An adjustable spacing reinforcing bar positioning and marking device

Abstract

The application provides an adjustable spacing reinforcing bar positioning mark drawing device, and belongs to the technical field of building construction tools. The adjustable spacing reinforcing bar positioning mark drawing device comprises a rod body structure and a drawing structure. The rod body structure comprises a center rod. A thread is arranged in the center rod, and a limiting peg is fixed to the top of the center rod. A limiting steel sheet is arranged on the center rod, and the limiting steel sheet is connected with the limiting peg through an elastic component. The drawing structure comprises a drawing assembly and a sleeve ring assembly which are arranged on the center rod, and the drawing assembly and the sleeve ring assembly are hinged through a push-pull rod. The outer contour diameter of the drawing assembly is adjusted by adjusting the position of the sleeve ring assembly up and down, so that positioning marks are made on the formwork. The application can quickly draw the positions of reinforcing bars on the formwork, is suitable for various reinforcing bar spacings, improves the reinforcing bar construction efficiency and quality, and has good practicability.

Description

Technical Field

[0001] This invention belongs to the field of construction tools technology, specifically relating to an adjustable spacing rebar positioning mark marking device. Background Technology

[0002] In the construction process of cast-in-place floor slabs in building engineering, the positioning and layout of rebars is a core preliminary step in the rebar installation process. The accuracy and efficiency of the layout directly determine the quality of the rebar laying and the overall construction progress. Currently, the positioning and layout of rebars for floor slabs on domestic construction sites generally adopts the traditional manual drawing method. Workers rely on the rebar spacing parameters marked on the construction drawings, use a steel tape measure to measure section by section on the laid formwork, and then use a marker to draw the installation positioning line for each rebar.

[0003] This traditional construction method has significant technical flaws, resulting in low overall construction efficiency. It relies entirely on manual measurement and line drawing, a cumbersome and time-consuming process that fails to meet the demands of efficient modern construction. Furthermore, manual measurement and line drawing are highly susceptible to the operator's eyesight, technique, experience, and the site environment. The lack of a unified and precise benchmark for line positioning, relying entirely on visual inspection, easily leads to spacing deviations and line offsets, resulting in poor accuracy in rebar positioning. Subsequent rebar laying is prone to uneven distribution and insufficient protective layer thickness, not only reducing the precision of floor slab rebar construction and affecting the structural strength and construction quality of the cast-in-place slab, but also easily causing rework, increasing construction costs, and delaying the project schedule.

[0004] Therefore, it is necessary to develop a positioning and marking device for cast-in-place floor slab reinforcement with adjustable spacing. Summary of the Invention

[0005] To address some shortcomings in existing technologies, this invention provides an adjustable spacing rebar positioning mark drawing device. This invention can quickly mark the position of rebars on templates and is applicable to various rebar spacings, improving the efficiency and quality of rebar construction and demonstrating excellent practicality.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] An adjustable spacing rebar positioning mark marking device includes a rod structure and a marking structure; The rod structure includes a central rod; the central rod has a thread in the middle and a limit pin is fixed at the top; a limit steel plate is sleeved on the central rod, and the limit steel plate is connected to the limit pin through an elastic component; The line drawing structure includes a line drawing assembly and a collar assembly sleeved on a central rod, and the line drawing assembly and the collar assembly are hinged together by a push-pull rod.

[0008] Preferably, the line drawing component includes a positioning box and an ink storage sponge placed inside the positioning box; the positioning box includes multiple fan-shaped box-shaped objects, which together form a circle.

[0009] Preferably, the positioning box comprises eight fan-shaped boxes.

[0010] Preferably, the ink-storing sponge is placed in one of a pair of symmetrically arranged fan-shaped boxes.

[0011] Preferably, the fan-shaped box containing the ink-storing sponge has a small opening to facilitate the exposure of the ink-storing sponge for drawing lines.

[0012] Preferably, each sector-shaped box is hinged to the collar assembly via a push-pull rod.

[0013] Preferably, the collar assembly includes an internally threaded collar and a smooth collar located above it, the internally threaded collar being fixed to the thread of the central rod.

