a simple pull of the flexible netting 203 to extend, the warning isolation area is formed quickly. After the flexible netting 203 is completely pulled out, the positioning insert 209 of the first fence is engaged. By aligning the positioning slot 208 on the side of an adjacent positioning seat 207 with the fence and inserting it, and then tightening it with bolts, multiple fence units can be quickly assembled. The fence length can be flexibly adjusted according to the actual size of the construction area, adapting to different scales of construction scenarios and ensuring construction safety. When storing, the flexible fence 203 can be rewound back into the winding drum 201 by rotating the winding roller 202 in the opposite direction, which greatly reduces the storage volume of the fence body. Compared with traditional fixed-size fences, it occupies less space and is easier to carry and transport.

[0022] For further details, please refer to [link / reference]. Figure 5 , Figure 6 , Figure 7 As shown: Three guide seats 103 are fixedly installed on the inner wall of the outer support cylinder 101. The three guide seats 103 are distributed at equal angles along the axial direction of the outer support cylinder 101, and each of the three guide seats 103 has a guide groove 104 on its opposite face. The three support legs 102 are respectively located in the three guide grooves 104. Each of the three guide seats 103 has a vertical sliding groove 105 and an inclined guide groove 106 connected to the bottom of the vertical sliding groove 105. The vertical sliding groove 105 is vertically opened, and the inclined guide groove 106 is connected to the vertical sliding groove. The vertical slide 105 is set at an acute angle, and the inclined guide groove 106 is opened at the end away from the center of the supporting outer cylinder 101. The connection between the vertical slide 105 and the inclined guide groove 106 is a smooth arc transition. Two pins 1021 are fixedly installed on the two sets of sides of the supporting leg 102 near the vertical slide 105. The two pins 1021 are distributed along the opening direction of the vertical slide 105, and deep groove ball bearings 1022 are fixedly installed on the periphery of each pin 1021. The outer ring of the deep groove ball bearing 1022 is connected to the vertical slide 105. 05. The inner wall contacts the support leg 102, which has a sliding groove 109 at its top. A sliding rod 1091 is fixedly installed inside the sliding groove 109. The sliding rod 1091 is axially parallel to the pin 1021. A lifting push block 108 is movably arranged inside the outer support cylinder 101. The lifting push block 108 has three protrusions extending outward from its center, and each protrusion extends into the sliding groove 109 at a corresponding position. The three protrusions of the lifting push block 108 all have lifting push grooves 108 extending through them on their sides. 1. The inner wall of the lifting push groove 1081 is slidably connected to the outer wall of the sliding rod 1091. A transmission screw 107 is rotatably installed inside the supporting outer cylinder 101. The transmission screw 107 is coaxial with the supporting outer cylinder 101. The transmission screw 107 passes through the lifting push block 108 from top to bottom and is threadedly connected to the lifting push block 108. This allows the transmission screw 107 to rotate, driving the lifting push block 108 to move up and down, thereby driving the three supporting legs 102 to unfold towards the bottom of the supporting outer cylinder 101 or to retract into the supporting outer cylinder 101.

[0023] Specifically, when the take-up roller 202 rotates, it transmits torque to the transmission screw 107 inside the supporting outer cylinder 101 through the clutch transmission mechanism 300 connected at the bottom, causing the transmission screw 107 to rotate along with the take-up roller 202. Since the transmission screw 107 and the lifting push block 108 movably sleeved on its outer side are connected by a threaded engagement, when the transmission screw 107 rotates, the lifting push block 108, which was originally in a high position, will slowly move downward along the axial direction of the supporting outer cylinder 101. During the downward movement of the lifting push block 108, it will push the three sliding rods 1091 and the three supporting legs 102 to move downward synchronously through the three lifting push grooves 1081 that are provided through it. When the supporting legs 102 move downward from the initial position... After the state moves downward along the vertical slide 105 to the arc transition position between the vertical slide 105 and the inclined guide 106, the supporting legs 102 continue to move downward along the inclined guide 106 in a direction away from the center of the supporting outer cylinder 101. The three supporting legs 102 gradually open outward from the inside of the supporting outer cylinder 101. Finally, the ends of the three supporting legs 102 extend outward from the bottom of the supporting outer cylinder 101 at the same time, forming a stable triangular support structure on the ground. There is no need to break and drill holes in the construction ground. The base can be unfolded and fixed by simply placing the supporting legs on the ground. The whole process does not require additional assembly parts. The base can be unfolded simultaneously by pulling out the flexible netting 203. The operation is simple and efficient.

