Installation method and jig set

Abstract

To provide an installation method for positioning an optical measuring instrument with accuracy.SOLUTION: An installation method for installing an optical measuring instrument 2 on an installation stand using a positioning member 30 comprises: joining a first joint part provided on the positioning member 30 to a second joint part provided on the installation stand; and joining a third joint part 73 provided on the positioning member 30 to an opening part 21, which is provided on the optical measuring instrument 2 and defines an optical path.SELECTED DRAWING: Figure 14

Description

[Technical Field]

[0001] The present disclosure relates to an installation method and a jig set for installing an optical measuring instrument on an installation stand. [Background technology]

[0002] Conventionally, systems have been developed that automatically measure the optical properties of multiple samples in sequence (hereinafter referred to as "automatic measurement systems"). For example, an automatic measurement system includes an optical measurement instrument, a robot that sequentially picks up samples, and a controller that controls the robot to move the samples to target measurement positions of the optical measurement instrument. In order to accurately move the samples to the target measurement positions of the optical measurement instrument, the optical measurement instrument, the samples, and the robot must be positioned in advance at target positions in the workspace. Therefore, various positioning techniques have been developed.

[0003] For example, Japanese Patent Laid-Open Publication No. 61-294507 (Patent Document 1) discloses a technique for positioning a robot hand at a fixed position within a workspace, and Japanese Patent Laid-Open Publication No. 2015-208791 (Patent Document 2) discloses a technique for correcting positional deviation of a measuring device relative to a sample. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 61-294507 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-208791 Summary of the Invention [Problem to be solved by the invention]

[0005] In general, a stationary optical measuring instrument may have a structure (e.g., a hole, a slot, or the like) for positioning at a specific position in a workspace. However, a user may desire to incorporate a conventionally used optical measuring instrument (e.g., a handheld optical measuring instrument) into an automatic measurement system. A handheld optical measuring instrument is not designed to be positionable at a specific position in a workspace. Therefore, when incorporating such an optical measuring instrument into an automatic measurement system, the user must spend time and effort to accurately position the optical measuring instrument at a specific position in the workspace.

[0006] Neither Patent Document 1 nor Patent Document 2 aims to position an optical measuring instrument at a specific position in a working space.

[0007] In order to solve these problems, one object of the present disclosure is to position an optical measuring instrument with high precision. [Means for solving the problem]

[0008] According to one aspect of the present disclosure, an installation method for installing an optical measuring instrument on an installation stand using a positioning member includes joining a first joint provided on the positioning member to a second joint provided on the installation stand, and joining a third joint provided on the positioning member to an opening provided on the optical measuring instrument for defining an optical path.

[0009] Bonding the first bond to the second bond may be performed before bonding the third bond to the opening.

[0010] Alternatively, joining the first joint to the second joint may be performed after joining the third joint to the opening.

[0011] Preferably, the third joint has a protrusion insertable into the opening and a first flat surface formed around the protrusion. Joining the third joint to the opening includes inserting the protrusion into the opening and joining the first flat surface to a second flat surface around the opening of the optical measuring instrument.

[0012] Preferably, the installation method further comprises supporting the optical measuring instrument using a support mechanism provided on the installation table in a state in which the first joint is joined to the second joint and the third joint is joined to the opening.

[0013] Preferably, the optical measuring device has a plane in which the opening is formed. The support mechanism includes a first support member whose position is adjustable along a first direction perpendicular to the plane, a second support member whose position is adjustable along a second direction perpendicular to the first direction and capable of sandwiching an object therebetween, and a third support member whose position is adjustable along a third direction perpendicular to the first and second directions and capable of sandwiching an object therebetween. Supporting the optical measuring device includes adjusting the position of the first support member to abut against the optical measuring device, adjusting the position of the second support member to abut against the optical measuring device and sandwiching the optical measuring device between the second support member, and adjusting the position of the third support member to abut against the optical measuring device and sandwiching the optical measuring device between the third support member.

[0014] Preferably, at least one of the second support member and the third support member has an adjustment portion whose position relative to the optical measuring device is adjustable, and a pressing portion located on the opposite side of the adjustment portion with the optical measuring device in between, and pressing the optical measuring device toward the adjustment portion. Clamping the optical measuring device with at least one of the second support member and the third support member includes pressing the pressing portion against the optical measuring device, and adjusting the position of the adjustment portion so that it abuts against the optical measuring device while the pressing portion is pressing the optical measuring device.

[0015] Preferably, adjusting the position of the first support member includes adjusting the position of the first support member so that the amount of force in the first direction that the third joint receives from the optical measuring device is kept to be equal to or less than a first specified value. Clamping the optical measuring device with the second support member includes adjusting the position of the second support member so that the amount of force in the second direction that the third joint receives from the optical measuring device is kept to be equal to or less than a second specified value. Clamping the optical measuring device with the third support member includes adjusting the position of the third support member so that the amount of force in the third direction that the third joint receives from the optical measuring device is kept to be equal to or less than a third specified value.

[0016] Preferably, the optical measuring device includes a body including the opening and having an outer curved surface, and a holder attached to the body so as to cover the outer curved surface. The holder has an outer flat surface. Supporting the optical measuring device includes abutting a support mechanism against the outer flat surface.

[0017] Preferably, the installation method further comprises releasing the connection between the first joint and the second joint, and releasing the connection between the third joint and the opening, while the optical measuring instrument is supported by the support mechanism.

