Building detection ruler for constructional engineering

Abstract

The utility model relates to the technical field of buildings, in particular to a building detection ruler for constructional engineering. Comprising a first measuring scale, a second measuring scale is arranged at one end of the first measuring scale, a third measuring scale is arranged at the other end of the first measuring scale, a fourth measuring scale is arranged at one end of the third measuring scale, and first positioning grooves are formed in the two ends of the tops of the first measuring scale and the third measuring scale; the tops of the adjacent ends of the second measuring scale and the fourth measuring scale are also internally provided with first positioning grooves, and a positioning piece is installed between every two adjacent first positioning grooves. According to the building detection ruler for constructional engineering provided by the utility model, through cooperation of the first measuring ruler, the second measuring ruler, the third measuring ruler, the fourth measuring ruler and the positioning piece, the detection ruler can be integrally folded when not in use, and after the first measuring ruler, the second measuring ruler, the third measuring ruler and the fourth measuring ruler are folded, the detection ruler can be conveniently folded. And positioning is carried out through the positioning piece and the limiting piece, so that carrying or storage is convenient.

Description

Technical Field

[0001] This utility model relates to the field of building technology, and in particular to a building inspection ruler for building engineering. Background Technology

[0002] Construction quality refers to the comprehensive requirements for the safety, applicability, economy, environmental protection, and aesthetics of a project, as stipulated in current national laws, regulations, technical standards, design documents, and contracts. Generally, any large or medium-sized construction project can be divided into several levels. For example, according to national standards, building construction projects can be divided into unit projects, sub-projects, itemized projects, and inspection batches; while projects such as water conservancy and hydropower, and port and transportation projects can be divided into single projects, unit projects, sub-projects, and itemized projects. The relationships between these components follow a logical sequence of construction. Clearly, quality control during construction is the most fundamental aspect of quality control, determining the quality of relevant inspection batches. The quality of inspection batches, in turn, determines the quality of sub-projects; the quality of sub-projects determines the quality of sub-sections; the quality of sub-sections determines the quality of the entire project; and the quality of the entire project determines the quality of the whole project. As one type of quality inspection tool, the construction quality inspection ruler is mainly used for the construction and completion quality inspection of engineering projects such as building construction, decoration, bridge construction, and equipment installation. Measurements taken with the quality inspection ruler provide an intuitive understanding and judgment of the quality of a construction project.

[0003] Patent document CN219551335U discloses a building inspection ruler for construction engineering testing. The ruler includes a main body with a storage slot on one side and a positioning slot at the opening of the storage slot. A hinged cover is fitted inside the positioning slot. A measuring component is mounted on one side of the main body, comprising a fixing block and a counterweight block. A connecting block is fixedly connected to the top of the fixing block. This design addresses the shortcomings of existing technologies by adding the function of determining whether a wall is perpendicular to the ground, which is more accurate than direct visual inspection. It also meets the diverse needs of users and facilitates operation. Furthermore, the measuring component is detachable; when it is not needed to determine whether a wall is perpendicular to the ground, the user can store the various parts of the measuring component in the storage slot for easy portability.

[0004] When using the above technology, the following technical problems were found in the existing technology: the existing measuring ruler is not convenient to carry when used. Therefore, a building inspection ruler for construction engineering is designed to provide another technical solution to the above technical problems. Utility Model Content

[0005] Therefore, it is necessary to provide a building inspection ruler for construction engineering to address the above-mentioned technical problems, thereby solving the technical problem that existing measuring rulers are inconvenient to carry when in use.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A construction inspection ruler for building engineering includes a first measuring ruler, a second measuring ruler at one end of the first measuring ruler, a third measuring ruler at the other end of the first measuring ruler, and a fourth measuring ruler at one end of the third measuring ruler. First positioning grooves are formed inside the top ends of the first and third measuring rulers. First positioning grooves are also formed inside the top of adjacent ends of the second and fourth measuring rulers. A positioning element is installed between two adjacent first positioning grooves. Second positioning grooves are formed inside the top of adjacent ends of the first and second measuring rulers, and second positioning grooves are also formed inside the top of adjacent ends of the third and fourth measuring rulers.

