JP3206123U - Hole position measuring jig - Google Patents

Abstract

An object of the present invention is to accurately measure the position of a hole provided on an inclined surface at any angle with a single hole position measuring jig. A male screw portion 2 that engages with a female screw of a hole provided on an inclined surface of an object, and a self screw for measuring the position of the hole in a state where the male screw portion 2 is screwed to the female screw portion. In the hole position measuring jig 1 provided with the measurement surface provided on the surface, the measurement surface is a true spherical surface (the true spherical surface of the true sphere 6). Regardless of the value of the angle of the inclined surface, it is possible to make a point contact with the spherical surface of the height gauge scriber and calculate the position of the point contact on the spherical surface in advance. The position of the hole can be calculated based on the position of the jig, the dimensions of each part of the jig, and the gauge reading of the height gauge. [Selection] Figure 7

Description

  The present invention relates to a hole position measuring jig used when measuring the position of a hole such as a screw hole provided on an inclined surface of a measurement object.

  Conventionally, an engagement portion that engages with a hole provided on an inclined surface of an object, and a measurement surface provided on itself to measure the position of the hole with the engagement portion engaged with the hole There are known hole position measuring jigs.

  For example, an oblique hole position measuring gauge as a hole position measuring jig as shown in FIG. 11 is conventionally known. As shown in the figure, this oblique hole position measuring gauge has a male screw portion as an engaging portion that is screwed into a tap hole provided on an inclined surface, and the tap hole in a state where the male screw portion is screwed into the tap hole. And a measuring surface provided for measuring the position in the horizontal direction.

  When measuring the position of the tapped hole provided on the inclined surface of the object to be measured using such an oblique hole position measuring gauge and a height gauge as a position measuring machine widely available in the general market, Will do the work. That is, if the height gauge can be used while being laid down in the horizontal direction, the height gauge is placed on the workbench in a horizontal position. Then, the male thread portion of the oblique hole position measurement gauge is screwed into the tap hole of the object to be examined. Next, the test object is set on the work table in a state where the reference position of the test object is aligned with the reference position of the work table. Then, the scriber of the height gauge is slid in the horizontal direction, and the measurement surface of the scriber is brought into contact with the measurement surface of the oblique hole position measurement gauge attached to the object to be examined. The value obtained by reading the height gauge in this state is the distance from the reference position on the measurement surface of the oblique hole position measurement gauge. When the measurement surface of the oblique hole position measurement gauge is closer to the reference position than the center of the tap hole, a value obtained by adding a predetermined value to the distance is calculated as the reference position at the center of the tap hole. It can be calculated as a distance from. Further, when the center of the tap hole exists closer to the measurement surface of the oblique hole position measurement gauge, a value obtained by subtracting the predetermined value from the distance is obtained as a distance from the reference position of the center of the tap hole. be able to.

  However, when measuring the distance, the measurement surface of the scriber extending in the vertical direction of the height gauge placed on the work table is perfectly fitted to the measurement surface of the oblique hole position measurement gauge set on the work table. If it is not in close contact, the distance cannot be measured accurately. And in order to make it closely adhere, the measurement surface of the oblique hole position measurement gauge must also extend in the vertical direction, but for this purpose, the inclined surface needs to be inclined at a specific angle. . If the inclined surface is inclined at an angle different from the specific angle, the measurement surface of the inclined hole position measurement gauge screwed into the tap hole also extends in a direction different from the vertical direction. Only the inclined surface of a specific angle can be dealt with. In other words, in order to deal with inclined surfaces of various angles, a dedicated oblique hole position measurement gauge for each angle must be prepared, which raises a problem of increasing costs.

  In order to solve the above-described problems, the present invention relates to an engagement portion that engages with a hole provided on an inclined surface of an object, and the position of the hole in a state where the engagement portion is engaged with the hole. In a hole position measuring jig provided with a measuring surface provided on itself for measurement, the measuring surface is a true spherical surface.

  According to the present invention, there is an excellent effect that the position of the hole can be accurately measured by one hole position measuring jig, regardless of the angle of the hole provided on the inclined surface. .

