Highway bridge gap detection ruler convenient to stretch out and draw back

Abstract

The utility model provides a highway bridge gap detection ruler convenient to stretch out and draw back, which comprises a ruler body, one end of the ruler body and one end of a vernier are both provided with measuring claws, the opposite surfaces of the two measuring claws are both recessed to form positioning grooves, positioning parts are inserted in the positioning grooves, one side surface of each positioning part is provided with a connecting part attached to the side surface of the corresponding measuring claw, and the other side surface of each positioning part is provided with a clamping part. A penetrating hole is formed in the face, facing the measuring claw, of the connecting part, a round hole aligned with the penetrating hole is formed in the area, covered by the connecting part, of the measuring claw, a connecting screw is inserted into a channel formed by the penetrating hole and the round hole, and one end of the connecting screw is in threaded connection with a nut. The beneficial effects of the utility model are that the vernier caliper is improved on the basis of the structure of an original vernier caliper so as to be suitable for the detection of narrow highway bridge gaps, the vernier caliper does not need to be customized independently, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model is a telescopic gauge for detecting gaps in highway bridges, belonging to the field of highway bridge gap detection technology. Background Technology

[0002] Vernier calipers are commonly used tools for inspecting gaps in highway bridges. By inspecting these gaps, they provide crucial data for bridge defect assessment, construction quality acceptance, and maintenance decisions. Vernier calipers consist of inner and outer measuring jaws, which work together to achieve the measurement function. However, for inspecting narrow highway bridge gaps, the existing measuring jaws are relatively wide, making it difficult to reach deep into the narrow gaps. To meet measurement requirements, the shape of the measuring jaws needs to be modified, which necessitates custom-made vernier calipers, thus increasing manufacturing costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a telescopic highway bridge gap inspection ruler to solve the problems mentioned in the background. This invention improves upon the structure of the original vernier caliper to make it suitable for inspecting narrow highway bridge gaps, eliminating the need for a separately customized vernier caliper and reducing manufacturing costs.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a retractable highway bridge gap detection ruler, comprising a ruler body, a vernier slidably connected to the ruler body, measuring claws installed at one end of the ruler body and one end of the vernier, positioning grooves formed by recesses on the opposing surfaces of the two measuring claws, a positioning part inserted in the positioning groove, a connecting part fitted to the side of the measuring claw on one side of the positioning part, a through hole on the side of the connecting part facing the measuring claw, a circular hole aligned with the through hole in the area of ​​the measuring claw covered by the connecting part, a connecting screw inserted in the channel formed by the through hole and the circular hole, a nut threadedly connected to one end of the connecting screw, and a flat plate for insertion into the gap on the side of the positioning part away from the ruler body.

[0005] Furthermore, the vernier has a threaded hole on the side away from the measuring jaw, and a positioning screw for limiting the relative position of the vernier and the scale body is threaded into the threaded hole.

[0006] Furthermore, a strip groove is provided on one side of the ruler body, which is arranged along the length of the ruler body. The end of the strip groove away from the measuring claw on the ruler body is open. A depth gauge is inserted in the strip groove, and one end of the depth gauge is connected and fixed to the vernier.

[0007] Furthermore, the notch of the strip groove is provided with a pressure plate, which slides in contact with the depth gauge, and both ends of the pressure plate are connected to the gauge body by screws.

[0008] Furthermore, a lug plate is provided on the side of the circular hole away from the connecting part to limit the position of the nut. One end of the lug plate is connected and fixed to the positioning part. There is a gap between the lug plate and the measuring claw. One side of the lug plate has a through hole that is aligned with the circular hole. One end of the connecting screw passes through the through hole, the circular hole and the through hole in sequence and is then threaded with a nut.

[0009] Furthermore, the flat plate portion and the positioning portion are integrally formed, the connecting portion and the positioning portion are integrally formed, and the connecting portion and the positioning portion are arranged perpendicular to each other.

[0010] Furthermore, the opposing surfaces of the two flat plate portions are all machined with bevels, the opposing back surfaces of the two flat plate portions are both flat, and the flat surfaces of the two flat plate portions are parallel to each other.

[0011] The beneficial effects of this utility model are:

[0012] 1. Adjust the position of the vernier on the ruler body, thereby changing the distance between the two mating measuring jaws. At the same time, the depth gauge moves along the groove, thus creating a telescoping relationship between the depth gauge and the ruler body, making it easier to measure the depth of the crack using the depth gauge.

