Bevel dimension gauge

Abstract

To provide a bevel dimension gauge capable of measuring bevel dimensions of a plurality of types at a time.SOLUTION: A bevel dimension gauge comprises: a tabular first piece including a first regulation end abutting on a workpiece surface on which a bevel is formed; a tabular second piece including a second regulation end abutting on the workpiece surface and a third regulation end orthogonal to the second regulation end so as to abut on a root surface of the workpiece; and a third piece supported rotatably around a predetermined reference axis to the first piece. The first piece includes an angle scale indicating an angle around the reference axis to the first regulation end, the second piece includes a length scale along the third regulation end, and the third piece includes a fourth regulation end abutting on a bevel surface of the workpiece on the first end side in a longitudinal direction from the reference axis, and an angle indication part for indicating, on the angle scale, an angle of the fourth regulation end to the first regulation end on the second end side in the longitudinal direction from the reference axis.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a groove dimension gauge for measuring the groove dimension of a workpiece. [Background technology]

[0002] In order to determine whether the groove shape formed in the workpiece for welding is appropriate, it is necessary to measure the groove dimensions, such as the groove angle, groove depth, and root thickness, after the groove is formed in the workpiece.

[0003] Patent Document 1 listed below proposes a gauge capable of measuring a plurality of types of groove dimensions individually. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-253305 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the gauge of Patent Document 1 is not configured to measure multiple types of groove dimensions at the same time. For example, there may be about 200 locations for measuring groove angles and groove depths for one workpiece. If N types of groove dimensions are measured at the same measurement location, the number of measurements is 200×N, which is huge.

[0006] An object of the present disclosure is to provide a groove dimension gauge capable of measuring multiple types of groove dimensions at once. [Means for solving the problem]

[0007] A groove dimension gauge according to one embodiment of the present disclosure is a groove dimension gauge for measuring the angle of a groove formed in a workpiece and the depth or root thickness of the groove, and includes a plate-shaped first piece including a first regulating end that abuts against the workpiece surface on which the groove is formed, a plate-shaped second piece including a second regulating end that abuts against the workpiece surface and a third regulating end that is perpendicular to the second regulating end so as to abut against the root surface of the workpiece, and a third piece that is supported rotatably around a predetermined reference axis relative to the first piece, wherein the first piece includes an angle scale indicating an angle around the reference axis relative to the first regulating end, the second piece includes a length scale along the third regulating end, and the third piece includes a fourth regulating end that abuts against the groove surface of the workpiece on the first end side of the longitudinal direction from the reference axis, and an angle indicating portion that indicates on the angle scale the angle of the fourth regulating end relative to the first regulating end on the second end side of the longitudinal direction from the reference axis. Effect of the Invention

[0008] According to the present disclosure, multiple types of groove dimensions can be measured at once. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view showing a schematic configuration of a groove dimension gauge according to an embodiment of the present disclosure, in which the groove dimension gauge is brought into contact with a workpiece. [Diagram 2] FIG. 2 is a front view showing a schematic configuration of a groove dimension gauge according to an embodiment of the present disclosure, illustrating a state in which the groove dimension gauge is suspended above a workpiece. [Diagram 3] FIG. 3 is an exploded perspective view of the groove dimension gauge shown in FIG. [Figure 4] FIG. 4 is an exploded side view of the groove dimension gauge shown in FIG. [Diagram 5] FIG. 5 is a side view showing a state in which the groove dimension gauge is in contact with a workpiece having a curved surface. [Figure 6] FIG. 6 is a conceptual diagram showing an attachment of a groove dimension gauge according to a modified example of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Embodiment 1] Hereinafter, a groove dimension gauge according to one embodiment of the present disclosure will be described.