[0018] A jig set according to another aspect of the present disclosure includes an installation table and a positioning member for assisting installation of an optical measuring instrument on the installation table. The positioning member includes a first joint, the first joint having a shape that allows it to be joined to a second joint provided on the installation table. The positioning member further includes a third joint, the third joint having a shape that allows it to be joined to an opening provided in the optical measuring instrument for defining an optical path. The installation table has a support mechanism that supports the optical measuring instrument so as to maintain a relative positional relationship between the installation table and the optical measuring instrument when the first joint is joined to the second joint and the third joint is joined to the opening. [Effects of the Invention]

[0019] According to the installation method and jig set of the present disclosure, the optical measuring instrument is positioned on the installation table with high precision. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a diagram showing an example of the overall configuration of an automatic measurement system according to an embodiment of the present invention; [Figure 2] FIG. 1 is a diagram illustrating an example of a stationary optical measuring instrument. [Figure 3] FIG. 1 is a perspective view of an example of an optical measuring instrument that does not have a structure for positioning. [Figure 4] FIG. 4 is an exploded perspective view of the optical measuring instrument shown in FIG. 3. [Figure 5] FIG. 2 is an external perspective view showing an example of an installation stand. [Figure 6] FIG. 6 is a front view showing an upper part of the installation stand shown in FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6. [Figure 8] FIG. 8 is an enlarged view of the area enclosed by the dashed line in FIG. 7. [Figure 9] FIG. 10 is an external perspective view showing an example of incorporating an installation stand into an automatic measurement system. [Figure 10] FIG. 2 is an external perspective view showing an example of a positioning member. [Figure 11] FIG. 11 is a side view of the positioning member shown in FIG. [Figure 12] FIG. 11 is a front view of the positioning member shown in FIG. [Figure 13] 10 is a flowchart showing an example of the flow of a method for installing the optical measuring instrument 2. [Figure 14] FIG. 10 is a diagram illustrating step S3. [Figure 15] 10A and 10B are diagrams illustrating the positional relationship between an opening of the optical measuring instrument and a pin of a positioning member. [Figure 16] FIG. 10 is a diagram illustrating step S2. [Figure 17] FIG. 10 is a perspective view of the appearance of the upper part of the installation table after steps S2 and S3 are completed. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments and modifications according to the present disclosure will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated. Note that the embodiments and modifications described below may be selectively combined as appropriate.

[0022] <Overall configuration of the automatic measurement system> 1 is a diagram showing an example of the overall configuration of an automatic measurement system according to this embodiment. As shown in Fig. 1, the automatic measurement system 100 includes an optical measuring instrument 2, a robot 3, a tray 4, a base plate 6, and a computer 8.

[0023] The tray 4 is used to place one or more samples 5, the optical properties of which are to be measured. The tray 4 has L-shaped guides 41 for positioning each sample 5. In the example shown in FIG. 1, the sample 5 has a rectangular shape in a plan view. The sample 5 is placed so that one corner of the sample 5 and two sides surrounding this corner contact the corner and two sides of the guide 41. This allows the sample 5 to be placed at a specific position on the tray 4 in a specific orientation.

[0024] The robot 3 picks up the sample 5. The robot 3 is not particularly limited, but may be, for example, a vertical articulated robot. The robot 3 includes a base 301, an arm 302, and an end effector 303. The arm 302 is provided on the base 301. The end effector 303 is attached to the tip of the arm 302 and has a mechanism for holding the sample 5. The mechanism for holding the sample 5 includes, for example, a suction pad.

[0025] The tray 4 and the base 301 of the robot 3 are placed on a base plate 6. The base plate 6 has a structure (for example, parallel pins) for positioning the tray 4 and the base 301. As a result, the tray 4 and the base 301 of the robot 3 are placed at a specific position on the base plate 6 in a specific posture.

[0026] The optical measuring instrument 2 measures the optical characteristics of the sample 5. The optical measuring instrument 2 is not particularly limited, but may be, for example, a colorimeter or a glossmeter. The optical measuring instrument 2 includes a light-emitting element 27 that emits light toward the sample 5 and one or more light-receiving elements 28 that receive reflected light from the sample 5. For this reason, the optical measuring instrument 2 is formed with an opening 21 that defines the optical path. That is, the light emitted from the light-emitting element 27 passes through the opening 21 and is irradiated to the outside. The light-receiving element 28 receives reflected light from the outside through the opening 21. The opening 21 is also referred to as an aperture. The position and shape of the opening 21 affect the performance of the optical measuring instrument 2. For this reason, the optical measuring instrument 2 is manufactured so that errors in the position and shape of the opening 21 are minimized.

[0027] Fig. 2 is a diagram showing an example of a stationary optical measuring instrument. Optical measuring instrument 200 shown in Fig. 2 has a substantially cubic shape. An opening 210 is formed in the side of optical measuring instrument 200. A hole 220 and an elongated hole 230 are formed in the bottom surface of optical measuring instrument 200.

[0028] Base plate 6 may have, as a structure for positioning optical measuring device 200, two pins that can be inserted into hole 220 and elongated hole 230. This makes it possible to easily position optical measuring device 200 on base plate 6.

[0029] However, as described above, a user may desire to incorporate an instrument (e.g., a handheld instrument) that does not have a structure (e.g., hole 220 and slot 230) for positioning at a specific position in the workspace as the optical measuring instrument 2 into the automatic measurement system 100. For this reason, as shown in FIG. 1 , the automatic measurement system 100 according to this embodiment includes a jig set 1 that supports the positioning of the opening 21 of the optical measuring instrument 2. The jig set 1 includes an installation table 10 and a positioning member 30. Details of the method for installing the optical measuring instrument 2 using the jig set 1 will be described later.

[0030] The system origin 7 is the origin of a workspace in which the automatic measurement system 100 is installed. In the example shown in FIG.

[0031] As described above, the tray 4 and the base 301 of the robot 3 are placed at a specific position and in a specific orientation on the platform 6. Furthermore, the samples 5 are placed at a specific position and in a specific orientation on the tray 4. Therefore, the position and orientation of the robot 3 are specified by the coordinates and Euler angles of a Cartesian coordinate system having the system origin 7. Similarly, the position and orientation of each sample 5 is specified by the coordinates and Euler angles of a Cartesian coordinate system having the system origin 7.

[0032] Furthermore, the position and orientation of the opening 21 of the optical measuring instrument 2 is determined using the jig set 1. Therefore, the position and orientation of the opening 21 of the optical measuring instrument 2 is also specified by the coordinates and Euler angles of a Cartesian coordinate system having the system origin 7.

[0033] The computer 8 controls the robot 3 so that the samples 5 are picked up in order and moved to a target measurement position facing the opening 21 of the optical measuring instrument 2. The computer 8 stores the positions and orientations of the base 301 of the robot 3, the samples 5, and the opening 21 of the optical measuring instrument 2. The computer 8 controls the operation of the robot 3 based on these positions and orientations.

