JP2016130661A - Measurement apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve measurement accuracy by preventing one-side contact between measurement contact parts side in contact with a measuring object, and measurement reference parts side in contact with reference plane of the measuring object.SOLUTION: A measurement apparatus 100 according to the present invention includes: a plurality of measurement reference parts 101 coming into contact with a reference plane 2a of a measuring object 2; a plurality of measurement contact parts 102A and 102B coming into contact with measuring parts 8a and 9a of the measuring object; and measuring instruments 103A and 103B for measuring a distance between the reference plane and the measuring parts, with the measurement reference parts and the measurement contact parts in contact with the reference plane and the measuring parts respectively. The measurement reference parts and the contact parts include: stationary parts 112, 141A and 141B; and movable parts 113, 143A and 143B that are movable with respect to the stationary parts and including contact surfaces 113a, 143Aa, and 143Ba coming into contact with the reference plane and the measuring parts.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a measuring device.

In the assembly process of the transmission device, a transmission case such as an input shaft or a counter shaft having gears and bearing members is incorporated in the clutch housing, and then the transmission case is assembled with the clutch housing. At this time, on the clutch housing side, the height from the mating surface that becomes the reference surface with the transmission case to the bearing member attached to the transmission is measured, and on the mission case side, the bearing is measured from the mating surface that becomes the reference surface with the clutch housing. The depth to the end surface of the attachment part for attaching a member is measured. In other words, the mating surface of the transmission case and the mating surface of the clutch housing are used as a reference surface, the measurement reference portion of the measuring device is brought into contact with this reference surface, and the measurement target bearing member and the end surface of the mounting portion are measured. The contact part is brought into contact, and the distance from the reference surface to the end face of the bearing member or the mounting part is measured. Then, after selecting a shim that is an optimum adjustment tool that matches the difference in measurement dimensions between the two, the shim is assembled into the end face of the mounting portion of the transmission case, and then combined with the clutch housing.
When measuring the dimensional error of a plurality of objects to be assembled with a measuring device before mounting the shim, it is desirable to measure as accurately as possible. However, there is contact between the measurement contact portion of the measurement device and the measurement object. Patent Document 1 discloses a configuration in which a measurement contact portion that makes contact with a measurement object is movable, and the measurement contact portion side is adapted to the measurement object to prevent one-side contact.

Japanese Patent No. 3454463

Making the measurement contact portion that contacts the measurement object movable as in Patent Document 1 is one technique for reducing measurement errors, but the measurement reference portion also on the reference plane side that is a reference for measurement. Therefore, in order to improve the measurement accuracy, it is necessary to improve the measurement reference section.
An object of the present invention is to improve the measurement accuracy by preventing the contact between the measurement contact portion that contacts the measurement object and the measurement reference portion that contacts the reference surface of the measurement object. .

  In order to achieve the above object, a measurement device according to the present invention includes a plurality of measurement reference units that can contact a reference surface of a measurement object and a plurality of measurement contact units that can contact a measurement location of the measurement object. And a measurement tool for measuring the distance between the reference surface and the measurement location in a state where the measurement reference portion and the measurement contact portion are in contact with the reference surface and the measurement location, respectively. Is characterized in that it has a fixed part and a movable part that is movable with respect to the fixed part via a sphere and has a reference surface and a contact surface that contacts the measurement location.

  According to the present invention, the measurement reference portion and the measurement contact portion include a fixed portion and a contact surface that is movable with respect to the fixed portion via a sphere, and contacts the reference surface and the measurement location. Since each has a movable part, it prevents contact on the measurement contact part side that makes contact with the measurement object and the measurement reference part side that makes contact with the reference surface of the measurement object, thereby improving measurement accuracy. Can do.

The figure which shows schematic structure of a transmission apparatus. The front view explaining the structure of the measuring device which concerns on 1st Embodiment which concerns on this invention. The side view explaining the structure of the measuring device which concerns on 1st Embodiment based on this invention. Sectional drawing explaining the structure of the measurement contact part of the measuring device which concerns on 1st Embodiment. The top view explaining the positional relationship of the measurement reference | standard part and mating surface which concern on 1st Embodiment. It is a figure explaining the structure of the other end of the measurement reference | standard part which concerns on 1st Embodiment, (a) is an expanded sectional view which shows the state of the other end of the measurement reference | standard part when it exists in a stand-by position, (b) is The expanded sectional view which shows the state of the other end of the measurement reference | standard part when it exists in a measurement position. The figure which shows the structure of the injection nozzle provided in the measurement reference | standard part of the measuring device which concerns on 1st Embodiment, and air piping. It is a figure explaining the structure of the other end of the measurement contact part which concerns on 1st Embodiment, (a) is an expanded sectional view which shows the state of the other end of the measurement contact part when it exists in a stand-by position, (b) ) Is an enlarged cross-sectional view showing the state of the other end of the measurement contact portion when it is in the measurement position. It is a figure explaining the structure of the pressurization means with which the measuring apparatus which concerns on 1st Embodiment is equipped, (a) is an expanded sectional view which shows a state when it exists in a standby position, (b) is in a measurement position. The expanded sectional view which shows the state of time. The block diagram which shows the structure of the control system of the measuring device which concerns on 1st Embodiment. A front view explaining composition of a measuring device concerning a 2nd embodiment concerning the present invention. A side view explaining composition of a measuring device concerning a 2nd embodiment concerning the present invention. Sectional drawing explaining the structure of the measurement reference | standard part and measurement contact part of the measuring device which concern on 2nd Embodiment. The top view explaining the positional relationship of the measurement reference | standard part and mating surface which concern on 2nd Embodiment. It is a figure explaining the structure of the other end of the measurement reference | standard part which concerns on 2nd Embodiment, (a) is an expanded sectional view which shows the state of the other end of the measurement reference | standard part in a standby position, (b) is The expanded sectional view which shows the state of the other end of the measurement reference | standard part when it exists in a measurement position. The figure which shows the structure of the injection nozzle provided in the measurement reference | standard part of the measuring device which concerns on 2nd Embodiment, and air piping. It is a figure explaining the structure of the other end of the measurement contact part which concerns on 2nd Embodiment, (a) is an expanded sectional view which shows the state of the other end of the measurement contact part when it exists in a stand-by position, (b) ) Is an enlarged cross-sectional view showing the state of the other end of the measurement contact portion when it is in the measurement position. It is a figure explaining the structure of the pressurization means with which the measuring apparatus which concerns on 2nd Embodiment is equipped, (a) is an expanded sectional view which shows a state when it exists in a stand-by position, (b) is in a measurement position. The expanded sectional view which shows the state of time. The block diagram which shows the structure of the control system of the measuring device which concerns on 2nd Embodiment.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same member or a member having the same function is denoted by the same reference numeral, and redundant description is appropriately omitted. In view of ease of viewing the drawing, the structural requirements may be partially omitted.
The assembly process of the transmission device 1 will be described with reference to FIG. The transmission device 1 includes a clutch housing 2 and a transmission case 3 as exterior products. The clutch housing 2 and the transmission case 3 are arranged to face each other. An input shaft 4 having a plurality of gears serving as a transmission and one end sides 4 a and 5 a of a counter shaft 5 are rotatably assembled to the clutch housing 2 via bearing members 6 and 7. The other end side 4b, 5b of the input shaft 4 and the counter shaft 5 is assembled to the transmission case 3 via bearing members 8 and 9 so as to be rotatable. Then, the mating surfaces 2a and 3a of the clutch housing 2 and the transmission case 3 are joined, and are integrated by fastening with a fastening member such as a bolt. The input shaft 4 and the counter shaft 5 are assembled so that the axes O1 and O2 thereof are perpendicular to the mating surface 2a.

