JPH0653912U - measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] The positional relationship between the hole surface of the tapered hole and the spindle end surface is
To provide a measuring device capable of easily and accurately measuring with a device having a simple structure. [Structure] A flange 17 protruding from one end of the tubular body 16.
Is provided with an end face probe 18 that comes into contact with the reference end face 14 of the spindle master gauge 11, and the linear actuation body 28 is provided in the tubular body 16.
And a spring 33 for urging the linear actuating body 28 toward the one end side in the axial direction. The support member 19 is provided with a movable probe 20 whose outer end is in contact with the inner surface of the tapered hole 13 so as to be movable within a certain range, and is provided with a support 21 which is in contact with the inner surface of the tapered hole 13, A conversion member 30 is provided between the inner end and one end of the linear actuation body 28 to detect the displacement amount of the movable probe 20.
5 is provided on the other end side of the tubular body 16 in association with the linear actuation body 28.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a measuring device for measuring a positional relationship between an inner surface of a tapered hole of a spindle and an end surface of the spindle when precision machining a spindle with a tapered hole of a machine tool.

[0002]

[Prior art]

 A tool holder for holding various tools is attached to the spindle. That is, as shown in FIG. 5 and the like, it is attached by fitting the taper shank portion 4 of the tool holder 3 into the taper hole 2 provided in the main shaft 1. When fitting the taper shank portion 4 into the taper hole 2, the maximum diameter D, the length L, etc. of the taper hole 2 and the taper shank portion 4 are standardized according to JIS or ISO standard, and to some extent. It is standardized that a predetermined facing gap Y is provided between the reference end surface 1a of the spindle 1 and the flange end surface 5a of the tool holder 3 in consideration of the manufacturing error (Δi).

According to the taper hole 2 and the taper shank portion 4 manufactured in accordance with this standard, as shown by the phantom line in FIG. 5, the reference end surface 1a of the main shaft 1 is slightly bent due to the manufacturing error (Δi) to the flange end surface 5a. Even if the flange end surface 5a is slightly projected toward the reference end surface 1a due to the manufacturing error (Δi), the manufacturing error (Δi) is absorbed by the facing gap Y, and Since the flange end surface 3a does not come into contact with each other, the tapered shank portion 4 can be surely fitted into the tapered hole 2 in a close contact manner. On the other hand, however, since the reference end surface 1a and the flange end surface 5a are separated from each other, the cutting load is concentrated on the taper shank portion 4 and the contact surface between the taper hole 2 and the taper shank portion 4 is fretting corrosion phenomenon. It inherently has the drawback of being easily worn due to factors such as.

Therefore, the spindle 1 and the tool holder 3 are subjected to precision machining, and the reference end face 1a of the spindle 1 is extended to the flange end face 5a side by the facing gap Y to form an extended end face 1a '(see FIG. 6). ), The flange end surface 5a of the tool holder 3 is extended toward the reference end surface 1a by the facing gap Y to form an extended end surface 5a '(FIG. 7), and the taper hole 2 and the taper shank portion 4 are closely fitted to each other. At the same time, it is conceivable to bring the reference end face 1a and the flange end face 5a into close contact with each other. According to this, since the cutting load is also applied to the reference end face 1a, the contact surface between the taper hole 2 and the taper shank portion 4 will not be worn due to the fretting collision phenomenon or the like.

However, when the precision-machined spindle 1 and tool holder 3 are used in common with the tool holder 3 and the spindle 1 of the above-mentioned standard, a manufacturing error (Δ i) is allowed in the standard. Problem arises because of That is, as shown in FIG. 6, the length of the taper shank portion 4 is slightly shortened due to the manufacturing error (Δi) on the main shaft 1 having the extended end surface 1a ′ by precision machining as shown by the phantom line. Or, if the tool holder 3 of the normal standard in which the flange end surface 5a slightly protrudes toward the spindle side due to a manufacturing error is attached, the extension end surface 1a 'of the spindle 1 is fitted before the taper shank portion 4 is closely fitted to the taper hole 2. Since the flange end surface 5a of the tool holder 3 comes into contact with the tool holder 3, a gap β is formed between the tapered hole 2 and the tapered shank portion 4, and it becomes impossible to securely attach the tool holder 3 to the spindle 1. Similarly, as shown in FIG. 7, the tool holder 3 having the flange end surface 5a 'which has been subjected to precision processing and extended has a taper hole 2 slightly lengthened due to a manufacturing error (Δi) as shown by an imaginary line. If the taper hole 2 is attached to the standard spindle 1 that is long or the reference end surface 1a slightly protrudes toward the flange side due to manufacturing error, the reference end surface 1a of the spindle 1 will be attached before the taper shank 4 is fitted closely. Since the extended end surface 5a 'of the tool holder 3 comes into contact with the tool holder 3, a gap β is formed between the tapered hole 2 and the tapered shank portion 4, and the tool holder 3 cannot be securely attached to the spindle 1.

