Car arrester for road construction

Abstract

The invention relates to a car arrester for road construction, and belongs to the field of road engineering safety devices.The car arrester comprises a launching device and a resistance net, the launching device comprises a rack, a response mechanism and a power mechanism, the rack is fixedly arranged on one side of a road, and the response mechanism is used for judging whether a car enters a construction area or not; the power mechanism is used for sending the resistance net into a construction area when a vehicle enters the construction area, and the resistance net is used for being wound on a front axle of the vehicle. After it is detected that the vehicle breaks into the road construction area, the power mechanism sends the resistance net into the construction area, the resistance net is arranged on the ground of the construction area, when the vehicle rolls over the resistance net, the resistance net can be wound around a front axle of the vehicle to improve the rotation resistance of front wheels, rapid braking of the vehicle is facilitated, and the service life of the vehicle is prolonged. Therefore, the safety of workers in a construction area is protected.

Description

Technical Field

[0001] The present application relates to the field of road engineering safety devices, and in particular to a vehicle blocker for road construction. Background Art

[0002] When road construction and maintenance ensure traffic flow, safety protection facilities such as warning signs, warning racks, traffic cones, etc. are usually set up at the back of the construction area, and the placement of the safety protection devices still needs to reserve a certain safety distance from the actual construction site.

[0003] However, due to various subjective or objective reasons, motor vehicles often break through protective facilities and enter the construction area. If the motor vehicle is traveling too fast or the ground is slippery, there is no guarantee that the motor vehicle can successfully brake within a safe distance, resulting in casualties among construction workers. Summary of the invention

[0004] In order to improve the above problems, the present application provides a vehicle blocker for road construction.

[0005] The present application provides a road construction vehicle blocker that adopts the following technical solution: A vehicle blocker for road construction comprises a launching device and a resistance net, wherein the launching device comprises a frame, a response mechanism and a power mechanism, wherein the frame is fixedly arranged beside the road, the response mechanism is used to detect whether a vehicle enters a construction area, the power mechanism is used to send the resistance net into the construction area when the vehicle enters the construction area, and the resistance net is used to be wound around the front axle of the vehicle.

[0006] By adopting the above technical solution, when a vehicle is detected to have entered the construction area, the power mechanism will send the resistance net into the construction area so that the resistance net is placed on the ground in the construction area. When the vehicle runs over the resistance net, the resistance net can be wrapped around the front axle of the vehicle to increase the rotational resistance of the front wheels, which helps to quickly brake the vehicle, thereby protecting the safety of workers in the construction area.

[0007] Preferably, the power mechanism includes a launching tube, a propulsion piston and a driving assembly, the launching tube is fixedly connected to the frame, the propulsion piston slides in the launching tube, the driving assembly provides moving power for the propulsion piston, one end of the resistance net is relatively fixed to the road, and the other end is connected to a traction elastic bullet, the traction elastic bullet is placed in the launching tube, and the propulsion piston and the traction elastic bullet are abutted on the side facing away from the muzzle of the launching tube.

[0008] Preferably, the driving assembly includes an energy storage spring, a connecting block, a force storage rack, a one-way plate tooth gear and a non-return pawl. The connecting block slides in the launching tube and is located on the side of the propulsion piston away from the traction elastic spring. One end of the energy storage spring is connected to the propulsion piston, and the other end is connected to the connecting block. One end of the force storage rack is fixedly connected to the side of the connecting block away from the energy storage spring. The one-way plate tooth gear and the non-return pawl are both connected to the frame and respectively mesh with the force storage rack. The power mechanism also includes a safety assembly, which is used to temporarily fix the propulsion piston at a predetermined position in the launching tube. In a natural state, the non-return pawl is used to prevent the force storage rack from moving toward the side away from the propulsion piston.

[0009] By adopting the above technical solution, the propulsion piston is first moved to a position where it can be fixed by the safety assembly, and then the one-way plate tooth gear and the non-return pawl are used to control the force storage rack and the connecting block to move close to the propulsion piston, compressing the energy storage spring to store elastic potential energy. When the response mechanism detects that a vehicle has entered the construction area, the safety is released, the energy storage spring pops open instantly, and the propulsion piston moves quickly to launch the traction elastic bullet.

