A warning device for construction

Abstract

The present invention provides a warning device for construction, which belongs to the technical field of construction, and effectively solves the problems of the currently used warning devices being inconvenient to move, having poor warning effects, and being difficult to stably place on sloping ground. The technical scheme includes an installation box, two cylindrical rollers are symmetrically arranged on both sides of the bottom of the installation box, and both rollers are connected to a balancing mechanism. A warning frame is arranged on the top of the installation box, and a number of fixed warning plates and a number of corresponding movable warning plates are respectively arranged on the warning frame. The warning frame is connected to a swing mechanism, and an opening and closing mechanism is arranged between the fixed warning plate and the corresponding movable warning plate, and the opening and closing mechanism is movably coordinated with the swing mechanism. The beneficial effects of the present invention are: providing a warning device for construction that is easy to move, has a better warning effect, and can be stably placed on a sloping ground.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a warning device for building construction. Background Art

[0002] Construction refers to production activities during the implementation phase of engineering construction, and is the construction process of various types of buildings, including foundation construction, main structure construction, roof construction, decoration construction, etc. The place where the construction work takes place is called a "construction site" or "construction site", also known as a construction site. Construction sites are complex, and for the sake of construction safety, warning devices are generally required at construction sites to remind workers where there is danger or to warn against theft.

[0003] However, existing warning devices for construction generally use a fixed support structure and a warning board that are integrally formed and fixedly connected, which has many problems: the warning device is inconvenient to move; the warning board displays warning slogans on one side, resulting in a limited display range; the warning device is fixed, resulting in poor warning effects; and it is difficult to stably place the warning device on a slope.

[0004] Therefore how to solve the above-mentioned technical problems just becomes the problem that the present invention faces. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a warning device for construction which is easy to move, has a better warning effect, and can be stably placed on a sloped ground.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention provides a warning device for construction, including an installation box, two cylindrical rollers are symmetrically arranged on both sides of the bottom of the installation box, and the two rollers are connected to a balancing mechanism;

[0007] A warning frame is provided on the top of the installation box, and a plurality of fixed warning plates and a plurality of corresponding movable warning plates are respectively provided on the warning frame;

[0008] The warning frame is connected with a swing mechanism, and an opening and closing mechanism is arranged between the fixed warning plate and the corresponding movable warning plate, and the opening and closing mechanism is movably matched with the swing mechanism.

[0009] The installation box is a rectangular structure and is arranged horizontally, and the bottom of the installation box is provided with symmetrically parallel sliding grooves on both sides of the short sides close to the bottom surface thereof;

[0010] The balancing mechanism comprises a slide plate vertically slidably connected in each of the slide grooves, the bottom of each of the slide plates is rotatably connected to one of the rollers, a first screw rod vertically arranged upward is fixedly connected to the center of the top of each of the slide plates, the upper side of each of the first screw rods is coaxially sleeved in a threaded sleeve and threadedly matched with the threaded sleeve, the bottom of each of the threaded sleeves is rotatably connected to a fixed plate horizontally arranged in the upper installation box, and the fixed plate is provided with a through hole matched with the inner diameter of the threaded sleeve;

[0011] A first worm wheel is coaxially sleeved on the outer side of each threaded sleeve, each first worm wheel is meshed with a first worm, each first worm is rotatably connected in the installation box and one end thereof passes through the outer side of the installation box and is fixedly connected to the handle.

[0012] The balancing mechanism comprises a counterweight block slidably connected to the inner side of the bottom surface of the installation box, a threaded hole is provided at the center of the counterweight block, a second screw is threadedly connected to the threaded hole, and two ends of the second screw are rotatably connected to two sides of the sliding frame;

[0013] A second worm wheel is coaxially sleeved on the outside of one side of the second screw, the second worm wheel is meshed with the second worm, both ends of the second worm are rotatably connected to the sliding frame, a first transmission plate is coaxially sleeved on one side of the second worm, wherein the first worm near the second worm is coaxially sleeved on the second transmission plate, and a transmission belt is sleeved between the first transmission plate and the second transmission plate.