[0011] 1 and 2 are front views showing a schematic configuration of a groove dimension gauge according to an embodiment of the present disclosure. FIG. 1 shows a state in which the groove dimension gauge 1 is abutted against the workpiece W, and FIG. 2 shows a state in which the groove dimension gauge 1 is raised from the state of FIG. 1 relative to the workpiece W. Grooves G1 and G2 are formed at the ends of the workpiece W. In the example of FIG. 1 and FIG. 2, an X-shaped groove is formed, but the groove shape may be other shapes such as a V-shape. In this embodiment, the groove formed on the front surface S1 side of the workpiece W is referred to as the first groove G1, and the groove formed on the back surface S2 side of the workpiece W is referred to as the second groove G2. In the following, the front surface S1 and the back surface S2 of the workpiece W on which the grooves are formed may be collectively referred to as the workpiece surface.

[0012] The surface perpendicular to the work surfaces S1 and S2 between the grooves G1 and G2 is called the root surface S3. The root surface S3 is a portion of the end of the work W that is not cut by the groove processing. The root surface S3 is perpendicular to the work surfaces S1 and S2. Note that, in the following, a work W having flat work surfaces S1 and S2 will be described, but as will be described later, the groove dimension of a workpiece having curved work surfaces S1 and S2 can also be measured by the groove dimension gauge 1 of this embodiment.

[0013] In this embodiment, the surface between the work surface S1 and the root surface S3 is referred to as the first groove surface S4, and the surface between the work surface S2 and the root surface S3 is referred to as the second groove surface S5. The groove dimensions that can be measured by the groove dimension gauge 1 in this embodiment are the groove angles θ1 and θ2, the groove depths d1 and d2, and the root thickness d3.

[0014] The groove angle θ1 of the first groove G1 is the inclination angle of the first groove face S4 relative to the root face S3. The groove angle θ2 of the second groove G2 is the inclination angle of the second groove face S5 relative to the root face S3. The groove angles θ1 and θ2 are also called bevel angles. The groove depth d1 of the first groove G1 is the distance in the thickness direction of the workpiece W between the workpiece face S1 and the upper end of the root face S3. The groove depth d2 of the second groove G2 is the distance in the thickness direction of the workpiece W between the workpiece face S2 and the lower end of the root face S3. The root thickness d3 is the distance in the thickness direction of the workpiece W between the upper end and the lower end of the root face S3. The following mainly illustrates the manner in which the groove angle θ1, groove depth d1, and root thickness d3 of the first groove G1 are measured. The groove angle θ2 and groove depth d2 of the second groove G2 can also be measured in the same manner.

[0015] FIG. 3 is an exploded perspective view of the groove dimension gauge shown in FIG. 1. The groove dimension gauge 1 includes three plate-shaped pieces. The first piece 10 has a semicircular shape in a plan view. The second piece 20 has a curved ruler shape in a plan view. The third piece 30 has a rod shape in a plan view. The shapes of the pieces are not limited to these shapes. For example, the first piece 10 may have a rectangular shape.

[0016] The first piece 10 includes a first regulating end 11 that abuts against the work surface S1. The first regulating end 11 corresponds to a straight portion of the semicircular shape. The first piece 10 includes an angle scale 12 on its surface that indicates an angle around a predetermined reference axis B1 relative to the first regulating end 11. That is, the angle scale 12 indicates the angle around the reference axis B1 relative to the work surface S1 in a state in which the first regulating end 11 abuts against the work surface S1. The reference axis B1 is set perpendicular to the surface of the first piece 10 and at the center of the arc of the first piece 10.

[0017] The first groove angle θ1 corresponds to an angle obtained by subtracting the angle of the first groove surface S4 with respect to a plane parallel to the first regulating end 11 from 90°. Therefore, for example, the angle scale 12 has a scale in which a position above the reference axis B1 is 0°, and a position on a line segment that includes the reference axis B1 and is parallel to the first regulating end 11 is 90°. The first piece 10 includes a support 13 that extends from the plate surface in the reference axis B1 direction. In this embodiment, the support 13 is integrally formed with the main body of the first piece 10.

[0018] The second piece 20 includes a second restricting end 21 that contacts the work surface S1 and a third restricting end 22 that contacts the root surface S3 of the work W. The third restricting end 22 is perpendicular to the second restricting end 21. More specifically, the second piece 20 has an L-shape. The second piece 20 has a first extending portion 20a extending in a first direction X and a second extending portion 20b extending in a second direction Y perpendicular to the first direction X. The first direction X is a direction parallel to the work surface S1 when measuring the groove dimension, and the second direction Y is a thickness direction of the work W when measuring the groove dimension.

