JP6180238B2 - measuring device - Google Patents

Description

  The present invention relates to a measuring apparatus.

How close the processed circle (outer surface or inner surface) is to a perfect circle in parts manufactured for the purpose of processing into a circular shape so that it is as close as possible to the perfect circle, such as the outer surface or inner surface of a pipe Concentricity is known as an index indicating
The concentricity is generally defined as the size of the error (positional deviation) of the center of the target circle (for example, the actually measured circle shape) with respect to the center of the reference circle (datum circle). This point is also defined in the JIS standard number (B0021) of the Japanese Industrial Standard (JIS).

  By the way, a ferrule is known as one of the components described above. This ferrule is a member for connecting optical fibers while accurately aligning the end faces of the cores of the optical fibers. And this ferrule is formed in the cylindrical shape by which the through-hole was formed along the center axis | shaft, and it mounts | wears with an optical connector component in the state which penetrated the core wire of the optical fiber in the through-hole. Therefore, in order to connect the optical fibers while accurately aligning the end faces of the core wires, the accuracy of the concentricity of the ferrule is particularly required at a high level.

  Conventionally, as a device for measuring the concentricity of a ferrule, it has a measuring table on which the ferrule is rotatably mounted and a plurality of suction parts for sucking the ferrule, and the ferrule is sucked to the suction part and swiveled in the horizontal direction. Thus, there is known a measuring apparatus that includes an arm that supplies a ferrule to a measuring table and discharges the ferrule from the measuring table, and a belt that rotates a ferrule placed on the measuring table (see, for example, Patent Document 1). ).

  The belt is installed on a plurality of pulleys provided on the plate. The plate has an up and down Linder portion and is configured to move in the up and down direction. The belt is brought into contact with the peripheral surface of the ferrule by lowering the plate onto the measuring table by the upper and lower cylinder portions. Then, after aligning the center position of the through-hole calculated from the captured image with the center of the image, the image is captured at every predetermined rotation angle while rotating the ferrule, and the center position and the image center of each through-hole calculated from each captured image The degree of concentricity is measured by obtaining the amount of eccentricity based on the deviation from the position and the deviation of the distance between the reference member and the outer peripheral surface of the ferrule.

Japanese Patent No. 2992545

  However, in the prior art, since the plate is moved up and down by the upper and lower cylinder portions to bring the belt close to and away from the peripheral surface of the ferrule, the mechanism of the measuring apparatus is generally complicated and expensive.

  Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide a measuring apparatus capable of moving a rotating body with a low-cost and simple mechanism.

  In order to solve the above-described problems, the measuring device of the present invention is rotated by the power of the drive unit, and rotates the rotating body that is in contact with the outer surface of the object to be measured, and rotates the rotating body around a rotation axis. A switching mechanism that switches between a measurement position for bringing a body into contact with the outer surface of the measurement object and a retreat position for retracting the rotating body from the measurement position, and performing a predetermined measurement according to the rotation state of the measurement object It is characterized by acquiring a value.

  According to the present invention, the switching mechanism is configured to switch between a measurement position where the rotating body is rotated about the rotation axis and the rotating body is brought into contact with the outer surface of the measurement object, and a retreat position where the rotating body is retracted from the measurement position. Therefore, the measurement position and the avoidance position can be switched by manually rotating the rotating body around the rotation axis, for example. Thereby, unlike a prior art, a rotary body can be moved by a low-cost and simple switching mechanism, without providing complicated mechanisms, such as a cylinder, for example.

  Further, the drive unit is a motor, and the rotation shaft is provided so as to be coaxial with a rotation center axis of the motor.

  According to the present invention, since the rotation shaft of the rotating body is provided so as to be coaxial with the rotation center axis of the motor, it is possible to rotate the motor, which is a heavy object, around the rotation shaft with a small force. The rotating body can be moved. Therefore, the operator can easily move the rotating body.

  The rotating body is an endless belt spanned between a driving pulley and a driven pulley, and the driving pulley is connected to a rotating shaft of the motor and rotates around the rotation center axis. It is said.

