Steel reinforced concrete floor steel bar positioning semi-automatic line drawing device

Abstract

The application relates to the floor marking technical field, in particular to a steel structure concrete floor steel bar positioning semi-automatic marking device, which comprises a supporting rod, the top of the supporting rod is fixedly provided with a transverse track, the transverse track and the supporting rod are vertically arranged, the inner side of the transverse track is slidably connected with a sliding block connected along the transverse track, and the outer side of the sliding block is fixedly provided with a sliding frame. The first motor is started to drive the driving wheel body to rotate and rub the transverse track, the sliding frame on the outer side of the top disc slides on the transverse track, the paint box can be driven to displace, the distance between the moving wheel body and the shielding plate is detected by the laser ranging sensor, the distance traveled by the moving wheel body can be detected, the moving distance of the spraying mechanism can be adjusted according to the requirement, the problem that the detection precision is limited due to the direct movement on the floor and the line drawing deviation is caused can be avoided.

Description

Technical Field

[0001] This application relates to the field of floor slab marking technology, and in particular to a semi-automatic marking device for positioning steel reinforcement in steel structure concrete floor slabs. Background Technology

[0002] A floor slab is a horizontal structure connecting floors within a building, typically made of concrete, reinforced concrete, wood, or other materials. The primary function of a floor slab is to bear the loads of the floors, and it can also serve as a sound and heat insulation layer. Depending on the building design and intended use, the form and materials of floor slabs vary, such as load-bearing floor slabs, hollow core slabs, and cantilever slabs. Floor slab construction must strictly adhere to design requirements to ensure the safety and stability of the building.

[0003] Currently, steel-reinforced concrete floor slabs are a structural form where concrete is poured onto steel beams to form a floor slab. They possess high strength and rigidity, enabling them to withstand significant loads. A search reveals Chinese Patent Publication No. CN218375382U, which discloses a semi-automatic marking device for floor slab rebar positioning. This device includes a display fixedly mounted at one end of a push rod; a trolley housing fixedly attached to the upper surface of a trolley battery; and a cleaning block inserted into a groove located inside the trolley housing. The beneficial effects are: the wheel axle, located on the rear side of the shelf, has a circumference of 10mm (a multiple of the rebar spacing for easy counting); one side of the wheel is connected to the encoder shaft; the encoder is connected to the display via a connecting cable; the number of encoder rotations is preset using adjustment buttons on the display; when the wheel reaches the set value, the encoder releases an instantaneous electrical signal, which is transmitted to the display. The display then controls a painting device to spray paint through the paint nozzle, achieving the desired rebar spacing. At this point, the counter resets to zero and restarts counting. Regarding the aforementioned related technology, the inventors have discovered the following drawbacks:

[0004] The aforementioned equipment uses a trolley to travel on the floor slab for line marking adjustment. However, its main detection method relies on the number of rotations of the trolley's wheel axles. During floor slab inspection, the top of the floor slab is relatively rough. If there are potholes, the trolley needs to travel for a long time to assist in the inspection, and it is also easy for the trolley to deviate from its course. Therefore, the above detection method has certain shortcomings and is prone to line marking deviations, so it needs to be improved. Summary of the Invention

[0005] To improve the accuracy of line marking, this application provides a semi-automatic line marking device for positioning steel reinforcement in steel structure concrete floor slabs.

[0006] This application provides a semi-automatic marking device for positioning steel reinforcement in steel structure concrete floor slabs, employing the following technical solution: It includes a support rod, a transverse rail fixedly mounted on the top of the support rod, the transverse rail and the support rod being perpendicularly arranged; a slider slidably connected to the inner side of the transverse rail, sliding along the transverse rail; a sliding frame fixedly mounted on the outer side of the slider, the sliding frame slidably connected to the outer side of the transverse rail; a driving mechanism fixedly mounted on the upper end of the sliding frame, the bottom of the driving mechanism being in contact with the top of the transverse rail; a paint tank fixedly mounted on the bottom of the slider; a spraying mechanism fixedly mounted on one side of the paint tank; cleaning mechanisms fixedly mounted on both sides of the spraying mechanism; a baffle plate fixedly mounted on the top of the transverse rail away from the support rod; a laser rangefinder sensor for detecting length fixedly mounted on the top of the driving mechanism; and a controller fixedly mounted on the upper front of the support rod, with a control module located inside the controller.

