JP2019200220A - Measurement device - Google Patents

Abstract

To provide a measurement device capable of performing measurement of objects to be measured having various shapes and heights.SOLUTION: A measurement device includes: a measurement unit body 16; a moving body 24 provided on the measurement unit body 16 and movable along a moving shaft A; and a detector 22 detachably connected to a moving body 25 and having a stylus 18 capable of coming into contact with a measurement surface. The measurement unit body 16 can be reversed and the direction of the stylus 18 can be reversed with respect to the measurement unit body 16.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a roughness measuring machine, and more particularly to a roughness measuring machine that measures the surface roughness of a measurement object by bringing a stylus of a detector into contact with the surface of the measurement object.

  The main body (corresponding to the measuring unit main body) of the surface texture measuring instrument (corresponding to the roughness measuring instrument) disclosed in Patent Document 1 is a surface texture detecting sensor (corresponding to the detector) that detects the surface roughness of the object to be measured. And a drive means (corresponding to a drive unit) for moving the surface texture detection sensor. In addition, a stylus (corresponding to a stylus) that comes in contact with the surface of the object to be measured (also referred to as a measurement surface) is provided at the tip of the surface property detection sensor, and the stylus contacts the surface of the object to be measured. Then, the surface texture detection sensor is moved along the surface of the object to be measured, and the surface roughness of the object to be measured is measured by measuring the vertical displacement of the stylus at this time.

  Further, Patent Document 2 includes a measurement unit and a data processing unit, and a surface roughness measuring device (corresponding to a roughness measuring machine) formed by electrically connecting the measuring unit and the data processing unit via a cable. Is disclosed. In the measurement unit of Patent Document 2, a pickup (corresponding to a detector) is provided in a box-shaped housing (corresponding to the measurement unit main body), and a stylus is provided at the tip of the pickup. The pickup is moved in the axial direction by a drive mechanism (corresponding to a drive unit) built in the housing. Based on the displacement data of the stylus at this time, the data processing unit performs signal processing to measure the surface roughness.

Japanese Patent No. 3443050 JP 2013-7586 A

  In a conventional roughness measuring machine, when measuring objects to be measured having different heights, for example, a height adjusting unit for adjusting the height of the detector is provided in the measuring unit main body, and the height adjusting unit It is conceivable to adjust the height to the height of the measurement object. However, since there is a limit on the upper limit height of the detector adjusted by the height adjusting unit, it is not possible to measure an object to be measured that is higher than the upper limit height.

  Further, in the conventional roughness measuring machine, the roughness of the surface located on the upper surface of the object to be measured can be measured, for example, by the measuring part main body. It is difficult to measure the roughness of an object having various shapes such as the roughness of the inner peripheral surface of the part or the roughness of the ceiling surface of the object to be measured with one measuring unit main body.

  This invention is made | formed in view of such a situation, and it aims at providing the roughness measuring machine which can perform roughness measurement with respect to the to-be-measured object of various shapes and height.

  In order to achieve the object of the present invention, the present invention provides a first posture in which the first surface faces one side in the first direction and a second surface opposite to the first surface on one side in the first direction. A measuring unit main body that can be reversed between the second posture toward the mobile unit, a moving body that is provided in the measuring unit main body and is movable in a second direction orthogonal to the first direction, and a driving unit that moves the moving body. A detector holder provided on the moving body, a detector that is held by the detector holder and detects the surface roughness of the object to be measured, and a object to be measured disposed on the first surface side or the second surface side. There is provided a roughness measuring machine including a height adjusting unit that adjusts the height of a detector with respect to a surface, and a switching unit that switches a direction of the detector between a first surface side and a second surface side.

  According to the roughness measuring instrument of the present invention, the posture of the measurement unit main body is changed to the first posture or the second posture according to the height of the measurement target and the shape of the measurement surface, and the measurement target with respect to the measurement unit main body. The direction of the detector can be switched between the first side surface and the second side surface according to the position of the measurement surface. Moreover, since the height of the detector with respect to the measurement surface of the object to be measured can also be adjusted by the height adjusting unit, the roughness can be measured even when the height of the surface that is the measurement surface of the object to be measured is different. Therefore, according to the present invention, it is possible to perform roughness measurement on objects to be measured having various shapes and heights.

