Measuring device for steel bar hook

Abstract

The utility model relates to the technical field of building measuring equipment, and provides a measuring device for a steel bar hook, which comprises a fixed ruler, a movable ruler and an angle ruler, and is characterized in that one end of the fixed ruler is provided with a fitting part with an arc-shaped structure; one end of the movable ruler is provided with a rotating part of an arc structure, the rotating part is rotationally connected with the attaching part so that the movable ruler can rotate relative to the fixed ruler, the attaching part and the rotating part are concentrically arranged, and the diameter of the outer wall face of the rotating part is equal to that of the outer wall face of the attaching part; one part of the angle ruler penetrates through the movable ruler and is connected with the fixed ruler, and the other part of the angle ruler is located on the movable ruler. Through the arrangement of the fixed ruler, the movable ruler, the angle ruler and the locking assembly, when the steel bar bending section is measured, the steel bar bending section is attached to the steel bar bending part for measurement, the tangency point of the bending section and the straight section can be accurately found, and meanwhile the steel bar bending arc inner diameter, the bending angle and the straight section length are measured; and the measurement precision and the measurement efficiency can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction measuring equipment, in particular to a measuring device for a steel bar hook. Background Art

[0002] In the construction field, steel bars often need to be bent by a steel bar bender. Due to the need to process a large number of steel bars, when the bending rollers in the steel bar bender are deformed or deviated, the bending arc diameter of the steel bar will deviate accordingly. Therefore, it is necessary to measure and review the bending arc diameter and the straight section length of the steel bar.

[0003] In the related art, a typical measurement method is that when measuring the inner diameter of the bending arc of a steel bar, the diameter of the bending roller in the steel bar bender is directly measured by a vernier caliper as the inner diameter of the bending arc of the steel bar; when measuring the straight section length of the steel bar hook, the tangent point between the arc of the steel bar hook and the straight section is judged and estimated by the human eye. Since the tangent point between the bending arc and the straight section cannot be determined, the straight section length cannot be accurately measured; and when the bending roller is deformed, using the measured diameter of the bending roller to represent the inner diameter of the bending arc of the steel bar will introduce uncertain errors.

[0004] Another typical measurement method is to directly measure the inner diameter of the bending arc of the processed steel bar and then measure the straight section length of the hook. When directly measuring the inner diameter of the bending arc of the processed steel bar, it is difficult to accurately measure the inner diameter of the bending arc of the steel bar because the center of the bending arc of the steel bar cannot be found; similarly, since the tangent point between the bending arc and the straight section cannot be accurately determined, the straight section length of the hook cannot be accurately measured. Summary of the Utility Model

[0005] The utility model provides a measuring device for a steel bar hook, which is used to solve the defects of large measurement error, low accuracy and low working efficiency in the prior art, and realize the accurate measurement of the steel bar hook.

[0006] The utility model provides a measuring device for a steel bar hook, including: a fixed ruler, a movable ruler and an angle ruler. One end of the fixed ruler has a fitting part with a circular arc structure; one end of the movable ruler has a rotating part with an arc structure, and the rotating part is rotatably connected to the fitting part so that the movable ruler can rotate relative to the fixed ruler, and the fitting part and the rotating part are concentrically arranged, and the outer wall diameter of the rotating part is equal to the outer wall diameter of the fitting part; a part of the angle ruler passes through the movable ruler and is connected to the fixed ruler, and the other part of the angle ruler is located on the movable ruler. Wherein, the outer side of the movable ruler has a straight edge, the straight edge is tangent to the arc edge of the rotating part, and a scale is provided on the straight edge for measuring the straight line length; a scale is provided on the part of the angle ruler located on the movable ruler for measuring the angle.

[0007] According to the measuring device for the steel bar hook provided by the present utility model, a locking assembly is further provided on the fixed ruler, and the locking assembly is used to lock the movable ruler to the fixed ruler after the movable ruler rotates to a predetermined angle.

