Pore size measuring jig

Abstract

To provide a pore size measuring jig that can measure the pore size of a pore including an enlarged-diameter part.SOLUTION: A pore size measuring jig 10 comprises: a guide member 20 with graduations M1 along a first direction; a first ruler 30 that is extended in a second direction orthogonal to the first direction and can be inserted into a pore; a first measuring pawl 32 that extends in the first direction from the leading end of the first ruler 30 and can be in contact with the pore wall of the pore; a slide member 40 that is slidably fixed to the guide member 20; a second ruler 50 that is extended in the second direction and can be inserted into the pore; and a second measuring pawl 52 that extends from the leading end of the second ruler 50 to the opposite side of the extension side of the first measuring pawl 32, and can be in contact with the pore wall. With the slide member 40 being arranged at the end of the guide member 20, the first ruler 30 is arranged on the front side of the second ruler 50 in a slide direction, the first measuring pawl 32 and the second measuring pawl 52 are arranged facing each other, and according to the slide of the slide member 40, the second ruler 50 and the first ruler 30 can pass each other.SELECTED DRAWING: Figure 3A

Description

Technical Field

[0001] The present invention relates to a pore size measuring jig.

Background Art

[0002] The following Patent Document 1 shows an inside diameter measuring caliper. In this inside diameter measuring caliper, the first jaw and the second jaw are inserted into a hole, and the measuring surfaces formed at the tips of the respective jaws abut against the measured position on the inner peripheral wall surface of the hole, so that the inside diameter can be measured.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the inside diameter measuring caliper shown in the above Patent Document 1, the measuring surfaces of the first jaw and the second jaw are convex hemispherical surfaces. As a result, this inside diameter measuring caliper can be used even when a step is formed on the inner peripheral wall surface of the hole to be measured. However, it can only handle steps that fall within the range of the protrusion width of the hemispherical measuring surface. For this reason, for example, it is difficult to measure the pore size of a relatively large diameter-expanded portion with respect to the pore size.

[0005] In consideration of the above facts, an object of the present invention is to provide a pore size measuring jig that can measure the pore size of a hole including a diameter-expanded portion.

Means for Solving the Problems

[0006] The aperture measuring jig according to claim 1 includes a graduated guide member along a first direction, a first gauge fixed to the guide member and extending in a second direction orthogonal to the first direction and insertable into a hole, a first measuring claw extending from a tip of the first gauge in the first direction and capable of contacting a hole wall of the hole, a slide member slidably fixed to the guide member, a second gauge fixed to the slide member and extending in the second direction and insertable into the hole, and a second measuring claw extending from a tip of the second gauge to a side opposite to an extending side of the first measuring claw and capable of contacting the hole wall. In a state where the slide member is disposed at an end of the guide member, the first gauge is disposed on a front side in a slide direction with respect to the second gauge, the first measuring claw and the second measuring claw are disposed facing each other, and the second gauge and the first gauge can rub against each other according to the slide of the slide member.

[0007] In the aperture measuring jig according to claim 1, the graduated guide member can be disposed at an orifice of the hole, and the first gauge and the second gauge can be inserted into the hole. Then, by bringing the first measuring claw and the second measuring claw into contact with the hole wall, the aperture diameter can be read. At this time, the aperture diameter, that is, the distance between tips of the first measuring claw and the second measuring claw, can be read from the graduation of the guide member.

[0008] Further, the first gauge and the second gauge are further inserted into the hole, and the slide member is slid along the guide member in a state where depth positions of the first measuring claw and the second measuring claw reach a designed position of an enlarged diameter portion of the hole.

[0009] Thereby, the first measuring claw and the second measuring claw move and contact the hole wall of the enlarged diameter portion. By reading the distance between tips of the first measuring claw and the second measuring claw at this time with the graduation of the guide member, the aperture diameter of the enlarged diameter portion can be read.