[0007] Optionally, the drive mechanism includes a top plate, which is fixedly installed on both sides of the upper end of the sliding frame. A first motor is fixedly installed on the front of the top plate. The output end of the first motor passes through the sliding frame and the top plate and is fixedly installed with a drive wheel. The bottom of the drive wheel is in contact with the top of the transverse track. By setting the drive mechanism, during use, the first motor can be started to drive the drive wheel to rotate. The drive wheel rubs against the transverse track, thereby driving the slide to move. This facilitates the adjustment of the paint tank and the laser rangefinder sensor. The laser rangefinder sensor detects the distance between the paint tank and the shielding plate, thereby enabling the device to accurately detect and measure the line drawing, improving the line drawing accuracy. Several anti-slip rubber strips are fixedly connected in a circular pattern at equal intervals on the outer surface of the drive wheel. The anti-slip rubber strips at the bottom are in contact with the top of the transverse track. By setting the anti-slip rubber strips, the friction of the outer surface of the drive wheel can be increased during use, thereby improving the stability of the drive wheel driving the slide to slide.

[0008] Optionally, a feeding pipe is fixedly installed on the upper front of the paint tank, and a sealing cap is threadedly connected to the top of the feeding pipe. The feeding pipe and the sealing cap are designed to work together so that the top of the feeding pipe can be opened by twisting the sealing cap during use, making it easy to quickly add paint into the paint tank and facilitating the operation of the device.

[0009] Optionally, the driving mechanism further includes a concave bracket, the two ends of which are fixedly connected to the top of the top plate. The laser rangefinder is fixedly installed on the inner side of the concave bracket, and the laser detection end of the laser rangefinder is positioned facing the shield. By setting the concave bracket, the device can slide the sliding frame via the drive wheel during use, which in turn can assist in moving the laser rangefinder. The movement of the laser rangefinder can adjust the distance between it and the shield. At this time, the distance of the shield is detected by the laser rangefinder, which facilitates the device to quickly and accurately detect the line marking data. The use of a laser rangefinder can improve the detection accuracy.

[0010] Optionally, the cleaning mechanism includes a mounting ring frame, which is fixedly installed on the side of the connecting frame away from the rear track. A drive assembly is fixedly installed on the top of the mounting ring frame, and a cleaning disc is fixedly installed through the bottom output end of the drive assembly. Cleaning brushes are fixedly installed at equal intervals on the bottom of the cleaning disc. By setting up the cleaning mechanism, during use, the device can be started by activating the drive assembly, which can drive the two sets of cleaning discs to rotate. The rotation of the two sets of cleaning discs can assist in driving the cleaning discs to scrape and clean the ground, making the overall cleaning of the device more convenient.

[0011] Optionally, the controller has a display screen on the upper front and a crossbar is fixedly installed on the lower back of the support rod. By setting the display screen, the distance detected by the laser rangefinder can be detected by the display screen during the detection process. The crossbar can help support the device. With the cooperation of the crossbar and the support rod, the device can be attached to the edge of the floor slab for easy and quick line drawing and measurement.