  When the transmission apparatus 1 is assembled in this way, the rear end sides 4 b and 5 b of the input shaft 4 and the counter shaft 5 protrude from the mating surface 2 a of the clutch housing 2 in the axial direction. On the other hand, the mission housing 3 is inserted into the rear end sides 4 b and 5 b of the input shaft 4 and the counter shaft 5 from the axial direction, and the mating surface 3 a of the mission housing 3 is joined to the mating surface 2 a of the clutch housing 2. For this reason, in order to join the clutch housing 2 and the transmission housing 3 without gaps, the protruding amount of the input shaft 4 and the counter shaft 5 from the mating surface 2a of the clutch housing 2 (distance L1 to the bearing members 8 and 9). And the depth from the mating surface 3a of the transmission case 3 to the end surfaces 3b1, 3c1 of the mounting portions 3b, 3c for mounting and supporting the rear end sides 4b, 5b (bearing members 8, 9) of the input shaft 4 and the counter shaft 5 ( The distances L2) are preferably the same. However, in practice, the distance between the two may not be the same due to manufacturing errors of the clutch housing 2 and the transmission case 3 and assembly errors of the input shaft 4 and the counter shaft 5. For this reason, in order to fill this dimensional error, shims 10 and 10 serving as an adjustment tool having a thickness corresponding to the dimensional error are interposed between the mounting portions 3b and 3c of the transmission case 3 and the bearing members 8 and 9. The distance between the two is adjusted. In this embodiment, since a dimensional error in units of 1/100 mm is assumed, a plurality of shims 10 and 10 having different thicknesses in units of 1/100 mm are prepared.

  The measuring device according to the present invention includes a distance L1 from the mating surface 2a of the clutch housing 2 to the bearing members 8 and 9 of the countershaft 5, and the input shaft 4 and the countershaft from the mating surface 3a of the transmission case 3. The distance L2 to the end surfaces 3b1 and 3c1 of the mounting portions 3b and 3c for mounting and supporting the five bearing members 8 and 9 is individually measured in units of 1/100 mm. A measuring device that measures the distance L1 on the clutch housing 2 side is denoted by reference numeral 100, and a measuring device that measures the distance L2 on the mission case 3 side is denoted by reference numeral 200.

(First embodiment)
A measuring apparatus 100 shown in FIGS. 2 to 4 measures the distance L1 described in FIG. In the measuring device 100, the reference surface of the measurement object is the mating surface 2a of the clutch housing 2, and the measurement points of the measurement object are the end surfaces 8a and 9a of the bearing members 8 and 9. In addition, in this embodiment, the position of the end surfaces 8a and 9a of the bearing members 8 and 9 is arrange | positioned so that it may be located on the same plane.
The measuring device 100 includes a plurality of measurement reference portions 101 (A), 101 (B), and 101 (C) that can come into contact with the mating surface 2 a, and end surfaces 8 a of the bearing members 8 and 9 of the input shaft 4 and the countershaft 5. , 9a, a plurality of measurement contact portions 102A, 102B, measurement reference portions 101 (A), 101 (B), 101 (C), and measurement contact portions 102A, 102B are mating surfaces 2a and end surfaces. Measuring tools 103A and 103B for measuring a distance L1 between the mating surface 2a and the end surfaces 8a and 9a in a state of being in contact with 8a and 9a, respectively. Since the measurement reference units 101 (A), 101 (B), and 101 (C) have basically the same configuration, they will be described below as the measurement reference unit 101 and alphabets when describing the measurement reference unit of characteristics. A to C will be appropriately described.

The measuring device 100 includes a horizontal mounting portion 109 for setting the clutch housing 2 at a lower portion thereof. The mounting portion 109 is provided with a fixing tool (not shown) for fixing the clutch housing 2. The clutch housing 2 to which the input shaft 4 and the counter shaft 5 are assembled is fixed on the mounting portion 109 by the fixing tool so that the mating surface 2a is positioned upward and becomes horizontal.
The plurality of measurement reference portions 101 have a cylindrical shape made of metal and extend in the axial direction of the input shaft 4 and the counter shaft 5, respectively. The plurality of measurement reference portions 101 are fixed so that one end 101a protrudes downward from the lower surface 104a vertically to the lower surface 104a of the reference plate 104 disposed horizontally above the placement portion 109. Has been.

  As shown in FIG. 3, the reference plate 104 is mounted on a slide frame 106 that is supported on the main body base 105 of the measuring device 100 so as to be movable in the up-and-down direction indicated by the arrow Z, and is integrated with the slide frame 106. It can be moved in the up-and-down direction Z. The slide frame 106 has an L-shaped side surface, and a lower side portion 106 a is slidably supported by the main body base portion 105. A movable rod 108 of an actuator 107 that is moved in the ascending / descending direction Z by air pressure is fixed to a long side portion 106b perpendicular to the lower side portion 106a. In the present embodiment, the axial direction of the input shaft 4 and the counter shaft 5 in the measuring device 100 is the same as the up-and-down direction Z.