[0034] Specifically, the computer 8 acquires the displacement amount of each axis of the robot 3 from the encoder of the robot 3. The computer 8 calculates the current position and posture of the end effector 303 based on the position and posture of the base 301 and the displacement amount. The computer 8 calculates a first target position and posture that the end effector 303 should take in order to hold the sample 5, based on the position and posture of the sample 5. The first target position and posture is the position and posture of the end effector 303 when holding a predetermined holding point of the sample 5. The computer 8 calculates a first target path for the end effector 303 to move to the first target position and posture, based on the current position and posture of the end effector 303 and the first target position and posture. The computer 8 controls the robot 3 so that the end effector 303 operates along the first target path.

[0035] The computer 8 calculates a target measurement position facing the opening 21 based on the position and orientation of the opening 21 of the optical measuring instrument 2 .

[0036] In response to the end effector 303 holding the sample 5, the computer 8 calculates a second target position and posture of the end effector 303 when a predetermined target point on the sample 5 coincides with the target measurement position. The computer 8 calculates the second target position and posture based on the current position and posture of the end effector 303 and the relative positional relationship between the holding point and the target point. The computer 8 calculates a second target path for the end effector 303 to move to the second target position and posture based on the current position and posture of the end effector 303 and the second target position and posture. The computer 8 controls the robot 3 so that the end effector 303 operates along the second target path.

[0037] When the end effector 303 reaches the second target position and posture, the computer 8 outputs a trigger signal to start measurement to the optical measuring instrument 2. This causes the optical measuring instrument 2 to automatically measure the optical properties of the target point on the sample 5. After the measurement is completed, the computer 8 controls the robot 3 to return the sample 5 to the tray 4.

[0038] <Example of optical measuring instrument> Fig. 3 is a perspective view of the exterior of an example of an optical measuring instrument that does not have a positioning structure. Fig. 4 is an exploded perspective view of the optical measuring instrument shown in Fig. 3. Fig. 3 shows a handheld optical measuring instrument 2. The optical measuring instrument 2 includes a measuring instrument main body 20 and a holder 50.

[0039] The measuring device main body 20 incorporates the light emitting element 27 and one or more light receiving elements 28 shown in Fig. 1. The measuring device main body 20 may incorporate a plurality of light receiving elements 28.

[0040] An opening 21 for defining an optical path is formed in the housing of the measurement device main body 20. When the measurement device main body 20 has multiple light receiving elements 28 built in, the opening 21 must define an optical path corresponding to each of the multiple light receiving elements 28. In other words, the opening 21 must define an optical path having multiple projection angles. For this reason, as shown in the figure, the opening 21 has a generally elongated hole shape. The opening 21 includes two first portions 211 having a relatively small width in the short direction of the generally elongated hole shape, and a second portion 212 having a relatively large width in the short direction of the generally elongated hole shape. The second portion 212 is located between the two first portions 211.

[0041] The outer surface of the measuring device body 20 includes a plane 22 on which the opening 21 is formed. In other words, the plane 22 is the surface surrounding the opening 21. The plane 22 is in close contact with the object (e.g., the sample 5) whose optical properties are to be measured. This prevents ambient light from entering the opening 21.

[0042] The outer surface of the measuring device body 20 further includes a curved surface (hereinafter referred to as "outer curved surface 23") designed to make it easier to hold in a human hand.

[0043] Holder 50 is attached to measuring device body 20 so as to cover outer curved surface 23. As shown in FIG. 4 , holder 50 includes part 51 and part 52. Parts 51 and 52 sandwich measuring device body 20 and are connected to each other using screws. In this way, holder 50 is integrated with measuring device body 20.

[0044] The outer surface of holder 50 includes a back surface 56 (shown clearly in FIG. 16 ) that is parallel to flat surface 22 of meter body 20 when holder 50 is integrated with meter body 20. Furthermore, the outer surface of holder 50 includes an upper surface 53 and a lower surface 54 that are perpendicular to the longitudinal direction of opening 21 of meter body 20 when holder 50 is integrated with meter body 20. In addition, the outer surface of holder 50 includes two side surfaces 55 that are parallel to the longitudinal direction of opening 21 of meter body 20 and perpendicular to flat surface 22 and back surface 56 when holder 50 is integrated with meter body 20.

[0045] Each of the upper surface 53, the lower surface 54, the two side surfaces 55, and the rear surface 56 is flat and is an example of an "external flat surface" of the present disclosure.

[0046] When the user wishes to use the optical measuring instrument 2 as a portable instrument, the user removes the holder 50 from the measuring instrument body 20 and holds the measuring instrument body 20 to measure the optical properties of the object to be measured. When the user wishes to incorporate the optical measuring instrument 2 into the automatic measurement system 100, the user attaches the holder 50 to the measuring instrument body 20.

[0047] <Example of installation stand> An example of the installation stand 10 will be described with reference to Figs. 5 to 9. Fig. 5 is an external perspective view showing an example of the installation stand. Fig. 6 is a front view showing the upper part of the installation stand shown in Fig. 5. Fig. 7 is a cross-sectional view taken along the line AA in Fig. 6. Fig. 8 is an enlarged view of the area enclosed by the dashed line in Fig. 7. Figs. 5 to 7 show the installation stand 10 when it is supporting an optical measuring instrument 2. Fig. 9 is an external perspective view showing an example of incorporating the installation stand into an automatic measurement system.

[0048] As shown in FIG. 5, the installation table 10 includes a base plate 11 and an upright plate 12 that is vertically erected on the base plate 11. FIGS. 5 to 7 show a coordinate system having X, Y, and Z axes as a Cartesian coordinate system based on the installation table 10. The Z axis is parallel to a direction perpendicular to the base plate 11. The Y axis is parallel to a direction perpendicular to the upright plate 12. The X axis is perpendicular to the Y axis and the Z axis, and is parallel to the base plate 11 and the upright plate 12. The X axis direction is an example of a "second direction" in the present disclosure. The Y axis direction is an example of a "first direction" in the present disclosure. The Z axis direction is an example of a "third direction" in the present disclosure.

[0049] The installation table 10 further includes a right side plate 13, a left side plate 14, an upper plate 15, and a lower plate 16, which are vertically erected on one surface of the erecting plate 12 (the surface on the -Y side in the figure). The right side plate 13 and the left side plate 14 are arranged perpendicular to the X axis and facing each other. The upper plate 15 and the lower plate 16 are arranged perpendicular to the Z axis and facing each other. The upper plate 15 and the lower plate 16 are arranged to sandwich the space between the right side plate 13 and the left side plate 14. As shown in FIGS. 5 to 7 , the space surrounded by the right side plate 13, the left side plate 14, the upper plate 15, and the lower plate 16 has a size capable of accommodating the optical measuring device 2. Using an installation method described below, the optical measuring device 2 is installed on the installation table 10 so that the plane 22 is perpendicular to the Y axis.

