JP6866753B2 - Shape measurement method and shape measurement device - Google Patents

Description

The present invention relates to a shape measuring method and a shape measuring device for measuring the shape of an article.

For articles having a tubular portion, a shape inspection in the circumferential direction of the tubular portion may be performed. In Patent Document 1, the opening of the glass bottle placed on the turntable is supported, and the turntable is rotationally driven to rotate the tubular portion of the glass bottle in the circumferential direction, and the thickness of the tubular portion of the glass bottle is thickened. Is disclosed as a method of measuring.

Japanese Unexamined Patent Publication No. 2000-337819

In the above-mentioned conventional shape measuring method, when an article having a tubular portion such as a glass bottle is rotated in the circumferential direction, a mechanism for pressing the article against a turntable to hold the article is required, and the shape measuring device is provided by such a mechanism. There is still room for improvement, such as increasing the size.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a shape measuring method and a shape measuring device capable of suitably measuring the shape of a tubular portion of an article in the circumferential direction. ..

The shape measuring method for solving the above problems is a shape measuring method for measuring the shape of the tubular portion in the circumferential direction of an article having a tubular portion, and the support portion for supporting the inside of the tubular portion of the article and the said. The cylinder is formed by a rotation step of rotating the article in the circumferential direction of the tubular portion by a rotation support mechanism having a rotation drive portion for rotationally driving the support portion, and a sensor arranged outside the tubular portion of the article. It is provided with a measurement process for measuring the shape of the shaped portion.

According to this method, since the rotation support mechanism used in the rotation step has a support portion that supports the inside of the tubular portion of the article, it is possible to prevent the support portion of the rotation support mechanism from protruding to the outside of the article. be able to. Thereby, for example, it is possible to prevent the shape measuring device from becoming large in size.

In the shape measurement method, the article has a bottom portion that closes one end of the tubular portion, and in the rotation step, the article is rotated in an inverted posture with the opening of the other end of the tubular portion facing downward. It is preferable to let it.

According to this method, the article can be rotated in a more stable state in the rotation step.
In the shape measurement method, the rotation support mechanism may have a contact portion that protrudes from the support portion so as to be coaxial with the rotation axis of the support portion and that abuts on the inner surface of the bottom portion of the article. preferable.

According to this method, by supporting the article on the support portion so as to align the center of the bottom portion of the article with the contact portion of the rotation support mechanism, it becomes easy to match the rotation reference of the article. Further, the vertical position of the article can be adjusted by the contact portion of the rotation support mechanism. Further, by setting the contact position where the contact portion of the rotation support mechanism abuts on the inner surface of the article as a reference position, the measurement position of the tubular portion of the article can be easily set.

In the shape measurement method, the tubular portion of the article has a constricted portion having a diameter smaller than the opening of the tubular portion, and the support portion of the rotation support mechanism is a rotation of the rotation support mechanism. It has a tapered surface having a shape whose outer diameter changes along the axis, and in the rotation step, it is preferable that the constricted portion is supported by the tapered surface of the supporting portion.

According to this method, the constricted portion of the article can be stably supported by the tapered surface in the support portion of the rotation support mechanism. Thereby, in the rotation step, the article having the constricted portion can be rotated in a more stable state.

In the shape measuring method, in the rotation step, it is preferable to guide the rotation of the tubular portion by a positioning member that contacts the outer peripheral surface of the tubular portion of the article and positions the tubular portion.

According to this method, the article can be rotated in a more stable state in the rotation step.
In the shape measuring method, it is preferable that the positioning member includes a pair arranged so as to sandwich the tubular portion.

According to this method, the article can be rotated in a more stable state in the rotation step.
In the shape measurement method, the sensor is configured to be movable at least along the axial direction of the rotation axis of the rotation support mechanism, and in the measurement step, the tubular portion is formed at a plurality of locations along the axis direction. It is preferable to measure the shape.

According to this method, it becomes easy to cope with the inspection of an article that requires higher shape accuracy.
In the shape measurement method, the article may be a glass article for a thermos bottle having a bottom portion that closes one end of the tubular portion and having a curved surface whose outer surface is convex outward.

