JP2024048951A - Clearance gauge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clearance gauge capable of easily and accurately grasping at least clearance between objects by simple operation.

SOLUTION: A clearance gauge 10A includes: a first gauge unit 11 including a first taper unit 12 having a pair of first oblique sides 12a, 12a for forming a taper shape toward an insertion direction; a second gauge unit 15 that has a pair of second oblique sides 16a, 16a for forming a taper shape toward an insertion direction and includes a second taper unit 16 overlapped to the first taper unit 12 slidably along an insertion direction; and a first display unit 31 for displaying a relative amount of deviation between the first taper unit 12 and the second taper unit 16. A first vertical angle θ1 and a second vertical angle θ2 are in an angle relationship in which the amount of deviation satisfies a condition that it is equal to an interval G between two intersections B, C in which the pair of first oblique sides 12a, 12a and the pair of second oblique sides 16a, 16a cross.

SELECTED DRAWING: Figure 1A

COPYRIGHT: (C)2024,JPO&INPIT

Description

This disclosure relates to a feeler gauge that measures the width of a groove (bevel).

There are many different methods for measuring the width of a gap, including, for example, a method using a taper gauge with a scale and a method using multiple gauge plates with various thicknesses. In this regard, Patent Document 1 discloses a gap measuring instrument equipped with a taper gauge that is inserted into the gap to be measured.

Japanese Patent Application Laid-Open No. 61-105403

In welding work, for example, if the width of the groove between the base materials is excessively large, the amount of melting of the welding rod and base materials increases, which not only increases the welding labor hours and solvent costs, but also makes it easier for the mechanical properties of the welded area to change and for the base materials to become distorted. Conversely, if the groove width is excessively narrow, it is more likely to cause workability to decrease, melting to progress poorly, and poor welding. Therefore, in order to obtain the optimal shape and width of the groove, it is important to accurately measure the dimensions of the groove using a feeler gauge or similar.

When welding large structures such as ships, the dimensions of the base material are large, and during the construction process, steel welds are present in many places, including high places, narrow areas, and wall surfaces, and there are many measurement points for the grooves, with many different shapes.

As a result, welding work processes are carried out simultaneously in various places, and groove dimensions must be measured quickly and accurately before they are affected by expansion and contraction due to welding in other places or temperature changes, and if any defects are found, they must be repaired immediately.

In addition, when it comes to the measurement posture, there are many places where it is difficult to peer into the recessed groove shape to check the values, and considering the on-site environment, bringing in precision equipment and large gauges not only poses the risk of instrument damage, but also the physical strain and safety of the person carrying the gauges.

As there are many measurement points, the person who measures is not specified, and there are cases where multiple people measure at the same time. Therefore, it is important for quality control that the system can be easily used even by people without measurement skills, and that measurement errors are eliminated not only when the person who measures is different, but also when the groove shape is different.

This disclosure was made in consideration of the above circumstances, and aims to provide a gap gauge that can easily and accurately measure the distance between objects with simple operations.

A feeler gauge according to one aspect of the present disclosure includes a first gauge section including a first tapered section formed in a plate shape and having a pair of first oblique sides that form a tapered shape toward the insertion direction, a second gauge section including a second tapered section formed in a plate shape and having a pair of second oblique sides that form a tapered shape toward the insertion direction and that is slidably superimposed on the first tapered section along the insertion direction, and a first display section that displays the relative amount of deviation between the first tapered section and the second tapered section that occurs between a first state in which the position of the first apex angle and the position of the second apex angle coincide with each other, and a second state in which a relative deviation occurs between the first tapered section and the second tapered section along the insertion direction, and the first apex angle and the second apex angle have an angular relationship that satisfies a condition that the amount of deviation is equal to the distance between two intersection points where the pair of first oblique sides and the pair of second oblique sides intersect.

According to the present disclosure, it is possible to provide a gap gauge that can easily grasp the distance between at least two objects with a simple operation.

