Measuring tool for polygonal strip steel

Abstract

The invention relates to a measuring tool for polygonal bar steel, which is used for measuring the side length of a to-be-measured side of non-right-angle polygonal bar steel and comprises a main ruler and an auxiliary ruler, the main ruler extends in an axial direction, the auxiliary ruler is connected to the main ruler and can slide relative to the main ruler, and at least one measuring fitting side extending in the axial direction is arranged on the main ruler. A first measuring scale is assembled on the main scale and can pivot relative to the main scale, a first attaching edge is arranged on the first measuring scale and is adjacent to the measuring attaching edge, the pivot axis of the first measuring scale is overlapped on the first attaching edge and the measuring attaching edge, and the pivot axis of the first measuring scale is arranged at the position aligned with the zero point scale. A second measuring scale is assembled on the auxiliary scale and can pivot relative to the auxiliary scale, a second attaching edge on the second measuring scale is adjacent to the measuring attaching edge, and the pivot axis of the second measuring scale coincides with the second attaching edge and the measuring attaching edge. A measuring space is surrounded by the measuring fitting edge, the first fitting edge and the second fitting edge.

Description

Technical Field

[0001] The present invention relates to a measuring tool for polygonal steel bars, and more particularly to an invention in which pivotable measuring rulers are respectively assembled on the main scale and the auxiliary scale of the measuring tool, and the pivot axis of the measuring ruler on the main scale coincides with the fitting edge of the main scale and the measuring ruler corresponding to the polygonal steel bar, and is set at the zero point scale position. Therefore, the length of the side to be measured of the non-right-angled polygonal steel bar can be measured by pivoting the measuring ruler without correcting the zero point scale. Background Art

[0002] The existing vernier caliper includes a main scale and a secondary scale that can slide on the main scale, and each of the main scale and the secondary scale has an integrally formed ruler perpendicular to the main scale and the secondary scale. When measuring the length of the side to be measured of the workpiece to be measured, the secondary scale is slid to an appropriate distance so that the rulers on the main scale and the secondary scale clamp the two side edges of the workpiece to be measured that are perpendicular to the side to be measured, and the length of the side to be measured is obtained through the size scales on the main scale and the secondary scale. However, when measuring a non-right-angled workpiece to be measured (such as a polygonal bar steel), the side to be measured and the two side edges are not right angles, so that the ruler of the vernier caliper cannot directly clamp the two side edges of the side to be measured to obtain the length of the side to be measured.

[0003] For the measurement of the dimensions of non-right-angled polygonal steel bars, the existing production-side quality control sampling method is to slice and then measure with an optical microscope (OM). However, the slices are easily cut crooked during sampling, resulting in errors in measurement. In addition, it is impossible to measure in real time during production. If the sampling measurement does not meet the quality control requirements, it is easy to generate a large amount of waste materials.

[0004] Chinese patent No. CN205808273U proposes a "caliper" including a scale, a first outer jaw fixed at one end of the scale, and a second outer jaw slidably connected at the other end, and a non-zero preset angle between the first outer jaw and the second outer jaw, the preset angle being an angle matching the angle between the chamfered end faces of the object to be measured. However, the jaws of the above-mentioned previous case are fixed on the scale, and the preset angle cannot be changed, and the objects to be measured with different chamfers cannot be measured.

[0005] Chinese Patent No. CN205245921U proposes "a vernier caliper for measuring chamfers of parts", which consists of a main scale, a secondary scale, fixed jaws, movable jaws, two working blocks, screws, positioning pins, etc. The measuring edges of the working blocks on the main scale and the secondary scale form an angle close to the workpiece being measured, and the angle can be accurately aligned with the chamfer edge position of the workpiece being measured during measurement. However, the working blocks of the above-mentioned previous case are segmented, and the case specification discloses that polygons with chamfers of 30°, 45° and 60° can be measured, and when the working blocks are rotated to each measuring edge, the end of the measuring edge needs to be set to align with the 0-point scale in order to accurately measure the workpiece being measured, and the structure is complicated.

[0006] Chinese patent No. CN204115593U proposes "a vernier caliper capable of measuring the length of any polygonal side", including a caliper body and a vernier. The caliper body is provided with a fixed claw, and the vernier is provided with a movable claw. The fixed claw and the movable claw are each provided with a foot that can rotate around a common center of a circle, and a circular arc groove is provided on each of the fixed claw and the movable claw, so that the foot can rotate along the circular arc groove. However, the vernier caliper of the above-mentioned previous case can only measure the length of the side to be measured at the end of the workpiece to be measured. For example, when it is necessary to measure the length of the side to be measured at the middle section of a polygonal steel bar, it will be blocked by the fixed claw and the movable claw, so that the foot cannot fit the two sides of the adjacent side to be measured.

[0007] Chinese Patent No. CN217005563U proposes "a dimension measuring tool suitable for various bending angle structures", including a ruler body, a movable main ruler and a movable auxiliary ruler. One end of the ruler body is hinged with an angle arm, which is pivoted to fit the side of the workpiece at different angles, and the main ruler is moved to calibrate the 0-point scale position. However, the measuring tool in the above-mentioned previous case has only one angle arm, which cannot fit the two sides of the workpiece adjacent to the side to be measured, and the 0-point scale position needs to be calibrated when measuring workpieces at different angles. Summary of the invention

[0008] Therefore, an object of the present invention is to provide a measuring tool for polygonal steel bars.