[0008] In a preferred embodiment of the building inspection ruler for building engineering provided by this utility model, a first connecting plate is rotatably connected to the bottom of the first measuring ruler near the end of the second measuring ruler, and one end of the first connecting plate is rotatably connected to the second measuring ruler. The bottom of the third measuring ruler and the fourth measuring ruler adjacent to each other is also rotatably connected to the first connecting plate.

[0009] In a preferred embodiment of the building inspection ruler for building engineering provided by this utility model, a second connecting plate is rotatably connected to the middle of the adjacent ends of the first measuring ruler and the third measuring ruler.

[0010] In a preferred embodiment of the building inspection ruler for building engineering provided by this utility model, the positioning component includes a first positioning plate, a second positioning plate, and an adjusting bolt. The second positioning plate is slidably connected to one end of the first positioning plate. The first positioning plate is slidably connected to the first positioning groove, the first positioning plate is slidably connected to the second positioning groove, the second positioning plate is slidably connected to the first positioning groove, and the second positioning plate is slidably connected to the second positioning groove. The adjusting bolt is rotatably connected to the inside of the top end of the first positioning plate, and the outer side of one end of the adjusting bolt is threadedly connected to the second positioning plate.

[0011] In a preferred embodiment of the building inspection ruler for construction engineering provided by this utility model, a first limiting groove is provided inside the top of the first measuring ruler near the end of the third measuring ruler, and a second limiting groove is provided inside the end of the third measuring ruler near the first measuring ruler and at a position corresponding to the first limiting groove. A limiting component is installed inside the first limiting groove. The limiting component includes a limiting frame, a tension spring, and a tension groove. The limiting frame is slidably connected to the first limiting groove and to the second limiting groove. A tension spring is fixed to the bottom of one end of the limiting frame and is fixed to the first limiting groove.

[0012] In a preferred embodiment of the building inspection ruler for building engineering provided by this utility model, a groove is provided inside the top of the limiting frame.

[0013] In a preferred embodiment of the building inspection ruler for construction engineering provided by this utility model, the first, second, third, and fourth measuring rulers can all be composed of a first splicing plate, a second splicing plate, an extension plate, an assembly plate, and countersunk bolts. A second splicing plate is provided at one end of the first splicing plate, and multiple extension plates are slidably connected between the first and second splicing plates. An assembly protrusion is fixed at the end of the second splicing plate and the extension plates near the first splicing plate. An assembly groove is provided inside the first and second splicing plates at the end near the second splicing plate. An assembly plate is slidably connected inside one side of the first splicing plate, the second splicing plate, and the extension plate. Countersunk bolts are slidably connected inside both ends of the assembly plate. The countersunk bolts are threadedly connected to the second splicing plate and to the first splicing plate.

[0014] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0015] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0016] This utility model provides a building inspection ruler for construction engineering. Through the cooperation of a first measuring ruler, a second measuring ruler, a third measuring ruler, a fourth measuring ruler and a positioning component, the inspection ruler can be folded as a whole when not in use. After the first measuring ruler, the second measuring ruler, the third measuring ruler and the fourth measuring ruler are folded, they are positioned by the positioning component and the limiting component, so as to facilitate carrying or storage.

[0017] Through the cooperation of the first limiting groove, the limiting frame, the tension spring, the tension groove, and the second limiting groove, the first measuring ruler and the third measuring ruler are folded together through the second connecting plate, allowing the limiting frame to rise inside the first limiting groove and drive the tension spring to stretch, causing the limiting frame to rotate 90 degrees inside the first limiting groove, so that one end of the limiting frame enters the second limiting groove from inside the first limiting groove, completing the close positioning between the first measuring ruler and the third measuring ruler.

[0018] Through the cooperation of multiple second connecting plates, multiple first positioning slots and positioning components, the first measuring ruler, the second measuring ruler, the third measuring ruler and the fourth measuring ruler can be aligned in a straight line for measurement. At this time, the first measuring ruler and the second measuring ruler, the first measuring ruler and the third measuring ruler, and the third measuring ruler and the fourth measuring ruler are all positioned by the cooperation of the positioning component and the first positioning slot. When the second measuring ruler and the first measuring ruler are folded together, and the third measuring ruler and the fourth measuring ruler are folded together, the first measuring ruler and the second measuring ruler, and the third measuring ruler and the fourth measuring ruler are all positioned by the cooperation of the positioning component and the second positioning slot.