[0014] The top of the installation box is an open structure, and a cover plate is arranged above the balancing mechanism;

[0015] The swing mechanism comprises a swing plate arranged above the cover plate, a first rotating rod is passed through the center of the swing plate, two ends of the first rotating rod are rotatably connected to two sides of the top opening of the installation box and extend to the outside of the installation box, one end of the first rotating rod is coaxially fixedly connected to a driving disk, and a plurality of driving columns that are perpendicular to the disk surface of the driving disk are evenly fixedly connected along the circumferential direction near the edge of the driving disk away from the installation box;

[0016] A second rotating rod rotatably connected to a rotating seat is arranged near the driving disk and away from the mounting box. Two missing gears are coaxially sleeved on the outer side of the second rotating rod corresponding to the left and right sides of the driving disk. The gear blocks of the two missing gears are arranged in opposite directions to each other. Both of the two missing gears are meshed with the driving column.

[0017] The second rotating rod is coaxially fixedly connected to the output end of the driving motor.

[0018] The warning frame includes a fixing column fixedly connected to the hollow structure at the center of the top of the swing plate, the upper side of the fixing column is sleeved on the inner center of the mounting frame, the mounting frame is a closed structure in which three rectangular mounting plates are connected end to end, the cross-section of the mounting frame is an equilateral triangle, and the top of the mounting frame is a closed structure;

[0019] One lateral side edge of the outer wall of each mounting plate is hinged to one side edge of the fixed warning plate, one side edge of each fixed warning plate away from its hinged end is fixedly connected to one side edge of the movable warning plate, and one side edge of each movable warning plate away from the fixed warning plate to which it is connected is fixedly connected to the other side edge of the mounting plate;

[0020] The movable warning plate is made of a foldable and retractable flexible material.

[0021] The opening and closing mechanism comprises a sliding column coaxially slidably connected to the inner side of the fixed column;

[0022] The top of the fixed column is provided with three through slots corresponding to the three fixed warning plates from top to bottom, a third rotating rod is fixedly connected between the two sides of each slot, each of the third rotating rods is rotatably connected to the inside of one side of a support rod, one end of each support rod close to the third rotating rod is located on the inner side of the fixed column and a connecting plate perpendicular to it is fixedly connected at its bottom, and the fourth rotating rod is fixedly connected to one end of the connecting plate away from the support rod;

[0023] The top of the sliding column corresponds to the three connecting plates, and three grooves are opened from top to bottom. A pull rod is arranged in each of the grooves. The top of each pull rod is rotatably connected to the corresponding fourth rotating rod, and the bottom end is slidably connected to the connecting groove arranged along the radial direction of the sliding column at the bottom of the groove.

[0024] Corresponding to each of the support rods, a through opening is provided on each of the mounting plates, and one end of the support rod away from the third rotating rod is movably matched with the fixed warning plate located on the same side through the opening.

[0025] The fixed column has two through slots symmetrically formed along its axial direction on both sides near the bottom, and the two sides of the bottom of the sliding column are symmetrically fixedly connected along its radial direction with clamping rods extending to the outside of the through slots on the same side, and a spring is fixedly connected between the bottom of the sliding column and the bottom of the fixed column;

[0026] Corresponding to the two clamping rods, limit frames are arranged on both sides of the top of the installation box, and each clamping rod is engaged with the limit frame on the corresponding side;

[0027] A tension spring box is arranged on the inner side of each mounting plate, and the inner end of each tension spring box is fixedly connected to one end of a tension spring, and the other end of the tension spring passes through an opening formed in the mounting plate and is fixedly connected to the inner side of the corresponding fixed warning plate.

[0028] The first rotating rod has one end away from the driving disc and is rotatably connected to one end of the swing hammer handle, and bells are symmetrically arranged on both sides of the hammer head of the swing hammer.