[0010] Furthermore, in this aperture measuring jig, since the second gauge and the first gauge can rub against each other according to the slide of the slide member, a wide range of aperture diameters can be read from a state where the slide member is disposed at an end of the guide member to a state after rubbing against each other.

[0011] Accordingly, in this aspect, compared with a configuration in which the second ruler and the first ruler cannot rub against each other, the hole diameters of the widened diameter portions in a wide range can be read. Further, in this aspect, since the movable part is not disposed in the hole and the slide member is moved outside the hole, even if there is dust in the hole, the occurrence of malfunction is less and it is easy to measure the hole diameter.

[0012] The hole diameter measuring jig according to claim 2 is the hole diameter measuring jig according to claim 1, wherein the guide member is formed with a first holding portion for slidably holding the first ruler in the second direction, and the slide member is formed with a second holding portion for slidably holding the second ruler in the second direction, and at least one of the first ruler and the second ruler is provided with a scale along the second direction.

[0013] According to the hole diameter measuring jig of claim 2, the depth of the hole at the portion where the hole diameter is measured can be read from the scale of the first ruler or the second ruler. Thereby, the hole depth and the hole diameter can be measured in association with each other. Further, the hole diameter can be measured with the guide member fixed to the hole opening of the hole.

[0014] The hole diameter measuring jig according to claim 3 is the hole diameter measuring jig according to claim 1 or 2, wherein the tips of the first measuring claw and the second measuring claw are sharp portions that come into contact with the hole wall at a single point.

[0015] According to the hole diameter measuring jig of claim 3, the measurement accuracy of the hole diameter is improved as compared with the case where the tip is formed flat and comes into contact with the hole wall having a circular cross-sectional shape at two points.

Advantages of the Invention

[0016] According to the present invention, the hole diameter of a hole including a widened diameter portion can be measured.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2A

Figure 2B

Figure 3A

Figure 3B

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0018] Hereinafter, the aperture measurement jig according to the embodiment of the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of them may exist.

[0019] In addition, the description of overlapping configurations and reference numerals in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and appropriate modifications can be made, such as omitting configurations, replacing them with different configurations, and combining one embodiment and various modifications within the scope of the object of the present disclosure.

[0020] In each drawing, the directions indicated by arrows X and Y are, for example, directions along the horizontal plane and are perpendicular to each other. The direction indicated by arrow Z is a direction along the vertical direction (up and down direction). In each figure, the directions indicated by arrows X, Y, and Z are assumed to coincide with each other.

[0021] <Aperture Measurement Jig> The aperture measurement jig 10 according to the embodiment of the present invention is a jig for measuring the aperture of a hole 90 having an enlarged diameter portion 92, as shown in FIG. 1. The hole 90 is a vertical hole drilled in the vertical direction, but the drilling direction of the hole whose aperture is measured by the aperture measurement jig 10 is not particularly limited.

[0022] As shown in FIG. 3A, the aperture measurement jig 10 includes a guide member 20, a first gauge 30, a first measurement claw 32, a slide member 40, a second gauge 50, and a second measurement claw 52. The guide member 20 and the slide member 40 can be formed using off-the-shelf products.

[0023] Among these members, as shown in FIG. 2A, a first scale 30 is fixed to the guide member 20, and as shown in FIG. 2B, a second scale 50 is fixed to the slide member 40. Then, by fitting the slide member 40 to the guide member 20, the hole diameter measuring jig 10 shown in FIGS. 3A and 3B is formed.

[0024] (Guide member) The guide member 20 is a member with a scale (main scale) M1 along the first direction (X direction in FIG. 3A). The guide member 20 is a long member having the first direction as its longitudinal direction.

[0025] (First scale and first measuring claw) The first scale 30 is a member fixed to the guide member 20 and includes a base end portion 30A and a shaft portion 30B.

[0026] The base end portion 30A is fixed to the front side of the guide member 20 (front side in the Y direction in FIG. 3A) via a plurality of legs 34. The legs 34 hold the first scale 30 at a position spaced apart from the guide member 20 in the Y direction as shown in FIG. 3B.