[0019] The second regulating end 21 is the inner end in the second direction of the first extending portion 20a. The inner side in the second direction is the extending direction of the second extending portion 20b. The third regulating end 22 is the inner end in the first direction of the second extending portion 20b. The inner side in the first direction is the extending direction of the first extending portion 20a. Furthermore, the second piece 20 includes a length scale 23 on the surface along the third regulating end 22. The length scale 23 has a scale in which the position in the second direction that is the same as the second regulating end 21 is set to 0, and the value increases toward the tip of the second extending portion 20b.

[0020] The second piece 20 includes a long hole 24 that is long in a direction along the second restricting end 21, i.e., in the first direction. When the support 13 of the first piece 10 is inserted into the long hole 24, the second piece 20 is movable relative to the first piece 10 in the direction along the second restricting end 21.

[0021] The third piece 30 is supported rotatably around the reference axis B1 relative to the first piece 10. The third piece 30 includes a fourth regulating end 31 that abuts against the first groove surface S4 of the workpiece W on the first end 30a side of the longitudinal direction from the reference axis B1. Furthermore, the third piece 30 includes an angle indicating portion 32 for indicating the angle of the fourth regulating end 31 relative to the first regulating end 11 on the angle scale 12 on the second end 30b side of the longitudinal direction from the reference axis B1. In the example of FIG. 1, the third piece 30 has a shape such that the second end 30b of the longitudinal direction is located outside the angle scale 12 in a plan view, and the angle indicating portion 32 formed on the second end 30b of the longitudinal direction indicates the angle scale 12 from the outside to the inside in the longitudinal direction.

[0022] However, the configuration of the angle indicating portion 32 is not limited to this. For example, the third piece 30 may have a bar shape between the second longitudinal end 30b and the reference axis B1, and the bar-shaped portion may simply have a length that intersects with the angle scale 12 in a plan view, thereby realizing the angle indicating portion 32. Also, for example, the third piece 30 may have a bar shape between the second longitudinal end 30b and the reference axis B1, and the bar shape may have a length that positions the second longitudinal end 30b on the inside of the angle scale 12 in a plan view, and the angle indicating portion 32 formed at the second longitudinal end 30b may have a shape that indicates the angle scale 12 from the inside toward the outside in the longitudinal direction.

[0023] The third piece 30 includes a hole 33 through which the support 13 is inserted. When the support 13 of the first piece 10 is inserted into the hole 33 of the third piece 30, the third piece 30 is supported rotatably around the reference axis B1 relative to the first piece 10.

[0024] Furthermore, the groove dimension gauge 1 includes a fixture 40 fitted to the support 13. For example, the support 13 has a screw thread formed at least at the tip in the reference axis B1 direction. In this case, the fixture 40 is configured by a nut or the like that screws onto the screw thread. The fixture 40 is fixed to the support 13 in a state in which the support 13 is inserted through the long hole 24 of the second piece 20 and the hole 33 of the third piece 30, thereby fixing the positions of the second piece 20 and the third piece 30 relative to the first piece 10. Note that the configuration of the fixture 40 is not limited to this, and various fixtures can be adopted, such as a configuration using a cam lever.

[0025] A method for measuring groove dimensions using the groove dimension gauge 1 in this embodiment will be described below. First, the fixing tool 40 is temporarily fixed to the support 13 with the support 13 of the first piece 10 inserted through the long hole 24 of the second piece 20 and the hole 33 of the third piece 30. In the temporarily fixed state, the second piece 20 is movable in the longitudinal direction of the long hole 24 relative to the first piece 10, and the third piece 30 is rotatable around the reference axis B1 relative to the first piece 10.

[0026] With the groove dimension gauge 1 in a temporarily fixed state, the first piece 10 and the second piece 20 are brought into contact with the workpiece W so that the first regulating end 11 of the first piece 10 and the second regulating end 21 of the second piece 20 each abut against the workpiece surface S1. Next, while maintaining this state, the second piece 20 is moved so that the third regulating end 22 of the second piece 20 abuts against the root surface S3 of the workpiece W. The direction of movement is the extension direction of the first extension portion 20a, i.e., the first direction X.