[0008] According to the measuring device for the steel bar hook provided by the present utility model, an arc-shaped groove is formed on the movable ruler at the position of the rotating part, the locking assembly is arranged in the arc-shaped groove, and the arc-shaped groove is concentrically arranged with the rotating part.

[0009] According to the measuring device for the steel bar hook provided by the present utility model, the radian of the arc-shaped groove is greater than or equal to 180 degrees.

[0010] According to the measuring device for the steel bar hook provided by the present utility model, the locking assembly includes a fixed screw and a locking nut. One end of the fixed screw is connected to the fixed ruler, the other end of the fixed screw passes through the arc-shaped groove and extends freely, and the locking nut is arranged at the free extending end of the fixed screw.

[0011] According to the measuring device for the steel bar hook provided by the present utility model, the angle ruler includes a scale disk and a connecting shaft. The scale disk is arranged at one end of the connecting shaft, and the other end of the connecting shaft passes through the movable ruler and is connected to the fixed ruler.

[0012] According to the measuring device for the steel bar hook provided by the present utility model, the connecting shaft is in threaded connection with the fixed ruler.

[0013] According to the measuring device for the steel bar hook provided by the present utility model, an annular installation groove is arranged at the connection position between the scale disk and the connecting shaft. A pre-tightening spring is arranged in the installation groove. The pre-tightening spring is sleeved on the connecting shaft, and one end of the pre-tightening spring abuts against the scale disk, and the other end of the pre-tightening spring abuts against the movable ruler.

[0014] According to the measuring device for the steel bar hook provided by the present utility model, a limiting groove is formed at the end of the connecting shaft at the end of the scale disk.

[0015] According to the measuring device for the steel bar hook provided by the present utility model, a specification module is further provided on the fixed ruler, and the specification module is used to prompt the measured specification.

[0016] For the measuring device for the steel bar hook provided by the present utility model, through the settings of the fixed ruler, the movable ruler, the angle ruler and the locking assembly, when measuring the bent section of the steel bar, it is attached to the bent part of the steel bar for measurement, and the tangent point between the bent section and the straight section can be accurately found. At the same time, the inner diameter of the bending arc, the bending angle and the length of the straight section of the steel bar are measured, and the measurement accuracy and measurement efficiency can be significantly improved. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a top view structural schematic diagram of the measuring device provided by the present utility model.

[0019] Figure 2 It is an axial sectional structural schematic diagram of the measuring device provided by the present utility model.

[0020] Figure 3 It is a measuring structural schematic diagram of the measuring device provided by the present utility model.

[0021] Figure 4 It is a structural schematic diagram of the movable ruler in the measuring device provided by the present utility model.

[0022] Figure 5 It is a structural schematic diagram of the fixed ruler in the measuring device provided by the present utility model.

[0023] Figure 6 It is a structural schematic diagram of the angle ruler in the measuring device provided by the present utility model.

[0024] Figure 7 It is a process schematic diagram of the measuring method provided by the present utility model.

[0025] Figure 8 It is a schematic diagram of the bending angle and the straight line segment length specified in the relevant standard.

[0026] Reference numerals:

[0027] 10, fixed ruler; 11, connecting hole; 12, screw hole; 13, specification module; 20, movable ruler; 21, straight edge; 22, arc groove; 23, first identification module; 24, notch part; 30, angle ruler; 31, dial; 311, second identification module; 312, installation groove; 32, connecting shaft; 321, limit groove; 40, locking assembly; 41, fixing screw; 42, locking nut; 50, pre-tightening spring; 60, steel bar to be measured. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0031] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0032] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0033] The current national standards GB 50010-2010 (2015 edition) and GB 50204-2015 stipulate the inner diameter of the steel bar hook and the straight section length after bending. The inspection method used is measurement with a ruler, and the standards are stipulated as follows:

[0034] As Figure 8 shown, the "Code for Design of Concrete Structures" GB 50010-2010 (2015 edition) stipulates that when the end of the longitudinal tension ordinary steel bar adopts hook anchorage, for a 90° hook, a 90° hook at the end is required, the inner diameter of the hook is 4d, and the straight section length after bending is 12d (d is the diameter of the steel bar); for a 135° hook, a 135° hook at the end is required, the inner diameter of the hook is 4d, and the straight section length after bending is 5d.

