JP5364685B2 - Jig for measuring axial shape of annular measuring object and axial shape measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig and a device for measuring an axial direction shape of an annular object to be measured, for accurately measuring axial direction shapes of an outer peripheral position and an inner peripheral position respectively at a measurement point of the annular object to be measured. <P>SOLUTION: A jig 1 for measuring an axial direction shape of an annular object 8 to be measured is used when axial direction shapes of an outer peripheral position and an inner peripheral position at a measurement point P of the annular object 8 to be measured are respectively measured, and comprises a pedestal 2, a rotary shaft 3, a rotation base 4 and multiple holding clamps 41 for holding the object to be measured. The multiple holding clamps 41 set the measurement point P of the annular object 8 to be measured to a rotation center A of the rotary shaft 3, and hold the annular object 8 to be measured. The rotation base 4 rotates around the measurement point P by rotating around the rotation center A of the rotary shaft 3, and stops rotating at a first rotation position 401 where the outer peripheral position of the measurement point P is oriented toward a predetermined measurement direction, and at a second rotation position where the inner peripheral position of the measurement point P is oriented toward the predetermined measurement direction. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a jig and an apparatus used for measuring each axial shape of an outer peripheral position and an inner peripheral position at a measurement point as one point in the circumferential direction of an annular measurement object.

An annular loop material or the like used as power transmission means of an automatic transmission is manufactured by cutting a cylindrical material into a predetermined width. And this cutting | disconnection inserts a part of circumferential direction of a cylindrical raw material between each cutting blade of a pair of cutters arrange | positioned at the inner peripheral side and outer peripheral side of a cylindrical raw material, and is cylindrical with respect to a pair of cutters. This is done by relatively rotating the entire circumference of the material.
An example of such a rotary cutting device is a metal thin plate drum cutting device disclosed in Patent Document 1. In this cutting apparatus, a pair of chevron-shaped rolling cutters are brought into contact with the outer peripheral surface and inner peripheral surface of the drum, and the servo motor is driven to rotate the drum held by the press contact member. Then, the drum can be cut while the pair of rolling cutters rotate with the drum.

JP 2010-64177 A

By the way, in order to measure the axial shape (cut width) of an annular measurement object such as a loop material cut from a cylindrical material, a predetermined measuring device is required.
However, in order to accurately measure the axial shape of such an annular measurement object at both the outer peripheral position and the inner peripheral position, it is necessary to devise the structure of the measuring apparatus. In particular, when the axial end surface of the annular measurement object is cut into a chevron cross-sectional shape by cutting with a pair of chevron-shaped rolling cutters, the axial shape of the outer peripheral position and the inner peripheral position is accurately determined. It is difficult to measure.

  The present invention has been made in view of such conventional problems, and the axial direction of the annular measurement object for accurately measuring the axial shape of the outer peripheral position and the inner peripheral position at the measurement point of the annular measurement object. An object is to provide a shape measuring jig and an axial shape measuring device.

1st invention is a jig | tool used when measuring each axial direction shape of the outer peripheral position and inner peripheral position in the measuring point as one point of the circumferential direction of an annular | circular shaped measurement object,
A pedestal fixed to the measurement table of the measuring device, a rotation shaft rotatably supported on the gantry, a rotation base that rotates integrally with the rotation shaft, and the rotation base, A plurality of holding clamps for holding an annular workpiece,
The plurality of holding clamps are configured to hold the annular measurement object by aligning the measurement point with the rotation center of the rotation shaft,
The rotation base is rotated about the measurement point by the rotation axis, and a first rotation position in which an outer peripheral position of the measurement point is directed in a predetermined measurement direction, and an inner peripheral position of the measurement point The jig for measuring the axial shape of an annular measurement object is characterized in that the rotation is stopped at the second rotation position directed in the predetermined measurement direction (claim 1).