When the above-mentioned glass article for a thermos is rotated on a turntable as in the conventional case, it is difficult to match the rotation reference. That is, since the outer surface of the bottom of the article is a curved surface, when the outer surface of the bottom is supported on the turntable, the tubular portion tends to be in an inclined posture with respect to the rotation axis of the turntable. Further, the opening of the article does not always form a surface perpendicular to the axial direction of the tubular portion, and even when such an opening is supported on the turntable, the tubular portion does not always form. Is likely to be in an inclined position with respect to the rotation axis of the turntable. The rotation support mechanism used in the shape measurement method has a support portion that supports the inside of the tubular portion of the article. In this case, the axial direction of the tubular portion can be aligned with the rotation axis in the rotation drive portion of the rotation support mechanism without depending on the shape of the bottom portion or the opening of the article.

The shape measuring device that solves the above problems is a shape measuring device that measures the shape of the tubular portion in the circumferential direction of an article having a tubular portion, and is a support portion that supports the inside of the tubular portion of the article and the said. It has a rotary drive unit that rotationally drives the support portion, a rotary support mechanism that rotates the article in the circumferential direction of the tubular portion, and a tubular portion that is arranged outside the tubular portion of the article. It is equipped with a sensor that measures the shape of.

According to the present invention, the shape of the tubular portion of an article in the circumferential direction can be suitably measured.

It is a schematic front view which shows the shape measuring apparatus in embodiment. It is a schematic plan view which shows the shape measuring apparatus. It is a schematic front view which shows the modification example of the shape measuring apparatus.

Hereinafter, the shape measuring method and the embodiment of the shape measuring device will be described with reference to the drawings. In the drawings, for convenience of explanation, a part of the configuration may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ from the actual one.

As shown in FIGS. 1 and 2, in the shape measuring method and the shape measuring device 11 of the present embodiment, the article 12 to be measured is a glass article for a thermos bottle.
As shown in FIG. 1, the article 12 has a tubular portion 13. The article 12 has a bottom portion 14 that closes one end of the tubular portion 13 and an opening 15 that opens to the other end of the tubular portion 13. The outer surface of the bottom 14 of the article 12 is formed by a curved surface that is convex outward. The tubular portion 13 of the article 12 has a constricted portion 13a whose diameter is smaller than that of the opening 15. Article 12 is used as an inner bottle of a thermos bottle including an outer bottle and an inner bottle. Article 12 can be obtained, for example, by a blow-and-blow type rotary blow molding method described in Japanese Patent Application Laid-Open No. 02-137738.

The shape measuring device 11 is used to measure at least the shape of the tubular portion 13 of the article 12 in the circumferential direction. The shape measuring device 11 includes a rotation support mechanism 16 that rotates the article 12 in the circumferential direction of the tubular portion 13, and a sensor 17 that is arranged outside the tubular portion 13 of the article 12 and measures the shape of the tubular portion 13. And have.

The rotation support mechanism 16 of the shape measuring device 11 has a support portion 18 that supports the inside of the tubular portion 13 of the article 12, and a rotation drive portion 19 that rotationally drives the support portion 18. The rotation support mechanism 16 of the present embodiment further has a contact portion 20 that abuts on the inner surface of the bottom portion 14 of the article 12.

The support portion 18 of the rotation support mechanism 16 in the present embodiment supports the article 12 in an inverted posture with the opening 15 of the tubular portion 13 of the article 12 facing downward. The support portion 18 of the rotation support mechanism 16 has a tapered surface 18a having a shape whose outer diameter changes along the rotation axis AR of the rotation support mechanism 16. The tapered surface 18a of the support portion 18 is configured to support the constricted portion 13a of the article 12. More specifically, the tapered surface 18a of the support portion 18 in the present embodiment has a shape that increases in diameter as it approaches the opening 15 of the article 12, and the inner surface of the constricted portion 13a of the article 12 comes into contact with the tapered surface 18a. The outer diameter dimension of the support portion 18 of the rotation support mechanism 16 can be set according to the inner diameter dimension of the constricted portion 13a of the article 12. From the viewpoint of suppressing the idling of the article 12, the support portion 18 of the rotation support mechanism 16 preferably has an outer surface made of an elastic body that can be elastically deformed along the inner surface of the constricted portion 13a of the article 12. The elastic body is preferably composed of rubber or an elastomer. The elastic body may be a foamed material or a non-foamed material.