  According to the present invention, since the rotating body is an endless belt and the driving pulley is provided on the rotating shaft of the motor and rotates around the rotation center axis, the rotation connected to the driving pulley by moving the driven pulley side The endless belt can be moved around the shaft as a rotation center, and the endless belt can be brought into contact with and retracted from the measurement object. Therefore, even when the rotating body is an endless belt, the measurement position and the retracted position can be switched reliably.

  The drive unit is a motor, and the rotation shaft is provided along a second direction orthogonal to a first direction in which a rotation center axis of the motor extends on a horizontal plane. .

  According to the present invention, the rotation axis is provided at an arbitrary position in the first direction by providing the rotation axis along the second direction orthogonal to the first direction in which the rotation center axis of the motor extends on the horizontal plane. Thus, the rotating body can be moved. Therefore, the degree of freedom of the layout of the measuring device can be improved.

  The rotating shaft of the motor protrudes from the main body of the motor and is connected to the rotating body, and the rotation shaft is located below the main body of the motor in the gravitational direction. It is said.

  According to the present invention, since the rotation shaft is located below the motor body in the direction of gravity, the entire motor can be rotated when the rotating body is rotated around the rotation shaft. Furthermore, the rotating body can be rotated around the rotation axis by the weight of the motor. Therefore, the operator can easily move the rotating body.

  The measurement object is a ferrule, and the measurement value is a concentricity of the ferrule.

  According to the present invention, it is possible to obtain a measuring apparatus suitable for measuring the concentricity of a ferrule for connecting optical fibers.

  According to the present invention, the switching mechanism is configured to switch between a measurement position where the rotating body is rotated about the rotation axis and the rotating body is brought into contact with the outer surface of the measurement object, and a retreat position where the rotating body is retracted from the measurement position. Therefore, the measurement position and the avoidance position can be switched by manually rotating the rotating body around the rotation axis, for example. Thereby, unlike a prior art, a rotary body can be moved by a low-cost and simple switching mechanism, without providing complicated mechanisms, such as a cylinder, for example.

It is a perspective view of a measuring device unit. It is sectional drawing of a ferrule. It is a perspective view of the ferrule concentricity measuring apparatus when it exists in a measurement position. It is an enlarged view of an installation stand and an endless belt. It is sectional drawing along the AA line of FIG. It is a perspective view of a ferrule concentricity measuring device when an endless belt is retracted. It is an enlarged view of an installation stand and an endless belt when the endless belt is in the retracted position. It is a ferrule concentricity measuring apparatus which concerns on the modification of embodiment, Comprising: It is explanatory drawing when an endless belt exists in a measurement position. It is a ferrule concentricity measuring apparatus which concerns on the modification of embodiment, Comprising: It is a side view when an endless belt exists in a retracted position. It is an enlarged view of an installation stand and an endless belt when the endless belt is in the retracted position.

The ferrule concentricity measuring apparatus (corresponding to “Measuring apparatus” in the claims) according to the embodiment will be described below.
FIG. 1 is a perspective view of the measuring device unit 1, and FIG. 2 is a cross-sectional view of the ferrule F.
As shown in FIG. 1, the measuring device unit 1 is placed on a horizontal installation surface S. The measuring device unit 1 is a device for measuring the concentricity (corresponding to “predetermined measured value” in the claims) of a ferrule F (see FIG. 2) that is a measurement object, and includes a case 2 and a lid portion. 3, a ferrule concentricity measuring device 4 covered with the case 2 and the lid 3, and a control unit 7 provided inside the measuring device unit 1 and controlling the ferrule concentricity measuring device 4. .

  As shown in FIG. 2, the ferrule F is formed in a cylindrical shape having a through hole F1 through which a core wire of an optical fiber (not shown) is inserted along the central axis C. The outer peripheral edge portion of one end face F2 (right end face in FIG. 2) of the ferrule F is tapered. In addition, the through hole F1 is formed in a tapered shape in which a part of the ferrule F on the other end face F3 is gradually reduced in diameter as it goes from the other end face F3 toward the one end face F2.

As shown in FIG. 1, the case 2 suppresses dust and the like from entering the measuring device unit 1.
In addition, the lid 3 is provided so as to be openable and closable, for example, hinged to the case 2. When the operator opens the lid 3, the ferrule can be set to the ferrule concentricity measuring device 4 in the measuring device unit 1. Further, when the operator closes the lid portion 3, dust and the like are prevented from entering the measuring device unit 1.