[0027] With the first regulating end 11 and the second regulating end 21 in contact with the work surface S1 and the third regulating end 22 in contact with the root surface S3 of the work W, the first piece 10 is moved relative to the second piece 20 so that the first direction position of the reference axis B1 coincides with the end of the first groove G1, that is, the first direction position of the corner where the surface S1 and the first groove surface S4 intersect. At this time, for example, while holding the relative position of the second piece 20 with respect to the work W, the fixing tool 40 is gripped and moved in the longitudinal direction of the long hole 24, so that the first piece 10 can be moved relative to the second piece 20. Note that since the third piece 30 is pivotally supported by the first piece 10, the relative movement of the first piece 10 with respect to the second piece 20 also causes the third piece 30 to move relative to the second piece 20.

[0028] The groove dimensions are determined with a tolerance relative to the design value. Therefore, even in a workpiece W having an appropriate groove shape, the groove shape may differ slightly at multiple measurement positions. For example, at multiple measurement positions, the groove depth may differ from one another even if the groove angle is the same, or the groove depth may differ from one another even if the groove angle is the same.

[0029] Since the first piece 10 and the third piece 30 move relative to the second piece 20 due to the long hole 24 formed in the second piece 20, even if the groove shape differs between a plurality of measurement positions, the groove dimension gauge 1 can be adapted to the groove shape of the workpiece W. In other words, regardless of the groove shape of the workpiece W, the abutment between the second regulating end 21 of the second piece 20 and the workpiece surface S1, the abutment between the third regulating end 22 of the second piece 20 and the root surface S3 of the workpiece W, and the abutment between the fourth regulating end 31 of the third piece 30 and the first groove surface S4 of the workpiece W can be simultaneously realized.

[0030] The length of the long hole 24 in the longitudinal direction is set to, for example, a length including the tolerance of the groove dimensions of the grooves G1, G2 formed in the workpiece W to be measured.

[0031] Next, the fourth regulating end 31 of the third piece 30 is brought into contact with the first groove surface S4 of the workpiece W. When the workpiece W is placed with the surface S1 facing up, the third piece 30 rotates around the reference axis B1 by its own weight and moves along the first groove surface S4, that is, the fourth regulating end 31 comes into contact with the first groove surface S4. In this state, the groove angle θ1 of the first groove G1 can be measured by reading the value indicated by the angle indicator 32 on the angle scale 12.

[0032] In this state, the groove depth d1 of the first groove G1 can be measured by reading the value indicated by the lower end of the first groove surface S4 on the length scale 23. In this embodiment, the third piece 30 is configured such that the fourth regulating end 31 and the third regulating end 22 of the second piece 20 intersect with each other when the second regulating end 21, the third regulating end 22, and the fourth regulating end 31 are in contact with the corresponding surfaces S1, S3, and S4 of the workpiece W. Therefore, the groove depth d1 of the first groove G1 can also be measured by reading the length scale 23 at the position where the fourth regulating end 31 of the third piece 30 and the third regulating end 22 of the second piece 20 intersect with each other when the fourth regulating end 31 is in contact with the first groove surface S4.

[0033] Regarding the positional relationship in the thickness direction, in this embodiment, the second piece 20 is located between the first piece 10 and the third piece 30. This allows the intersection position of the fourth restriction end 31 and the third restriction end 22 on the length scale 23 to be accurately read regardless of the thickness of the second piece 20.

[0034] In this state, the root thickness d3 can be measured by reading the value indicated by the upper end and the value indicated by the lower end of the root face S3 on the length scale 23. The groove angle θ2 and groove depth d2 of the second groove G2 can be measured by abutting the first regulating end 11 and the second regulating end 21 against the back surface S2 of the workpiece W again.

[0035] According to the above configuration, it is possible to simultaneously measure the groove angle θ1, the groove depth d1, and the root thickness d3 without using multiple gauges, using one groove dimension gauge 1. Therefore, the measurement position of the groove angle θ1, the measurement position of the groove depth d1, and the measurement position of the root thickness d3 can be aligned.

