Steel bar threading and polishing protection device

Abstract

The utility model belongs to the field of constructional engineering, and particularly relates to a steel bar threading and polishing protection device which comprises a support used for placing steel bars and a workbench used for installing a threading and polishing machine, and further comprises a protection box, and the front end and the rear end of the protection box are fixed to the workbench and the support together. A small round hole is formed in the rear side face of the protection box, a large round hole is formed in the rear side face of the protection box, and a grinding piece of the threading grinding machine is located in the protection box. And a drawable drawer is arranged at the bottom of the protection box. According to the device, sparks and scrap iron generated during steel bar mantle fiber polishing can be isolated in one protection box, the sparks are prevented from splashing during polishing, the scrap iron can be collected and cleaned in time, and safety and civilization of a construction site are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering, and in particular relates to a protective device for grinding rebar threads. Background Technology

[0002] While rebar threading and grinding is a tedious task, its importance in construction engineering cannot be ignored. The surface of threaded rebar ends often has defects such as unevenness and burrs. These defects can cause obstacles and errors during installation, especially for connectors in important structures such as beams and columns. A rough surface can even lead to poor thread sealing or detachment, affecting the stability and safety of the entire structure. Grinding the rebar threads ensures the quality and safety of the entire structure. Currently, on construction sites, rebar threading and grinding is mostly done by workers pushing the rebar on a support frame and placing the threaded rebar under the grinding disc of the threading grinder. This process generates a large number of sparks, which firstly affects on-site fire safety management, and secondly, the iron filings generated during grinding, if not cleaned up promptly, can negatively impact civilized construction and cause waste accumulation. Furthermore, workers pressing the rebar from a distance during threading and grinding results in poor stability, and workers relying on experience to deliver the rebar length inconsistently, making it difficult to guarantee the grinding length and quality. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a protective device for grinding rebar threads.

[0004] This invention is achieved through the following technical solution:

[0005] A protective device for rebar threading and grinding includes a bracket for placing the rebar and a workbench for mounting a threading and grinding machine. It also includes a protective box located between the bracket and the workbench. The width of the protective box is equal to the width of the workbench. Several L-shaped connecting pieces A are welded to the left and right sides of the protective box near the workbench. Corresponding L-shaped connecting pieces B are welded to the left and right sides of the workbench near the protective box. The L-shaped connecting pieces A and B have corresponding connecting holes. Fixing bolts A pass through the connecting holes to fix the protective box and the workbench together. Two L-shaped connecting pieces C are symmetrically arranged on the rear side of the protective box. The distance between the two L-shaped connecting pieces C is equal to the width of the bracket. The L-shaped connecting pieces C are provided with threaded holes C. Threaded holes D corresponding to threaded holes C are provided on the left and right sides of the front part of the bracket. The protective box is fixed to the bracket by fixing bolts C passing through threaded holes C and threaded holes D. The rear side of the protective box is provided with a small round hole through which a steel bar passes. The front side of the protective box is provided with a large round hole through which the body of the threading grinding machine can pass. The grinding disc of the threading grinding machine is located inside the protective box. The bottom of the protective box is provided with a pull-out drawer.

[0006] Preferably, the upper end of the bracket is a support block, and a groove is provided in the middle of the upper surface of the support block along the length direction of the support block, and the width of the groove is equal to the diameter of the reinforcing bar.

[0007] Preferably, the upper surface of the support strip on either side of the groove is provided with a scale, and the foremost point of the support strip is the zero point of the scale.

[0008] Preferably, a plurality of inverted U-shaped support blocks are provided on the upper surface of the support block along the length direction of the support block, and threaded holes E are provided on the inverted U-shaped support blocks. The threaded holes E are internally threaded with clamping bolts, the clamping bolts are directly opposite the grooves, and the diameter of the clamping bolts is smaller than the width of the grooves.

[0009] Preferably, the bottom end of the clamping bolt is provided with a rubber sheet.

[0010] Preferably, a guide cylinder is welded to the inner wall of the protective box corresponding to the small circular hole. The guide cylinder is divided into a frustum cylindrical part and a cylindrical part, wherein the inner diameter of the frustum cylindrical part gradually decreases forward, and the inner diameter of the cylindrical part is equal to the diameter of the reinforcing bar.