As described above, if the existing reference end face of the spindle or the existing flange end face of the tool holder is extended by the facing gap between them, it can be used as a standard tool holder or spindle. Therefore, the applicant of the present invention has previously proposed a tool holder mounting device capable of solving the above-mentioned inconvenience (Japanese Patent Application No. 4-94526). This tool holder mounting device will be described with reference to FIGS. 8 to 11. This device is one in which the tapered shank portion 4 of the tool holder 3 is fitted in the tapered hole 2 of the main spindle 1 and the existing reference end surface of the main spindle 1 is fitted. 1a and the existing flange end surface 5a of the tool holder 3 have a permissible facing gap Y so that the tool holder 3 can be mounted on the spindle 1 in the existing tool holder mounting device. The reference end face 1a and the existing flange end face 5a of the tool holder 3 facing the reference end face 1a are formed on the extended end faces 1b and 5b by extending the required protrusion amounts α1 and α2 in the mutually opposing direction, Thus, the tool holder 3 is attached to the main shaft 1 so that the two extended end faces 1b and 5b are anastomosed with each other.

According to the above configuration, the reference end surface 1a of the main shaft 1 and the flange end surface 5a of the tool holder 3 are extended by the required protrusion amounts α1 and α2 to form the extended end faces 1b and 5b, and both the extended end faces 1b and 5b are formed. Since the projecting end faces 1b and 5b are anastomosed with each other, the taper shank portion 4 of the tool holder 3 is closely fitted to the taper hole 2 of the spindle 1, and at the same time, the projecting end face 1b of the spindle 1 is fitted to the tool holder 3. The extended end surface 5b can be closely attached. Therefore, the cutting load is also received by both the extending end faces 1b and 5b, and the cutting load is not concentrated between the taper hole 2 and the taper shank portion 4, and the taper hole 2 and the taper shank portion 4 are not applied. The contact surface between and will not be worn due to fretting corrosion phenomenon or the like.

Further, as shown in FIG. 10, a tool holder 3 having a standard end face 1a of a normal standard is attached to a spindle 1 which has been subjected to precision processing to form an extended end face 1b, or as shown in FIG. Even when the tool holder 3 having the extended end face 5b formed by precision machining is mounted on the main spindle 1 having the standard end face 1a of the normal standard, the extended end face 1b or the reference end face 1a of the main shaft 1 and the tool holder 3 are attached. A gap is formed between the flange end face 5a or the extended end face 5b, and the gap absorbs a manufacturing error (Δi) that is normally allowed in the standard. Therefore, the taper shank portion 4 can be surely fitted tightly.

[0009]

[Problems to be solved by the device]

 By the way, as described above, the existing reference end surface 1a of the main shaft 1 and the existing collar end surface 5a of the tool holder 3 facing the existing reference end surface 1a are formed by extending required projection amounts α1 and α2 in the facing direction, respectively. In order to closely fit the taper shank portion 4 of the tool holder 3 into the taper hole 2 of the spindle 1 in the state where the projecting end surfaces 1b and 5b are anastomosed with each other, when manufacturing the spindle 1 and the tool holder 3, the taper hole 2 and The respective taper angles and diameters of the taper shank portion 4, the perpendicularity of the extending end surface 1b with respect to the central axis of the taper hole 2, and the perpendicularity of the extending end surface 5b with respect to the central axis of the taper shank portion 4 are predetermined accuracy. It is necessary to precisely machine the tapered hole 2, the tapered shank portion 4, and the two extended end surfaces 1b and 5b respectively in order to obtain At the time of work, there has been nothing that can easily and accurately measure the inner surface and squareness of the tapered hole with a simple device.

In view of this, the present invention provides a measuring device capable of easily and accurately measuring the positional relationship between the hole surface of the tapered hole and the end face of the spindle, particularly in precision machining of the spindle. The purpose is to do.