[0019] The cooperation of the first positioning plate, the second positioning plate and the adjusting bolt allows the adjusting bolt to rotate inside the first positioning plate, thereby adjusting the distance between the first positioning plate and the second positioning plate, and thus adjusting the tightness inside the corresponding two first positioning slots or two second positioning slots.

[0020] By using the first splicing plate, the second splicing plate, the extension plate, the assembly plate, and the countersunk bolts, the first, second, third, or fourth measuring ruler can be lengthened or shortened according to the length requirements during use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present utility model;

[0023] Figure 2 This is a folding diagram of the first embodiment of the present invention;

[0024] Figure 3 This is an exploded view of the structure of the first embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the first measuring ruler of this utility model;

[0026] Figure 5 This is a schematic diagram of the internal structure of the third measuring ruler of this utility model;

[0027] Figure 6 This is a schematic diagram of the positioning component of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0029] Figure 8 This is an exploded view of the structure of the second embodiment of the present invention.

[0030] In the diagram: 1. First measuring ruler; 2. Second measuring ruler; 3. Third measuring ruler; 4. Fourth measuring ruler; 5. Positioning component; 6. Limiting component; 7. First connecting plate; 8. Second connecting plate; 9. First positioning groove; 10. Second positioning groove; 11. First limiting groove; 12. Limiting frame; 13. Tension spring; 14. Pull groove; 15. Second limiting groove; 16. First positioning plate; 17. Second positioning plate; 18. Adjusting bolt; 19. First splicing plate; 20. Second splicing plate; 21. Extension plate; 22. Assembly plate; 23. Countersunk bolt; 24. Assembly protrusion; 25. Assembly groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Example 1

[0036] Reference Figures 1-6A construction inspection ruler for building engineering includes a first measuring ruler 1, a second measuring ruler 2 at one end of the first measuring ruler 1, a first connecting plate 7 rotatably connected to the bottom of the first measuring ruler 1 near the second measuring ruler 2, one end of the first connecting plate 7 rotatably connected to the second measuring ruler 2, and rounded bottom edges at the adjacent ends of the first measuring ruler 1 and the second measuring ruler 2, allowing for assisted folding and unfolding between the first measuring ruler 1 and the second measuring ruler 2 via a positioning element 5. A third measuring ruler 3 is provided at the other end of the first measuring ruler 1, and rounded bottom edges at one side of the adjacent ends of the first measuring ruler 1 and the third measuring ruler 3. A second connecting plate 8 rotatably connects to the middle of the adjacent ends of the first measuring ruler 1 and the third measuring ruler 3, allowing for centering of the first measuring ruler 1 and the third measuring ruler 3 via the second connecting plate 8. The third measuring ruler 3 is folded, and a fourth measuring ruler 4 is provided at one end. At the same time, the bottom of the adjacent ends of the third measuring ruler 3 and the fourth measuring ruler 4 are rounded. The bottom of the adjacent ends of the third measuring ruler 3 and the fourth measuring ruler 4 are also rotatably connected to the first connecting plate 7, so that the third measuring ruler 3 and the fourth measuring ruler 4 can be folded and opened through the first connecting plate 7. This allows the bottom of the first measuring ruler 1 and the second measuring ruler 2 to contact the bottom of the second measuring ruler 2 through the folding of the first connecting plate 7. Similarly, the bottom of the fourth measuring ruler 4 contacts the bottom of the third measuring ruler 3. Then, the first measuring ruler 1 and the third measuring ruler 3 are folded in half through the second connecting plate 8, so that one side of the first measuring ruler 1 and the third measuring ruler 3 contacts, while the second measuring ruler 2 and the fourth measuring ruler 4 also contact each other.