[0036] When measuring these groove dimensions, the fixing tool 40 may be tightened to fix the positions of the second piece 20 and the third piece 30 relative to the first piece 10. This maintains the positional relationship of the second piece 20 and the third piece 30 relative to the first piece 10 during measurement, so that the groove angles θ1, θ2 and the groove depths d1, d2 can be read even if the groove dimension gauge 1 is moved away from the workpiece W as shown in FIG. 2 from the state shown in FIG. 1. This allows the groove gauge 1 to be moved away from the workpiece W and the angle scale 12 and the length scale 23 to be read at hand by fixing the positional relationship of the three pieces with the fixing tool 40, even if it is difficult to read the angle scale 12 or the length scale 23 in a state where the groove dimension gauge 1 is in contact with the workpiece W, and the occurrence of misreading can be suppressed.

[0037] In this embodiment, the groove dimension gauge 1 includes brackets 50a and 50b. The brackets include a first angle bracket 50a and a second angle bracket 50b. FIG. 4 is an exploded side view of the groove dimension gauge shown in FIG. 1. FIG. 5 is a side view showing a state in which the groove dimension gauge is abutted against a workpiece having a curved surface. In both FIG. 4 and FIG. 5, a view seen from the left side toward the surface of the groove dimension gauge 1 is shown. Note that the fixing device 40 is omitted in FIG. 5.

[0038] The first angle bracket 50a extends from the outer surface of the first piece 10 along the first regulating end 11 and has a first regulating surface 51a perpendicular to the outer surface of the first piece 10. More specifically, the first angle bracket 50a includes a first portion 52a having a surface parallel to the outer surface of the first piece 10 and fixed to the outer surface of the first piece 10, and a second portion 53a perpendicular to the first portion 52a and having the first regulating surface 51a. The first regulating surface 51a forms a surface without a step with the first regulating end 11. Therefore, when the first regulating end 11 abuts against the work surfaces S1 and S2, the first regulating surface 51a also abuts against the work surfaces S1 and S2.

[0039] The second angle bracket 50b has a second regulating surface 51b that is perpendicular to the outer surface of the second piece 20 along the second regulating end 21 from the outer surface of the second piece 20. More specifically, the second angle bracket 50b includes a first portion 52b that has a surface parallel to the outer surface of the second piece 20 and is fixed to the outer surface of the second piece 20, and a second portion 53b that is perpendicular to the first portion 52b and has the second regulating surface 51b. The second regulating surface 51b forms a surface that is not stepped with the second regulating end 21. Therefore, when the second regulating end 21 abuts against the work surfaces S1 and S2, the second regulating surface 51b also abuts against the work surfaces S1 and S2.

[0040] The outer surface of the first piece 10 and the outer surface of the second piece 20 refer to the surface opposite to the inner surface when the opposing surfaces between the first piece 10 and the second piece 20 are defined as the respective inner surfaces. In this embodiment, the outer surface of the first piece 10 is the surface opposite to the surface with the angle scale 12, i.e., the back surface. The outer surface of the second piece 20 is the surface with the length scale 23.

[0041] In this manner, the brackets 50a, 50b form the regulating surfaces 51a, 51b perpendicular to the plate-like first piece 10 and second piece 20. Therefore, when the first regulating end 11 and the second regulating end 21 are brought into contact with the work surfaces S1, S2, it is possible to suppress wobbling of the groove dimension gauge 1 relative to the work W.

[0042] Furthermore, the brackets 50a, 50b can change the angle of the regulating surfaces 51a, 51b relative to the outer surface of the first piece 10 or the second piece 20 by elastic deformation. Therefore, when the regulating surfaces 51a, 51b abut against the work surfaces S1, S2, they can deform to follow the shapes of the work surfaces S1, S2. For example, as shown in FIG. 5, even if the work W has a curved surface, it is possible to suppress wobbling of the groove dimension gauge 1 relative to the work W while abutting the first regulating end 11 and the second regulating end 21 of the groove dimension gauge 1 perpendicularly against the work surfaces S1, S2.

