A measuring ruler for civil engineering

Abstract

This utility model discloses a measuring ruler for civil engineering, relating to the field of measuring ruler technology. It includes a fixed ruler with rotatable rotating rulers at both ends, both rotating rulers located on the same side of the fixed ruler. Each rotating ruler includes a protractor and an extension ruler fixedly connected. The protractor and fixed ruler are rotatably connected, with the straight edge of the protractor flush with one side of the extension ruler. The extension ruler and fixed ruler have the same width and can overlap. The protractor has several locking holes, and the fixed ruler has two locking holes at its end. Each locking hole has a threaded limiting bolt, which can be inserted into the locking holes to fix the extension ruler and fixed ruler at an angle of 0°, 90°, or 180°. The advantages of this utility model are: the protractor with multiple semi-circularly distributed locking holes, combined with the locking holes and limiting bolts at the end of the fixed ruler, allows for multi-angle measurements and line drawing, broadening its applicability. It also features a stable structure, strong load-bearing capacity, and safe and reliable measurement.

Description

Technical Field

[0001] This utility model relates to the field of measuring ruler technology, specifically a measuring ruler for civil engineering. Background Technology

[0002] Civil engineering is a general term for the science and technology of constructing various land engineering facilities. It refers not only to the materials and equipment used, and the technical activities such as surveying, design, construction, maintenance, and repair, but also to the objects of engineering construction. Various measuring devices are commonly used in civil engineering, among which measuring rulers are used extremely frequently. During construction, measuring rulers are required for measurement. Currently available measuring rulers have relatively limited functions, requiring users to purchase multiple rulers, increasing costs, and are inconvenient to carry, resulting in poor practicality.

[0003] Patent CN224365458U discloses a measuring ruler for civil engineering, which can be used to measure distances, right angles, levelness, and verticality. It offers multiple functions, greatly improving the utilization rate of the measuring ruler, saving costs, and is simple to operate and highly practical. It is extendable and retractable, making it easy to carry and use. By tightening the knob, the bottom of the knob makes tight contact with the upper surface of the fixed ruler and the extension ruler, thereby locking and fixing the extension ruler and effectively preventing it from loosening. The extension ruler and the rotating ruler are connected by a damping shaft.

[0004] However, this solution still has the following drawbacks: Besides right angles, it lacks the function of measuring and drawing other angles, thus its use is limited.

[0005] Because the extension ruler and the fixed ruler are fastened by the friction of the knob, and the extension ruler and the rotating ruler are kept perpendicular by the damping of the damping shaft, when the L-shaped opening of the rotating ruler is hung with a plumb bob, the friction and damping are not enough to stably support the weight of the plumb bob. The extension ruler and the rotating ruler are prone to collapse, leading to measurement accidents. Utility Model Content

[0006] The purpose of this invention is to provide a measuring ruler for civil engineering to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a measuring ruler for civil engineering, including a fixed ruler and two rotatable rotating rulers at both ends of the fixed ruler. The two rotating rulers are located on the same side of the fixed ruler. The rotating ruler includes a protractor and an extension ruler that are fixedly connected. The protractor and the fixed ruler are rotatably connected. The straight edge of the protractor is flush with one side of the extension ruler. The extension ruler and the fixed ruler have the same width and can overlap. The protractor has several locking holes. The fixed ruler has a second locking hole at its end. The second locking hole has a threaded limiting bolt. The limiting bolt can be inserted into the first locking hole to fix the extension ruler and the fixed ruler at a specific angle.

[0008] As an improvement, the first lock hole includes five semi-circularly evenly distributed lock holes. When the five lock holes are locked to the second lock hole by limiting bolts, the extension ruler and the fixed ruler are fixed at angles of 0°, 45°, 90°, 135°, and 180° respectively.

[0009] As an improvement, the protractor is rotatably connected to the fixed ruler via a fixed shaft.

[0010] As an improvement, the fixed ruler is provided with a third locking hole at its end. The second and third locking holes are symmetrically arranged on both sides of the fixed shaft. When the five first locking holes are locked to the third locking holes by limit bolts, the extension ruler and the fixed ruler are fixed at angles of 0°, 45°, 90°, 135°, and 180° respectively.