[0011]

[Means for Solving the Problems]

 In the measuring device 12 according to claim 1 of the present invention, a flange 17 orthogonal to the central axis is provided at one end of a cylindrical body 16, and the reference end surface 14 of the spindle master gauge 11 is provided on the outer surface of the flange 17. There are provided at least three end face measuring elements 18 that come into contact with the linear actuating body 28, which is fitted in the cylindrical body 16 via the linear actuating bearing 27 and which is linearly actuated in the axial direction. Is provided to the one end side in the axial direction, and a support member 19 projecting from the outer surface of the flange 17 so as to be loosely fitted in the tapered hole 13 of the gauge 11 in a non-contact state One rod-shaped movable probe 20 whose end is in contact with the inner surface of the taper hole 13 of the gauge 11 is displaced through a linear motion bearing 24 within a certain range only in a direction orthogonal to the central axis of the linear motion body 28. As much as possible, At least two supporting elements 21 that come into contact with the inner surface of the tapered hole 13 of the gauge 11 are provided on the same circumference as that of the movable measuring element 20 of FIG. A conversion member 30 for converting the displacement of the movable tracing stylus 20 in the right-angled direction is interposed therebetween, and an indicator 35 for detecting the displacement amount of the movable tracing stylus 20 is linked to the linear actuation body 28 to form the It is provided on the other end side of the tubular body 16.

A measuring device according to a second aspect of the present invention is such that the supporting member comprises a fixed supporting member 21 fixed to the supporting member, and the measuring device according to the third aspect is such that the supporting member has the supporting member. A fixed support 21 fixed to the support member and a support 40 with a spring 39 which is provided on the support member via a spring and is pressed against the inner surface of the tapered hole.

[0013]

【Example】

 An embodiment will be described with reference to the drawings. In FIG. 1, 11 is a spindle master gauge, and 12 is a measuring device used together with the spindle master gauge 11. The main spindle master gauge 11 has a taper hole 13 whose taper angle and inner diameter are accurately machined, and a reference end surface 14 formed at an accurate angle with respect to the central axis of the taper hole 13. Reference numeral 14 is formed on the upper surface of a ring-shaped convex portion 15 projecting from the end surface of the gauge 11.

The configuration of the measuring device 12 will be described in detail. The measuring device 12 has a tubular body 16, and a flange 17 orthogonal to the central axis is provided at a lower end portion (one end portion) of the tubular body 16. On the outer surface of the flange 17, that is, the lower surface, three end surface measuring elements 18 each made of a sphere and contacting the reference end surface 14 of the main spindle master gauge 11 are provided at intervals of 120 degrees in the circumferential direction. (See FIG. 2), each end face measuring element 18 is fitted and fixed in a recess 17a (see FIG. 4) provided on the outer surface of the flange 17 so as to protrude from the lower surface of the flange 17 by a certain amount. Has been done.

A support member 19 which is loosely fitted in the taper hole 13 of the spindle master gauge 11 in a non-contact state is integrally provided on the lower surface of the flange 17 of the tubular body 16. The support member 19 has One rod-shaped movable probe 20 whose outer end contacts the inner surface of the tapered hole 13 of the main spindle master gauge 11 is provided so as to be movable within a certain range only in a direction orthogonal to the central axis of the cylindrical body 16. At the same time, two fixed supporting elements 21 are provided on the same circumference as the movable measuring element 20 so as to come into contact with the inner surface of the tapered hole 13 of the spindle master gauge 11. The movable probe 20 has a sphere 20a fixed to its outer end, and the fixed support 21 is a sphere, and is a recess 19a provided in the outer peripheral surface of the support member 19 (see FIG. 4). It is fitted and fixed to.

The movable measuring element 20 and the fixed supporting element 21 are arranged at intervals of 120 degrees in the circumferential direction as shown in FIG. As shown in FIG. 4, the movable tracing stylus 20 is linearly movably fitted to a cylinder member 23 mounted in a mounting hole 22 of the support member 19 via a linearly operating bearing 24 such as a linear bearing. The inner end portion of the tracing stylus 20 projects into a central hole 25 provided from the central portion of the flange 17 to the support member 19. Further, the cylinder member 23 is fixed to the support member 19 with a fixing screw 26. The lower end screw shaft portion 16a (see FIG. 4) of the tubular body 16 is screwed and fastened to the inlet-side screw hole portion 25a (see FIG. 4) of the central hole 25, whereby the flange 17 is attached to the tubular body 16. Is integrally connected to.

