JP7455670B2 - Image dimension measuring device - Google Patents

Description

The present invention relates to an image dimension measuring device equipped with a rotation unit that rotates an object to be measured.

BACKGROUND OF THE INVENTION Conventionally, dimension measuring apparatuses have been known that obtain dimensions of each part of a measurement target object based on an image of the measurement target object held rotatably. For example, Patent Document 1 discloses that a machining tool fixed to the main shaft of a machining center is imaged from the side with a camera, a contour image is extracted by performing image processing on the image taken by the camera, and a contour image is extracted from the contour image. An apparatus for calculating the dimensions of a machining tool is disclosed.

Japanese Patent Application Publication No. 2006-284531

In a machining center such as the one disclosed in Patent Document 1, the main shaft can be fixed with a brake when attaching and detaching the processing tool, so the main spindle does not rotate when attaching and detaching the processing tool, but it is possible to use a dimension measuring device other than the machining center for measurement. A rotation unit that rotates the object may be provided, and in this case, the following problems may occur.

In other words, the rotation unit requires a motor to rotate the object to be measured, and a chuck mechanism for gripping the object to be measured is fastened to the rotating body that is rotationally driven by the output shaft of this motor. is possible. If the chuck mechanism is configured to be fastened to a rotating body, for example, if the rotating body rotates due to the fastening force when the chuck mechanism is attached or detached, the attachment/detachment operation becomes difficult and the attachment/detachment operation itself becomes incomplete. There is a risk that this may occur. To solve this problem, it would be possible to fix the rotating body, but the rotating unit does not have such a structure in the first place, and the fastening force when attaching and detaching the measurement object is strong. The problem is how to fix the rotating body.

In addition, the chuck mechanism is equipped with a plurality of chuck claws that grip the chucked portion of the measurement target, and by moving these chuck claws in the radial direction, the chucked state in which the chucked portion is gripped and the state in which the chucked portion is separated from the chucked portion can be changed. It is possible to switch to a non-chucked state. When moving the chuck jaws in the radial direction, an adjustment member that can be rotated is often used, and it is desirable not to impede the rotation of the adjustment member when attaching or detaching the object to be measured.

In other words, when attaching and detaching the chuck mechanism, it is necessary to stop the rotating body on the motor side so that it does not rotate, while the adjustment member must be designed so that the chuck claws can be easily moved in the radial direction when attaching and detaching the object to be measured. However, it was difficult to achieve both of these requirements without interfering with rotation.

The present disclosure has been made in view of the above, and an object of the present disclosure is to prevent the rotating body on the motor side from rotating when the chuck mechanism is attached or detached, thereby improving the workability of attaching and detaching the chuck mechanism. The claw adjustment member is rotatable to improve workability in attaching and detaching the object to be measured.

In order to achieve the above object, the first disclosure may be based on an image dimension measuring device that measures the dimensions of an object to be measured. The image dimension measuring device includes a stage for placing a measurement object, an imaging section for capturing an image of the measurement object placed on the stage and generating an image of the measurement object, and an end of the stage. a rotating unit that is attached to the rotating body and has a housing that includes a built-in motor; a rotating body that is rotated by the motor around a rotational axis that intersects with the optical axis of the imaging unit; and a rotating unit that is fastened and fixed to the rotating body by a fastening member. , a chuck body that is rotated by the motor together with the rotating body around the rotation axis; and a chuck body that slides along a plurality of grooves that extend in the radial direction and are spaced apart from each other in the circumferential direction. a plurality of chuck claws that are arranged so as to be adjustable; and an adjusting member for moving the plurality of chuck claws in a radial direction along the groove by manually rotating the chuck claws about the rotation axis with respect to the chuck body. a locking state in which rotation of the adjusting member is permitted while mechanically prohibiting rotation of the rotating body with respect to the housing; and a locking state in which rotation of the rotating body and rotation of the adjusting member is prohibited The configuration may include a locking mechanism that can be switched to a permissible unlocked state.

According to this configuration, by placing the lock mechanism in the locked state, rotation of the rotating body is mechanically prohibited with respect to the casing, so the chuck body of the chuck mechanism is fastened to the rotating body using the fastening member. At this time, the rotating body does not rotate together with the fastening member, making it possible to strongly fasten the fastening member. Further, even when the fastening member is loosened, the rotating body does not rotate with the fastening member. This improves the workability of attaching and detaching the chuck mechanism.

Even when the lock mechanism is in the locked state, the adjustment member of the chuck mechanism is allowed to rotate, so it is possible to move the chuck claws in the radial direction by rotating the adjustment member. This allows the object to be measured to be grasped and removed, so that the workability for attaching and detaching the object to be measured is also good.

On the other hand, by setting the locking mechanism in the unlocked state, rotation of the rotating body is allowed, so that the rotating body can be rotated by the motor. Thereby, the object to be measured gripped by the chuck mechanism can be rotated around the rotation axis intersecting the optical axis of the imaging section, and the object to be measured can be placed in a desired posture and imaged by the imaging section. The dimensions of each part are obtained based on the measurement object image generated by the imaging section.

In the second disclosure, the chuck mechanism includes a first chuck mechanism having three or more chuck claws for gripping a shaft object, and a second chuck mechanism having two chuck claws for gripping a box object. There is. The chuck main body of the first chuck mechanism and the chuck main body of the second chuck mechanism may include a common fastened portion fastened to the rotating body.

When measuring a shafted object, the first chuck mechanism dedicated to the shafted object can firmly grip the shafted object, and when measuring a boxed object, the second chuck mechanism dedicated to the boxed object can hold the box object firmly. You can hold it firmly. Therefore, the range of measurable objects to be measured can be expanded. In this case, since the fastened portion of the first chuck mechanism and the fastened portion of the second chuck mechanism are common, the first chuck mechanism and the second chuck mechanism can be replaced without changing the rotating body. The first chuck mechanism may have, for example, four chuck claws.

In a third disclosure, the chuck mechanism is configured to be able to change the mounting direction of the chuck claws. For example, the mounting direction of the chuck jaws can be set so that a solid object to be measured can be gripped from the outside by bringing the plurality of chuck jaws close to each other. By changing the mounting direction of the chuck claws, it becomes possible to grasp the hollow object to be measured from the inside by separating the plurality of chuck claws from each other.