[0035] GB 50204-2015 "Code for Acceptance of Construction Quality of Concrete Structures" stipulates "measurement with a ruler", but does not further explain "what kind of ruler meets the requirements and how to measure". And it is difficult to achieve accurate measurement in the related measurement methods.

[0036] Regarding the problems in the related technology, the following combines Figures 1-3 to describe a measuring device for steel bar hooks provided by the present utility model, which includes a fixed ruler 10, a movable ruler 20, and an angle ruler 30. One end of the fixed ruler 10 has a fitting part with a circular arc structure; one end of the movable ruler 20 has a rotating part with an arc structure, and the rotating part is rotatably connected to the fitting part so that the movable ruler 20 can rotate relative to the fixed ruler 10, and the fitting part and the rotating part are concentrically arranged, and the outer wall diameter of the rotating part is equal to the outer wall diameter of the fitting part; a part of the angle ruler 30 passes through the movable ruler 20 and is connected to the fixed ruler 10, and the other part of the angle ruler 30 is located on the movable ruler 20. When measuring and verifying the steel bar hook-shaped structure, the key is to achieve accurate measurement of the straight section and the bent section. In this embodiment, by setting one end of the fixed ruler 10 and the movable ruler 20 as a circular arc structure, it can be made to fit with the circular arc-shaped fitting part during measurement, so as to achieve accurate measurement of the bent section and the straight section.

[0037] It can be understood that when measuring the steel bar hook, since the tangent points of the arc section and the straight section are often obtained by visual observation to get the measured values, this method has a large error, and there may be obvious differences in the measurement data among different measurers. Therefore, it is necessary to carry out standardized operations and measurements to improve the measurement accuracy. In this embodiment, by providing a fitting portion at one end of the fixed ruler 10, and correspondingly connecting a movable ruler 20 and an angle ruler 30 at the position of the fitting portion, when measuring, the bending section and the straight section can be clearly shown through the scale markings on the movable ruler 20, and the measurement can be directly carried out through the scale on the straight edge 21, improving the measurement accuracy and efficiency.

[0038] Among them, the outer side of the movable ruler 20 has a straight edge 21, the straight edge 21 is tangent to the arc edge of the rotating portion, and the straight edge 21 is provided with scales for measuring the straight line length; a part of the angle ruler 30 located on the movable ruler 20 is provided with scales for measuring the angle. At the starting position of the scale on the straight edge 21, there is a first marking module 23, and the first marking module 23 can clearly mark the tangent point position to realize the measurement of the straight section of the steel bar hook.

[0039] Specifically, when measuring, the steel bar hook is fitted with the fitting portion. At this time, the bending angle can be rechecked through the scale on the angle ruler 30, and at the same time, it can be directly rechecked whether the straight section meets the standard requirements through the scale on the movable ruler 20, improving the measurement accuracy and realizing standardized measurement.

[0040] In this embodiment, the rotating portion and the fitting portion are concentric, and the outer diameter of the outer wall surface of the rotating portion is the same as the outer diameter of the outer wall surface of the fitting portion, which makes the outer wall surfaces of the arc portions of the rotating portion and the fitting portion coincide, so that when measuring and fitting the steel bar, rotating the movable ruler 20 can make the straight edge 21 directly fit and measure the straight section of the steel bar, improving the convenience and accuracy of the measurement reading.