[0043] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various improvements, changes, and modifications are possible without departing from the spirit and scope of the present disclosure.

[0044] [Other embodiments] For example, in the above embodiment, an example was given of the second piece 20 including an elongated hole 24 through which the support 13 of the first piece 10 is inserted, but the elongated hole 24 may also be a round hole similar to the hole 33 in the third piece 30.

[0045] In addition, in the above embodiment, an example is given of a form in which the third piece 30 has a length that allows the fourth regulating end 31 to intersect with the third regulating end 22 of the second piece 20 during measurement, but the fourth regulating end 31 and the third regulating end 22 do not have to intersect during measurement, i.e., when the second regulating end 21, the third regulating end 22 and the fourth regulating end 31 are in contact with the corresponding surfaces of the workpiece W.

[0046] In the above embodiment, the brackets 50a, 50b are fixed to the back surface of the first piece 10 and the front surface of the second piece 20, respectively, but only one of the brackets may be used. Also, instead of the elastically deformable angle bracket exemplified in the above embodiment, a non-elastically deformable bracket such as a block-shaped bracket may be fixed. Also, the brackets 50a, 50b may be detachable. Also, the brackets 50a, 50b may not be required.

[0047] In the above embodiment, an example has been shown in which the support 13 is integrally formed with the first piece 10, but the first piece 10 and the support 13 may be configured separately. In this case, the support 13 may support the first piece 10, the second piece 20, and the third piece 30 so that they can rotate relatively around the reference axis B1. For example, the support 13 may be a general-purpose screw or the like. Alternatively, the support 13 may be integrally formed with the third piece 30, and a hole through which the support 13 is inserted may be formed in the first piece 10.

[0048] In the above embodiment, the first piece 10, the second piece 20, and the third piece 30 are each a plate-like body having a constant thickness, but this is not limiting. Fig. 6 is a conceptual diagram of attachment of a groove dimension gauge according to a modified example of this embodiment.

[0049] 6, the groove dimension gauge 1B is configured so that the display surface 12a of the angle scale 12 of the first piece 10B and the surface of the second piece 20 are substantially flush with each other when the first piece 10B and the second piece 20 are overlapped, and the abutment surface 12b of the first piece 10B with the second piece 20 is lower than the display surface 12a. The step surface 14 connecting the display surface 12a of the first piece 10 and the abutment surface 12b is parallel to the first regulating end 11.

[0050] In the configuration of this modification, the display surface 12a of the first piece 10B and the surface of the second piece 20 are almost the same surface, so that the angle indicator 32 of the third piece 30 arranged on the surface side of the second piece 20 can be brought closer to the display surface 12a of the first piece 10B. Therefore, the reading error of the groove angles θ1 and θ2 can be reduced. Furthermore, in a state where the back surface of the first extension portion 20a of the second piece 20 is in contact with the contact surface 12b of the first piece 10B, the upper end of the first extension portion 20a of the second piece 20 can be in contact with the step surface 14 of the first piece 10B, so that the step surface 14 can be used as a guide when moving the second piece 20 in the longitudinal direction of the long hole 24 relative to the first piece 10B. That is, when the second piece 20 is moved relative to the first piece 10B, the upper end of the first extension portion 20a of the second piece 20 slides on the step surface 14 of the first piece 10B, causing the second piece 20 to move straight along the first direction X.

[0051] Additionally, the third piece 30 may at least partially include a rod-shaped body such as a rectangular column or a cylindrical column.

[0052] In the above embodiment and the above modified example, the second piece 20 is positioned between the first piece 10 and the third piece 30, but the present invention is not limited to this. For example, the groove dimension gauge 1 may be configured so that the third piece 30 is positioned between the first piece 10 and the second piece 20, or the groove dimension gauge 1 may be configured so that the first piece 10 is positioned between the second piece 20 and the third piece 30.