[0009] The present invention provides a measuring tool for polygonal steel bars, which is used to measure the length of a side to be measured of a polygonal steel bar. The polygonal steel bar has a first side and a second side adjacent to the side to be measured, the first side and the side to be measured have a first non-right angle, and the second side and the side to be measured have a second non-right angle.

[0010] The polygonal bar steel measuring tool comprises:

[0011] A main ruler and a secondary ruler, the main ruler extends in an axial direction, the secondary ruler is connected to the main ruler and can move relative to the main ruler in the axial direction, and at least a measuring fitting edge extending along the axial direction is provided on the main ruler. A first ruler is assembled on the main ruler and can pivot relative to the main ruler, the first ruler has a first fitting edge adjacent to the measuring fitting edge, the pivot axis of the first ruler coincides with the first fitting edge and the measuring fitting edge, and the pivot axis of the first ruler is arranged at a zero-point scale position. A second ruler is assembled on the secondary ruler and can pivot relative to the secondary ruler, the second ruler has a second fitting edge adjacent to the measuring fitting edge, and the pivot axis of the second ruler coincides with the second fitting edge and the measuring fitting edge.

[0012] A measuring space is surrounded by the measuring fitting edge, the first fitting edge and the second fitting edge; the polygonal steel bar is located in the measuring space, and the side to be measured is fitted with the measuring fitting edge, and then the first measuring ruler is pivoted relative to the main ruler so that the first fitting edge and the measuring fitting edge have a first fitting angle that is not a right angle, and the first fitting angle is equivalent to the first angle; the second measuring ruler is pivoted relative to the auxiliary ruler so that the second fitting edge and the measuring fitting edge have a second fitting angle that is not a right angle, and the second fitting angle is equivalent to the second angle, so that the first fitting edge and the second fitting edge are fitted with the first side edge and the second side edge respectively, thereby measuring the side length of the side to be measured.

[0013] Furthermore, the main ruler has two concentric first arc grooves, and the first ruler has two first guide posts extending into the two first arc grooves respectively; the secondary ruler has two concentric second arc grooves, and the second ruler has two second guide posts extending into the two second arc grooves respectively. Preferably, the arc of the first arc groove and the second arc groove is 140 degrees, when the first ruler is perpendicular to the main ruler, the first guide post is located in the middle of the first arc groove, so that the first ruler can pivot 70 degrees in both the forward and reverse directions, and when the second ruler is perpendicular to the secondary ruler, the second guide post is located in the middle of the second arc groove, so that the second ruler can pivot 70 degrees in both the forward and reverse directions.

[0014] Furthermore, the main ruler has a first arcuate groove, and a first pivot hole on the main ruler corresponds to the pivot axis of the first ruler, the first ruler has a first guide column extending into the first arcuate groove, and a first pivot column extending into the first pivot hole; the secondary ruler has a second arcuate groove, and a second pivot hole on the secondary ruler corresponds to the pivot axis of the second ruler, the second ruler has a second guide column extending into the second arcuate groove, and a second pivot column extending into the second pivot hole. Preferably, the first pivot hole and the second pivot hole are semicircular holes recessed by the measuring fitting edge, and the first pivot column and the second pivot column are arc blocks with an arc of 90 degrees. When the first ruler is perpendicular to the main ruler, the first pivot column is located in the middle section of the first pivot hole, so that the first ruler can pivot 45 degrees in both the forward and reverse directions. When the second ruler is perpendicular to the secondary ruler, the second pivot column is located in the middle section of the second pivot hole, so that the second ruler can pivot 45 degrees in both the forward and reverse directions.

[0015] Furthermore, a first elastic member is provided at one end on the main scale and the other end is connected to the first measuring scale, and a second elastic member is provided at one end on the secondary scale and the other end is connected to the second measuring scale. Furthermore, a first axial hole is provided on the main scale, a first gear is rotatably provided on the first axial hole, the first elastic member is a first torsion spring, the first torsion spring is inserted into the first axial hole, one end of the first torsion spring is fixed on the main scale and the other end is connected to the first gear, and the first measuring scale has an arc-shaped first scale portion meshing with the first gear; a second axial hole is provided on the secondary scale, a second gear is rotatably provided on the second axial hole, the second elastic member is a second torsion spring, the second torsion spring is inserted into the second axial hole, one end of the second torsion spring is fixed on the secondary scale and the other end is connected to the second gear, and the second measuring scale has an arc-shaped second scale portion meshing with the second gear. Preferably, the arc angle of the first ruler portion of the arc is 90 degrees, and the first gear corresponds to the middle section of the first ruler portion of the arc, so that the first ruler can pivot 45 degrees in both the forward and reverse directions; the arc angle of the second ruler portion of the arc is 90 degrees, and the second gear corresponds to the middle section of the second ruler portion of the arc, so that the second ruler can pivot 45 degrees in both the forward and reverse directions.

[0016] Furthermore, a limiting screw is provided on the secondary ruler, which can lock the secondary ruler when the secondary ruler moves to a preset distance relative to the main ruler.

[0017] Furthermore, the main scale and the auxiliary scale are in the form of vernier calipers or micrometers.