  In one aspect of the present invention, it is preferable that the first surface and the second surface of the measurement unit main body are provided with an angle adjustment unit that adjusts the inclination of the measurement unit main body with respect to the object to be measured.

  According to one aspect of the present invention, the angle adjustment unit adjusts the inclination of the measurement unit main body with respect to the object to be measured regardless of whether the measurement is performed on the first surface side or the second side surface side. can do.

  In one embodiment of the present invention, the measurement unit main body is provided with a pair of guide portions that are opposed to each other with the moving body interposed therebetween and guide the moving body along the second direction while restricting movement of the moving body in the first direction. Preferably it is.

  According to one aspect of the present invention, even if the relative measurement posture of the measurement unit body with respect to the object to be measured is changed, the movement unit is restricted from moving in the first direction by the pair of guide units. Blur that occurs when moving parts can be suppressed. Therefore, even if the relative measurement posture of the measurement unit main body with respect to the object to be measured is changed, the detector moves reliably along the first direction, so that the measurement accuracy can be maintained.

  In one embodiment of the present invention, the detector is rotatably held around the first direction with respect to the detector holder. One of the detector and the detector holder is an engaging portion, and the other is an engaged portion. And when the detector is rotated with respect to the detector holder, the switching portion engages the engaging portion and the engaged portion to thereby change the orientation of the detector to the first surface side or the first side. It is preferable that the orientation of the detector is switched between the first surface side and the second surface side by positioning on either one of the two surface sides.

  According to one embodiment of the present invention, the detector can be easily positioned on the first surface side or the second surface side.

  In one aspect of the present invention, it is preferable that the angle adjustment unit includes a leg portion that can freely protrude from the first surface and the second surface of the measurement unit main body, and an adjustment unit that adjusts the protrusion amount of the leg portion.

  According to one aspect of the present invention, the inclination of the measurement unit main body with respect to the object to be measured can be adjusted by operating the adjustment unit to adjust the protruding amount of the leg.

  According to the roughness measuring machine of the present invention, it is possible to perform roughness measurement on objects to be measured having various shapes and heights.

1 is an external view showing the overall configuration of a roughness measuring machine according to an embodiment of the present invention. Overall perspective view of the measuring section shown in FIG. FIG. 1 is an assembled perspective view of the measuring unit shown in FIG. Schematic configuration diagram of the detector Explanatory drawing which showed the measurement form where the leg was placed on the measuring table Explanatory drawing which showed the measurement form with the object to be measured directly placed on the leg Sectional view showing the connection structure between the detector and the moving part Sectional view showing sliding structure of moving part with respect to guide rail A perspective view of the skeleton showing the main guide and sub guide of the moving body (A) is the perspective view which showed the sliding structure of the main guide and sub guide with respect to a moving body, (B) is sectional drawing of the sliding structure of (A). The perspective view of the measurement part which showed the 3rd measurement form The perspective view which showed the attitude | position of the measurement part in a 3rd measurement form

  Hereinafter, preferred embodiments of a roughness measuring machine according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an external view showing an overall configuration of a roughness measuring machine 10 according to an embodiment of the present invention. As shown in FIG. 1, the roughness measuring machine 10 according to the embodiment includes a measurement unit 12 and a data processing unit 14.

[Measurement unit 12]
FIG. 2 is an overall perspective view of the measurement unit 12. FIG. 3 is an assembled perspective view of the measurement unit 12. FIG. 4 is a schematic configuration diagram of the detector 22.

  2 to 4, the measurement unit 12 is disposed on the measurement unit main body 16, the measurement unit main body 16, and the displacement of the stylus 18 that contacts the surface of the object to be measured and the displacement of the stylus 18. A detector 22 having a quantity measuring unit 20, a moving body 24 disposed on the measuring unit main body 16 and connected to the detector 22, and a detector 22 disposed on the measuring unit main body 16 via the moving body 24. And a drive unit 26 that moves along a movement axis A indicated by a one-dot chain line.

  Here, the movement axis A refers to the central axis in the longitudinal direction of the detector 22 configured in a cylindrical shape in appearance. According to the roughness measuring instrument 10 of the embodiment, when the detector 22 is moved along the movement axis A, the stylus 18 traces the surface of the object to be measured and measures the surface roughness of the object to be measured. To do. Further, the moving direction of the detector 22 moving along the moving axis A corresponds to the second direction.