[0041] Specifically, when setting, the fixed ruler 10 is an overall long strip-shaped block structure. One end of the fixed ruler 10 is provided with a semi-circular arc-shaped fitting portion, and the outer wall surface of the fitting portion is a semi-circular arc-shaped structure. Such a structure can realize the fitting with the inner arc edge of the steel bar hook to achieve rapid and accurate measurement. Further, the overall structure of the movable ruler 20 is a long strip-shaped structure, and its rotating portion is a fan-shaped structure formed by 3 / 4 of a circle. One side of the straight edge 21 is tangent to the side wall on the outside of the rotating portion, and a pushing side is formed opposite to one side of the straight edge 21. The pushing side is connected to the fan-shaped structure, so that when measuring, pushing the pushing side can make the movable ruler 20 rotate around the center position of the rotating portion.

[0042] Further, the rotational connection structure between the movable ruler 20 and the fixed ruler 10 is provided on the concentric axis shared by the rotating part and the fitting part, so that the movable ruler 20 rotates around the concentric axis when rotating.

[0043] In a specific application, the pushing side is integrally in a straight-line structure, and a notch 24 is provided on one side of the pushing side. The notch 24 facilitates manual force application, making the rotation of the movable ruler 20 more convenient.

[0044] According to an embodiment provided by the present utility model, a locking assembly 40 is further provided on the fixed ruler 10. The locking assembly 40 is used to lock the movable ruler 20 to the fixed ruler 10 after the movable ruler 20 rotates to a predetermined angle. When measuring, by rotating the movable ruler 20, the straight-edge 21 side of the movable ruler 20 is made to fit and measure against the straight segment of the reinforcing bar 60 to be measured. In this embodiment, the locking assembly 40 facilitates the measurement, making the measurement process more stable and improving the measurement accuracy and efficiency.

[0045] It can be understood that the method of fitting measurement facilitates reading and reduces the error caused by reading. And after fitting, the position of the movable ruler 20 can be locked by the locking assembly 40, and then the measurement data can be read, enabling efficient measurement.

[0046] For example, when measuring a large number of workpieces, multiple reviews are required. At this time, after a successful review once, the movable ruler 20 can be locked. At this time, the movable ruler 20 is in the correct size position. Then the extracted workpieces to be reviewed are fitted. When they can be completely fitted, it means that the bending angle of the workpiece is accurate, and there is no need to further read the data. Only by reading whether the length dimension is accurate can the review be achieved, and the accuracy of the review can be ensured, improving the efficiency and accuracy of the review.

[0047] According to the embodiment provided by the present utility model, an arc-shaped groove 22 is provided on the movable ruler 20 at the position of the rotating part. The locking assembly 40 is arranged in the arc-shaped groove 22, and the arc-shaped groove 22 is concentric with the rotating part. The arc-shaped groove 22 has a certain radian. When the movable ruler 20 rotates a certain dimension, it can be locked by the locking assembly 40, so as to maintain the stability of the movable ruler 20 during the measurement process.

[0048] Specifically, the radian of the arc-shaped groove 22 is greater than or equal to 180 degrees. The locking assembly 40 is located in the arc-shaped groove 22 and is locked by cooperating with the movable ruler 20. During the rotation process of the movable ruler 20, the size of its radian can limit the range of the rotation angle. In this embodiment, by limiting the angle, the movable ruler 20 can be applicable to the measurement of all bending radian.

[0049] It can be understood that the locking component 40 is initially located at one end of the arc-shaped groove 22. At this time, the entire movable ruler 20 is parallel to the entire fixed ruler 10. During measurement, the movable ruler 20 rotates, causing a certain angle to be formed between the movable ruler 20 and the fixed ruler 10, thereby achieving measurement. In this embodiment, by defining the radian of the arc-shaped groove 22 to be greater than 180 degrees, it can measure workpieces within all angular ranges, and common workpiece bending angles are 90°, 135°, and 180°, which are obviously within the measurement range of this embodiment.