[0018] Furthermore, the main ruler includes a detachable first sleeve jig, and the secondary ruler includes a detachable second sleeve jig. The first ruler is assembled on the first sleeve jig and can pivot relative to the main ruler, and the second ruler is assembled on the second sleeve jig and can pivot relative to the secondary ruler, and the measuring fitting edge is located on the first sleeve jig and the second sleeve jig. For example, there is a first distance measuring part on the main ruler, and a second distance measuring part on the secondary ruler; the first sleeve fixture has a first sleeve hole and a first tightening hole, the first sleeve fixture is sleeved on the first distance measuring part through the first sleeve hole, and a first tightening piece is inserted into the first tightening hole to tighten the first sleeve fixture on the first distance measuring part; the second sleeve fixture has a second sleeve hole and a second tightening hole, the second sleeve fixture is sleeved on the second distance measuring part through the second sleeve hole, and a second tightening piece is inserted into the second tightening hole to tighten the second sleeve fixture on the second distance measuring part. Furthermore, the pivot axis of the first ruler is aligned with the end face of the first distance measuring part, the pivot axis of the second ruler is aligned with the end face of the second distance measuring part, and the first ruler and the second ruler are staggered in a longitudinal direction perpendicular to the axial direction, so that the second distance measuring part can be moved to fit the first distance measuring part to achieve the size zeroing.

[0019] The following effects can be achieved according to the above technical features:

[0020] 1. Polygonal steel bars of any angle can be measured without calibrating the zero point scale: The first ruler and the second ruler of the present invention can be pivoted steplessly, can measure polygonal steel bars of any angle, and can measure the length of the side to be measured of the polygonal steel bars at any position in the length direction. The pivot axis of the first ruler coincides with the first fitting edge and the measured fitting edge, and the pivot axis of the first ruler is set at the zero point scale position. Therefore, when measuring the sides to be measured of different polygonal steel bars and pivoting the first ruler to different first fitting angles, the ends of the sides to be measured of the polygonal steel bars can be aligned with the zero point scale without calibration.

[0021] 2. The pivot axis does not need to be provided with a pivot shaft rod, and will not block the polygonal bar from aligning with the zero scale: the first measuring ruler is connected to the main ruler through two or more concentric first arc grooves, and the second measuring ruler is connected to the secondary ruler through two or more concentric second arc grooves. Therefore, the pivot axis does not need to be provided with a pivot shaft rod, so that the edge of the polygonal bar to be measured will not be blocked by the pivot shaft rod and can be accurately attached to the measuring attachment edge of the main ruler, and the end of the edge of the polygonal bar to be measured can be accurately aligned with the zero scale.

[0022] 3. The pivot axis is formed by the arc-shaped pivot column corresponding to the semicircular pivot hole, which will not block the polygonal steel bar from aligning with the zero point scale: when the first measuring ruler is pivoted to the first pivot hole of the main ruler through the first pivot column, and the second measuring ruler is pivoted to the second pivot hole of the secondary ruler through the second pivot column, the first pivot hole and the second pivot hole are set as semicircular holes recessed by the measuring fitting edge, and the first pivot column and the second pivot column are arc blocks with a smaller arc than the semicircular hole. Therefore, when the first measuring ruler and the second measuring ruler pivot, the first pivot column and the second pivot column will not be exposed from the first pivot hole and the second pivot hole, so that the edge of the polygonal steel bar to be measured will not be blocked by the first pivot column and the second pivot column and can be accurately fitted with the measuring fitting edge of the main ruler, and the end of the edge of the polygonal steel bar to be measured can be accurately aligned with the zero point scale.

[0023] 4. The first ruler and the second ruler can be automatically reset after pivoting: by installing a first elastic member between the main ruler and the first ruler, and installing a second elastic member between the auxiliary ruler and the second ruler, the first ruler and the second ruler can be automatically reset after measuring the polygonal bar.

[0024] 5. The first ruler and the second ruler can be controlled to pivot to a set angle (for example, 45 degrees, 70 degrees, etc.) in both the forward and reverse directions: when the first ruler is coupled to the main ruler through the first arcuate groove, and the second ruler is coupled to the secondary ruler through the second arcuate groove, the arc of the first arcuate groove and the second arcuate groove are set to 140 degrees; when the first ruler is pivotally connected to the first pivot hole (semicircular hole) of the main ruler through the first pivot column, and the second ruler is pivotally connected to the second pivot hole (semicircular hole) of the secondary ruler through the second pivot column, the first pivot column and the second pivot column are set to an arc block with an arc of 90 degrees; when the first elastic member connects the main ruler and the first ruler through the first gear, and the second elastic member connects the secondary ruler and the second ruler through the second gear, the arc of the first ruler portion on the first ruler and the arc of the second ruler portion on the second ruler are set to 90 degrees. Through the configuration relationship, the first ruler and the second ruler can be pivoted 45 degrees or 70 degrees in both the forward and reverse directions.

[0025] 6. The first ruler and the second ruler can be assembled in an integral manner or in a detachable manner: the first ruler and the second ruler can be assembled in an integral manner on the main ruler and the secondary ruler respectively, or can be assembled on the main ruler and the secondary ruler respectively through the detachable first sleeve fixture and the detachable second sleeve fixture as required.

[0026] 7. The first ruler and the second ruler are staggered to achieve dimension zeroing: The first ruler and the second ruler are staggered in the longitudinal direction of the vertical axis, so that the secondary ruler can be moved to the second distance measuring part to fit the first distance measuring part on the main ruler to achieve dimension zeroing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional appearance diagram of the polygonal steel bar measuring tool from one viewing angle according to the first embodiment of the present invention.