[0010] Preferably, the safety assembly includes a safety pin, a safety tension spring and a release rod, an initial position rod is slidably arranged on the propulsion piston, the sliding direction of the initial position rod is perpendicular to the sliding direction of the propulsion piston, the safety pin is slidably connected to the launching tube, the sliding direction is parallel to the sliding direction of the initial position rod relative to the propulsion piston, the release rod slides relative to the frame, a safety hole is opened on the wall of the launching tube, the sliding direction of the release rod is consistent with the sliding direction of the safety pin and both are coaxial with the safety hole, one end of the safety tension spring is connected to the launching tube, and the other end is connected to the safety pin, when the initial position rod is located at a position coaxial with the safety pin, the safety pin abuts the initial position rod, the end of the initial rod away from the safety pin is inserted into the safety hole and abuts against the release rod, and the response mechanism is used to control the sliding of the release rod.

[0011] By adopting the above technical solution, when the propulsion piston is in a predetermined position, under the action of the safety tension spring, the end of the safety pin abuts against and pushes the initial position rod, so that the end of the initial position rod away from the safety pin is inserted into the safety hole and abuts against the release rod. Since the end of the initial position rod close to the release rod is located in the safety hole at this time, the propulsion piston cannot slide relative to the launching tube.

[0012] Preferably, the response mechanism includes a detection member and a transmission assembly, the detection member is located in the construction area and is relatively fixed to the road, the transmission assembly is arranged on a frame, the output end of the transmission assembly is connected to a release rod, and when a vehicle passes through the detection position of the detection member, the detection member causes the input end of the transmission assembly to apply a thrust, pushing the release rod to move closer to the initial position rod.

[0013] Preferably, it also includes a receiving box, which is located on the side opposite to the construction area and the frame, and has a receiving port on the side of the receiving box facing the frame. The receiving box is hinged with a one-way valve plate at the receiving port, and the one-way valve plate can only be flipped inside the receiving box.

[0014] By adopting the above technical solution, when the one-way valve plate is impacted by the traction elastic spring, it flips over, the traction elastic spring enters the receiving box, the one-way valve plate is reset, and the traction elastic spring is not easy to bounce out of the receiving box, thereby reducing the safety hazard caused by the traction elastic spring rolling outside.

[0015] Preferably, a traction rope is fixedly connected between the traction elastic spring and the resistance net, a core tube is fixedly connected inside the traction elastic spring, a winding drum is coaxially rotatably connected inside the core tube, the end of the traction rope away from the resistance net is fixedly connected to the winding drum, a coil spring is connected between the winding drum and the core tube, and a stopper is provided on the thrust piston, and the stopper is used to make the winding drum and the core tube relatively stationary when the traction elastic spring and the thrust piston are in contact.

[0016] Preferably, the stop member is a stop pin, the length of the stop pin is consistent with the sliding direction of the thrust piston, a stop hole is provided on the core tube, a matching groove is provided on the winding tube, the axes of the stop hole and the matching groove are both radially of the core tube, and a mounting hole coaxial with the stop hole is provided on the traction elastic spring, the stop pin passes through the mounting hole, the stop hole and the matching groove in sequence, and the groove wall of the matching groove abuts against the side wall of the stop pin.

[0017] By adopting the above technical solution, during the loading process and in the unfired state, the core tube and the winding tube are relatively still when the stop pin is required, and the traction rope is pulled out of the traction elastic bullet and maintained outside the core tube, so that the resistance net will not be dragged into the launching tube.

[0018] Preferably, an auxiliary block is slidably provided on the propulsion piston, and its sliding direction is consistent with that of the propulsion piston. An auxiliary spring is connected between the auxiliary block and the propulsion piston. The stop pin and the auxiliary block are fixedly connected. In a natural state, the auxiliary spring applies a thrust toward the traction elastic spring to the auxiliary block. A force-bearing block is fixedly connected to the inner wall of the muzzle of the launching tube. When the propulsion piston moves to the muzzle of the launching tube, the force-bearing block and the side of the auxiliary block facing away from the auxiliary spring abut against each other.