[0037] First positioning grooves 9 are provided inside the top ends of the first measuring ruler 1 and the third measuring ruler 3. First positioning grooves 9 are also provided inside the top of the adjacent ends of the second measuring ruler 2 and the fourth measuring ruler 4. Positioning components 5 are installed between two adjacent first positioning grooves 9. So that after the first measuring ruler 1 and the second measuring ruler 2, the first measuring ruler 1 and the third measuring ruler 3, and the third measuring ruler 3 and the fourth measuring ruler 4 are unfolded, the positioning components 5 enter the interior of the two adjacent first positioning grooves 9 to complete the positioning. Second positioning grooves 10 are provided inside the top of the adjacent ends of the first measuring ruler 1 and the second measuring ruler 2. Second positioning grooves 10 are also provided inside the top of the adjacent ends of the third measuring ruler 3 and the fourth measuring ruler 4. So that after the first measuring ruler 1 and the second measuring ruler 2 are folded, and the third measuring ruler 3 and the fourth measuring ruler 4 are folded, the positioning components 5 enter the interior of the corresponding two second positioning grooves 10 to complete the positioning after folding.

[0038] The positioning component 5 includes a first positioning plate 16, a second positioning plate 17, and an adjusting bolt 18. Both the first positioning plate 16 and the second positioning plate 17 are U-shaped. One end of the first positioning plate 16 is slidably connected to the second positioning plate 17, so that the distance between the first positioning plate 16 and the second positioning plate 17 can be adjusted. The first positioning plate 16 is slidably connected to the first positioning groove 9, the first positioning plate 16 is slidably connected to the second positioning groove 10, the second positioning plate 17 is slidably connected to the first positioning groove 9, and the second positioning plate 17 is slidably connected to the second positioning groove 10. The second positioning plate 16 can be installed inside the first positioning groove 9 or the second positioning groove 10 through the second limiting groove 15 formed by the first positioning plate 16 and the second positioning plate 17. The adjusting bolt 18 is rotatably connected to the inside of the top end of the first positioning plate 16. The outer side of one end of the adjusting bolt 18 is threadedly connected to the second positioning plate 17, so that the distance between the second positioning plate 17 and the first positioning plate 16 can be adjusted by rotating the adjusting bolt 18 on the outer side of the first positioning plate 16.

[0039] A first limiting groove 11 is formed inside the top of the first measuring ruler 1 near the end of the third measuring ruler 3. A second limiting groove 15 is formed inside the third measuring ruler 3 near the end of the first measuring ruler 1, corresponding to the first limiting groove 11. A limiting member 6 is installed inside the first limiting groove 11, so that after the limiting member 6 enters the second limiting groove 15 from inside the first limiting groove 11, it can limit the state of the first measuring ruler 1 and the third measuring ruler 3 after they are folded by the second connecting plate 8. The limiting member 6 includes a limiting frame 12, a tension spring 13, and a tension groove 14. The frame 12 is slidably connected to the first limiting groove 11 and to the second limiting groove 15. The limiting frame 12 can rise inside the first limiting groove 11 and then rotate to a certain extent. A tension spring 13 is fixed to the bottom of one end of the limiting frame 12. The tension spring 13 is fixed to the first limiting groove 11, so that the rise of the limiting frame 12 inside the first limiting groove 11 causes the tension spring 13 to be stretched. At the same time, the bottom of both ends of the limiting frame 12 is cylindrical. A groove 14 is opened inside the top of the limiting frame 12, which allows the user to raise the limiting frame 12 through the groove 14.

[0040] The following is the usage process of the building inspection ruler for construction engineering provided by this utility model: When in use, the first measuring ruler 1, the second measuring ruler 2, the third measuring ruler 3 and the fourth measuring ruler 4 are opened to form a straight line. Then, the tops of the first measuring ruler 1 and the second measuring ruler 2, the third measuring ruler 3 and the first measuring ruler 1, and the third measuring ruler 3 and the fourth measuring ruler 4 are positioned by the positioning member 5. At this time, the first positioning plate 16 and the second positioning plate 17 in the positioning member 5 are respectively inserted into the two adjacent first positioning grooves 9. By rotating the adjusting bolt 18 on the top of the first positioning plate 16, the distance between the first positioning plate 16 and the second positioning plate 17 is tightened to complete the positioning. Then the inspection ruler can be used.