[0011] Preferably, the guide cylinder is 5-10cm in length.

[0012] Preferably, the diameter of the small circular hole is larger than the diameter of the reinforcing bar.

[0013] Preferably, the small circular hole is 3-10 mm larger than the diameter of the reinforcing bar.

[0014] Preferably, the drawer is provided with a pull ring.

[0015] The grinding protection device of this invention can isolate the sparks and iron filings generated during the grinding of rebar threads within a protective box, preventing sparks from flying everywhere. It can also collect and clean iron filings in a timely manner, ensuring the safety and civility of the construction site. In addition, the device of this invention makes the rebar stable during the grinding process and can also accurately control the grinding length of the threads, ensuring consistent grinding length and guaranteeing grinding quality. Attached Figure Description

[0016] Figure 1 This is a side view of the overall structure of this embodiment;

[0017] Figure 2 This is a schematic diagram of the overall structure from the rear view of this embodiment;

[0018] Figure 3 This is a schematic diagram of the structure behind the protective box and the workbench in this embodiment;

[0019] Figure 4 This is a schematic diagram of the protective box and the front structure of the workbench in this embodiment;

[0020] Figure 5 This is a schematic diagram of the guide tube structure in this embodiment;

[0021] Figure 6 This is a schematic diagram of the support structure in this embodiment;

[0022] Figure 7 This is a partially enlarged structural diagram of the inverted U-shaped support block in this embodiment.

[0023] In the diagram, 1 is a reinforcing bar, 2 is a bracket, 3 is a threaded grinding machine, 4 is a workbench, 5 is a protective box, 6 is an L-shaped connecting piece A, 7 is an L-shaped connecting piece B, 8 is a fixing bolt A, 9 is an L-shaped connecting piece C, 10 is a threaded hole D, 11 is a fixing bolt C, 12 is a small round hole, 13 is a large round hole, 14 is a drawer, 15 is a pull ring, 16 is a support strip, 17 is a groove, 18 is a scale, 19 is an inverted U-shaped support block, 20 is a clamping bolt, 21 is a rubber sheet, 22 is a guide tube, 23 is a frustum section, and 24 is a cylindrical section. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0025] This embodiment includes a bracket 2 for placing the reinforcing bar 1 and a workbench 4 for mounting a threading grinder 3. The bracket 2 is located behind the workbench 4 and is used to place the reinforcing bar 1. The threading grinder 3 is mounted on the workbench 4, and there is a certain distance between the bracket 2 and the threading grinder 3. Currently, during construction, workers usually place the reinforcing bar 1 on the bracket 2 and then push the reinforcing bar 1 forward from the bracket 2 so that the thread of the reinforcing bar 1 is below the grinding disc of the threading grinder 3. Then, the threading grinder 3 is turned on to grind the thread. During the grinding process, sparks fly and iron filings fall all over the ground. Therefore, this embodiment sets up a protective box 5 between the bracket 2 and the workbench 4. The width of the protective box 5 is equal to the width of the workbench 4. The protective box 5 is hollow inside, and its rear end is fixed to the bracket 2 and its front end is fixed to the workbench 4. Specifically, several L-shaped connecting pieces A6 are welded to the left and right sides of the protective box 5 near the workbench 4. L-shaped connecting pieces B7, corresponding to the L-shaped connecting pieces A6, are welded to the left and right sides of the workbench 4 near the protective box 5. Corresponding connecting holes are provided on the L-shaped connecting pieces A6 and B7. Fixing bolts A8 pass through these connecting holes to connect the L-shaped connecting pieces A6 and B7 together, thus fixing the front end of the protective box 5 to the workbench 4. Two L-shaped connecting pieces C9 are symmetrically welded to the rear side of the protective box 5, with the distance between the two L-shaped connecting pieces C9 equal to the width of the bracket 2. The bracket 2 is sandwiched between the two L-shaped connecting pieces C9. Threaded holes C are provided on the L-shaped connecting pieces C9. Threaded holes D10, corresponding to the threaded holes C, are provided on the left and right sides of the front of the bracket 2. Fixing bolts C11, passing through the threaded holes C and D10, fix the protective box 5 to the bracket 2 together.