<Measurement unit body 16>
The measuring unit main body 16 is configured in a rectangular parallelepiped box shape in appearance. The measurement unit main body 16 includes a rectangular tube-shaped outer case 28 and a skeleton part 30 covered with the outer case 28. The detector 22, the moving body 24, the drive unit 26, and the like are arranged at predetermined positions of the skeleton unit 30 to constitute the main part of the measurement unit 12.

  A pair of fixed leg portions 32 and a movable leg portion 34 constituting the angle adjusting portion 70 are disposed on one side surface 28A of two opposing side surfaces of the outer case 28. These leg parts 32 and 34 are spaced apart in the longitudinal direction of the outer case 28. Similarly, a fixed plate-like leg portion 36 and a movable leg portion 38 constituting the angle adjusting portion 70 are also arranged on the other side surface 28B of the two opposite side surfaces of the outer case 28. Similarly, these leg portions 36 and 38 are spaced apart from each other in the longitudinal direction of the outer case 28. Here, the side surface 28A corresponds to the first surface, and the side surface 28B opposite to the side surface 28A corresponds to the second surface.

  These leg portions 32 to 38 are used to measure the surface roughness of the measurement object by changing the relative measurement posture of the measurement unit main body 16 with respect to the measurement object. Or the object to be measured is directly placed.

  Explaining based on the drawings, FIG. 5 shows the surface roughness of the rectangular parallelepiped object W1 placed on the measuring table 100, with the leg portions 32 and 34 mounted on the measuring table 100 with the side surface 28A as the lower surface. It is explanatory drawing which showed the 1st measurement form which measures this. That is, in FIG. 5, the measurement unit main body 16 is directed to the lower side (one side) in the arrow B direction (first direction) orthogonal to the movement axis A (second direction). The first posture is shown.

  On the other hand, FIG. 6 shows that the measuring unit 12 is changed to an upside-down posture, and the columnar workpiece W2 is directly placed on the side surface 28A and the leg 34 which are the upper surface, and the surface roughness of the workpiece W2 is reduced. It is explanatory drawing which showed the 2nd measurement form to measure. That is, FIG. 6 shows the second posture of the measurement unit main body 16 with the side surface 28B, which is the second surface, facing downward (one side) in the direction of the arrow B (first direction). 5 is reversed with respect to the first posture.

  The second measurement mode is a mode in which the plate 102 having the groove 102A having a V-shaped cross section is fixed to the side surface 28A, and the workpiece W2 is placed in the groove 102A.

  Prior to the roughness measurement, the movable leg 34 is adjusted in the amount of protrusion from the side surface 28A so that the movement axis A of the detector 22 and the surface of the workpiece W1 are relatively parallel to each other.

  More specifically, in the first measurement mode of FIG. 5, if the protruding amount of the leg 34 from the side surface 28 </ b> A is adjusted, the measurement unit main body 16 is inclined with respect to the measurement table 100. The moving axis A can be adjusted in parallel to the surface of the workpiece W1.

  At this time, in the first measurement form of FIG. 5, the fixed leg portion 32 is used as a fulcrum portion for adjusting the movement axis A in parallel to the surface of the object to be measured W1. By using the leg portion 32 protruding from the side surface 28A as a fulcrum portion, the adjustment of the movement axis A is facilitated.

  In the second measurement configuration of FIG. 6, when the leg portion 32 interferes with the workpiece W <b> 2, it is preferable that the leg portion 32 is tilted and housed inside the outer case 28. As will be described later, the movement axis A of the detector 22 can be adjusted parallel to the surface of the object to be measured by adjusting the amount of protrusion of the movable leg 38 from the side surface 28B. The angle adjusting unit 70 including the movable legs 34 and 38 will be described later. Further, in the first measurement form of FIG. 5 and the second measurement form of FIG. 6, the measurement direction (described later) of the stylus 18 faces the normal direction of the side surface 28A, but the normal direction of the side surface 28B. The measuring direction of the stylus 18 can also be directed to. This point will also be described later.