[0011] As an improvement, the end of the limiting bolt is provided with a fixed reduced-diameter straight head, which can be inserted into the lock hole.

[0012] As an improvement, the end of the extension ruler is provided with an L-shaped opening.

[0013] As an improvement, both the fixed ruler and the extended ruler are equipped with a level bubble meter.

[0014] As an improvement, the two extended rulers are of different lengths, one longer and one shorter.

[0015] The advantages of this utility model compared with the prior art are as follows: 1. Versatile Angle Measurement and Marking Functions: A protractor plate with multiple semi-circularly distributed locking holes (first type) and, in conjunction with locking holes (second and third types) and a limiting bolt at the end of the fixed ruler, allows the extension ruler and the fixed ruler to be precisely and securely locked at common angles such as 0°, 45°, 90°, 135°, and 180°. It can quickly switch between various working modes (straight ruler, extension ruler, right-angle ruler, angle ruler), offering intuitive and convenient operation. This not only solves the problem of existing technologies only being able to measure right angles, but also enables the measuring ruler to be used as an angle gauge, facilitating multi-angle measurements and marking during construction, thus broadening its applicability.

[0016] 2. Stable structure, strong load-bearing capacity, and safe and reliable measurement: Unlike existing technologies that rely on knob friction or damping shafts to maintain angle, this invention uses a reduced-diameter straight head of a limiting bolt directly inserted into the locking hole on the protractor plate to achieve rigid mechanical locking. This locking method is firm and reliable. When the L-shaped opening at the end of the extension ruler suspends the plumb bob, it can stably support the weight of the plumb bob, effectively preventing relative rotation or collapse between the extension ruler and the fixed ruler, avoiding measurement accidents, and improving measurement accuracy and safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings listed below are only some structural schematic diagrams of this utility model, and not all of them.

[0018] Figure 1 This is a schematic diagram of the structure of a measuring ruler for civil engineering according to this utility model.

[0019] Figure 2 This utility model describes the usage of a measuring ruler for civil engineering. Figure 1 .

[0020] Figure 3 This utility model describes the usage of a measuring ruler for civil engineering. Figure 2 .

[0021] Figure 4 This utility model describes the usage of a measuring ruler for civil engineering. Figure 3 .

[0022] Figure 5 This utility model describes the usage of a measuring ruler for civil engineering. Figure 4 .

[0023] Figure 6 This is a schematic diagram of the structure of a rotating ruler for measuring rulers used in civil engineering, according to this utility model.

[0024] Figure 7 This is a schematic diagram of the limiting bolt of a measuring ruler for civil engineering according to this utility model.

[0025] Figure label: Fixed ruler 1; Lock hole 2 11; Limiting bolt 12; Reduced diameter straight head 121; Lock hole 3 13; Protractor 2; Lock hole 1 21; Fixed shaft 22; Extension ruler 3; L-shaped opening 31; Horizontal bubble meter 32; Alignment opening 33. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be perfectly horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this utility model, the terms "multiple" or "several" refer to at least two.

[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] This embodiment, in conjunction with the accompanying drawings, provides a detailed description of a measuring ruler used in civil engineering.

[0032] This embodiment describes a measuring ruler for civil engineering, such as... Figures 1 to 7As shown, the device includes a fixed ruler 1 with rotatable rotating rulers at both ends. Two rotating rulers are located on the same side of the fixed ruler 1. Each rotating ruler includes a protractor 2 and an extension ruler 3 fixedly connected to each other. The protractor 2 is rotatably connected to the fixed ruler 1, facilitating the formation of a multi-functional ruler. The straight edge of the protractor 2 is flush with one side of the extension ruler 3. The protractor 2 is used to measure angles and, together with the fixed ruler 1 and extension ruler 3, can also be used to draw angle lines. The extension ruler 3 has the same width as the fixed ruler 1 and can overlap. When the fixed ruler 1 is extended through the extension ruler 3, it follows the same side line, facilitating measurement and line drawing. The protractor 2 has several locking holes 21. The fixed ruler 1 has a second locking hole 11 near its end, which is smaller than the first locking hole 21. The second locking hole 11 has a threaded limiting bolt 12. The limiting bolt 12 can be inserted into the first locking hole 21 to fix the extension ruler 3 and the fixed ruler 1 at an angle of 0°, 90°, or 180°, facilitating the formation of... Figure 1 , Figure 3 , Figure 5 The three usage states shown are for use as a fixed ruler, extension ruler, right-angle ruler, and plumb bob. When the limit bolt 12 is not inserted into the lock hole 21, it can be rotated to measure other angles.

