Detection ruler for road and bridge construction

Abstract

The utility model relates to the technical field of road and bridge construction tools, in particular to a detection ruler for road and bridge construction, which comprises a fixed box, the left end part of the fixed box is rotatably connected with a measuring plate, the right end part of the fixed box is provided with two arc rails in bilateral symmetry, and the arc rails can be clamped on the measuring plate through slots. An extension plate is slidably connected into the measuring plate, scale grooves are formed in the upper end faces of the measuring plate and the extension plate, arc notch grooves are formed in the two arc rails, the left end and the right end of the measuring plate are in threaded connection with an angle positioning block and a length positioning block respectively, the angle positioning block and the length positioning block are located in the two arc rails respectively, and a sliding groove is formed in the left end of the extension plate. And through limiting of the angle positioning block and the length positioning block, the angle positioning block and the length positioning block are rotated during disassembly, the arc rail can be taken out from the upper end, and disassembly and storage are convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of road and bridge construction tools, specifically a measuring tool for road and bridge construction. Background Technology

[0002] During road and bridge construction, it is necessary to ensure that the road surface has a certain slope. Traditionally, slope meters are used for measurement. However, due to their short range, slope meters require workers to perform multiple measurements, resulting in low efficiency and significant errors.

[0003] When constructing a continuous road surface with a fixed slope in a road or bridge, or when erecting precast road panels with a fixed slope during road or bridge construction, the slope measurement of the continuous road surface still requires multiple measurements. It is inconvenient to adjust and control the length and angle of the measuring instruments, and multiple sets of adjustments and measurements are required, which increases the amount of equipment that needs to be carried. Summary of the Invention

[0004] The purpose of this utility model is to provide a measuring tool for road and bridge construction, which overcomes the above-mentioned defects in the prior art.

[0005] According to this utility model, a measuring tool for road and bridge construction includes a fixed box. A measuring plate is rotatably connected to the left end of the fixed box. Two symmetrical arc rails are provided on the right end of the fixed box. The arc rails are slotted and locked onto the measuring plate. The measuring plate and the two arc rails slide together. An extension plate is slidably connected inside the measuring plate. A groove is provided at the upper end of the measuring plate, and a sliding push block is provided on the groove. The push block is connected to the extension plate. A limiting plate is fixed at the rear end of the extension plate. Scale grooves are provided on the upper surfaces of both the measuring plate and the extension plate. Arc grooves are provided on both arc rails. An angle positioning block and a length positioning block are threaded to the left and right ends of the measuring plate, respectively. The locating blocks, angle locating blocks and length locating blocks are respectively located within the two arc rails. The left end of the extension plate has a sliding groove. The lower end of the fixed box has two symmetrical openings. A bidirectional screw is rotatably connected to the fixed box. The threads at the front and rear ends of the bidirectional screw are opposite. The bidirectional screw extends rearward and penetrates the fixed box. A turntable is fixed to the rear end of the bidirectional screw. Two symmetrical threaded sliders are threadedly connected to the outer circumference of the bidirectional screw. A hinge rod is connected between each of the two threaded sliders and the two openings. The hinge rod is hinged in three sections. Each set of hinge rods is connected to two support plates. The rotatable connection position between the fixed box and the measuring plate is coaxial with the arc rail.

[0006] The beneficial effects of this utility model are:

[0007] The hinge rod can extend to the outer end of the cavity and abut against the ground through the support plate, increasing the contact area between the lower end of the fixing box and the ground, thus increasing the stability of the fixing box when placed. By rotating the angle positioning block on the measuring plate, the angle positioning block is made to fit tightly against the arc groove, thereby restricting the up and down rotation of the measuring plate. This allows for the quick determination of the tilt angle of the measuring plate at the arc rail without the need for repositioning for measurement, facilitating angle fixing. The arc rail is inserted into the measuring plate and is limited by the angle positioning block and the length positioning block. When disassembling, rotating the angle positioning block and the length positioning block allows the arc rail to be removed from the top, facilitating disassembly and storage. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the appearance of this utility model;

[0009] Figure 2 This is a schematic diagram of the appearance of the extension plate of this utility model;

[0010] Figure 3 This utility model Figure 1 A top-view structural diagram;

[0011] Figure 4 This utility model Figure 1 A front view structural diagram;

[0012] Figure 5 This utility model Figure 1 A schematic diagram of the side view structure;

[0013] Figure 6 This utility model Figure 1 A schematic diagram of the structure viewed from below;

[0014] Figure 7 This utility model Figure 2 Schematic diagram of the cross section of AA;

[0015] In the picture:

[0016] 10. Fixing box; 11. Measuring plate; 12. Scale groove; 13. Push block; 14. Extension plate; 15. Cavity; 16. Two-way screw; 17. Threaded slider; 18. Hinge rod; 19. Support plate; 20. Angle positioning block; 21. Length positioning block; 22. Arc rail; 23. Arc groove; 24. Slide groove. Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. Example