[0012] Optionally, the spraying mechanism includes a rear rail, which is fixedly installed in the middle of the back of the paint tank. A second motor is fixedly installed at the top of the rear rail, and a drive screw is fixedly installed through the bottom output end of the second motor through the rear rail. A displacement rod that slides along the extension direction of the rear rail is threaded onto the outer surface of the drive screw. A connecting frame is fixedly installed at the bottom of the displacement rod, and an electric spray gun is fixedly installed at the top of the connecting frame. The bottom of the electric spray gun passes through the connecting frame, and the top input end of the electric spray gun is connected to the bottom of the paint tank through a hose. By setting up the spraying mechanism, during use, the second motor can be started, which drives the drive screw to slide the displacement rod inside the rear rail, thus assisting in the up-and-down movement of the displacement rod. The displacement rod drives the connecting frame to move down, which in turn drives the electric spray gun to contact the ground. At this time, the electric spray gun can be started for spraying, which facilitates rapid spraying and avoids damage to the equipment caused by collisions with the electric spray gun.

[0013] Optionally, the drive assembly includes a transmission pulley and a fixed frame. The fixed frame is fixedly installed on one side of the top of the mounting ring frame. The transmission pulley is rotatably connected to both ends of the top of the mounting ring frame. A third motor for driving the transmission pulley is fixedly installed on the top of the fixed frame. The output end of the third motor passes through the fixed frame and is fixedly connected to the top of the transmission pulley. The transmission pulleys are connected by a transmission belt. By setting the drive assembly, during use, the device can drive the transmission pulley to rotate by starting the third motor. The rotation of the transmission pulley drives another set of transmission pulleys to rotate via the transmission belt, thereby synchronously driving the two sets of cleaning discs to rotate. The cleaning brush at the bottom of the cleaning discs can clean the ground, improve the overall line drawing accuracy of the device, and prevent the line from falling off after drawing.

[0014] Optionally, four sets of transmission guide wheels are fixedly installed at the top center of the mounting ring frame. The transmission guide wheels are connected to the transmission belt. By setting four sets of transmission pulleys, the shape of the transmission belt can be changed through the transmission pulleys to avoid the transmission belt affecting the movement of the displacement rod.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] 1. By starting the first motor, the drive wheel rotates and rubs against the transverse track, causing the sliding frame on the outer side of the top plate to slide on the transverse track, which in turn moves the paint tank. The distance between the moving wheel and the baffle is detected by a laser rangefinder, and the distance traveled by the moving wheel can be measured. Thus, the distance the paint tank moves can be detected. The movement of the spraying mechanism can be adjusted as needed, thus avoiding the problem of limited detection accuracy and deviation in the drawing caused by moving directly on the floor.

[0017] 2. After the paint tank moves to the set distance, the second motor is started to drive the lead screw to rotate. The lead screw drives the displacement rod inside the track to slide downward. The downward movement of the displacement rod can drive the connecting frame to move down. The downward movement of the connecting frame can make the electric spray gun contact the floor slab. At this time, the electric spray gun is started to spray and draw lines on the floor slab, making the whole device able to draw lines and operate semi-automatically. At the same time, the line drawing can be performed by a single person, simplifying the line drawing work on the top of the floor slab, improving work efficiency, and reducing the need for manpower.

[0018] 3. When the cleaning disc contacts the ground, the third motor drives both sets of transmission pulleys to rotate. The rotation of the two sets of transmission pulleys assists in driving the rotation of the two sets of cleaning discs. The rotation of the cleaning discs drives the cleaning brushes to rotate, and the cleaning brushes scrape and clean the ground, achieving a good cleaning effect. This allows the equipment to pre-clean and scrape the top of the floor slab during use, preventing dust and sand from obstructing the marking during the marking process, thus improving the marking accuracy and the stability of the marking paint spraying. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0020] Figure 2 This is a rear-view structural schematic diagram of an embodiment of this application;

[0021] Figure 3 This is a top view of the structure in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the cleaning mechanism in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the spraying mechanism in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the cleaning mechanism viewed from below in an embodiment of this application;

[0025] Figure 7 This is an embodiment of the present application. Figure 3 Enlarged structural diagram at point A;

[0026] Figure 8 This is a schematic diagram of the electronic component circuit connection in the embodiments of this application.