[0029] A plurality of insertion holes are evenly arranged on both sides of each roller along the circumferential direction, and a fixing hole is opened at the bottom of the slide plate corresponding to the insertion hole, and a latch is movably matched between the insertion hole and the corresponding fixing hole.

[0030] A plurality of distance sensors are arranged on the outer walls around the installation box, and the distance sensors are electrically connected to the intelligent control terminal arranged in the installation box;

[0031] The intelligent control terminal is electrically connected to the driving member of the swing mechanism.

[0032] When the present invention is actually used: the device is placed in a suitable position as a whole, and the warning words on the fixed warning plate will serve as a warning to people approaching from multiple directions. When a person approaches the warning device further, the distance sensor senses it and feeds back to the intelligent control terminal to start the drive motor. The drive motor drives the two missing gears to rotate by driving the second rotating rod. The two missing gears are alternately meshed with the driving column on both sides of the driving disk, and then drive the swing plate to swing back and forth. The swing hammer also swings at the same time to hit the bell to issue a warning sound. When the swing plate swings to one side, the clamping rod on the other side is restricted by the limit frame to press the sliding column downward. The downward movement of the sliding column drives the pull rod to pull up the support rod, and the support rod fixes the alarm The warning plate is pushed out from the inner side so that the movable side is away from the mounting plate, and the movable warning plate is unfolded at the same time, and the warning words on the movable warning plate are unfolded. When the swing plate returns to the middle position, the sliding column is lifted up by the action of the spring, and the support rod is retracted to the inner side of the mounting frame. The fixed warning plate is reset under the action of the tension spring and is close to the mounting plate again, and the movable warning plate is retracted. In the process of the overall swing of the mounting frame, the fixed warning plate drives the movable warning plate to repeat the action of unfolding and resetting, which further plays a striking warning role, especially the movable warning plate, which displays the warning slogan when unfolded and does not display it when retracted. The flashing function of the warning slogan is realized in the process of repeated unfolding action, which makes the warning effect of the warning device more significant.

[0033] When placing the device on a sloped ground, place the roller connected to one side of the counterweight block below the slope, and by shaking the handle on that side, drive the skateboard on that side to extend downward, thereby driving the roller to lift the installation box on the side below the slope to a certain height, and at the same time, the rotation of the first worm drives the second worm to rotate, and the second worm drives the second worm wheel to rotate, which in turn drives the second screw to rotate, thereby synchronously moving the counterweight block to the side with a high slope by a certain distance to balance the device, and the lifting of the lower roller and the synchronous upward movement of the counterweight block quickly stabilize the entire device on the sloped ground, and then fix the roller position with a pin, and the height of the roller above the slope can be fine-tuned by the handle according to actual conditions, further improving the convenience and accuracy of adjusting the balance of the device.

[0034] The beneficial effects of the present invention are:

[0035] 1. The present invention can swing the entire warning frame through the swing mechanism when a person approaches, and at the same time, the swing hammer hits the bell to emit a warning sound, thereby enhancing the warning effect of the warning device from the visual and auditory senses;

[0036] 2. The swing mechanism of the present invention can synchronously drive the opening and closing mechanism to reciprocate during operation, thereby realizing the function of the fixed warning plate and the movable warning plate to unfold back and forth. The unfolding and retracting process of the movable warning plate realizes the function of the warning words on it flashing repeatedly, further improving the warning effect;

[0037] 3. The present invention not only facilitates movement through the roller setting, but also adjusts the roller height so that the entire device can be stably placed on the sloped ground. At the same time, when the height of the roller located below is raised, the counterweight block can be moved upward synchronously. When used in a location with a larger slope, the roller does not need to be raised too high. The entire device can be balanced by cooperating with the configuration block, avoiding the instability caused by raising the roller too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a front view of the present invention;

[0039] Figure 2 A top view of the mounting frame of the present invention when the top is open;

[0040] Figure 3 for Figure 2 A magnified schematic diagram of area A;

[0041] Figure 4 It is a schematic diagram of the three-dimensional structure of the swing mechanism of the present invention in a stopped state;

[0042] Figure 5 for Figure 4 A magnified schematic diagram of area A;

[0043] Figure 6This is a schematic diagram of the internal three-dimensional structure of the installation box of the present invention;

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure at a first angle when the swing mechanism of the present invention is in working state;

[0045] Figure 8 It is a schematic diagram of the three-dimensional structure at a second angle when the swing mechanism of the present invention is in a working state and the top of the mounting frame is in an open state;

[0046] Fig. 9 for Figure 8 A magnified schematic diagram of area A.