[0033] like Figures 1 to 7 As shown, the first lock hole 21 includes five semi-circularly evenly distributed lock holes. When the five lock holes 21 are locked to the second lock hole 11 by the limiting bolts 12, the extension ruler 3 and the fixed ruler 1 are fixed at the included angles of 0°, 45°, 90°, 135° and 180° respectively. The addition of lock holes 21 corresponding to 45° and 135° facilitates the measurement of 45°, 90° and 135° angles.

[0034] like Figure 6 As shown, the protractor 2 is rotatably connected to the fixed ruler 1 via a fixed shaft 22. The outer end of the fixed shaft 22 has an enlarged limiting plate to prevent the fixed shaft 22 from detaching from the fixed ruler 1.

[0035] like Figure 5 As shown, the fixed ruler 1 has a locking hole 3 13 at its end. The locking holes 2 11 and 3 13 are the same size and symmetrically arranged on both sides of the fixed shaft 22. When the five locking holes 1 21 are locked to the locking holes 3 13 by the limiting bolts 12, the extension ruler 3 and the fixed ruler 1 are fixed at angles of 0°, 45°, 90°, 135°, and 180° respectively, and the angles formed by the locking holes 2 11 are opposite to those formed by the locking holes 2 11, which facilitates the formation of... Figure 4 The usage shown makes it easy to draw 45°, 90°, and 135° angles.

[0036] like Figure 7As shown, the end of the limiting bolt 12 is provided with a fixed reduced diameter straight head 121. The body of the limiting bolt 12 can be connected to the second lock hole 11 and the third lock hole 13 by threads. The reduced diameter straight head 121 can be inserted into the first lock hole 21. The reduced diameter straight head 121 is not threaded to the first lock hole 21, making the insertion smoother.

[0037] like Figures 1 to 6 As shown, the end of the extension ruler 3 is provided with an L-shaped opening 31 for hanging a plumb line and measuring verticality.

[0038] like Figures 1 to 6 As shown, both the fixed ruler 1 and the extended ruler 3 are equipped with a level bubble meter 32 for measuring levelness.

[0039] like Figure 6 As shown, the two extension rulers 3 are of different lengths, which can be used selectively to extend the fixed ruler 1 according to the actual situation. The longer extension ruler 3 is provided with an alignment opening 33, the distance of which from the rotating end is the same as the distance of the L-shaped opening 31 of the shorter extension ruler 3 from the rotating end. When the two extension rulers 3 are perpendicular to the fixed ruler 1 on the same side, the alignment opening 33 is directly opposite the L-shaped opening 31 of the shorter extension ruler 3, which is used to align the plumb line and determine whether the fixed ruler 1 and the extension ruler 3 are vertical, horizontal or whether the plumb line is normally vertical under this working condition.

[0040] In practical implementation: 1. Used as a regular ruler or extension ruler Reference Figure 3 When performing routine length measurements or drawing straight lines, rotate the ruler until the side of the extension ruler 3 is aligned with the side of the fixed ruler 1. Then, screw the limiting bolt 12 into the locking hole 11 and insert its reduced-diameter straight end 121 into the corresponding locking hole 21 on the protractor 2, thus locking the extension ruler 3 and the fixed ruler 1 together. At this point, the fixed ruler 1 and the extension ruler 3 form an extended straight ruler. If the distance to be measured is long, a longer extension ruler 3 can be used, or two extension rulers 3 can be rotated out for measurement. If a long straight line needs to be drawn, the line can be drawn along the flush sides of the fixed ruler 1 and the extension ruler 3. Simultaneously, observe the bubble level 32 on the fixed ruler 1 and the extension ruler 3 to ensure that the measurement or line drawing is horizontal.