[0028] Figure 2 This is a three-dimensional appearance diagram of the polygonal steel bar measuring tool from another perspective according to the first embodiment of the present invention.

[0029] Figure 3 It is a plan view of a measuring tool for polygonal steel bars according to the first embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of measuring a first polygonal steel bar using a measuring tool for polygonal steel bars according to the first embodiment of the present invention.

[0031] Figure 5 It is a schematic diagram of the polygonal steel bar measuring tool according to the first embodiment of the present invention measuring a second polygonal steel bar.

[0032] Figure 6 It is a schematic diagram of measuring a third polygonal steel bar using the polygonal steel bar measuring tool according to the first embodiment of the present invention.

[0033] Figure 7 This is a three-dimensional appearance diagram of a polygonal steel bar measuring tool from one viewing angle according to a second embodiment of the present invention.

[0034] Figure 8 This is a three-dimensional appearance diagram of the polygonal steel bar measuring tool from another perspective according to the second embodiment of the present invention.

[0035] Fig. 9 It is a plan view of a measuring tool for polygonal steel bars according to a second embodiment of the present invention.

[0036] Fig.10 for Fig. 9 A partial enlarged view of .

[0037] Fig.11 This is one of the partial enlarged views of the polygonal bar measuring tool in use according to the second embodiment of the present invention.

[0038] Fig.12 This is a second partial enlarged view of the polygonal bar measuring tool according to the second embodiment of the present invention when in use.

[0039] Fig.13 This is a three-dimensional appearance diagram of a polygonal steel bar measuring tool from one viewing angle according to a third embodiment of the present invention.

[0040] Fig.14 This is a three-dimensional appearance diagram of the polygonal steel bar measuring tool from another perspective according to the third embodiment of the present invention.

[0041] Fig.15 It is a plan view of a measuring tool for polygonal steel bars according to a third embodiment of the present invention.

[0042] Fig.16 This is a cross-sectional view of a polygonal steel bar measuring tool according to a third embodiment of the present invention, in which a first ruler is connected to a first torsion spring and a second ruler is connected to a second torsion spring.

[0043] Fig.17 It is a three-dimensional exploded view of a measuring tool for polygonal steel bars according to a fourth embodiment of the present invention.

[0044] Fig.18 It is a three-dimensional assembly diagram of a polygonal steel bar measuring tool according to a fourth embodiment of the present invention.

[0045] Fig.19 It is a side view of a measuring tool for polygonal steel bars according to a fourth embodiment of the present invention.

[0046] Fig. 20 FIG. 4 is a top view of a measuring tool for polygonal steel bars according to a fourth embodiment of the present invention.

[0047] Fig.21 It is a schematic diagram of measuring a polygonal steel bar using a polygonal steel bar measuring tool according to a fourth embodiment of the present invention.

[0048] Fig. 22 This is a side view of the polygonal steel bar measuring tool according to the fourth embodiment of the present invention, in which the second distance measuring portion moves to fit the first distance measuring portion to achieve dimension zeroing.

[0049] Fig.23 This is a top view of the polygonal steel bar measuring tool according to the fourth embodiment of the present invention, in which the second distance measuring portion moves to fit the first distance measuring portion to achieve dimension zeroing.

[0050] Explanation of reference numerals: 1-main ruler; 11-dimension scale; 111-zero point scale; 12-measurement fitting edge; 13-first arc groove; 14-first pivot hole; 15-first axial hole; 16-first distance measuring part; 2-second ruler; 21-second arc groove; 22-second pivot hole; 23-limiting screw; 24-second axial hole; 25-second distance measuring part; 3-first measuring ruler; 31-first fitting edge; 32-pivot axis; 33-first guide column; 34-first pivot column; 35-arc-shaped first ruler part; 4-second measuring ruler; 41-second fitting edge; 42-pivot axis; 43-second guide column; 44-second pivot column; 45-arc-shaped second ruler part; 5-first polygonal steel bar; 51-edge to be measured; 52-first side edge; 5 3-second side; 5A-second polygonal steel bar; 51A-side to be measured; 5B-third polygonal steel bar; 51B-side to be measured; 52B-first side; 53B-second side; 5C-polygonal steel bar; 51C-side to be measured; 5D-polygonal steel bar; 6-first gear; 7-first torsion spring; 8-second gear; 9-second torsion spring; 10-first socket fixture; 101-first socket hole; 102-first tightening hole; 103-first tightening piece; 20-second socket fixture; 201-second socket hole; 202-second tightening hole; 203-second tightening piece; P-axial; L-longitudinal; S-measuring space; θ1-first angle; θ2-second angle; ψ1-first fitting angle; ψ2-second fitting angle. DETAILED DESCRIPTION

[0051] The following embodiments are only used to assist in explaining the polygonal bar measuring tool of the present invention, and are not intended to limit the present invention. In the following different embodiments, the same components are given the same reference numerals.