[0027] Also, as shown in FIG. 3A, a scale M2 along the X direction is provided on the base end portion 30A. The scale M2 is a scale engraved at the same position as the scale M1 in the X direction.

[0028] In the embodiment shown in this figure, although the scale M1 is partially covered by the base end portion 30A and not visible, for example, if it is formed at the position indicated by the two-dot chain line E at the upper end portion of the base end portion 30A, the scale M1 can be visually recognized. In such a case, the scale M2 can also be omitted.

[0029] The shaft portion 30B is a long member extending in a second direction (Z direction in FIG. 3A) orthogonal to the first direction and can be inserted into the hole 90 (see FIG. 1). A first measuring claw 32 is formed at the tip of the shaft portion 30B. The first measuring claw 32 extends from the tip of the shaft portion 30B in the X direction and is capable of contacting the hole wall 90A (see FIG. 1) of the hole 90.

[0030] As shown in FIG. 3B, the shaft portion 30B is thicker (dimension in the Y direction) than the base end portion 30A. Specifically, the shaft portion 30B is formed such that its thickness increases toward the back side of the guide member 20 with respect to the base end portion 30A.

[0031] (Slide member) The slide member 40 is a member slidably fixed to the guide member 20. The slide member 40 is disposed so as to surround the guide member 20 and has an opening V on the front side in the Y direction.

[0032] As shown in FIG. 3A, when the slide member 40 slides on the guide member 20 in the direction indicated by, for example, arrow N1, the leg 34 of the first gauge 30 is disposed in the opening V of the slide member 40, thereby suppressing interference between the slide member 40 and the first gauge 30.

[0033] Further, a scale (sub-scale) M3 along the X direction is provided on the slide member 40. Using this scale M3 and the above-described scale M1 or M2, the distance along the X direction (for example, dimension W1 in FIG. 3A) between the tip of the first measuring claw 32 and the tip of the second measuring claw 52 can be measured.

[0034] (Second gauge and second measuring claw) The second gauge 50 is a member fixed to the slide member 40 and includes a base end portion 50A and a shaft portion 50B.

[0035] The base end portion 50A is fixed in contact with the back side of the slide member 40 as shown in FIG. 3B.

[0036] The shaft portion 50B is a long member extending in the Z direction and in the same direction as the shaft portion 30B of the first gauge 30 and is insertable into the hole 90 (see FIG. 1). A second measuring claw 52 is formed at the tip of the shaft portion 50B. The second measuring claw 52 extends from the tip portion of the shaft portion 50B in the X direction and on the side opposite to the extending side of the first measuring claw 32 and is capable of contacting the hole wall 90A (see FIG. 1) of the hole 90.

[0037] As shown in FIG. 3B, the shaft portion 50B is thicker (Y-direction dimension) than the base end portion 50A. Specifically, the shaft portion 50B is formed such that its thickness increases toward the front side of the guide member 20 with respect to the base end portion 50A.

[0038] (Positional relationship between the first reference gauge and the second reference gauge) As shown in FIG. 3A, with the slide member 40 disposed at the end of the guide member 20, the shaft portion 30B of the first reference gauge 30 is disposed on the front side in the slide direction with respect to the shaft portion 50B of the second reference gauge 50.

[0039] Also, the first measuring claw 32 and the second measuring claw 52 have the same length (dimension W1) and are arranged facing each other. In a state where the slide member 40 is disposed at the end of the guide member 20, the first measuring claw 32 and the second measuring claw 52 are arranged overlapping each other, and the distance between the tips of the first measuring claw 32 and the second measuring claw 52 is dimension W1.

[0040] As shown in FIG. 4, in response to the sliding of the slide member 40, the second reference gauge 50 moves closer to the first reference gauge 30, and the tips of the first measuring claw 32 and the second measuring claw 52 are separated from each other and the dimension expands (dimension W2).