The perspective view which shows a block. The cross-sectional view of the block. The front view which shows the diagonal hole position measurement gauge for exclusive use for measuring the height z of a tap hole. FIG. 4 is a cross-sectional view showing a block in a state where the oblique hole position measurement gauge of FIG. 3 is set. The front view which shows the diagonal hole position measurement gauge for exclusive use for measuring the distance x of a tap hole. The cross-sectional view which shows the block which changed the attitude | position, and the same oblique hole position measurement gauge set to this. The front view which shows the jig | tool for hole position measurement which concerns on embodiment. The front view which shows the jig | tool for the same hole position measurement of the state which removed the true spherical body. The cross-sectional view which shows the same block in which the jig | tool for the same hole position measurement was set. FIG. 10 is a cross-sectional view showing the same block and the same hole position measuring jig in a state rotated by 90 ° in the counterclockwise direction in the drawing from the state of FIG. The figure which shows the conventional diagonal hole position measurement gauge.

Hereinafter, an embodiment of a hole position measuring jig to which the present invention is applied will be described.
FIG. 1 is a perspective view showing a block 100 as a test object. The block 100 has an inclined surface 101 and a tap hole 102 provided in the inclined surface 101. The tap hole 102 has a female thread cut by a tap on the inner peripheral surface of a hole excavated by drilling. A one-dot chain line in the figure indicates the central axis of the tap hole 102.

FIG. 2 is a cross-sectional view of the block 100. As shown in the figure, the inclined surface 101 of the block 100 is inclined at an angle of 30 ° from the bottom surface 103 of the block 100.
Hereinafter, an example in which the height z from the bottom surface 103 of the entrance center in the tap hole 102 of the block 100 and the distance x from the center in the lateral direction will be described.

  First, an example in which the height z and the distance x are measured using a conventional oblique hole position measurement gauge will be described. FIG. 3 is a front view showing a dedicated oblique hole position measurement gauge 200 for measuring the height z. The oblique hole position measurement gauge 200 includes a male screw portion 201 that is screwed into the tap hole 102 of the block 100, a main body portion 202 on which a measurement surface 202a is formed, and a grip portion 203 that is gripped by an operator. Yes. The measurement surface 202a is inclined at an angle of 30 [°] with respect to a seating surface 202b, which is a surface where the main body 202 closely contacts the inclined surface 101 of the block 100 when the male screw portion 201 is screwed into the tap hole 102. doing.

  FIG. 4 is a cross-sectional view showing the block 100 in a state where the oblique hole position measurement gauge 200 of FIG. 3 is set. In the same figure, the oblique hole position measuring gauge 200 has its male threaded portion 201 screwed into the tap hole 102 of the block 100 until the seating surface 202b of the main body portion 202 is brought into close contact with the inclined surface of the block 100. I'm hurt. In this state, the measurement surface of the oblique hole position measurement gauge 200 assumes a posture extending in the horizontal direction as illustrated.

Before the block 100 shown in FIG. 4 is set on the work table, the height gauge is installed on the work table in a posture in which the height gauge stands in the vertical direction. In this state, the measuring surface of the height gauge scriber extends in the horizontal direction. The operator slides the scriber downward to a position where the measurement surface of the height gauge scriber installed on the workbench is in close contact with the workbench surface. In this state, the height gauge is zeroed. Thereafter, the scriber is slid upward to separate the measurement surface from the surface of the workbench, and then the block 100 is placed in a posture in which the bottom surface 103 of the block 100 shown in FIG. Set on top. Then, the height gauge scriber is slid downward to bring the measuring surface of the scriber into close contact with the measuring surface 202 a extending in the horizontal direction of the oblique hole position measuring gauge 200. It reads the value of the gauge height gauge in this state, obtaining a reading z _0. The height z can be obtained by subtracting the known theoretical difference value z ₁ peculiar to the illustrated oblique hole position measurement gauge 200 from the read value z ₀ .

  As shown in the drawing, in the block 100 in which the first side surface 104 rises at an angle of 90 ° from the bottom surface 103 and extends in the vertical direction, the tap hole 201 can be formed without laying the height gauge sideways. It is possible to measure the horizontal position of the entrance center. Specifically, the block 100 may be reset to a posture rotated 90 [deg.] In the counterclockwise direction in the figure, and the same procedure as the measurement of the height z may be performed. However, since the angle of the slope changes from 30 [°] to 60 [°] when rotated by 90 [°], it is necessary to replace the oblique hole position measurement gauge 200 with one corresponding to 60 [°]. .

  FIG. 5 is a front view showing a dedicated oblique hole position measurement gauge 205 for measuring the distance x. The slant hole position measurement gauge 205 has the same configuration as that of the slant hole position measurement gauge 200 of FIG. 3 except that the measurement surface is 60 [°]. The operator changed the gauge set on the block 100 from the one shown in FIG. 3 to the one shown in FIG. 5, and then rotated the block 100 from the state shown in FIG. 4 by 90 [°] in the counterclockwise direction in the figure. Change to posture.