[0019] By adopting the above technical solution, when the propulsion piston is pushed to the mouth of the launch tube by the energy storage spring, the force block and the auxiliary block abut against the side away from the auxiliary spring, the auxiliary block and the anti-rotation pin stop, and under the action of inertia, the propulsion piston and the traction elastic bullet continue to move forward, the propulsion piston and the anti-rotation pin slide relative to each other, the anti-rotation pin can be easily disengaged from the matching groove, and finally disengaged from the mounting hole, and then the propulsion piston decelerates, and the traction elastic bullet and the propulsion piston are separated. During the traction elastic bullet's suspension process, the winding spring drives the winding drum to rotate to reel in the traction rope; the end of the resistance net close to the traction elastic bullet gradually approaches the traction elastic bullet, so that after the traction elastic bullet enters the receiving box, the resistance net can cover the construction area more horizontally.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the setting of the launch device and the resistance net, when a vehicle is detected to have entered the construction area, the power mechanism will send the resistance net into the construction area and place it on the ground in the construction area. When the vehicle runs over the resistance net, the resistance net can be wrapped around the front axle of the vehicle to increase the rotation resistance of the front wheel, which helps the vehicle to brake quickly, thereby protecting the safety of the workers in the construction area; 2. Through the setting of the driving component, the propulsion piston is first moved to a position where it can be fixed by the safety component, and then the one-way plate tooth gear and the non-return ratchet are used to control the storage rack and the connecting block to move close to the propulsion piston, compressing the energy storage spring to store elastic potential energy. When the response mechanism detects that a vehicle has entered the construction area, the safety is released, the energy storage spring pops open instantly, and the propulsion piston moves quickly to launch the traction elastic bullet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a vehicle blocker for road construction in the first embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the layout position of the vehicle blocker used for road construction in the first embodiment of the present application.

[0023] Figure 3 It is a structural schematic diagram used to reflect the layout position of the vehicle blocker for road construction in the second embodiment of the present application.

[0024] Figure 4 It is a cross-sectional schematic diagram for illustrating the matching structure of the traction elastic spring and the propulsion piston in the second embodiment of the present application.

[0025] Description of the reference numerals: 1. resistance net; 11. traction rope; 12. traction elastic spring; 121. mounting hole; 13. take-up drum; 131. matching groove; 14. core tube; 141. coil spring; 142. anti-rotation hole; 2. launching device; 21. frame; 22. receiving box; 221. receiving port; 222. one-way valve plate; 3. response mechanism; 31. detection component; 311. long plate; 312. conduction lever; 32. transmission component; 321. connecting rod transmission mechanism; 4. Power mechanism; 41. Launch tube; 411. Safety hole; 412. Propulsion piston; 413. Initial position rod; 414. Stop pin; 415. Auxiliary block; 416. Auxiliary spring; 417. Force block; 42. Driving assembly; 421. Energy storage spring; 422. Connecting block; 423. Energy storage rack; 426. Pull ring; 424. One-way plate tooth gear; 425. Check pawl; 43. Safety assembly; 431. Safety pin; 432. Safety tension spring; 433. Release rod. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] Embodiment 1: The present application embodiment discloses a vehicle blocker for road construction, such as Figure 1 and 2 As shown, it includes a launching device 2 and a resistance net 1. The launching device 2 includes a frame 21, a response mechanism 3 and a power mechanism 4. The frame 21 is fixedly arranged beside the road. The response mechanism 3 is used to determine whether the vehicle enters the construction area. The power mechanism 4 is used to send the resistance net 1 into the construction area when the vehicle enters the construction area, so that the resistance net 1 is laid on the road surface in front of the vehicle. When the vehicle runs over, the resistance net 1 is used to be wound around the front axle or wheel of the vehicle to increase the rotational resistance of the wheel and improve the friction between the wheel and the ground, so as to achieve the purpose of rapid braking.