[0052] See also Figures 1 to 3 FIG. 1 is a first embodiment of the polygonal steel bar measuring tool of the present invention, comprising:

[0053] A main ruler 1 and a secondary ruler 2, the main ruler 1 extends in an axial direction P, the secondary ruler 2 is sleeved on the main ruler 1 and can slide relative to the main ruler 1 in the axial direction P, the secondary ruler 2 is provided with a limiting screw 23, which can lock the secondary ruler 2 when the secondary ruler 2 slides to a preset distance relative to the main ruler 1, and at least one dimension scale 11 is provided along the axial direction P on the main ruler 1, so that the main ruler 1 and the secondary ruler 2 are in the form of vernier calipers. A first measuring ruler 3 is pivotally connected to the main ruler 1. A second measuring ruler 4 is pivotally connected to the secondary ruler 2. One side edge of the main ruler 1 extending in the axial direction P is a measuring fitting edge 12, the first measuring ruler 3 has a first fitting edge 31 adjacent to the measuring fitting edge 12, and the pivot axis 32 of the first measuring ruler 3 coincides with the first fitting edge 31 and the measuring fitting edge 12 (the pivot axis 32 is shown in FIG. 2 ). Figure 3 ), the pivot axis 32 of the first ruler 3 is set at a position aligned with the zero point scale 111, the second ruler 4 has a second fitting edge 41 adjacent to the measuring fitting edge 12, and the pivot axis 42 of the second ruler 4 coincides with the second fitting edge 41 and the measuring fitting edge 12 (the pivot axis 42 is shown in Figure 3 A measuring space S is surrounded by the measuring laminating edge 12 , the first laminating edge 31 and the second laminating edge 41 .

[0054] Specifically, in this embodiment, two concentric first arc grooves 13 are provided on the main ruler 1, and two first guide posts 33 are provided on the first ruler 3, respectively extending into the two first arc grooves 13; two concentric second arc grooves 21 are provided on the secondary ruler 2, and two second guide posts 43 are provided on the second ruler 4, respectively extending into the two second arc grooves 21 (the second guide posts 43 are similar in shape to the first guide posts 33 and refer to Figure 3 ). The arc of the first arc groove 13 and the second arc groove 21 is 140 degrees. When the first scale 3 is perpendicular to the main scale 1, the first guide post 33 is located in the middle of the first arc groove 13, so that the first scale 3 can be pivoted 70 degrees in both the forward and reverse directions. When the second scale 4 is perpendicular to the secondary scale 2, the second guide post 43 is located in the middle of the second arc groove 21, so that the second scale 4 can be pivoted 70 degrees in both the forward and reverse directions.

[0055] See also Figure 4 As shown, the polygonal steel bar measuring tool is used to measure the side length of a side 51 to be measured of a first polygonal steel bar 5. The first polygonal steel bar 5 has a first side 52 and a second side 53 adjacent to the side 51 to be measured. The first side 52 and the side 51 to be measured have a first non-right angle θ1, and the first angle θ1 is an obtuse angle. The second side 53 and the side 51 to be measured have a second non-right angle θ2, and the second angle θ2 is an obtuse angle.

[0056] The first polygonal steel bar 5 is placed in the measuring space S, and the measured side 51 is made to fit the measuring fitting side 12. The first measuring ruler 3 is then pivoted relative to the main ruler 1 so that the first fitting side 31 is opened relative to the measuring fitting side 12 and has a first non-right angle fitting angle ψ1, and the first fitting angle ψ1 is equivalent to the first angle θ1. The second measuring ruler 4 is pivoted relative to the auxiliary ruler 2 so that the second fitting side 41 has a second non-right angle fitting angle ψ2 relative to the measuring fitting side 12, and the second fitting angle ψ2 is equivalent to the second angle θ2, so that the first fitting side 31 and the second fitting side 41 are respectively fitted to the first side 52 and the second side 53. By setting the pivot axis 32 of the first ruler 3 at the position aligned with the zero point scale 111, and the first ruler 3 is connected to the main ruler 1 through two concentric first arc grooves 13, and the second ruler 4 is connected to the secondary ruler 2 through two concentric second arc grooves 21, the pivot axes 32 and 42 do not need to be provided with a pivot shaft, so that the end of the side 51 to be measured of the first polygonal steel bar 5 can be aligned with the zero point scale 111, and will not be blocked by the pivot shaft and can be accurately fitted to the measuring fitting side 11 of the main ruler 1, thereby the size scale 11 on the main ruler 1 can be directly read to obtain the side length of the side 51 to be measured without going through a calibration step.

[0057] See also Figure 5 As shown, the polygonal steel bar measuring tool is used to measure the length of a side 51A to be measured of a second polygonal steel bar 5A. The second polygonal steel bar 5A is different from the first polygonal steel bar 5 in that the length of the side 51A to be measured is longer than the side 51 to be measured. At this time, the secondary scale 2 can be slid relative to the main scale 1 to a suitable distance so that the second measuring scale 4 is away from the first measuring scale 3, so that the second polygonal steel bar 5A can be sufficiently placed in the measuring space S. Similarly, by setting the pivot axis 32 of the first measuring scale 3 at a position aligned with the zero point scale 111, the end of the side 51A to be measured of the second polygonal steel bar 5A can be aligned with the zero point scale 111, and the size scale 11 on the main scale 1 can be directly read to obtain the length of the side 51A to be measured without going through a calibration step.