[0027] Reference numerals: 1. Support rod; 2. Transverse track; 3. Slider; 4. Sliding frame; 5. Drive mechanism; 51. Top plate; 52. First motor; 53. Drive wheel; 54. Anti-slip strip; 55. Concave bracket; 6. Paint tank; 7. Spraying mechanism; 71. Rear track; 72. Second motor; 73. Lead screw; 74. Connecting frame; 75. Electric spray gun; 76. Displacement rod; 8. Cleaning mechanism; 81. Mounting ring frame; 82. Drive assembly; 821. Transmission pulley; 822. Fixing frame; 823. Third motor; 824. Transmission guide wheel; 83. Cleaning disc; 84. Cleaning brush; 9. Baffle plate; 10. Laser rangefinder sensor; 11. Controller; 12. Feeding pipe; 13. Sealing cap; 14. Display screen; 15. Crossbar. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0029] This application discloses a semi-automatic marking device for positioning reinforcing bars in steel structure concrete floor slabs. For example... Figure 1 As shown, it includes a support rod 1, a transverse rail 2 is fixedly installed on the top of the support rod 1, the transverse rail 2 and the support rod 1 are arranged perpendicularly, a slider 3 is slidably connected to the inner side of the transverse rail 2, a sliding frame 4 is fixedly installed on the outer side of the slider 3, the sliding frame 4 is slidably connected to the outer side of the transverse guide rail, and a drive mechanism 5 is fixedly installed at the upper end of the sliding frame 4, the drive mechanism 5 includes a top plate 51;

[0030] The bottom of the drive mechanism 5 is fitted and connected to the top of the transverse track 2. A paint box 6 is fixedly installed at the bottom of the slider 3. A spraying mechanism 7 is fixedly installed on one side of the paint box 6. A cleaning mechanism 8 is fixedly installed on both sides of the spraying mechanism 7. The cleaning mechanism 8 includes a mounting ring frame 81. A baffle plate 9 is fixedly installed at the top of the transverse track 2 away from the support rod 1.

[0031] A laser rangefinder 10 for length detection is fixedly mounted on the top of the drive mechanism 5, and a controller 11 is fixedly mounted on the upper front of the support rod 1. A control module is located inside the controller 11. Using the laser rangefinder 10 allows for more intuitive and accurate measurement, thus improving the detection effect.

[0032] Please refer to Figures 1-5 A feeding pipe 12 is fixedly installed on the upper front of the paint tank 6. A sealing cap 13 is threadedly connected to the top of the feeding pipe 12. The feeding pipe 12 and the sealing cap 13 are designed to work together so that the top of the feeding pipe 12 can be opened by twisting the sealing cap 13 during use, which facilitates the quick addition of paint into the paint tank 6 and makes the operation of the device convenient.

[0033] Please refer to Figures 1-3 and Figure 7 The top plate 51 is fixedly installed on both sides of the upper end of the sliding frame 4. A first motor 52 is fixedly installed on the front of the top plate 51. The output end of the first motor 52 passes through the sliding frame 4 and the top plate 51 and is fixedly installed with a drive wheel 53. The bottom of the drive wheel 53 is in contact with the top of the transverse track 2. By setting the drive mechanism 5, the device can drive the drive wheel 53 to rotate by starting the first motor 52 during use. The drive wheel 53 rotates and rubs against the top of the transverse track 2, thereby assisting in driving the sliding frame 4 to move.

[0034] By using the sliding frame 4 to move, the paint tank 6 can be moved laterally. Through the lateral movement of the paint tank 6, linear lateral lines can be drawn. Several anti-slip rubber strips 54 are fixedly connected in a circular pattern at equal intervals on the outer surface of the drive wheel 53. The anti-slip rubber strips 54 at the bottom are attached to the top of the lateral track 2. By setting the anti-slip rubber strips 54, the friction of the outer surface of the drive wheel 53 can be increased during use, thereby improving the stability of the drive wheel 53 in driving the sliding frame.