The second invention is a measurement table for fixing an axial shape measurement jig of an annular measurement object, and a measurement for measuring each axial shape of an outer peripheral position and an inner peripheral position at the measurement point of the annular measurement object. A measuring device comprising a child,
The axial shape of the outer peripheral position is measured by the probe with the rotation base fixed at the first rotation position, and the rotation base is fixed at the second rotation position. It is configured to measure the axial shape of the inner peripheral position with a probe,
While maintaining the mounting state of the axial shape measuring jig with respect to the measuring table and maintaining the holding state of the annular measuring object by the plurality of holding clamps, the measuring point is centered by the rotating shaft. The rotation base is rotated between the first rotation position and the second rotation position to measure the axial shape of the outer peripheral position and the axial shape of the inner peripheral position. An apparatus for measuring an axial shape of an annular object to be measured is characterized in that it is configured to perform (Claim 2).

The jig for measuring an axial shape according to the first aspect of the invention is a jig used for a measuring device that performs measurement in contact or non-contact with an annular measurement object. This is for accurately measuring each axial shape of the outer peripheral position and the inner peripheral position at the point.
Specifically, the axial shape measurement jig has a rotation shaft, a rotation base, and a plurality of holding units with respect to a mount placed on a measurement table such as a measuring device for measuring each axial shape. A clamp is provided. Further, the holding clamp is configured to hold the annular measurement object by aligning the measurement point with the rotation center of the rotation shaft.

  Then, when measuring the axial shape of the outer peripheral position at the measurement point of the annular measurement object, the rotation base is fixed to the first rotation position. At this time, the outer peripheral position of the measurement point is directed to the measurement site in the measurement apparatus which is a predetermined measurement direction. Thereby, the axial shape of the outer peripheral position at the measurement point of the annular measurement object can be accurately measured by the measuring device.

Further, when measuring the axial shape of the inner peripheral position at the measurement point of the annular measurement object, the rotation base is rotated by the rotation shaft while the annular measurement object is held by the plurality of holding clamps. . At this time, since the annular measurement object is held on the rotation base with its measurement point aligned with the rotation center of the rotation axis, the front and back of the annular measurement object is inverted around the measurement point. The inner peripheral position of the point is directed to the measurement site in the measurement device that is the predetermined measurement direction. Thereby, when switching from the measurement of the axial shape of the outer peripheral position to the measurement of the axial shape of the inner peripheral position, the annular measurement object is not replaced with respect to the axial shape measurement jig, Further, no positional deviation occurs in the axial direction with respect to the axial shape measuring jig. Therefore, the axial shape of the inner peripheral position at the measurement point of the annular measurement object can be accurately measured by the measuring device.
It is also possible to measure the axial shape of the inner peripheral position before measuring the axial shape of the outer peripheral position. Even if any axial shape is measured first, the measurement can be performed accurately.

Therefore, according to the jig for measuring the axial shape of the annular measuring object of the first invention, the measuring device accurately determines the axial shape of the outer peripheral position and the inner peripheral position at the measurement point of the annular measuring object. Can be measured.
Further, according to the axial shape measuring apparatus for the annular measuring object of the second invention, each of the outer peripheral position and the inner peripheral position at the measurement point of the annular measuring object can be obtained by using the axial shape measuring jig. The axial shape can be measured accurately.

Explanatory drawing which shows the state which looked at the axial direction shape measurement jig | tool which made the rotation base into the 1st rotation position concerning the Example from the axial direction of the rotation axis. Explanatory drawing which shows the axial direction shape measuring jig which made the rotation base the 2nd rotation position concerning the Example in the state seen from the axial direction of the rotation axis. Cross-sectional explanatory drawing which shows the axial direction shape measuring jig concerning an Example in the state seen from the side. Cross-sectional explanatory drawing which shows the formation part of the holding clamp in the jig | tool for axial direction shape measurement concerning an Example in the state seen from the side. Explanatory drawing which shows the axial direction shape measuring apparatus concerning an Example. Sectional drawing which shows the state which measures the axial direction shape of the outer periphery position in the measurement point of an annular | circular shaped measurement object by a measuring element concerning an Example. Sectional drawing which shows the state which measures the axial direction shape of the inner peripheral position in the measurement point of an annular | circular shaped measurement object by a measuring element concerning an Example. Explanatory drawing which shows the belt for CVT using the loop material concerning an Example. Explanatory drawing which shows typically the axial direction shape of the outer periphery position in the measurement point measured by the measuring apparatus concerning an Example. Explanatory drawing which shows typically the cross-sectional outline shape in the measurement point produced from the axial direction shape of the outer peripheral position and inner peripheral position in the measurement point which measured the measuring apparatus concerning an Example. The perspective view which shows the state which cuts a cylindrical raw material with a pair of cutting tool and forms a loop material concerning an Example. Sectional drawing which shows the state which cut | disconnected by a pair of blade tool concerning Example, and formed the loop material.