[0026] The bracket 2 in this embodiment includes a support leg and a horizontal support block 16 above the support leg. A groove 17 is provided in the middle of the upper surface of the support block 16 along the length direction of the support block 16. The width of the groove 17 is equal to the diameter of the reinforcing bar 1. The reinforcing bar 1 is placed in the groove 17 and is pushed forward in the groove 17.

[0027] On the rear side of the protective box 5, corresponding to the position of the reinforcing bar 1, there is a small round hole 12 through which the reinforcing bar 1 can pass. The reinforcing bar 1 enters the protective box 5 through the small round hole 12. On the front side of the protective box 5, there is a large round hole 13 through which the body of the threading grinder 3 can pass. In normal installation, the grinding disc of the threading grinder 3 extends out of the worktable 4, so the grinding disc of the threading grinder 3 is located inside the protective box 5. At the bottom of the protective box 5, there is a pull-out drawer 14, which is used to collect falling iron filings. There is a pull ring 15 on the drawer 14. When there are a lot of iron filings falling into the protective box 5, the drawer 14 can be pulled out to empty the iron filings and then put back into the protective box 5. This can clean up the iron filings in time and ensure civilized construction. During construction, the worker places the steel bar 1 on the support 2 and pushes the steel bar 1 forward so that it passes through the small round hole 12. The length of the steel bar 1 entering the protective box 5 is controlled according to the size of the protective box 5 and experience. The steel bar 1 is located directly below the grinding disc. Then the threading grinding machine 3 is turned on for grinding. Sparks will not fly everywhere inside the protective box 5. The falling iron filings fall into the drawer 14 below.

[0028] To further precisely control the delivery position of the reinforcing bar 1, preferably, a scale 18 is provided on the upper surface of the support block 16 on either side of the groove 17, with the foremost point of the support block 16 being the zero point of the scale 18, i.e., the foremost point of the support block 16 being the starting point of the scale 18. Workers can directly and accurately calculate the length that the reinforcing bar 1 should be pushed forward into the protective box 5 based on the dimensions of the protective box 5 and the position of the grinding disc. Then, subtracting the pushed length from the total length of the reinforcing bar 1 gives the length of the reinforcing bar 1 remaining on the support block 16. This allows the calculation of the scale 18 position where the rear end of the reinforcing bar 1 should be located. During delivery, the rear end of the reinforcing bar 1 is pushed to the calculated scale 18 position.

[0029] To ensure the stability of the reinforcing bar 1, it is preferable to weld several inverted U-shaped support blocks 19 along the length of the support block 16 on the upper surface of the support block 16, with the inverted U-shaped support blocks 19 spanning the groove 17. A threaded hole E is provided on the inverted U-shaped support block 19, and a clamping bolt 20 is threaded into the threaded hole E. The clamping bolt 20 is directly opposite the groove 17 and is used to press down and control the reinforcing bar 1. The diameter of the clamping bolt 20 is smaller than the width of the groove 17. To prevent the clamping bolt 20 from damaging the surface of the reinforcing bar 1, it is preferable to have a rubber sheet 21 at the bottom of the clamping bolt 20, which tightly presses against the surface of the reinforcing bar 1 during clamping. After the workers push the reinforcing bar 1 to the designed position, they then rotate the clamping bolt 20 downwards to firmly press the reinforcing bar 1 in place, ensuring the stability of the reinforcing bar 1 during the grinding process.

[0030] To facilitate the insertion of the reinforcing bar 1 into the protective box 5, and to ensure greater stability of the reinforcing bar 1 inside the protective box 5, it is preferable that the diameter of the small round hole 12 is larger than the diameter of the reinforcing bar 1, preferably 3-10mm larger. A guide cylinder 22 is welded to the inner wall of the protective box 5 corresponding to the small round hole 12. The guide cylinder 22 is 5-10cm long and consists of a rear frustum-shaped section 23 and a front cylindrical section 24. The frustum-shaped section 23 and the cylindrical section 24 are smoothly connected as a single unit. The inner diameter of the frustum-shaped section 23 gradually decreases forward, while the inner diameter of the cylindrical section 24 is equal to the diameter of the reinforcing bar 1. This way, after the reinforcing bar 1 passes through the small round hole 12 and enters the guide cylinder 22, it is easier to first pass through the slightly larger frustum-shaped section 23, and then gradually enter the cylindrical section 24, reducing the difficulty of insertion.

