A measuring device for detecting a building main structure

Abstract

This utility model discloses a measuring device for inspecting the main structure of a building, relating to the technical field of construction measurement equipment. It includes a measuring mechanism comprising an L-plate, a sliding groove, a slider, and a measuring plate. The sliding groove is located on both sides of the top of the L-plate. This utility model, by incorporating a lighting mechanism and an auxiliary disassembly mechanism, enables the lighting mechanism to clearly illuminate the contact position between the measuring plate and the building structure, while also clearly displaying the scale lines on the front surface of the L-plate. This avoids measurement position judgment errors or incorrect readings due to visual blur. Simultaneously, the auxiliary disassembly mechanism provides convenient support for the assembly and disassembly of the lighting mechanism. This solves the problem that, in dimly lit construction environments lacking lighting, users find it difficult to clearly observe the contact position between the measuring plate and the building structure, and cannot accurately read the scale lines on the front surface of the L-plate, easily leading to measurement position judgment errors or incorrect readings due to visual blur, thus affecting measurement accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building construction measurement equipment technology, specifically a measurement device for detecting the main structure of a building. Background Technology

[0002] Construction engineering refers to the physical engineering project formed through the construction of various types of buildings and their ancillary facilities, as well as the installation of supporting lines, pipelines, and equipment. "Buildings" specifically refer to projects with roofs, beams, columns, walls, foundations, and internal spaces that meet people's needs for production, living, learning, and public activities. During construction, it is usually necessary to measure the thickness of the building's main structure.

[0003] According to announcement number CN221484411U, a measuring device for the main structure of a building is disclosed, relating to the field of building construction measuring equipment. The technical solution includes an L-shaped plate with a groove inside, a slider slidably connected inside the groove, a measuring plate fixedly connected to one side of the slider, a lead screw rotatably connected inside the groove, the lead screw being threadedly connected to the slider, a first bevel gear fixedly connected to one end of the lead screw, a second rotating shaft rotatably connected inside the L-shaped plate, a second bevel gear and a turntable fixedly connected to the outer side of the second rotating shaft, the second bevel gear meshing with the first bevel gear, and graduation lines provided on the front surface of the L-shaped plate. The advantages of this invention are: simple structure, single-handed operation, convenient measurement, easy grip for the user, prevention of slippage between the hand and the device, and improved user comfort.

[0004] Based on the search of the aforementioned patents and the discovery of devices in the existing technology, the aforementioned devices, when used, can solve the problems that users generally use measuring tapes to measure the thickness of the main body of a building, but the measuring method of measuring tapes has a large error, is greatly affected by human factors, and the measuring tape is easy to detach from the human hand during the measurement process, which can cause the device to fall to the ground and cause damage. However, during use, due to the lack of lighting structure, in dimly lit construction environments, users find it difficult to clearly observe the contact position between the measuring board and the building structure. At the same time, they cannot accurately read the scale lines on the front surface of the L-board. Visual blurring can easily lead to deviations in the judgment of the measurement position or incorrect readings, affecting the measurement accuracy and efficiency. Summary of the Invention

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a measuring device for detecting the main structure of a building, which has the advantage of lighting function. This solves the problem that, due to the lack of lighting structure, in a dimly lit construction environment, it is difficult for users to clearly observe the contact position between the measuring plate and the main structure of the building, and at the same time, it is impossible to accurately read the scale lines on the front surface of the L-plate. This can easily lead to deviations in the judgment of the measurement position or incorrect readings due to visual blurring, thus affecting the measurement accuracy and efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a measuring device for inspecting the main structure of a building, comprising a measuring mechanism, wherein the measuring mechanism includes an L-plate, a slide groove, a slider, and a measuring plate, the slide groove being formed on both sides of the top of the L-plate, the slider being movably connected to the inner wall of the slide groove, and the measuring plate being fixedly connected to the top of the slider; and... The lighting mechanism includes connecting grooves on both sides of a measuring plate. Connecting plates are movably connected to the inner walls of the connecting grooves, and lighting plates are fixedly connected to the outer sides of the connecting plates. Disassembly and assembly components are provided at the top of both sides of the measuring plate, and lifting components are provided on both sides of the top of the measuring plate. Auxiliary disassembly mechanism; the auxiliary disassembly mechanism is located on both sides of the inner wall of the connecting groove.