FIG. 3 is a perspective view of the ferrule concentricity measuring device 4.
As shown in FIG. 3, the ferrule concentricity measuring device 4 is provided on a base table 62 provided along a horizontal plane, and an imaging unit 50 that images the ferrule F and an installation table on which the ferrule F is installed. 51, a light unit 52 that irradiates the ferrule F with illumination light along the optical axis O, and a motor 40 (corresponding to “driving unit” in the claims). And an endless belt 30 (corresponding to the “rotating body” in the claims), and a switching mechanism 10 that rotates the endless belt 30 and switches the position of the endless belt 30. ing.
In the following, the direction along the rotation center axis M of the motor 40 is the X direction, and when the ferrule F is set in the ferrule concentricity measuring device 4, the side where the operator is present, that is, the front of the ferrule concentricity measuring device 4 is used. Is the + X direction, and the rear is the -X direction. Further, the left-right direction orthogonal to the X direction on the upper surface of the base table 62 is defined as the Y direction, the left side is defined as the + Y direction when the ferrule concentricity measuring device 4 is viewed from the + X direction where the operator exists, and the right direction is defined as the -Y direction. And Further, the vertical vertical direction perpendicular to the upper surface (horizontal plane) of the base table 62 is defined as the Z direction, the upper direction is defined as the + Z direction, and the lower direction is defined as the -Z direction. In the following description, the above-described XYZ orthogonal coordinate system is used as appropriate.

The imaging unit 50 is disposed along the X direction, and is a long lens barrel 55 with the lens tip 55a facing the + X side, an imaging element 56 disposed at the base end of the lens barrel 55, It has.
The lens barrel 55 incorporates a plurality of optical systems (lenses and the like) (not shown) inside, and its optical axis O coincides with the X direction. The lens barrel 55 forms an image of the subject imaged from the lens tip 55a on the image sensor 56 using a plurality of optical systems. Thereby, the ferrule F on the installation base 51 can be imaged by the imaging element 56 via the lens barrel 55.
The image sensor 56 is, for example, a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and a ferrule based on an instruction from the control unit 7 (see FIG. 1). F is imaged and the captured image is output to the control unit 7.

FIG. 4 is an enlarged view of the installation base 51 and the endless belt 30 when viewed from the + X side. FIG. 4 schematically shows a state when the ferrule F is measured, and illustration of members such as a focus plate 51b and a regulation plate 51c (both see FIG. 1) to be described later is omitted as appropriate. ing.
The installation table 51 is supported via a pedestal block 70 provided on the base table 62, and is disposed on the + X side with respect to the lens front end portion 55a. The installation base 51 includes, for example, a pair of support portions 51A and 51B that face each other with a certain gap in the X direction and have a groove portion 51a at the upper end portion.

As shown in FIG. 4, the groove 51 a is formed in a V shape when viewed in the X direction. The ferrule F is arrange | positioned so that the central axis C may follow an X direction in the groove part 51a.
The shape of the groove 51a is not limited to the V shape, and may be a semicircular shape corresponding to the outer shape of the ferrule F, for example.

As shown in FIG. 3, a focus plate 51 b that is aligned with the focus of the imaging unit 50 is provided at the −X side end of the installation base 51. A through hole is formed in the focal plate 51b so as to be coaxial with the optical axis O. The imaging unit 50 can image the ferrule F through the through hole.
The position of the + X side surface of the focus plate 51 b is provided so as to coincide with the focus position of the imaging unit 50. Therefore, the focal position of the imaging unit 50 and the position of the one end face F2 of the ferrule F can be matched by abutting the one end face F2 (see FIG. 2) of the ferrule F against the + X side face of the focusing plate 51b. .

  At the + X side end of the installation base 51, a restriction plate 51c that restricts the positional deviation of the ferrule F toward the + X side is provided. The restriction plate 51c is formed with a through hole arranged coaxially with the optical axis O. The light unit 52 can irradiate the ferrule F with illumination light through the through hole.