[0041] When folding is required, reverse the adjusting bolt 18 in the positioning piece 5 to increase the distance between the first positioning plate 16 and the second positioning plate 17, thereby removing the positioning piece 5. Then, rotate the second measuring ruler 2 between the first connecting plate 7 and the first measuring ruler 1 so that one end of the second measuring ruler 2 rotates and the bottom of the second measuring ruler 2 fits against the bottom of the first measuring ruler 1. Then, rotate the fourth measuring ruler 4 and the third measuring ruler 3 together with the first connecting plate 7 so that the bottom of the fourth measuring ruler 4 fits against the bottom of the third measuring ruler 3. Then, fold the first measuring ruler 1 and the third measuring ruler 3 together with the second connecting plate 8. Finally, install the positioning piece 5 on the second positioning groove 10 between the first measuring ruler 1 and the second measuring ruler 2 and on the second positioning groove 10 between the third measuring ruler 3 and the fourth measuring ruler 4 to fix the folded part.

[0042] Simultaneously, the limiting frame 12 is pulled by the pull groove 14, causing the limiting frame 12 to rise and drive the tension spring 13 to stretch. At this time, the limiting frame 12 rises to the appropriate position. Then, the limiting frame 12 is rotated so that the end of the limiting frame 12 without the tension spring 13 enters the inner side of the second limiting groove 15 by rotation. At this time, the limiting frame 12 is released, allowing the limiting frame 12 to rebound and reset after being stretched by the tension spring 13. Thus, the limiting frame 12 limits the folded shape of the first measuring ruler 1 and the third measuring ruler 3, allowing the measuring ruler to be folded when not in use, making it easy to carry and store.

[0043] Example 2

[0044] Reference Figures 7-8 A construction inspection ruler for building engineering includes a first measuring ruler 1, a second measuring ruler 2, a third measuring ruler 3, and a fourth measuring ruler 4, each composed of a first splicing plate 19, a second splicing plate 20, an extension plate 21, an assembly plate 22, and countersunk bolts 23. One end of the first splicing plate 19 is provided with the second splicing plate 20. Multiple extension plates 21 are slidably connected between the first splicing plate 19 and the second splicing plate 20. The inspection scale of each extension plate 21 is consistent and is an integer, thus allowing the measurement scale to be changed by adjusting the dimensions of the extension plates 21. The quantity is adjusted by measuring the values ​​of the first measuring ruler 1, the second measuring ruler 2, the third measuring ruler 3, and the fourth measuring ruler 4. The second splicing plate 20 and the extension plate 21 are both fixed with mounting protrusions 24 at the ends near the first splicing plate 19. The first splicing plate 19 and the second splicing plate 20 are both provided with mounting grooves 25 at the ends near the second splicing plate 20, so that the extension plate 21 can be slidably assembled between the first splicing plate 19 and the second splicing plate 20 through the cooperation of the mounting protrusions 24 and the mounting grooves 25.

[0045] Assembly plates 22 are slidably connected to the inside of the first splicing plate 19, the second splicing plate 20, and the extension plate 21 on one side. This allows for the selection of assembly plates 22 of different lengths depending on the number of extension plates 21. Countersunk bolts 23 are slidably connected to the inside of both ends of the assembly plates 22, allowing the ends of the countersunk bolts 23 to be hidden inside the assembly plates 22. The countersunk bolts 23 are threadedly connected to the second splicing plate 20 and to the first splicing plate 19, thereby completing the assembly of the assembly plates 22 with the first splicing plate 19 and the second splicing plate 20 through the countersunk bolts 23.