As shown in FIG. 2, the main body base 105 is provided with sensors 181 and 182 for position detection that are arranged at intervals in the up-and-down direction Z. The upper sensor 181 detects the standby positions of the plurality of measurement reference units 101 and the measurement contact units 102A and 102B, and the lower sensor 182 includes the plurality of measurement reference units 101 and the measurement contact units. The measurement positions of 102A and 102B are detected.
Floating portions 110 (A to C) serving as contact portions that come into contact with the mating surface 2a are provided at the other ends 101b of the plurality of measurement reference portions 101, respectively. Since the configuration of the floating part 110 (A to C) is the same, (A to C) is omitted. As shown in FIG. 6A, the floating unit 110 is a metal that can move via the metal sphere 112 with respect to the end surface 111 of the other end 101 b of each measurement reference unit 101 serving as a fixed unit and the end surface 111. It has a movable part 113 made of metal. The end surface 111 and the opposed surface 113b of the movable portion 113 are opposed to each other, and are integrated so that a gap S is formed between the opposed surfaces via the sphere 112. The lower surface 113a of each movable portion 113 forms a contact surface with the mating surface 2a. In the present embodiment, the plurality of measurement reference portions 101 are attached to the reference plate 104 so that the mating surface 2a and the lower surface 113a of the floating portion 110 face each other at different positions. In other words, in the present embodiment, as shown in FIG. 5, the plurality of measurement reference units 101 are arranged so as to be supported at three points with respect to the mating surface 2 a in plan view.

In the present embodiment, as shown by the two-dot chain line in FIG. 3, the reference plate 104 is raised, and the lower surfaces 113a of the plurality of measurement reference parts 101 are separated from the mating surface 2a as shown in FIG. The position where the current position is set as the standby position. In the present embodiment, the reference plate 104 descends as shown by solid lines in FIGS. 2 and 3, and the lower surfaces 113a of the plurality of measurement reference portions 101 come into contact with the mating surface 2a as shown in FIG. 6B. Let the position be the measurement position.
As shown in FIG. 6A and FIG. 6B, each floating portion 110 has an injection nozzle 130 (A˜) as an injection portion that injects air from the lower surface 113a of the movable portion 113 toward the mating surface 2a. C) is provided. Since the configuration of the injection nozzles 130 (A to C) is the same, (A to C) is omitted in FIG. An injection hole 113c communicating with each injection nozzle 130 is formed in the lower surface 113a, and the air injected from the injection nozzle 130 is injected toward the mating surface 2a.

As shown in FIG. 7, each injection nozzle 130 (A to C) is connected to a compressor 172 serving as an air supply source via an air pipe 171A, 171B, 171C, respectively. Pressure sensors 173A, 173B, and 173C are attached to the air pipes 171A, 171B, and 171C, respectively, so that the pressure in the pipe can be detected. The air pipes 171Aa, 171Ba, 171Ca between the pressure sensors 173A, 173B, 173C and the compressor 172 are provided with electronic on-off valves 174A, 174B, 174C, respectively. The three on-off valves 174A, 174B, 174C are It is an electromagnetic valve that controls opening and closing of each air pipe 171A in order to introduce and stop air to the three injection nozzles 130 (A to C).
The compressor 172 and the actuator 107 are connected via air pipes 175 and 176. The air pipes 175 and 176 are provided with electronic on-off valves 177 and 178 for controlling opening and closing of the air pipes 175 and 176 in order to introduce and stop air to the actuator 107.

As shown in FIGS. 2 to 4, the two measurement contact portions 102 </ b> A and 102 </ b> B extend in the axial direction of the input shaft 4 and the counter shaft 5, respectively, and pass through the reference plate 104 in the up-and-down direction Z. Yes. As shown in FIG. 4, the ends 102 </ b> Aa and 102 </ b> Ba of the measurement contact portions 102 </ b> A and 102 </ b> B positioned on the upper part of the reference plate 104 have an axial shape. The shaft-like ends 102Aa and 102Ba are slidably supported in the ascending / descending direction (axial direction) Z by sleeves 120A and 120B having a sliding function fixed to the reference plate 104, respectively. Tubular outer cases 121A and 121B are attached to the outside of the sleeves 120A and 120B, respectively. End surfaces 102Ac and 102Bc of the respective one ends 102Aa and 102Ba protrude above the sleeves 120A and 120B and the outer cases 121A and 121B, respectively. The detection units 103Aa and 103Ba of the measurement units 103A and 103B are in contact with the end faces 102Ac and 102Bc, respectively.
Insertion portions 122A and 122B for inserting the other ends 4b and 5b of the input shaft 4 and the counter shaft 5 are formed at the other end 102b of the measurement contact portion 102 located below the reference plate 104, respectively. . Each of the insertion portions 122A and 122B incorporates conical members 124A and 124B as center position members biased downward by springs 123A and 123B as biasing means. Each insertion part 122A, 122B is for preventing the axis line fall of the input shaft 4 and the counter shaft 5 at the time of measurement. The conical members 124A and 124B serve as shaft jigs for allowing the input shaft 4 and the counter shaft 5 to enter the holes formed at the centers of the end faces 4d and 5d (see FIG. 2) to keep the axis center vertical. . The insertion portions 122A and 122B and the conical members 124A and 124B are formed so that their center lines are located on the same axis. The conical members 124A and 124B are supported so as to be slidable in the ascending / descending direction (axial direction) Z via cylindrical bushes 126A and 126B with respect to the insertion portions 122A and 122B.

Floating portions 140A and 140B serving as contact portions that contact the end surfaces 8a and 9a of the bearing members 8 and 9 of the input shaft 4 and the countershaft 5 are provided at the other ends 102Ab and 102Bb of the plurality of measurement contact portions 102A and 102B. It has been. As shown in FIGS. 8A and 8B, the floating portions 140A and 140B are connected to the end portions 141A and 141B of the other ends 102Ab and 102Bb of the measurement contact portions 102A and 102B, which are fixed portions, Metal movable parts 143A and 143B that are movable with respect to the parts 141A and 141B are provided. The end portions 141A and 141B and the movable portions 143A and 143B are opposed to each other. The end portions 141A and 141B include hemispherical curved surfaces 141Aa and 141Ba and mounting flange surfaces 141Ab and 141Bb formed around the curved surfaces 141Aa and 141Ba.
The movable parts 143A and 143B include hemispherical curved surfaces 144Aa and 141Ba along the curved surfaces 141Aa and 141Ba, and mounting flange surfaces 144Ab and 144Bb facing the mounting flange surfaces 141Ab and 141Bb. The movable portions 143A and 143B are formed by a plurality of bolts 145A and 145B, each of which has the mounting flange surfaces 144Ab and 144Bb and the mounting flange surfaces 141Ab and 141Bb as fastening members in a state where the curved surfaces 144Aa and 144Ba and the curved surfaces 141Aa and 141Ba are in contact with each other. By being fastened and fixed, it is integrated with the other end 102 b of the measurement contact portion 102. When the movable portions 143A and 143B are integrated with the other ends 102Ab and 102Bb of the measurement contact portions 102A and 102B, a gap S1 is formed between the mounting flange surfaces 144Ab and 144Bb and the mounting flange surfaces 141b and 141Bb. It is formed to be. The lower surface 143a of each movable portion 143 forms a contact surface with the end surfaces 8a, 9a of the bearing members 8, 9.