[0050] The height of the left side plate 14 relative to the standing plate 12 (that is, the length in the Y direction) is the same as the height of the right side plate 13 relative to the standing plate 12 (that is, the length in the Y direction).

[0051] A hole 141 and an elongated hole 142 are formed in the end face of the left side plate 14 opposite to the standing plate 12. The longitudinal direction of the elongated hole 142 is parallel to the Z-axis direction. A line connecting the center of the hole 141 and the center of the elongated hole 142 is parallel to the Z-axis direction. The hole 141 and the elongated hole 142 form the second joint portion 72. Furthermore, one or more screw holes 143 are formed in the end face of the left side plate 14 opposite to the standing plate 12. In the example shown in FIG. 6, two screw holes 143 are formed in the left side plate 14.

[0052] One or more screw holes 131 are formed in the end surface of the right side plate 13 opposite to the standing plate 12. In the example shown in FIG.

[0053] The installation base 10 is further provided with a support mechanism for supporting the optical measuring instrument 2. The support mechanism includes three or more adjustment units 121 whose positions along the Y-axis direction are adjustable. The three or more adjustment units 121 are provided on the standing plate 12. The three or more adjustment units 121 are an example of a "first support member" in the present disclosure. In the example shown in FIGS. 5 to 7, the support mechanism includes four adjustment units 121.

[0054] The support mechanism further includes a support member set 17 whose position along the X-axis direction is adjustable and which can clamp an object therebetween. The support member set 17 is an example of a "second support member" in the present disclosure. The support member set 17 includes three or more adjustment units 144 whose position relative to the optical measuring device 2 is adjustable, and a toggle clamp 133 located on the opposite side of the optical measuring device 2 from the three or more adjustment units 144 and which presses the optical measuring device 2 toward the three or more adjustment units 144. The three or more adjustment units 144 are provided on the left side plate 14 and are movable along the X-axis direction. In the example shown in FIGS. 5 to 7 , the support member set 17 includes three adjustment units 144. The toggle clamp 133 is attached to the right side plate 13. The toggle clamp 133 is an example of a "pressure unit" in the present disclosure.

[0055] The support mechanism further includes a support member set 18 whose position along the Z-axis direction is adjustable and which can clamp an object therebetween. The support member set 18 is an example of a "third support member" in the present disclosure. The support member set 18 includes three or more adjustment units 161 whose position relative to the optical measuring device 2 is adjustable, and a toggle clamp 151 located on the opposite side of the optical measuring device 2 from the three or more adjustment units 161 and which presses the optical measuring device 2 toward the three or more adjustment units 161. The three or more adjustment units 161 are provided on the lower plate 16 and are movable along the Z-axis direction. In the example shown in FIGS. 5 to 7 , the support member set 18 includes three adjustment units 161. The toggle clamp 151 is attached to the upper plate 15. The toggle clamp 151 is an example of a "pressing unit" in the present disclosure.

[0056] As shown in FIG. 8 , the adjustment part 161 includes a bolt 61, a nut 63, and a cap 64. A hexagonal hole 62 is formed in the head of the bolt 61. The bolt 61 is threaded into a threaded through-hole in the lower plate 16. The bolt 61 moves along the Z direction by rotating. The nut 63 is threaded onto the bolt 61 until it comes into contact with the lower plate 16, fixing the position of the bolt 61. The cap 64 covers the head of the bolt 61. The cap 64 is removed when adjusting the position of the bolt 61. The cap 64 is attached to the head of the bolt 61 after adjusting the position of the bolt 61. This prevents the position of the bolt 61 from being unintentionally changed.

[0057] The adjustment part 121 has the same structure as the adjustment part 161. However, the bolt 61 of the adjustment part 121 is threaded into a through-hole of the standing plate 12, and moves in the Y direction by rotating.

[0058] The adjustment part 144 has the same structure as the adjustment part 161. However, the bolt 61 of the adjustment part 144 is threaded into a through-hole in the left side plate 14, and moves in the X direction by rotating.

[0059] As shown in FIG. 9, the base plate 11 of the installation table 10 is attached to the base plate 6 of the automatic measurement system 100. The base plate 6 has a structure (for example, a parallel pin) for positioning the base plate 11. The base plate 11 is attached to the base plate 6 so as to be joined to the structure. As a result, the base plate 11 is attached to a specific position on the base plate 6 in a specific orientation. Therefore, the position and orientation of the installation table 10 are specified by the coordinates and Euler angles of a Cartesian coordinate system having a system origin 7.

[0060] <Examples of positioning members> An example of the positioning member 30 will be described with reference to Fig. 10 to Fig. 12. Fig. 10 is an external perspective view showing an example of the positioning member. Fig. 11 is a side view of the positioning member shown in Fig. 10. Fig. 12 is a front view of the positioning member shown in Fig. 10.

[0061] The positioning member 30 shown in FIGS. 10 to 12 includes a rectangular plate 39, pins 31 to 34, and handles 36 and 37.

[0062] The pins 31 and 32 are attached to the plate 39 so as to protrude from one flat main surface 381 of the plate 39. The pins 31 and 32 constitute a first joint 71 and have a shape that allows them to be joined to a second joint 72 provided on the installation base 10. Specifically, the diameter of the pin 31 is designed to be slightly smaller than the diameter of the hole 141 of the installation base 10. The diameter of the pin 32 is designed to be slightly smaller than the width in the short direction of the elongated hole 142 of the installation base 10. The distance between the central axes of the pins 31 and 32 is designed to match the distance between the centers of the hole 141 and the elongated hole 142. The pins 31 and 32 are arranged near and along one side surface 391 of the rectangular plate 39.

[0063] The pins 33 and 34 pass through through holes 393 and 394 provided in the plate 39. One end of the pin 33 protrudes from the main surface 381. The other end of the pin 33 is connected to the handle 36. One end of the pin 34 protrudes from the main surface 381. The other end of the pin 34 is connected to the handle 37.