<Detector 22>
2 to 4, the detector 22 includes an arm 40 whose longitudinal direction is disposed along the movement axis A. The proximal end portion of the stylus 18 is fixed to the distal end portion of the arm 40. The stylus 18 is fixed so that its longitudinal direction is perpendicular to the longitudinal direction of the arm 40. Here, the longitudinal direction from the proximal end portion to the distal end portion of the stylus 18 is the measurement direction of the stylus 18 described above, and the measurement direction of the stylus 18 corresponds to the direction of the detector 22. Further, a contact 42 made of, for example, diamond is attached to the distal end portion of the stylus 18, and this contact 42 is substantially in contact with the surface (measurement surface) of the object to be measured. Here, in the longitudinal direction of the measurement unit main body 16, a portion provided with the detector 22 is referred to as a distal end portion 16 </ b> A of the measurement unit main body 16, and a portion opposite to the distal end portion 16 </ b> A is a proximal end of the measurement unit main body 16. This will be referred to as part 16B.

  As shown in FIG. 4, the base end side of the arm 40 is inserted into the detector 22 and is supported in the detector 22 so as to be swingable in the vertical direction as indicated by an arrow C by a fulcrum 40A. Further, a core 20A is attached to the base end portion of the arm 40, and the amount of swing of the arm 40 in the vertical direction, that is, the amount to be covered is measured by the displacement measuring unit 20 such as a differential transformer composed of the core 20A and the bobbin 20B. The amount of displacement of the stylus 18 that is displaced up and down when tracing the surface of the measurement object is measured. Specifically, the displacement amount of the stylus 18 is converted into a voltage by the displacement amount measuring unit 20, and this voltage value is output to the data processing unit 14 (see FIG. 1). The voltage value is A / D converted by an A / D converter built in the data processing unit 14. Then, the data processing unit 14 processes the A / D converted digital signal and digitizes the surface roughness. In addition, since the detailed structure of the detector 22 is known, the description is abbreviate | omitted here.

<Moving object 24>
As shown in FIG. 3, the moving body 24 is connected to the proximal end portion of the detector 22.

  FIG. 7 is a cross-sectional view exaggeratingly illustrating the connection structure between the detector 22 and the moving body 24. According to FIG. 7, the proximal end portion of the detector 22 is fitted into the hole portion 46 of the holder portion (detector holder) 44 provided at the distal end portion of the moving body 24, and the moving shaft is moved with respect to the hole portion 46. It is provided so as to be rotatable in the direction of arrow D around A. A hemispherical convex portion (engaging portion) 48 is provided on the inner peripheral surface of the hole portion 46. The convex part 48 is arrange | positioned at the side surface 28A side. In addition, a pair of concave portions (engaged portions) 50 </ b> A and 50 </ b> B that engage with the convex portion 48 are provided at the base end portion of the detector 22 with an interval of 180 °.

  The detector 22 is rotated about the movement axis A with respect to the hole 46, and the concave portion 50 </ b> B is engaged with the convex portion 48. Thereby, the orientation of the detector 22 is switched to the side surface 28A side of the outer case 28 and positioned. On the other hand, when the detector 22 is rotated 180 ° with respect to the hole 46 from this state and the concave portion 50A is engaged with the convex portion 48, the orientation of the detector 22 is changed to the side surface 28B side of the outer case 28. Switched and positioned. That is, the direction of the detector 22 is switched between the side surface 28A side and the side surface 28B side by the switching unit including the convex portion 48 and the concave portions 50A and 50B.

  Returning to FIG. 3, the moving body 24 includes a main body 52 having a holder portion 44, a feed nut 54 fixed to a side surface of the main body 52, and an inside of the main body 52. And a height adjustment unit 55 that adjusts the height of the detector 22 in the vertical direction by moving it vertically in the E direction. The feed nut 54 is screwed to a feed screw 56 constituting the drive unit 26. That is, the detector 22 is reciprocated along the movement axis A in a predetermined measurement range via the moving body 24 by rotating the feed screw 56 forward and backward by the motor 58 constituting the drive unit 26. That is, the detector 22 is reciprocated between a predetermined “measurement start position” and a predetermined “measurement end position”.

  By the way, the height adjustment unit 55 moves the detector 22 up and down in the direction of arrow E together with the holder unit 44 by a feed screw or the like, and detects the surface of the object to be measured arranged on the side surface 28A side or side surface 28B side. Although it is an adjustment part which adjusts the height of 22, the up-and-down moving range is restricted to a narrow range of several centimeters. That is, in the first measurement mode shown in FIG. 5, the detector 22 is moved up and down by the height adjustment unit 55 in accordance with the height dimension H1 of the object to be measured W1, but the height dimension of the object to be measured W1. When H1 exceeds the vertical movement range of the detector 22, there arises a problem that the surface roughness of the workpiece W1 cannot be measured in the first measurement form.