[0047] Among them, the accompanying drawings are marked as follows: 1, installation box; 101, slide; 102, cover plate; 2, roller; 201, socket; 3, balancing mechanism; 301, slide plate; 302, first screw; 303, threaded sleeve; 304, fixed plate; 305, first worm gear; 306, first worm; 307, handle; 308, counterweight; 309, second screw; 310, sliding frame; 311, second worm gear; 312, second worm; 313, first transmission disc; 314, second transmission disc; 315, transmission belt; 4, warning frame; 401, fixed column; 403, installation plate; 5, fixed warning plate; 6, movable warning plate; 7, swing mechanism; 701, swing plate; 7 02. First rotating rod; 703. Driving disk; 704. Driving column; 705. Rotating seat; 706. Second rotating rod; 707. Missing gear; 708. Driving motor; 8. Opening and closing mechanism; 801. Sliding column; 802. Notch; 803. Third rotating rod; 804. Support rod; 805. Connecting plate; 806. Fourth rotating rod; 807. Groove; 808. Pull rod; 809. Connecting groove; 810. Opening; 811. Through groove; 812. Clamp rod; 813. Limiting frame; 814. Tension spring box; 815. Tension spring; 816. Opening; 817. Spring; 9. Swinging hammer; 10. Bell; 11. Latch; 12. Distance sensor; 13. Intelligent control terminal. DETAILED DESCRIPTION

[0048] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0049] See also Figures 1 to 9As shown, the present invention is a warning device for construction, including an installation box 1, two cylindrical rollers 2 are symmetrically arranged on both sides of the bottom of the installation box 1, and the two rollers 2 are connected to a balancing mechanism 3. A warning frame 4 is arranged on the top of the installation box 1, and a plurality of fixed warning plates 5 and a plurality of corresponding movable warning plates 6 are arranged on the warning frame 4, respectively. The warning frame 4 is connected to a swing mechanism 7, and an opening and closing mechanism 8 is arranged between the fixed warning plate 5 and the corresponding movable warning plate 6, and the opening and closing mechanism 8 is movably coordinated with the swing mechanism 7. A plurality of distance sensors 12 are arranged on the outer walls around the installation box 1, and the distance sensor 12 is electrically connected to an intelligent control terminal 13 arranged in the installation box 1, and the intelligent control terminal 13 is electrically connected to the driving member of the swing mechanism 7.