[0041] Also, as shown in FIG. 5, the second reference gauge 50 and the first reference gauge 30 are configured to be able to slide past each other in response to the sliding of the slide member 40. At this time, the tips of the first measuring claw 32 and the second measuring claw 52 are further separated from each other and the dimension expands (dimension W3).

[0042] Note that these dimensions are such that dimension W1 < W2 < W3, and dimension W1 is set to be equal to or less than the hole diameter (minimum diameter) H1 of the hole 90 to be measured shown in FIG. 1(A).

[0043] Further, as shown in FIG. 1(C), after the second reference 50 and the first reference 30 rub against each other, the width W4 between the outer sides of the shaft portion 30B of the first reference 30 and the shaft portion 50B of the second reference 50 is within a range equal to or less than the hole diameter (minimum diameter) H1 of the hole 90, and the tips of the first measuring claw 32 and the second measuring claw 52 can be separated from each other.

[0044] Therefore, the distance W3max shown in FIG. 1(D) becomes the maximum diameter of the enlarged diameter portion 92 that can be measured by the hole diameter measuring jig 10. The distance W3max is the distance between the tips of the first measuring claw 32 and the second measuring claw 52 when the width W4 between the outer sides of the shaft portion 30B of the first reference 30 and the shaft portion 50B of the second reference 50 coincides with the hole diameter (minimum diameter) H1 of the hole 90.

[0045] <Function and Effect> In the hole diameter measuring jig 10 according to the above embodiment, as shown in FIG. 3A, the guide member 20 with the scale M1 can be arranged at the hole opening of the hole 90 shown in FIG. 1(A), and the first reference 30 and the second reference 50 can be inserted into the hole 90.

[0046] Then, as shown in FIG. 2B, by bringing the first measuring claw 32 and the second measuring claw 52 into contact with the hole wall 90A, the hole diameter H1 can be read. At this time, the hole diameter, that is, the dimension W2 between the tips of the first measuring claw 32 and the second measuring claw 52 can be read from the scale M1 of the guide member 20 (or the scale M2 of the first reference 30).

[0047] Also, as shown in FIG. 1(C), the first reference 30 and the second reference 50 are further inserted into the hole 90, and with the depth positions of the first measuring claw 32 and the second measuring claw 52 reaching the design positions of the enlarged diameter portion 92 of the hole 90, the slide member 40 is slid along the guide member 20.

[0048] Thereby, the first measuring claw 32 and the second measuring claw 52 move and come into contact with the hole wall of the enlarged diameter portion 92. By reading the distance (dimension W3) between the tips of the first measuring claw 32 and the second measuring claw 52 at this time with the scale M1 of the guide member 20 (or the scale M2 of the first reference 30), the hole diameter H2 of the enlarged diameter portion 92 can be read.

[0049] Furthermore, in this pore diameter measuring jig 10, since the second gauge 50 and the first gauge 30 can rub against each other according to the sliding of the slide member 40, a wide range of pore diameters can be read from the state where the slide member 40 is disposed at the end of the guide member 20 to the state after rubbing against each other.

[0050] Thereby, in this aspect, compared with a configuration in which the second gauge and the first gauge cannot rub against each other, a wide range of pore diameters including the enlarged diameter portion can be read. Also, in this aspect, since the movable part is not disposed inside the hole 90 and the slide member 40 is moved outside the hole 90, even if there is dust inside the hole 90, the occurrence of malfunction is small and it is easy to measure the pore diameter.

[0051] <Expansion Example> In the above embodiment, it is assumed that the first gauge 30 is fixed to the guide member 20 and the second gauge 50 is fixed to the slide member 40, but the embodiments of the present invention are not limited to this.

[0052] For example, like the first gauge 60 shown in FIGS. 6 and 7, the first gauge of the present invention may be formed so as to be slidable in the Z direction (the depth direction of the hole) with respect to the guide member 20. In this case, the guide member 20 is formed with a first holding portion 22 capable of holding the first gauge 60. The first gauge 60 is formed with a uniform thickness in the Z direction, and a first measurement claw 62 is formed at the tip.