  Therefore, in the roughness measuring machine 10 according to the embodiment, the measurement unit 12 can be used in an upside-down posture, and the detector 22 is provided to be rotatable with respect to the holder unit 44 as described above. The problem has been solved. This point will also be described later.

<Drive unit 26>
As shown in FIG. 3, the drive unit 26 includes a feed screw 56 and a motor 58. The drive unit 26 includes a guide mechanism unit 60 that is slidably contacted with the moving body 24 and guides the moving body 24 in a second direction along the moving axis A.

  The motor 58 is fixed to the skeleton 30 so that a rotation shaft (not shown) is parallel to the movement axis A, and a proximal end portion of the feed screw 56 is fixed to a distal end portion of the rotation shaft. The leading end of the feed screw 56 is rotatably supported by a bearing (not shown), and is fixed to the skeleton 30 via this bearing, whereby the longitudinal direction of the feed screw 56 is arranged in parallel with the movement axis A. Is done.

<< Guide mechanism 60 >>
The guide mechanism section 60 is disposed along the movement axis A, and has a pair of guide rails (guide sections) 62 and 62 disposed to face each other with the moving body 24 sandwiched from the left-right direction of the moving body 24. The guide rails 62, 62 are fixed to the skeleton part 30 or constitute a part of the skeleton part 30, and V-shaped grooves 64 along the movement axis A are provided on the inner surfaces facing each other. The groove 64 may be U-shaped.

  FIG. 8 is a sectional view showing a sliding structure of the moving body 24 with respect to the guide rails 62 and 62. In the grooves 64 of the guide rails 62 and 62, a plurality of convex portions 66 (two on each side surface in the embodiment) provided on the left and right side surfaces of the main body 52 of the moving body 24 are slidably fitted. Combined. In addition, one convex portion 66 </ b> A that comes into contact with the wall surfaces of the guide rails 62 and 62 is provided on both the left and right side surfaces of the main body 52 of the moving body 24. As a result, the moving body 24 is moved along the moving axis A in the reciprocating movement in the measurement range without dropping from the guide rails 62 and 62 and without being shaken (pitching, yawing, rolling) during movement. . That is, the moving body 24 is moved along the movement axis A that is the second direction while the movement in the arrow B direction (first direction) is restricted by the pair of guide rails 62 and 62.

  FIG. 9 is a perspective view of the skeleton 30 showing the main guide 90 and the sub guide 92 that guide the moving body 24. 10A is a perspective view showing a sliding structure of the main guide 90 and the sub guide 92 with respect to the moving body 24, and FIG. 10B is a sectional view of the sliding structure of FIG. .

  As shown in FIGS. 9 and 10, the guide mechanism unit 60 according to the embodiment is arranged along the movement axis A, and has a rod-shaped main guide 90 penetrating the moving body 24 and the axis of the main guide 90 as the center. It has a rod-shaped sub-guide 92 that restricts the movement of the moving body 24 in the rotational direction. The main guide 90 and the sub guide 92 are fixed to the skeleton 30.

  By inserting the main guide 90 through the through hole 24A of the moving body 24, the moving body 24 and the main guide 90 are slidably fitted, and the sub guide 92 is a leaf spring at the side step portion 24B of the moving body 24. The shaft blurring of the moving body 24 is regulated by being pressed and held via 94. As a result, the moving body 24 is moved along the moving axis A without being dropped from the sub guide 92 or being shaken (pitching, yawing, rolling) during the reciprocating movement in the measurement range. That is, the moving body 24 is moved along the movement axis A that is the second direction while the movement in the arrow B direction (first direction) is restricted by the main guide 90 and the sub guide 92.

  In the embodiment, as described above, the guide mechanism unit 60 is configured in such a manner that the moving body 24 is sandwiched between the pair of guide rails 62 and 62. On the other hand, in a conventional measuring unit that measures roughness in a uniquely determined posture, it is not necessary to hold the moving body 24 between the pair of guide rails 62, 62, and only one guide rail 62 is provided. Thus, the movable body 24 may be supported movably. In other words, the lower portion of the moving body 24 may be supported by the single guide rail 62 so that the moving body 24 does not fall off from the single guide rail 62 or cause shaft blurring during movement. .