[0007] As a preferred embodiment of this utility model, the disassembly and assembly assembly includes a movable groove, which is opened on the top of both sides of the measuring plate. The inner wall of the movable groove is movably connected with a disassembly and assembly plug. Slots are opened on both sides of the top of the connecting plate, and the bottom of the disassembly and assembly plug is inserted into the inner wall of the slot.

[0008] As a preferred embodiment of this utility model, a guide rod is fixedly connected to the top of the disassembly and assembly block, the top of the guide rod extends through to the top of the measuring plate, and a compression spring is sleeved on the surface of the guide rod. One end of the compression spring is fixedly connected to the top of the disassembly and assembly block, and the other end of the compression spring is fixedly connected to the top of the inner wall of the movable groove.

[0009] In a preferred embodiment of this invention, the lifting assembly includes connecting blocks disposed on both sides of the top of the measuring plate, the connecting blocks being fixedly connected to the surface of the guide rod, and a lifting ring being fixedly connected to the top of the connecting blocks.

[0010] As a preferred embodiment of this utility model, the auxiliary disassembly mechanism includes a receiving groove, which is formed on both sides of the inner wall of the connecting groove. A push spring is provided on the inner wall of the receiving groove. One end of the push spring is fixedly connected to the inner side of the inner wall of the receiving groove, and the other end of the push spring is fixedly connected to a push block. The push block is located on both sides of the inner side of the connecting plate. A limit component is formed on the inner side of the inner wall of the receiving groove.

[0011] As a preferred embodiment of the present invention, the limiting component includes a limiting groove, which is formed on the inner side of the inner wall of the receiving groove. A limiting rod is movably connected to the inner wall of the limiting groove, and the outer side of the limiting rod is fixedly connected to the inner side of the push block.

[0012] As a preferred embodiment of this invention, the top of the measuring plate is provided with a mounting groove, and a bubble level is fixedly connected to the inner wall of the mounting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a lighting mechanism and an auxiliary disassembly mechanism, this utility model enables the lighting mechanism to clearly illuminate the contact position between the measuring plate and the building body, and clearly present the scale lines on the front surface of the L-plate, avoiding measurement position judgment deviations or reading errors caused by visual blur. At the same time, the auxiliary disassembly mechanism provides convenient support for the disassembly and assembly of the lighting mechanism, solving the problem that due to the lack of a lighting structure, in a dimly lit construction environment, users have difficulty clearly observing the contact position between the measuring plate and the building body, and cannot accurately read the scale lines on the front surface of the L-plate, which easily leads to measurement position judgment deviations or reading errors due to visual blur, affecting measurement accuracy and efficiency, thus achieving the effect of lighting function.

[0014] 2. The lighting mechanism of this utility model allows users to work in scenarios such as nighttime construction and indoor dimly lit areas without having to carry additional auxiliary lighting tools such as flashlights and table lamps. It can clearly illuminate the contact position between the measuring board and the building structure, and clearly show the scale lines on the front surface of the L-plate, reducing the cost of carrying tools and operating steps, and significantly improving measurement efficiency.