[0046] The following is the usage process of the building inspection ruler for construction engineering provided by this utility model: During use, the inspection dimensions of the first measuring ruler 1, the second measuring ruler 2, the third measuring ruler 3, and the fourth measuring ruler 4 can be adjusted as needed. Different numbers of extension plates 21 can be installed between the first splicing plate 19 and the second splicing plate 20 as needed, allowing the extension plates 21 to be assembled by sliding. At this time, the first splicing plate 19, the second splicing plate 20, and the extension plates 21 can only be adjusted vertically. Then, a sliding assembly plate 22 is installed on one side of the assembled first measuring ruler 1, the second measuring ruler 2, the third measuring ruler 3, and the fourth measuring ruler 4. The vertical sliding is restricted by the assembly plate 22, and the assembly plate 22 is assembled with the first splicing plate 19 and the second splicing plate 20 by countersunk bolts 23, thus realizing the assembly of the first splicing plate 19, the second splicing plate 20, and the extension plates 21.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A building inspection ruler for construction projects, characterized in that, The device includes a first measuring ruler (1), a second measuring ruler (2) at one end of the first measuring ruler (1), a third measuring ruler (3) at the other end of the first measuring ruler (1), and a fourth measuring ruler (4) at one end of the third measuring ruler (3). The top ends of the first measuring ruler (1) and the third measuring ruler (3) are provided with first positioning grooves (9). The tops of the adjacent ends of the second measuring ruler (2) and the fourth measuring ruler (4) are also provided with first positioning grooves (9). A positioning component (5) is installed between two adjacent first positioning grooves (9). The tops of the adjacent ends of the first measuring ruler (1) and the second measuring ruler (2) are provided with second positioning grooves (10). The tops of the adjacent ends of the third measuring ruler (3) and the fourth measuring ruler (4) are also provided with second positioning grooves (10).

2. A building inspection ruler for construction engineering according to claim 1, characterized in that, The bottom of the first measuring ruler (1) near the second measuring ruler (2) is rotatably connected to a first connecting plate (7). One end of the first connecting plate (7) is rotatably connected to the second measuring ruler (2). The bottom of the third measuring ruler (3) and the fourth measuring ruler (4) are also rotatably connected to the first connecting plate (7).

3. A building inspection ruler for construction engineering according to claim 1, characterized in that, A second connecting plate (8) is rotatably connected to the middle of the adjacent ends of the first measuring ruler (1) and the third measuring ruler (3).

4. A building inspection ruler for construction engineering according to claim 1, characterized in that, The positioning component (5) includes a first positioning plate (16), a second positioning plate (17), and an adjusting bolt (18). The second positioning plate (17) is slidably connected to one end of the first positioning plate (16). The first positioning plate (16) is slidably connected to the first positioning groove (9), the first positioning plate (16) is slidably connected to the second positioning groove (10), the second positioning plate (17) is slidably connected to the first positioning groove (9), and the second positioning plate (17) is slidably connected to the second positioning groove (10). The adjusting bolt (18) is rotatably connected to the inside of the top end of the first positioning plate (16). The outer side of one end of the adjusting bolt (18) is threadedly connected to the second positioning plate (17).

5. A building inspection ruler for construction engineering according to claim 1, characterized in that, The first measuring ruler (1) has a first limiting groove (11) inside the top end near the third measuring ruler (3). The third measuring ruler (3) has a second limiting groove (15) inside the top end near the first measuring ruler (1) and at a position corresponding to the first limiting groove (11). A limiting component (6) is installed inside the first limiting groove (11). The limiting component (6) includes a limiting frame (12), a tension spring (13), and a pull groove (14). The limiting frame (12) is slidably connected to the first limiting groove (11) and to the second limiting groove (15). A tension spring (13) is fixed to the bottom of one end of the limiting frame (12). The tension spring (13) is fixed to the first limiting groove (11).

6. A building inspection ruler for construction engineering according to claim 5, characterized in that, The top of the limiting frame (12) has a groove (14) inside.

7. A building inspection ruler for construction engineering according to claim 1, characterized in that, The first measuring ruler (1), the second measuring ruler (2), the third measuring ruler (3), and the fourth measuring ruler (4) can all be composed of a first splicing plate (19), a second splicing plate (20), an extension plate (21), an assembly plate (22), and countersunk bolts (23). One end of the first splicing plate (19) is provided with the second splicing plate (20). Multiple extension plates (21) are slidably connected between the first splicing plate (19) and the second splicing plate (20). The ends of the second splicing plate (20) and the extension plates (21) near the first splicing plate (19) are all The first splicing plate (19) and the second splicing plate (20) are both provided with an assembly groove (25) at the end of the second splicing plate (20). The first splicing plate (19), the second splicing plate (20) and the extension plate (21) are slidably connected to the interior of one side of the extension plate (21). The two ends of the assembly plate (22) are slidably connected to the interior of the countersunk bolts (23). The countersunk bolts (23) are threadedly connected to the second splicing plate (20) and to the first splicing plate (19).

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