[0064] The pins 33, 34 and the main surface 381 formed around the pins 33, 34 constitute the third joint 73 and have a shape that allows them to be joined to the opening 21 of the optical measuring instrument 2. Specifically, the diameter of the pin 33 is designed to be slightly smaller than twice the radius of curvature of the end of the first portion 211 of the opening 21. The diameter of the pin 34 is designed to be slightly smaller than the width in the short direction of the second portion 212 of the opening 21. The distance between the central axes of the pins 33 and 34 is designed to be half the length of the opening 21 in the longitudinal direction minus the radius of curvature of the end of the first portion 211.

[0065] The pins 33 and 34 are an example of a "protrusion" in the present disclosure. The main surface 381 is an example of a "first plane" in the present disclosure.

[0066] An imaginary line 395 connecting the centers of pins 33 and 34 is parallel to an imaginary line 396 connecting the centers of pins 31 and 32. Imaginary line 395 is located midway between side surface 391 and side surface 392 of plate 39 opposite side surface 391.

[0067] Two through holes 351 are formed in the plate 39 near a side surface 391 and along the side surface 391. Furthermore, two through holes 352 are formed in the plate near a side surface 392 and along the side surface 392. The relative positional relationship between the two through holes 351 and the two through holes 352 is designed to match the relative positional relationship between the two screw holes 143 and the two screw holes 131 of the installation table 10. Furthermore, the relative positional relationship of the two through holes 351 with respect to the pins 31 and 32 is designed to match the relative positional relationship of the two screw holes 143 with respect to the hole 141 and the elongated hole 142 of the installation table 10. The relative positional relationship of the two through holes 352 with respect to the pins 31 and 32 is designed to match the relative positional relationship of the two screw holes 131 with respect to the hole 141 and the elongated hole 142 of the installation table 10.

[0068] Handles 36 and 37 are attached to the other main surface 382 of plate 39 using screws 361 and 371, respectively. By removing screw 361, the user can move handle 36 in a direction perpendicular to main surface 382, ​​thereby moving pin 33 connected to handle 36 in the same direction. Similarly, by removing screw 371, the user can move handle 37 in a direction perpendicular to main surface 382, ​​thereby moving pin 34 connected to handle 37 in the same direction.

[0069] <Installation procedure> 13 to 17 in addition to Figures 3 to 12, the flow of the installation method for the optical measuring instrument 2 will be described. Figure 13 is a flowchart showing an example of the flow of the installation method for the optical measuring instrument 2. Steps S1 to S5 included in the installation method are carried out by the user.

[0070] The installation method includes step S1 of preparing the optical measuring instrument 2 to be installed. If the measuring instrument body 20 and the holder 50 are separate, in step S1 the user attaches the holder 50 to the measuring instrument body 20 (see FIG. 4).

[0071] The installation method further includes steps S2 and S3 after step S1. Step S2 is a step of joining a first joint 71 of the positioning member 30 to a second joint 72 of the installation table 10. Step S3 is a step of joining a third joint 73 of the positioning member 30 to the opening 21 of the optical measuring instrument 2. Note that step S2 may be performed before or after step S3.

[0072] 14 is a diagram illustrating step S3. As described above, the third joint portion 73 includes the pins 33, 34 and the main surface 381 formed around the pins 33, 34. Therefore, as shown in FIG. 14, step S3 includes inserting the pins 33, 34 of the positioning member 30 into the opening 21 of the optical measuring instrument 2. Furthermore, step S3 includes joining the main surface 381 around the pins 33, 34 to the flat surface 22 around the opening 21 in the optical measuring instrument 2.

[0073] 15 is a diagram showing the positional relationship between the opening of the optical measuring instrument and the pins of the positioning member. As shown in FIG. 15, pin 33 is inserted into first portion 211 of opening 21 so as to contact the upper end of first portion 211. Pin 34 is inserted into approximately the center of second portion 212 of opening 21. As described with reference to FIG. 14, pins 33 and 34 are inserted until main surface 381 and plane 22 are joined. This determines the relative position and orientation of positioning member 30 and optical measuring instrument 2.

[0074] Fig. 16 is a diagram illustrating step S2. Fig. 16 shows step S2, which is performed after step S3. That is, the positioning member 30, to which the optical measuring device 2 has already been joined, is joined to the installation table 10.

[0075] As described above, the first joint portion 71 includes the pins 31 and 32. Furthermore, the second joint portion 72 includes a hole 141 and an elongated hole 142 (see FIG. 6). Therefore, as shown in FIG. 16, step S2 includes inserting the pins 31 and 32 of the positioning member 30 into the hole 141 and the elongated hole 142 (see FIG. 6) of the left side plate 14 of the installation table 10, respectively. By inserting the pin 31 into the hole 141, the XZ coordinates of the pin 31 are determined in a Cartesian coordinate system based on the installation table 10. Furthermore, by inserting the pin 32 into the elongated hole 142, rotation of the positioning member 30 around the pin 31 is restricted. The pins 31 and 32 are inserted until the main surface 381 and the left side plate 14 are joined. As a result, the Y coordinate of the positioning member 30 is determined in a Cartesian coordinate system based on the installation table 10. Furthermore, the user passes four screws 40 through two through holes 351 and two through holes 352 (see FIGS. 10 and 12) of the positioning member 30 and screws them into two screw holes 143 and two screw holes 131 (see FIG. 6) of the installation base 10. This prevents the positioning member 30 from falling off the installation base 10.

[0076] 17 is a perspective view of the appearance of the upper part of the installation table after completion of steps S2 and S3. In step S2, the position and orientation of positioning member 30 is determined in an orthogonal coordinate system with installation table 10 as the reference. Furthermore, in step S3, the relative position and orientation of opening 21 of optical measuring instrument 2 with respect to positioning member 30 is determined. As a result, the position and orientation of opening 21 of optical measuring instrument 2 is also determined in an orthogonal coordinate system with installation table 10 as the reference.

[0077] The height of the left side plate 14 relative to the standing plate 12 is the same as the height of the right side plate 13 relative to the standing plate 12. Therefore, the main surface 381 (see FIG. 14) of the positioning member 30 joined to the left side plate 14 and the right side plate 13 is parallel to the standing plate 12. As described above, the flat surface 22 of the optical measuring instrument 2 joins to the main surface 381 of the positioning member 30. In the optical measuring instrument 2, the back surface 56 is parallel to the flat surface 22 (see FIG. 3). Therefore, after steps S2 and S3 are performed, the back surface 56 of the optical measuring instrument 2 is parallel to the standing plate 12 and perpendicular to the Y-axis direction.