[0024] It should be noted that anti-slip pads 1023 are fixedly installed at the ends of the support legs 102. The anti-slip pads 1023 are made of wear-resistant rubber material, which can increase the friction between the ends of the support legs 102 and the ground, and prevent the support body 100 from slipping and shifting after unfolding. Even on smooth asphalt roads or wet paving roads, the stability of the overall structure can be maintained, reducing the risk of accidental tipping.

[0025] For further details, please refer to [link / reference]. Figure 8 As shown: The clutch transmission mechanism 300 includes a transmission sleeve 301 fixedly installed on the top of the transmission lead screw 107. The transmission sleeve 301 is a hollow cylindrical structure with an open top, and several annularly distributed torque limiting grooves 302 are opened on the inner wall of the transmission sleeve 301. A drive seat 303 is fixedly installed at the bottom of the take-up roller 202. The drive seat 303 is located in the hollow structure at the top of the transmission sleeve 301, and several elastic clips 304 are fixedly installed on the outer wall of the drive seat 303. The elastic clips 304 are elastic. The ends of the elastic clips 304 away from the drive seat 303 are provided with clip heads 3041 that are adapted to the specifications of the torque limiting grooves 302. The clip heads 3041 are engaged inside the torque limiting grooves 302.

[0026] Specifically, when the user pulls out the flexible netting 203, the flexible netting 203 will drive the take-up roller 202 and its bottom drive seat 303 to rotate synchronously. When the drive seat 303 rotates, due to the engagement between the clamping head 3041 and the torque-limiting groove 302, the rotation of the drive seat 303 drives the transmission sleeve 301 to rotate together through the clamping head 3041, transmitting torque to the lifting push block 108, ultimately causing the lifting push block 108 to rotate synchronously, driving the three support legs 102 to unfold. After the three support legs 102 are fully unfolded, if the flexible netting 203 still needs to be extended, it can be pulled out again. In the middle, the take-up roller 202 continues to drive the drive seat 303 and the elastic clip 304 to rotate, while the three support legs 102 have been fully extended and cannot continue to move. Therefore, the transmission sleeve 301 and the transmission screw 107 are limited and cannot rotate. At this time, the external force on the drive seat 303 will push the elastic clip 304 of elastic material to deform, causing the clip head 3041 to disengage from the slot of the torque limiting slot 302 and slip and rotate inside the transmission sleeve 301. This will not affect the operation of continuing to pull the flexible fence 203 to expand the warning area. There is no need to switch the operation state, which can better adapt to the rapid deployment needs of sudden road occupation construction scenarios.

[0027] For further details, please refer to [link / reference]. Figure 10 As shown: A rocker arm 205 is fixedly installed on the top of the take-up roller 202, and a handle 206 is fixedly installed on the top end of the rocker arm 205 away from the take-up roller 202.

[0028] Specifically, when the construction is completed and storage is required, simply loosen the fixing bolts at the splicing position, separate the two adjacent fences, and then turn the handle of the rocker arm 205 at the top of the take-up roller 202. The rocker arm 205 drives the take-up roller 202 to rotate in the opposite direction. On the one hand, the take-up roller 202 will reverse and rewind the flexible fence 203, allowing the flexible fence 203 to be rewound around the outside of the take-up roller 202 and stored inside the take-up drum 201. On the other hand, the reverse rotation of the take-up roller 202 will drive the transmission screw 107 to rotate in the opposite direction through the clutch transmission mechanism 300. The transmission screw 107 rotates in the opposite direction, causing the lifting push block 108 to move upward along the axial direction. The upward movement of the lifting push block 108 pulls the three support legs 102 to move in the opposite direction along the inclined guide groove 106, returning to the interior of the vertical slide groove 105. Finally, the three support legs 102 are completely retracted into the support outer cylinder 101, and the entire fence is restored to a slender columnar structure. The volume is significantly reduced compared to the unfolded state, making storage and transportation very convenient. It does not require occupying too much transportation space and greatly reduces the labor intensity of handling and storage.