In a fourth disclosure, the outer diameter of the adjustment member may be larger than the outer diameter of the fastening member.

That is, when comparing the frequency of attaching and detaching the object to be measured and the frequency of attaching and detaching the chuck mechanism under general usage conditions, the frequency of attaching and detaching the object to be measured is higher. By increasing the size of the adjustment member used when attaching and detaching the object to be measured, the operability of the operator when attaching and detaching the object to be measured is improved.

In a fifth disclosure, the rotating body has a lock hole that opens on the outer peripheral surface, and the lock mechanism includes a lock member inserted into the lock hole, and a lock member that is inserted into the lock hole in a radial direction of the rotating shaft. The device may also include a support member that supports the housing in a reciprocating manner.

According to this configuration, by advancing the lock member in the radial direction of the rotating shaft, it can be inserted into the lock hole of the rotating body, thereby inhibiting rotation of the rotating body. On the other hand, by retracting the lock member, the lock member can be removed from the lock hole of the rotating body, thereby allowing the rotating body to rotate. In other words, a desired operation can be achieved by a simple operation of reciprocating the locking member. When the rotating body is locked by the locking member, since the locking member is supported by the housing, the locking member will not rotate when rotational force is applied to the rotating body, and the rotating body will be securely locked. can be locked to

In a sixth disclosure, the rotation unit includes a manual adjustment knob, a rotation amount detection section that detects a rotation amount of the manual adjustment knob and outputs a detection signal according to the rotation amount, and a rotation amount detection section that detects a rotation amount of the manual adjustment knob and outputs a detection signal according to the rotation amount. It may also include a processing circuit that receives the output detection signal, converts it into a rotation amount of the motor, and rotates the motor by the converted rotation amount.

According to this configuration, when the user rotates the manual adjustment knob when rotating the measurement target, the rotation amount of the manual adjustment knob is detected by the rotation amount detection section, and a detection signal corresponding to the rotation amount is sent to the rotation amount. The detection unit outputs the signal to the processing circuit. The processing circuit converts the detection signal output from the rotation amount detection section into the rotation amount of the motor. At this time, the direction of rotation of the manual adjustment knob can be matched with the direction of rotation of the rotating body by the motor. In addition, the amount of rotation of the motor can be set so that the amount of rotation of the manual adjustment knob corresponds to the amount of rotation of the rotating body by the motor, that is, the amount of rotation of the object to be measured.For example, the amount of rotation of the manual adjustment knob can be set. The processing circuit may set the amount of rotation of the motor so that the amount of rotation of the object to be measured is smaller than the amount of rotation of the object to be measured. Since the processing circuit rotates the motor by the set amount of rotation, the object to be measured can be rotated as desired by the user. This allows the user to manually position the object to be measured.

In a seventh disclosure, based on a measurement object image generated by capturing an image of the measurement object mounted on the chuck mechanism with the imaging unit while rotating the measurement object with the motor, a dimensional error caused by shake of the measurement object The camera may also include a shake correction unit that corrects the vibration.

In other words, when the object to be measured to which the chuck mechanism is attached is rotated, it may oscillate about the axis of rotation. In this case, by capturing an image with the imaging unit while rotating the measurement target, it is possible to obtain the amount of shake of the measurement target with respect to the rotation axis. Based on the acquired amount of shake, correction is made in the direction of eliminating shake, thereby improving dimensional accuracy.

An eighth disclosure provides a lock state detection section that detects that the lock mechanism is in a locked state, and a lock state detection section that detects that the lock mechanism is in a locked state, and a user who operates the motor. The device may also include a notification section that notifies the user that the lock mechanism is in the locked state when the user attempts to rotate the device.

According to this configuration, when the lock mechanism enters the locked state, it is detected by the lock state detection section. In this state, it is conceivable that the user attempts to rotate the object to be measured, that is, attempts to rotate the motor, without knowing, forgetting, or noticing that it is in the locked state. In such a case, with this configuration, the user is notified that the lock mechanism is in the locked state, so the user can unlock the lock mechanism before rotating the object to be measured.

The notification unit may be, for example, a display device. In the case of a display device, the fact that the locking mechanism is in the locked state can be displayed in a pop-up to notify the user. Furthermore, the notification section may be, for example, a speaker. In the case of a speaker or the like, the user can be notified by audio output that the lock mechanism is in the locked state.

According to the present disclosure, it is possible to allow the adjustment member of the chuck mechanism to rotate while mechanically prohibiting the rotation of the rotating body of the rotating unit with respect to the housing, so that the rotating body of the rotating unit rotates when the chuck mechanism is attached or detached. This makes it possible to improve the workability of attaching and detaching the chuck mechanism while also making the adjustment member of the chuck claw rotatable, thereby improving the workability of attaching and detaching the object to be measured.

1 is a front view of an image dimension measuring device according to an embodiment of the present invention. It is a perspective view of the above-mentioned image size measuring device. It is a block diagram of the above-mentioned image size measuring device. FIG. 3 is a perspective view of the rotation unit as seen diagonally from above. FIG. 3 is a plan view of the rotation unit. 6 is a sectional view taken along the line VI-VI in FIG. 5. FIG. It is a side view of a locking mechanism. It is an exploded perspective view of a motor, a lock mechanism, and a rotating body. FIG. 3 is a perspective view showing the positional relationship between a rotating body and a lock mechanism. FIG. 3 is a perspective view showing a state in which the chuck mechanism is attached to a rotating body. FIG. 3 is an exploded perspective view of the chuck mechanism and the rotating body as seen from the left side. It is an exploded perspective view of the chuck mechanism seen from the right side. FIG. 10 is a diagram corresponding to FIG. 10 relating to a modification of the chuck mechanism. It is a perspective view showing another form of a chuck mechanism. FIG. 14 is a view corresponding to FIG. 14 showing a modification of another form of the chuck mechanism.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 is a front view of an image dimension measuring device 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the image dimension measuring device 1 according to an embodiment of the present invention. Further, FIG. 3 is a block diagram schematically showing the configuration of the image dimension measuring device 1 according to the embodiment of the present invention. The image dimension measurement device 1 measures the dimensions of a measurement target W (shown in FIGS. 1 and 2) such as various workpieces, and as shown in FIG. It includes a storage section 4 and a rotation unit 5. The control unit 3 may be separate from the device main body 2 and communicably connected to the device main body 2 through a communication line or the like, or may be incorporated and integrated inside the device main body 2. Similarly, the storage unit 4 may be separate from the device main body 2, or may be integrated into the device main body 2. In this example, the control unit 3 and the storage section 4 are separate bodies, but they may be integrated.