[0058] See also Figure 6As shown, the polygonal bar measuring tool is used to measure the side length of a side 51B to be measured of a third polygonal bar 5B. The third polygonal bar 5B is different from the first polygonal bar 5 in that the third polygonal bar 5B has a first side 52B and a second side 53B adjacent to the side 51B to be measured, the first side 52B and the side 51B to be measured have a first non-right angle θ1, the first angle θ1 is an acute angle, and the second side 53B and the side 51B to be measured have a second non-right angle θ2, the second angle θ2 is an acute angle. At this time, the first ruler 3 can be pivoted to make the first fitting angle ψ1 an acute angle, and the second ruler 4 can be pivoted to make the second fitting angle ψ2 an acute angle, so that the first fitting side 31 and the second fitting side 41 can fit the first side 52B and the second side 53B respectively. Similarly, by setting the pivot axis 32 of the first measuring ruler 3 at the position aligned with the zero point scale 111, the end of the measured side 51B of the third polygonal steel bar 5B can be aligned with the zero point scale 111, and the size scale 11 on the main ruler 1 can be directly read to obtain the side length of the measured side 51A without going through a calibration step.

[0059] According to the above description, the first ruler 3 and the second ruler 4 of the present invention can be pivoted steplessly and can measure polygonal bars of any angle, and the pivot axis 32 of the first ruler 3 overlaps the first fitting edge 31 and the measuring fitting edge 12, and the pivot axis 32 of the first ruler 3 is set at a position aligned with the zero point scale 111. Therefore, when measuring the measured edges of different polygonal bars and pivoting the first ruler 3 to different first fitting angles ψ1, the ends of the measured edges of the polygonal bars can be aligned with the zero point scale without calibration.

[0060] See also Figures 7 to 9 1 is a second embodiment of the polygonal bar measuring tool of the present invention. In this embodiment, the main ruler 1 has a first arc-shaped groove 13, and the main ruler 1 has a first pivot hole 14 corresponding to the pivot axis 32 of the first ruler 3 (the pivot axis 32 is shown in FIG. 1 ). Fig. 9 ), the first ruler 3 has a first guide post 33 extending into the first arc-shaped slot 13, and a first pivot post 34 extending into the first pivot hole 14; the secondary ruler 2 has a second arc-shaped slot 21, and the secondary ruler 2 has a second pivot hole 22 corresponding to the pivot axis 42 of the second ruler 4 (the pivot axis 42 is shown in FIG. Fig. 9 ), the second ruler 4 has a second guide post 43 (the second guide post 43 is similar in shape to the first guide post 33 and see Fig. 9 ) extends into the second arc-shaped slot 21, and a second pivot post 44 extends into the second pivot hole 22.

[0061] See also Figures 10 to 12As shown in the partial enlarged view (since the second ruler 4 is pivotally connected to the secondary ruler 2 in the same manner as the first ruler 3 is pivotally connected to the main ruler 1, the figure only shows the manner in which the first ruler 3 is pivotally connected to the main ruler 1), in this embodiment, the first pivot hole 14 and the second pivot hole 22 are semicircular holes concave from the measuring fitting edge 12, and the first pivot column 34 and the second pivot column 44 are arc blocks with an arc angle of 90 degrees. When the first ruler 3 is perpendicular to the main ruler 1, the first pivot column 34 is located in the middle of the first pivot hole 14, so that the first ruler 3 can be pivoted 45 degrees in both the forward and reverse directions. When the second ruler 4 When the secondary ruler 2 is vertical, the second pivot 44 is located in the middle section of the second pivot hole 22, thereby allowing the second ruler 4 to pivot 45 degrees in both the forward and reverse directions, and when the first ruler 3 and the second ruler 4 pivot, the first pivot 34 and the second pivot 44 will not be exposed from the first pivot hole 14 and the second pivot hole 22, so that the measured side 51C of the polygonal steel bar 5C will not be blocked by the first pivot 34 and the second pivot 44 and can be accurately fitted to the measuring fitting side 12 of the main ruler 1, and the end of the measured side 51C of the polygonal steel bar 5C can be accurately aligned with the zero point scale 111.

[0062] See also Figures 13 to 15 As shown, it is the third embodiment of the measuring tool for polygonal steel bars of the present invention. In this embodiment, one end of a first elastic member is arranged on the main scale 1, and the other end is connected to the first measuring scale 3, and one end of a second elastic member is arranged on the secondary scale 2, and the other end is connected to the second measuring scale 4.

[0063] Please refer to Fig.16 As shown, in this embodiment, the main scale 1 has a first shaft hole 15, a first gear 6 is rotatably arranged in the first shaft hole 15, the first elastic member is a first torsion spring 7, the first torsion spring 7 is inserted into the first shaft hole 15, and one end of the first torsion spring 7 is fixed to the main scale 1, and the other end is connected to the first gear 6, and the first scale 3 has an arc-shaped first scale portion 35 meshing with the first gear 6, the arc of the arc-shaped first scale portion is 90 degrees, and the first gear 6 corresponds to the middle section of the arc-shaped first scale portion 35, so that the first scale 3 can be pivoted in both the forward and reverse directions. The secondary ruler 2 has a second shaft hole 24, a second gear 8 is rotatably disposed in the second shaft hole 24, the second elastic member is a second torsion spring 9, the second torsion spring 9 is inserted into the second shaft hole 24, and one end of the second torsion spring 9 is fixed to the secondary ruler 2, and the other end is connected to the second gear 8, the second ruler 4 has an arc-shaped second ruler portion 45 meshing with the second gear 8, the arc of the arc-shaped second ruler portion 45 is 90 degrees, the second gear 8 corresponds to the middle section of the arc-shaped second ruler portion 45, so that the second ruler 4 can pivot 45 degrees in both the forward and reverse directions.