[0019] Reference Figures 1-7 According to an embodiment of the present invention, a measuring tool for road and bridge construction includes a fixed box 10. A measuring plate 11 is rotatably connected to the left end of the fixed box 10. Two symmetrical arc rails 22 are provided on the right end of the fixed box 10. The arc rails 22 are slotted and locked onto the measuring plate 11. The measuring plate 11 and the two arc rails 22 are slidably engaged. An extension plate 14 is slidably connected inside the measuring plate 11. A sliding groove is provided at the upper end of the measuring plate 11. A sliding push block 13 is provided on the sliding groove and is connected to the extension plate 14. A limiting plate is fixed at the rear end of the extension plate 14. A scale groove 12 is provided on the upper surface of both the measuring plate 11 and the extension plate 14. An arc groove 23 is provided on both arc rails 22. An angle positioning block 20 is threadedly connected to the left and right ends of the measuring plate 11 respectively. The length positioning block 21 and the angle positioning block 20 are respectively located in the two arc rails 22. The left end of the extension plate 14 is provided with a slide groove 24. The lower end of the fixed box 10 is provided with two symmetrical cavities 15. The fixed box 10 is rotatably connected with a bidirectional screw 16. The front and rear ends of the bidirectional screw 16 have opposite threads. The bidirectional screw 16 extends backward and passes through the fixed box 10. The rear end of the bidirectional screw 16 is fixed with a turntable. The outer periphery of the bidirectional screw 16 is threaded with two symmetrical threaded sliders 17. The two threaded sliders 17 and the two cavities 15 are connected with hinge rods 18. The hinge rods 18 are hinged in three sections. Each set of hinge rods 18 is connected with two support plates 19. The rotational connection position between the fixed box 10 and the measuring plate 11 is coaxial with the arc rail 22.

[0020] Place the fixed box 10 with its lower end facing down against the ground. By rotating the turntable at the rear end of the fixed box 10, the bidirectional screw 16 is rotated. Under the reverse threads at the front and rear ends of the bidirectional screw 16, the two threaded sliders 17 are driven away from each other, thereby pushing the hinge rod 18 connected to the threaded slider 17 and the cavity 15 outward, so that the hinge rod 18 extends to the outer end of the cavity 15. The lower end of the support plate 19 then abuts against the ground. When storing, rotate the turntable in the opposite direction, and control the two threaded sliders 17 to move closer together through the bidirectional screw 16, so that the hinge rod 18 retracts into the cavity 15. Figure 7 As shown, by pushing the push block 13, the extension plate 14 connected to the lower end of the push block 13 is moved back and forth. The extension plate 14 is fixed at the rear end and abuts against the measuring plate 11 to limit the movement. Pushing the push block 13 controls the extension plate 14 to move backward, increasing the overall measurement length. The length is obtained by the measuring plate 11 and the extension plate 14. By rotating the length positioning block 21, the length positioning block 21 is rotated inward through the threaded connection, so that the length positioning block 21 is in close contact with the side wall of the slide groove 24 at the extension plate 14, restricting the forward and backward movement of the extension plate 14. The measuring plate 11 is rotated by pushing the angle positioning block 20 to rotate. The measuring plate 11 rotates up and down around the rotating rod connected at the fixed box 10 as the rotation axis. The angle positioning block 20 slides circumferentially on the arc rail 22. By rotating the angle positioning block 20, the angle positioning block 20 is rotated inward through the threaded connection, so that the angle positioning block 20 is in close contact with the arc rail 22. The tilt angle at the measuring plate 11 is detected by the arc groove 23 on the arc rail 22.

[0021] Those skilled in the art will appreciate that various modifications to the above embodiments can be made without departing from the overall spirit and concept of this utility model. All such modifications fall within the protection scope of this utility model. The protection scheme of this utility model is defined by the appended claims.

Claims

1. A measuring ruler for road and bridge construction, comprising a fixing box (10), characterized in that: The left end portion of the fixing box (10) is rotatably connected to the measuring plate (11), and the right end portion of the fixing box (10) is provided with two left-right symmetrical arc rails (22), the arc rails (22) being slot-engaged on the measuring plate (11), an extension plate (14) being slidably connected inside the measuring plate (11), the upper end surfaces of the measuring plate (11) and the extension plate (14) being provided with a scale groove (12), the two arc rails (22) being provided with an arc groove (23), the left and right ends of the measuring plate (11) being respectively threadedly connected with an angle positioning block (20) and a length positioning block (21), the angle positioning block (20) and the length positioning block (21) being respectively located inside the two arc rails (22), and a slide groove (24) being provided at the left end of the extension plate (14).

2. A detection ruler for road and bridge construction according to claim 1, characterized in that: The lower end of the fixing box (10) is provided with two front-to-back symmetrical openings (15), and a bidirectional screw (16) is rotatably connected to the fixing box (10). The front and rear ends of the bidirectional screw (16) have opposite threads. The bidirectional screw (16) extends backward and penetrates the fixing box (10). A rotating disk is fixedly provided at the rear end of the bidirectional screw (16). Two front-to-back symmetrical threaded sliders (17) are threadedly connected to the outer periphery of the bidirectional screw (16). A hinged rod (18) is connected between the two threaded sliders (17) and the two openings (15). The hinged rod (18) is hingedly arranged in three sections, and each group of the hinged rods (18) is connected to two support plates (19).

3. A detection ruler for road and bridge construction according to claim 2, characterized in that: A slide groove is provided at the upper end of the measuring plate (11), and a push block (13) capable of sliding forward and backward is provided on the slide groove. The push block (13) is connected to the extension plate (14), and a limit plate is fixedly provided at the rear end of the extension plate (14).

4. A detection ruler for road and bridge construction according to claim 3, characterized in that: The measuring plate (11) is in sliding cooperation with the two arc rails (22).

5. A detection ruler for road and bridge construction according to claim 4, characterized in that: The rotational connection position between the fixing box (10) and the measuring plate (11) is coaxially arranged with the arc track (22).

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