[0035] Please refer to Figures 1-6 The mounting ring frame 81 is fixedly installed on the side of the connecting frame 74 away from the rear track 71. The top of the mounting ring frame 81 is fixedly installed with a drive assembly 82. The bottom output end of the drive assembly 82 passes through the mounting ring frame 81 and is fixedly installed with a cleaning disc 83. Cleaning brushes 84 are fixedly installed at equal intervals at the bottom of the cleaning disc 83. By setting the cleaning mechanism 8, the device can be operated by starting the drive assembly 82 during use.

[0036] The two sets of cleaning discs 83 can be rotated by the drive component 82. The rotation of the two sets of cleaning discs 83 can help drive the cleaning discs 83 to scrape and clean the ground, making the overall cleaning of this device more convenient. The drive mechanism 5 also includes a concave bracket 55. The two ends of the concave bracket 55 are fixedly connected to the top of the top plate 51. The laser range sensor 10 is fixedly installed on the inner side of the concave bracket 55. The laser detection end of the laser range sensor 10 is set facing the shield 9.

[0037] By setting a concave bracket 55, the device can drive the sliding frame 4 to slide via the drive wheel 53 during use. This can assist in moving the laser rangefinder 10. The movement of the laser rangefinder 10 can adjust the distance between it and the shield 9. The distance between the laser rangefinder 10 and the shield 9 can be detected by the laser rangefinder 10, which facilitates the device to quickly and accurately detect the line marking data. The use of the laser rangefinder 10 can improve the detection accuracy.

[0038] Please refer to Figures 1-6 The spraying mechanism 7 includes a rear rail 71, which is fixedly installed in the middle of the back of the paint box 6. A second motor 72 is fixedly installed on the top of the rear rail 71. A lead screw 73 for driving is fixedly installed through the bottom output end of the second motor 72 through the rear rail 71. A displacement rod 76 that slides along the extension direction of the rear rail 71 is threadedly connected to the outer surface of the lead screw 73.

[0039] A connecting frame 74 is fixedly installed at the bottom of the displacement rod 76, and an electric spray gun 75 is fixedly installed at the top of the connecting frame 74. The bottom of the electric spray gun 75 passes through the connecting frame 74, and the top input end of the electric spray gun 75 is connected to the bottom of the paint tank 6 through a hose. By setting up the spraying mechanism 7, the equipment can be operated by starting the second motor 72. The second motor 72 drives the lead screw 73 to drive the displacement rod 76 to slide inside the rear track 71, which can assist in moving the displacement rod 76 up and down. The displacement rod 76 drives the connecting frame 74 to move down, which can drive the electric spray gun 75 to contact the ground. At this time, the electric spray gun 75 can be started to spray, which facilitates the rapid spraying of the equipment and avoids the electric spray gun 75 from being damaged by collision.

[0040] Please refer to Figures 1-6 The controller 11 has a display screen 14 on the upper front and a crossbar 15 fixedly installed on the lower back of the support rod 1. By setting the display screen 14, the distance detected by the laser rangefinder 10 can be detected through the display screen 14 during the detection process.

[0041] The crossbar 15 is provided to assist in supporting the device. Through the cooperation of the crossbar 15 and the support rod 1, the device can be attached to the edge of the floor slab, which facilitates quick line drawing and measurement. Four sets of transmission guide wheels 824 are fixedly installed at the top center of the mounting ring 81. The transmission guide wheels 824 are connected to the transmission belt. By setting four sets of transmission pulleys 821, the shape of the transmission belt can be changed through the transmission pulleys 821 to avoid the transmission belt affecting the movement of the displacement rod 76.

[0042] Please refer to Figures 1-6 The drive assembly 82 includes a drive pulley 821 and a fixed frame 822. The fixed frame 822 is fixedly installed on the top side of the mounting ring frame 81. The drive pulley 821 is rotatably connected to both ends of the top of the mounting ring frame 81. A third motor 823 for driving the drive pulley 821 is fixedly installed on the top of the fixed frame 822. The output end of the third motor 823 passes through the top of the fixed frame 822 and the drive pulley 821 and is fixedly connected. The drive pulleys 821 are connected to each other by a drive belt.