FIG. 2 is a front view of the feeler gauge according to the first embodiment. FIG. 2 is a side view of the feeler gauge according to the first embodiment. 4A to 4C are diagrams for explaining the angular relationship between the apex angles of a first tapered portion and a second tapered portion of the feeler gauge according to the first embodiment. 1A to 1C are diagrams showing a process for measuring the gap between grooves using a gap gauge according to the first embodiment. 1A to 1C are diagrams showing a process for measuring the gap between grooves using a gap gauge according to the first embodiment. 1A to 1C are diagrams showing a process for measuring the gap between grooves using a gap gauge according to the first embodiment. FIG. 11 is a perspective view of a feeler gauge according to a second embodiment. FIG. 11 is a diagram showing a first example of use of the feeler gauge according to the second embodiment. FIG. 11 is a diagram showing a second example of use of the feeler gauge according to the second embodiment. 11A and 11B are perspective views of a feeler gauge according to a third embodiment, in which (a) is a perspective view of a first example, and (b) is a perspective view of a second example. FIG. 13 is a front view of a feeler gauge according to a fourth embodiment. FIG. 13 is a front view of a gap gauge according to a fifth embodiment. FIG. 13 is a front view of the gap gauge according to the fifth embodiment in a state in which the first tapered portion and the second tapered portion are folded. FIG. 13 is a front view of a feeler gauge according to a sixth embodiment.

Several embodiments of the present disclosure will be described with reference to the drawings. In addition, common parts in each figure are given the same reference numerals, and duplicated explanations will be omitted. For convenience of explanation, the X direction, Y direction, and Z direction, which are mutually perpendicular, are defined. The X direction and the Y direction are the extension directions of the first base material 2 and the second base material 4. The first base material 2 and the second base material 4 are provided on both sides of the groove 6 to be welded. The groove 6 is assumed to extend in the Y direction. The Z direction is the insertion direction of the feeler gauge 10A, and is parallel to the extension direction of the central axis 3 of the feeler gauge 10A.

First Embodiment
First, the first embodiment will be described.
Fig. 1A is a front view of a feeler gauge 10A according to this embodiment. Fig. 1B is a side view of the feeler gauge 10A. Fig. 2 is a diagram for explaining the angular relationship between the apex angles of a first tapered portion 12 and a second tapered portion 16 of the feeler gauge 10A.

Below, an example will be described in which the gap gauge 10A according to this embodiment measures the gap (width) G of the groove 6 formed between the first base material 2 and the second base material 4. The first base material 2 and the second base material 4 are joined by a welding process on the groove 6.

The end 2a of the first base material 2 and the end 4a of the second base material 4 are butted together in the X direction with a gap G between them to form a groove 6. This gap G is the minimum width of the groove 6 along the X direction. The groove 6 is a groove extending in the Y direction, and has, for example, a substantially V-shaped cross section whose width in the X direction increases toward the gap gauge 10A. This cross-sectional shape is formed in advance by end surface processing of the first base material 2 and the second base material 4.

When measuring the gap G of the groove 6, the gap gauge 10A is inserted into the groove 6 along the Z direction. When the gap gauge 10A contacts the groove 6, a relative misalignment occurs between the first tapered portion 12 and the second tapered portion 16. In the gap gauge 10A of this embodiment, the amount of misalignment along the Z direction corresponds to the gap G of the groove 6. In other words, the gap G of the groove 6 can be determined by checking the amount of misalignment.

Figure 1A is a front view of a gap gauge 10A according to this embodiment. As shown in Figure 1A, the gap gauge 10A has a first gauge section 11. The first gauge section 11 includes a first tapered section 12, a support section 13, and a protruding section 14.

The first tapered portion 12 is formed in a plate shape having a predetermined thickness in the Y direction, and has a pair of first oblique sides (first inclined surfaces) 12a, 12a that form a tapered shape toward the Z direction (insertion direction). The pair of first oblique sides 12a, 12a are inclined with respect to the central axis 3 so as to form a first apex angle θ ₁ (see FIG. 2). The central axis 3 is a bisector of the first apex angle θ _1. The first apex angle θ ₁ is set to a value larger than a second apex angle θ ₂ of the second tapered portion 16 described later. The tip 12b of the first tapered portion 12 (in other words, the first gauge portion 11) may be formed sharply or may be cut out by a predetermined length. When cut out by a predetermined length, the first apex angle θ ₁ is the angle formed by the extension lines of the first oblique sides 12a, 12a at the intersection of the extension lines.

The support portion 13 is formed integrally with the first taper portion 12 and extends from the first taper portion 12 in the opposite direction to the Z direction. The support portion 13 has, for example, a predetermined width along the X direction and a predetermined length along the Z direction. Like the first taper portion 12, the support portion 13 is also formed in a plate shape.

The protrusion 14 protrudes from the support 13 in the Y direction, has a predetermined width narrower than the support 13 along the X direction, and has a predetermined length along the Z direction. The protrusion 14 is slidably positioned within the groove 17 of the second gauge 15 described below. Therefore, the width of the protrusion 14 is set to a value slightly smaller than the width of the groove 17 of the second gauge 15. The protrusion 14 and the groove 17 function as guides that enable the two gauges to move (slide) relative to each other along the Z direction. The protrusion 14 may be formed integrally with the support 13, or may be formed separately from the support 13 and attached to the support 13.