[0050] The installation box 1 is a rectangular structure and is arranged horizontally. The bottom of the installation box 1 is symmetrically provided with parallel slide grooves 101 on both sides of the short sides near its bottom surface. The balancing mechanism 3 includes a slide plate 301 vertically slidably connected in each slide groove 101, and the bottom of each slide plate 301 is rotatably connected to one of the rollers 2. A first screw rod 302 vertically arranged upward is fixedly connected at the center of the top of each slide plate 301. The upper side of each first screw rod 302 is coaxially sleeved in a threaded sleeve 303 and threadedly matched with the threaded sleeve 303. The bottom of each threaded sleeve 303 is rotatably connected to a fixed plate 304 horizontally arranged in the upper installation box 1. The fixed plate 304 is provided with a through hole matched with the inner diameter of the threaded sleeve 303. A first worm gear 305 is coaxially sleeved on the outer side of each threaded sleeve 303. Each first worm gear 305 is meshed with a first worm 306. Each first worm 306 is rotatably connected to the installation box 1 and one end thereof passes through the outer side of the installation box 1 and is fixedly connected to the handle 307. The balancing mechanism 3 includes a counterweight block 308 slidably connected to the inner side of the bottom surface of the installation box 1, and a threaded hole is provided at the center of the counterweight block 308, and a second screw 309 is threadedly connected to the threaded hole, and both ends of the second screw 309 are rotatably connected to both sides of the sliding frame 310. A second worm gear 311 is coaxially sleeved on the outside of one side of the second screw 309, and the second worm gear 311 is meshed with the second worm 312. Both ends of the second worm 312 are rotatably connected to the sliding frame 310, and a first transmission disk 313 is coaxially sleeved on one side of the second worm 312, wherein the first worm 306 close to the side of the second worm 312 is coaxially sleeved on the second transmission disk 314, and a transmission belt 315 is sleeved between the first transmission disk 313 and the second transmission disk 314. A plurality of insertion holes 201 are evenly arranged along the circumferential direction on both sides of each roller 2. A fixing hole is opened at the bottom of the slide plate 301 corresponding to the insertion hole 201. A latch 11 is movably fitted between the insertion hole 201 and the corresponding fixing hole.

[0051] The top of the installation box 1 is an open structure, a cover plate 102 is arranged above the balancing mechanism 3, the swing mechanism 7 includes a swing plate 701 arranged above the cover plate 102, a first rotating rod 702 is penetrated in the center of the swing plate 701, both ends of the first rotating rod 702 are rotatably connected to both sides of the top opening of the installation box 1 and extend to the outside of the installation box 1, one end of the first rotating rod 702 is coaxially fixedly connected to a driving disk 703, and the driving disk 703 is fixedly connected uniformly along the circumferential direction near the edge of the side away from the installation box 1 A plurality of driving posts 704 are perpendicular to the surface of the driving disk 703. A second rotating rod 706 is rotatably connected to the rotating seat 705 near the side of the driving disk 703 away from the installation box 1. Two missing gears 707 are coaxially sleeved on the outer side of the second rotating rod 706 corresponding to the left and right sides of the driving disk 703. The gear blocks of the two missing gears 707 are arranged in opposite directions. The two missing gears 707 are meshed with the driving posts 704. The second rotating rod 706 is coaxially fixedly connected with the output end of the driving motor 708. The end of the first rotating rod 702 away from the driving disk 703 is rotatably connected to one end of the handle of the swing hammer 9. Bells 10 are symmetrically arranged on both sides of the hammer head of the swing hammer 9.

[0052] The warning frame 4 includes a fixed column 401 fixedly connected to the hollow structure at the top center of the swing plate 701, the upper side of the fixed column 401 is sleeved on the inner center part of the mounting frame, the mounting frame is a closed structure with three rectangular mounting plates 403 connected in end to end sequence, the cross-sectional shape of the mounting frame is an equilateral triangle, the top of the mounting frame is a closed structure, one lateral edge of the outer wall of each mounting plate 403 is hinged to one side edge of a fixed warning plate 5, one side edge of each fixed warning plate 5 away from its hinged end is fixedly connected to one side edge of a movable warning plate 6, one side edge of each movable warning plate 6 away from the fixed warning plate 5 to which it is connected is fixedly connected to the other side edge of the mounting plate 403, and the movable warning plate 6 is made of a foldable and retractable flexible material.

