Steel bar positioning and marking device for construction site construction

Abstract

The utility model discloses a steel bar positioning and marking device for construction site construction, and mainly relates to the field of steel bar binding construction. Comprising a moving frame and symmetrically-arranged stand columns, fixing bases are arranged at the bottoms of the stand columns, a guide rope is arranged between the two stand columns, a rotating shaft is rotationally connected to the moving frame, scribing wheels are symmetrically and movably connected to the two ends of the rotating shaft, sliding sleeves are slidably connected to the scribing wheels in the vertical direction, and reset springs are arranged between the sliding sleeves and the scribing wheels; a marking pen is movably connected to the sliding sleeve, a guide wheel is rotationally connected to the movable frame, a groove is formed in the guide wheel, a traction rope is arranged on the movable frame, a rotating roller is rotationally connected to the stand column on one side, and the other end of the traction rope is wound around the rotating roller. The marking device has the advantages that the technical problems that an existing marking device is complex in operation and inaccurate in marking distance control can be solved, guiding control is conducted on the moving path of the marking device, marking operation is automatically conducted in the moving process, and therefore the accuracy of the marking distance is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of rebar tying construction, specifically a rebar positioning and marking device for construction sites. Background Technology

[0002] Before binding rebar in building construction, it is necessary to mark the corresponding positions. During subsequent construction, the rebar is bound according to the marked positions to ensure the accuracy of the rebar binding position and spacing, thus ensuring the quality of building construction. The existing method of rebar positioning and marking generally involves two workers holding a measuring tape at the binding position and then marking lines at the specified spacing. This marking and positioning method is complicated, has low construction efficiency, and a large workload. There are also improved devices in the existing technology that use manual pushing to move the marking device, which automatically performs the marking operation when it moves a specified distance. However, this structure still requires manual pushing of the marking device, which makes it easy for the moving path of the marking device to tilt. After the path tilts, the spacing of the marked lines deviates from the actual spacing, making the spacing between adjacent marked lines inaccurate and affecting the accuracy of rebar marking and positioning. Utility Model Content

[0003] The purpose of this utility model is to provide a rebar positioning and marking device for construction sites. It can solve the technical problems of complex operation and inaccurate control of marking spacing of existing marking devices. It guides and controls the movement path of the marking device to avoid tilting of the movement path. It automatically performs marking operation during movement, thereby ensuring the accuracy of marking spacing.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A rebar positioning and marking device for construction sites includes a movable frame and symmetrically arranged columns. Each column has a fixed base at its bottom, and a guide rope is positioned between the two columns. A rotating shaft is rotatably connected to the movable frame, and marking wheels are movably connected to both ends of the rotating shaft. A sliding sleeve is slidably connected to each marking wheel along a vertical direction, and a return spring is provided between the sliding sleeve and the marking wheel. A marking pen is movably connected to the sliding sleeve, with its end extending to the outside of the marking wheel. A guide wheel is rotatably connected to the movable frame, and a groove is provided on the guide wheel. The groove on the guide wheel rolls in contact with the guide rope. A traction rope is provided on the movable frame, and a rotating roller is rotatably connected to one of the columns. The other end of the traction rope is wound around the rotating roller.

[0006] Furthermore, the edge of the marking wheel is provided with a groove, the sliding sleeve is slidably connected in the groove in a vertical direction, and the return spring is disposed between the bottom of the sliding sleeve and the groove.

[0007] Furthermore, the sliding sleeve is provided with a socket, and the marking pen is movably inserted into the socket.

[0008] Furthermore, a fixed disk is symmetrically provided on the rotating shaft, and the scribing wheel is movably connected to the fixed disk.

[0009] Furthermore, bolt holes are provided at corresponding positions of the marking wheel and the fixing plate, and fixing bolts are provided in the bolt holes.

[0010] Furthermore, a take-up roller is rotatably connected to one of the columns, one end of the guide rope is wound around the take-up roller, and the other end of the guide rope is fixed to the column on the other side.