[0015] 3. The auxiliary disassembly mechanism of this utility model provides a guarantee for the long-term stable use of the lighting mechanism. When the lighting panel runs out of power or the parts are worn out and need to be replaced or maintained, the disassembly and assembly of the lighting panel can be completed quickly without the need for professional tools or complicated operations, avoiding the device from stopping due to lighting panel failure and ensuring that the measurement work can be carried out continuously and smoothly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the measuring plate; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Measuring mechanism; 11. L-plate; 12. Slide groove; 13. Slider; 14. Measuring plate; 2. Lighting mechanism; 21. Connecting groove; 22. Connecting plate; 23. Lighting plate; 24. Disassembly assembly; 241. Movable groove; 242. Disassembly insert; 243. Slot; 25. Lifting assembly; 251. Connecting block; 252. Lifting ring; 3. Auxiliary disassembly mechanism; 31. Receiving groove; 32. Push spring; 33. Push block; 34. Limiting assembly; 341. Limiting groove; 342. Limiting rod; 4. Guide rod; 5. Compression spring; 6. Mounting groove; 7. Bubble level. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] Example 1, referring to Figure 1-3 This is the first embodiment of the present invention, providing a measuring device for inspecting the main structure of a building, including a measuring mechanism 1. The measuring mechanism 1 includes an L-plate 11, a slide groove 12, a slider 13, and a measuring plate 14. The slide groove 12 is formed on both sides of the top of the L-plate 11, the slider 13 is movably connected to the inner wall of the slide groove 12, and the measuring plate 14 is fixedly connected to the top of the slider 13. Lighting mechanism 2; Lighting mechanism 2 includes connecting grooves 21, which are formed on both sides of measuring plate 14. Connecting plates 22 are movably connected to the inner walls of connecting grooves 21, and lighting plates 23 are fixedly connected to the outer sides of connecting plates 22. Disassembly and assembly components 24 are provided on the top of both sides of measuring plate 14, and lifting components 25 are provided on both sides of the top of measuring plate 14. Auxiliary disassembly mechanism 3; the auxiliary disassembly and assembly mechanism is opened on both sides of the inner wall of the connecting groove 21. The disassembly and assembly assembly 24 includes a movable groove 241, which is opened on the top of both sides of the measuring plate 14. The inner wall of the movable groove 241 is movably connected to the disassembly and assembly plug 242. Slots 243 are opened on both sides of the top of the connecting plate 22. The bottom of the disassembly and assembly plug 242 is inserted into the inner wall of the slot 243. The top of the disassembly and assembly plug 242 is fixedly connected to the top of the disassembly and assembly plug 242. The top of the guide rod 4 extends through to the top of the measuring plate 14. A compression spring 5 is fitted on the surface of the measuring plate 14. One end of the compression spring 5 is fixedly connected to the top of the disassembly and assembly block 242, and the other end of the compression spring 5 is fixedly connected to the top of the inner wall of the movable groove 241. The lifting assembly 25 includes a connecting block 251, which is set on both sides of the top of the measuring plate 14. The connecting block 251 is fixedly connected to the surface of the guide rod 4. A lifting ring 252 is fixedly connected to the top of the connecting block 251. An installation groove 6 is opened on the top of the measuring plate 14, and a bubble level 7 is fixedly connected to the inner wall of the installation groove 6.

[0023] Specifically, the lighting mechanism 2 allows users to clearly illuminate the contact point between the measuring plate 14 and the building structure without having to carry additional auxiliary lighting tools such as flashlights or desk lamps during nighttime construction or indoor dimly lit area inspections. It also clearly displays the scale lines on the front surface of the L plate 11, reducing tool carrying costs and operating steps, and significantly improving measurement efficiency.

[0024] Furthermore, the user aligns the connecting plate 22 with the lighting plate 23 with the connecting groove 21. At this time, the compression spring 5 pushes the disassembly and assembly block 242 downward in its natural state, so that the bottom of the disassembly and assembly block 242 is precisely inserted into the slot 243 opened at the top of the connecting plate 22, firmly fixing the connecting plate 22 and the measuring plate 14, ensuring that the lighting plate 23 will not loosen or shift during subsequent measurements. After installation, the power switch of the lighting plate 23 is turned on, and its light can directly cover two key measurement areas: one is the contact position between the measuring plate 14 and the building body, eliminating the visual blind spot in this area, allowing the user to clearly observe whether the measuring plate 14 is completely attached to the surface of the building body, avoiding the deviation in the judgment of the measurement starting point due to dim light; the other is the scale line on the front surface of the L plate 11, which is illuminated by the light. The measurement lines are clearly visible, allowing users to quickly and accurately read the measurement values. At the same time, observe the position of the bubble in the bubble level 7. If the bubble remains centered, it indicates that the measuring plate 14 is parallel and horizontal to the surface of the building. The thickness value measured at this time can truly reflect the actual size of the building. When it is necessary to replace the lighting plate 23 or when there is sufficient light and no lighting is needed, the user can lift the lifting rings 252 on both sides of the top of the measuring plate 14 by hand. The lifting rings 252 drive the guide rod 4 through the connecting block 251, causing the disassembly and assembly block 242 to move upward. During this process, the disassembly and assembly block 242 compresses the spring 5 until the bottom of the disassembly and assembly block 242 is completely disengaged from the slot 243 at the top of the connecting plate 22, releasing the fixed relationship between the connecting plate 22 and the measuring plate 14, thereby enabling the disassembly of the lighting plate 23.