The preferred embodiments of the jig for measuring the axial shape of the annular measuring object and the axial shape measuring apparatus according to the first and second inventions described above will be described.
2nd invention WHEREIN: As for the said annular | circular shaped measurement object, the axial direction one end surface and the axial other end surface are formed in the mountain-shaped cross-sectional shape, and the said axis | shaft is used as an axial direction shape of the outer periphery position in the said measurement point. Measure the axial width between the base end side corner on the outer peripheral side in the chevron cross-sectional shape of one end surface in the direction and the base end side corner on the outer peripheral side in the chevron cross-sectional shape of the other end surface in the axial direction. The axial shape of the inner peripheral position at the measurement point is the inner corner of the inner peripheral side of the chevron cross-sectional shape of the one end surface in the axial direction and the inner shape of the chevron cross-sectional shape of the other end surface in the axial direction. It is preferable that the width in the axial direction between the peripheral corners on the base end side is measured (claim 3).
In this case, it is possible to accurately measure the axial shape at the outer peripheral position of the measurement point and the axial shape at the inner peripheral position of the measurement point with respect to the annular measurement object having both end surfaces in the axial direction of the mountain-shaped cross section. it can.

Further, the annular measurement object is a loop material used for a continuously variable transmission, and a cylindrical material is sandwiched between a pair of cutting tools having an outer peripheral cutting edge portion having a chevron-shaped cross section, and the entire circumference of the cylindrical material is It is preferable that the cylindrical material is cut to a predetermined width by rotating the blade relative to the pair of blades.
In this case, the manufacturing of the loop material can be performed quickly, and the symmetry in the inner and outer peripheral directions in the cross section across the circumferential direction of the manufactured loop material can be accurately measured.

Hereinafter, embodiments of an axial shape measuring jig and an axial shape measuring apparatus for an annular measurement object of the present invention will be described with reference to the drawings.
The axial shape measuring jig 1 (hereinafter simply referred to as the measuring jig 1) of the annular measuring object 8 of the present example is shown in FIGS. 1 to 3 in the circumferential direction C of the annular measuring object 8. It is a jig used when measuring each axial shape of the outer peripheral position 82 and the inner peripheral position 83 at the measurement point P as one point. The axial shape measuring jig 1 includes a gantry 2 placed on a measuring table 51 of an axial shape measuring device 5 (hereinafter simply referred to as a measuring device 5), and a turn supported rotatably with respect to the gantry 2. The moving shaft 3, the rotating base 4 that rotates integrally with the rotating shaft 3, and a plurality of holding clamps 41 that are provided on the rotating base 4 and hold the annular measuring object 8 are provided.

  The plurality of holding clamps 41 are configured to hold the annular measuring object 8 by aligning the measurement point P of the annular measuring object 8 with the rotation center A of the rotating shaft 3. The rotation base 4 rotates about the measurement point P by rotating about the rotation center A of the rotation shaft 3, and the outer peripheral position 82 of the measurement point P is directed to a predetermined measurement direction. The first rotation position 401 (see FIG. 1) and the inner circumferential position 83 of the measurement point P are configured to stop rotating at a second rotation position 402 (see FIG. 2) oriented in a predetermined measurement direction. .

Hereinafter, the measuring jig 1 and the measuring device 5 of the annular measuring object 8 of this example will be described with reference to FIGS.
The measuring jig 1 of this example is placed on the measuring table 51 of the measuring device 5 and used for measuring the axial shape of the annular measuring object 8.
As shown in FIG. 8, the annular measuring object 8 of this example is a loop member 8 used for a continuously variable transmission (belt type CVT (Continuously Variable Transmission)). The continuously variable transmission is configured by a pair of pulleys and a CVT belt 7 spanned between the pair of pulleys, and the loop material 8 is used for the CVT belt 7. The CVT belt 7 is formed by attaching a large number of elements 81 as friction parts to the entire circumference of the loop material 8 in which a plurality of layers are laminated. A plurality of the loop members 8 stacked on each other are spanned on both sides of each element 81.