[0064] In this embodiment, the first torsion spring 7 and the second torsion spring 9 enable the first measuring scale 3 and the second measuring scale 4 to automatically return to a state perpendicular to the main scale 1 and the auxiliary scale 2 respectively after measuring the polygonal steel bar.

[0065] See also Figures 17 to 19 As shown in FIG. 4 , it is a fourth embodiment of the measuring tool for polygonal steel bars of the present invention. In this embodiment, it is to be explained that the first measuring scale 3 and the second measuring scale 4 can be assembled on the main scale 1 and the secondary scale 2 in an integral manner, and can also be assembled on the main scale 1 and the secondary scale 2 respectively through a detachable first sleeve fixture 10 and a detachable second sleeve fixture 20 on the main scale 1 and the secondary scale 2 as required. In this embodiment, the main scale 1 and the secondary scale 2 are in the form of a micrometer. There is a first distance measuring part 16 on the main scale 1, and a second distance measuring part 25 on the secondary scale 2. The first distance measuring part 16 is an anvil on the micrometer main scale in this embodiment, and the second distance measuring part 25 is a micrometer screw on the micrometer secondary scale in this embodiment. The first sleeve fixture 10 has a first sleeve hole 101 and a first tightening hole 102. The first sleeve fixture 10 is sleeved on the main scale 1 and the secondary scale 2 through the first sleeve hole 101. The first distance measuring part 16 is provided with a first clamping piece 103 extending into the first clamping hole 102 to clamp the first sleeve fixture 10 on the first distance measuring part 16. The second sleeve fixture 20 has a second sleeve hole 201 and a second clamping hole 202. The second sleeve fixture 20 is sleeved on the second distance measuring part 25 through the second sleeve hole 201, and a second clamping piece 203 is extended into the second clamping hole 202 to clamp the second sleeve fixture 20 on the second distance measuring part 25. After assembly, a measuring fitting edge is located on the first sleeve fixture 10 and the second sleeve fixture 20, and the pivot axis 32 of the first ruler 3 is aligned with the end surface of the first distance measuring part 16, and the pivot axis 42 of the second ruler 4 is aligned with the end surface of the second distance measuring part 25.

[0066] See also Fig. 20 As shown, the special feature of this embodiment is that after the first ruler 3 and the second ruler 4 are respectively assembled on the main ruler 1 and the secondary ruler 2 , the first ruler 3 and the second ruler 4 are staggered with each other in a longitudinal direction L perpendicular to the axial direction P.

[0067] See also Fig.21 As shown, by aligning the pivot axis 32 of the first ruler 3 with the end surface of the first distance measuring part 16 and the pivot axis 42 of the second ruler 4 with the end surface of the second distance measuring part 25, the effect of not needing to calibrate the zero point scale when pivoting the first ruler 3 and the second ruler 4 for measuring the polygonal steel bar 5D as in the aforementioned embodiment is achieved.

[0068] See also Fig. 22 and Fig.23As shown, since the first measuring ruler 3 and the second measuring ruler 4 are interlaced in the longitudinal direction L, the second distance measuring portion 25 of the secondary ruler 2 can be moved to fit the first distance measuring portion 16 of the main ruler 1 to achieve the effect of zeroing the size.

[0069] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. A measuring tool for a polygonal steel bar, used for measuring the length of a side to be measured of a polygonal steel bar, wherein the polygonal steel bar has a first side and a second side adjacent to the side to be measured, the first side and the side to be measured have a first non-right angle, and the second side and the side to be measured have a second non-right angle, characterized in that: The measuring tool comprises: A main ruler and a secondary ruler, the main ruler extending in an axial direction, the secondary ruler connected to the main ruler and movable relative to the main ruler in the axial direction, at least one measuring fitting edge extending along the axial direction is provided on the main ruler; a first ruler, assembled on the main ruler and capable of pivoting relative to the main ruler, the first ruler having a first fitting edge adjacent to the measuring fitting edge, the pivot axis of the first ruler coinciding with the first fitting edge and the measuring fitting edge, and the pivot axis of the first ruler being arranged at a zero-point scale position; a second ruler assembled on the secondary ruler and capable of pivoting relative to the secondary ruler, the second ruler having a second fitting edge adjacent to the measuring fitting edge, and a pivot axis of the second ruler coinciding with the second fitting edge and the measuring fitting edge; A measuring space is surrounded by the measuring fitting edge, the first fitting edge and the second fitting edge. During measurement, the polygonal steel bar is located in the measuring space, and the side to be measured is fitted with the measuring fitting edge. The first measuring ruler is then pivoted relative to the main ruler so that the first fitting edge and the measuring fitting edge have a first fitting angle that is not a right angle, and the first fitting angle is equivalent to the first angle. The second measuring ruler is pivoted relative to the auxiliary ruler so that the second fitting edge and the measuring fitting edge have a second fitting angle that is not a right angle, and the second fitting angle is equivalent to the second angle. The first fitting edge and the second fitting edge are respectively fitted with the first side edge and the second side edge, thereby measuring the side length of the side to be measured.