  The light unit 52 incorporates a light source (not shown) that emits the illumination light, and is disposed on the + X side of the installation base 51. The light unit 52 can irradiate illumination light emitted from a light source toward the installation base 51 side. In addition, although it does not specifically limit as a light source, For example, LED (Light Emitting Diode: Light emitting diode) etc. are employable. The illumination light is preferably parallel light, for example, laser light.

The endless belt 30 not only rotates the ferrule F but also rotates it around the optical axis O while pressing the ferrule F between the endless belt 30 and the installation base 51. In the following description, the position where the endless belt 30 abuts the outer peripheral surface of the ferrule F and presses the ferrule F between the installation base 51 is referred to as a “measurement position”.
The endless belt 30 is stretched over a drive pulley 31 and a driven pulley 32 that are provided apart from each other in the Y direction, and is attached to a support plate 33.
The support plate 33 is provided with a notch 33a for avoiding interference with the lens tip 55a in the lens barrel 55 so as to open to the -Z side.
On the + X side surface of the support plate 33, a driving pulley 31 and a driven pulley 32 are arranged on both sides of the notch 33a.

FIG. 5 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 5, the drive pulley 31 is driven by a motor 40. The motor 40 is, for example, a DC motor, and its operation and rotation speed are controlled by the control unit 7 (see FIG. 1). The motor 40 is fixed to the −X side surface of the switching mechanism support portion 12 via a motor bracket 44.
The drive pulley 31 is coupled to a rotary shaft 41 protruding from the main body 40 a of the motor 40 toward the + X side via a coupling 42 and a connection shaft 43. The drive pulley 31 rotates around the rotation center axis M of the motor 40 when the motor 40 is driven.

  The connection shaft 43 is inserted into the drive pulley 31 through the inside of the hollow first cylindrical member 13 extending toward the + X side from the switching mechanism support portion 12, and is fixed by, for example, a screw 31a. A pair of bearings 35 and 35 are provided between the connection shaft 43 and the first cylinder member 13 and at both ends in the X direction of the first cylinder member 13.

As shown in FIG. 3, the driven pulley 32 is located at the same height as the drive pulley 31 when the endless belt 30 is in the measurement position. The driven pulley 32 is coupled to the + X side surface of the support plate 33 via a pulley shaft portion (not shown) and is supported rotatably around the pulley shaft portion.
As shown in FIG. 4, the endless belt 30 rotates in a predetermined direction (in this embodiment, counterclockwise when viewed from the + X side) as the drive pulley 31 rotates. At this time, the ferrule F is supported in a state of being pressed against the installation base 51 by the endless belt 30, and the endless belt 30 and the outer peripheral surface are in contact with each other, so that the periphery of the optical axis O remains accommodated in the groove 51a. Can be rotated in a predetermined direction (in this embodiment, clockwise when viewed from the + X side).

(Switching mechanism)
FIG. 6 is a perspective view of the ferrule concentricity measuring device 4 when the endless belt 30 is retracted.
As shown in FIG. 3, the switching mechanism 10 includes a measurement position where the endless belt 30 abuts on the outer peripheral surface of the ferrule F, and an outer periphery of the ferrule F by retracting the endless belt 30 from the measurement position as shown in FIG. 6. This is a mechanism for switching between a position where the surface and the endless belt 30 are separated (hereinafter referred to as “retracted position”). The switching mechanism 10 mainly includes a support plate 33 that supports the endless belt 30 described above, a second cylindrical member 14 that supports the endless belt 30 together with the support plate 33 so as to be rotatable about a rotation axis K, and an operator. And a lever 16 that can be gripped.

  As shown in FIG. 5, the second cylinder member 14 has an inner diameter larger than the outer diameter of the first cylinder member 13, and surrounds the first cylinder member 13 and is concentric with the first cylinder member 13. It is arranged to become. A pair of bearings 18 and 18 are provided between the first cylinder member 13 and the second cylinder member 14 and at both ends in the X direction of the second cylinder member 14. As a result, the second cylinder member 14 is rotatable about the rotation center axis M of the motor 40, which is the center axis of the first cylinder member 13.