[0053] The opening and closing mechanism 8 includes a sliding column 801 coaxially slidably connected to the inner side of the fixed column 401, and three through slots 802 are opened on the top of the fixed column 401 from top to bottom corresponding to the three fixed warning plates 5. A third rotating rod 803 is fixedly connected between the two sides of each slot 802, and each third rotating rod 803 is internally rotatably connected to one side of a support rod 804. Each support rod 804 is located on the inner side of the fixed column 401 at one end close to the third rotating rod 803, and a connecting plate 805 perpendicular to it is fixedly connected at its bottom, and a third rotating rod 803 is fixedly connected to the end of the connecting plate 805 away from the support rod 804. There are four rotating rods 806, and three connecting plates 805 corresponding to the top of the sliding column 801 are all provided with three grooves 807 from top to bottom. A pull rod 808 is arranged in each groove 807. The top of each pull rod 808 is rotatably connected to its corresponding fourth rotating rod 806, and the bottom end is slidably connected to the connecting groove 809 radially arranged at the bottom of the groove 807 along the sliding column 801. Corresponding to each support rod 804, a through opening 810 is opened on each mounting plate 403, and the end of the support rod 804 away from the third rotating rod 803 is movably matched with the fixed warning plate 5 on the same side through the opening 810. Two through grooves 811 are symmetrically provided along the axial direction on both sides near the bottom of the fixed column 401, and a clamping rod 812 extending to the outside of the through groove 811 on the same side is symmetrically fixedly connected along the radial direction on both sides of the bottom of the sliding column 801, and a spring 817 is fixedly connected between the bottom of the sliding column 801 and the bottom of the fixed column 401, and corresponding to the two clamping rods 812, limit frames 813 are set on both sides of the top of the installation box 1, and each clamping rod 812 is engaged with the limit frame 813 on the corresponding side, and a tension spring box 814 is set on the inner side of each mounting plate 403, and the inner end of each tension spring box 814 is fixedly connected to one end of a tension spring 815, and the other end of the tension spring 815 passes through the opening 816 opened in the mounting plate 403 and is fixedly connected to the inner side of the corresponding fixed warning plate 5.

[0054] When the present invention is actually used: the device is placed in a suitable position as a whole, and the warning words on the fixed warning plate 5 will serve as a warning to people approaching from multiple directions. When a person approaches the warning device further, the distance sensor 12 senses it and feeds back to the intelligent control terminal 13 to start the drive motor 708. The drive motor 708 drives the two missing gears 707 to rotate by driving the second rotating rod 706. The two missing gears 707 alternately engage with the driving column 704 on both sides of the driving disk 703, and then drive the swing plate 701 to swing back and forth. The swing plate 701 drives the warning frame 4 to swing back and forth, and the swing hammer 9 also swings at the same time to hit the bell 10 to emit a warning sound. When the swing plate 701 swings to one side, the card rod 812 on the other side is restricted by the limit frame 813, which produces the effect of pressing the slide 801 downward, and the sliding column 801 runs downward to drive the pull rod 8 08 Pull up the support rod 804, which pushes the fixed warning plate 5 out from the inner side so that the movable side is away from the mounting plate 403, and at the same time unfolds the movable warning plate 6, and the warning words on the movable warning plate 6 are unfolded. When the swing plate 701 returns to the middle position, the sliding column 801 is pushed up by the spring 817, and the support rod 804 is retracted to the inner side of the mounting frame. The fixed warning plate 5 is reset under the action of the tension spring 815 and is close to the mounting plate 403 again, and the movable warning plate 6 is retracted. In the process of the overall swinging of the warning frame 4, the fixed warning plate 5 drives the movable warning plate 6 to repeat the action of unfolding and resetting, which further plays a striking warning role, especially the movable warning plate 6, which displays the warning slogan when unfolded and does not display it when retracted. In the process of repeated unfolding action, the flashing function of the warning slogan is realized, making the warning effect of the warning device more significant.