[0029] This solution provides a non-destructive construction road occupancy warning telescopic fence. During installation, two workers respectively grasp the positioning seat 207 and the positioning groove 208, and simultaneously pull the flexible netting 203 away from the winding drum 201. As the flexible netting 203 is pulled out, it continuously unfolds around the winding drum 202. Under the pulling force of the flexible netting 203, the winding drum 202 rotates synchronously. When the winding drum 202 rotates, it transmits torque to the supporting outer cylinder 101 through the clutch transmission mechanism 300 connected at the bottom. The internal transmission screw 107 drives the winding roller 202 to rotate together. Since the transmission screw 107 and the lifting push block 108 movably sleeved on its outer side are connected by a threaded connection, when the transmission screw 107 rotates, the lifting push block 108, originally in a high position, will slowly move downwards along the axial direction of the supporting outer cylinder 101. During this downward movement, the lifting push block 108 will push three sliding rods 1091, along with three supporting legs 102, to move downwards synchronously through the three through-holes 1081 on it. After the foot 102 moves downwards along the vertical slide 105 from its initial state to the arc-shaped transition position between the vertical slide 105 and the inclined guide groove 106, the continuing downward-moving support foot 102 will move away from the center of the support outer cylinder 101 along the inclined guide groove 106. The three support feet 102 gradually open outwards from the inside of the support outer cylinder 101, and finally the ends of the three support feet 102 extend synchronously out of the bottom of the support outer cylinder 101, forming a stable triangular support structure on the ground. This eliminates the need for breaking or drilling into the construction ground; the support feet can be directly installed. Once the base is placed on the ground, it can be unfolded and fixed. The entire process does not require additional assembly parts. The base can be unfolded simultaneously by pulling out the flexible fence 203. The operation is simple and efficient. After the flexible fence 203 is fully pulled out, the positioning block 209 of the first fence is aligned with the positioning groove 208 on the side of the adjacent positioning seat 207 and inserted. Then, it is fixed by tightening the bolts. This allows for the quick splicing of multiple fence units. The fence length can be flexibly adjusted according to the actual size of the construction area to adapt to different scales of construction scenarios and ensure construction safety. When construction is complete and storage is required, simply loosen the fixing bolts at the splicing points, separate the two adjacent fences, and then turn the handle of the rocker arm 205 at the top of the take-up roller 202. The rocker arm 205 drives the take-up roller 202 to rotate in the opposite direction. On one hand, the take-up roller 202 will reverse and rewind the flexible fence 203, allowing the flexible fence 203 to be rewound around the outside of the take-up roller 202 and stored inside the take-up drum 201. On the other hand, the reverse rotation of the take-up roller 202 will drive the transmission screw 107 to rotate in the opposite direction through the clutch transmission mechanism 300. The transmission screw 107 rotates in the opposite direction, driving the lifting push block 108 to move upward along the axial direction. The upward movement of the lifting push block 108 pulls the three support legs 102 to move in the opposite direction along the inclined guide groove 106, returning to the interior of the vertical slide groove 105. Finally, the three support legs 102 are completely retracted into the support outer cylinder 101, and the entire fence is restored to a slender columnar structure. The volume is significantly reduced compared to the unfolded state, making storage and transportation very convenient. It does not require occupying too much transportation space and greatly reduces the labor intensity of handling and storage.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A non-destructive retractable warning fence for road occupancy during construction, characterized in that: The system includes a support body (100) and a warning tape retraction mechanism (200) connected to the support body (100). The warning tape retraction mechanism (200) is fixedly installed on the top of the support body (100). The support body (100) includes a support outer cylinder (101) and three support legs (102) movably installed inside the support outer cylinder (101). The three support legs (102) are evenly distributed along the axial direction of the support outer cylinder (101). In the initial state, the three support legs (102) are located inside the support outer cylinder (101). The warning tape take-up and take-down mechanism (200) includes a take-up drum (201) fixedly installed on the top of the support outer cylinder (101). A take-up roller (202) is rotatably installed inside the take-up drum (201). A flexible mesh (203) is fixedly installed on the outer wall of the take-up roller (202). In the initial state, the flexible mesh (203) is set around the take-up roller (202) in a winding manner.

2. The non-destructive construction road occupancy warning telescopic fence according to claim 1, characterized in that: Three guide seats (103) are fixedly installed on the inner wall of the outer support cylinder (101). The three guide seats (103) are distributed at equal angles along the axial direction of the outer support cylinder (101), and each of the three guide seats (103) has a guide groove (104) on its opposite side. The three support legs (102) are located in the three guide grooves (104) respectively. Each of the three guide seats (103) has a vertical sliding groove (105) and an inclined guide groove (106) connected to the bottom of the vertical sliding groove (105). The vertical sliding groove (105) is vertically opened. The inclined guide groove (106) is set at an acute angle with the vertical sliding groove (105), and the inclined guide groove (106) is opened at the end away from the center of the outer support cylinder (101). The connection between the vertical sliding groove (105) and the inclined guide groove (106) is a smooth arc transition.