  One end portion 33b on the + Y side of the support plate 33 is fastened and fixed to the second cylindrical member 14 by, for example, a bolt or the like. As a result, the support plate 33 and the endless belt 30 attached to the support plate 33 can be rotated around the rotation center axis M of the motor 40 via the second cylindrical member 14. That is, the rotation axis K of the support plate 33 and the endless belt 30 is provided so as to be coaxial with the rotation center axis M of the motor 40.

  As shown in FIG. 3, the lever 16 is provided so as to extend along the + X side from the other end 33c opposite to the notch 33a with the driven pulley 32 in the support plate 33 interposed therebetween. The length of the lever 16 is set so that the operator can easily hold it, for example. The operator can retreat the endless belt 30 together with the support plate 33 around the rotation axis K and retract from the ferrule F by grasping the lever 16 and lifting it to the + Z side (see FIG. 6).

  The base table 62 is provided with a support column 64 extending toward the + Z side along the Z direction. Further, a contact piece 19 that contacts the tip of the support column 64 is provided at the other end 33 c of the support plate 33. When the contact piece 19 contacts the tip of the support column 64, the other end portion 33c of the support plate 33 is supported, and movement to the −Z side by gravity is restricted. The height of the support column 64 is set so that the endless belt 30 is disposed at the measurement position when the contact piece 19 of the support plate 33 contacts and the support plate 33 is supported.

The base table 62 is provided with a sensor support column 66 extending to the + Z side along the Z direction. A position detection sensor 20 is attached to the tip of the sensor support column 66.
The position detection sensor 20 has a detection unit 20a formed in a U shape. The position detection sensor 20 is, for example, an optical sensor, and detects the presence or absence of the detection piece 21 in the opening of the detection unit 20a.
On the opposite side of the lever 16 with the support plate 33 interposed therebetween, the detected piece 21 protrudes toward the −X side. The detected piece 21 is positioned within the opening of the detection unit 20a of the position detection sensor 20 when the endless belt 30 is disposed at the measurement position. Thereby, the position detection sensor 20 can detect that the endless belt 30 is arranged at the measurement position.

  As shown in FIG. 1, the control unit 7 includes a recording medium (not shown) in addition to a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), various interfaces, and the like (not shown). Therefore, the CPU executes the various programs recorded on the recording medium as appropriate, thereby comprehensively controlling the various components described above and measuring the concentricity of the ferrule F. For example, the control unit 7 recognizes ON and OFF of a switch (not shown) provided in the measuring device unit 1 and starts and stops the measurement of the ferrule F by the ferrule concentricity measuring device 4. Further, the control unit 7 of the present embodiment measures the concentricity based on the captured image of the ferrule F sent from the image sensor 56, and further, based on the measurement result, sets the quality of the ferrule F to a predetermined rank. Determine. Thereby, the operator can classify the measured ferrule F corresponding to the quality rank.

Then, the effect | action of the ferrule concentricity measuring apparatus 4 mentioned above is demonstrated based on the ferrule concentricity measurement process which measures the concentricity of the ferrule F. FIG.
Hereinafter, the flow from the end of the measurement of the concentricity of one ferrule F and the classification of the quality rank to the measurement of another ferrule F will be described. At this time, as shown in FIG. 3, the endless belt 30 is in contact with the outer peripheral surface of the ferrule F and presses the ferrule F between the installation base 51 and is disposed at the measurement position.

As shown in FIG. 1, first, after confirming that the measurement of one ferrule F has been completed, the operator opens the lid 3 of the measuring device unit 1.
Next, as shown in FIG. 7, the operator holds the lever 16 provided in the switching mechanism 10 and pulls it upward. As a result, the endless belt 30 disposed at the measurement position rotates about the rotation axis K together with the support plate 33 as shown in FIG. 6 and retreats to a retreat position separated from the outer peripheral surface of the ferrule F.

  Next, the operator holds the endless belt 30 together with the support plate 33 at a predetermined retracted position while holding the lever 16. The retracted position of the endless belt 30 is particularly limited as long as the endless belt 30 is a position separated from the outer peripheral surface of the ferrule F and the operator can replace the ferrule F supported on the installation base 51. For example, it is preferable in terms of workability for the operator that the angle between the horizontal plane and the endless belt 30 is 30 ° or more and 90 ° or less.