  In the present embodiment, the plurality of measurement contact portions 102A and 102B are attached to the reference plate 104 so that the mating surface 2a and the lower surface 143a of the floating portion 140 face each other at different positions. In the present embodiment, as indicated by the two-dot chain line in FIG. 3, the reference plate 104 is raised, and as shown in FIG. 8A, the lower surfaces 143 </ b> Aa and 143 </ b> Ba of the plurality of measurement contact portions 102 </ b> A and 102 </ b> B are A position separated from the end faces 8a and 9a of the members 8 and 9 is defined as a standby position. In this embodiment, the reference plate 104 descends as shown by the solid line in FIGS. 2 and 3, and the lower surfaces 143Aa and 143Ba of the plurality of measurement contact portions 102A and 102B are the bearings as shown in FIG. 8B. A position that contacts the end faces 8a and 9a of the members 8 and 9 is defined as a measurement position.

The lower surfaces 113a of the plurality of measurement reference portions 101 and the lower surfaces 143Aa and 143Ba of the measurement contact portions 102A and 102B have different heights in the ascending / descending direction Z. The height difference L3 between them (see FIG. 3) is set equal to the distance L1 (see FIG. 2). That is, the plurality of measurement reference portions 101 and the measurement contact portions 102 occupy the measurement positions, and when the other ends 4b and 5b of the input shaft 4 and the counter shaft 5 are inserted into the insertion portions 122, the insertion portions The height at which the conical member 124 comes into contact with 122 is set.
As shown in FIG. 4, the measurement units 103A and 103B are configured such that the detection units 103Aa and 103Ba are supported so as to be movable back and forth in the up-and-down direction Z with respect to the main bodies 103Ab and 103Bb, and the detection units 103Aa and 103Ba are moved in the up-and-down direction Z. This is a well-known linear scale that detects movement with sensors housed in the main bodies 103Ab and 103Bb.
In the present embodiment, the reference values of the measurement units 103A and 103B occupy the measurement position and are set to 0 (zero) when the other ends 4b and 5b of the input shaft 4 and the counter shaft 5 are inserted into the respective insertion units 122. . In the measurement units 103A and 103B, addition (+) occurs when the detection units 103Aa and 103Ba move upward from the reference position, and subtraction (−) occurs when the detection units 103Aa and 103Ba move downward. Outputs from the measurement units 103A and 103B are input to the control unit 170 described later.
For example, when the distance L1 and the height difference L3 are set to 500 mm and this value is set to the reference value 0 (zero), when the detection units 103Aa and 103Ba move downward, the movement amount α1 becomes 500 mm-downward, and the detection unit 103Aa , 103Ba moves upward, the amount of movement α2 is 500 mm + upward.

As shown in FIG. 2, a pair of pressurizing means 160 that pressurizes the support plate 104 and supports the support plate 104 in a suspended manner is provided on the long side portion 106 b of the slide frame 106. Each pressurizing means 160 is located outside the measurement contact portions 102A and 102B and, as shown in FIG. 5, on the same straight line O3 in plan view as the measurement contact portions 102A and 102B. Is arranged to be located.
As shown in FIGS. 9A and 9B, each pressurizing means 160 is moved in the up-and-down direction Z with respect to the casing 161 fixed to the long side portion 106 b of the slide frame 106 and the casing 161. A pressure rod 162 that is supported, a coil spring 163 that urges the pressure rod 162 toward the reference plate 104, and a holder 165 that supports the tip 162a side of the pressure rod 162 on the reference plate 104, respectively. I have.

A floating head 166 is formed on the tip 162a side of each pressure rod 162, respectively. Each floating head 166 has a bottom surface 166a facing the top surface 104b of the reference plate 104 in a hemispherical shape. An inclined truncated cone portion 166b having a smaller diameter toward the upper side than the diameter of the bottom surface 166a is formed at a portion of the floating head 166 above the bottom surface 166a.
Each holder 165 is fixed to the reference plate 104. Each holder 165 is formed with an internal space 167 larger than the outer shape of the floating head 166. In each internal space 167, an inclined surface 167a that is parallel to the truncated cone portion 166b is formed at a portion facing the truncated cone portion 166b.
As shown in FIG. 9A, when the measurement reference portion 101 and the measurement contact portions 102A and 102B are in the standby position, each floating head 166 has its holder 165 positioned downward due to the weight on the reference plate 104 side. doing. Therefore, each floating head 166 is in a state in which the truncated cone portion 166b abuts on the inclined surface 167a and the bottom surface 166a is lifted from the upper surface 104b of the reference plate 104. The weight on the reference plate 104 side does not act on each floating head 166 when the measurement reference portion 101 and the measurement contact portions 102A and 102B are at the measurement positions. Therefore, as shown in FIG. 9B, each floating head 166 protrudes toward the upper surface 104b of the reference plate 104 by the action of the coil spring 163, so that the truncated cone portion 166b is in contact with the inclined surface 167a. Each is eliminated, and the upper surface 104 of the reference plate 104 is configured to be pressurized.
The center of each floating head 166 and the center of each holder 165 are arranged on the same axis. When the truncated cone portion 166b and the inclined surface 167a are in contact with each other, each floating head 166 is in contact with each holder 165. It is configured to be centered.