[0053] Moreover, the materials of the first piece 10, the second piece 20, and the third piece 30 are not particularly limited. For example, in order to ensure heat resistance, each piece may be formed from a metal material such as stainless steel. The groove dimension gauge 1 can be easily manufactured by cutting each piece out from a metal plate. It may also be formed from a light-transmitting material having heat resistance. If heat resistance is not required, it may be formed from a light-transmitting resin such as an acrylic resin. By forming it from a material having light transmission, it is possible to easily read the intersection position between the fourth regulating end 31 and the third regulating end 22 on the length scale 23 regardless of the positional relationship between the third piece 30 and the second piece 20. Also, at least some of the pieces 10, 20, and 30 may be formed from a material different from the other pieces. For example, the first piece 10 and the second piece 20 may be formed from a metal material, and the third piece 30 may be formed from a light-transmitting material.

[0054] [Summary of this disclosure] [Item 1] A groove dimension gauge according to one embodiment of the present disclosure is a groove dimension gauge for measuring the angle of a groove formed in a workpiece and the depth or root thickness of the groove, and includes a plate-shaped first piece including a first regulating end that abuts against the workpiece surface on which the groove is formed, a plate-shaped second piece including a second regulating end that abuts against the workpiece surface and a third regulating end that is perpendicular to the second regulating end so as to abut against the root surface of the workpiece, and a third piece that is supported rotatably around a predetermined reference axis relative to the first piece, wherein the first piece includes an angle scale indicating an angle around the reference axis relative to the first regulating end, the second piece includes a length scale along the third regulating end, and the third piece includes a fourth regulating end that abuts against the groove surface of the workpiece on the first end side of the longitudinal direction from the reference axis, and an angle indicating portion that indicates on the angle scale the angle of the fourth regulating end relative to the first regulating end on the second end side of the longitudinal direction from the reference axis.

[0055] According to the above configuration, the groove angle and the groove depth or the root thickness can be measured at once using one groove dimension gauge without using multiple gauges. Therefore, the measurement position of the groove angle can be aligned with the measurement position of the groove depth or the measurement position of the root thickness.

[0056] [Item 2] In the groove dimension gauge of item 1, the first piece may include a support extending from the plate surface in the reference axis direction, the second piece may include a long hole through which the support is inserted and which is long in a direction along the second regulating end, and the third piece may include a hole through which the support is inserted. The long hole formed in the second piece allows the first piece and the third piece to move relative to the second piece, so that even if the groove shape differs between multiple measurement positions, the groove dimension gauge can be adapted to the groove shape of the workpiece. In other words, regardless of the groove shape of the workpiece, the second regulating end of the second piece can abut against the workpiece surface, the third regulating end of the second piece can abut against the root surface of the workpiece, and the fourth regulating end of the third piece can abut against the groove surface of the workpiece simultaneously.

[0057] [Item 3] The groove dimension gauge of item 2 may include a fixture that is fitted to the support and fixes the positions of the second piece and the third piece relative to the first piece. This maintains the positional relationship of the second piece and the third piece relative to the first piece during measurement, so that at least the groove angle value can be read even if the groove dimension gauge is separated from the workpiece. This allows the scale to be read when the groove dimension gauge is separated from the workpiece, and makes it possible to prevent misreading.

[0058] [Item 4] The groove dimension gauge of item 1 includes a support extending in the reference axis direction, the support supporting the first piece, the second piece, and the third piece so as to be relatively rotatable around the reference axis, and the second piece may include a long hole through which the support is inserted and which is long in a direction along the second regulating end. The long hole formed in the second piece allows the first piece and the third piece to move relative to the second piece, so that even if the groove shape differs between multiple measurement positions, the groove dimension gauge can be adapted to the groove shape of the workpiece. In other words, regardless of the groove shape of the workpiece, the second regulating end of the second piece can abut against the workpiece surface, the third regulating end of the second piece can abut against the root surface of the workpiece, and the fourth regulating end of the third piece can abut against the groove surface of the workpiece at the same time.

[0059] [Item 5] In the groove dimension gauge according to any one of items 1 to 4, the fourth regulating end of the third piece may intersect with the third regulating end of the second piece in a state in which the second regulating end, the third regulating end, and the fourth regulating end are in contact with the corresponding surfaces of the work. With this, the groove depth can be measured by reading the length scale at the position where the fourth regulating end of the third piece intersects with the third regulating end of the second piece in a state in which the fourth regulating end is in contact with the groove surface.