[0055] When placing the device on a sloped ground, the roller 2 connected to one side of the counterweight 308 is placed below the slope, and the handle 307 on that side is driven to extend downward to drive the roller 2 to lift the installation box on the side below the slope to a certain height, and at the same time, the second worm 312 is driven to rotate by the rotation of the first worm 306, and the second worm 312 drives the second worm wheel 311 to rotate, and then drives the second screw 309 to rotate, thereby synchronously moving the counterweight 308 to the side with a high slope by a certain distance to balance the device, and the device is quickly stabilized on the sloped ground by the lifting of the lower roller 2 and the synchronous upward movement of the counterweight 308, and then the position of the roller 2 is fixed by the pin 11, and the height of the roller 2 above the slope can be fine-tuned by the handle 307 according to actual conditions, further improving the convenience and accuracy of adjusting the balance of the device.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A warning device for construction, characterized in that: It includes an installation box (1), the installation Two cylindrical rollers (2) are symmetrically arranged on both sides of the bottom of the box (1), and both rollers (2) are connected to a balancing mechanism (3); A warning frame (4) is arranged on the top of the installation box (1), and a plurality of fixed warning plates (5) and a plurality of corresponding movable warning plates (6) are arranged on the warning frame (4); The warning frame (4) is connected to a swing mechanism (7), an opening and closing mechanism (8) is provided between the fixed warning plate (5) and the corresponding movable warning plate (6), and the opening and closing mechanism (8) is movably coordinated with the swing mechanism (7); The installation box (1) is of a rectangular structure and is arranged horizontally, and the bottom of the installation box (1) is provided with symmetrically parallel sliding grooves (101) on both sides of the short sides close to the bottom surface thereof; The balancing mechanism (3) comprises a slide plate (301) vertically slidably connected in each of the slide grooves (101); the bottom of each of the slide plates (301) is rotatably connected to one of the rollers (2); a first screw rod (302) vertically arranged upward is fixedly connected at the center of the top of each of the slide plates (301); the upper side of each of the first screw rods (302) is coaxially sleeved in a threaded sleeve (303) and threadedly matched with the threaded sleeve (303); the bottom of each of the threaded sleeves (303) is rotatably connected to a fixed plate (304) horizontally arranged in the upper installation box (1); the fixed plate (304) is provided with a through hole matched with the inner diameter of the threaded sleeve (303); A first worm wheel (305) is coaxially sleeved on the outside of each threaded sleeve (303), each first worm wheel (305) is meshed with a first worm (306), each first worm (306) is rotatably connected to the installation box (1) and one end thereof passes through the outside of the installation box (1) and is fixedly connected to a handle (307); The balancing mechanism (3) comprises a counterweight (308) slidably connected to the inner side of the bottom surface of the installation box (1); a threaded hole is provided at the center of the counterweight (308); a second screw rod (309) is threadedly connected to the threaded hole; two ends of the second screw rod (309) are rotatably connected to two sides of the sliding frame (310); A second worm wheel (311) is coaxially sleeved on one side of the second screw (309), the second worm wheel (311) is meshed with the second worm (312), both ends of the second worm (312) are rotatably connected to the sliding frame (310), a first transmission disk (313) is coaxially sleeved on one side of the second worm (312), a second transmission disk (314) is coaxially sleeved on the first worm (306) near the second worm (312), and a transmission belt (315) is sleeved between the first transmission disk (313) and the second transmission disk (314); The top of the installation box (1) is an open structure, and a cover plate (102) is provided above the balancing mechanism (3); The swing mechanism (7) comprises a swing plate (701) arranged above the cover plate (102); a first rotating rod (702) is passed through the center of the swing plate (701); two ends of the first rotating rod (702) are rotatably connected to two sides of the top opening of the installation box (1) and extend to the outside of the installation box (1); one end of the first rotating rod (702) is coaxially fixedly connected to a driving disk (703); a plurality of driving columns (704) are evenly fixedly connected to the side of the driving disk (703) away from the installation box (1) near its edge along the circumferential direction and are perpendicular to the disk surface of the driving disk (703); A second rotating rod (706) rotatably connected to a rotating seat (705) is arranged near the driving disk (703) and away from the installation box (1); two missing gears (707) are coaxially sleeved on the outer side of the second rotating rod (706) corresponding to the left and right sides of the driving disk (703); the tooth blocks of the two missing gears (707) are arranged in opposite directions to each other, and the two missing gears (707) are meshed with the driving column (704); The second rotating rod (706) is coaxially and fixedly connected to the output end of the driving motor (708).