As shown in FIG. 10, the compressor 172, the pressure sensors 173A, 173B, 173C, the on-off valves 174A, 174B, 174C, the on-off valves 177, 178, the sensors 181, 182 and the measuring tools 103A, 103B are respectively connected to the control unit 170. Connected via signal line.
The control unit 170 includes a computer that controls the operation of the compressor 173 and the operation of the measuring device 100. When the measurement start switch 151 provided on the operation panel 150 of the measuring apparatus 100 is operated, the control unit 170 operates the compressor 172 to open the on-off valve 178 and lower the movable rod 108 of the actuator 107. The three measurement reference parts 101 and the two measurement contact parts 102A and 102B are moved toward the measurement position. When the sensor 182 detects the measurement position, the controller 170 is configured to close the on-off valve 178 and simultaneously open the on-off valves 174A, 174B, 174C to inject air from the injection nozzles 130.
When the measurement end switch 152 provided on the operation panel 150 of the measuring device 100 is operated, the control unit 170 operates the compressor 172 to open the on-off valve 177 to raise and lower the movable rod 108 of the actuator 107. The three measurement reference parts 101 and the measurement contact parts 102A and 102B are moved toward the standby position.
The control unit 170 is configured to stop the operation of the compressor 172 when the sensor 181 detects the standby position, and hold the three measurement reference units 101 and the measurement contact units 102A and 102B at the standby position. Yes.
As shown in FIGS. 6 (b) and 8 (b), the control unit 170 is configured so that each measurement reference portion 101 and measurement contact portions 102A and 102B are respectively connected to the mating surface 2a and the end surfaces 8a of the bearing members 8 and 9. When the pressure P detected by the pressure sensor 173 (A to C) is equal to or higher than a preset reference pressure P1 when the pressure is detected, the measuring tool 103 Start the measured value by. When the injection pressure from each injection nozzle 130, that is, the pressure P detected by the pressure sensor 173 (A to C) is less than the reference pressure P <b> 1 set in advance, the control unit 170 uses the measuring tools 103 </ b> A and 103 </ b> B. Stop measurement. Stopping the measurement here includes a mode in which data output from the measuring tools 103A and 103B is not used as a measurement value, or data output from each measuring tool 103 is not accepted.

According to the measurement apparatus 100 having such a configuration, when the measurement start switch 151 is operated by an operator, the three measurement reference parts 101 and the measurement contact parts 102A and 102B are moved from the standby position in FIGS. When moving toward the measurement position indicated by the solid line and the sensor 182 detects the measurement position, it stops at the measurement position. Then, the lower surface 113a of the movable portion 113 of the measurement reference unit 101 comes into contact with the mating surface 2a as shown in FIG. 6B, and the lower surface 143a of the measurement contact portion 102 as shown in FIG. 8B. The bottom surfaces 166a of the floating heads 166 of the pressurizing means 160 pressurize the reference plate 104 as shown in FIG. 9 (b) while contacting the end surfaces 8a and 9a of the bearing members 8 and 9.
At this time, the lower surface 113a of each measurement reference portion 101 that is in contact with the mating surface 2a in a pressurized state is the end surface of the other end 101b of each measurement reference portion 101 that is a fixed portion, as shown in FIG. 111 is provided so as to be movable through a sphere 112. For this reason, the contact with the mating surface 2a is prevented.
Further, the lower surfaces 143Aa and 143Ba of the measurement contact portions 102A and 102B that are in contact with the end surfaces 8a and 9a of the bearing members 8 and 9 in a pressurized state serve as fixed portions as shown in FIG. 8B. It is provided on movables 143A and 143B provided to be movable with respect to the curved surfaces 141Aa and 141Ba of the end surfaces 141A and 141B of the other end 102Ab and 102Bb of each measurement contact part. For this reason, even when the bearing members 8 and 9 are inclined, the movable portions 143A and 143B are moved in accordance with the inclination, and the one-side contact with the end surfaces 8a and 9a of the bearing members 8 and 9 is prevented.
That is, in this embodiment, since the floating part 110 and the floating part 140 are provided on both the mating surface 2a side, the reference side on the bearing members 8 and 9 side, and the measurement side, the measurement accuracy is improved as compared with the conventional configuration. Can do.

Since the floating part 110 of each measurement reference part 101 has the injection nozzles 130 for injecting air from the lower surface 113a of the movable part 113 toward the mating surface 2a, there is foreign matter such as chips on the mating surface 2a. Can be blown away by the air that is jetted. Further, when each measurement reference portion 101 and the measurement contact portions 102A and 102B occupy the measurement position, when the injection pressure P from each injection nozzle 130 is less than the preset reference pressure P1, Since measurement by the measuring tools 103A and 103B is stopped, erroneous measurement can be prevented.
That is, if foreign matter such as cutting powder is attached to the mating surface 2a, a gap is formed between the lower surface 113a of the floating portion 110 of the measurement reference unit 101 that is a three-point support portion and the mating surface 2a. The pressure detected by the pressure sensors 173A to 173C does not reach the reference pressure P1. Therefore, measurement is not started. On the other hand, since the mating surface 2a and the lower surface 113a are in close contact with each other when the lower surface 113a and the mating surface 2a of the floating portion 110 of the measurement reference unit 101 which is a three-point support unit are in close contact, there is no air leakage. The detection pressure increases. For this reason, when the pressure increase value becomes the preset reference pressure P1, measurement is started assuming that the lower surface 113a of the floating portion 110 does not float on the mating surface 2a. Therefore, erroneous measurement can be prevented.
Further, in the present embodiment, the center of the floating head 166 and the center of each holder 165 are arranged on the same axis, and in the contact state between the truncated cone portion 166b and the inclined surface 167a, Pressure means 160, 160 configured to center the floating head 166 is provided. For this reason, since it is possible to apply pressure uniformly to the reference plate 104 during measurement, the mating surface 2a and the lower surface 113a of the measurement reference unit 101 are stably provided. The end surfaces 8a and 9a of the bearing members 8 and 9 and the lower surfaces 143Aa and 143Ba of the measurement contact portions 102A and 102B are in contact with each other, so that contact with each other can be prevented and measurement accuracy can be improved.