[0011] Furthermore, the take-up roller is equipped with a ratchet, and the column is equipped with a pawl that works in conjunction with the ratchet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The structure of this utility model includes a movable frame and symmetrically arranged columns. The columns on both sides are fixed to the ground by fixed seats. A guide rope is provided between the columns on both sides. A guide wheel is rotatably connected to the movable frame. The guide wheel has a groove and the groove makes rolling contact with the guide rope. A traction rope is provided on the movable frame. A rotating roller is rotatably connected to one of the columns. One end of the traction rope is wound around the rotating roller. In use, only the rotating roller on one of the columns needs to be rotated. The movable frame can be moved along the guide rope under the drive of the traction rope. The rolling contact between the groove of the guide wheel on the movable frame and the guide rope ensures the accuracy of the moving path of the movable frame, thereby ensuring accurate positioning and marking operations on the moving path, avoiding the tilt of the marking path, and ensuring the accuracy of the marking spacing.

[0014] 2. A rotating shaft is rotatably connected to the movable frame. Two scribing wheels are symmetrically connected to both ends of the shaft. A sliding sleeve is slidably connected to the scribing wheels along a vertical direction. A return spring is installed between the sliding sleeve and the scribing wheels. A scribing pen is movably connected to the sliding sleeve, with its end extending to the outside of the scribing wheels. In this structure, when the movable frame moves, after the scribing wheels rotate one revolution, the scribing pen protruding from the wheels marks the designated position. When the scribing pen marks the line, it is compressed and, driven by the sliding sleeve, slides relative to the scribing wheels, compressing the return spring and resetting it. The spring's counterforce acts on the marking pen, ensuring it leaves a sufficiently clear mark at the marking position, thus guaranteeing the clarity of the line. As the marking wheel continues to rotate, the marking pen loses its pressure and slides in the opposite direction under the action of the return spring, sliding back to the position protruding from the marking wheel to prepare for the next marking operation. This improves the convenience and accuracy of the marking operation. Furthermore, different sizes of marking wheels on the rotating shaft can be replaced according to the spacing of the lines, allowing the distance of each rotation of the marking wheel to change, meeting the needs of construction with different marking spacing. Attached Figure Description

[0015] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Appendix Figure 2 This is the right view of this utility model.

[0017] Appendix Figure 3 This is an appendix to this utility model. Figure 2 A cross-sectional view along the AA direction.

[0018] Appendix Figure 4 This is an appendix to this utility model. Figure 3 Cross-sectional view along the BB direction.

[0019] Appendix Figure 5 This is an appendix to this utility model. Figure 4 A magnified view of part C in the middle.

[0020] The labels shown in the attached diagram:

[0021] 1. Moving frame; 2. Column; 3. Fixed base; 4. Guide rope; 5. Rotating shaft; 6. Marking wheel; 7. Sliding sleeve; 8. Return spring; 9. Marking pen; 10. Guide wheel; 11. Groove; 12. Traction rope; 13. Rotating roller; 14. Slide groove; 15. Insertion hole; 16. Fixed plate; 17. Bolt hole; 18. Fixing bolt; 19. Take-up roller; 20. Ratchet; 21. Pad. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0023] Reference Figure 1 and Figure 2This utility model describes a rebar positioning and marking device for construction sites. The main structure includes a movable frame 1 and symmetrically arranged columns 2, which provide support. The bottom of each column 2 is fixed with a mounting base 3 by welding or bolts. The mounting base 3 is bolted to both ends of the marking path. The movable frame 1 moves between the two columns 2. A guide rope 4, made of metal or nylon, is provided between the two columns 2 and is taut and fixed to provide guidance. A rotating shaft 5 is rotatably connected to the movable frame 1 via bearings. Marking wheels 6 are symmetrically and movably connected to both ends of the rotating shaft 5. The marking wheels 6 are fixed to both ends of the rotating shaft 5 using any existing detachable connection method. The rotating shaft 5 enables the marking wheels 6 to move relative to each other. The rotating motion of the movable frame 1 is achieved by two inclined rods. One end of each rod is rotatably connected to a rotating shaft 5 via a bearing, and the other ends are connected by a connecting rod. A sliding sleeve 7 is slidably connected vertically to the marking wheel 6. The sliding sleeve 7 slides radially along the marking wheel 6. A return spring 8 is provided between the sliding sleeve 7 and the marking wheel 6. A marking pen 9 is movably connected to the sliding sleeve 7. The marking pen 9 can be any commercially available ink-containing marker, and it is fixed to the sliding sleeve 7 in any detachable manner. The end of the marking pen 9 extends to the outside of the marking wheel 6. This structure allows the end of the marking pen 9 to protrude beyond the edge of the marking wheel 6, so that the marking pen 9 can mark a designated position after the marking wheel 6 has rotated once. During the process, the marking pen 9 and the sliding sleeve 7 are squeezed and slide towards the center of the marking wheel 6, compressing the return spring 8. The reverse elastic force generated by the return spring 8 acts on the sliding sleeve 7 and the marking pen 9, making the marking pen 9 make a clearer and more obvious mark at the designated position, making the positioning marking of the rebar binding position more obvious. After marking, the marking wheel 6 continues to rotate. After the marking pen 9 leaves the marking position, the sliding sleeve 7, under the action of the return spring 8, drives the marking pen 9 to slide back and reset, so that the marking pen 9 protrudes from the marking wheel 6 again, preparing for the next marking. This structure makes the spacing between adjacent markings equal to the arc length of the marking wheel 6. By replacing different marking wheels 6, it can adapt to construction needs with different marking spacings. The structure is simple and improves the efficiency and convenience of positioning marking. The movable frame 1 is rotatably connected to a guide wheel 10 via bearings. The guide wheel 10 has a groove 11, which is recessed inwards from its surface. The width of the groove 11 is adapted to the diameter of the guide rope 4. The groove 11 on the guide wheel 10 rolls in contact with the guide rope 4. This structure makes the direction of movement of the movable frame 1 more accurate under the rolling cooperation of the groove 11 on the guide wheel 10 and the guide rope 4, thus avoiding path deviation that may occur due to manual pushing, and ensuring the accuracy of the marking spacing. The movable frame 1 is equipped with a traction rope 12, which is attached to the movable frame 1 or fixed to it with bolts. A rotating roller 13 is rotatably connected to one side of the upright column 2 via bearings, and one end of the rotating roller has a crank handle.The rotating roller 13 is driven by a hand crank, and the other end of the traction rope 12 is wound around the rotating roller 13. This structure, with the two end posts 2 fixed to the ends of the marking path, allows the rotating roller 13 to be rotated from one end, driving the moving frame 1 along the guide rope 4 under the pull of the traction rope 12. During this process, the marking pen 9 on the marking wheel 6 automatically marks the lines, greatly simplifying the positioning and marking operation and improving the accuracy and convenience of positioning and marking.

[0024] Preferred, refer to Figure 4 and Figure 5 The edge of the marking wheel 6 is provided with a groove 14, which is recessed inward from the edge of the marking wheel 6. The sliding sleeve 7 is vertically slidably connected in the groove 14. The return spring 8 is disposed between the bottom of the sliding sleeve 7 and the bottom of the groove 14. The groove 14 is configured to guide the radial sliding of the sliding sleeve 7, ensuring the stability of the marking pen 9 sliding along the radial direction on the sliding sleeve 7. At the same time, during sliding, the return spring 8 between the bottom of the sliding sleeve 7 and the groove 14 is accurately compressed, so that the reverse force of the compressed spring can be accurately applied to the marking pen 9, making the marking more obvious and clear.