[0028] like Figure 1As shown, the resistance net 1 is a high-strength nylon and carbon fiber blended woven material, one end of which is relatively fixed to the guardrail of the road, and the other end is connected to a traction elastic bullet 12. A traction rope 11 of the same material as the resistance net 1 is fixedly connected between the traction elastic bullet 12 and the resistance net 1; the material of the traction elastic bullet 12 is highly elastic rubber, and it can restore its initial shape even after being crushed. The power mechanism 4 includes a launch tube 41, a propulsion piston 412, a safety assembly 43 and a driving assembly 42. The launch tube 41 is fixedly connected to the frame 21, and the connection point between the resistance net 1 and the guardrail is located below the launch tube 41; the propulsion piston 412 slides in the launch tube 41 along its length direction, and the driving assembly 42 provides the propulsion piston 412 with moving power. The traction elastic bullet 12 is placed in the launch tube 41, and the propulsion piston 412 abuts against the side of the traction elastic bullet 12 away from the launch tube 41, that is, the propulsion piston 412 moves toward the launch tube 41 The mouth of the barrel can eject the traction elastic bullet 12.

[0029] like Figure 1 As shown, the safety assembly 43 is used to temporarily fix the propulsion piston 412 at a predetermined position in the launch tube 41. The safety assembly 43 includes a safety pin 431, a safety tension spring 432 and a release rod 433. An initial position rod 413 is slidably provided on the propulsion piston 412. The sliding direction of the initial position rod 413 is perpendicular to the sliding direction of the propulsion piston 412. The safety pin 431 is slidably connected to the launch tube 41. The sliding direction is parallel to the sliding direction of the initial position rod 413 relative to the propulsion piston 412. The release rod 433 slides relative to the frame 21. A safety hole 411 is opened on the wall of the launch tube 41. The sliding direction of the release rod is consistent with the sliding direction of the safety pin 431 and both are coaxial with the safety hole 411. One end of the safety tension spring 432 is connected to the launching tube 41, and the other end is connected to the safety pin 431. When the advancing piston 412 is located at a position where the initial position rod 413 is located coaxially with the safety pin 431, under the action of the safety tension spring 432, the end of the safety pin 431 abuts against and pushes the initial position rod 413, so that the end of the initial position rod 413 away from the safety pin 431 is inserted into the safety hole 411 and abuts against the release rod 433. Since the end of the initial position rod 413 close to the release rod 433 is located in the safety hole 411 at this time, the advancing piston 412 cannot slide relative to the launching tube 41.

[0030] like Figure 1As shown, the driving assembly 42 includes an energy storage spring 421, a connecting block 422, a power storage rack 423, a one-way plate tooth gear 424 and a non-return pawl 425. The connecting block 422 slides in the launching tube 41 and is located on the side of the propulsion piston 412 away from the traction elastic spring 12. One end of the energy storage spring 421 is fixedly connected to the propulsion piston 412, and the other end is fixedly connected to the connecting block 422. One end of the power storage rack 423 is fixedly connected to the side of the connecting block 422 away from the energy storage spring 421, and The length direction of the power storage rack 423 is consistent with the length direction of the launch tube 41. The one-way plate tooth gear 424 and the non-return pawl 425 are connected to the frame 21 and mesh with the power storage rack 423 respectively. In the natural state, the non-return pawl 425 is used to prevent the power storage rack 423 from moving toward the side away from the propulsion piston 412, and this can only be operated by a torque tool to operate the one-way plate tooth gear 424 to rotate in one direction, and the rotation direction is the direction in which the gear pair causes the power storage rack 423 to move toward the connection block 422. When the propulsion piston 412 is "fixed" at the safety hole 411 by the initial position rod 413, the operator moves the connection block 422 close to the propulsion piston 412 through the one-way plate tooth gear 424 and the power storage rack 423, so that the energy storage spring 421 is in a compressed state.