[0041] 2. Used as a right-angle ruler, perpendicularity measuring tool, protractor, or for attaching a plumb line. Reference Figure 4 , Figure 5 When measuring or drawing right angles, or checking the verticality of walls or columns, rotate the rotating ruler at one end of the fixed ruler 1 until it is perpendicular to the fixed ruler 1. Screw the limiting bolt 12 into the locking hole 3 13, and insert the reduced-diameter straight head 121 into the locking hole 21 corresponding to the 90° angle on the protractor 2 and lock it. The fixed ruler 1 and the extended ruler 3 form a stable right-angle ruler. The verticality of the wall can be checked using the fixed ruler 1 and the extended ruler 3.

[0042] To measure angles or suspend a plumb bob, screw the limiting bolt 12 into the locking hole 11, insert the reduced-diameter straight head 121 into the locking hole 21 corresponding to the 90° angle on the protractor 2 and lock it. At this time, the protractor 2 faces inward and can be used as a protractor. Hang the plumb line directly on the L-shaped opening 31 at the end of the shorter extension ruler 3 and observe whether the plumb line passes through the alignment opening 33. Determine whether the fixed ruler 1 and the extension ruler 3 are vertical and horizontal or whether the plumb line is normally vertical under this condition. Since the reduced-diameter straight head 121 and the locking hole 21 are rigidly mechanically locked, they can stably bear the weight of the plumb line and ensure accurate measurement.

[0043] Used for drawing angle lines Reference Figure 4 When it is necessary to measure or draw a 45° or 135° angle, such as when laying out or making a diagonal brace, rotate the ruler to the required angle. Screw the limiting bolt 12 into the locking hole 13, and insert the reduced-diameter straight head 121 into the locking hole 21 on the protractor 2 corresponding to the 45° or 135° angle and lock it. At this time, the scale on the protractor 2 can accurately indicate the current angle. The user can directly draw the required 45° or 135° angled line along one side of the fixed ruler 1 and one side of the extended ruler 3.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the actual scope of protection is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A measuring ruler for civil engineering, comprising a fixed ruler (1), wherein the fixed ruler (1) has rotatable rotating rulers at both ends, and the two rotating rulers are located on the same side of the fixed ruler (1), characterized in that, The rotating ruler includes a protractor (2) and an extension ruler (3) that are fixedly connected. The protractor (2) and the fixed ruler (1) are rotatably connected. The straight edge of the protractor (2) is flush with one side of the extension ruler (3). The extension ruler (3) and the fixed ruler (1) have the same width and can overlap. The protractor (2) is provided with several locking holes (21). The end of the fixed ruler (1) is provided with a locking hole (11). The locking hole (11) is provided with a threaded limiting bolt (12). The limiting bolt (12) can be inserted into the locking hole (21) to fix the extension ruler (3) and the fixed ruler (1) at a specific angle.

2. A measuring ruler for civil engineering according to claim 1, characterized in that, The lock hole one (21) includes five semi-circularly evenly distributed lock holes. When the five lock holes one (21) are locked to the lock hole two (11) by the limiting bolt (12), the extension ruler (3) and the fixed ruler (1) are fixed at the included angles of 0°, 45°, 90°, 135° and 180° respectively.

3. A measuring ruler for civil engineering according to claim 1, characterized in that, The protractor (2) is rotatably connected to the fixed ruler (1) via a fixed shaft (22).

4. A measuring ruler for civil engineering according to claim 3, characterized in that, The fixed ruler (1) is provided with a locking hole three (13) at its end. The locking holes two (11) and three (13) are symmetrically arranged on both sides of the fixed shaft (22). When the five locking holes one (21) are locked to the locking holes three (13) by the limiting bolts (12), the extension ruler (3) and the fixed ruler (1) are fixed at the included angles of 0°, 45°, 90°, 135° and 180° respectively.

5. A measuring ruler for civil engineering according to claim 1, characterized in that, The end of the limiting bolt (12) is provided with a fixed reduced diameter straight head (121), which can be inserted into the lock hole (21).

6. A measuring ruler for civil engineering according to claim 1, characterized in that, The extension ruler (3) has an L-shaped opening (31) at its end.

7. A measuring ruler for civil engineering according to claim 1, characterized in that, Both the fixed ruler (1) and the extended ruler (3) are equipped with a horizontal bubble meter (32).

8. A measuring ruler for civil engineering according to claim 1, characterized in that, The two extended rulers (3) are of different lengths, one long and one short.

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