Next, the operator takes out the one ferrule for which the concentricity measurement and the quality rank classification have been completed from the groove 51a of the installation base 51, stores the ferrule in a predetermined storage box or the like based on the quality rank, and then measures it. Another ferrule F is placed and set in the groove 51 a of the installation table 51.
Next, the operator holds the lever 16 provided in the switching mechanism 10 and moves it downward. As a result, as shown in FIG. 3, the endless belt 30 rotates around the rotation axis K together with the support plate 33 and approaches the outer peripheral surface of the ferrule F. Then, when the contact piece 19 of the support plate 33 and the tip of the support column 64 come into contact with each other and the support plate 33 is supported by the support column 64, the endless belt 30 contacts the outer peripheral surface of the ferrule F. It arrange | positions to the measurement position which presses F between the installation bases 51. Thus, the operator can switch the endless belt 30 from the retracted position to the measuring position by the switching mechanism 10.

Next, as shown in FIG. 1, the operator closes the lid 3 of the measuring device unit 1 and then turns on a switch (not shown) to measure the concentricity of the ferrule F by the ferrule concentricity measuring device 4. Start.
As a result, as shown in FIG. 3, the motor 40 is driven to rotate the endless belt 30, and the ferrule F that contacts the endless belt 30 also rotates about the central axis C. In addition, the imaging unit 50 starts imaging the ferrule F that rotates around the central axis C, and acquires a plurality of captured images. The control unit 7 (see FIG. 1) measures the concentricity of the ferrule F based on the through hole F1 of the ferrule F reflected in the captured image, and determines the quality rank of the ferrule F based on the measurement result, for example, A It is classified into 5 levels from rank to E rank. This completes the ferrule concentricity measurement process.
The operator can sequentially measure the concentricity of the plurality of ferrules F by repeatedly performing the ferrule concentricity measuring process.

  According to this embodiment, the endless belt 30 is rotated about the rotation axis K, the measurement position where the endless belt 30 is brought into contact with the outer peripheral surface of the ferrule F that is the measurement target, and the endless belt 30 from the measurement position. Since the switching mechanism 10 that switches between the retracted position and the retracted position is provided, the measurement position and the avoidance position can be switched by manually rotating the endless belt 30 around the rotation axis K, for example. Thereby, the endless belt 30 can be moved by the low-cost and simple switching mechanism 10 without providing a complicated mechanism such as a cylinder as in the conventional technique.

  Further, since the rotation axis K of the endless belt 30 is provided so as to be coaxial with the rotation center axis M of the motor 40, the endless belt 30 is small without rotating the heavy motor 40 around the rotation axis K. The endless belt 30 can be moved by force. Therefore, the operator can move the endless belt 30 easily.

  Moreover, since the endless belt 30 is provided as a rotating body and the driving pulley 31 is provided on the rotating shaft 41 of the motor 40 and rotates around the rotation center axis M, it is connected to the driving pulley 31 by moving the driven pulley 32 side. The endless belt 30 can be moved about the rotation shaft 41 thus rotated, and the endless belt 30 can be brought into contact with and retracted from the ferrule F that is a measurement target. Therefore, even when the rotating body is the endless belt 30, it is possible to reliably switch between the measurement position and the retracted position.

  Further, by providing the switching mechanism 10 described above, it is possible to obtain the ferrule concentricity measuring device 4 that is particularly suitable for measuring the concentricity of the ferrule F for connecting the optical fibers.

(Modification of the embodiment)
FIG. 8 is an explanatory view of the ferrule concentricity measuring device 4 according to the modification of the embodiment, in which the endless belt 30 is in the measurement position, and FIG. 9 is a view when the endless belt 30 is in the retracted position. FIG. 10 is an enlarged view of the installation base 51 and the endless belt 30 when the endless belt 30 is in the retracted position. In FIGS. 8 and 9, a rotating plate 74 and a lever 16, which will be described later, are indicated by a two-dot chain line. 8 to 10 schematically show the ferrule concentricity measuring device 4.
Then, the ferrule concentricity measuring apparatus 4 which concerns on the modification of embodiment is demonstrated.
In the ferrule concentricity measuring device 4 of the embodiment, the rotation axis K of the endless belt 30 (rotating body) by the switching mechanism 10 is provided so as to be coaxial with the rotation center axis M of the motor 40 (see FIG. 3). ).
In contrast, in the ferrule concentricity measuring device 4 according to the modification of the embodiment, the rotation axis K of the endless belt 30 (rotating body) by the switching mechanism 10 is coaxial with the rotation center axis M of the motor 40. It is different from the embodiment in that it is not provided. In addition, description is abbreviate | omitted about the structure similar to embodiment.