The rotation drive unit 19 of the rotation support mechanism 16 includes, for example, a motor. The rotation drive unit 19 is fixed to the base B of the shape measuring device 11. The contact portion 20 of the rotation support mechanism 16 is projected from the support portion 18 so as to be coaxial with the rotation axis AR in the support portion 18 of the rotation support mechanism 16.

As the sensor 17 of the shape measuring device 11, it is preferable to use a non-contact type displacement sensor. The sensor 17 can measure the degree of deformation (roundness) of the tubular portion 13 of the article 12, the surface roughness of the tubular portion 13 of the article 12, the wall thickness of the tubular portion 13 of the article 12, and the like. For example, the wall thickness of the tubular portion 13 can be measured by using a displacement sensor that can detect the reflection of light on the outer surface of the tubular portion 13 and the reflection of light on the inner surface of the tubular portion 13. As the sensor 17, any sensor such as an ultrasonic sensor or a contact type sensor may be used.

The shape measuring device 11 of the present embodiment further includes a position adjusting mechanism for adjusting the position of the sensor 17. The position adjusting mechanism of the shape measuring device 11 is composed of a first position adjusting mechanism, a second position adjusting mechanism, and a third position adjusting mechanism. The first position adjusting mechanism adjusts the position of the sensor 17 in the first direction D1 (vertical direction) along the axial direction of the rotation axis AR of the rotation support mechanism 16. The first position adjusting mechanism sets a plurality of different points as measurement positions in the first direction D1 (vertical direction), and enables shape measurement of the tubular portion 13 at each measurement position.

The second position adjusting mechanism adjusts the position of the sensor 17 along the second direction D2 (horizontal direction) orthogonal to the axial direction of the rotation axis AR of the rotation support mechanism 16. The second position adjusting mechanism can set the distance between the sensor 17 and the constricted portion 13a to a distance suitable for the measurement when measuring the shape of the constricted portion 13a of the article 12, for example. Further, the second position adjusting mechanism can set the distance between the sensor 17 and the tubular portion 13 to a distance suitable for measurement with respect to the articles 12 having different outer diameters of the tubular portion 13. Further, the second position adjusting mechanism of the present embodiment is configured to be able to move the sensor 17 to a position facing the bottom 14 of the article 12.

The third position adjusting mechanism adjusts the angular position of the sensor 17 so as to have an angle suitable for measurement with respect to the outer surface of the article 12. More specifically, the third position adjusting mechanism adjusts the angle θ1 of the sensor 17 so that the light emitted from the sensor 17 is orthogonal to the outer surface of the article 12, for example. The third position adjusting mechanism rotates the sensor 17 in the third direction D3, which is an axis orthogonal to both the first direction D1 and the second direction D2.

The first position adjusting mechanism, the second position adjusting mechanism, and the third position adjusting mechanism include a drive unit such as a servomotor (not shown). The first position adjusting mechanism, the second position adjusting mechanism, and the third position adjusting mechanism are composed of, for example, a multi-axis robot or an articulated robot. The drive unit of each position adjustment mechanism is controlled by a control unit (not shown). More specifically, the control unit of the shape measuring device 11 includes a storage unit that stores the measurement program. The control unit automatically controls the shape measurement of the article 12 based on preset measurement position information, rotation angle information of the rotation drive unit 19 in the rotation support mechanism 16, and the like. The storage unit of the control unit may store a plurality of measurement position information set for each article having a different outer shape. The measurement position of the tubular portion 13 of the article 12 can be set, for example, with the contact position where the contact portion 20 of the rotation support mechanism 16 abuts on the inner surface of the bottom portion 14 of the article 12 as a reference position. That is, the control unit can be configured to control the sensor 17 based on the measurement position information including the distance between the contact position and the measurement position.