[0050] In a specific embodiment, the locking component 40 includes a fixed screw 41 and a locking nut 42. One end of the fixed screw 41 is connected to the fixed ruler 10, and the other end of the fixed screw 41 passes through the arc-shaped groove 22 and extends freely. The locking nut 42 is provided at the freely extending end of the fixed screw 41. When the locking component 40 is in the unlocked state, the movable ruler 20 can rotate freely. When the locking component 40 is in the locked state, it can limit the rotation of the movable ruler 20, so that the movable ruler 20 is in a set angle. In this embodiment, the locking of the movable ruler 20 can be achieved through the threaded cooperation between the locking nut 42 and the screw, so that the movable ruler 20 is located at a specific position, making it more stable and easier to read during the measurement process.

[0051] Specifically, a screw hole 12 is provided on the fixed ruler 10. The position of the screw hole 12 is below the arc-shaped groove 22, and threads are provided in the screw hole 12. When the fixed screw 41 is connected, one end of it extends into the screw hole 12 through the arc-shaped groove 22 for threaded connection, and the other end extends outside the arc-shaped groove 22 and is connected to the locking nut 42. The locking nut 42 is threadedly connected to the screw. The rotation of the locking nut 42 can abut against the movable ruler 20, thereby achieving the locking of the movable ruler 20 and ensuring the stability of the movable ruler 20 during measurement.

[0052] In specific applications, the groove width of the arc-shaped groove 22 is slightly larger than the diameter of the fixed screw 41, which facilitates the rotation of the movable ruler 20 and avoids interference between the movable ruler 20 and the fixed screw 41 during rotation. And the radian of the arc-shaped groove 22 is 180 degrees, and the included angles between the starting end of the arc-shaped groove 22 and the ending end of the arc-shaped groove 22 and the vertical reference axis are 45 degrees.

[0053] According to an embodiment provided by the present invention, the angle ruler 30 includes a scale disk 31 and a connecting shaft 32. The scale disk 31 is provided at one end of the connecting shaft 32, and the other end of the connecting shaft 32 passes through the movable ruler 20 and is connected to the fixed ruler 10. During measurement, it is necessary to ensure that the movable ruler 20 can rotate. In this embodiment, through the setting of the connecting shaft 32, the angle ruler 30 can be stably connected, and the movable ruler 20 can rotate around the connecting shaft 32. On the one hand, the stability of the connection of the angle ruler 30 is improved. On the other hand, the movable ruler 20 can rotate around the connecting shaft 32, improving the stability of the rotation of the movable ruler 20.

[0054] During specific setting, a through hole is machined at the circular position of the rotating part on the movable ruler 20, and a connecting hole 11 is machined at the center position of the fitting part on the fixed ruler 10. The through hole and the connecting hole 11 are concentrically arranged, and the apertures of the through hole and the connecting hole 11 are the same. Among them, an internal thread is provided within the aperture of the connecting hole 11, and an external thread is machined at the end of the connecting shaft 32. The connection is threadedly connected to the connecting hole 11 to achieve the connection between the connecting shaft 32 and the fixed ruler 10.

[0055] Specifically, the external thread area on the connecting shaft 32 is larger than the thickness of the fixed ruler 10, which enables the connecting shaft 32 to rotate within the connecting hole 11 of the fixed ruler 10. Through rotation, it can move up and down to achieve the pre-tightening and loosening of the movable ruler 20. The connecting shaft 32 passes through the through hole and is threadedly connected to the connecting hole 11. When the movable ruler 20 rotates, it rotates around the connecting shaft 32, making the rotation smoother and more stable. The threaded connection method can also achieve the rotation of the dial 31, so that it can be adjusted during measurement, enabling the dial 31 to be aligned for angle measurement.

[0056] In a specific embodiment, scales are provided on one circle of the dial 31, and a second identification module 311 is provided on the dial 31. The second identification module 311 can clearly indicate the position of the identification. Further, as Figure 1 shown, at the initial stage of measurement, the second identification module 311 is aligned with the first identification module 23 on the movable ruler 20 in the same straight line, so that the second identification module 311 can be directly opposite to the upper and lower tangent point positions of the fixed ruler 10, thereby improving the measurement accuracy during angle measurement.