On the other hand, a linear actuating body 28 that linearly operates in the axial direction is fitted in the tubular body 16 via a linear actuating bearing 27 such as a ball bearing or a linear bearing, and the lower end of this linear actuating body 28 is fitted. The part projects into the central hole 25. As shown in FIG. 4, in the central hole 25, a right-angled isosceles triangular connection body 30 as a conversion member pivotally attached to an inner end portion of the cylinder 23 by a pivot pin 29 is arranged. Spheres 31 and 32 that are in contact with the inner end of the movable probe 20 and the lower end of the linear actuation body 28 are fixed to both hypotenuses of the body 30, respectively.

The linear operating body 28 and the right-angled isosceles triangle-shaped connecting body 30 are provided between the holding member 36 screwed into the upper end of the tubular body 16 and the linear operating body 28. A coil spring 33 that presses the outer end of the movable probe 20 against the inner surface of the taper hole 13 of the main spindle master gauge 11 is interposed. A stopper ring 34 is attached to the movable probe 20 to limit the amount of protrusion in the outer end side direction within a certain range. Further, on the upper end side of the tubular main body 16, an indicator 35, which is, for example, a dial gauge, is provided for detecting the displacement amount of the movable probe 20. The indicator 35 is attached with the stem portion 35a penetrating the holding member 36 and fixed, and the measuring terminal 35b in contact with the upper end of the linear actuating body 28.

When using the measuring device 12 having the above-described structure, the supporting member 19 side of the measuring device 12 is inserted into the taper hole 13 of the main spindle master gauge 11 to move the movable measuring element 20 and each fixed support. The probe 21 is brought into contact with the inner surface of the tapered hole 13, and the end face probe 18 on the lower surface of the flange 17 is brought into contact with the reference end face 14 of the gauge 11. In this case, the entire device 12 is appropriately rotated around its central axis to ensure that the end surface measuring elements 18 and the movable measuring elements 20 are in contact with the reference end surface 14 and the inner surface of the tapered hole 13. Then, the pointer 35c of the indicator 35 at that time is adjusted to zero on the scale.

After that, the measuring device 12 is set to a work spindle (not shown) to be precision-machined in the same manner as in the case of the above-mentioned spindle master gauge 11, and the movable probe 20 is set to the above-mentioned work spindle. The end surface measuring element 18 is brought into contact with the end surface of the main shaft while the inner surface of the tapered hole is being contacted, and the measurement value of the indicator 35 is read.

Thus, for example, when the inner diameter of the tapered hole of the main spindle to be processed is smaller than a predetermined dimension value, that is, the inner diameter of the tapered hole of the main spindle master gauge 11, the movable measuring element 20 moves to the cylindrical body 16. Inward with respect to the direction orthogonal to the central axis (inward to the central axis), the isosceles right triangle connecting body 30 pivots about the pivot pin 29 to coil the linear actuator 28. The spring 33 is actuated upward in the axial direction against the biasing force of the spring 33. By this linear actuation of the linear actuating member 28 in the upward axial direction, the pointer 35c of the indicator 35 displays a position that is displaced from zero to, for example, the minor side by an amount corresponding to the displacement amount of the movable probe 20. Therefore, if the inner surface of the tapered hole is ground so that the measured value of the indicator 35 becomes zero, when the measured value becomes zero, the diameter of the tapered hole becomes a predetermined accuracy, and at the same time, the spindle end surface The perpendicularity with respect to the central axis of the tapered hole also has a predetermined accuracy.

When the diameter of the tapered hole of the main spindle to be machined is larger than the predetermined dimension value, the movable measuring element 20 is displaced outward with respect to the direction orthogonal to the central axis of the tubular body 16, and the linear actuator is moved. 28 is actuated downward in the axial direction by the biasing force of the coil spring 33, whereby the measured value of the indicator 35 changes from zero to the positive side. Therefore, in this case, if the spindle end face is ground so that the measured value of the indicator 35 becomes zero, when the measured value becomes zero, the diameter of the taper hole and the squareness of the spindle end face with respect to the central axis of the tapered hole are measured. Both have a predetermined accuracy.

Further, even when the taper angle of the tapered hole is eccentric with respect to a predetermined value, one or both of the inner surface of the tapered hole and the spindle end surface are adjusted so that the measured value of the indicator 35 becomes zero. By grinding, it is possible to obtain a certain degree of accuracy for this taper angle.