(Second Embodiment)
The measuring device 200 shown in FIGS. 11 to 13 measures the distance L2. In the measuring apparatus 200, the reference surface of the measurement object is the mating surface 3a of the mission case 3, and the measurement location of the measurement object is the mounting portion of the mission case 3 that supports the end surfaces 6a, 7a of the bearing members 6, 7. 3b and 3c are end faces 3b1 and 3c1. In the present embodiment, the end surfaces 3b1 and 3c1 of the attachment portions 3b and 3c that support the end surfaces 6a and 7a are arranged so as to be located on the same plane.
The measuring apparatus 200 includes a plurality of measurement reference portions 201 (A), 201 (B), 201 (C) that can come into contact with the mating surface 3 a and a plurality of measurement contacts that can come into contact with the mounting surface 3 c of the mission case 3. The contact portions 202A, 202B, the measurement reference portions 201 (A), 201 (B), 201 (C), and the measurement contact portions 202A, 202B are provided on the mating surface 3a and the end surfaces 3b1, 3c1 of the attachment portions 3b, 3c, respectively. Measuring tools 203A and 203B that measure the distance L2 between the mating surface 3a and the end surfaces 3b1 and 3c1 in the state of contact are provided. Since the measurement reference units 201 (A), 201 (B), and 201 (C) have basically the same configuration, in the following description, the measurement reference unit 201 will be described and a specific measurement reference unit will be described. A description will be given with the letters A to C as appropriate.

The measuring apparatus 200 includes a horizontal placement unit 209 for setting the mission case 3 at the lower part thereof. The mounting portion 209 is provided with a fixing tool (not shown) for fixing the mission case 3. The mission case 3 is arranged on the mounting portion 209 by the fixture so that the mating surface 3a is positioned upward and is horizontal.
Each of the plurality of measurement reference parts 201 is fixed so that one end 201a protrudes downward from the lower face 204a vertically to the lower face 204a of the reference plate 204 disposed horizontally above the placement part 209. Has been.

  As shown in FIG. 12, the reference plate 204 is attached to a slide frame 206 that is supported on the main body base 205 of the measuring device 200 so as to be movable in the up-and-down direction Z, and is integrated with the slide frame 206 in the up-and-down direction Z. It is possible to move to. The slide frame 206 has an L-shaped side surface, and a lower side portion 206a thereof is slidably supported by the main body base portion 205. A movable rod 208 of an actuator 207 that is moved in the ascending / descending direction Z by air pressure is fixed to a long side portion 206b perpendicular to the lower side portion 206a. In the present embodiment, as shown in FIG. 11, sensors 281 and 282 for position detection are mounted on the main body base 205 at intervals in the ascending / descending direction Z. The upper sensor 281 detects the standby positions of the plurality of measurement reference parts 201 and the measurement contact parts 202A and 202B, and the lower sensor 282 includes the plurality of measurement reference parts 201 and the measurement contact parts. The measurement positions of 202A and 202B are detected.

  The other ends 201b of the plurality of measurement reference units 201 are each provided with a floating portion 210 serving as a contact portion that contacts the mating surface 3a. As shown in FIGS. 15A and 15B, each floating portion 210 includes an end surface 211 of the other end 201 b of each measurement reference portion 201 serving as a fixed portion, and a metal sphere 212 with respect to the end surface 211. Each has a movable part 213 made of metal that can be moved through. The end surface 211 and the opposing surface 213b of the movable part 213 are opposed to each other, and are integrated so that a gap S is formed between the opposing surfaces via the sphere 212. The lower surface 213a of each movable part 213 forms a contact surface with the mating surface 3a. In the present embodiment, the plurality of measurement reference parts 201 are attached to the reference plate 204 so that the mating surface 3a and the lower surface 213a of the floating part 210 face each other at different positions. In other words, in the present embodiment, as shown in FIG. 14, the plurality of measurement reference parts 201 are arranged so as to support three points with respect to the mating surface 3 a in a plan view.

In the present embodiment, the reference plate 204 rises as shown by the two-dot chain line in FIGS. 11 and 12, and the lower surfaces 213a of the plurality of measurement reference parts 201 are separated from the mating surface 3a as shown in FIG. The separated position is set as a standby position. In this embodiment, the reference plate 204 descends as shown by the solid line in FIG. 12, and the positions where the lower surfaces 213a of the plurality of measurement reference parts 201 come into contact with the mating surface 3a as shown in FIG. And
As shown in FIGS. 15A and 15B, each floating portion 210 has an injection nozzle 230 (A˜) as an injection portion that injects air from the lower surface 213 a of the movable portion 213 toward the mating surface 3 a. C) is provided. Since the configuration of the injection nozzles 230 (A to C) is the same, (A to C) is omitted in FIG. An injection hole 213c communicating with each injection nozzle 230 is formed in the lower surface 213a, and the air injected from the injection nozzle 230 is injected toward the mating surface 3a.

As shown in FIG. 16, each injection nozzle 230 is connected to a compressor 272 serving as an air supply source via an air pipe 271. Each injection nozzle 230 (A to C) is connected to a compressor 272 serving as an air supply source via air pipes 271A, 271B, and 271C, respectively. Pressure sensors 273A, 273B, and 273C are mounted on the air pipes 271A, 271B, and 271C, respectively, so that the pressure in the pipe can be detected. The air pipes 271Aa, 271Ba, 271Ca between the pressure sensors 273A, 273B, 273C and the compressor 272 are provided with electronic on-off valves 274A, 274B, 274C, respectively. The three on-off valves 274A, 274B, 274C are This is an electromagnetic valve that controls opening and closing of the air pipes 271A, 271B, and 271C in order to introduce and stop air to the three injection nozzles 230 (A to C).
The compressor 272 and the actuator 207 are connected via air pipes 275 and 276. The air pipes 275 and 276 are provided with electronic on-off valves 277 and 278 for controlling opening and closing of the air pipes 275 and 276 in order to introduce and stop air to the actuator 207.