  As shown in FIG. 8, the ferrule concentricity measuring device 4 according to the modification of the embodiment is supported by the base portion 72. Among the components of the ferrule concentricity measuring device 4, for example, the imaging unit 50, the light unit 52 (both see FIG. 3, neither shown in FIG. 8), the motor 40 and the endless belt 30 are on the rotating plate 74. And is supported by the base portion 72 via a rotating plate 74. Further, the installation base 51 is directly supported by the base portion 72.

  As shown in FIG. 8, the switching mechanism 10 according to the modification of the embodiment has a measurement position where the endless belt 30 abuts on the outer peripheral surface of the ferrule F, and the endless belt 30 from the measurement position as shown in FIG. 9. A mechanism for switching between a retracted position (see FIG. 9) in which the outer peripheral surface of the ferrule F and the endless belt 30 are separated from each other, and mainly includes a rotating plate 74, a rotating shaft member 75, And a lever 16 that can be gripped by the operator.

The rotation plate 74 is connected to the base portion 72 via a rotation shaft member 75 and is rotatable around the rotation shaft member 75.
The rotation shaft member 75 is, for example, in a Y direction (corresponding to the “first direction” in the claims) extending in the X direction (corresponding to the “first direction” in the claims) extending in the horizontal plane. It is a columnar shaft member provided so as to follow. The endless belt 30 can be rotated around the rotation axis K of the rotation shaft member 75 by the rotation of the rotation plate 74. Further, the rotation shaft member 75 is provided on the −Z side (that is, below in the direction of gravity) with respect to the main body portion 40a of the motor 40 with the rotation plate 74 interposed therebetween.
A lever 16 is provided at the + X side end of the rotating plate 74. The operator can rotate the rotation plate 74, the motor 40 on the rotation plate 74, the endless belt 30, and the like around the rotation axis K by holding the lever 16 and lifting it to the + Z side.

After exchanging the ferrule concentricity measurement process, when exchanging the ferrule F of the installation base 51, the operator holds the lever 16 provided in the switching mechanism 10 and pulls it upward. As a result, the endless belt 30 arranged at the measurement position rotates about the rotation axis K together with the rotation plate 74 and retreats to a retreat position separated from the outer peripheral surface of the ferrule F.
By the way, the main body 40a of the motor 40 incorporates heavy objects such as a coil and a magnet. Here, since the rotation shaft member 75 is disposed on the −Z side (below the gravitational direction) with respect to the main body portion 40 a of the motor 40 with the rotation plate 74 interposed therebetween, the operator holds the lever 16. When pulled upward, the rotating plate 74 is easily rotated by the gravity of the motor 40.

  According to the modification of the embodiment, the rotation axis K is provided along the Y direction orthogonal to the X direction in which the rotation center axis M of the motor 40 extends on a horizontal plane, thereby rotating to an arbitrary position in the X direction. A rotation shaft member 75 serving as the axis K can be provided to move the endless belt 30. Therefore, the freedom degree of the layout of the ferrule concentricity measuring device 4 can be improved.

  Further, since the rotation axis K is located on the −Z side (that is, below in the direction of gravity) with respect to the main body portion 40 a of the motor 40, the rotation of the endless belt 30 around the rotation axis K is performed every time the motor 40 is rotated. Can be moved. Furthermore, the endless belt 30 can be rotated around the rotation axis K by the weight of the motor 40. Therefore, the operator can move the endless belt 30 easily.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The measuring device unit 1 and the ferrule concentricity measuring device 4 described above are examples, and are not limited to the configurations of the above-described embodiment and the modified example of the embodiment. Therefore, after the endless belt 30 is switched from the measurement position to the retracted position by the switching mechanism 10, one ferrule is taken out from the installation table 51 by the operator's hand and another ferrule F is set. A ferrule collection device and a ferrule supply device that can be taken out and set may be provided.