As shown in FIGS. 1 and 2, the shape measuring device 11 of the present embodiment further includes a positioning member 21 that comes into contact with the outer peripheral surface of the tubular portion 13 of the article 12 and positions the tubular portion 13. The positioning member 21 guides the rotation of the tubular portion 13 of the article 12. The positioning member 21 includes a first positioning member 21a and a second positioning member 21b arranged apart from each other so as to sandwich the tubular portion 13 of the article 12. In FIG. 2, a part of the shape measuring device 11 shown in FIG. 1 is omitted.

As shown by arrows in FIG. 2, the first positioning member 21a and the second positioning member 21b are provided so as to be detachable from the tubular portion 13 of the article 12. The first positioning member 21a and the second positioning member 21b of the present embodiment are composed of rollers that can rotate by a rotation axis parallel to the rotation axis AR of the rotation support mechanism 16, but have been changed to a non-rotatable configuration. May be good. Examples of the material of the first positioning member 21a and the second positioning member 21b include a metal material, a resin material, and a rubber material.

As shown in FIG. 2, a straight line L1 connecting the rotation center P0 of the rotation support mechanism 16 and the contact point P1 in which the first positioning member 21a is in contact with the tubular portion 13 of the article 12 and the rotation center of the rotation support mechanism 16 in a plan view. The angle θ2 formed by the straight line L2 connecting P0 and the contact point P2 in which the second positioning member 21b is in contact with the tubular portion 13 is set in a range of more than 90 ° and less than 270 °. The angle θ2 is preferably in the range of 120 ° or more and 240 ° or less.

Next, the shape measurement method will be described.
The shape measuring method is a method of measuring the shape of the tubular portion 13 in the article 12 in the circumferential direction. The shape measurement method includes a rotation step of rotating the article 12 in the circumferential direction of the tubular portion 13 by the rotation support mechanism 16 described above, and a measurement step of measuring the shape of the tubular portion 13 of the article 12.

In order to perform the rotation step of the shape measuring method, first, the article 12 is supported by the support portion 18 of the rotation support mechanism 16. At this time, in the present embodiment, the center of the bottom portion 14 of the article 12 is aligned with the contact portion 20 of the shape measuring device 11. The center of the bottom 14 of the article 12 can be identified, for example, by leaving a trace in the center of the bottom 14 using a mold for molding the article 12. Further, in the present embodiment, the first positioning member 21a and the second positioning member 21b are brought into contact with the outer peripheral surface of the tubular portion 13 of the article 12. In the rotation step, the article 12 can be rotated while the tubular portion 13 of the article 12 is guided by the first positioning member 21a and the second positioning member 21b.

In the measurement step, the entire circumference shape of the tubular portion 13 of the article 12 is measured while rotating the article 12 by the rotation step using the sensor 17 arranged at a predetermined position. In the measurement step, the shape may be partially measured in the circumferential direction of the tubular portion 13 instead of the entire circumference of the tubular portion 13 of the article 12. In this case, in the rotation step, the measurement step may be performed while rotating the article 12, or the measurement step may be performed with the article 12 stopped after the article 12 is rotated to a predetermined position.

In the measurement step of the present embodiment, the shape of the tubular portion 13 of the article 12 is measured at a plurality of locations along the axial direction of the rotation axis AR. In this case, the sensor 17 is moved to a predetermined measurement position along the axial direction of the rotation axis AR of the rotation support mechanism 16. For example, in the measurement step, when measuring the shape of the constricted portion 13a after measuring the shape of the constricted portion 13a in the tubular portion 13 of the article 12, the sensor 17 is set in the second direction D2 (horizontal direction). By moving along the sensor 17, the sensor 17 is brought closer to the constricted portion 13a, and the angle θ1 of the sensor 17 is adjusted so as to face the outer surface of the constricted portion 13a. In the measurement step, the shape of the bottom portion 14 of the article 12 can be measured by changing the position of the sensor 17 to a position facing the bottom portion 14 of the article 12 as shown by the alternate long and short dash line in FIG.

According to the embodiment described in detail above, the following effects are exhibited.
(1) The shape measuring method is a method of measuring the shape of the tubular portion 13 in the circumferential direction of the article 12 having the tubular portion 13. The shape measurement method includes a rotation step of rotating the article 12 in the circumferential direction of the tubular portion 13 by the rotation support mechanism 16 and a sensor 17 arranged outside the tubular portion 13 of the article 12 to determine the shape of the tubular portion 13. It has a measurement process to measure. The rotation support mechanism 16 used in the rotation step of the shape measurement method has a support portion 18 that supports the inside of the tubular portion 13 of the article 12, and a rotation drive portion 19 that rotationally drives the support portion 18.