[0025] Preferably, the sliding sleeve 7 is provided with a socket 15, and the drawing pen 9 is movably inserted into the socket 15. This structure makes the cooperation between the drawing pen 9 and the sliding sleeve 7 simpler. When the drawing pen 9 runs out of ink and needs to be replaced, it can simply be pulled off the sliding sleeve 7, which reduces the difficulty of later maintenance and replacement.

[0026] Preferably, a fixed plate 16 is symmetrically fixed to the rotating shaft 5 by welding or bolts, and the scribing wheel 6 is movably connected to the fixed plate 16. This structure allows the scribing wheel 6 and the rotating shaft 5 to be detachably connected by connecting or separating from the fixed plate 16. The fixed plate 16 increases the contact area between the scribing wheel 6 and the rotating shaft 5, further improving the stability of the detachable connection structure between the scribing wheel 6 and the rotating shaft 5.

[0027] Preferably, bolt holes 17 are provided at corresponding positions on the marking wheel 6 and the fixing plate 16. Fixing bolts 18 are provided in the bolt holes 17. The fixing bolts 18 pass through the bolt holes 17 on the marking wheel 6 and the fixing plate 16 in sequence and are threadedly connected to the nuts. This makes it possible to replace the marking wheel 6 by simply removing the fixing bolts 18, which further simplifies the replacement steps of the marking wheel 6 and improves the convenience of replacing and using marking wheels 6 of different sizes.

[0028] Preferred, refer to Figure 3One of the columns 2 is rotatably connected to a take-up roller 19 via a bearing. One end of the guide rope 4 is wound around the take-up roller 19, and the other end of the guide rope 4 is tied to or fixed to the column 2 on the other side by bolts. This structure allows the length of the guide rope 4 to be adaptively adjusted according to the length of the required marking position. Simply rotating the take-up roller 19 allows the guide rope 4 to be released or retrieved from the take-up roller 19, thereby matching the length of the guide rope 4 between the two columns 2 with the distance between the two columns 2 after movement, meeting the needs of rebar binding and positioning marking for buildings of different sizes.

[0029] Preferably, a ratchet 20 is fixed to the take-up roller 19 by welding or bolts, and a pawl 21 is provided on the column 2 to cooperate with the ratchet 20. Specifically, the ratchet 20 is rotatably connected to the column 2 by a pin or hinge, and a torsion spring is provided between it and the column 2. The pawl 21 engages with the ratchet 20. When releasing the line, the pawl 21 is manually removed to disengage it from the ratchet 20. The take-up roller 19 rotates to release the line so that the length of the traction rope 12 matches the distance between the two columns 2. Then, the pawl 21 is released so that it automatically engages with the ratchet 20 under the action of the torsion spring. At this time, the take-up roller 19 cannot rotate in the direction of releasing the line, so that the guide rope 4 after releasing the line is taut between the two columns 2, ensuring the accuracy of guiding the moving frame 1 and further improving the accuracy of positioning and marking the moving frame 1.