[0078] As described above, the imaginary line 395 connecting the centers of the pins 33 and 34 is parallel to the imaginary line 396 connecting the centers of the pins 31 and 32. Furthermore, the line connecting the center of the hole 141 into which the pin 31 is inserted and the center of the elongated hole 142 into which the pin 32 is inserted is parallel to the Z-axis direction. Therefore, the imaginary line 395 connecting the centers of the pins 33 and 34 is parallel to the Z-axis direction. The pins 33 and 34 are joined to the opening 21 of the optical measuring instrument 2, which has a substantially elongated hole shape. Therefore, the longitudinal direction of the opening 21 is parallel to the Z-axis direction. As described above, the side surface 55 of the optical measuring instrument 2 is parallel to the longitudinal direction of the opening 21 and perpendicular to the plane 22. Therefore, after steps S2 and S3 are performed, the side surface 55 of the optical measuring instrument 2 is perpendicular to the X-axis direction.

[0079] The upper surface 53 and the lower surface 54 of the optical measuring instrument 2 are perpendicular to the longitudinal direction of the opening 21. That is, after steps S2 and S3 are performed, the upper surface 53 and the lower surface 54 of the optical measuring instrument 2 are perpendicular to the Z-axis direction.

[0080] 13, the installation method further includes step S4. Step S4 is a step of supporting the optical measuring instrument 2 using a support mechanism provided on the installation table 10 in a state in which the first joint is joined to the second joint and the third joint is joined to the opening 21.

[0081] In step S1, the outer curved surface 23 of the measuring device body 20 is covered by the holder 50, which has a flat upper surface 53, a lower surface 54, a side surface 55, and a rear surface 56. Therefore, step S4 includes abutting a support mechanism against the upper surface 53, the lower surface 54, the side surface 55, and the rear surface 56. As a result, the optical measuring device 2 is stably supported by the support mechanism.

[0082] The support mechanism includes, as first support members, four adjustment units 121 whose positions along the Y-axis direction are adjustable. Therefore, step S4 includes adjusting the positions of the four adjustment units 121 so that they abut against the optical measuring instrument 2. That is, as shown in FIG. 7 , the user rotates the bolts 61 of the four adjustment units 121 to abut against the optical measuring instrument 2 (specifically, the back surface 56).

[0083] As described above, the back surface 56 is perpendicular to the Y-axis direction. Therefore, the optical measuring instrument 2 receives force only in the Y-axis direction from the four adjustment units 121, and does not receive force in the X-axis or Z-axis directions. In this way, by covering the measuring instrument main body 20 having the outer curved surface 23 with the holder 50 having the flat back surface 56, the application of force to the optical measuring instrument 2 in an unintended direction is prevented.

[0084] Adjusting the positions of the four adjustment units 121 preferably includes adjusting the positions of the four adjustment units 121 so that the amount of force in the Y direction that the main surface 381 of the positioning member 30 receives from the optical measuring device 2 is kept below a first specified value. For example, the user uses a feeler gauge to measure the gap distance between the main surface 381 and the optical measuring device 2 and the gap distance between the adjustment units 121 and the optical measuring device 2. The user then moves the position of the adjustment units 121 in the Y direction by the sum of these distances. This keeps the amount of force in the Y direction that the main surface 381 receives from the optical measuring device 2 below the first specified value. Note that the first specified value is determined in advance so that the optical measuring device 2 is not displaced by the force received from the four adjustment units 121 when the connection between the third joint 73 of the positioning member 30 and the opening 21 of the optical measuring device 2 is released in step S5, which will be described later.

[0085] The support mechanism includes, as a second support member, a support member set 17 whose position along the X-axis direction is adjustable and which can hold an object therebetween. Therefore, step S4 includes adjusting the position of the support member set 17 so that it abuts against the optical measuring instrument 2, and holding the optical measuring instrument 2 with the support member set 17.

[0086] As described above, the support member set 17 includes three or more adjustment units 144 and the toggle clamp 133. Therefore, as shown in Fig. 6, clamping the optical measuring instrument 2 with the support member set 17 includes pressing the toggle clamp 133 against the optical measuring instrument 2. Furthermore, clamping the optical measuring instrument 2 with the support member set 17 includes adjusting the positions of the three or more adjustment units 144 so that they abut against the optical measuring instrument 2 (specifically, the side surface 55) in a state in which the toggle clamp 133 is pressing against the optical measuring instrument 2.

[0087] As described above, the side surface 55 is perpendicular to the X-axis direction. Therefore, the optical measuring instrument 2 receives force only in the X-axis direction from the three or more adjustment units 144, and does not receive force in the Y-axis or Z-axis directions. In this way, by covering the measuring instrument body 20 having the outer curved surface 23 with the holder 50 having the flat side surface 55, the application of force to the optical measuring instrument 2 in an unintended direction is prevented.

[0088] Preferably, clamping the optical measuring device 2 with the support member set 17 includes adjusting the position of the support member set 17 so that the amount of force in the X-axis direction that the pins 33 and 34 receive from the optical measuring device 2 is kept below a second specified value. For example, the user may remove the screw 371 and determine whether the amount of force in the X-axis direction that the pin 34 attached to the handle 37 receives from the optical measuring device 2 is below the second specified value, based on the frictional force generated when the handle 37 is pulled out. Alternatively, the user may use a force gauge to measure the amount of force used when removing the pin 34. Alternatively, the user may attach a strain gauge to the pin 34 and measure the amount of force in the X-axis direction that the pin 34 receives from the optical measuring device 2, based on the distortion of the pin 34. The second specified value is determined in advance so that the optical measuring device 2 is not displaced by the force received from the support member set 17 when the third joint of the positioning member 30 is released from the opening 21 of the optical measuring device 2 in step S5, which will be described later.

[0089] The support mechanism includes, as a third support member, a support member set 18 whose position along the Z-axis direction is adjustable and which can hold an object therebetween. Therefore, step S4 includes adjusting the position of the support member set 18 so that it abuts against the optical measuring instrument 2, and holding the optical measuring instrument 2 with the support member set 18.