In the description of this embodiment, when the image dimension measuring device 1 is viewed from the user, the side located in front is referred to as the front side, the side located in the back is referred to as the rear side, and the side located on the left is referred to as the front side. is called the left side, and the side located on the right is called the right side. The front side can be called the near side, and the back side can also be called the back side. This is only defined for convenience of explanation.

(Configuration of device main body 2 and control unit 3)
As shown in FIGS. 1 and 2, the device main body 2 includes a base portion 10 and an arm portion 11 extending upward from the back side of the base portion 10. As shown in FIGS. A stage 12 is provided on the top of the base portion 10 on which the object W to be measured is placed. The stage 12 extends substantially horizontally. A transmitting section 12a is provided near the center of the stage 12 to transmit light. The stage 12 can be driven by a stage drive section 12c shown in FIG.

As shown in FIG. 3, the device main body 2 is provided with a lighting section 13. The illumination section 13 includes an epi-illumination section 13a built into the arm section 11 and a transmitted illumination section 13b built into the base section 10. The epi-illumination unit 13a is an illumination device that illuminates the measurement target W mounted (stationary) on the stage 12 or the measurement target W rotatable by the rotation unit 5 from above, and uses light from the imaging unit 15, which will be described later. It can be formed in the shape of a ring surrounding axis A (shown in Figure 1). The transmitted illumination section 13b is an illumination device that illuminates the measurement object W placed on the transmission section 12a of the stage 12 or the measurement object W rotatable by the rotation unit 5 from below. In FIGS. 1 and 2, only the measurement object W that can be rotated by the rotation unit 5 is shown.

An operating section 14 is provided on the front side of the base section 10. The operation unit 14 includes various buttons, switches, dials, etc. that are operated by the user. The operating section 14 is connected to the control unit 3, and the control unit 3 detects the operating state of the operating section 14 and controls each section according to the operating state of the operating section 14. The operation unit 14 may be configured with a touch panel or the like capable of detecting a user's touch operation, and in this case, the operation unit 14 can be incorporated into a display unit 16, which will be described later. Furthermore, the operation section 14 may be configured with a keyboard, a mouse, etc. that can be connected to the control unit 3.

The epi-illumination section 13a and the transmitted illumination section 13b are connected to and controlled by the control unit 3. For example, when the control unit 3 detects that an operation to start measurement of the measurement target object W has been performed using the operation section 14, the epi-illumination section 13a or the transmitted illumination section 13b can be turned on to irradiate light.

The arm section 11 is provided with an imaging section 15 (shown in FIG. 3). The imaging unit 15 is a part for capturing an image of the measurement object W placed on the stage 12 or the measurement object W rotatable by the rotation unit 5, and generating a measurement object image. An example of the imaging unit 15 is a camera having an imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). As shown in FIG. 1, the optical axis A of the imaging section 15 is set vertically downward, and although not shown, an optical system including a light receiving lens and an imaging lens is installed coaxially with the optical axis A of the imaging section 15. It is being The imaging section 15 may be an imaging unit that includes an optical system, or may not include an optical system. Light emitted from the epi-illumination section 13a and reflected by the measurement target W, light emitted from the transmissive illumination section 13b and transmitted through the transmissive section 12a of the stage 12, etc. enter the imaging section 15. . As the method of focus adjustment using the optical system, a conventionally used method can be applied.

The imaging unit 15 generates an image based on the amount of received light. The imaging section 15 is connected to the control unit 3, and the images generated by the imaging section 15 are transmitted to the control unit 3 as image data. Further, the control unit 3 can control the imaging section 15. For example, when the control unit 3 detects that an operation to start measuring the object W to be measured has been performed using the operation section 14, the epi-illumination section 13a or the transmitted illumination section 13b is turned on to emit light, and the imaging section 15 is activated. Execute imaging processing. Thereby, a measurement target object image is generated in the imaging section 15, and the generated measurement target object image is transmitted to the control unit 3.

The control unit 3 incorporates the measurement object image transmitted from the imaging section 15 into a user interface screen and displays it on the display section 16. That is, the display section 16 is provided on the upper part of the arm section 11 so as to face the front. The display section 16 is configured with, for example, a liquid crystal display or an organic EL display, and is connected to the control unit 3. The control unit 3 controls the display section 16 to display various user interface screens on the display section 16 .

A storage section 4 is connected to the control unit 3. The storage unit 4 is composed of, for example, an SSD (Solid State Drive) or a hard disk. The control unit 3 is connected to each piece of hardware as described above, controls the operation of each piece of hardware, and executes software functions according to a computer program stored in the storage unit 4. Although not shown, the control unit 3 is provided with a RAM or the like, in which a load module is expanded when a computer program is executed, and stores temporary data generated when the computer program is executed.

The control unit 3 is provided with an edge extraction section 30 and a measurement section 31. The edge extraction section 30 is a section that extracts edges (outlines) of the measurement object W by performing image processing on the measurement object image transmitted from the imaging section 15. Since the method of extracting edges of the measurement object is well known, detailed explanation will be omitted. The edge extraction unit 30 outputs an edge image indicating the edge of the measurement target object.

The edge image output from the edge extraction section 30 is input to the measurement section 31. The measurement unit 31 measures the dimensions of each part of the measurement object W using the edge image. The size measurement site can be specified in advance by the user. For example, when the user operates the operation unit 14 to specify two arbitrary points on the measurement target image while viewing the measurement target image displayed on the display unit 16, the The measurement site of the measurement object W can be specified. The measurement unit 31 can obtain the dimensions of a predetermined region by calculating the distance between edges, edge length, etc. corresponding to the measurement region specified by the user. The acquired dimensions can be displayed on the display unit 16. At this time, the value indicating the dimension and the dimension line can be displayed superimposed on the measurement object image.