As shown in FIG. 1A, the gap gauge 10A includes a second gauge portion 15 that is overlapped with the first gauge portion 11 in the Y direction. The second gauge portion 15 is formed in a plate shape having a predetermined thickness in the Y direction, and is overlapped with the first tapered portion 12 so as to be slidable along the Z direction (insertion direction). The second gauge portion 15 has a second tapered portion 16. The second tapered portion 16 has a pair of second oblique sides (second inclined surfaces) 16a, 16a that form a tapered shape toward the Z direction (insertion direction). The pair of second oblique sides 16a, 16a are inclined with respect to the central axis 3 so as to form a second apex angle θ ₂ (see FIG. 2). The central axis 3 is a bisector of the second apex angle θ _2. The tip 16b of the second tapered portion 16 (in other words, the second gauge portion 15) may be formed sharply or may be cut out by a predetermined length. When the cutout is of a predetermined length, the second apex angle _θ2 is the angle formed by the extension lines of the second oblique sides 16a, 16a at the intersection of the extension lines.

The second gauge section 15 is provided with a groove section 17. The groove section 17 has a width slightly wider than the protrusion section 14 of the first gauge section 11, and extends from the stopper section 18 in the opposite direction to the Z direction. The stopper section 18 is the inner surface that is closest to the tip 16b among the inner surfaces that form the groove section 17, and is provided so as to be able to abut against the tip section 14a of the protrusion section 14. The stopper section 18 is located at a position where the stopper section 18 and the tip section 14a of the protrusion section 14 abut when the tip section 12b of the first gauge section 11 and the tip section 16b of the second gauge section 15 coincide with each other. In other words, when the tip section 14a of the protrusion section 14 abuts against the stopper section 18, the tip section 12b of the first gauge section 11 and the tip section 16b of the second gauge section 15 are located at the same position in the Z direction.

The feeler gauge 10A includes a first display unit 31. The first display unit 31 displays the amount of relative deviation between the first taper portion 12 and the second taper portion 16 that occurs between a first state and a second state. The first state refers to a state in which the position of the first apex angle _θ1 and the position of the second apex angle _θ2 are coincident. The second state refers to a state in which a relative deviation occurs between the first taper portion 12 and the second taper portion 16 along the Z direction (insertion direction). That is, the first display unit 31 displays the amount of relative deviation between the first taper portion 12 and the second taper portion 16 when the first state is changed to the second state, or vice versa.

As shown in FIG. 1A, the first display unit 31 may be a measuring instrument such as a digital gauge that is attached to one of the first gauge unit 11 and the second gauge unit 15 and has a display panel or screen that measures the amount of movement of the other of the first gauge unit 11 and the second gauge unit 15 and displays the value. Alternatively, the first display unit 31 may be composed of a plurality of scales 31a arranged at equal intervals and a predetermined mark 31b. In this case, the plurality of scales 31a are arranged at equal intervals in the Z direction on one of the first gauge unit 11 and the second gauge unit 15. The mark 31b is arranged on the other of the first gauge unit 11 and the second gauge unit 15 and is located at a position that overlaps with the arrangement of the scales. For example, as shown in FIG. 1A, the end 15a of the second gauge unit 15 may function as the mark 31b.

The first apex angle _θ1 of the first tapered portion 12 and the second apex angle _θ2 of the second tapered portion 16 have a predetermined angular relationship. This predetermined angular relationship satisfies the condition that the relative deviation amount M between the first tapered portion 12 and the second tapered portion 16 is equal to the distance G between two intersection points B, C where the pair of first oblique sides 12a, 12a and the pair of second oblique sides 16a, 16a intersect. The apex angle is the angle formed by the pair of oblique sides or their extensions, and the distance G corresponds to the minimum width of the groove 6.

This angular relationship will be described in detail. For ease of explanation, the tip 12b of the first tapered portion 12 is not cut out, and the pair of first oblique sides 12a, 12a intersect at a first apex angle _θ1 . Similarly, the tip 16b of the second tapered portion 16 is not cut out, and the pair of second oblique sides 16a, 16a intersect at a second apex angle _θ2 .

Figure 2 shows the state in which the first tapered portion 12 and the second tapered portion 16 are inserted into the groove 6 with a gap G. At this time, the first tapered portion 12 and the second tapered portion 16 are shifted by a shift amount M along the Z direction, and the pair of first oblique sides 12a, 12a and the pair of second oblique sides 16a, 16a abut against the end 2a of the first base material 2 and the end 4a of the second base material 4 at their intersections B and C.