2. The warning device for construction according to claim 1, characterized in that: The warning frame (4) comprises a fixing column (401) fixedly connected to a hollow structure at the center of the top of the swing plate (701); the upper side of the fixing column (401) is sleeved on the inner center of the mounting frame; the mounting frame is a closed structure in which three rectangular mounting plates (403) are connected end to end; the cross-section of the mounting frame is an equilateral triangle; and the top of the mounting frame is a closed structure; One lateral edge of the outer wall of each mounting plate (403) is hinged to one side edge of a fixed warning plate (5); one side edge of each fixed warning plate (5) away from its hinged end is fixedly connected to one side edge of a movable warning plate (6); one side edge of each movable warning plate (6) away from the fixed warning plate (5) to which it is connected is fixedly connected to the other side edge of the mounting plate (403); The movable warning plate (6) is made of a foldable and retractable flexible material.

3. The warning device for construction according to claim 2, characterized in that: The opening and closing mechanism (8) comprises a sliding column (801) coaxially slidably connected to the inner side of the fixed column (401); The top of the fixed column (401) is provided with three through slots (802) corresponding to the three fixed warning plates (5) from top to bottom, and a third rotating rod (803) is fixedly connected between the two sides of each slot (802), and each third rotating rod (803) is internally rotatably connected to one side of a support rod (804), and one end of each support rod (804) close to the third rotating rod (803) is located on the inner side of the fixed column (401) and a connecting plate (805) perpendicular to the supporting rod (804) is fixedly connected at its bottom, and one end of the connecting plate (805) away from the supporting rod (804) is fixedly connected to a fourth rotating rod (806); The top of the sliding column (801) corresponds to the three connecting plates (805), and three grooves (807) are provided from top to bottom. A pull rod (808) is provided in each of the grooves (807). The top of each pull rod (808) is rotatably connected to the corresponding fourth rotating rod (806), and the bottom end is slidably connected to a connecting groove (809) provided along the radial direction of the sliding column (801) at the bottom of the groove (807); Corresponding to each of the support rods (804), each of the mounting plates (403) is provided with a through opening (810), and one end of the support rod (804) away from the third rotating rod (803) is movably matched with the fixed warning plate (5) located on the same side through the opening (810).

4. The warning device for construction according to claim 3, characterized in that: The fixed column (401) is provided with two through slots (811) symmetrically along its axial direction on both sides near the bottom, and the bottom of the sliding column (801) is symmetrically and fixedly connected with a clamping rod (812) extending to the outside of the through slot (811) on the same side on both sides along its radial direction, and a spring (817) is fixedly connected between the bottom of the sliding column (801) and the bottom of the fixed column (401); Corresponding to the two clamping rods (812), limit frames (813) are arranged on both sides of the top of the installation box (1), and each clamping rod (812) is clamped and matched with the limit frame (813) on the corresponding side; A tension spring box (814) is provided on the inner side of each mounting plate (403), and the inner end of each tension spring box (814) is fixedly connected to one end of a tension spring (815), and the other end of the tension spring (815) passes through an opening (816) provided in the mounting plate (403) and is fixedly connected to the inner side of the corresponding fixed warning plate (5).

5. The warning device for construction according to claim 1, characterized in that: One end of the first rotating rod (702) away from the driving disc (703) is rotatably connected to one end of the handle of the swing hammer (9), and bells (10) are symmetrically arranged on both sides of the hammer head of the swing hammer (9).

6. The warning device for construction according to claim 1, characterized in that: A plurality of insertion holes (201) are evenly arranged along the circumferential direction on both sides of each roller (2), a fixing hole is opened at the bottom of the slide plate (301) corresponding to the insertion hole (201), and a latch (11) is movably engaged between the insertion hole (201) and the corresponding fixing hole.

7. The warning device for construction according to claim 1, characterized in that: A plurality of distance sensors (12) are arranged on the outer walls of the installation box (1), and the distance sensors (12) are electrically connected to an intelligent control terminal (13) arranged in the installation box (1); The intelligent control terminal (13) is electrically connected to a driving component of the swing mechanism (7).

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