  On the other hand, when only one guide rail 62 is used in the measurement unit 12 of the embodiment that measures the surface roughness of the measurement object by changing the relative measurement posture of the measurement unit main body 16 with respect to the measurement object. In this case, when the measuring posture of the measuring unit 12 is changed to, for example, upside down, the moving body 24 may fall off from one guide rail 62, so that the function as a roughness measuring machine is lost.

  On the other hand, the guide mechanism unit 60 according to the embodiment holds the moving body 24 between the pair of guide rails 62 and 62 so that the moving body 24 is paired even if the measurement posture of the measuring unit 12 is changed upside down. The guide rails 62 and 62 are prevented from falling off or causing shaft blurring during movement. Thereby, in the first measurement form shown in FIG. 5, even when the height dimension H1 of the object to be measured W1 exceeds the vertical movement range of the detector 22, the measurement unit 12 is changed to the upside down posture. Since the measurement can be performed and the orientation of the detector 22 with respect to the holder portion 44 can be switched between the side surface 28A side and the side surface 28B side, the function as a roughness measuring machine can be secured.

  The pair of guide rails 62 and 62 of the guide mechanism unit 60 of the embodiment are configured to sandwich the moving body 24 from the left and right direction, but may be configured to be sandwiched from the up and down direction, and from both the left and right direction and the up and down direction. It may be in the form of pinching.

<Angle adjustment unit 70>
The angle adjustment unit 70 includes leg portions 34 and 38 that can project from the two side surfaces 28A and 28B of the exterior case 28 of the measurement unit main body 16, and an adjustment unit 68 that adjusts the protruding amount of the leg portions 34 and 38. .

  The leg portions 34 and 38 are screw rods integrated in the axial direction, and the adjustment portion 68 is a nut portion screwed into the screw rods which are the leg portions 34 and 38. Further, the screw rods that are the leg portions 34 and 38 are disposed through the exterior case 28. Furthermore, the adjustment part 68 is comprised by disk shape, and the screw rod which is the leg parts 34 and 38 is screwed together by the internal thread part formed in the center part. The adjustment unit 68 is disposed outside the outer case 28 so as to be manually operated.

  According to the angle adjustment unit 70, the amount of protrusion of the legs 34 and 38 protruding from the two side surfaces 28A and 28B of the outer case 28 can be adjusted by rotating the adjustment unit 68 forward and backward. The moving axis A of the detector 22 is adjusted parallel to the surface of the object to be measured.

[Data processing unit 14]
As shown in FIG. 1, the data processing unit 14 includes a box-shaped main body 72. The main body 72 includes a connector 74 at the top, and the connector 74 and the connector 78 of the measurement unit main body 16 are connected via a cable 76 indicated by a broken line, whereby the measurement unit 12 and the data processing unit 14 are connected. Electrically connected.

  Further, a display unit 80 that displays various information, an operation panel 82 that performs various operations, and the like are provided on the front surface of the main body 72. Furthermore, a power switch 84 and a connector 86 are provided on one side surface of the main body 72. The connector 86 includes a communication connector 86A that is connected to an external device such as a personal computer, and a memory connector 86B that is connected to an external storage medium such as a USB memory.

  The data processing unit 14 can transmit measurement data to an external device by connecting the communication connector 86A to the external device via a cable. In addition, required data can be received from an external device. The communication connector 86A can be constituted by a USB connector, for example, and performs communication according to the USB standard. Further, the data processing unit 14 can record the measured data, for example, in the external storage medium by connecting the external storage medium to the memory connector 86B. The memory connector 86B can be constituted by a USB connector, for example, and a USB memory can be used as an external storage medium. Furthermore, the upper surface of the main body 72 is provided with a paper discharge port 88 through which the paper on which the measurement result is printed is discharged.

〔Measuring method〕
<Measurement method in the first measurement mode and the second measurement mode>
A measurement method in the first measurement mode of FIG. 5 and the second measurement mode of FIG. 6 will be described using the roughness measuring instrument 10 of the embodiment.

  First, measurement conditions are set. Specifically, the evaluation length and the moving speed of the detector 22 are set. This setting is performed using the operation panel 82 of the data processing unit 14 shown in FIG. The set information is displayed on the display 80, and the drive unit 26 is controlled by the data processing unit 14 during measurement based on the set information.