ここでｇ＝Ｇ／２であり、Ａは２つの交点Ｂ、Ｃを結ぶ線ＢＣから、第２テーパ部１６の先端１６ｂまでのＺ方向に沿った距離である。換言すれば、Ａは開先６から突出（露出した第２テーパ部１６の長さである。 The first apex angle θ ₁ of the first tapered portion 12 and the second apex angle θ ₂ of the second tapered portion 16 satisfy the following formula (1).

Here, g = G/2, and A is the distance along the Z direction from the line BC connecting the two intersections B and C to the tip 16b of the second tapered portion 16. In other words, A is the length of the second tapered portion 16 protruding (exposed) from the groove 6.

が得られる。つまり、第１頂角θ_１と第２頂角θ_２の角度関係は式（２）を満たす。この条件下では２つの交点Ｂ、Ｃ間の間隔、即ち、開先６の間隔Ｇは、第１テーパ部１２と第２テーパ部１６の相対的なずれ量Ｍに等しい。従って、ずれ量Ｍを計測した場合、その値は開先６の間隔Ｇを示すことになる。ずれ量Ｍは、第１表示部３１に表示される、或いは第１表示部３１としての目盛から読み取ることができる。 By imposing the above condition, the distance G (=2g) and the amount of deviation M are equal. Therefore, by eliminating G, M, and A from the formula (1),

is obtained. In other words, the angular relationship between the first apex angle θ ₁ and the second apex angle θ ₂ satisfies the formula (2). Under this condition, the distance between the two intersections B and C, that is, the distance G of the groove 6, is equal to the relative deviation amount M between the first tapered portion 12 and the second tapered portion 16. Therefore, when the deviation amount M is measured, the value indicates the distance G of the groove 6. The deviation amount M is displayed on the first display unit 31, or can be read from the scale as the first display unit 31.

In addition, since the measured deviation amount M is equal to the interval G, the first display unit 31 only needs to display the deviation amount M, and there is no need to convert the deviation amount M to a predetermined multiple, etc. Therefore, a commercially available measuring device such as a digital gauge or scale can be used as is as the first display unit 31.

3A to 3C are diagrams showing a process for measuring the gap G of the groove 6 using the gap gauge 10A. For convenience of explanation, the first display unit 31 is omitted. FIG. 3A shows the state before the gap gauge 10A is inserted into the groove 6. The groove 6 opens in a V-shape toward the gap gauge 10A (in the opposite direction to the Z direction), and the opening angle has a value equal to or greater than the first apex angle θ ₁ of the first tapered portion 12.

First, as shown in Fig. 3A, the gap gauge 10A is brought close to the groove 6 along the Z direction with the tip 12b of the first tapered portion 12 and the tip 16b of the second tapered portion 16 facing the groove 6. At this time, in the example shown in Fig. 3A, it is assumed that no relative deviation occurs. That is, the first tapered portion 12 and the second tapered portion 16 are placed in a first state in which the position of the tip 12b and the position of the tip 16b coincide (i.e., the position of the first apex angle θ ₁ and the position of the second apex angle θ ₂ coincide).

The feeler gauge 10A is brought even closer to the groove 6, and the tip 12b of the first tapered portion 12 and the tip 16b of the second tapered portion 16 are inserted into the groove 6. In the example shown in FIG. 3B, the gap G of the groove 6 is set to a relatively wide value. Therefore, each tip passes through the groove 6 and is exposed from the groove 6. When the feeler gauge is further inserted, the first tapered portion 12 abuts against the groove 6 (i.e., the end 2a of the first base material 2 and the end 4a of the second base material 4).

The second apex angle θ ₂ of the second taper portion 16 is smaller than the first apex angle θ ₁ of the first taper portion 12. Therefore, the second taper portion 16 can be further inserted in the Z direction. The second taper portion 16 moves forward in the Z direction from the first taper portion 12, and then abuts against the groove 6 (i.e., the end 2 a of the first base material 2 and the end 4 a of the second base material 4). As a result, the second taper portion 16 is shifted forward in the Z direction from the first taper portion 12 by the shift amount M. That is, the first taper portion 12 and the second taper portion 16 are placed in a second state in which a relative shift occurs between the first taper portion 12 and the second taper portion 16 along the Z direction (insertion direction).

The first display unit 31 displays the amount of deviation M that occurs between the first tapered portion 12 and the second tapered portion 16 between the first state and the second state. As described above, the displayed amount of deviation M is equal to the gap G of the groove 6. Therefore, the operator of the gap gauge 10A can grasp the value displayed on the first display unit 31 as the gap G. In other words, the width of the groove 6 can be accurately read directly by the simple operation described above.