  As shown in FIG. 11, the loop member 8 of the present example includes a pair of cutting tools 61 each having an outer peripheral cutting edge portion 611 having a mountain-shaped cross section, and sandwiches the cylindrical material 80 so that the entire circumference of the cylindrical material 80 is paired. The cylindrical material 80 is cut to a predetermined width by rotating and moving relative to the cutting tool 61. And the axial direction one end surface 81A and the axial other end surface 81B of the annular measuring object 8 are formed in a mountain-shaped cross-sectional shape as a cross-sectional shape when the annular measuring object 8 is cut orthogonally to the axial direction L. .

6 is an enlarged view showing a state in which the axial shape of the outer peripheral position 82 is measured by the measuring element 52, and FIG. 7 is an enlarged view showing a state in which the axial shape of the inner peripheral position 83 is measured by the measuring element 52. . FIG. 10 is a diagram schematically showing a cross-sectional contour shape at the measurement point P of the annular measurement object 8.
In this example, as shown in FIGS. 6 and 10, as the axial shape of the outer peripheral position 82 at the measurement point P, the proximal-side corner portion 821 on the outer peripheral side in the mountain-shaped cross-sectional shape of the axial one end surface 81A, An axial width W1 between the outer peripheral side proximal end corner portion 821 in the mountain-shaped cross-sectional shape of the other end surface 81B in the direction is measured. Further, as shown in FIGS. 7 and 10, as the axial shape of the inner peripheral position 83 at the measurement point P, the proximal end corner portion 831 on the inner peripheral side in the mountain-shaped cross section of the axial one end surface 81A, and the axial direction The axial width W2 between the inner peripheral side corner portion 831 in the mountain-shaped cross-sectional shape of the other end surface 81B is measured.

  As shown in FIG. 3, in the measurement jig 1, the rotation shaft 3 is pivotally supported by a bearing portion 21 provided on the gantry 2. In the gantry 2, position fixing portions 22 are respectively formed at predetermined radial positions from the rotation center (shaft center) A of the bearing portion 21 and at phases different from each other by 180 ° around the bearing portion 21. Yes. Further, the rotation base 4 has a position fixing engagement portion 42 that can be engaged with the position fixing portion 22 at the same predetermined radial position as the position fixing portion 22 from the rotation center A of the rotation shaft 3. Is formed. The position fixing portion 22 in this example is an engagement hole provided in two places of the gantry 2, and the position fixing engagement portion 42 in this example is an engagement hole provided in the rotation base 4. When the rotation base 4 is set to the first rotation position 401 and to the second rotation position 402, the engagement as the position fixing engagement portion 42 is engaged with the engagement hole as the position fixing portion 22. The hole is opposite. In these states, by inserting the engagement pin 43 from the engagement hole serving as the position fixing engagement portion 42 into the engagement hole serving as the position fixing portion 22, the rotation shaft 3 and the rotation base 4 are rotated relative to the gantry 2. The movement can be fixed.

The holding clamp 41 of this example is configured to hold the annular measuring object 8 at positions on both the left and right sides with respect to the rotation center A of the rotation shaft 3. The holding clamp 41 sandwiches the annular measuring object 8 between the protruding receiving part 411 positioned on the inner peripheral side of the annular measuring object 8 and the protruding receiving part 411 positioned on the outer peripheral side of the annular measuring object 8. For this purpose, a clamp portion 412 is provided. The clamp part 412 of this example is configured by a toggle clamp.
Further, the rotation base 4 of this example is provided with a handle 44 for the measurer to manually rotate the rotation base 4 and the rotation shaft 3. Then, the measurement jig 1 is manually switched between the first rotation position 401 and the second rotation position 402, and each axis of the outer peripheral position 82 and the inner peripheral position 83 at the measurement point P of the annular measurement object 8. It is configured to measure the directional shape. On the other hand, the measuring jig 1 can be configured to switch between the first rotation position 401 and the second rotation position 402 using an actuator such as a motor or a cylinder.