As shown in FIGS. 11 to 13, the measurement contact portions 202 </ b> A and 202 </ b> B extend from the reference plate 204 toward the mounting table 209, and penetrate the reference plate 204 in the ascending / descending direction Z. The measurement contact portions 202A and 202B have an axial shape, and as shown in FIG. 13, the sleeves 220A and 220B having a sliding function fixed to the reference plate 204 are moved in the ascending / descending direction (axial direction) Z. Each is slidably supported. Upper end surfaces 202Ac and 202Bc of the shaft-shaped measurement contact portions 202A and 202B protrude upward from the sleeves 220A and 220B, respectively. The detection units 203Aa and 203Ba of the measurement units 203A and 203B are in contact with the upper end surfaces 202Ac and 202Bc, respectively.
The other ends 202Ab and 202Bb of the measurement contact portions 202A and 202B positioned below the reference plate 204 are provided with floating portions 240A and 240B that are contact portions that contact the mounting surface 3c of the transmission case 3. . As shown in FIGS. 17 (a) and 17 (b), the floating portions 240A and 240B are connected to the end portions 241A and 241B of the other ends 202Ab and 202Bb of the measurement contact portions 202A and 202B, which are fixed portions, respectively. Metal parts 243A and 243B are movable with respect to the parts 241A and 241B via metal spheres 242A and 242B. The end portions 241A and 241B and the movable portions 243A and 243B are opposed to each other, and are fastened and fixed by a plurality of bolts 245A and 245B serving as fastening members via the spherical bodies 242A and 242B between the opposing surfaces. Therefore, they are integrated so that the gap S is formed. The lower surfaces 243Aa and 243Ba of the movable portions 243A and 243B form contact surfaces with the mating surface 3a. In the present embodiment, the plurality of measurement contact portions 202A and 202B are attached to the reference plate 204 so that the mating surface 3a and the lower surfaces 243Aa and 243Ba of the floating portions 240A and 240B face each other at different positions. In this embodiment, as shown by the two-dot chain line in FIGS. 11 and 12, the reference plate 204 is raised, and the lower surfaces 243Aa and 243Ba of the measurement contact portions 202A and 202B are attached as shown in FIG. A position away from the surface 3c is set as a standby position. In this embodiment, the reference plate 204 descends as shown by a solid line in FIG. 12, and the lower surfaces 243Aa and 243Ba of the measurement contact portions 202A and 202B come into contact with the mounting surface 3c as shown in FIG. Is a measurement position.

In the measurement unit 203, the detection units 203Aa and 203Ba are supported so as to be movable back and forth in the up-and-down direction Z with respect to the main bodies 203Ab and 203Bb, and the movement of the detection units 203Aa and 203Ba in the up-and-down direction Z is stored in the main bodies 203Ab and 203Bb. It is a well-known linear scale that is detected by a sensor.
In the present embodiment, the reference value of each measurement unit 203A, 203B is 0 (when the measurement surface occupies the measurement position and the lower surface 243a of the measurement contact unit 202 is inserted into the attachment units 3b, 3c and contacts the end surfaces 3b1, 3c1). Zero). In each of the measurement units 203A and 203B, addition (+) occurs when the detection units 203Aa and 203Ba move upward from the reference position, and subtraction (−) occurs when the detection units 203Aa and 203Ba move downward. Outputs from the measurement units 203A and 203B are input to the control unit 270 described later.
For example, when the distance L2 and the height difference L4 are set to 500 mm and this value is set to the reference value 0 (zero), when 203Aa and 203Ba move downward, the amount of movement α1 becomes 500mm-downward, and 203Aa and 203Ba are upward. When moving toward, the amount of movement α2 is 500 mm + upward.

As shown in FIG. 11, a pair of pressurizing means 260 that pressurizes the support plate 204 and suspends and supports the support plate 204 is provided on the long side portion 206 b of the slide frame 206. Each pressurizing means 260 is located outside the measurement contact portions 202A and 202B and, as shown in FIG. 14, on the same straight line O4 in plan view as the measurement contact portions 202A and 202B. Is arranged to be located.
As shown in FIGS. 18A and 18B, each pressurizing means 160 is moved in the up-and-down direction Z with respect to the casing 261 fixed to the long side portion 206 b of the slide frame 206 and the casing 261. A pressure rod 262 that is supported, a coil spring 263 that biases the pressure rod 262 toward the reference plate 204, and a holder 165 that supports the tip 262a side of the pressure rod 262 on the reference plate 204, respectively. I have.

Floating heads 266 are formed on the front ends 262a of the pressure rods 262, respectively. Each floating head 266 has a bottom surface 266a facing the top surface 204b of the reference plate 204 in a hemispherical shape. An inclined truncated cone portion 266b having a smaller diameter toward the upper side than the diameter of the bottom surface 266a is formed at a portion of the floating head 266 above the bottom surface 266a.
Each holder 265 is fixed to the reference plate 204. Each holder 265 is formed with an internal space 267 larger than the outer shape of the floating head 266. In each internal space 267, an inclined surface 267a that is parallel to the truncated cone part 266b is formed at a portion facing the truncated cone part 266b.
As shown in FIG. 18A, each floating head 266 has its holder 265 positioned downward when the measurement reference portion 201 and the measurement contact portions 202A and 202B are in the standby position. doing. Therefore, each floating head 266 is in a state in which the truncated cone part 266b abuts on the inclined surface 267a and the bottom surface 266a is lifted from the upper surface 204b of the reference plate 204. The weight on the reference plate 204 side does not act on each floating head 266 when the measurement reference portion 201 and the measurement contact portions 202A and 202B are at the measurement positions. Therefore, as shown in FIG. 18B, each floating head 266 protrudes toward the upper surface 204b of the reference plate 204 by the action of the coil spring 263, so that the truncated cone portion 266b is in contact with the inclined surface 267a. Each is eliminated, and the upper surface 204 of the reference plate 204 is configured to be pressurized.
The center of each floating head 266 and the center of each holder 65 are arranged on the same axis, and each floating head 66 with respect to each holder 65 is in contact with the truncated cone portion 66b and the inclined surface 67a. It is configured to be centered.

As shown in FIG. 19, the compressor 272, the pressure sensors 273A, 273B, 273C, the on-off valves 274A, 274B, 274C, the on-off valves 277, 278, the sensors 281, 282, and the measuring tools 203A, 203B Connected through a line.
The control unit 270 is configured by a computer that controls the operation of the compressor 273 and the operation of the measuring device 200. When the measurement start switch 251 provided on the operation panel 250 of the measuring device 200 is operated, the control unit 270 operates the compressor 272 to open the on-off valve 278 to lower the movable rod 208 of the actuator 207, The three measurement reference parts 201 and the two measurement contact parts 202A and 202B are moved toward the measurement position. When the sensor 282 detects the measurement position, the control unit 270 is configured to close the on-off valve 278 and simultaneously open the on-off valves 274A, 274B, 274C to inject air from the injection nozzles 230.
When the measurement end switch 252 provided on the operation panel 250 of the measuring device 200 is operated, the control unit 270 operates the compressor 272 to open the on-off valve 277 to raise and lower the movable rod 208 of the actuator 207. The three measurement reference parts 201 and the measurement contact parts 202A and 202B are moved toward the standby position. The control unit 270 is configured to stop the operation of the compressor 272 when the sensor 281 detects the standby position and hold the three measurement reference units 201 and the measurement contact units 202A and 202B at the standby position. Yes.
As shown in FIGS. 15 (b) and 17 (b), the control unit 270 is configured such that each measurement reference unit 201 and the measurement contact portions 202A and 202B are end surfaces 3b1 of the mating surface 3a and the mounting portions 3b and 3c, respectively. When the pressure P detected by the pressure nozzles 273 (A to C) is equal to or higher than a preset reference pressure P1 when abutting against 3c1, each measuring tool 203A , 203B is started. When the injection pressure from each injection nozzle 230, that is, the pressure P detected by the pressure sensor 273 (A to C) is less than the preset reference pressure P1, the control unit 270 uses the measuring tools 203A and 103B. Stop measurement. Stopping the measurement herein includes a mode in which data output from the measuring tools 203A and 203B is not used as a measurement value, or data output from the measuring tools 203A and 203B is not accepted.