The measurement process may be performed in the reverse order. That is, the first taper portion 12 and the second taper portion 16 are inserted into the groove 6 until the relative positional deviation between them stops, and then removed from the groove 6 while maintaining that deviation. The first display unit 31 displays the amount of deviation M that occurs between the first state and the second state, so the operator of the gap gauge 10A can grasp the value displayed on the first display unit 31 as the gap G.

Second Embodiment
Next, a second embodiment of the present disclosure will be described.
Fig. 4 is a perspective view of the gap gauge 10B according to this embodiment. Fig. 5 is a diagram showing a first use example of the gap gauge 10B. Fig. 6 is a diagram showing a second use example of the gap gauge 10B. As shown in Fig. 4, the gap gauge 10B includes a base portion 21 in addition to the first gauge portion 11, the second gauge portion 15, and the first display portion 31 (see Fig. 1) according to the first embodiment. For ease of explanation, the first display portion 31 is omitted from Figs. 4 to 6.

The base portion 21 supports the first gauge portion 11 so that it can slide along the Z direction (insertion direction). The base portion 21 also includes a contact surface 21a that faces the Z direction (insertion direction) and contacts the surfaces of the first base material 2 and the second base material 4 that are the measurement targets.

The base portion 21 is formed, for example, in a plate shape, and has a pair of legs 28, 28. The base portion 21 extends in the X direction and the Z direction, and has a predetermined thickness in the Y direction. The pair of legs 28, 28 are arranged at a predetermined interval in the X direction so as to straddle the groove 6, and each has the above-mentioned abutment surface 21a. The abutment surface 21a is perpendicular to the Z direction. In other words, the abutment surface 21a is perpendicular to the movement direction of the first gauge portion 11 and the second gauge portion 15.

The gap gauge 10B has a second display section 32. The second display section 32 displays the moving distance N (see Figures 2 and 5) of the first tapered section 12 when the position of the tip 12b of the first tapered section 12 (i.e., the intersection of the pair of first oblique sides 12a, 12a or their extension lines) moves in the Z direction (insertion direction) based on the position on the abutment surface 21a.

The second display unit 32 may be a plurality of scales provided on the base unit 21 and arranged to overlap any edge or scale of the first gauge unit 11. Alternatively, the second display unit 32 may be a measuring device such as a digital gauge attached to the base unit 21 that measures the amount of movement of the first gauge unit 11. In either case, when the tip 12b of the first tapered portion 12 is positioned on the abutment surface 21a, the second display unit 32 indicates zero, and when the tip 12b of the first tapered portion 12 moves in the Z direction from the abutment surface 21a, it indicates the distance of movement N (see Figures 2 and 5).

更に、第１テーパ部１２の第１頂角θ１が、次の式（４）を満たす角度を有する場合、

式（３）は更に簡略化され、次の式（５）で表される。

つまり、移動距離Ｎから開先６の間隔Ｇを減じることによって、直ちに厚さＴを算出できる。 In the second embodiment, the gap G of the groove 6 is also obtained by going through the measurement steps of Figures 3A to 3C. Furthermore, the moving distance N of the first tapered portion 12 at this time is displayed (readable) on the second display unit 32. By substituting these values into the formula (3), the thickness T of the first base material 2 and the second base material 4 can be calculated.

Furthermore, when the first apex angle θ1 of the first tapered portion 12 has an angle that satisfies the following formula (4),

Equation (3) is further simplified and expressed as the following equation (5).

In other words, by subtracting the gap G of the groove 6 from the movement distance N, the thickness T can be immediately calculated.

As shown in Figs. 4 and 6, the base portion 21 may be divided into a first sub-base portion 22 and a second sub-base portion 23. The first sub-base portion 22 and the second sub-base portion 23 are located on one side and the other side of the arrangement of the first taper portion 12 and the second taper portion 16. The first sub-base portion 22 and the second sub-base portion 23 are provided so as to be slidable relative to each other along a direction parallel to the Z direction (insertion direction) by a connecting mechanism using a dovetail groove or the like extending in the Z direction. In this case, the gap gauge 10A is provided with a third display portion 33. The third display portion 33 displays the amount of deviation between the first sub-base portion 22 and the second sub-base portion 23 along the Z direction (insertion direction).