[0031] like Figure 1 As shown, the response mechanism 3 is used to control the sliding of the release rod 433. The response mechanism 3 includes a detection member and a transmission assembly 32. The detection member is located in the construction area and is relatively fixed to the road. In this embodiment, the detection member includes a long plate 311 with a spring placed on the road and a transmission lever 312 located at the edge of the road. One end of the transmission lever 312 is located below the long plate 311, and the other end is located below the frame 21. The transmission assembly 32 is arranged in the frame 21, and its form is a connecting rod transmission mechanism 321. The connecting rod transmission mechanism 321 is composed of a plurality of connecting rods and levers and other components, which can realize the directional transmission of thrust. The release rod 433 is located at the output end of the connecting rod transmission mechanism 321, and the end of the transmission lever 312 away from the long plate 311 is located below the input end of the connecting rod transmission mechanism 321. When the long board 311 is crushed by the wheels, it swings down, and the transmission lever 312 is pressed down at one end close to the long board 311 and lifted at the other end, inputting thrust to the connecting rod transmission mechanism 321. Under the action of the connecting rod transmission mechanism 321, the output end of the connecting rod transmission mechanism 321 finally pushes the release rod 433 to move close to the initial position rod 413, and the initial position rod 413 is pushed out from the safety hole 411, and the end of the safety pin 431 is also pushed out of the inner cavity of the launching tube 41, so that the propulsion piston 412 can slide in the launching tube 41. At this time, the elastic potential energy of the energy storage spring 421 is instantly released, pushing the propulsion piston 412 quickly toward the barrel mouth of the launching tube 41 to push out the traction elastic bullet 12 to achieve the launching purpose.

[0032] like Figure 1As shown in FIG. 2 , when reloading, the anti-return pawl 425 must be manually opened, the power rack 423 is pulled backward, and the connecting block 422 drags the push piston 412 back through the power spring 421 until the safety assembly 43 can "fix" the push piston 412 again and then release the anti-return pawl 425. In order to facilitate pulling the power rack 423, a pull ring 426 is hung at the end of the power rack 423. In this embodiment, the direction of the launch tube 41 forms an angle of 30° with the driving direction.

[0033] Embodiment 2: like Figure 3 As shown, on the basis of the first embodiment, the car blocker of this embodiment further includes a receiving box 22, which is located on the side opposite to the construction area and the frame 21, and the receiving box 22 can be reinforced and placed by a water-filled anti-collision bucket. A receiving port 221 is provided on the side of the receiving box 22 facing the frame 21, and a one-way valve plate 222 is hinged at the receiving port 221 of the receiving box 22, and the one-way valve plate 222 can only be turned over inside the receiving box 22. In a natural state, the one-way valve plate 222 closes the receiving port 221. When the one-way valve plate 222 receives the impact of the traction elastic spring 12, it turns over, and the traction elastic spring 12 enters the receiving box 22. The one-way valve plate 222 is reset, and the traction elastic spring 12 is not easy to bounce out of the receiving box 22, thereby reducing the safety hazard caused by the traction elastic spring 12 rolling outside.

[0034] like Figure 4 As shown, a core tube 14 is fixedly connected inside the traction elastic bullet 12, and a reel 13 is coaxially rotatably connected inside the core tube 14. The end of the traction rope 11 away from the resistance net 1 is fixedly connected to the reel 13, and a coil spring 141 is connected between the reel 13 and the core tube 14. In a natural state, the reel 13 rotates due to the torsion from the coil spring 141, and the traction rope 11 is reeled until the edge of the resistance net 1 contacts the traction elastic bullet 12. A stopper is provided on the thrust piston 412, and the stopper is used to keep the reel 13 and the core tube 14 relatively still when the traction elastic bullet 12 and the thrust piston 412 are in contact, that is, during the loading process and in the unfired state, the traction rope 11 needs to be pulled out of the traction elastic bullet 12 and kept outside the core tube 14, so that the resistance net 1 will not be dragged into the launch tube 41.