  In the embodiment and the modification of the embodiment, the endless belt 30 is described as an example of the rotating body, but the rotating body is not limited to the endless belt 30. The rotating body only needs to contact the outer surface of the measurement object (in the embodiment, ferrule F) and rotate the measurement object. Therefore, the rotating body may be, for example, a cylindrical body that can contact the outer surface of the measurement target.

  In the modification of the embodiment, the rotation shaft member 75 is provided on the −Z side (that is, below in the direction of gravity) of the motor 40 with the rotation plate 74 interposed therebetween. Is not limited to the modification of the embodiment. Therefore, for example, the rotation shaft member 75 is on the −Z side (that is, the lower side in the gravity direction) of the motor 40 with the rotation plate 74 interposed therebetween, and is on the −X side of the main body portion 40 a of the motor 40. Also good.

  In the embodiment, the optical sensor is employed as the position detection sensor 20 that detects that the endless belt 30 is disposed at the measurement position, but the present invention is not limited to this. Therefore, for example, a magnetic sensor may be employed as the position detection sensor 20, or an angle sensor that detects a rotation angle around the rotation axis K of the endless belt 30 may be employed. Further, the ferrule concentricity measuring device 4 may be configured without providing the position detection sensor 20.

  In the embodiment and the modification of the embodiment, the operator holds the endless belt 30 together with the support plate 33 at a predetermined retracted position while holding the lever 16. It is good also as a structure which can be hold | maintained in a retracted position by providing rotation and restricting rotation of the support plate 33.

  In the embodiment and the modification of the embodiment, the ferrule concentricity measuring device 4 for measuring the concentricity of the ferrule F as a measurement target has been described as an example, but the measurement target is not limited to the ferrule F. Therefore, for example, the switching mechanism 10 of the measuring device according to the present invention can also be applied to a device that measures the concentricity of a metal pipe.

  The positional relationship between the lever 16 and the rotation axis K is not limited to the embodiment. In the ferrule concentricity measuring device 4 according to the embodiment, when viewed from the + X side (that is, the operator side), the rotation axis K is disposed on the + Y side (that is, the left side) and the lever 16 is −Y side (that is, the right side). The layout is suitable for right-handed workers. On the other hand, when the ferrule concentricity measuring device 4 is viewed from the + X side (that is, the worker side), the rotation axis K is disposed on the −Y side (that is, the right side) and the lever 16 is positioned on the + Y side (that is, the right side). (Left side). In this case, the ferrule concentricity measuring device 4 is suitable for a left-handed worker.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Switching mechanism 30 ... Endless belt 31 ... Drive pulley 32 ... Driven pulley 40 ... Motor (drive part) 40a ... Main-body part 41 ... Rotating shaft F ... Ferrule (Measurement target) K ... Rotation axis M ... Rotation center axis

Claims (4)

A rotating body that rotates by the power of the drive unit and contacts the outer surface of the measurement target;
A switching mechanism that switches between a measurement position for rotating the rotating body around a rotation axis and bringing the rotating body into contact with an outer surface of the measurement object, and a retreat position for retracting the rotating body from the measurement position; ,
With
Obtain a predetermined measurement value according to the rotation state of the measurement object,
The drive unit is a motor,
The rotating shaft is provided along a second direction orthogonal to a first direction in which a rotation center axis of the motor extends on a horizontal plane,
The rotating shaft of the motor is projected from the main body of the motor and connected to the rotating body,
The rotating shaft is located below the main body of the motor in the direction of gravity. The measuring apparatus according to claim 1,
The measuring apparatus, wherein the rotation axis is provided so as to be coaxial with a rotation center axis of the motor. The measuring apparatus according to claim 2,
The rotating body is an endless belt stretched between a driving pulley and a driven pulley,
The measurement apparatus according to claim 1, wherein the drive pulley is connected to a rotation shaft of the motor and rotates around the rotation center axis. The measuring apparatus according to any one of claims 1 to 3 ,
The measurement object is a ferrule,
The measurement apparatus is characterized in that the measured value is a concentricity of the ferrule.

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