FIG. 1 shows a state in which the rotation base 4 in the measurement jig 1 is in the first rotation position 401, and FIG. 2 shows the rotation base 4 in the measurement jig 1 in the second rotation position 402. Indicates the state.
When the rotation base 4 is at the first rotation position 401, the annular measurement object 8 is positioned below the rotation shaft 3, and the clamp portion 412 of the holding clamp 41 is positioned above the rotation shaft 3. On the other hand, when the rotation base 4 is at the second rotation position 402, the annular measurement object 8 is positioned above the rotation shaft 3, and the clamp portion 412 of the holding clamp 41 is positioned below the rotation shaft 3. .

In this example, as shown in FIG. 5, the measurement jig 1 is placed on the measurement table 51 of the measurement apparatus 5, and a plurality of holding clamps 41 in the measurement jig 1 are used by the probe 52 of the measurement apparatus 5. The shape of each axial direction of the outer peripheral position 82 and the inner peripheral position 83 at the measurement point P of the annular measuring object 8 held in is measured.
The measuring device 5 is in contact with the measuring table 51 on which the measuring jig 1 is placed and fixed, and the annular measuring object 8 held on the measuring jig 1, and the outer peripheral position 82 and the inner peripheral position at the measuring point P. 83, a measuring element 52 for measuring the shape in each axial direction, a moving means 53 for moving the measuring element 52 to an arbitrary part with respect to the measuring table 51, and measurement information collected by the measuring element 52 to measure the size, shape, etc. And a display means 55 for displaying the measurement result.

  As shown in the figure, the measuring element 52 is provided at the distal end portion of the arm 531 with the measurement distal end portion 521 hanging downward, and the measurement distal end portion 521 contacts the annular measurement object 8 to be measured. Sometimes configured to swing up and down. The calculation means 54 is configured to detect a change in the trajectory of the measurement tip 521 of the probe 52. Then, the calculation means 54 assumes that the position at which the height position of the measuring element 52 changes abruptly is the position of the base end side corners 821 and 831, and the outer peripheral position 82 and the inner position at the measurement point P of the annular measuring object 8. Each axial shape of the circumferential position 83 can be calculated. The moving means 53 is constituted by a moving device that moves the measuring element 52, and the calculating means 54 is constituted by a computer.

  As shown in FIGS. 1 and 6, the measuring device 5 measures the axial shape of the outer peripheral position 82 with the measuring element 52 in a state where the rotating base 4 is fixed to the first rotating position 401, and FIG. As shown in FIG. 7, the axial shape of the inner peripheral position 83 is measured by the measuring element 52 in a state where the rotation base 4 is fixed to the second rotation position 402. Then, the measuring device 5 performs the measurement with the rotating shaft 3 while maintaining the mounting state of the measuring jig 1 on the measuring table 51 and maintaining the holding state of the annular measuring object 8 by the plurality of holding clamps 41. The pivot base 4 is pivoted about the point P to the first pivot position 401 and the second pivot position 402 to measure the axial shape of the outer peripheral position 82 and the axial shape of the inner peripheral position 83. It is comprised so that.

Further, the calculation means 54 collates and compares the axial shape of the outer peripheral position 82 at the measurement point P with the axial shape of the inner peripheral position 83 at the measurement point P, detects a difference between these shapes, and performs an annular measurement. The symmetry between the mountain-shaped cross-sectional shape of the axial one end surface 81A of the object 8 and the mountain-shaped cross-sectional shape of the axially other end surface 81B of the annular measuring object 8 can be determined.
Further, in the measuring device 5, the positions of the annular measuring object 8 held by the plurality of holding clamps 41 in the measuring jig 1 are appropriately changed so as to change the circumferential measuring object 8 in the circumferential direction C. With the location as the measurement point P, the axial shape of the outer peripheral position 82 and the inner peripheral position 83 at each measurement point P can be measured.