<< First measurement form >>
First, the measurement unit 12 is set. That is, the legs 32 and 34 are placed on the measurement table 100 with the side surface 28A of the measurement unit 12 as the lower surface. Then, the detector 22 is rotated with respect to the holder portion 44 as necessary, and the measurement direction of the stylus 18 is directed to the normal direction of the side surface 28A. Then, the workpiece W1 is placed on the measurement table 100, and the height of the detector 22 with respect to the surface of the workpiece W1 is adjusted by the height adjusting unit 55.

  Next, after the contact 42 of the stylus 18 is brought into contact with the surface of the object to be measured W1, the moving axis A of the detector 22 is parallel to the surface of the object to be measured W1 by using the angle adjusting unit 70. The amount of protrusion of the movable leg 34 from the side surface 28A is adjusted so that Specifically, the adjustment portion 68 is rotated to adjust the protruding amount of the leg portion 34 protruding from the side surface 28A of the exterior case 28.

  Next, the execution of measurement is instructed via the operation panel 82 of the data processing unit 14.

  When the execution of measurement is instructed from the operation panel 82, the detector 22 moves at a constant moving speed along the movement axis A, and at a constant distance in the direction from the distal end portion 16A to the proximal end portion 16B of the measurement unit main body 16. Moving. At that time, displacement data of the stylus 18 is acquired by the displacement measuring unit 20.

  The displacement data of the stylus 18 is taken into the data processing unit 14 as an analog electric signal. The data processing unit 14 converts the electrical signal received from the detector 22 into a digital electrical signal at a constant sampling period. Then, the surface roughness is measured by processing the digital signal according to a predetermined control program.

  The measurement result is output to the display 80, and is also output as numerical data and displayed as a graph as necessary. The above is the measurement method according to the first measurement form.

<< Second measurement form >>
First, the measurement unit 12 is set. That is, as shown in FIG. 6, the workpiece W2 is directly placed in the groove 102A of the plate 102 with the side surface 28A of the measuring unit 12 as the upper surface. Then, after confirming that the measurement direction of the stylus 18 is in the normal direction of the side surface 28A, the height of the detector 22 relative to the measurement surface of the workpiece W2 is adjusted by the height adjustment unit 55.

  Next, the execution of measurement is instructed via the operation panel 82 of the data processing unit 14. Since the following operations are the same as those in the first measurement mode, description thereof is omitted.

<< Third measurement mode >>
In the first measurement mode shown in FIG. 5, a third measurement mode when the height H1 of the workpiece W1 exceeds the vertical movement range of the detector 22 by the height adjusting unit 55 will be described. .

  FIG. 11 is a perspective view illustrating the posture of the measurement unit 12 in the third measurement mode, and FIG. 12 is a perspective view of the measurement unit illustrating the third measurement mode.

  As shown in FIG. 11, the measurement unit main body 16 measures the surface roughness of the measurement object W3 having a dimension H3 higher than the height dimension H1 (see FIG. 5) of the measurement object W1. The measurement posture of the main body 16 is changed from the upside down posture. That is, the legs 36 and 38 are placed on the measuring table 100 with the side surface 28B of the outer case 28 as the lower surface. By reversing the measurement unit body 16 from the measurement posture of FIG. 5 to the measurement posture of FIG. 11, the height of the detector 22 from the side surface 28B becomes higher than the height from the side surface 28A in the measurement posture of FIG. Without changing the movement range of the detector 22 by the height adjusting unit 55, it is possible to measure the roughness of the workpiece W3 having a height that could not be measured in the measurement posture of FIG.

  Thereafter, as shown in FIG. 12, the position of the rotation direction indicated by the arrow D of the detector 22 with respect to the holder portion 44 is changed by 180 ° to switch the measurement direction of the stylus 18 to the normal direction of the side surface 28B. The vertical position indicated by the arrow E of the detector 22 is adjusted by the height adjusting unit 55.

  Thereby, in the first measurement mode of FIG. 5, it was impossible to bring the stylus 18 into contact with the surface of the workpiece W3, but the measurement posture of the measurement unit 12 was changed to the upside down posture, and By changing the direction of the detector 22 by 180 °, the stylus 18 can be brought into contact with the surface of the workpiece W3 as shown in FIG. Therefore, the surface roughness of the workpiece W3 can be measured. That is, the roughness of the workpieces W1 and W3 having different heights can be measured by the single roughness measuring device 10.