The third display unit 33 may be a number of scales provided on one of the first sub-base unit 22 and the second sub-base unit 23. The number of scales is located near the boundary between the first sub-base unit 22 and the second sub-base unit 23 so that the relative amount of deviation between the first sub-base unit 22 and the second sub-base unit 23 can be confirmed. Alternatively, the third display unit 33 may be a measuring device such as a digital gauge attached to one of the first sub-base unit 22 and the second sub-base unit 23 and measuring the amount of movement of the other of the first sub-base unit 22 and the second sub-base unit 23.

As shown in FIG. 6, for example, when the thickness T2 of the second base material 4 is greater than the thickness T1 of the first base material 2, a step S occurs between the first base material 2 and the second base material 4 at the boundary of the groove 6. As in the first embodiment, the gap gauge 10B is arranged to straddle the groove 6. For example, the first sub-base portion 22 is placed on the first base material 2, and the second sub-base portion 23 is placed on the second base material 4. As described above, the first sub-base portion 22 and the second sub-base portion 23 are provided so as to be slidable relative to each other along a direction parallel to the Z direction. Therefore, the two are misaligned relative to each other by the step S. The third display portion 33 displays this amount of misalignment.

The thickness T1 of the first base material can be calculated by checking the first display section 31 and the second display section 32. Furthermore, the third display section 33 displays the amount of deviation equal to the step S. Therefore, the thickness T2 of the second base material can be calculated as the sum of the thickness T1 of the first base material and the amount of deviation (= step S) indicated by the third display section 33. The obtained difference in plate thickness can be used, for example, when adjusting the amount of melting of the welding rod or the like that enters the groove 6 during welding.

Here, in order to more accurately measure the gap between the grooves 6 using the gap gauge 10B, it is preferable to arrange the movement direction of the first gauge portion 11 and the second gauge portion 15 in a direction perpendicular to the groove 6, i.e., parallel to the Z direction. According to the gap gauge 10B of the second embodiment, the first sub-base portion 22 and the second sub-base portion 23 are configured to be offset from each other by the step S. This allows the movement direction of the first gauge portion 11 and the second gauge portion 15 to be adjusted to be parallel to the Z direction, so that the gap between the grooves 6 can be measured more accurately.

Third Embodiment
Next, a third embodiment of the present disclosure will be described.
7A and 7B are perspective views of a feeler gauge 10C according to this embodiment, where (a) is a perspective view of a first example and (b) is a perspective view of a second example. The feeler gauge 10C according to the third embodiment differs from the first and second embodiments only in the thickness or number of the first tapered portion 12 and the second tapered portion 16. The rest of the configuration can be applied to the configurations of the first and second embodiments. Therefore, for convenience of explanation, FIG. 7 shows only the outer shape of the tapered portion.

The thickness T3 of the first tapered portion 12 and the thickness T4 of the second tapered portion 16 are different from each other. For example, as shown in FIG. 7(a), the first tapered portion 12 may be thicker than the second tapered portion 16. Or, this relationship may be reversed.

For example, when the first tapered portion 12 is formed thicker than the second tapered portion 16, the contact area (contact length) between one of the pair of first oblique sides 12a, 12a of the first tapered portion 12 and the end 2a of the first base material 2 and the contact area (contact length) between the other of the pair of first oblique sides 12a, 12a and the end 4a of the second base material 4 increase. Therefore, the position of the gap gauge 10C relative to the groove 6 can be maintained more stably, making it easier to operate the gap gauge 10C and suppressing measurement errors due to posture wobble.

As shown in FIG. 7(b), the gap gauge 10C may further include a third gauge section 19 including a third tapered section 20 having the same shape as the first tapered section 12. In this case, the second tapered section 16 is located between the first tapered section 12 and the third tapered section 20. As in the example shown in FIG. 7(a), the above-mentioned contact area (contact length) can be increased. Therefore, the same effect as the example shown in FIG. 7(a) can be obtained.

The gap gauge 10C may have multiple pairs of the first gauge portion 11 and the second gauge portion 15 (not shown). These pairs are arranged in the Y direction at a predetermined interval. In this case, the gap G at multiple locations can be measured by simply inserting the gap gauge 10C into the groove 6 once.

Fourth Embodiment
Next, a fourth embodiment of the present disclosure will be described.
FIG. 8 is a front view of a feeler gauge 10D according to this embodiment. As shown in FIG. 8, the first gauge section 11 of the feeler gauge 10D includes a first extension section 24 extending from the first tapered section 12 in the direction opposite to the Z direction (insertion direction). The second gauge section 15 of the feeler gauge 10D includes a second extension section 25 extending from the second tapered section 16 in the direction opposite to the Z direction (insertion direction). Furthermore, the first extension section 24 or the second extension section 25 is provided with a scale as a first indicator 31 for indicating the amount of deviation between the first extension section 24 and the second extension section 25 along the insertion direction. For example, as shown in FIG. 8, this scale is provided at the end of the first extension section 24 or the second extension section 25. The other configurations are the same as those of the first embodiment.