[0060] [Item 6] In the groove dimension gauge of item 4, the second piece may be located between the first piece and the third piece. With this, the intersection position of the fourth regulating end and the third regulating end on the length scale can be accurately read regardless of the thickness of the second piece.

[0061] [Item 7] The groove dimension gauge according to any one of items 1 to 6 may include a bracket fixed to an outer surface of the first piece or the second piece and having a regulating surface extending along the first regulating end or the second regulating end. In this way, the bracket forms a regulating surface perpendicular to the plate-like first piece and second piece. Therefore, when the first regulating end and the second regulating end are brought into contact with the work surface, it is possible to suppress wobbling of the groove dimension gauge relative to the work.

[0062] [Item 8] In the groove dimension gauge of item 7, the bracket may be capable of changing the angle of the regulating surface relative to the outer surface of the first piece or the second piece by elastic deformation. With this, when the regulating surface abuts against the work surface, it can deform to follow the shape of the work surface. Therefore, even if the work has a curved surface, it is possible to suppress wobbling of the groove dimension gauge relative to the work while abutting the first and second regulating ends of the groove dimension gauge perpendicularly against the work surface. [Explanation of symbols]

[0063] 1,1B Groove Dimension Gauge 10,10B 1st piece 11 First Regulatory Terminal 12 Angle scale 13 Support 20 2nd Piece 21 Second Regulatory Terminal 22 Third Regulatory Terminal 23 Length scale 24 long hole 30 3rd Piece 30a 1st end 30b 2nd end 31 4th Regulatory Terminal 32 Angle indicator 33 holes 40 Fixtures 50a,50b bracket 51a,51b Regulatory aspects B1 Reference axis Double work

Claims

1. A groove dimension gauge for measuring the angle of a groove formed in a workpiece and the depth or root thickness of the groove, A plate-shaped first piece including a first restricting end that is brought into contact with the work surface on which the groove is formed; a plate-shaped second piece including a second regulating end that abuts against the work surface and a third regulating end that is perpendicular to the second regulating end so as to abut against the root surface of the work; a third piece supported rotatably about a predetermined reference axis relative to the first piece, the first piece includes an angle scale indicating an angle around the reference axis with respect to the first restriction end, the second piece includes a length scale along the third limiting end, The third piece is A fourth regulating end that abuts against the groove surface of the workpiece on the first end side in the longitudinal direction from the reference axis; and an angle indicating portion indicating an angle of the fourth regulating end relative to the first regulating end on the angle scale at a second longitudinal end side from the reference axis.

2. The first piece includes a support extending from a plate surface in the reference axis direction, the second piece includes a slot through which the support is inserted and which is long in a direction along the second restriction end, The groove dimension gauge according to claim 1 , wherein the third piece includes a hole through which the support body is inserted.

3. The groove dimension gauge according to claim 2 , further comprising a fastener fitted to the support body for fixing positions of the second piece and the third piece relative to the first piece.

4. A support extending in the reference axis direction is provided, the support member supports the first piece, the second piece, and the third piece so as to be rotatable relative to one another around the reference axis; The groove dimension gauge according to claim 1 , wherein the second piece includes a slot through which the support body is inserted and which is long in a direction along the second regulating end.

5. 5. A groove dimension gauge as described in any one of claims 1 to 4, wherein the third piece has a fourth regulating end that intersects with the third regulating end of the second piece when the second regulating end, the third regulating end and the fourth regulating end are in contact with corresponding surfaces of the workpiece.

6. The groove dimension gauge according to claim 5 , wherein the second piece is located between the first piece and the third piece.

7. The groove dimension gauge according to any one of claims 1 to 4, further comprising a bracket fixed to an outer surface of the first piece or the second piece and having a control surface extending along the first control end or the second control end.

8. The groove dimension gauge according to claim 7 , wherein the bracket is capable of changing an angle of the control surface relative to an outer surface of the first piece or the second piece by elastic deformation.

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