[0090] As described above, the support member set 18 includes three or more adjustment units 161 and the toggle clamp 151. Therefore, as shown in Fig. 6, clamping the optical measuring instrument 2 with the support member set 18 includes pressing the toggle clamp 151 against the optical measuring instrument 2. Furthermore, clamping the optical measuring instrument 2 with the support member set 18 includes adjusting the positions of the three or more adjustment units 161 so that they abut against the optical measuring instrument 2 (specifically, the lower surface 54) in a state in which the toggle clamp 151 is pressing against the optical measuring instrument 2.

[0091] As described above, the lower surface 54 is perpendicular to the Z-axis direction. Therefore, the optical measuring instrument 2 receives forces only in the Z-axis direction from the three or more adjustment units 161, and does not receive forces in the X-axis or Y-axis directions. In this way, by covering the measuring instrument body 20 having the outer curved surface 23 with the holder 50 having the flat lower surface 54, the application of forces to the optical measuring instrument 2 in unintended directions is prevented.

[0092] Preferably, clamping the optical measuring device 2 with the support member set 18 includes adjusting the position of the support member set 18 so that the amount of force in the Z-axis direction that the pin 33 receives from the optical measuring device 2 is kept below a third specified value. For example, the user may determine whether the amount of force in the Z-axis direction that the pin 33 attached to the handle 36 receives from the optical measuring device 2 is below the third specified value, based on the frictional force generated when removing the screw 361 and pulling out the handle 36. Alternatively, the user may use a force gauge to measure the amount of force used when removing the pin 33. Alternatively, the user may attach a strain gauge to the pin 33 and measure the amount of force in the Z-axis direction that the pin 33 receives from the optical measuring device 2, based on the strain of the pin 33. The third specified value is determined in advance so that the optical measuring device 2 is not displaced by the force received from the support member set 18 when the third joint of the positioning member 30 is released from the opening 21 of the optical measuring device 2 in step S5, which will be described later.

[0093] 13 , the installation method further includes step S5. Step S5 is a step of releasing the connection between the first joint 71 and the second joint 72 and releasing the connection between the third joint 73 and the opening 21 while the optical measuring instrument 2 is supported by the support mechanism. This separates the positioning member 30 from the installation table 10 and the optical measuring instrument 2.

[0094] The installation method further includes step S6. Step S6 is a step of installing the installation table 10 at a specific position on the base plate 6. Note that step S6 may be performed immediately after any of steps S1 to S4.

[0095] The base plate 6 has, for example, a structure for positioning the base plate 11 of the installation table 10, which includes multiple parallel pins that can be inserted into multiple holes provided in the base plate 11. Therefore, a user can simply install the installation table 10 on the base plate 6 using this structure. This determines a coordinate transformation matrix between a Cartesian coordinate system based on the installation table 10 and a Cartesian coordinate system based on the system origin 7. The computer 8 can use this coordinate transformation matrix to determine the position and orientation of the installation table 10 in the Cartesian coordinate system based on the system origin 7. The relative positional relationship between the installation table 10 and the opening 21 of the optical measuring device 2 is determined in advance based on the positions of the first joint 71, the second joint 72, the third joint 73, and the opening 21. Therefore, the computer 8 can determine the position and orientation of the opening 21 based on the relative positional relationship between the installation table 10 and the opening 21 of the optical measuring device 2.

[0096] <Modification> In the above description, each of the support member sets 17, 18 includes a combination of three or more adjustment members and a toggle clamp. However, one of the support member sets 17, 18 may include three or more adjustment members instead of a toggle clamp.

[0097] <Additional Notes> The above-described embodiment includes the following technical ideas.

[0098] [Configuration 1] An installation method for installing an optical measuring instrument on an installation stand using a positioning member, comprising: Joining a first joint portion provided on the positioning member to a second joint portion provided on the installation base; and joining a third joint provided on the positioning member to an opening provided on the optical measuring instrument for defining an optical path.

[0099] [Configuration 2] 2. The installation method of claim 1, wherein joining the first joint to the second joint is performed before joining the third joint to the opening.

[0100] [Configuration 3] 2. The installation method of claim 1, wherein joining the first joint to the second joint is performed after joining the third joint to the opening.

[0101] [Configuration 4] the third joint portion has a protruding portion that can be inserted into the opening and a first flat surface that is formed around the protruding portion, Joining the third joint portion to the opening Inserting the protrusion into the opening; The installation method according to any one of configurations 1 to 3, further comprising joining the first plane to a second plane around the opening of the optical measuring instrument.

[0102] [Configuration 5] The installation method according to any one of configurations 1 to 4, further comprising supporting the optical measuring instrument using a support mechanism provided on the installation table while the first joint is joined to the second joint and the third joint is joined to the opening.

[0103] [Configuration 6] the optical measuring instrument has a plane on which the opening is formed, The support mechanism includes: a first support member whose position along a first direction perpendicular to the plane is adjustable; a second support member whose position along a second direction perpendicular to the first direction is adjustable and which can hold an object therebetween; a third support member whose position along a third direction perpendicular to the first direction and the second direction is adjustable and which can hold an object therebetween; Supporting the optical measurement device comprises: adjusting a position of the first support member so that the first support member abuts against the optical measuring device; adjusting a position of the second support member so that the second support member abuts against the optical measuring instrument, and sandwiching the optical measuring instrument between the second support member; and adjusting the position of the third support member so that the third support member abuts against the optical measuring instrument, thereby sandwiching the optical measuring instrument between the third support member.

[0104] [Configuration 7] At least one of the second support member and the third support member is an adjustment unit whose position relative to the optical measuring device is adjustable; a pressing section that is located on the opposite side of the adjustment section with the optical measuring device in between and presses the optical measuring device toward the adjustment section, The holding of the optical measuring instrument by at least one of the second support member and the third support member includes: pressing the pressing portion against the optical measuring instrument; and adjusting the position of the adjustment unit so that the adjustment unit abuts against the optical measuring device while the pressing unit is pressing against the optical measuring device.

[0105] [Configuration 8] adjusting the position of the first support member includes adjusting the position of the first support member so that an amount of force in the first direction that the third joint receives from the optical measuring device is kept equal to or less than a first specified value; clamping the optical measuring device with the second support member includes adjusting a position of the second support member so that an amount of force in the second direction that the third joint receives from the optical measuring device is kept equal to or less than a second specified value; The installation method described in Configuration 6 or 7, wherein clamping the optical measuring instrument with the third support member includes adjusting the position of the third support member so that the amount of force in the third direction that the third joint receives from the optical measuring instrument is kept below a third specified value.