FIG. 6 is a cross-sectional view showing the block 100 whose posture has been changed and the oblique hole position measurement gauge 205 set therein. In the figure, the measurement surface of the oblique hole position measurement gauge 205 extends in the horizontal direction. In this state, by operating the height gauge as in the case of measuring the height z, to obtain readings x _0. This reading x0, the theoretical difference x ₁ specific obliquely hole position measuring gauge 205 shown, by subtracting a half of the length of the bottom surface 103, it is possible to determine the distance x.

  As described above, the height z and the distance x can be measured even in the conventional oblique hole position measurement gauge. However, when the angle of the inclined surface 101 is different from 45 [°], the angle of the inclined surface 101 is different between when measuring the height z and when measuring the distance x. It is necessary to prepare two hole position measurement gauges corresponding to each angle.

Next, the hole position measuring jig according to the embodiment will be described.
FIG. 7 is a front view showing the hole position measuring jig 1 according to the embodiment. The hole position measuring jig 1 made of a metal material such as stainless steel has a male screw portion 2 for screwing into the tap hole 102 of the block 100, a main body portion 5, and a true measurement surface comprising a spherical surface. And a sphere 6.

  The main body 5 includes a grip 3 that is gripped by an operator and a sphere holder 4 that holds a true sphere 6. The grip 3 is provided with a plurality of concave holes 3 a arranged in the circumferential direction. ing. When the engaging portion is the male screw portion 2 screwed to the female screw portion as in the hole position measuring jig according to the embodiment, the operator's hand holding the grip portion 3, the grip portion 3, By increasing the frictional resistance by the edges of the plurality of recessed holes 3a, the operator can easily perform the jig rotation operation.

  FIG. 8 is a front view showing the hole position measuring jig 1 with the true sphere 6 removed. As shown in the figure, the spherical body holding portion 4 includes a conical concave portion 4a that receives a part of the true sphere 6 and is in close contact with the part. A part of the true spherical surface of the true sphere 6 is bonded to the conical recess 4 a by the adhesive, so that the true sphere 6 is fixed to the sphere holding portion 4. It is easier to process the true sphere 6 having all of the true sphere than to process the partial sphere having only a part of the true sphere. By providing the spherical body holding portion 4 with a concave portion 4a as shown in the drawing, it is possible to easily manufacture a hole position measuring jig having a measurement surface composed of a partial spherical surface using a true spherical body 6 that can be easily processed.

  Note that it is not essential to provide the entire spherical surface as a spherical surface. For example, in the hole position measuring jig according to the embodiment, the region of the entire spherical body 6 that has entered the conical recess 4a does not function as a measurement surface that is abutted against the scriber, and is not in the recess 4a. Only the non-intruded area (part of the true spherical surface) functions as a measurement surface. In this way, only a part of the spherical surface may be provided as the measurement surface.

FIG. 9 is a cross-sectional view showing the block 100 in which the hole position measuring jig 1 according to the embodiment is set. In the hole position measuring jig 1, the male screw portion 2 is screwed into the tap hole 102 until the seat surface 202 b of the main body portion 5 is brought into close contact with the inclined surface 101 of the block 100. In this state, when the scriber of the height gauge is pushed down, point contact is made with a location where the measurement surface of the scriber is located at the uppermost position in the true sphere 6 of the position measuring jig 1 (hereinafter referred to as the highest location). To do. The uppermost portion changes according to the angle of the inclined surface 101 (30 ° in the illustrated example), but the uppermost portion can be specified in advance by a trigonometric function based on the angle of the inclined surface 101. The theoretical difference z ₁ can also be calculated in advance based on the angle of the inclined surface 101 (30 ° in the illustrated example). Then, the height z can be obtained by subtracting the theoretical difference z ₁ from the read value z ₀ .

The theoretical difference z ₁ can be obtained by the equation “z ₁ = cos θ (sphere height h−sphere radius) + sphere radius”. In this equation, the sphere height h is a distance from the seating surface 202 b to the apex of the true sphere 6 in the rotation axis direction of the hole position measurement gauge 200. The sphere radius is the radius of the true sphere 6. In addition, when the height z is known in advance instead of the angle θ, “cos θ (sphere height h−sphere radius) = read value Z ₀ −height Z−sphere radius” It is also possible to obtain the angle θ.