(Configuration for rotating the measurement target W)
In this embodiment, the measurement target object W can be measured not only by placing it on the stage 12 but also by rotating the measurement target W. Specifically, the image dimension measuring device 1 includes a rotation unit 5 that generates and outputs rotational force, a chuck mechanism 6 that grips the measurement object W, and a rotation unit 5 that rotates the measurement object W and the accompanying structures. A lock mechanism 7 is provided to temporarily stop the rotation of the unit 5. Although the details will be described later, the chuck mechanism 6 is configured to be detachable from the rotation unit 5, and when the chuck mechanism 6 is attached to the rotation unit 5, the rotational force output from the rotation unit 5 is applied to the chuck. The signal is transmitted to the object W to be measured via the mechanism 6 and rotates the object W to be measured. The rotation unit 5 can keep the measurement object W rotated by a predetermined angle and then stopped.

(Configuration of rotating unit 5)
As shown in FIG. 1, the rotation unit 5 allows the measurement target W to be rotated around a predetermined rotation axis B in a state where it is placed above the transparent part 12a of the stage 12, and is stopped at an arbitrary rotation position to rotate the measurement target W. This is a stage for maintaining posture. In this embodiment, the rotation unit 5 is separate from the stage 12 and configured to be detachable from the stage 12, but the rotation unit 5 and the stage 12 may be configured as one unit. . In the case of a removable rotation unit 5, the rotation unit 5 can be attached to the stage 12 only when the rotation unit 5 is needed, and can be removed from the stage 12 when it is not needed.

The rotation unit 5 includes a motor 50 (shown in FIG. 8), a housing 51 containing the motor 50, and a rotating body 52 rotated by the motor 50. The motor 50 is fixed to a housing 51. The housing 51 is attached to the left end of the stage 12. That is, as shown in FIGS. 4 to 6, a mounting plate 53 is provided at the bottom of the housing 51. The mounting plate 53 extends horizontally from the front side to the back side of the stage 12. The front side and the back side of the mounting plate 53 are each fastened to the stage 12 by bolts 53a. For example, a screw hole (not shown) into which the bolt 53a is screwed is formed in the stage 12, and the housing 51 is attached to the left end of the stage 12 by placing the mounting plate 53 and then screwing the bolt 53a into the screw hole. It can be attached to the section. The housing 51 can be easily removed by loosening the bolts 53a. The housing 51 may be attached to the right end of the stage 12, and in this case, the stage 12 shown in FIG. 1 etc. may be made bilaterally symmetrical.

With the housing 51 attached to the stage 12, the output shaft 50a of the motor 50 is arranged to extend horizontally toward the right. A rotating body 52 is fixed to this output shaft 50a, and therefore, the rotating body 52 is rotated around a rotating axis B that extends horizontally in the left-right direction. Since the optical axis A of the imaging section 15 is in the vertical direction, the rotation axis B intersects with the optical axis A of the imaging section 15. In this embodiment, the rotation axis B is orthogonal to the optical axis A of the imaging unit 15, but it does not have to be orthogonal.

As shown in FIGS. 1 and 2, a chuck mechanism 6 is attached to the rotating body 52. As shown in FIG. 8, the rotating body 52 includes a connecting portion 52a connected to the output shaft 50a of the motor 50. The connecting portion 52a is prevented from rotating relative to the output shaft 50a so that the connecting portion 52a and the output shaft 50a do not rotate relative to each other. In this embodiment, the rotating body 52 is directly connected to the output shaft 50a of the motor 50, but the invention is not limited to this. For example, a reduction gear mechanism (not shown) may be connected between the motor 50 and the rotating body 52. It may be provided. In this case, the rotating body 52 is connected to the output shaft of the reduction gear mechanism, but since the output shaft of the reduction gear mechanism is also an output shaft rotated by the output of the motor 50, it is included in the scope of the present invention. It will be done.

As shown in FIG. 9, the rotating body 52 has an annular peripheral wall portion 52b that protrudes from the connecting portion 52a in the direction of the rotation axis B (to the right) and extends in the circumferential direction of the rotation axis B. The connecting portion 52a and the peripheral wall portion 52b are integrated. The axis of the peripheral wall portion 52b is located on the rotation axis B. A thread is formed on the outer peripheral surface of the peripheral wall portion 52b.

The rotating body 52 has a plurality of lock holes 52d for locking the rotating body 52 with the locking mechanism 7. The plurality of lock holes 52d are formed on the left side of the peripheral wall portion 52b at intervals in the circumferential direction of the peripheral wall portion 52b. The lock hole 52d may be a concave portion formed in the peripheral wall portion 52b, and does not penetrate through the peripheral wall portion 52b. The lock hole 52d opens on the outer peripheral surface of the peripheral wall portion 52b, and also opens on the left end surface of the peripheral wall portion 52b. The lock holes 52d can be formed at equal intervals in the circumferential direction of the peripheral wall portion 52b. Furthermore, the lock hole 52d may pass through the peripheral wall portion 52b.

As shown in FIG. 4 etc., the rotation unit 5 includes a manual adjustment knob 55, an encoder 56 (shown in FIG. 3) that detects the amount of rotation of the manual adjustment knob 55, and a processing circuit 57 (shown in FIG. 3). We are prepared. The manual adjustment knob 55 is supported by the housing 51 so as to be rotatable around an axis parallel to the rotation axis B. The manual adjustment knob 55 is located on the front side and left side of the housing 51, and protrudes from the housing 51 toward the left side. Thereby, the user can rotate the manual adjustment knob 55 with his left hand while sitting in front of the image dimension measuring device 1. Note that the position of the manual adjustment knob 55 is not particularly limited, and may be on the back side of the housing 51 or on the left side.

The encoder 56 is built into the housing 51, and can be configured with a conventionally known rotary encoder or the like. For example, when the user rotates the manual adjustment knob 55, the amount of rotation can be detected by the encoder 56, and the result detected by the encoder 56 is sent from the encoder 56 to the processing circuit 57 as a signal regarding the amount of rotation. Output.