[0025] Example 2, the second embodiment of this utility model, the auxiliary disassembly mechanism 3 includes a receiving groove 31, which is opened on both sides of the inner wall of the connecting groove 21. A push spring 32 is provided on the inner wall of the receiving groove 31. One end of the push spring 32 is fixedly connected to the inner side of the inner wall of the receiving groove 31, and the other end of the push spring 32 is fixedly connected to a push block 33. The push block 33 is located on both sides of the inner side of the connecting plate 22. A limiting component 34 is opened on the inner side of the inner wall of the receiving groove 31. The limiting component 34 includes a limiting groove 341, which is opened on the inner side of the inner wall of the receiving groove 31. A limiting rod 342 is movably connected to the inner wall of the limiting groove 341. The outer side of the limiting rod 342 is fixedly connected to the inner side of the push block 33.

[0026] Specifically, the auxiliary disassembly mechanism 3 ensures the long-term stable use of the lighting mechanism 2. When the lighting panel 23 is depleted of power or its components are worn out and needs to be replaced or maintained, the disassembly and assembly of the lighting panel 23 can be completed quickly without the need for professional tools or complicated operations. This avoids the device from stopping due to the failure of the lighting panel 23 and ensures that the measurement work can be carried out continuously and smoothly.

[0027] Furthermore, when the fixing constraint of the connecting plate 22 inside the lighting panel 23 is removed, the spring 32 releases its elastic potential energy, pushing the push block 33 to move towards the connecting groove 21. The push block 33 acts directly on both ends of the inner side of the connecting plate 22, pushing the connecting plate 22 outward from the inner wall of the connecting groove 21, so that the connecting plate 22 automatically detaches from the connecting groove 21. The user can easily remove the connecting plate 22 with the lighting panel 23 without manually prying it off, thus achieving quick disassembly of the lighting panel 23. The push block 33 pushes the connecting plate 22 out of the connecting groove 21. During the process, the limiting rod 342 fixed inside the push block 33 will slide synchronously along the limiting groove 341 on the inner side of the inner wall of the receiving groove 31. The limiting groove 341 guides and restricts the limiting rod 342, preventing the push block 33 from deviating or tilting during the pushing process, and ensuring that the push block 33 always pushes the connecting plate 22 in a straight line. If the lighting plate 23 needs to be installed, the user can push the push block 33 back into the receiving groove 31 through the connecting plate 22, so that the push block 33 recompresses the pushing spring 32 until the push block 33 returns to its initial position, so that the lighting plate 23 can be disassembled again.

[0028] Working Principle: When the ambient light is dim during construction, the user aligns the connecting plate 22 with the lighting panel 23 with the pre-set connecting slots 21 on both sides of the measuring plate 14, and slowly pushes it in until it is fully embedded. At this time, the compression spring 5 in the movable slot 241 pushes the disassembly and assembly block 242 downward in its natural state, so that the bottom of the disassembly and assembly block 242 is precisely inserted into the slot 243 at the top of the connecting plate 22, firmly locking the connecting plate 22 and the measuring plate 14 to prevent the lighting panel 23 from loosening during the measurement process. After assembly, the power of the lighting panel 23 is turned on, and its light can cover two key areas: one is the contact position between the measuring plate 14 and the building body, and the other is the scale line on the front surface of the L plate 11, which can achieve the effect of illumination, so that the user can clearly observe the measurement position. Then, the slider 13 synchronously drives the measuring plate 14 to move until the other side of the measuring plate 14 is completely in contact with the corresponding surface of the building body. At this time, the scale line on the front surface of the L plate 11 is the measurement value. Since the lighting panel 23 has illuminated the scale line in advance, the user can quickly and accurately read the value. Without relying on an external light source, measurement efficiency and accuracy are significantly improved. When there is sufficient light and no illumination is needed, or when the illumination board 23 runs out of power or its components are worn out and need to be replaced, the user pulls up the lifting rings 252 on both sides of the top of the measuring board 14. The lifting rings 252 drive the guide rod 4 through the connecting block 251, causing the disassembly and assembly insert 242 to move upward, while simultaneously compressing the spring 5, until the bottom of the disassembly and assembly insert 242 is completely disengaged from the slot 243 of the connecting plate 22, releasing the fixing relationship. Then, the inner wall of the connecting groove 21 receives the groove 31. The push spring 32 inside releases elastic potential energy, pushing the push block 33 to move towards the connecting groove 21. The push block 33 acts on both ends of the inner side of the connecting plate 22, pushing the connecting plate 22 outward from the connecting groove 21. The user can easily remove the connecting plate 22 with the lighting plate 23 without manually prying it off, thus realizing the quick disassembly of the lighting plate 23. During this process, the limiting rod 342 on the inner side of the push block 33 slides along the limiting groove 341 in the receiving groove 31 to ensure that the push block 33 moves in a straight line and avoids deviation that could cause disassembly to be stuck.