[0030] Working Principle: The structure of this utility model includes a movable frame 1 and symmetrically arranged columns 2. The columns 2 on both sides are fixed to the ground by fixing seats 3. A guide rope 4 is provided between the columns 2 on both sides. A guide wheel 10 is rotatably connected to the movable frame 1. The guide wheel 10 has a groove 11, which rolls in contact with the guide rope 4. A traction rope 12 is provided on the movable frame 1. A rotating roller 13 is rotatably connected to one of the columns 2. One end of the traction rope 12 is wound around the rotating roller 13. In use, only the rotating roller 13 on one of the columns 2 needs to be rotated to move the movable frame 1 along the guide rope 4 under the drive of the traction rope 12. The rolling contact between the groove 11 of the guide wheel 10 on the movable frame 1 and the guide rope 4 ensures the accuracy of the moving path of the movable frame 1, thereby ensuring accurate positioning and marking operations on the moving path, avoiding tilting of the marking path, and ensuring the accuracy of the marking spacing. A rotating shaft 5 is rotatably connected to the movable frame 1. Marking wheels 6 are symmetrically and movably connected to both ends of the rotating shaft 5. A sliding sleeve 7 is vertically connected to the upper edge of the marking wheel 6. A return spring 8 is provided between the sliding sleeve 7 and the marking wheel 6. A marking pen 9 is movably connected to the sliding sleeve 7, with the end of the marking pen 9 extending to the outside of the marking wheel 6. With this structure, when the moving frame 1 moves, after the marking wheel 6 rotates one revolution, the marking pen 9 protruding from the marking wheel 6 marks the designated position. When the marking pen 9 marks the position, it is squeezed and slides relative to the marking wheel 6 under the action of the sliding sleeve 7, compressing the return spring 8. The counterforce of the return spring 8 acts on the marking pen 9. The marking pen 9 leaves a sufficiently clear mark at the marking position, thus ensuring the clarity of the marking. When the marking wheel 6 continues to rotate, the marking pen 9 loses its pressure and slides in the opposite direction under the action of the return spring 8, sliding back to the position protruding from the marking wheel 6 to prepare for the next marking operation. This improves the convenience and accuracy of the marking operation. In addition, different sizes of marking wheels 6 on the rotating shaft 5 can be replaced according to the spacing of the marking, so that the distance of each rotation of the marking wheel 6 changes, meeting the needs of construction with different marking spacing.

Claims

1. A rebar positioning and marking device for construction sites, comprising a movable frame (1) and symmetrically arranged columns (2), wherein the bottom of the columns (2) is provided with a fixed seat (3), characterized in that: A guide rope (4) is provided between the two columns (2). A rotating shaft (5) is rotatably connected to the movable frame (1). A marking wheel (6) is symmetrically and movably connected to both ends of the rotating shaft (5). A sliding sleeve (7) is slidably connected to the marking wheel (6) along the vertical direction. A return spring (8) is provided between the sliding sleeve (7) and the marking wheel (6). A marking pen (9) is movably connected to the sliding sleeve (7). The end of the marking pen (9) extends to the outside of the marking wheel (6). A guide wheel (10) is rotatably connected to the movable frame (1). A groove (11) is provided on the guide wheel (10). The groove (11) on the guide wheel (10) rolls in contact with the guide rope (4). A traction rope (12) is provided on the movable frame (1). A rotating roller (13) is rotatably connected to one of the columns (2). The other end of the traction rope (12) is wound around the rotating roller (13).

2. The rebar positioning and marking device for construction sites according to claim 1, characterized in that: The edge of the marking wheel (6) is provided with a groove (14), the sliding sleeve (7) is slidably connected in the groove (14) in the vertical direction, and the return spring (8) is provided between the bottom of the sliding sleeve (7) and the groove (14).

3. The rebar positioning and marking device for construction sites according to claim 2, characterized in that: The sliding sleeve (7) is provided with a socket (15), and the marking pen (9) is movably inserted into the socket (15).

4. The rebar positioning and marking device for construction sites according to claim 1, characterized in that: A fixed disk (16) is symmetrically provided on the rotating shaft (5), and the marking wheel (6) is movably connected to the fixed disk (16).

5. The rebar positioning and marking device for construction sites according to claim 4, characterized in that: The marking wheel (6) and the fixed plate (16) are provided with bolt holes (17) at corresponding positions, and fixing bolts (18) are provided in the bolt holes (17).

6. The rebar positioning and marking device for construction sites according to claim 1, characterized in that: A take-up roller (19) is rotatably connected to one of the columns (2), one end of the guide rope (4) is wound around the take-up roller (19), and the other end of the guide rope (4) is fixed to the column (2) on the other side.

7. The rebar positioning and marking device for construction sites according to claim 6, characterized in that: The take-up roller (19) is provided with a ratchet (20), and the column (2) is provided with a pawl (21) for use with the ratchet (20).

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