In the measuring device 12 described above, the movable tracing stylus 20 and the linear actuating body 28 are configured to linearly act via the linear actuating bearings 24 and 27, respectively. And the linear actuating body 28 with respect to the supporting member 19 and the tubular body 16 during movement in a direction orthogonal to the central axis of the tubular body 16 and during movement in a direction parallel to the central axis of the tubular body 16. There is no rattling or eccentricity. Therefore, the displacement amount of the movable probe 20 is accurately transmitted to the indicator 35, and the measurement accuracy becomes extremely good.

In the measuring device 12 of the embodiment shown in FIGS. 1 and 2, the support member 19 is provided with one movable measuring element 20 and two fixed supporting elements 21, but in the embodiment shown in FIG. Like the measuring device 37, the support member 38 is provided with a support 40 with a spring 39 that presses the inner surface of the taper hole 13 of the spindle master gauge 11 in addition to one movable measurement probe 20 and two fixed supports 21. May be. The support 40 is a sphere. In this case, as shown in the drawing, the mounting shaft body 42 is screwed into the screw hole 41 provided in the support member 38, and the spherical support member 40 is mounted in the fitting hole 43 of the shaft body 42 via the coil spring 39. I wish I had. According to this, the number of supporting members becomes three, and one supporting member 40 elastically contacts the inner surface of the spindle master gauge 11 and the taper hole of the main spindle to be machined, which stabilizes the mounting of the device during measurement, and A reliable measurement can be performed. Further, in this case, two or more such spring-loaded supports may be provided. In FIG. 3, the same members as those in the embodiment of FIG. 2 are designated by the same reference numerals.

In the embodiment described above, the movable probe 20 has the sphere 20a attached to the outer end thereof, but the outer end of the movable probe 20 itself may be integrally formed in a spherical shape. Further, as the conversion member for converting the displacement of the movable probe 20 into the right angle direction, the right-angled isosceles triangular connection body 30 rotatable about the apex is used, but other than this, conversion using a cam or lever is also used. A member can be adopted. Further, although the dial gauge is used as the indicator, an electric micrometer or other appropriate one can be used.

Further, in the embodiment, as the linear operation bearings 24 and 27, ball bearings, linear bearings, etc. are exemplified, but in addition, precision-machined metal bearings may be used. Further, although a spring is illustrated as a means for urging the linear actuating body toward the one end side in the axial direction, when the present device is used with the tubular body in a vertical shape as in the embodiment, Instead of using the spring, the linear actuating body may be urged downward in the axial direction by its own weight.

[0028]

[Operation and effect of the device]

 In the use of the measuring device according to claim 1 of the present invention, the supporting member side of the device is inserted into the taper hole of the main spindle master gauge to bring the movable measuring element and the supporting element into contact with the inner surface of the taper hole, and the end surface. Contact the gauge with the reference end face of the gauge, and in that state, set the measured value of the indicator to zero. Then, for precision machining of the spindle, set this measuring device for the spindle to be machined in the same way as for the spindle master gauge, and read the measured value of the indicator.

In this case, for example, when the inner diameter of the tapered hole of the main spindle to be processed is smaller than a predetermined dimensional value, the movable measuring element shifts inward with respect to the direction orthogonal to the central axis of the tubular body. The displacement is converted in a right angle direction by the conversion member to actuate the linear actuating member against the urging force of the urging means in the direction of the other end of the cylindrical member. Due to the operation of the linear actuating body, the indicator displays a measured value which is shifted from zero to, for example, the minus side by an amount corresponding to the displacement amount of the movable probe. Therefore, if the inner surface of the taper hole is ground so that the measured value of this indicator becomes zero, when the measured value becomes zero, the diameter of the tapered hole becomes a predetermined accuracy, and at the same time, the taper of the end face of the spindle is reduced. The squareness with respect to the hole center axis also has a predetermined accuracy.

Further, when the diameter of the taper hole of the main spindle to be processed is larger than a predetermined dimension value, the movable measuring element is displaced outward with respect to the direction orthogonal to the central axis of the cylindrical body and the linear actuator is attached. The urging force of the urging means actuates toward the one end side of the actuating body, whereby the measured value of the indicator fluctuates from zero to the plus side, contrary to the above case. Therefore, in this case, if the spindle end face is ground so that the measured value of the indicator becomes zero, when the measured value becomes zero, the diameter of the taper hole and the perpendicularity of the spindle end face to the central axis of the tapered hole are both It becomes a predetermined accuracy.