[0014] Preferably, the smooth collar is pushed up and down by rotating the internal threaded collar, which causes the positioning box to contract and expand, thereby changing the outer diameter of the positioning box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The internal threaded collar used in this invention can freely adjust the spacing of the lines. The spacing is 100-150mm and can be freely adjusted to meet the needs of different design spacings.

[0016] (2) The present invention has a simple structure, is easy to operate, is fast and has high precision, which greatly reduces the labor consumption on the construction site. Attached Figure Description

[0017] Figure 1 This is an elevation view of the device of the present invention at the minimum line spacing.

[0018] Figure 2 This is a cross-sectional view of the device of the present invention at the minimum line spacing (1-1).

[0019] Figure 3 This is an elevation view of the device of the present invention at its maximum line spacing.

[0020] Figure 4 2-2 is a cross-sectional view of the device of the present invention at the maximum line spacing.

[0021] Figure label: 1-Center rod, 2-Elastic component, 3-Limiting steel plate, 4-Ink storage sponge, 5-Positioning box, 6-Push-pull rod, 7-Thread, 8-Smooth collar, 9-Internal threaded collar, 10-Limiting stud. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0023] Example 1: like Figures 1-4 As shown, an adjustable spacing rebar positioning mark marking device includes a rod structure and a marking structure; the rod structure includes a central rod 1; the central rod 1 has a thread 7 in the middle and a limiting stud 10 fixed at the top; a limiting steel plate 3 is sleeved on the central rod 1, and the limiting steel plate 3 is connected to the limiting stud 10 through an elastic component 2; the marking structure includes a marking assembly and a collar assembly sleeved on the central rod 1, and the marking assembly and the collar assembly are hinged by a push-pull rod 6.

[0024] In the specific implementation process, the line drawing component includes a positioning box 5 and an ink storage sponge 4 placed inside the positioning box 5; the positioning box 5 includes multiple fan-shaped box-shaped objects, and all the fan-shaped box-shaped objects together form a circle; the positioning box 5 includes 8 fan-shaped box-shaped objects; the ink storage sponge 4 is placed in one of a pair of symmetrically arranged fan-shaped box-shaped objects, and the fan-shaped box-shaped object containing the ink storage sponge 4 has a small opening to facilitate the ink storage sponge 4 to be exposed for line drawing, and each fan-shaped box-shaped object is hinged to the collar assembly through a push-pull rod 6.

[0025] In the specific implementation process, the collar assembly includes an internal threaded collar 9 and a smooth collar 8 located above it. The internal threaded collar 9 is fixed on the thread 7 of the central rod 1. By rotating the internal threaded collar 9, the smooth collar 8 is pushed to slide up and down, causing the positioning box 5 to contract and expand, thereby changing the outer diameter of the positioning box 5.

[0026] In the specific implementation process, the central rod 1 is a DN15 galvanized steel pipe with an outer diameter of 21.3mm; the elastic component 2 is an ordinary cylindrical helical compression spring with an inner diameter of 22mm and a free length of 60mm; the limiting steel plate 4 is a galvanized thin steel plate with a thickness of 1.5mm and a diameter of 64mm; the ink storage sponge 4 is an ordinary polyurethane sponge used to absorb and store printing ink; the positioning box 5 is made of PP plastic material, which includes 8 fan-shaped boxes that can be assembled into a circle. The fan-shaped boxes are 20mm high, fan-shaped, and have an arc of 45 degrees.

[0027] In the specific implementation process, the push-pull rod 6 is a 1.5mm diameter steel rod, with both ends hinged to the positioning box 5 and the smooth collar 8 respectively. When pushed up and down, it can change the outer diameter of the positioning box 5. The thread 7 is a thread processed on the central rod using a wire twisting machine. The smooth collar 8 is a steel ring with an inner diameter of 22mm and a wall thickness of 1mm. Two small rings are welded to the side and hinged to the push-pull rod 6. Moving up and down pushes the push-pull rod 6, causing the outer diameter of the positioning box 5 to change. The internally threaded collar 9 is a steel ring with an inner diameter of 22mm and a wall thickness of 2mm. It has internal mechanical twisting and can be connected to the central rod 1 through the thread 7. The limiting pin 10 is made of metal and is fixed to the top of the central rod 1.