FIG. 10 is a cross-sectional view showing the block 100 and the hole position measuring jig 1 in a state rotated 90 [deg.] Counterclockwise from the state of FIG. By rotating the posture, the angle of the inclined surface 101 is changed from 30 [°] to 60 [°], but the hole position measuring jig 1 is the same as that shown in FIG. The uppermost portion of the true sphere 6 in this state can be specified in advance based on the angle of the inclined surface 101 (= 60 °). Further, it is possible to make calculated in advance based on also the angle theoretical difference x ₁ (= 60 °). Then, the distance x can be obtained by subtracting the theoretical difference x ₁ and half the length of the bottom surface 103 from the reading x ₀ .

Since the posture of the block 100 is changed so that the x direction follows the height z direction, the method for calculating the distance x is exactly the same as the method for calculating the height z. Specifically, when the distance x is replaced with the height z, the theoretical difference x1 is replaced with the theoretical difference z1, and the angle θ is replaced with 60 [°], the same method as the method of calculating the height z is used. Good. In this case, when the distance x is known in advance instead of the angle θ, “cos θ (sphere height h−sphere radius) = read value Z ₀ −height Z−sphere radius” It is also possible to obtain the angle θ. The read value Z ₀ in this equation is actually the read value X ₀ and the height Zz is actually the distance x.

  As described above, in the hole position measuring jig 1 according to the embodiment, the position of the hole can be changed by one hole position measuring jig 1 regardless of the angle of the hole provided on the inclined surface. Can be measured.

What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
[Aspect A]
Aspect A includes an engaging portion (for example, male screw portion 2) that engages with a hole (for example, tap hole 102) provided in an inclined surface (for example, inclined surface 101) of an object (for example, block 100), and the engaging portion. A hole position measuring jig (for example, hole position measurement) provided with a measurement surface (for example, the true spherical surface of the true sphere 6) provided to measure the position of the hole in a state where the hole is engaged with the hole. In the jig 1), the measurement surface is a spherical surface.

  In the aspect A, whatever the angle of the inclined surface of the object is, it is farthest from the inclined surface in the measuring surface made of a spherical surface of the position measuring jig set in the hole provided in the inclined surface. The point at the raised position is abutted against the measurement surface of the height gauge scriber. The location changes according to the angle of the inclined surface, but can be obtained in advance by a trigonometric function based on the angle. In addition, as described above, in order to convert the reading value of the height gauge in a state where the measurement surface of the scriber is in contact with the distance from the reference position (measurement value of the position), the value to be added / subtracted with respect to the reading time is also used. It is possible to obtain in advance based on the aforementioned angle. Therefore, even if it is a hole provided in the inclined surface of what angle, the position of the hole can be accurately measured with one hole position measuring jig.

[Aspect B]
Aspect B is characterized in that, in Aspect A, the jig main body (main body portion 5) is provided with a recess that receives a part of the true sphere having the measurement surface and is in close contact with the part. With this configuration, it is possible to easily manufacture a hole position measuring jig having a measurement surface composed of a partial spherical surface using a true sphere that is easy to process.

[Aspect C]
Aspect C is the aspect B, in which the diameter of the jig main body located between the engaging portion and the true sphere is the largest of all the jigs and is arranged in the circumferential direction on the jig main body. This is characterized in that a concave hole is provided. In such a configuration, when the engaging portion is a screw portion, by increasing the frictional resistance between the operator's hand holding the jig body and the jig body by the edges of a plurality of recessed holes, The operator can easily perform the jig rotation operation.

1: Hole position measuring jig 2: Male screw part (engagement part)
3: Grasping part 3a: Concave hole 4: Sphere holding part 4a: Concave part 5: Main part (jig main part)
6: True sphere 100: Block (object)
101: inclined surface 102: tapped hole (hole)
103: Bottom surface 104: First side surface

Claims (3)

An engaging portion that engages with a hole provided on an inclined surface of an object, and a measurement surface provided on itself for measuring the position of the hole in a state where the engaging portion is engaged with the hole. In the hole position measuring jig provided,
A hole position measuring jig, wherein the measuring surface is a spherical surface. In the hole position measuring jig according to claim 1,
A jig for assuming a hole position, wherein a jig body is provided with a recess that receives a part of a true sphere having the measurement surface and is in close contact with the part. In the hole position measuring jig according to claim 2,
The diameter of the jig body located between the engaging portion and the true sphere is the largest diameter in the entire jig, and a plurality of concave holes arranged in the circumferential direction are provided in the jig body. Characteristic jig for measuring hole position.

Images