[0031] During construction, the worker places the steel bar 1 to be ground in the groove 17, then pushes the steel bar 1 forward into the protective box 5, and sends the thread end directly below the grinding disc of the thread grinding machine 3. The worker controls the position of the rear end of the steel bar 1 at the scale 18 according to the length pushed, then tightens the clamping bolt 20 to firmly press the entire steel bar 1, and starts grinding with the thread grinding machine 3. After grinding the steel bar 1, the worker loosens the clamping bolt 20 to remove the steel bar 1, and then grinds the next steel bar 1. Throughout the process, the sparks generated by the grinding disc are isolated in the protective box 5. When there is too much iron filings, the worker pulls out the drawer 14 to empty the iron filings.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A protective device for rebar threading and grinding, comprising a bracket (2) for placing rebar (1) and a workbench (4) for mounting a threading and grinding machine (3), characterized in that: It also includes a protective box (5) located between the support (2) and the workbench (4). The width of the protective box (5) is equal to the width of the workbench (4). Several L-shaped connecting pieces A (6) are welded to the left and right sides of the protective box (5) near the workbench (4). L-shaped connecting pieces B (7) corresponding to the L-shaped connecting pieces A (6) are welded to the left and right sides of the workbench (4) near the protective box (5). The L-shaped connecting pieces A (6) and B (7) are provided with corresponding connecting holes. Fixing bolts A (8) pass through the connecting holes to fix the protective box (5) and the workbench (4) together. Two L-shaped connecting pieces C (9) are symmetrically provided on the rear side of the protective box (5). The spacing between the connecting pieces C (9) is equal to the width of the bracket (2). The L-shaped connecting piece C (9) is provided with threaded holes C. The left and right sides of the front part of the bracket (2) are respectively provided with threaded holes D (10) corresponding to the threaded holes C. The protective box (5) is fixed together with the bracket (2) by fixing bolts C (11) passing through the threaded holes C and D (10). The rear side of the protective box (5) is provided with a small round hole (12) through which the steel bar (1) passes. The front side of the protective box (5) is provided with a large round hole (13) through which the body of the threading grinding machine (3) passes. The grinding disc of the threading grinding machine (3) is located inside the protective box (5). The bottom of the protective box (5) is provided with a pull-out drawer (14).

2. The rebar threading grinding protection device according to claim 1, characterized in that: The upper end of the bracket (2) is a support block (16), and a groove (17) is provided in the middle of the upper surface of the support block (16) along the length direction of the support block (16). The width of the groove (17) is equal to the diameter of the steel bar (1).

3. The rebar threading grinding protection device according to claim 2, characterized in that: The upper surface of the support block (16) on either side of the groove (17) is provided with a scale (18), and the front end of the support block (16) is the zero point of the scale (18).

4. The rebar threading grinding protection device according to claim 2 or 3, characterized in that: The upper surface of the support strip (16) is provided with a number of inverted U-shaped support blocks (19) along the length direction of the support strip (16). The inverted U-shaped support blocks (19) are provided with threaded holes E, and the threaded holes E are connected to the internal threads of the clamping bolts (20). The clamping bolts (20) are directly opposite the grooves (17), and the diameter of the clamping bolts (20) is smaller than the width of the grooves (17).

5. The rebar threading grinding protection device according to claim 4, characterized in that: The bottom end of the clamping bolt (20) is provided with a rubber sheet (21).

6. The rebar threading grinding protection device according to claim 4, characterized in that: The guide tube (22) is welded on the inner wall of the protective box (5) corresponding to the small round hole (12). The guide tube (22) is divided into a frustum cylindrical part (23) and a cylindrical part (24). The inner diameter of the frustum cylindrical part (23) gradually decreases forward, and the inner diameter of the cylindrical part (24) is equal to the diameter of the steel bar (1).

7. The rebar threading grinding protection device according to claim 6, characterized in that: The guide tube (22) is 5-10cm long.

8. The rebar threading grinding protection device according to claim 6, characterized in that: The diameter of the small round hole (12) is larger than the diameter of the reinforcing bar (1).

9. The rebar threading grinding protection device according to claim 8, characterized in that: The small round hole (12) is 3-10 mm larger in diameter than the steel bar (1).

10. The rebar threading grinding protection device according to claim 4, characterized in that: The drawer (14) is provided with a pull ring (15).

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