The processing circuit 57 is a part that controls the motor 50, and may be built into the control unit 3 or the device main body 2. The processing circuit 57 receives a signal regarding the amount of rotation output from the encoder 56, converts it into the amount of rotation of the motor 50, and rotates the motor 50 by the converted amount of rotation. The amount of rotation of the manual adjustment knob 55 and the amount of rotation of the output shaft 50a of the motor 50 do not need to match, but only need to correspond to each other. For example, when the user rotates the manual adjustment knob 55 by 10 degrees, the encoder 56 detects that the manual adjustment knob 55 has rotated by 10 degrees, and outputs a detection signal to the processing circuit 57 according to the amount of rotation. When the processing circuit 57 acquires information that the manual adjustment knob 55 has rotated 10 degrees, the processing circuit 57 converts the amount of rotation of the manual adjustment knob 55 at a predetermined ratio and outputs a control signal to the motor 50. The control signal may be a signal that causes the output shaft 50a of the motor 50 to rotate by less than 10 degrees.

The control of the motor 50 by the processing circuit 57 is executed almost in real time, so when the manual adjustment knob 55 starts rotating, the motor 50 also rotates almost synchronously, and when the manual adjustment knob 55 stops, the motor 50 also rotates almost synchronously. Motor 50 also stops. This allows the user to rotate the measurement object W by an arbitrary angle.

In this example, since the rotating body 52 is directly driven by the motor 5, the processing circuit 57 only needs to control the motor 50 so that the output shaft 50a of the motor 50 rotates by the amount of rotation of the manual adjustment knob 55. . When a reduction gear mechanism is provided between the output shaft 50a of the motor 50 and the rotating body 52, the processing circuit 57 takes the reduction gear ratio into consideration and reduces the amount of rotation of the motor 50 by more than the amount of rotation of the manual adjustment knob 55. What is necessary is to rotate the output shaft 50a.

The rotation unit 5 is provided with a connection line 5a that is connected to the control unit 3 or the device main body 2. Electric power is supplied to the motor 50 via the connection line 5a. Further, communication between the rotation unit 5 and the control unit 3 or communication between the rotation unit 5 and the apparatus main body 2 is performed via the connection line 5a.

(Configuration of lock mechanism 7)
The locking mechanism 7 is a mechanism for mechanically prohibiting rotation of the rotating body 52 of the rotating unit 5 with respect to the housing 50. As shown in FIGS. 7 and 8, the lock mechanism 7 includes a lock member 70, a support member 71 that supports the lock member 70 in a reciprocating manner, and a lock detection sensor 72. The support member 71 is formed into a thick plate shape, is disposed on the right side of the motor 50, and is fixed to the housing 51. An insertion hole 71a into which the output shaft 50a of the motor 50 can be inserted is formed in the center of the support member 71 so as to penetrate in the left-right direction. The connecting portion 52a of the rotating body 52 can also be inserted into the insertion hole 71a. Therefore, the rotating body 52 and the output shaft 50a of the motor 50 are connected within the insertion hole 71a.

The support member 71 has a support hole 71b into which the lock member 70 is inserted. The support hole 71b is formed closer to the front than the insertion hole 71a of the support member 71, and extends substantially horizontally in the depth direction of the image dimension measuring device 1.

The lock member 70 includes a rod-shaped portion 70a, a lock piece 70b, and a detected portion 70c. The rod-shaped portion 70a is a portion inserted into the support hole 71b of the support member 71, and is supported so as to be able to reciprocate in the depth direction of the image dimension measuring device 1 while being inserted into the support hole 71b. A portion that becomes an operation knob 70e that is operated by a user is provided on the base end side of the rod-shaped portion 70a. The operation knob 70e projects further to the front side than the support member 71. Moreover, since the lock member 70 is integrated with the housing 50 via the support member 71 with the rod-shaped portion 70a inserted into the support hole 71b, rotation around the rotation axis B is prevented.

The lock piece 70b is formed in the shape of a pin that protrudes to the right from the rear end of the rod-shaped portion 70a. The lock piece 70b can be inserted into the lock hole 52d of the rotating body 52. Specifically, the dimensions and position of the lock piece 70b in the left-right direction are set so that the right end part of the lock piece 70b does not interfere with the inner surface of the lock hole 52d, and the upper and lower sides of the lock piece 70b are set so that they do not interfere with the inner surface of the lock hole 52d. The vertical dimensions and position of the lock piece 70b are set so as not to interfere with the inner surface.

The locking member 70 is supported reciprocally by the support hole 71b, and therefore has two positions: an advanced position (indicated by a phantom line in FIG. 7 and a solid line in FIG. 9) and a retracted position (indicated by a solid line in FIG. 7 and an imaginary line in FIG. 9). ). When the lock member 70 is placed in the advanced position, the lock piece 70b is inserted into the lock hole 52d of the rotating body 52. Since the locking member 70 is integrated with the housing 51, rotation of the rotating body 52 with respect to the housing 51 is mechanically prohibited when the locking piece 70b is inserted into the locking hole 52d of the rotating body 52. Ru. This state is the locked state. "Mechanically prohibited" means that a rigid member such as the lock piece 70b engages with the engaging portion of the rotating body 52 and physically prevents rotation using the mechanical strength of both. For example, the structure may be such that a recess or hole provided on one side fits into a protrusion provided on the other side.

On the other hand, when the locking member 70 is placed in the retracted position, the locking piece 70b slips out from the locking hole 52d of the rotating body 52. As a result, the mechanical connection between the locking member 70 and the rotating body 52 is released, so that the rotating body 52 is allowed to rotate. This state is the unlocked state. That is, simply by reciprocating the locking member 70, the locking mechanism 7 can be easily switched between the locked state and the unlocked state.

The detected portion 70c extends from the rod-shaped portion 70a toward the back side of the image size measuring device 1. The tip of the detected portion 70c reaches further back than the insertion hole 71a of the support member 71. A lock detection sensor 72 is disposed in the support member 71 on the back side of the insertion hole 71a. The lock detection sensor 72 is a lock state detection unit that detects that the lock mechanism 7 is in a locked state, and can be configured with, for example, a photoelectric sensor.

When the lock member 70 reaches the advanced position, the tip of the detected portion 70c reaches the detection area of the lock detection sensor 72, and the lock detection sensor 72 outputs an ON signal. This makes it possible to detect that the lock mechanism 7 is in the locked state. On the other hand, when the lock member 70 is in the retreated position, the tip of the detected portion 70c comes out of the detection area of the lock detection sensor 72, and the lock detection sensor 72 outputs an OFF signal. This makes it possible to detect that the lock mechanism 7 is in the unlocked state. The lock detection sensor 72 may be a non-contact sensor or a contact sensor such as a limit switch.