[0013] 2. The flat plate part cooperates with the positioning groove of the measuring claw through the positioning part and the connecting part, and the fastener formed by the connecting screw and nut keeps the relative position of the flat plate part and the measuring claw unchanged, so as to facilitate easy installation or disassembly. It can be assembled on the measuring claw and can be inserted into the narrow cracks of highway bridges. It is an improvement on the original vernier caliper structure to be suitable for the detection of narrow highway bridge gaps, without the need for a separate custom vernier caliper, thus reducing manufacturing costs.

[0014] 3. The positioning part is inserted into the positioning groove, so that the positioning part and the positioning groove cooperate with each other, and the flat plate part and the measuring claw form a snap-fit ​​relationship. There is no need to use at least two fasteners consisting of connecting screws and nuts to prevent the flat plate part from tilting, thus reducing the amount of fasteners used.

[0015] 4. After passing one end of the connecting screw through the connecting part, measuring claw, and ear plate in sequence, tighten the nut. Since there is a gap between the ear plate and the measuring claw, if the nut and the connecting screw cannot be properly separated, the connecting screw can be cut off using the gap between the ear plate and the measuring claw. This allows the flat plate to be disassembled without damaging the flat plate or the measuring claw. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a telescopic highway bridge gap detection ruler according to the present invention.

[0018] Figure 2 This is another perspective view of the telescopic highway bridge gap detection ruler of this utility model;

[0019] Figure 3 This is a schematic diagram of the assembly of the measuring jaws, vernier and ruler body in a telescopic highway bridge gap detection ruler of this utility model;

[0020] Figure 4 This is an assembly diagram of the flat plate, ear plate, connecting part and positioning part of the telescopic highway bridge gap detection ruler of this utility model;

[0021] Figure 5 This is another perspective assembly diagram of the flat plate, ear plate, connecting part and positioning part of the telescopic highway bridge gap detection ruler of this utility model;

[0022] In the diagram: 1-Scale body, 2-Vernier, 3-Measuring jaw, 4-Flat plate, 5-Connecting part, 6-Connecting screw, 7-Positioning screw, 8-Depth gauge, 9-Positioning part, 10-Ear plate, 11-Nut, 12-Positioning groove, 13-Round hole, 14-Through hole, 15-Through hole, 16-Bevel. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1-3This utility model provides a technical solution: a retractable highway bridge gap inspection ruler, including a ruler body 1, a vernier 2 slidably connected to the ruler body 1, measuring claws 3 installed at one end of the ruler body 1 and one end of the vernier 2, a threaded hole on the side of the vernier 2 away from the measuring claws 3, a positioning screw 7 for limiting the relative position of the vernier 2 and the ruler body 1 is threaded into the threaded hole, tightening the positioning screw 7 facilitates limiting the relative position of the vernier 2 and the ruler body 1, a strip groove arranged along the length of the ruler body 1 is opened on one side of the ruler body 1, the strip groove is away from the measuring claws 3 on the ruler body 1. One end of the measuring jaw 3 is open, and a depth gauge 8 is inserted in the strip groove. One end of the depth gauge 8 is connected and fixed to the vernier 2. A pressure plate is provided at the notch of the strip groove. The pressure plate slides in contact with the depth gauge 8. Both ends of the pressure plate are connected to the scale body 1 by screws. The design of the pressure plate improves the stability of the connection between the depth gauge 8 and the scale body 1. By adjusting the sliding position of the vernier 2 on the scale body 1, the distance between the two mating measuring jaws 3 can be changed. At the same time, the depth gauge 8 moves synchronously along the strip groove of the scale body 1, so that the depth gauge 8 and the scale body 1 form a telescopic structure, thereby conveniently using the depth gauge 8 to measure the crack depth.

[0025] See Figures 1-5 The two measuring claws 3 have recessed surfaces to form positioning grooves 12. A positioning part 9 is inserted into the positioning groove 12. A connecting part 5 that fits against the side of the measuring claw 3 is installed on one side of the positioning part 9. A through hole 14 is opened on the side of the connecting part 5 facing the measuring claw 3. A round hole 13 that is aligned with the through hole 14 is opened in the area of ​​the measuring claw 3 covered by the connecting part 5. A connecting screw 6 is inserted in the channel formed by the through hole 14 and the round hole 13. A nut 11 is threaded to one end of the connecting screw 6. A flat plate part 4 for insertion into the gap is installed on the side of the positioning part 9 away from the ruler body 1. The flat plate part 4 and the positioning part 9 are integrally formed. The connecting part 5 and the positioning part 9 are integrally formed. The connecting part 5 and the positioning part 9 are arranged perpendicular to each other. The two flat plate parts 4 have beveled surfaces on their opposing surfaces. 16. Both flat plate parts 4 have flat back surfaces, and the flat surfaces of the two flat plate parts 4 are parallel to each other. The flat plate parts 4 are engaged with the positioning groove 12 of the measuring claw 3 by the positioning part 9 and the connecting part 5, and are fixed by fasteners formed by the connecting screws 6 and nuts 11, so that the flat plate parts 4 and the measuring claw 3 maintain a constant relative position, which can be easily installed or disassembled. This allows the measuring claw 3 to be assembled into a component that can be inserted into narrow road bridge cracks. It is an improvement on the original vernier caliper structure to be suitable for narrow gap detection, without the need for separate customization, thus reducing manufacturing costs. The positioning part 9 is inserted into the positioning groove 12, and the two cooperate with each other to form a snap-fit ​​relationship between the flat plate parts 4 and the measuring claw 3. There is no need for at least two fasteners formed by the connecting screws 6 and nuts 11 to prevent the flat plate parts 4 from tilting, thus reducing the amount of fasteners used.