As described above, by using the measuring device of the present invention, the positional relationship between the inner surface of the tapered hole of the spindle and the end surface of the spindle can be easily and accurately measured, and the inner surface of the tapered hole and the end surface of the spindle can be highly accurately measured. Therefore, it is possible to perform precise machining, so that both the extended end faces formed by extending the existing reference end face of the spindle and the existing flange end face of the tool holder facing it with the required protrusion amount in the opposite direction to each other When mounted in this condition, the taper shank portion of the tool holder can be securely fitted into the taper hole of the spindle.

Further, in this measuring device, since the movable measuring element and the linear actuating member are configured to linearly act through the linear actuating bearings, respectively, the movable measuring element and the linear actuating element are When moving in the direction orthogonal to the central axis of the cylindrical body or in the direction parallel to the central axis of the tubular body, the support member and the tubular body do not rattle or become eccentric. Therefore, the displacement amount of the movable probe is accurately transmitted to the indicator, and the measurement accuracy becomes extremely good. Further, since this measuring device has a simple structure and can be made compact, it is convenient for handling such as measuring work, carrying and storing, and can be provided at low cost.

According to the second aspect, the support can be fixed to the support member, so that the support can be easily attached.

Further, according to claim 3, since the spring-loaded support member of the plurality of support members elastically contacts with the inner surface of the tapered hole of the main spindle master gauge or the main spindle to be processed, the device can be mounted during measurement. Stable and more reliable measurement can be performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a measuring device according to an embodiment of the present invention together with a spindle master gauge.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view similar to FIG. 2, showing a measuring apparatus according to another embodiment.

4 is a partially enlarged cross-sectional view of the measuring device shown in FIG.

FIG. 5 is a vertical cross-sectional view showing a conventional example of a tool holder mounting device.

6 is a vertical cross-sectional view showing a modified example of the attachment device of FIG.

FIG. 7 is a vertical sectional view showing still another modified example.

FIG. 8 is a vertical sectional view of a tool holder mounting device proposed by the same applicant as the present invention.

9 is an enlarged cross-sectional view of a main part of the device shown in FIG.

10 is a vertical cross-sectional view showing a state in which a normal-standard tool holder is attached to the spindle of the apparatus shown in FIG.

FIG. 11 is a vertical cross-sectional view of the tool holder of the apparatus shown in FIG. 8 attached to a standard spindle.

[Explanation of symbols]

 11 spindle master gauge 12 measuring device 13 taper hole of spindle master gauge 14 reference end face of spindle master gauge 16 cylindrical body 17 flange 18 end face probe 19 support member 20 movable probe 21 fixed support 24 linear working bearing 27 linear working bearing 28 Linear actuating body 30 Right-angled isosceles triangle-shaped connecting body (converting member) 31 Sphere 32 Sphere 33 Coil spring (biasing means) 35 Indicator 40 Spring supporter

Claims (3)

[Scope of utility model registration request] 1. A cylindrical body is provided with a flange projecting from one end thereof at right angles to the central axis, and at least three end face gauges contacting with the reference end face of the spindle master gauge are provided on the outer surface of the flange. A linear actuating member that linearly actuates in the axial direction is fitted into the cylindrical body through a linear actuating bearing, and a biasing means that biases the linear actuating member toward one end side in the axial direction is provided, and the gauge from the outer surface of the flange. One rod-shaped movable measuring element, the outer end of which contacts the inner surface of the tapered hole of the gauge, is attached to the support member that is provided so as to be loosely fitted in the tapered hole of The movable measuring element is provided so that it can be displaced within a certain range only in a direction orthogonal to the central axis of the actuating body, and at least two supporting elements that come into contact with the inner surface of the tapered hole of the gauge are provided on the same circumference as the movable measuring element. Inner edge of child A conversion member for converting the displacement of the movable measuring element into a right angle direction is provided between the linear operating body and one end of the linear operating body, and an indicator for detecting the displacement amount of the movable measuring element is further linked to the linear operating body. A measuring device provided on the other end side of the tubular body. 2. The measuring device according to claim 1, wherein the supporting member is a fixed supporting member fixed to the supporting member. 3. The fixed member is fixed to the supporting member, and the supporting member is provided on the supporting member via a spring.
The measuring device according to claim 1, comprising a spring-loaded support member that is pressed against the inner surface of the tapered hole.