A signal from the lock detection sensor 72 is output to the control unit 3. When the signal output from the lock detection sensor 72 is an ON signal, the control unit 3 determines that the lock mechanism 7 is detected to be in the locked state, and notifies the user that the lock mechanism 7 is in the locked state. inform. Specifically, characters, symbols, marks, etc. indicating that the lock mechanism 7 is in the locked state can be displayed as a pop-up on the display section (notification section) 16 to notify the user. Furthermore, it is also possible to notify the user that the lock mechanism 7 is in the locked state by audio output, and in this case, a speaker or the like can be used as the notification section.

In this embodiment, the operating direction of the locking member 70 is the depth direction, but is not limited thereto, and may be in the left-right direction or the up-down direction.

(Configuration of chuck mechanism 6)
FIG. 10 is a perspective view of the chuck mechanism 6 viewed from the right side, that is, the side that grips the object W to be measured. 11 and 12 are exploded perspective views of the chuck mechanism 6. FIG. 11 is a perspective view from the left side, including the rotating body 52, and FIG. 12 is a perspective view from the right side, not including the rotating body 52. be.

The chuck mechanism 6 includes a chuck main body 60 that is attached to and detached from the rotary body 52, first to third chuck claws 61 to 63 arranged to grip the object W to be measured from three directions, and first to third chuck claws. It includes an adjustment member 64 for changing the positions of 61 to 63, and a fastening member 80 for fastening and fixing the chuck body 60 to the rotating body 52. The chuck main body 60 is fastened and fixed to the rotating body 52 and is rotated by the motor 50 together with the rotating body 52 around the rotation axis B. Further, the chuck body 60 includes a holding member 65 that holds the first to third chuck claws 61 to 63, and a fastened member 69 that constitutes a fastened portion. The chuck body 60 according to the present disclosure may have any structure as long as it can be rotated by the motor 50 together with the rotating body 52 around the rotation axis. For example, the chuck body 60 may be composed of a plurality of members, or may be composed of a single member, or another A member may be interposed.

The holding member 65 has a guide plate part 65a that guides the first to third chuck claws 61 to 63 in the radial direction, and a boss part 65b to which the fastened member 69 is fixed, and these parts are integrated. ing. The boss portion 65b protrudes toward the left side from the left side surface of the member to be fastened 69. The axis of the boss portion 65b and the axis of the guide plate portion 65a are located on the rotation axis B (shown in FIG. 1). The guide plate portion 65a is provided with a first groove portion 65c, a second groove portion 65d, and a third groove portion 65e. These first to third groove portions 65c, 65d, and 65e extend radially in the radial direction and are spaced apart from each other in the circumferential direction. The ends of the first to third groove portions 65c, 65d, and 65e are open on the outer peripheral surface of the guide plate portion 65a.

The first to third chuck jaws 61 to 63 have first to third sliders 66 to 68, respectively. The first to third sliders 66 to 68 are inserted into the first to third grooves 65c, 65d, and 65e of the guide plate portion 65a, respectively, and extend in the longitudinal direction within the first to third grooves 65c, 65d, and 65e. It is a sliding member. The first to third chuck claws 61 to 63 are fixed to the right side surfaces of the first to third sliders 66 to 68, and protrude to the right from the guide plate portion 65a.

First to third convex portions 66a, 67a, and 68a are provided on the left side surfaces of the first to third sliders 66 to 68, respectively, so as to protrude toward the left side. The first to third convex portions 66a, 67a, and 68a protrude to the left side from the left side surface of the guide plate portion 65a.

By manually rotating the adjusting member 64 around the rotation axis B with respect to the chuck body 60, the first to third chuck claws 61 to 63 are aligned along the first to third grooves 65c, 65d, and 65e. This is a member for moving in the radial direction. That is, the adjustment member 64 is formed into a disk shape as a whole, and its axis is disposed on the rotation axis B. A boss insertion hole 64a into which a boss portion 65b is inserted is formed in the center of the adjustment member 64. With the boss portion 65b inserted into the boss insertion hole 64a, the adjustment member 64 is rotatably supported around the rotation axis B with respect to the boss portion 65b. As shown in FIG. 12, a spiral strip 64b is formed on the right side surface of the adjustment member 64 so as to protrude toward the right side. The spiral strip 64b extends in a spiral shape centered on the rotation axis B.

When the boss portion 65b is inserted into the boss insertion hole 64a of the adjustment member 64, the spiral strip 64b is engaged with the first to third convex portions 66a, 67a, and 68a of the first to third sliders 66 to 68. It has become. When the adjustment member 64 is rotated around the rotation axis B in this state, a force in the radial direction acts on the first to third sliders 66 to 68 by the spiral strip 64b, and as a result, the first to third sliders 66 -68 slide in the longitudinal direction within the first to third grooves 65c, 65d, and 65e. In other words, the first to third chuck claws 61 to 63 can be moved in the radial direction. Note that a spiral groove may be provided instead of the spiral strip 64b, and any mechanism that can convert rotational motion around the rotation axis B into linear motion in the radial direction may be used.

By changing the rotation direction of the adjustment member 64, the moving direction of the first to third chuck claws 61 to 63 can be changed. When the object to be measured W is to be gripped by the first to third chuck jaws 61 to 63, the adjustment member 64 may be rotated so that the first to third chuck jaws 61 to 63 move in a direction closer to each other. As a result, the object W to be measured, which is a shaft object, for example, can be gripped by the first to third chuck claws 61 to 63. On the other hand, when removing the measurement object W gripped by the first to third chuck jaws 61 to 63, the adjustment member 64 is rotated in the opposite direction to move the first to third chuck jaws 61 to 63 away from each other. Just move it.

The member to be fastened 69 is a disc-shaped member, and can be attached to the boss portion 65b of the holding member 65 using, for example, a retaining ring 81 or the like. In a state where the fastened member 69 is attached to the boss portion 65b, both are integrated and relative rotation is prevented. The axis of the fastened member 69 is located on the rotation axis B. The outer diameter of the fastened member 69 is set so that it can be inserted into the peripheral wall portion 52b of the rotating body 52 of the rotating unit 5.