FIG. 9 schematically shows a state in which the axial shape of the outer peripheral position 82 at the measurement point P measured by the measurement device 5 is displayed by the display means 55, and FIG. 10 shows the measurement point P measured by the measurement device 5. A state in which the cross-sectional contour shape at the measurement point P created from the axial shape of the outer peripheral position 82 and the inner peripheral position 83 is displayed by the display means 55 is schematically shown.
As shown in FIG. 10, the calculation means 54 uses either the data obtained by measuring the axial shape of the outer peripheral position 82 of the measurement point P and the data obtained by measuring the axial shape of the inner peripheral position 83 of the measurement point P. By reversing the data by 180 ° and translating in the plate thickness direction by the design plate thickness of the annular measuring object 8, and combining them as one shape data, the measured circumferential direction C of the annular measuring object 8 is obtained. The cross-sectional contour shape at the measurement point P can be obtained. And the display means 55 can display this cross-sectional shape.

In addition, the calculation means 54 calculates, from the shape data, the thickness t of the annular measurement object 8, the maximum axial width W of the annular measurement object 8, and the mountain shape of the mountain-shaped cross-sectional shape at the axial end faces 81A and 81B. The angle θ can be obtained.
In addition, by processing the shape data, the contour of the apex portion 84 of the mountain-shaped cross-sectional shape on both end surfaces 81A and 81B in the axial direction of the annular measuring object 8 can also be expressed.

In this example, the measuring device 5 detects an error between the axial shape of the outer peripheral position 82 and the axial shape of the inner peripheral position 83 of the annular measuring object 8, and when these errors exceed a predetermined value, Correction of the cutting device 6 that cuts the loop material 8 as the annular measuring object 8 is performed.
As shown in FIGS. 11 and 12, the cutting device 6 includes a pair of cutting tools 61 each having an outer peripheral cutting edge portion 611 having a chevron-shaped cross-section, and the outer peripheral cutting edge portions 611 of the pair of cutting tools 61 are arranged inside and outside the cylindrical material 80. The entire circumference of the cylindrical material 80 is relatively moved relative to the pair of cutting tools 61 with the circumference interposed therebetween, and the cylindrical material 80 is cut into a predetermined width. When the error exceeds a predetermined value, the positional relationship between the pair of blades 61 is finely adjusted, and the shape of the axial one end surface 81A and the other axial end surface 81B of the loop member 8 as the annular measuring object 8 is determined. Ensure symmetry. In addition, after the loop material 8 is cut by the cutting device 6, the axial end surfaces 81A and 81B are polished into a predetermined shape by a polishing device to obtain a product.

  When measuring the axial shape of the outer peripheral position 82 at the measurement point P of the annular measurement object 8 using the measurement jig 1 and the measurement device 5 of this example, the rotation base 4 is moved to the first rotation position. It fixes to 401. At this time, the outer peripheral position 82 of the measurement point P is directed upward where the probe 52 is positioned as a predetermined measurement direction. Thereby, the axial shape of the outer peripheral position 82 at the measurement point P of the annular measuring object 8 can be accurately measured by the measuring device 5.

  Further, when measuring the axial shape of the inner peripheral position 83 at the measurement point P of the annular measuring object 8, the annular measuring object 8 is held by the plurality of holding clamps 41 and rotated by the rotating shaft 3. The moving base 4 is rotated. At this time, since the annular measuring object 8 is held by the rotation base 4 with the measurement point P aligned with the rotation center A of the rotation shaft 3, the annular measurement object 8 is centered on the measurement point P. The inner and outer positions 83 of the measurement point P are turned upward as the predetermined measurement direction.

Thereby, when switching from the measurement of the axial shape of the outer peripheral position 82 to the measurement of the axial shape of the inner peripheral position 83, the annular measuring object 8 is not replaced with the measuring jig 1. Further, no positional deviation occurs in the axial direction L with respect to the measuring jig 1. That is, in the measurement jig 1, there are hardly any measurement errors that occur when the measurement jig 1 is fixed to the measurement table 51 and measurement errors that occur when the annular measuring object 8 is changed. Therefore, the measuring device 5 can also accurately measure the axial shape of the inner circumferential position 83 at the measurement point P of the annular measuring object 8.
Note that the axial shape of the inner peripheral position 83 can be measured before the axial shape of the outer peripheral position 82 is measured. Moreover, even if any axial shape is measured first, the measurement can be performed accurately.