[0053] Similarly, for example, like the second gauge 70 shown in FIGS. 6 and 7, the second gauge of the present invention may be formed so as to be slidable in the Z direction with respect to the slide member 40. In this case, the slide member 40 is formed with a second holding portion 42 capable of holding the second gauge 70. The second gauge 70 is formed with a uniform thickness in the Z direction, and a second measurement claw 72 is formed at the tip.

[0054] In such an aspect, it is preferable to form a scale M4 along the Z direction on at least one of the first reference 60 and the second reference 70. Thereby, the depth of the hole 90 at the portion where the hole diameter is measured can be read from the scale M4. For this reason, the depth and the hole diameter of the hole 90 can be measured in association with each other. Further, the hole diameter can be measured with the guide member 20 fixed to the hole opening of the hole. Note that the scale M4 may be formed on the first reference 30 and the second reference 50 described above.

[0055] Further, in the above embodiment, as shown in FIGS. 8(A) and 8(B), the tip of the first measuring claw 32 has a rectangular shape. For this reason, the tip of the first measuring claw 32 contacts the hole wall 90A at two points.

[0056] In the present invention, for example, as shown in FIGS. 9(A) and 9(B), a sharp portion 32A that contacts the hole wall 90A at one point may be formed at the tip of the first measuring claw 32. The sharp portion 32A has, for example, a semi-circular shape in plan view. The sharp portion 32A may be formed integrally with the first measuring claw 32 or may be attached later as an attachment.

[0057] Similarly, for example, as shown in FIGS. 10(A) and 10(B), a sharp portion 32B that contacts the hole wall 90A at one point may be formed at the tip of the first measuring claw 32. The sharp portion 32A has, for example, a tapered shape in which the width of the first measuring claw 32 gradually decreases in plan view. The sharp portion 32B may be formed integrally with the first measuring claw 32 or may be attached later as an attachment.

[0058] By forming the sharp portions 32A and 32B that contact the hole wall 90A at one point in this way, the measurement accuracy of the hole diameter can be improved as compared with the case where they are not formed. A configuration similar to that of the sharp portions 32A and 32B can be applied to the second measuring claw 52.

Explanation of Reference Numerals

[0059] 10 Hole diameter measuring jig 20 Guide member 22 First holding portion 30 First reference 32 First measuring claw 32A Sharp part 32B Sharp part 40 Slide member 42 Second holding part 50 Second gauge 52 Second measuring claw 60 First gauge 62 First measuring claw 70 Second gauge 72 Second measuring claw 90 Hole 90A Hole wall

Claims

1. A graduated guide member along a first direction, a first gauge fixed to the guide member and extending in a second direction orthogonal to the first direction and insertable into a hole, a first measuring claw extending from a tip of the first gauge in the first direction and capable of contacting a hole wall of the hole, a slide member slidably fixed to the guide member, a second gauge fixed to the slide member and extending in the second direction and insertable into the hole, a second measuring claw extending from a tip of the second gauge to a side opposite to an extending side of the first measuring claw and capable of contacting the hole wall, comprising: in a state where the slide member is disposed at an end of the guide member, the first gauge is disposed on a front side in the sliding direction from the second gauge, the first measuring claw and the second measuring claw are disposed facing each other, a hole diameter measuring jig capable of rubbing against each other between the second gauge and the first gauge according to sliding of the slide member.

2. a first holding portion for slidably holding the first gauge in the second direction is formed on the guide member, a second holding portion for slidably holding the second gauge in the second direction is formed on the slide member, at least one of the first gauge and the second gauge is provided with graduations along the second direction, the hole diameter measuring jig according to Claim 1.

3. tips of the first measuring claw and the second measuring claw are sharp portions that contact the hole wall at a single point, the hole diameter measuring jig according to Claim 1 or 2.

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