As shown in FIGS. 11 and 12, the fastening member 80 is a so-called nut, and in this embodiment is formed of an annular member. The axis of the fastening member 80 is located on the rotation axis B, and a center hole 80a into which the boss portion 65b can be inserted is formed in the center of the fastening member 80. As shown in FIG. 11, a circular recess 80b is formed on the left side of the fastening member 80. A thread groove 80c is formed on the inner circumferential surface of the recess 80b, and is threaded into the thread of the peripheral wall portion 52b of the rotating body 53.

As shown in FIG. 10 and the like, the outer diameter of the adjustment member 64 is larger than the outer diameter of the fastening member 80. That is, when comparing the frequency of attachment and detachment of the measurement target W with the frequency of attachment and detachment of the chuck mechanism 6 in a general usage situation, the frequency of attachment and detachment of the measurement target W is higher. By increasing the size of the adjustment member 64 used when attaching and detaching the object W to be measured, the operability of the operator when attaching and detaching the object W to be measured is improved. In other words, by making the outer diameter of the fastening member 80 that is infrequently used small, the fastening member 80 is less likely to get in the way when attaching and detaching the object W to be measured.

Note that the outer diameter of the adjustment member 64 and the outer diameter of the fastening member 80 may be the same, or the outer diameter of the fastening member 80 may be larger.

(Another form of chuck mechanism)
The structure of the chuck mechanism can be changed according to the shape, size, and structure of the object W to be measured. The "structure" includes whether the measurement target object W is hollow or solid. FIG. 13 is a diagram showing a modification of the chuck mechanism. The chuck mechanism 600 of this modification is a chuck mechanism that grips a hollow measurement target W, and the members constituting the chuck mechanism 600 are the same as the chuck mechanism 6 shown in FIG. The mounting directions of 61 to 63 are reversed in the radial direction. As a result, with the tips of the first to third chuck jaws 61 to 63 placed inside the object W to be measured, the adjusting member 64 moves the first to third chuck jaws 61 to 63 in a direction to separate them from each other. The hollow object W to be measured can be grasped from inside. The chuck mechanism 6 shown in FIG. 10 is a chuck mechanism that grips a solid measurement object W, and the chuck mechanism 600 shown in FIG. 13 is a second chuck mechanism that grips a hollow measurement object W. Although not shown, the number of chuck claws of the chuck mechanism that grips the solid object W to be measured may be four or more.

Moreover, the chuck mechanism 700 shown in FIG. 14 has first and second chuck claws 601 and 602, and is a chuck mechanism that grips a box-shaped object W to be measured. That is, the guide plate portion 65a of the holding member 65 is formed with first and second groove portions 65f and 65g that extend in the radial direction. The first and second groove portions 65f and 65g are both formed to be located on the same straight line passing through the rotation axis B and orthogonal to the rotation axis B. The first slider 606 of the first chuck jaw 601 is inserted into the first groove 65f, and the second slider 607 of the second chuck jaw 602 is inserted into the second groove 65g. The first and second sliders 606 and 607 have a convex portion (not shown) that engages with the spiral strip 64b (shown in FIG. 12) of the adjustment member 64, and the diameter can be adjusted by rotating the adjustment member 64. can be moved in the direction.

By separating the first and second chuck claws 601 and 602 from each other, the hollow object W to be measured can be gripped. Further, by bringing the first and second chuck claws 601 and 602 of the chuck mechanism 700 close to each other, it is possible to grip the solid object W to be measured.

The first and second chuck claws 601 and 602 can be made of a metal material. Rubber 601a is fixed to the first chuck claw 601 on its contact surface with the object W to be measured, and rubber 602a is fixed to the surface of the second chuck claw 602 in contact with the object W to be measured. The rubbers 601a and 602a function as a non-slippery for the object W to be measured, and also function to prevent the object W to be measured from being scratched. In particular, when the object to be measured W is gripped horizontally by the first and second chuck claws 601 and 602, the support in the direction of gravity is lost. It is possible to suppress the falling off. Furthermore, when gripping an object W to be measured such as a die-cast product or a resin molded product, the object W to be measured is stabilized by providing the rubbers 601a and 602a. I can do it.

The method of fixing the rubber 601a to the first chuck claw 601 is not particularly limited, and for example, a baking (vulcanization adhesion) method can be used. By using this construction method, the rubber 601a becomes difficult to peel off from the first chuck claw 601. The method of fixing the rubber 602a to the second chuck claw 602 can be similar.

A chuck mechanism 800 shown in FIG. 15 is a chuck mechanism 700 shown in FIG. 14 in which the mounting directions of the first and second chuck claws 601 and 602 are reversed in the radial direction. When the outer diameter of the object W to be measured is small, a chuck mechanism 800 shown in FIG. 15 can be used.

(Common part of chuck mechanism)
As shown in FIG. 11, the rotating body 52 is a member on the housing 50 side, while the chuck mechanism 6 can be divided into a chuck common part and a chuck changing part. The chuck common part is a part common to all of the chuck mechanism 6 shown in FIG. 11, the chuck mechanism 600 shown in FIG. 13, the chuck mechanism 700 shown in FIG. 14, and the chuck mechanism 800 shown in FIG. 15. The chuck common part includes a part fastened to the rotating body 52, and the common part fastened to the rotating body 52 means that all of the chuck mechanisms 6, 600, 700, and 800 are placed on the rotating unit 5 side. This means that it can be easily attached and detached without making any changes, improving convenience.

On the other hand, the chuck changing section is a different part between the chuck mechanism 6 shown in FIG. 11 and the chuck mechanism 700 shown in FIG. 14. The chuck mechanism 6 and the chuck mechanism 700 have different numbers of chuck claws and also different numbers of grooves in the guide plate portion 65a.

(Software processing to improve measurement accuracy)
The position of the measurement target W when the rotation unit 5 rotates the measurement target W clockwise into a certain posture and the position of the measurement target W when the rotation unit 5 rotates the measurement target W into the same posture are determined. There may be deviations, and this deviation is called backlash.