[0035] like Figure 4As shown, the stop member is a stop pin 414, and an auxiliary block 415 is slidably arranged on the thrust piston 412, and the sliding direction is consistent with the sliding direction of the thrust piston 412. An auxiliary spring 416 is connected between the auxiliary block 415 and the thrust piston 412, and the stop pin 414 and the auxiliary block 415 are fixedly connected. In a natural state, the auxiliary spring 416 applies a thrust to the auxiliary block 415 toward the traction elastic spring 12. The length of the stop pin 414 is consistent with the sliding direction of the thrust piston 412, a stop hole 142 is provided on the core tube 14, a matching groove 131 is provided on the wall of the winding drum 13, and a mounting hole 121 coaxial with the stop hole 142 is provided on the traction elastic spring 12; the traction rope 11 is dragged from the winding drum 13, the matching groove 131 and the stop hole 142 are coaxial, and then the stop pin 414 is passed through the mounting hole 121, the stop hole 142 and the matching groove 131 in sequence, and the groove wall of the matching groove 131 abuts against the side wall of the stop pin 414. At this time, the winding drum 13 cannot rotate relative to the core tube 14, and the traction elastic spring 12 also abuts against the thrust piston 412. A force block 417 is fixedly connected to the inner wall at the muzzle of the launching tube 41. When the propulsion piston 412 is pushed to the muzzle of the launching tube 41 by the energy storage spring 421, the force block 417 and the auxiliary block 415 abut against the side away from the auxiliary spring 416, and the auxiliary block 415 and the stop pin 414 stop. Under the action of inertia, the propulsion piston 412 and the traction elastic bullet 12 continue to move forward, and the propulsion piston 412 and the stop pin 414 slide relatively, so that the stop pin 414 can be easily disengaged from the matching groove 131 and finally disengaged from the mounting hole 121. Then the propulsion piston 412 decelerates, and the traction elastic bullet 12 and the propulsion piston 412 are separated. When the traction elastic spring 12 is suspended in the air, the coil spring 141 drives the winding drum 13 to rotate to wind up the traction rope 11; the end of the resistance net 1 close to the traction elastic spring 12 gradually approaches the traction elastic spring 12, so that after the traction elastic spring 12 enters the receiving box 22, the resistance net 1 can cover the construction area more horizontally.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vehicle blocker for road construction, characterized in that: The invention comprises a launching device (2) and a resistance net (1), wherein the launching device (2) comprises a frame (21), a response mechanism (3) and a power mechanism (4), wherein the frame (21) is fixedly arranged beside a road, the response mechanism (3) is used to detect whether a vehicle has entered a construction area, and the power mechanism (4) is used to send the resistance net (1) into the construction area when the vehicle enters the construction area, and the resistance net (1) is used to be wound around the front axle of the vehicle.

2. A vehicle blocker for road construction according to claim 1, characterized in that: The power mechanism (4) comprises a launch tube (41), a propulsion piston (412) and a driving assembly (42); the launch tube (41) and the frame (21) are fixedly connected; the propulsion piston (412) slides in the launch tube (41); the driving assembly (42) provides moving power for the propulsion piston (412); one end of the resistance net (1) is relatively fixed to the road; the other end is connected to a traction elastic bullet (12); the traction elastic bullet (12) is placed in the launch tube (41); the propulsion piston (412) and the traction elastic bullet (12) are in abutment with each other on a side away from the barrel mouth of the launch tube (41).

3. A vehicle blocker for road construction according to claim 2, characterized in that: The driving assembly (42) comprises an energy storage spring (421), a connection block (422), a power storage rack (423), a one-way plate tooth gear (424) and a non-returning ratchet (425); the connection block (422) slides in the launching tube (41) and is located on the side of the propulsion piston (412) away from the traction elastic spring (12); one end of the energy storage spring (421) is connected to the propulsion piston (412), and the other end is connected to the connection block (422); one end of the power storage rack (423) is fixedly connected to the connection block (42 2) on a side away from the energy storage spring (421), the one-way plate tooth gear (424) and the non-return pawl (425) are both connected to the frame (21) and are respectively engaged with the energy storage rack (423), the power mechanism (4) also includes a safety component (43), the safety component (43) is used to temporarily fix the propulsion piston (412) at a predetermined position in the launch tube (41), and in a natural state, the non-return pawl (425) is used to prevent the energy storage rack (423) from moving toward a side away from the propulsion piston (412).