According to this method, since the rotation support mechanism 16 used in the rotation step has a support portion 18 that supports the inside of the tubular portion 13 of the article 12, the support portion 18 of the rotation support mechanism 16 is the article 12. It is possible to avoid protruding to the outside. Thereby, for example, it is possible to prevent the shape measuring device from becoming large in size. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be suitably measured.

(2) The article 12 has a bottom portion 14 that closes one end of the tubular portion 13. In the rotation step of the article 12 measuring method, the article 12 is rotated in an inverted posture in which the opening at the other end of the tubular portion 13 of the article 12 is directed downward.

In this case, the article 12 can be rotated in a more stable state in the rotation step. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be measured more preferably. For example, it becomes easy to improve the accuracy in shape measurement of the article 12.

(3) The rotation support mechanism 16 used in the rotation step of the shape measurement method is projected from the support portion 18 so as to be coaxial with the rotation axis AR of the support portion 18, and is in contact with the inner surface of the bottom portion 14 of the article 12. It has a contact portion 20.

In this case, by supporting the article 12 on the support portion 18 so that the center of the bottom portion 14 of the article 12 and the abutting portion 20 of the rotation support mechanism 16 are aligned, it becomes easy to align the rotation reference of the article 12. Further, the vertical position of the article 12 can be aligned by the contact portion 20 of the rotation support mechanism 16. Further, by setting the contact position where the contact portion 20 of the rotation support mechanism 16 abuts on the inner surface of the article 12 as a reference position, the measurement position of the tubular portion 13 of the article 12 can be easily set. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be measured more preferably.

(4) The tubular portion 13 of the article 12 has a constricted portion 13a having a diameter smaller than that of the opening of the tubular portion 13. The support portion 18 of the rotation support mechanism 16 used in the shape measurement method has a tapered surface 18a having a shape whose outer diameter changes along the rotation axis AR of the rotation support mechanism 16. In the rotation step of the shape measuring method, the constricted portion 13a of the article 12 is supported by the tapered surface 18a of the supporting portion 18.

In this case, the constricted portion 13a of the article 12 can be stably supported by the tapered surface 18a in the support portion 18 of the rotation support mechanism 16. Thereby, in the rotation step, the article 12 having the constricted portion 13a can be rotated in a more stable state. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be measured more preferably. For example, it becomes easy to improve the accuracy in shape measurement of the article 12.

(5) In the rotation step of the shape measuring method, the rotation of the tubular portion 13 is guided by the positioning member 21 that contacts the outer peripheral surface of the tubular portion 13 of the article 12 and positions the tubular portion 13.
In this case, the article 12 can be rotated in a more stable state in the rotation step. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be measured more preferably. For example, it becomes easy to improve the accuracy in shape measurement of the article 12.

(6) In the rotation step of the shape measuring method, the positioning member 21 includes a first positioning member 21a and a second positioning member 21b arranged apart from each other so as to sandwich the tubular portion 13 of the article 12.

In this case, the article 12 can be rotated in a more stable state in the rotation step. Therefore, the shape of the tubular portion 13 of the article 12 in the circumferential direction can be measured more preferably. For example, the accuracy in shape measurement of the article 12 can be further improved.

(7) The sensor 17 used in the measurement process of the shape measuring method is configured to be movable at least along the axial direction of the rotation axis AR of the rotation support mechanism 16. In the measurement step, the shape of the tubular portion 13 of the article 12 is measured at a plurality of locations along the axial direction of the rotation axis AR.

In this case, it becomes easy to cope with the inspection of the article 12 which requires higher shape accuracy.
(8) The article 12 is a glass article for a thermos bottle having a bottom portion 14 that closes one end of the tubular portion 13 and having a curved surface in which the outer surface of the bottom portion 14 is convex outward.