[0043] By setting the drive component 82, during the use of this device, the third motor 823 can be started to drive the transmission pulley 821 to rotate. The rotation of the transmission pulley 821 can drive another set of transmission pulleys 821 to rotate through the transmission belt, thereby synchronously driving the two sets of cleaning discs 83 to rotate. The cleaning brush at the bottom of the cleaning disc 83 can clean the ground, improve the overall line drawing accuracy of this device, and prevent the line from falling off after drawing.

[0044] The implementation principle of the semi-automatic marking device for positioning steel reinforcement in a steel structure concrete floor slab according to an embodiment of this application is as follows: The first motor 52 is started to drive the drive wheel 53 to rotate. Since the anti-slip rubber strip 54 on the outer surface of the drive wheel 53 is in contact with the transverse track 2, the rotation of the drive wheel 53 rubs against the transverse track 2, causing the sliding frame 4 on the outer side of the top plate 51 to slide on the transverse track 2. The sliding frame 4 assists in driving the slider 3 to slide on the inner side of the transverse track 2. The sliding of the slider 3 causes the paint tank 6 to move. At this time, the distance between the moving wheel and the baffle plate 9 is detected by the laser range sensor 10, thereby measuring the displacement. The distance traveled by the driving wheel body allows for the detection of the movement distance of the paint tank 6. The movement of the spraying mechanism 7 can be adjusted as needed. During operation, the support rod 1 and crossbar 15 abut against the side of the floor slab, ensuring a stable and perpendicular fit between them. This keeps the transverse track 2 parallel to the floor slab, preventing limited detection accuracy and line deviation caused by direct movement on the floor slab. When the driving wheel body 53 drives the slider 3 to move the paint tank 6, the second motor 72 can be activated to drive the displacement rod 76 to move the mounting ring frame 81 downwards, causing the bottom of the mounting ring frame 81 to... When the cleaning disc 83 contacts the ground, the third motor 823 drives the transmission pulley 821 to rotate. This rotation, via a transmission belt, synchronously drives both sets of transmission pulleys 821 to rotate, thus assisting in the rotation of the two cleaning discs 83. The rotation of the cleaning discs 83 then drives the cleaning brushes 84 to rotate, which in turn scrapes and cleans the ground, achieving a good cleaning effect. This allows the equipment to pre-clean and scrape the top of the floor slab before use, preventing dust and sand from obstructing the marking process and improving the marking efficiency. The improved line accuracy enhances the stability of the marking paint spraying process. After the paint tank 6 moves to the set distance, the second motor 72 drives the lead screw 73 to rotate. The lead screw 73 drives the displacement rod 76 on the inner side of the rear track 71 to slide downwards. The downward movement of the displacement rod 76 causes the connecting frame 74 to move downwards, which in turn causes the electric spray gun 75 to contact the floor slab. At this point, the electric spray gun 75 is started to spray and mark lines on the floor slab. This makes the entire device capable of marking lines and semi-automatic operation. Line marking can be performed by a single person, simplifying the marking work on the top of the floor slab, improving work efficiency, and reducing labor requirements.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A semi-automatic marking device for positioning steel reinforcement in steel-structured concrete floor slabs, comprising a support rod (1), characterized in that: A transverse rail (2) is fixedly installed on the top of the support rod (1). The transverse rail (2) and the support rod (1) are arranged perpendicularly. A slider (3) is slidably connected to the inner side of the transverse rail (2) along the transverse rail (2). A sliding frame (4) is fixedly installed on the outer side of the slider (3). The sliding frame (4) is slidably connected to the outer side of the transverse guide rail. A drive mechanism (5) is fixedly installed on the upper end of the sliding frame (4). The bottom of the drive mechanism (5) is fitted and connected to the top of the transverse rail (2). The slider... (3) A paint tank (6) is fixedly installed at the bottom. A spraying mechanism (7) is fixedly installed on one side of the paint tank (6). A cleaning mechanism (8) is fixedly installed on both sides of the spraying mechanism (7). A baffle plate (9) is fixedly installed at the top of the transverse track (2) away from the support rod (1). A laser rangefinder (10) for detecting length is fixedly installed on the top of the drive mechanism (5). A controller (11) is fixedly installed on the upper front of the support rod (1). A control module is provided inside the controller (11). The spraying mechanism (7) includes a rear track (71), which is fixedly installed in the middle of the back of the paint tank (6). A second motor (72) is fixedly installed on the top of the rear track (71). A lead screw (73) for driving is fixedly installed through the rear track (71) at the bottom output end of the second motor (72). A displacement rod (76) for sliding along the extension direction of the rear track (71) is threadedly connected to the outer surface of the lead screw (73). A connecting frame (74) is fixedly installed at the bottom of the displacement rod (76). An electric spray gun (75) is fixedly installed on the top of the connecting frame (74). The bottom of the electric spray gun (75) passes through the connecting frame (74). The top input end of the electric spray gun (75) is connected to the bottom of the paint tank (6) through a hose. The cleaning mechanism (8) includes a mounting ring frame (81), which is fixedly installed on the side of the connecting frame (74) away from the rear track (71). A drive assembly (82) is fixedly installed on the top of the mounting ring frame (81), and a cleaning disc (83) is fixedly installed through the mounting ring frame (81) at the bottom output end of the drive assembly (82). Cleaning brushes (84) are fixedly installed at equal intervals on the bottom of the cleaning disc (83). The drive assembly (82) includes a drive pulley (821) and a fixed frame (822). The fixed frame (822) is fixedly installed on the top side of the mounting ring frame (81). The drive pulley (821) is rotatably connected to both ends of the top of the mounting ring frame (81). A third motor (823) for driving the drive pulley (821) is fixedly installed on the top of the fixed frame (822). The output end of the third motor (823) passes through the top of the fixed frame (822) and the drive pulley (821) and is fixedly connected. The drive pulleys (821) are connected to each other by a drive belt.