4. A vehicle blocker for road construction according to claim 3, characterized in that: The safety assembly (43) comprises a safety pin (431), a safety tension spring (432) and a release rod (433); an initial position rod (413) is slidably arranged on the propulsion piston (412); the sliding direction of the initial position rod (413) is perpendicular to the sliding direction of the propulsion piston (412); the safety pin (431) is slidably connected to the launch tube (41); the sliding direction is parallel to the sliding direction of the initial position rod (413) relative to the propulsion piston (412); the release rod (433) slides relative to the frame (21); a safety hole (411) is opened on the wall of the launch tube (41); and the release rod (433) is slidably connected to the launch tube (41); and the release rod (433) is slidably connected to the launch tube (41); and the safety hole (411) is opened on the wall of the launch tube (41). The sliding direction of the rod (433) is consistent with the sliding direction of the safety pin (431), and both are coaxial with the safety hole (411). One end of the safety tension spring (432) is connected to the launching tube (41), and the other end is connected to the safety pin (431). When the initial position rod (413) is located at a position coaxial with the safety pin (431), the safety pin (431) abuts against the initial position rod (413). One end of the initial position rod (413) away from the safety pin (431) is inserted into the safety hole (411) and abuts against the release rod (433). The response mechanism (3) is used to control the sliding of the release rod (433).

5. A vehicle blocker for road construction according to claim 4, characterized in that: The response mechanism (3) comprises a detection member and a transmission assembly (32). The detection member is located in a construction area and is relatively fixed to the road. The transmission assembly (32) is arranged on a frame (21). The output end of the transmission assembly (32) is connected to a release rod (433). When a vehicle passes through a detection position of the detection member, the detection member causes the input end of the transmission assembly (32) to apply a thrust, thereby pushing the release rod (433) to move closer to the initial position rod (413).

6. A vehicle blocker for road construction according to any one of claims 2 to 5, characterized in that: The invention also comprises a receiving box (22), wherein the receiving box (22) is located at a side opposite to the construction area and the frame (21), and a receiving opening (221) is provided on the side of the receiving box (22) facing the frame (21), and a one-way valve plate (222) is hingedly connected to the receiving opening (221) of the receiving box (22), and the one-way valve plate (222) can only be turned over inside the receiving box (22).

7. A vehicle blocker for road construction according to claim 6, characterized in that: A traction rope (11) is fixedly connected between the traction elastic spring (12) and the resistance net (1), a core tube (14) is fixedly connected inside the traction elastic spring (12), a winding drum (13) is coaxially rotatably connected inside the core tube (14), one end of the traction rope (11) away from the resistance net (1) is fixedly connected to the winding drum (13), a coil spring (141) is connected between the winding drum (13) and the core tube (14), and a stopper is provided on the propulsion piston (412), and the stopper is used to keep the winding drum (13) and the core tube (14) relatively still when the traction elastic spring (12) and the propulsion piston (412) are in contact.

8. A vehicle blocker for road construction according to claim 7, characterized in that: The anti-rotation component is a anti-rotation pin (414), the length of which is consistent with the sliding direction of the thrust piston (412), the core tube (14) is provided with a anti-rotation hole (142), the winding tube (13) is provided with a matching groove (131), the axes of the anti-rotation hole (142) and the matching groove (131) are both radially of the core tube (14), the traction elastic spring (12) is provided with a mounting hole (121) coaxial with the anti-rotation hole (142), the anti-rotation pin (414) passes through the mounting hole (121), the anti-rotation hole (142) and the matching groove (131) in sequence, and the groove wall of the matching groove (131) abuts against the side wall of the anti-rotation pin (414).

9. A vehicle blocker for road construction according to claim 8, characterized in that: An auxiliary block (415) is slidably arranged on the propulsion piston (412), and its sliding direction is consistent with that of the propulsion piston (412); an auxiliary spring (416) is connected between the auxiliary block (415) and the propulsion piston (412); the stop pin (414) and the auxiliary block (415) are fixedly connected; in a natural state, the auxiliary spring (416) applies a thrust to the auxiliary block (415) toward the traction elastic spring (12); a force-bearing block (417) is fixedly connected to the inner wall at the barrel mouth of the launch tube (41); when the propulsion piston (412) moves to the barrel mouth of the launch tube (41), the force-bearing block (417) and the side of the auxiliary block (415) facing away from the auxiliary spring (416) abut against each other.

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