[0057] According to an embodiment provided by the present invention, an annular installation groove 312 is provided at the connection position between the dial 31 and the connecting shaft 32. A pre-tightening spring 50 is provided in the installation groove 312. The pre-tightening spring 50 is sleeved on the connecting shaft 32, and one end of the pre-tightening spring 50 abuts against the dial 31, and the other end of the pre-tightening spring 50 abuts against the movable ruler 20. If the movable ruler 20 shakes up and down during the rotation process, it will to a certain extent affect the measurement efficiency and measurement accuracy. In this embodiment, through the setting of the pre-tightening spring 50, a pre-tightening force can be applied to the movable ruler 20, making the rotation smoother and improving the measurement efficiency and measurement accuracy.

[0058] It can be understood that when performing measurement, it is necessary to rotate the movable ruler 20 so that the movable ruler 20 rotates to a certain angle. In this embodiment, through the pre-tightening spring 50, a pre-tightening force can be provided during the rotation of the movable ruler 20, so that the rotation is smoother. And through the action of the pre-tightening spring 50, the movable plate can be pre-tightened. At this time, it is convenient for the locking of the locking component 40, which is beneficial to the quick locking operation.

[0059] During specific setting, a limiting groove 321 is formed at one end of the connecting shaft 32 located at one end of the dial 31. The provision of the limiting groove 321 facilitates the rotation of the tool, enabling the angle ruler 30 to be easily rotated by an external tool when the angle ruler 30 needs to be rotated. Specifically, during the measurement process, it is necessary to tighten the angle ruler 30 so that the second marking module 311 on the angle ruler 30 is located at a specified position. At this time, it is more labor-saving and faster to rotate in cooperation with the limiting groove 321 by tools such as a screwdriver.

[0060] In an example provided by the present utility model, a specification module 13 is further provided on the fixed ruler 10, and the specification module 13 is used to prompt the measurement specification. As can be seen from the foregoing, in this embodiment, it is necessary to fit and measure with the bent part of the workpiece to be measured during measurement. In this embodiment, through the provision of the specification module 13, the matching of the specifications can be quickly realized, which is conducive to the selection during measurements of different specifications.

[0061] The present utility model also provides a measurement method, which can be understood in combination with the above-mentioned measurement device. The measurement method includes the following steps:

[0062] Step 100: Based on the nominal diameter of the steel bar, obtain the inner diameter of the bending arc of the steel bar. Specifically, according to the nominal diameter of the steel bar and relevant standard regulations, calculate and determine the inner diameter of the bending arc of the steel bar.

[0063] Step 200: Determine the specification of the measurement device based on the nominal diameter and the inner diameter of the bending arc.

[0064] Step 300: Take the steel bar 60 to be measured and make the bent section of the steel bar 60 to be measured fit with the fitting part of the measurement device. Specifically, place the processed steel bar on an approximate plane or set it up at an angle convenient for measurement. Make the fixed ruler 10 of the measurement device fit with the straight section of the steel bar main body, and use the fitting end of the measurement device to approach the bending arc of the steel bar. When the arc of the fitting end of the measurement device coincides with the bending arc of the steel bar, the nominal diameter of the measurement device at this time is the inner diameter of the bending arc. If the arc of the fitting part does not coincide with the bending arc of the steel bar, at this time, it is necessary to replace another measurement device close to it for measurement.

[0065] Step 400: Rotate the movable ruler 20 to make the straight edge 21 of the movable ruler 20 fit with the straight section of the steel bar, lock it through the locking assembly 40, and take a reading. Specifically, when the arc of the fitting part of the measurement device coincides with the bending arc of the steel bar, rotate the movable ruler 20 so that the straight edge 21 coincides with the straight section of the steel bar after bending, and tighten the locking nut 42 to lock it. Read the distance between the first marking module 23 on the measurement device and the straight section of the steel bar, which is the length of the straight section of the steel bar hook, accurate to 1 mm. Similarly, read the angle scale on the angle ruler 30, accurate to 5°.