  Further, at the time of this measurement, the guide mechanism unit 60 of the embodiment is configured such that the movable body 24 is dropped or moved from the pair of guide rails 62, 62 because the movable body 24 is sandwiched between the pair of guide rails 62, 62. Occasional shaft blurring is prevented. Thereby, the function as the roughness measuring machine 10 is ensured.

  In the first measurement configuration of FIG. 5 and the third measurement configuration of FIG. 11, the orientation of the detector 22 is switched between the side surface 28 </ b> A side and the side surface 28 </ b> B side, thereby roughening the ceiling surface of the object to be measured. The roughness of the object to be measured having various shapes such as the roughness of the inner peripheral surface of the hole of the object to be measured can be measured.

  As described above, according to the roughness measuring instrument 10 of the embodiment, the object W1 to be measured using the two side surfaces 28A and 28B provided with the angle adjustment unit 70 among the plurality of side surfaces of the measurement unit main body 16. The surface roughness of W2 is measured. Prior to the roughness measurement, the height of the detector 22 is adjusted by the height adjusting unit 55, and the detector 22 is rotated with respect to the holder unit 44 so that the detector 22 is oriented in a direction corresponding to the measurement posture. Turn. Thereby, according to the roughness measuring instrument 10 of the embodiment, the surface roughness of the measurement objects W1 and W2 is measured by changing the relative measurement posture of the measurement unit main body 16 with respect to the measurement objects W1 and W2. Can do.

  Further, even if the measurement posture of the measurement unit 12 is changed to the upside down posture as shown in FIG. 11, the moving body 24 is sandwiched from both sides by the pair of guide rails 62, 62, and thus occurs when the moving body 24 moves. Blur can be suppressed. Therefore, even if the relative measurement posture of the measurement unit main body 16 with respect to the object to be measured W1 is changed, the detector 22 moves along the movement axis A, so that it is possible to perform normal and highly accurate roughness measurement. .

  As described above, according to the roughness measuring instrument 10 of the embodiment, it is possible to perform roughness measurement on the objects to be measured having various heights and the measurement surfaces having various shapes.

  In addition, it is preferable to automatically recognize the orientation of the detector 22 by mounting a switch or a sensor that automates the height adjustment of the detector 22 and detects the measurement posture of the measurement unit 12 on the measurement unit 12.

  DESCRIPTION OF SYMBOLS 10 ... Roughness measuring machine, 12 ... Measuring part, 14 ... Data processing part, 16 ... Measuring part main body, 18 ... Stylus, 20 ... Displacement measuring part, 22 ... Detector, 24 ... Moving body, 26 ... Drive part , 28 ... exterior case, 30 ... skeleton part, 32, 34, 36, 38 ... leg part, 40 ... arm, 42 ... contact, 44 ... holder part, 46 ... hole part, 48 ... convex part, 50A, 50B ... concave part , 52 ... Main body, 54 ... Feed nut, 55 ... Height adjustment part, 56 ... Feed screw, 58 ... Motor, 60 ... Guide mechanism part, 62 ... Guide rail, 64 ... Groove, 66 ... Convex part, 68 ... Adjustment , 70 ... Angle adjustment part, 72 ... Main body part, 74 ... Connector, 76 ... Cable, 78 ... Connector, 80 ... Display, 82 ... Operation panel, 84 ... Power switch, 86 ... Connector, 88 ... Paper discharge port, 90 ... Main guide, 92 ... Sub guide, 94 Leaf spring, 100 ... measuring stand, 102 ... plate

Claims (4)

A measurement unit body;
A movable body provided in the measurement unit main body and movable along a movement axis;
A detector detachably connected to the moving body and having a stylus capable of contacting the surface to be measured;
With
A measuring apparatus configured to be capable of reversing the measurement unit body and reversing the direction of the stylus with respect to the measurement unit body.   The measurement apparatus according to claim 1, further comprising a height adjustment unit that adjusts a relative height position of the detector with respect to the measurement surface.   The measurement apparatus according to claim 1, further comprising an angle adjustment unit that adjusts an inclination of the measurement unit main body with respect to the measurement target surface. The said angle adjustment part is a measuring apparatus of Claim 3 provided with the protrusion part which can protrude from the said measurement part main body, and the adjustment part which adjusts the protrusion amount of the said protrusion part.

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