3. The non-destructive construction road occupancy warning telescopic fence according to claim 2, characterized in that: Two pins (1021) are fixedly installed on the two sides of the support foot (102) near the vertical slide groove (105). The two pins (1021) are distributed along the opening direction of the vertical slide groove (105), and deep groove ball bearings (1022) are fixedly installed on the periphery of the pins (1021). The outer ring of the deep groove ball bearings (1022) is in contact with the inner wall of the vertical slide groove (105).

4. The non-destructive construction road occupancy warning telescopic fence according to claim 3, characterized in that: The top of the support leg (102) is provided with a sliding groove (109), and a sliding rod (1091) is fixedly installed inside the sliding groove (109). The sliding rod (1091) is axially parallel to the pin (1021). A lifting push block (108) is movably arranged inside the support outer cylinder (101). The lifting push block (108) has three protrusions extending outward from its center, and each protrusion extends into the sliding groove (109) at the corresponding position. The three protrusions of the lifting push block (108) are all provided with a lifting push groove (1081) through them. The inner wall of the lifting push groove (1081) is slidably connected to the outer wall of the sliding rod (1091).

5. A non-destructive construction road occupancy warning telescopic fence according to claim 4, characterized in that: A transmission screw (107) is rotatably installed inside the outer support cylinder (101). The transmission screw (107) is coaxial with the outer support cylinder (101). The transmission screw (107) passes through the lifting push block (108) vertically and is threadedly connected to the lifting push block (108). This is suitable for the transmission screw (107) to rotate, thereby driving the lifting push block (108) to move up and down, and in turn driving the three support legs (102) to unfold towards the bottom of the outer support cylinder (101) or to retract into the outer support cylinder (101).

6. A non-destructive construction road occupancy warning telescopic fence according to claim 5, characterized in that: Anti-slip pads (1023) are fixedly installed at the ends of the supporting legs (102).

7. A non-destructive construction road occupancy warning telescopic fence according to claim 6, characterized in that: The outer wall of the take-up roller (202) includes two flexible meshes (203), and the two flexible meshes (203) are symmetrical about the axial direction of the take-up roller (202). The outer wall of the take-up drum (201) has two through openings (204) for accommodating the flexible meshes (203). The flexible meshes (203) extend to the outside of the take-up drum (201) through the through openings (204). The take-up roller (202) is coaxial with the drive screw (107), and a clutch transmission mechanism (300) is provided between the bottom of the take-up roller (202) and the top of the drive screw (107) for transmitting the torque of the take-up roller (202) to the drive screw (107) through the clutch transmission mechanism (300).

8. A non-destructive construction road occupancy warning telescopic fence according to claim 7, characterized in that: The clutch transmission mechanism (300) includes a transmission sleeve (301) fixedly installed on the top of the transmission screw (107). The transmission sleeve (301) is a hollow columnar structure with an open top. Several annularly distributed torque limiting grooves (302) are opened on the inner wall of the transmission sleeve (301). A drive seat (303) is fixedly installed at the bottom of the take-up roller (202). The drive seat (303) is located in the hollow structure at the top of the transmission sleeve (301). Several elastic clips (304) are fixedly installed on the outer wall of the drive seat (303). The elastic clips (304) are elastic. One end of several elastic clips (304) away from the drive seat (303) is provided with a clip head (3041) that matches the specification of the torque limiting groove (302). The clip head (3041) is locked inside the torque limiting groove (302).

9. A non-destructive construction road occupancy warning telescopic fence according to claim 8, characterized in that: A rocker arm (205) is fixedly installed on the top of the take-up roller (202), and a handle (206) is fixedly installed on the end of the rocker arm (205) away from the take-up roller (202).

10. A non-destructive construction road occupancy warning telescopic fence according to claim 9, characterized in that: Two openings (204) on the take-up roller (202) are respectively fixedly installed with a positioning seat (207) and a positioning block (209) at the far end. The positioning seat (207) has a positioning groove (208) on the side near the positioning block (209) to accommodate the insertion of the positioning block (209). The positioning block (209) is inserted into the positioning groove (208), and the positioning block (209) and the positioning seat (207) are fastened together by bolts.

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