By providing the first extension 24 and the second extension 25, it is possible to measure the groove 6 in places that are normally difficult to measure, such as the ceiling.

Fifth Embodiment
Next, a fifth embodiment of the present disclosure will be described.
Fig. 9A is a front view of the gap gauge 10E according to this embodiment. Fig. 9B is a front view of the gap gauge 10E in a state in which the first tapered portion 12 and the second tapered portion 16 are folded. For ease of explanation, the first display portion 31 is omitted from these figures.

As shown in Figures 9A and 9B, the first tapered portion 12 of the gap gauge 10E is configured to be foldable around the central axis 3 of the gap gauge 10E along the Z direction. For example, the first tapered portion 12 is provided with a hinge portion 26 that straddles the central axis 3.

The second tapered portion 16 of the gap gauge 10E is also configured to be foldable around the central axis 3 of the gap gauge 10E along the Z direction. For example, the second tapered portion 16 is provided with a hinge portion 27 that straddles the central axis 3. The other configurations are the same as those of the first embodiment.

In the fifth embodiment, the groove 6 shown in FIG. 9B is assumed to be the measurement target of the gap gauge 10E. The groove 6 is formed by butting together a first base material 2 having an end 2a inclined with respect to the Z direction and a second base material 4 having an end 4a parallel to the Z direction.

When measuring the gap G of the groove 6, the first tapered portion 12 and the second tapered portion 16 are inserted into the groove 6 while being folded around the central axis 3. Specifically, the first tapered portion 12 is inserted until the pair of first oblique sides 12a, 12a abuts against the end 2a of the first base material 2. Similarly, the second tapered portion 16 is inserted until the pair of second oblique sides 16a, 16a abuts against the end 2a of the first base material 2.

At this time, a shift occurs between the first taper portion 12 and the second taper portion 16 in the Z direction. The first display portion 31 (see FIG. 1A) displays the amount of this shift. However, because the first taper portion 12 and the second taper portion 16 are folded, the value displayed by the first display portion 31 (i.e., the amount of shift) is twice the value of the gap G of the groove 6.

Sixth Embodiment
Next, a sixth embodiment of the present disclosure will be described.
Fig. 10 is a front view of the gap gauge 10F according to this embodiment. For the sake of convenience, the first display unit 31 is omitted from these figures. As shown in Fig. 10, the gap gauge 10F includes a first arm 41 that swingably supports the first taper portion 12, and a second arm 42 that swingably supports the second taper portion 16. However, the movement direction of the first taper portion 12 and the second taper portion 16 is limited to only the direction parallel to the Z direction by a slide mechanism 43 that slidably supports both of them.

The first arm 41 has a slot 45 extending in the longitudinal direction of the first arm 41. Similarly, the second arm 42 has a slot 46 extending in the longitudinal direction of the second arm 42. The shaft portion 47 passes through the slots 45 and 46 when the first arm 41 and the second arm 42 are overlapped in the Y direction. Therefore, the first arm 41 and the second arm 42 can swing around the shaft portion 47.

The shaft portion 47 is composed of, for example, a screw (not shown) and a nut (not shown). By tightly tightening the screw and nut that make up the shaft portion 47, the first arm 41 and the second arm 42 can be clamped together. In other words, by clamping the first arm 41 and the second arm 42 together, the first arm 41 and the second arm 42 can be maintained in a state inclined at a certain angle.

When measuring the gap G of the groove 6 using the gap gauge 10F, the shaft 47 is loosened in advance, and the first arm 41 and the second arm 42 are allowed to swing around the shaft 47. Then, the first tapered portion 12 and the second tapered portion 16 are moved in the Z direction and inserted into the groove 6.

When the first tapered portion 12 and the second tapered portion 16 come into contact with the groove 6, the shaft portion 47 is tightly tightened. This maintains the inclined state (intersecting state) of the first arm 41 and the second arm 42 when the first tapered portion 12 and the second tapered portion 16 come into contact with the groove 6, and as a result, the misalignment of the first tapered portion 12 and the second tapered portion 16 along the Z direction is maintained. With this misalignment maintained, the feeler gauge 10F is removed from the groove 6.

The first display section 31 (see FIG. 1A) displays the amount of misalignment between the first tapered section 12 and the second tapered section 16. Therefore, the gap G of the groove 6 can be immediately determined from this amount of misalignment.