2. The semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 1, characterized in that: The drive mechanism (5) includes a top plate (51), which is fixedly installed on both sides of the upper end of the sliding frame (4). A first motor (52) is fixedly installed on the front of the top plate (51). The output end of the first motor (52) passes through the sliding frame (4) and the top plate (51) and is fixedly installed with a drive wheel (53). The bottom of the drive wheel (53) is fitted and connected to the top of the transverse track (2).

3. The semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 2, characterized in that: The outer surface of the drive wheel (53) is fixedly connected with several anti-slip rubber strips (54) at equal intervals in a circular shape, and the anti-slip rubber strips (54) at the bottom are attached to the top of the transverse track (2).

4. The semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 1, characterized in that: A feeding pipe (12) is fixedly installed on the upper front of the paint tank (6), and a sealing cap (13) is threadedly connected to the top of the feeding pipe (12).

5. A semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 2, characterized in that: The drive mechanism (5) also includes a concave bracket (55), the two ends of which are fixedly connected to the top of the top plate (51), and the laser range sensor (10) is fixedly installed on the inner side of the concave bracket (55), with the laser detection end of the laser range sensor (10) facing the shield (9).

6. The semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 1, characterized in that: The controller (11) has a display screen (14) on the upper front end, and the support rod (1) has a crossbar (15) fixedly installed on the lower back end.

7. A semi-automatic marking device for positioning steel reinforcement in concrete floor slabs according to claim 6, characterized in that: Four sets of transmission guide wheels (824) are fixedly installed at the top center of the mounting ring frame (81), and the transmission guide wheels (824) are connected to the transmission belt.

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