[0028] Example 2: This embodiment provides a method for using the adjustable spacing rebar positioning mark marking device, including the following steps: (1) Preparation before use: According to the structural construction drawings, erect the supporting scaffold and lay the formwork. Clean the formwork thoroughly and ensure a smooth surface. Determine the spacing of the reinforcing bars in the floor slab to be constructed based on the structural drawings.

[0029] (2) Draw lines: Determine the position of the initial reinforcing bar on the template. Drip oil-based pigment into the ink-storing sponge; once absorbed, it is ready to use. Adjust the internal threaded collar of the positioning device. Holding the center rod, roll the side of the positioning box exposed by the ink-storing sponge on the template to extend the positioning box to the appropriate position. The imprints of two adjacent ink-storing sponges on the template should match the spacing of the reinforcing bars in the drawing.

[0030] In practical applications, if a project uses a cast-in-place floor slab with 8mm diameter reinforcing bars spaced 125mm apart, the bar positions must be marked on the laid formwork before installation. Oil-based ink is added to the ink reservoir sponge, the internal threaded collar is adjusted, and a test print is made on paper to measure the spacing. The measured spacing is compared with the spacing on the drawing. If the results are not satisfactory, the internal threaded collar is adjusted vertically, and the test print is repeated until the spacing meets the drawing requirements before the project can be put into use.

[0031] In summary, this invention provides an adjustable-spacing rebar positioning mark marking device. The device comprises a rod structure and a marking structure. The rod structure includes a central rod with a threaded center and a limiting stud fixed at the top. A limiting steel plate is fitted onto the central rod, and the limiting steel plate is connected to the limiting stud via an elastic component. The marking structure includes a marking assembly and a collar assembly fitted onto the central rod, and the two assemblies are hinged together by a push-pull rod. By adjusting the position of the collar assembly, the outer diameter of the marking assembly is adjusted, thereby marking the rebar on the template. This invention can quickly mark the position of rebar on the template, is applicable to various rebar spacings, improves the efficiency and quality of rebar construction, and has excellent practicality.

[0032] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A rebar positioning mark marking device with adjustable spacing, characterized in that: Includes rod structure and line drawing structure; The rod structure includes a central rod (1); the central rod (1) has a thread (7) in the middle and a limiting stud (10) fixed at the top; a limiting steel plate (3) is sleeved on the central rod (1), and the limiting steel plate (3) is connected to the limiting stud (10) through an elastic component (2); The line drawing structure includes a line drawing assembly and a collar assembly sleeved on the central rod (1), and the line drawing assembly and the collar assembly are hinged by a push-pull rod (6).

2. The adjustable spacing rebar positioning mark marking device according to claim 1, characterized in that: The line drawing component includes a positioning box (5) and an ink storage sponge (4) placed inside the positioning box (5); the positioning box (5) includes multiple fan-shaped boxes, which together form a circle.

3. The adjustable spacing rebar positioning mark marking device according to claim 2, characterized in that: The positioning box (5) includes 8 fan-shaped boxes.

4. The adjustable spacing rebar positioning mark marking device according to claim 2, characterized in that: The ink-storing sponge (4) is placed in one of a pair of symmetrically arranged fan-shaped boxes.

5. The adjustable spacing rebar positioning mark marking device according to claim 4, characterized in that: The fan-shaped box containing the ink storage sponge (4) has a small opening to facilitate the exposure of the ink storage sponge (4) for drawing lines.

6. The adjustable spacing rebar positioning mark marking device according to claim 2, characterized in that: Each sector-shaped box is hinged to the collar assembly via a push-pull rod (6).

7. The adjustable spacing rebar positioning mark marking device according to claim 1, characterized in that: The collar assembly includes an internally threaded collar (9) and a smooth collar (8) located above it, the internally threaded collar (9) being fixed to the thread (7) of the central rod (1).

8. The adjustable spacing rebar positioning mark marking device according to claim 7, characterized in that: By rotating the internal threaded collar (9), the smooth collar (8) is pushed up and down, causing the positioning box (5) to contract and expand, thus changing the outer diameter of the positioning box (5).

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