According to the measurement apparatus 200 having such a configuration, when the measurement start switch 251 is operated by an operator, the three measurement reference parts 201 and the measurement contact parts 202A and 202B are moved from the standby position shown in FIG. When the sensor 282 detects the measurement position, it stops at the measurement position. Then, the lower surface 213a of the movable portion 213 of the measurement reference unit 201 comes into contact with the mating surface 3a as shown in FIG. 15B, and the lower surfaces 243Aa and 243Ba of the measurement contact portions 202A and 202B are in FIG. As shown in FIG. 18, the bottom surfaces 266a of the floating heads 266 of the pressurizing means 260 pressurize the reference plate 204, respectively, as shown in FIG. 18 (b) while contacting the end faces 3b1, 3c1 of the mounting portions 3b, 3c.
At this time, the lower surface 213a of each measurement reference unit 201 that is in contact with the contact surface 3a in a pressed state is connected to the end surface 211 of the other end 201b of each measurement reference unit 201 serving as a fixing unit via a sphere 212. Therefore, contact with the mating surface 3a is prevented.
In addition, the lower surfaces 243Aa and 243Ba of the measurement contact portions that contact the end surfaces 3b1 and 3c1 of the mounting portions 3b and 3c in a pressurized state are also movable with respect to the end portions 241A and 241B via the spheres 242A and 242B. Are provided in the movable 243A, 243B provided in the. For this reason, even when the end surfaces 3b1 and 3c1 of the mounting portion are inclined, the movable portions 243A and 243B are moved accordingly, and contact with the end surfaces 3b1 and 3c1 is prevented.
That is, in this embodiment, since the floating part 210 and the floating parts 240A and 240B are provided on both the mating surface 3a side, the reference side on the end face 3b1, 3c1 side of the mounting part, and the measurement side, measurement is performed as compared with the conventional configuration. Accuracy can be increased.

Since the floating part 210 of the measurement reference part 201 has the injection nozzles 230 for injecting air from the lower surface 213a of the movable part 213 toward the mating surface 3a, there is a foreign matter such as chips on the mating surface 3a. Can be blown away by the injected air.
Further, when the measurement reference part 201 and the measurement contact parts 202A and 202B occupy the measurement positions, the measurement is performed when the injection pressure P from each injection nozzle 230 is less than the preset reference pressure P1. Since measurement by the tools 203A and 203B is stopped, erroneous measurement can be prevented.
That is, if foreign matter such as cutting powder is attached to the mating surface 3a, a gap is formed between the lower surface 213a of the floating portion 210 of the measurement reference unit 201 that is a three-point support portion and the mating surface 3a. The pressure detected by the pressure sensors 273A to 273C does not reach the reference pressure P1. Therefore, measurement is not started. On the other hand, when the lower surface 213a of the floating portion 210 of the measurement reference unit 201 that is a three-point support portion and the mating surface 3a are in close contact with each other, the mating surface 3a and the lower surface 213a are in close contact with each other. The detected pressure increases. For this reason, when the pressure increase value becomes a preset reference pressure P1, measurement is started assuming that there is no floating between the lower surface 213a of the floating portion 210 and the mating surface 3a. Therefore, erroneous measurement can be prevented.
Further, in the present embodiment, the center of the floating head 266 and the center of each holder 265 are arranged on the same axis, and in the contact state between the truncated cone part 266b and the inclined surface 267a, Pressurizing means 260 and 260 configured to center the floating head 266 are provided. For this reason, since the pressure can be evenly applied to the reference plate 204 at the time of measurement, the mating surface 3a, the lower surface 213a of the measurement reference portion 201, and the end surfaces 3b1, 3c1 of the mounting portions 3b, 3c are measured. Unlike the contact between the lower surfaces 243Aa and 243Ba of the contact portions 202A and 202B, it is possible to prevent contact with each other and to increase measurement accuracy.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this specific embodiment, Unless it is specifically limited by the above-mentioned description, this invention described in the claim is described. Various modifications and changes are possible within the scope of the gist of the invention.
The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  2, 3 ... measurement object, 2a, 3a ... reference plane, 3b1, 3c1, 8a, 9a ... measurement location of measurement object, 100, 200 ... measuring device, 101, 201 ... Measurement reference part, 102a, 102B, 202A, 202B ... measurement contact part, 103A, 103B, 203A, 203B ... measurement tool, 111, 141A, 141B, 211, 241A, 241B ... fixed part, 112, 212, 242A, 242B ... sphere, 113, 143A, 143B, 213, 243A, 243B ... movable part, 113a, 143Aa, 143Ba, 213a, 243Aa, 243Ba ... contact surface, 130, 230 ... Injection part, P ... Injection pressure, P1 ... Reference pressure

Claims (3)

A plurality of measurement reference parts capable of contacting the reference surface of the measurement object;
A plurality of measurement contact portions capable of contacting the measurement location of the measurement object;
A measuring tool for measuring a distance between the reference surface and the measurement location in a state where the measurement reference portion and the measurement contact portion are in contact with the reference surface and the measurement location, respectively.
The measurement reference portion and the measurement contact portion each include a fixed portion and a movable portion that is movable with respect to the fixed portion and includes the reference surface and a contact surface that contacts the measurement location. A measuring device characterized by that. The measuring device according to claim 1,
The measurement reference unit includes an injection unit that injects air from the contact surface toward the reference surface. The measuring device according to claim 2,
When the measurement reference part and the measurement contact part are in contact with the reference surface and the measurement location, respectively, if the injection pressure from each of the injection parts does not satisfy a preset reference pressure, the measurement A measuring device characterized by stopping measurement by a tool.

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