[0066] Step 500: Process the measured values, determine whether they meet the standard requirements, and output the judgment result. Specifically, when measuring the same type of steel bars processed by the same device, no less than three pieces should be randomly inspected per working shift, and the average value of the three measured values should be used as the measurement result of the same type of steel bars in that working shift. When the average value of the measured values of the same type of steel bars processed by the same device in a certain working shift meets the standard regulations, it is determined that the same type of steel bars processed in that working shift meet the standard requirements; otherwise, double sampling shall be carried out for re-inspection. When the re-inspection result meets the standard regulations, it is determined that the same type of steel bars processed in that working shift meet the standard requirements; otherwise, it is determined that the type of steel bars processed in that working shift does not meet the standard requirements.

[0067] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment realizes the stable and efficient measurement of workpieces and improves the measurement accuracy through the cooperation of the fixed ruler 10, the movable ruler 20 and the angle ruler 30. Further, through the setting of the connecting shaft 32 and the pre-tightening spring 50 on the angle ruler 30, the rotation of the movable ruler 20 is made more stable, which is conducive to the quick locking of the locking assembly 40.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A measuring device for steel bar hooks, characterized in that: include: A fixed ruler, one end of which has a fitting portion with an arc-shaped structure; A movable ruler, one end of which has a rotating portion with an arc structure, the rotating portion is rotatably connected to the fitting portion, so that the movable ruler can rotate relative to the fixed ruler, and the fitting portion is concentrically arranged with the rotating portion, and the outer wall diameter of the rotating portion is equal to the outer wall diameter of the fitting portion; An angle ruler, a portion of which passes through the movable ruler and is connected to the fixed ruler, and another portion of which is located on the movable ruler; The outer side of the movable ruler has a straight edge, the straight edge is tangent to the arc edge of the rotating part, and the straight edge is provided with a scale for straight length measurement; the angle ruler part located on the movable ruler is provided with a scale for angle measurement.

2. The measuring device for steel bar hook according to claim 1, characterized in that: The fixed ruler is also provided with a locking assembly, and the locking assembly is used to lock the movable ruler to the fixed ruler after the movable ruler is rotated to a predetermined angle.

3. The measuring device for steel bar hook according to claim 2, characterized in that: An arc groove is provided on the movable ruler at the position of the rotating part, the locking assembly is arranged in the arc groove, and the arc groove is arranged concentrically with the rotating part.

4. The measuring device for steel bar hook according to claim 3, characterized in that: The arc angle of the arc groove is greater than or equal to 180 degrees.

5. The measuring device for steel bar hook according to claim 3, characterized in that: The locking assembly includes a fixing screw and a locking nut, one end of the fixing screw is connected to the fixing ruler, the other end of the fixing screw passes through the arc groove and freely extends out, and the locking nut is arranged at the freely extending end of the fixing screw.

6. The measuring device for steel bar hook according to claim 1, characterized in that: The angle ruler comprises a scale plate and a connecting shaft, wherein the scale plate is arranged at one end of the connecting shaft, and the other end of the connecting shaft passes through the movable ruler and is connected to the fixed ruler.

7. The measuring device for steel bar hook according to claim 6, characterized in that: The connecting shaft is threadedly connected to the fixed ruler.

8. The measuring device for steel bar hook according to claim 6, characterized in that: An annular mounting groove is provided at the connection position between the scale plate and the connecting shaft, a preload spring is provided in the mounting groove, the preload spring is sleeved on the connecting shaft, one end of the preload spring abuts against the scale plate, and the other end of the preload spring abuts against the movable ruler.

9. The measuring device for steel bar hook according to claim 8, characterized in that: A limiting groove is provided at the end of the connecting shaft located at one end of the scale plate.

10. The measuring device for steel bar hook according to claim 1, characterized in that: The fixed ruler is also provided with a specification module, and the specification module is used to prompt the measurement specifications.

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