When such a glass article for a thermos bottle is to be rotated on a turntable as in the conventional case, it is difficult to match the rotation reference. That is, since the outer surface of the bottom portion 14 of the article 12 is a curved surface, when the outer surface of the bottom portion 14 is supported on the turntable, the tubular portion 13 tends to be in an inclined posture with respect to the rotation axis of the turntable. Further, the opening of the tubular portion 13 in the article 12 does not necessarily form a surface perpendicular to the axial direction of the tubular portion 13, and when such an opening is supported on a turntable. Even if there is, the tubular portion 13 tends to be in an inclined posture with respect to the rotation axis of the turntable.

The rotation support mechanism 16 used in the shape measurement method of the present embodiment has a support portion 18 that supports the inside of the tubular portion 13 of the article 12. In this case, the axial direction of the tubular portion 13 can be aligned with the rotation axis AR in the rotation drive unit 19 of the rotation support mechanism 16 without depending on the shape of the bottom portion 14 or the opening of the article 12. Therefore, the shape measuring method of the present embodiment can be suitably used as the shape measuring method of the glass article for the thermos described above.

(9) The shape measuring device 11 is arranged outside the rotary support mechanism 16 for rotating the article 12 in the circumferential direction of the tubular portion 13 and the tubular portion 13 of the article 12, and measures the shape of the tubular portion 13. The sensor 17 is provided. The rotation support mechanism 16 has a support portion 18 that supports the inside of the tubular portion 13 of the article 12, and a rotation drive portion 19 that rotationally drives the support portion 18. According to this configuration, the same effect as that described in the above column (1) can be obtained.

(Change example)
The above embodiment may be changed as follows.
-In the measurement process of the shape measurement method, the measurement position along the axial direction of the rotation axis AR may be one place. In this case, the sensor 17 of the shape measuring device 11 may be fixed in advance at a predetermined position. That is, in the shape measuring device 11, the position adjusting mechanism of the sensor 17 can be omitted.

-A plurality of sensors 17 may be used in the shape measurement method.
-In the shape measuring method, the shape of only the constricted portion 13a of the article 12 may be measured, or the shape of only the tubular portion 13 other than the constricted portion 13a may be measured.

-In the shape measuring method, the rotation step may be performed without using at least one of the first positioning member 21a and the second positioning member 21b.
The support portion 18 of the rotation support mechanism 16 used in the shape measurement method is not limited to the shape having the tapered surface 18a described above, and can be appropriately changed to a shape capable of supporting the inside of the tubular portion 13 of the article 12.

-The contact portion 20 of the rotation support mechanism 16 used in the shape measurement method may be omitted.
-As shown in FIG. 3, in the rotation step of the shape measuring method, the article 12 may be rotated in an upright posture with the opening of the tubular portion 13 of the article 12 facing upward. In this case, the support portion 18 of the rotation support mechanism 16 is configured to be press-fitted into the tubular portion 13 of the article 12, so that the article 12 can be prevented from falling off from the support portion 18. The support portion 18 of the rotation support mechanism 16 preferably has a tapered surface having a shape whose outer diameter changes along the rotation axis AR of the rotation support mechanism 16. More specifically, the support portion 18 has a tapered surface whose tip side is reduced in diameter at which insertion is started with respect to the opening of the article 12, so that the support portion 18 can be easily press-fitted into the tubular portion 13 of the article 12. It becomes.

-In the shape measurement method, the axial direction of the rotation axis AR in the rotation support mechanism 16 is not limited to the vertical direction (vertical direction), but may be arranged in a horizontal direction or a direction inclined with respect to the horizontal direction. In this case, the position of the sensor 17 used in the measurement process may be changed according to the arrangement of the tubular portion 13 of the article 12.

-The shape measurement method can also be applied to an article having no constricted portion 13a. The cross-sectional shape of the tubular portion 13 of the article 12 is circular, but may be elliptical or polygonal, for example.

-The shape measurement method can also be applied to, for example, shape measurement of an article having a flat outer surface of the bottom and shape measurement of an article having an inwardly convex outer surface of the bottom.
-The shape measurement method can also be applied to an article having openings at both ends, that is, an article composed of only the tubular portion 13.

-The shape measurement method can also be applied to the shape measurement of glass articles used for purposes other than thermos bottles.
-The shape measurement method can also be applied to the shape measurement of an article made of a material other than glass.