During continuous measurement, the measurement target W is rotated in a fixed direction and measurement accuracy is not affected by backlash, but when setting the measurement, the measurement target W is rotated clockwise and counterclockwise. If the object W is rotated in the opposite direction in this way, the position of the object W to be measured may shift even at the same rotational angle position, and backlash may adversely affect measurement accuracy.

In this embodiment, when the user operates the operation unit 14 to start measurement, the measurement target object W is rotated in one predetermined direction and all elements are measured. This eliminates the influence of backlash and improves measurement accuracy. The angle of rotation in one direction can be set to about 90 degrees, for example.

In addition, the shake correction section 32 shown in FIG. This is a part that corrects dimensional errors caused by vibration of the object W. In other words, since the measurement results can be corrected using software, measurement accuracy can be improved without centering.

(Operations and effects of embodiments)
As explained above, according to the present embodiment, when attaching or detaching the measurement target object W, the user advances the locking member 70 of the locking mechanism 7 to the locked state, and the locking piece 70b is rotated. The rotating body 52 is inserted into the lock hole 52d of the body 52, and rotation of the rotating body 52 with respect to the housing 51 is mechanically prohibited. At this time, since the adjustment member 64 of the chuck mechanism 6 is located on the right side of the rotating body 52 and is not restricted from rotating by the lock mechanism 7, the adjustment member 64 is allowed to rotate. Thereby, the first to third chuck claws 61 to 63 can be moved in the radial direction by rotating the adjustment member 64, so that the object W to be measured can be attached or detached.

When the lock mechanism 7 is in the locked state, the user is notified of this via the display unit 16, so that the user can unlock the lock mechanism 7 before rotating the object W to be measured. This can prevent the user from attempting to rotate the measurement target W without knowing, forgetting, or noticing that it is in the locked state.

When the locking member 70 of the locking mechanism 7 is moved backward to put the locking mechanism 7 into the unlocked state, the locking piece 70b comes out from the locking hole 52d of the rotary body 52, and the rotation of the rotary body 52 is permitted. Also at this time, the adjustment member 64 of the chuck mechanism 6 is allowed to rotate. As a result, as shown in FIG. 1, the measurement target object W gripped by the chuck mechanism 6 is rotated around the rotation axis B that intersects the optical axis A of the imaging section 15, and the measurement target object W is set in a desired posture and imaged. The image can be taken by the section 15. The dimensions of each part are obtained based on the measurement object image generated by the imaging unit 15.

The embodiments described above are merely illustrative in all respects and should not be interpreted in a limiting manner. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention.

As described above, the image dimension measuring device according to the present invention can be used when rotating and measuring an object to be measured.

1 Image dimension measuring device 5 Rotation unit 6 Chuck mechanism 7 Lock mechanism 12 Stage 15 Imaging section 16 Display section (notification section)
32 Shake correction section 51 Housing 50 Motor 50a Output shaft 52 Rotating body 52b Surrounding wall section 52d Lock hole 55 Manual adjustment knob 56 Encoder (rotation amount detection section)
57 Processing circuit 60 Chuck bodies 61 to 63 First to third chuck claws 64 Adjusting members 65c, 65d, 65e First to third grooves 69 Fastened member (fastened part)
70 Lock member 71 Support member 72 Lock detection sensor (lock state detection section)
80 Fastening member A Optical axis B of imaging section Rotation axis W Measurement target

Claims (8)

In an image dimension measuring device that measures the dimensions of an object to be measured,
a stage for placing the object to be measured;
an imaging unit for capturing an image of the measurement object placed on the stage and generating a measurement object image;
a rotation unit that is attached to an end of the stage and has a housing that includes a built-in motor; and a rotating body that is rotated by the motor around a rotation axis that intersects with the optical axis of the imaging unit;
a chuck body that is fastened and fixed to the rotating body by a fastening member and rotated together with the rotating body around the rotation axis by the motor; and a chuck body that extends in the radial direction and is provided at intervals in the circumferential direction. A plurality of chuck claws are arranged to be slidable along a plurality of grooves , respectively, for gripping the object to be measured . a chuck mechanism having an adjustment member for moving the chuck claw in the radial direction along the groove;
A locked state in which rotation of the adjusting member is allowed while mechanically prohibiting rotation of the rotating body with respect to the housing, and an unlocked state in which rotation of the rotating body and rotation of the adjusting member are allowed. An image dimension measuring device comprising a switchable locking mechanism. The image dimension measuring device according to claim 1,
The chuck mechanism includes a first chuck mechanism having three or more chuck claws for gripping a shaft object, and a second chuck mechanism having two chuck claws for gripping a box object,
The chuck main body of the first chuck mechanism and the chuck main body of the second chuck mechanism are provided with a common fastened portion fastened to the rotating body. The image dimension measuring device according to claim 1 or 2,
The image dimension measuring device is characterized in that the chuck mechanism is configured to be able to change the mounting direction of the chuck claws. The image dimension measuring device according to any one of claims 1 to 3,
In the image dimension measuring device, the outer diameter of the adjustment member is larger than the outer diameter of the fastening member. The image dimension measuring device according to any one of claims 1 to 4,
A lock hole opening on the outer peripheral surface is formed in the rotating body,
The locking mechanism includes a locking member inserted into the locking hole, and a supporting member supporting the locking member with respect to the housing so as to be movable back and forth in a radial direction of the rotation shaft. . The image dimension measuring device according to any one of claims 1 to 5,
The rotation unit includes a manual adjustment knob, a rotation amount detection section that detects a rotation amount of the manual adjustment knob and outputs a detection signal according to the rotation amount, and a detection signal output from the rotation amount detection section. and a processing circuit that receives the received rotation amount, converts it into a rotation amount of the motor, and rotates the motor by the converted rotation amount. The image dimension measuring device according to any one of claims 1 to 6,
a shake correction unit that corrects a dimensional error caused by shake of the measurement target based on an image of the measurement target mounted on the chuck mechanism, which is imaged by the imaging unit while being rotated by the motor; An image dimension measuring device equipped with The image dimension measuring device according to any one of claims 1 to 7,
a lock state detection unit that detects that the lock mechanism is in a locked state;
a notification unit that notifies a user that the lock mechanism is in the locked state when the lock state detection unit detects that the lock mechanism is in the locked state and the user attempts to rotate the motor; An image dimension measuring device equipped with

Images