  Further, in the measuring device 5 using the measuring jig 1, the axial shapes of the outer peripheral position 82 and the inner peripheral position 83 of the measurement point P can be measured without replacing the annular measuring object 8. Therefore, the time required for these measurements can be shortened. Thereby, each axial shape of the outer peripheral position 82 and the inner peripheral position 83 at a plurality of locations in the circumferential direction C in the same annular measuring object 8 can be quickly measured.

  Therefore, according to the measurement jig 1 and the measuring device 5 of the annular measurement object 8 of the present example, the axial shapes of the outer peripheral position 82 and the inner peripheral position 83 at the measurement point P of the annular measurement object 8 are accurately determined. Can be measured.

DESCRIPTION OF SYMBOLS 1 Axial shape measurement jig | tool 2 Base 3 Rotating shaft 4 Rotating base 401 1st rotating position 402 2nd rotating position 41 Holding clamp 5 Axial shape measuring device 51 Measuring stand 52 Measuring element 6 Cutting processing device 61 A pair of blades 8 Annular measurement object (loop material)
81A One end surface in the axial direction 81B The other end surface in the axial direction 82 Outer periphery position 83 Inner periphery position C Circumferential direction L Axial direction P Measurement point

Claims (4)

A jig used when measuring each axial shape of the outer peripheral position and the inner peripheral position at a measurement point as one point in the circumferential direction of the annular measurement object,
A pedestal fixed to the measurement table of the measuring device, a rotation shaft rotatably supported on the gantry, a rotation base that rotates integrally with the rotation shaft, and the rotation base, A plurality of holding clamps for holding an annular workpiece,
The plurality of holding clamps are configured to hold the annular measurement object by aligning the measurement point with the rotation center of the rotation shaft,
The rotation base is rotated about the measurement point by the rotation axis, and a first rotation position in which an outer peripheral position of the measurement point is directed in a predetermined measurement direction, and an inner peripheral position of the measurement point A jig for measuring an axial shape of an annular measurement object, wherein the jig is configured to stop rotating at a second rotation position directed in the predetermined measurement direction. A measurement table for fixing the jig for measuring an axial shape of the annular measurement object according to claim 1, and a measurement for measuring each axial shape of an outer peripheral position and an inner peripheral position at the measurement point of the annular measurement object. A measuring device comprising a child,
The axial shape of the outer peripheral position is measured by the probe with the rotation base fixed at the first rotation position, and the rotation base is fixed at the second rotation position. It is configured to measure the axial shape of the inner peripheral position with a probe,
While maintaining the mounting state of the axial shape measuring jig with respect to the measuring table and maintaining the holding state of the annular measuring object by the plurality of holding clamps, the measuring point is centered by the rotating shaft. The rotation base is rotated between the first rotation position and the second rotation position to measure the axial shape of the outer peripheral position and the axial shape of the inner peripheral position. An apparatus for measuring an axial shape of an annular object to be measured, wherein In the axial shape measuring device of the annular measuring object according to claim 2, the annular measuring object is formed such that one end surface in the axial direction and the other end surface in the axial direction are formed in a chevron cross-sectional shape,
As the axial shape of the outer peripheral position at the measurement point, the base end side corner on the outer peripheral side of the chevron cross-sectional shape of the one axial end surface and the base of the outer peripheral side of the chevron cross-sectional shape of the other axial end surface The axial width between the end corners is measured, and as the axial shape of the inner peripheral position at the measurement point, the base end side corner on the inner peripheral side in the mountain-shaped cross-sectional shape of the one end surface in the axial direction The axial shape of the annular measuring object is configured to measure an axial width between the inner end side corner portion of the chevron cross-sectional shape of the other end surface in the axial direction. measuring device.   The axial shape measuring device for an annular measurement object according to claim 2 or 3, wherein the annular measurement object is a loop material used for a continuously variable transmission and has an outer peripheral cutting edge portion having a mountain-shaped cross section. A cylindrical material is sandwiched between a pair of blades, and the entire circumference of the cylindrical material is rotated relative to the pair of blades to cut the cylindrical material to a predetermined width. An apparatus for measuring an axial shape of an annular object to be measured.

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