11 ... Shape measuring device, 12 ... Article, 13 ... Cylindrical part, 13a ... Constricted part, 14 ... Bottom, 16 ... Rotational support mechanism, 17 ... Sensor, 18 ... Support part, 18a ... Tapered surface, 19 ... Rotational drive part , 20 ... contact portion, 21 ... positioning member, 21a ... first positioning member, 21b ... second positioning member, AR ... rotating shaft.

Claims (8)

A shape measuring method for measuring the shape of the tubular portion in the circumferential direction of an article having a tubular portion.
A rotation step of rotating the article in the circumferential direction by a rotation support mechanism having a support portion for supporting the inside of the tubular portion of the article and a rotation drive portion for rotationally driving the support portion.
It is provided with a measurement step of measuring the shape of the tubular portion by a sensor arranged outside the tubular portion of the article.
The article has a bottom that closes one end of the tubular portion.
Wherein a rotary process, shape measurement method you characterized by rotating the article the opening of the other end of the tubular portion in an inverted posture directed downward. Said rotary support mechanism according to claim 1, characterized in that it comprises a abutment portion abutting the inner surface of the bottom portion of the article along with the is projected from the support portion so as to be coaxial with the axis of rotation of the supporting part The shape measurement method described in. A shape measuring method for measuring the shape of the tubular portion in the circumferential direction of an article having a tubular portion.
A rotation step of rotating the article in the circumferential direction by a rotation support mechanism having a support portion for supporting the inside of the tubular portion of the article and a rotation drive portion for rotationally driving the support portion.
It is provided with a measurement step of measuring the shape of the tubular portion by a sensor arranged outside the tubular portion of the article.
The tubular portion of the article has a constricted portion having a diameter smaller than the opening of the tubular portion.
The support portion of the rotation support mechanism has a tapered surface having a shape whose outer diameter changes along the rotation axis of the rotation support mechanism.
Wherein a rotary process, shape measurement method you characterized by supporting the constricted portion in the tapered surface of the support portion. A shape measuring method for measuring the shape of the tubular portion in the circumferential direction of an article having a tubular portion.
A rotation step of rotating the article in the circumferential direction by a rotation support mechanism having a support portion for supporting the inside of the tubular portion of the article and a rotation drive portion for rotationally driving the support portion.
It is provided with a measurement step of measuring the shape of the tubular portion by a sensor arranged outside the tubular portion of the article.
Wherein a rotary process, shape measurement method you characterized by guiding the rotation of the tubular portion by a positioning member for positioning the tubular portion with contact with the outer peripheral surface of the tubular portion of the article. The shape measuring method according to claim 4 , wherein the positioning member includes a pair arranged so as to sandwich the tubular portion. A shape measuring method for measuring the shape of the tubular portion in the circumferential direction of an article having a tubular portion.
A rotation step of rotating the article in the circumferential direction by a rotation support mechanism having a support portion for supporting the inside of the tubular portion of the article and a rotation drive portion for rotationally driving the support portion.
It is provided with a measurement step of measuring the shape of the tubular portion by a sensor arranged outside the tubular portion of the article.
The article, which has a bottom closing one end of the tubular portion, shape measuring how to characterized in that the outer surface of the bottom portion is a glass article for thermos is a curved surface that is convex outwardly .. The sensor is configured to be movable at least along the axial direction of the rotation axis of the rotation support mechanism.
The shape measuring method according to any one of claims 1 to 6, wherein in the measuring step, the shape of the tubular portion is measured at a plurality of locations along the axial direction. A shape measuring device that measures the shape of the tubular portion in the circumferential direction of an article having a tubular portion.
A rotary support mechanism having a support portion for supporting the inside of the tubular portion of the article and a rotation drive portion for rotationally driving the support portion, and rotating the article in the circumferential direction of the tubular portion.
It is provided with a sensor that is arranged outside the tubular portion of the article and measures the shape of the tubular portion .
The article has a bottom that closes one end of the tubular portion.
The rotation support mechanism is a shape measuring device characterized in that the article is rotated in an inverted posture in which the opening at the other end of the tubular portion is directed downward.

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