2. The polygonal bar measuring tool according to claim 1, characterized in that: The main ruler has two concentric first arc grooves, and the first ruler has two first guide posts extending into the two first arc grooves respectively; the secondary ruler has two concentric second arc grooves, and the second ruler has two second guide posts extending into the two second arc grooves respectively.

3. The polygonal bar measuring tool according to claim 2, characterized in that: The curvature of the first arc groove and the second arc groove is 140 degrees. When the first ruler is perpendicular to the main ruler, the first guide post is located in the middle of the first arc groove, so that the first ruler can pivot 70 degrees in both the forward and reverse directions. When the second ruler is perpendicular to the secondary ruler, the second guide post is located in the middle of the second arc groove, so that the second ruler can pivot 70 degrees in both the forward and reverse directions.

4. The polygonal bar measuring tool according to claim 1, characterized in that: The main ruler has a first arcuate groove, and a first pivot hole on the main ruler corresponds to the pivot axis of the first ruler, the first ruler has a first guide column extending into the first arcuate groove, and a first pivot column extending into the first pivot hole; the secondary ruler has a second arcuate groove, and a second pivot hole on the secondary ruler corresponds to the pivot axis of the second ruler, the second ruler has a second guide column extending into the second arcuate groove, and a second pivot column extending into the second pivot hole.

5. The polygonal bar measuring tool according to claim 4, characterized in that: The first pivot hole and the second pivot hole are semicircular holes recessed from the measuring fitting edge, and the first pivot column and the second pivot column are arc blocks with an arc of 90 degrees. When the first ruler is perpendicular to the main ruler, the first pivot column is located in the middle section of the first pivot hole, so that the first ruler can pivot 45 degrees in both the forward and reverse directions. When the second ruler is perpendicular to the secondary ruler, the second pivot column is located in the middle section of the second pivot hole, so that the second ruler can pivot 45 degrees in both the forward and reverse directions.

6. The polygonal bar measuring tool according to claim 1, characterized in that: One end of a first elastic member is arranged on the main scale and the other end is connected to the first measuring scale, and one end of a second elastic member is arranged on the secondary scale and the other end is connected to the second measuring scale.

7. The polygonal bar measuring tool according to claim 6, characterized in that: The main scale has a first axial hole, a first gear is rotatably disposed in the first axial hole, the first elastic member is a first torsion spring, the first torsion spring is inserted into the first axial hole, one end of the first torsion spring is fixed to the main scale, and the other end is connected to the first gear, and the first scale has an arc-shaped first scale portion that engages with the first gear; the secondary scale has a second axial hole, a second gear is rotatably disposed in the second axial hole, the second elastic member is a second torsion spring, the second torsion spring is inserted into the second axial hole, one end of the second torsion spring is fixed to the secondary scale, and the other end is connected to the second gear, and the second scale has an arc-shaped second scale portion that engages with the second gear.

8. The polygonal steel bar measuring tool according to claim 7, characterized in that: The arc angle of the first ruler portion of the arc is 90 degrees, and the first gear corresponds to the middle section of the first ruler portion of the arc, so that the first ruler can pivot 45 degrees in both the forward and reverse directions; the arc angle of the second ruler portion of the arc is 90 degrees, and the second gear corresponds to the middle section of the second ruler portion of the arc, so that the second ruler can pivot 45 degrees in both the forward and reverse directions.

9. The polygonal steel bar measuring tool according to claim 1, characterized in that: A limiting screw is provided on the secondary scale, which can lock the secondary scale when the secondary scale moves to a preset distance relative to the main scale.

10. The polygonal bar measuring tool according to claim 1, characterized in that: The main scale and the auxiliary scale are in the form of vernier calipers or micrometers.

11. The polygonal steel bar measuring tool according to claim 1, characterized in that: The main ruler includes a detachable first sleeve jig, and the secondary ruler includes a detachable second sleeve jig. The first ruler is assembled on the first sleeve jig and can pivot relative to the main ruler. The second ruler is assembled on the second sleeve jig and can pivot relative to the secondary ruler. The measuring fitting edge is located on the first sleeve jig and the second sleeve jig.

12. The polygonal steel bar measuring tool according to claim 11, characterized in that: The main ruler has a first distance measuring part, the secondary ruler has a second distance measuring part, the first sleeve fixture is sleeved on the first distance measuring part and the second sleeve fixture is sleeved on the second distance measuring part, the pivot axis of the first ruler is aligned with the end surface of the first distance measuring part, the pivot axis of the second ruler is aligned with the end surface of the second distance measuring part, and the first ruler and the second ruler are staggered in a longitudinal direction perpendicular to the axial direction, so that the second distance measuring part can be moved to fit the first distance measuring part to achieve size zeroing.

13. The polygonal steel bar measuring tool according to claim 11, characterized in that: The main scale has a first distance measuring part, and the secondary scale has a second distance measuring part; the first sleeve fixture has a first sleeve hole and a first tightening hole, the first sleeve fixture is sleeved on the first distance measuring part through the first sleeve hole, and a first tightening piece is inserted into the first tightening hole to tighten the first sleeve fixture on the first distance measuring part; the second sleeve fixture has a second sleeve hole and a second tightening hole, the second sleeve fixture is sleeved on the second distance measuring part through the second sleeve hole, and a second tightening piece is inserted into the second tightening hole to tighten the second sleeve fixture on the second distance measuring part.

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