[0029] In summary, by setting up the lighting mechanism 2 and the auxiliary disassembly mechanism 3, the lighting mechanism 2 can clearly illuminate the contact position between the measuring plate 14 and the building structure, and clearly display the scale lines on the front surface of the L plate 11, avoiding measurement position judgment deviations or reading errors caused by visual blur. At the same time, the auxiliary disassembly mechanism 3 provides convenient support for the disassembly and assembly of the lighting mechanism 2, solving the problem that in dimly lit construction environments, due to the lack of a lighting structure, users have difficulty clearly observing the contact position between the measuring plate and the building structure, and cannot accurately read the scale lines on the front surface of the L plate, which easily leads to measurement position judgment deviations or reading errors due to visual blur, affecting measurement accuracy and efficiency, thus achieving the effect of lighting function.

[0030] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0031] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0032] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A measuring device for detecting the main structure of a building, characterized in that: The device includes a measuring mechanism (1), which comprises an L-plate (11), a slide groove (12), a slider (13), and a measuring plate (14). The slide groove (12) is formed on both sides of the top of the L-plate (11). The slider (13) is movably connected to the inner wall of the slide groove (12). The measuring plate (14) is fixedly connected to the top of the slider (13). Lighting mechanism (2); The lighting mechanism (2) includes a connecting groove (21), which is opened on both sides of the measuring plate (14). A connecting plate (22) is movably connected to the inner wall of the connecting groove (21). A lighting plate (23) is fixedly connected to the outer side of the connecting plate (22). A disassembly assembly (24) is opened on the top of both sides of the measuring plate (14). A lifting assembly (25) is provided on both sides of the top of the measuring plate (14). Auxiliary disassembly mechanism (3); the auxiliary disassembly mechanism is located on both sides of the inner wall of the connecting groove (21).

2. The measuring device for detecting the main structure of a building according to claim 1, characterized in that: The disassembly and assembly assembly (24) includes a movable groove (241), which is opened on the top of both sides of the measuring plate (14). The inner wall of the movable groove (241) is movably connected to a disassembly and assembly plug (242). Slots (243) are opened on both sides of the top of the connecting plate (22). The bottom of the disassembly and assembly plug (242) is inserted into the inner wall of the slot (243).

3. The measuring device for detecting the main structure of a building according to claim 2, characterized in that: The top of the disassembly and assembly plug (242) is fixedly connected to a guide rod (4), the top of the guide rod (4) extends through to the top of the measuring plate (14), and a compression spring (5) is sleeved on the surface of the guide rod (4). One end of the compression spring (5) is fixedly connected to the top of the disassembly and assembly plug (242), and the other end of the compression spring (5) is fixedly connected to the top of the inner wall of the movable groove (241).

4. The measuring device for detecting the main structure of a building according to claim 3, characterized in that: The lifting assembly (25) includes a connecting block (251), which is disposed on both sides of the top of the measuring plate (14). The connecting block (251) is fixedly connected to the surface of the guide rod (4), and a lifting ring (252) is fixedly connected to the top of the connecting block (251).

5. The measuring device for detecting the main structure of a building according to claim 1, characterized in that: The auxiliary disassembly mechanism (3) includes a receiving groove (31), which is opened on both sides of the inner wall of the connecting groove (21). A push spring (32) is provided on the inner wall of the receiving groove (31). One end of the push spring (32) is fixedly connected to the inner side of the inner wall of the receiving groove (31), and the other end of the push spring (32) is fixedly connected to a push block (33). The push block (33) is located on both sides of the inner side of the connecting plate (22). A limit component (34) is opened on the inner side of the inner wall of the receiving groove (31).

6. The measuring device for detecting the main structure of a building according to claim 5, characterized in that: The limiting component (34) includes a limiting groove (341), which is opened on the inner side of the inner wall of the receiving groove (31). A limiting rod (342) is movably connected to the inner wall of the limiting groove (341), and the outer side of the limiting rod (342) is fixedly connected to the inner side of the push block (33).

7. The measuring device for detecting the main structure of a building according to claim 1, characterized in that: The measuring plate (14) has an installation groove (6) on its top, and a bubble level (7) is fixedly connected to the inner wall of the installation groove (6).

Images