According to this embodiment, the length of the first taper portion 12 and the second taper portion 16 along the Z direction can be made as short as possible. Therefore, even when measuring a groove 6 that opens in the Z direction (or the opposite direction) in a narrow space in the Z direction, the first taper portion 12 and the second taper portion 16 from the X direction can be brought close to the groove 6 to measure the gap G.

The present disclosure is not limited to the above-mentioned embodiment, but is shown by the claims, and further includes all modifications within the meaning and scope equivalent to the claims. For example, the gauges 10A to 10F may have a holding part (lock part) that holds the first state or the second state of the first gauge part 11 and the second gauge part 15. For example, the holding part may hold the first gauge part 11 and the second gauge part 15 by a structure that clamps them with a screw or the like. By providing such a holding part, for example, when measuring the gap G in a place where it is difficult to check the numerical value while looking into it, the measurer can use the holding part to hold the second state, and then move it to his/her hand and check the numerical value. This reduces the burden on the measurer and also prevents the first gauge part 11 and the second gauge part 15 from shifting when moving it to his/her hand, allowing for more accurate measurement. In this way, the above-mentioned embodiments can be appropriately combined as long as the original function of the gap gauge is not impaired.

2...first base material, 4...second base material, 6...groove, 10A to 10F, ...gauge, 11...first gauge portion, 12...first tapered portion, 12a...first oblique side (first inclined surface), 12b...tip, 13...support portion, 14...projection portion, 14a...tip portion, 15...second gauge portion, 15a...end portion, 16...second tapered portion, 16a...second oblique side (second inclined surface), 16b...tip, 17...groove portion, 18...stopper portion, 19... Third gauge portion, 20...third tapered portion, 21...base portion, 21a...contact surface, 22...first sub-base portion, 23...second sub-base portion, 24...first extension portion, 25...second extension portion, 26, 27...hinge portion, 28...leg portion, 31...first display portion, 32...second display portion, 33...third display portion, 41...first arm, 42...second arm, 43...slide mechanism, 45, 46...slot, 47...shaft portion, θ ₁ ...first vertex angle, θ ₂ ...second vertex angle

Claims (7)

a first gauge portion including a first tapered portion formed in a plate shape and having a pair of first oblique sides that form a tapered shape toward the insertion direction;
a second gauge portion including a second tapered portion formed in a plate shape having a pair of second oblique sides that form a tapered shape toward the insertion direction and overlapping with the first tapered portion so as to be slidable along the insertion direction;
a first indicator that indicates a relative deviation between the first tapered portion and the second tapered portion that occurs between a first state in which a position of a first apex angle of the first tapered portion formed by the pair of first oblique sides coincides with a position of a second apex angle of the second tapered portion formed by the pair of second oblique sides, and a second state in which a relative deviation occurs between the first tapered portion and the second tapered portion along the insertion direction,
The first apex angle and the second apex angle have an angular relationship that satisfies a condition that the deviation amount is equal to a distance between two intersection points where the pair of first oblique sides and the pair of second oblique sides intersect. a base portion including a contact surface facing the insertion direction and contacting a surface of a measurement target, the base portion supporting the first gauge portion slidably along the insertion direction;
2. The feeler gauge according to claim 1, further comprising a second display portion that displays a distance that a position of the apex of the first tapered portion has moved in the insertion direction with respect to a position on the contact surface. the base portion includes a first sub-base portion and a second sub-base portion that are located on one side and the other side of an arrangement of the first tapered portion and the second tapered portion and are provided so as to be slidable relative to each other along a direction parallel to the insertion direction,
The feeler gauge according to claim 2 , further comprising a third indicator that indicates an amount of deviation between the first sub-base portion and the second sub-base portion along the insertion direction. The feeler gauge according to any one of claims 1 to 3, wherein the first tapered portion and the second tapered portion have different thicknesses. a third gauge section including a third tapered section having the same shape as the first tapered section;
5. The feeler gauge according to claim 4, wherein the second tapered portion is located between the first tapered portion and the third tapered portion. the first gauge portion includes a first extension portion extending from the first tapered portion in a direction opposite to the insertion direction,
the second gauge portion includes a second extension portion extending from the second tapered portion in a direction opposite to the insertion direction,
The feeler gauge according to any one of claims 1 to 3, wherein the first extension portion or the second extension portion is provided with a scale as the first indication portion for indicating the amount of deviation between them along the insertion direction. The thickness gauge according to claim 1 , wherein the first tapered portion and the second tapered portion are configured to be foldable around a central axis of the thickness gauge along the insertion direction.

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