[0106] [Configuration 9] The optical measuring instrument is a body including the opening and having an outer curved surface; a holder attached to the main body so as to cover the outer curved surface, The holder has an outer flat surface; The installation method according to any one of configurations 5 to 8, wherein supporting the optical measuring instrument includes abutting the support mechanism against the outer flat surface.

[0107] [Configuration 10] The installation method described in any one of configurations 5 to 9, further comprising releasing the connection between the first joint and the second joint and releasing the connection between the third joint and the opening while the optical measuring instrument is supported by the support mechanism.

[0108] [Configuration 11] A jig set, An installation stand, a positioning member for assisting in installation of the optical measuring instrument on the installation table, the positioning member includes a first joint portion, and the first joint portion has a shape that allows it to be joined to a second joint portion provided on the installation base; the positioning member further includes a third joint portion, the third joint portion having a shape that can be joined to an opening portion that is provided in the optical measuring instrument and that defines an optical path; the installation base has a support mechanism that supports the optical measuring instrument so as to maintain a relative positional relationship between the installation base and the optical measuring instrument when the first joint portion is joined to the second joint portion and the third joint portion is joined to the opening.

[0109] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the above description, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0110] 1 Jig set, 2,200 Optical measuring instrument, 3 Robot, 4 Tray, 5 Sample, 6 Base plate, 7 System origin, 8 Computer, 10 Installation stand, 11 Base plate, 12 Stand plate, 13 Right side plate, 14 Left side plate, 15 Upper plate, 16 Lower plate, 17, 18 Support member set, 20 Measuring instrument body, 21, 210 Opening, 22 Flat surface, 23 Outer curved surface, 27 Light emitting element, 28 Light receiving element, 30 Positioning member, 31-34 Pin, 36, 37 Handle, 39 Plate, 40 Screw, 41 Guide, 50 Holder, 51, 52 Parts, 53 Upper surface, 54 Lower surface, 55, 391, 392 Side, 56 Rear surface, 61 Bolt, 62 Hexagon socket, 63 Nut, 64 Cap, 71 First joint, 72 Second joint, 73 Third joint, 100 Automatic measurement system, 121, 144, 161 Adjustment part, 131, 143 Screw hole, 133, 151 Toggle clamp, 141, 220 Hole, 142, 230 Slot, 211 First part, 212 Second part, 301 Base, 302 Arm, 303 End effector, 351, 352, 393, 394 Through hole, 361, 371 Screw, 381, 382 Main surface.

Claims

1. An installation method for installing an optical measuring instrument on an installation stand using a positioning member, comprising: Joining a first joint portion provided on the positioning member to a second joint portion provided on the installation base; and joining a third joint provided on the positioning member to an opening provided on the optical measuring instrument for defining an optical path.

2. The installation method of claim 1 , wherein joining the first joint to the second joint is performed before joining the third joint to the opening.

3. The installation method of claim 1 , wherein joining the first joint to the second joint is performed after joining the third joint to the opening.

4. the third joint portion has a protruding portion that can be inserted into the opening and a first flat surface that is formed around the protruding portion, Joining the third joint portion to the opening Inserting the protrusion into the opening; The installation method according to any one of claims 1 to 3, further comprising joining the first plane to a second plane around the opening in the optical measuring instrument.

5. 4. The installation method according to claim 1, further comprising supporting the optical measuring instrument using a support mechanism provided on the installation table in a state in which the first joint is joined to the second joint and the third joint is joined to the opening.

6. the optical measuring instrument has a plane on which the opening is formed, The support mechanism includes: a first support member whose position along a first direction perpendicular to the plane is adjustable; a second support member whose position along a second direction perpendicular to the first direction is adjustable and which can hold an object therebetween; a third support member whose position along a third direction perpendicular to the first direction and the second direction is adjustable and which can hold an object therebetween; Supporting the optical measurement device comprises: adjusting a position of the first support member so that the first support member abuts against the optical measuring device; adjusting a position of the second support member so that the second support member abuts against the optical measuring instrument, and sandwiching the optical measuring instrument between the second support members; The installation method according to claim 5 , further comprising: adjusting a position of the third support member so that the third support member abuts against the optical measuring device, and sandwiching the optical measuring device between the third support member.

7. At least one of the second support member and the third support member is an adjustment unit whose position relative to the optical measuring device is adjustable; a pressing section that is located on the opposite side of the adjustment section with the optical measuring device in between and presses the optical measuring device toward the adjustment section, The holding of the optical measuring instrument by at least one of the second support member and the third support member includes: pressing the pressing portion against the optical measuring instrument; The installation method according to claim 6 , further comprising: adjusting a position of the adjustment part so that the adjustment part abuts against the optical measuring instrument while the pressing part is pressing against the optical measuring instrument.

8. adjusting the position of the first support member includes adjusting the position of the first support member so that an amount of force in the first direction that the third joint receives from the optical measuring device is kept equal to or less than a first specified value; clamping the optical measuring device with the second support member includes adjusting a position of the second support member so that an amount of force in the second direction that the third joint receives from the optical measuring device is kept equal to or less than a second specified value; 7. The installation method according to claim 6, wherein clamping the optical measuring instrument with the third support member includes adjusting a position of the third support member so that an amount of force in the third direction that the third joint receives from the optical measuring instrument is kept below a third specified value.

9. The optical measuring instrument is a body including the opening and having an outer curved surface; a holder attached to the main body so as to cover the outer curved surface, The holder has an outer flat surface; The installation method according to claim 5 , wherein supporting the optical measuring instrument includes abutting the support mechanism against the outer flat surface.

10. 6. The installation method according to claim 5, further comprising releasing the connection between the first joint and the second joint and releasing the connection between the third joint and the opening while the optical measuring instrument is supported by the support mechanism.

11. A jig set, An installation stand, a positioning member for assisting in installation of the optical measuring instrument on the installation table, the positioning member includes a first joint portion, and the first joint portion has a shape that allows it to be joined to a second joint portion provided on the installation base; the positioning member further includes a third joint portion, the third joint portion having a shape that can be joined to an opening portion that is provided in the optical measuring instrument and that defines an optical path; the installation base has a support mechanism that supports the optical measuring instrument so as to maintain a relative positional relationship between the installation base and the optical measuring instrument when the first joint is joined to the second joint and the third joint is joined to the opening.

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