[0026] See Figures 1-5A lug 10 for limiting the position of the nut 11 is provided on the side of the round hole 13 away from the connecting part 5. One end of the lug 10 is connected and fixed to the positioning part 9. There is a gap between the lug 10 and the measuring claw 3. One side of the lug 10 has a through hole 15 that is aligned with the round hole 13. One end of the connecting screw 6 passes through the through hole 14, the round hole 13 and the through hole 15 in sequence and is threaded to the nut 11. One end of the connecting screw 6 passes through the connecting part 5, the measuring claw 3 and the lug 10 in sequence and is screwed into the nut 11. Since there is a gap between the lug 10 and the measuring claw 3, when the nut 11 and the connecting screw 6 cannot be disassembled normally due to corrosion or other reasons, the connecting screw 6 can be cut off by using this gap, so as to complete the disassembly without damaging the flat plate part 4 and the measuring claw 3.

[0027] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A telescopic gauge for detecting gaps in highway bridges, comprising a gauge body (1), characterized in that: A vernier (2) is fitted onto the ruler (1) and slidably connected to it. A measuring claw (3) is installed at one end of the ruler (1) and at one end of the vernier (2). The two measuring claws (3) are recessed on opposite sides to form a positioning groove (12). A positioning part (9) is inserted into the positioning groove (12). A connecting part (5) that fits against the side of the measuring claw (3) is installed on one side of the positioning part (9). A through hole (14) is opened on the side of the connecting part (5) facing the measuring claw (3). A round hole (13) that is aligned with the through hole (14) is opened in the area of ​​the measuring claw (3) covered by the connecting part (5). A connecting screw (6) is inserted into the channel formed by the through hole (14) and the round hole (13). A nut (11) is threaded onto one end of the connecting screw (6). A flat plate part (4) for insertion into the gap is installed on the side of the positioning part (9) away from the ruler (1).

2. The easily extendable highway bridge gap inspection ruler according to claim 1, characterized in that: The vernier (2) has a threaded hole on the side away from the measuring claw (3), and a positioning screw (7) for limiting the relative position of the vernier (2) and the ruler (1) is threaded into the threaded hole.

3. The easily extendable highway bridge gap inspection ruler according to claim 1, characterized in that: The ruler body (1) has a strip groove arranged along the length of the ruler body (1) on one side. The end of the strip groove away from the measuring claw (3) on the ruler body (1) is open. A depth gauge (8) is inserted in the strip groove. One end of the depth gauge (8) is connected and fixed to the vernier (2).

4. The easily extendable highway bridge gap inspection ruler according to claim 3, characterized in that: The notch of the groove is provided with a pressure plate, which slides in contact with the depth gauge (8). Both ends of the pressure plate are connected to the gauge body (1) by screws.

5. A telescopic highway bridge gap inspection ruler according to claim 1, characterized in that: The round hole (13) is provided with an ear plate (10) on the side away from the connecting part (5) for limiting the position of the nut (11). One end of the ear plate (10) is connected and fixed to the positioning part (9). There is a gap between the ear plate (10) and the measuring claw (3). One side of the ear plate (10) is provided with a through hole (15) that is aligned with the round hole (13). One end of the connecting screw (6) passes through the through hole (14), the round hole (13) and the through hole (15) in sequence and is threaded to the nut (11).

6. The easily extendable highway bridge gap inspection ruler according to claim 1, characterized in that: The flat plate part (4) and the positioning part (9) are integrally formed, the connecting part (5) and the positioning part (9) are integrally formed, and the connecting part (5) and the positioning part (9) are arranged perpendicular to each other.

7. The easily extendable highway bridge gap inspection ruler according to claim 1, characterized in that: Both of the two flat plate portions (4) have beveled surfaces (16) on their opposite sides. Both of the two flat plate portions (4) have flat surfaces on their opposite sides, and the flat surfaces of the two flat plate portions (4) are parallel to each other.

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