JP3147082U - Surface texture measuring machine - Google Patents

Abstract

The present invention provides a surface texture measuring machine that can eliminate the influence of camera shake as much as possible and realize stable measurement.
A surface texture measuring machine having a detector for detecting a displacement of a stylus according to a surface texture of a measurement object as a detection signal. The driving means 20 for linearly moving the detector 30 along the measurement direction, the measurement start switch 43, and the measurement start switch 43 are activated. The elapsed time from the activation is set to a preset time. A timer 51 for emitting a measurement start signal when the timer reaches the control means 60, and a control means 60 for driving the drive means 20 when the measurement start signal is issued from the timer 51.
[Selection] Figure 2

Description

  The present invention relates to a surface texture measuring machine. Specifically, the present invention relates to a so-called handy type surface texture measuring instrument that performs measurement by holding the measuring instrument main body by hand.

  In a state in which the stylus is in contact with the surface of the object to be measured, the stylus is moved along the surface of the object to be measured, and the displacement of the stylus in a direction intersecting (orthogonal to) the moving direction is detected. 2. Description of the Related Art A surface property measuring machine that measures the surface roughness and surface shape of an object to be measured is known. In particular, a so-called handy-type surface texture measuring instrument that measures by holding the measuring instrument main body by hand has also been proposed (see, for example, Patent Document 1).

  In the handy type surface texture measuring instrument, the stylus is positioned at the measurement position of the object to be measured while holding the measuring instrument main body by hand. In this state, a measurement start switch provided on the measuring machine main body is pressed. Then, since the stylus is moved along the surface of the object to be measured, the displacement of the stylus in the direction intersecting (orthogonal) to the moving direction is detected, and then the surface roughness of the object to be measured is detected from the displacement of the stylus. The sheath surface shape is calculated.

No. 4-24408

With conventional hand-held surface texture measuring instruments, measurement is performed while holding the measuring instrument body by hand, so when the measurement start switch is pressed, camera shake occurs, and the stylus position at the corner is misaligned from the measurement position. There is a problem that the measurement data is adversely affected.
In particular, the measurement start switch may not be visible when measuring the vertical surface, back surface, or cylindrical inner surface of the object to be measured, making it difficult to operate the measurement start switch. Therefore, the above-described problem is more likely to occur.

  An object of the present invention is to provide a surface texture measuring machine that can eliminate the influence of camera shake as much as possible and realize stable measurement.

  The surface texture measuring instrument of the present invention has a detector that detects the displacement of the stylus according to the surface texture of the object to be measured as a detection signal, and the object to be measured is moved while moving the detector along the surface of the object to be measured. A surface texture measuring instrument for measuring the surface texture of an object, which is activated and activated when a drive means for linearly moving the detector along a measurement direction, a measurement start switch, and the measurement start switch are operated. Time measuring means for issuing a measurement start signal when an elapsed time from a time reaches a preset time, and control means for driving the driving means when a measurement start signal is issued from the time measuring means It is characterized by that.

According to such a configuration, when the measurement start switch is operated, the time measuring means is activated. Then, in the time measuring means, the elapsed time from the start-up is timed, and a measurement start signal is issued when a preset set time is reached. When a measurement start signal is issued, measurement is started as a result of driving of the driving means by the control means.
Therefore, when a surface texture measuring machine is set on the measurement surface of the object to be measured, the measurement start switch is difficult to press, for example, when measuring the vertical surface, back surface, or cylindrical inner surface of the object to be measured in advance. After pressing the measurement start switch, set the surface texture measuring device according to the measurement position of the object to be measured, and the measurement will start automatically, eliminating the effects of camera shake as much as possible and ensuring stable measurement. realizable.

In the surface texture measuring machine of the present invention, it is preferable that the time measuring operation notifying means is provided, and the control means drives the time measuring operation notifying means while the time measuring means is activated.
Here, the timekeeping operation notifying means may be any means that can notify the measurer that the timekeeping means is being activated, and examples thereof include a means for emitting sound and a means for emitting light.
According to such a configuration, when the measurement start switch is operated and the time measuring means is activated, the time measuring operation notifying means is driven to notify the measurer that the time measuring operation is in progress. It is possible to confirm that the measurement is about to start by driving the timing operation notification means (sound or light). Further, when the driving of the time measuring operation notifying unit is stopped, it can be confirmed that the measurement is started.

In the surface texture measuring machine according to the present invention, it is preferable that the time measuring operation notifying means is constituted by a buzzer that emits a sound.
According to such a configuration, the measurer can confirm, by sound, that the time measuring means is activated, that is, the time measuring operation, so that the surface texture measuring machine such as the back surface of the object to be measured or the inner surface of the cylinder is The current situation can be confirmed accurately even during measurements that are not visible from the outside.

In the surface texture measuring instrument according to the present invention, the control means captures the detection signal from the detector as a surface texture measurement signal on condition that the detection signal from the detector has entered a preset specified value. Is preferred.
According to such a configuration, when the driving unit is driven and the detector is linearly moved in the measurement direction, the detection signal from the detector is captured. At this time, since the detection signal from the detector is taken in as a surface property measurement signal on condition that the detection signal from the detector has entered a preset specified value, stable measurement can be realized.

In the surface texture measuring instrument according to the present invention, the control means outputs the detection signal from the detector on condition that the fluctuation range of the detection signal from the detector is continuously maintained within a preset setting range for a predetermined time. It is preferable to capture the detection signal as a surface texture measurement signal.
According to such a configuration, when the driving unit is driven and the detector is linearly moved in the measurement direction, the detection signal from the detector is captured. At this time, since the detection signal from the detector is captured as the surface property measurement signal on condition that the fluctuation range of the detection signal from the detector is continuously maintained for a predetermined time within a preset setting range, Measurement can be realized.

A surface texture measuring machine according to an embodiment of the present invention will be described with reference to the drawings.
<Configuration of surface texture measuring instrument>
FIG. 1 is a perspective view showing an external appearance of a handy type surface texture measuring machine, and FIG. 2 is a diagram showing an internal mechanism of the measuring machine.
The surface texture measuring machine 1 of this embodiment is roughly composed of a drive detection unit 2 and a calculation display unit 3 that can store the drive detection unit 2.

As shown in FIG. 2, the drive detection unit 2 includes a detection unit case 10, a drive unit 20 provided in the detection unit case 10, and a detector that is linearly moved along the measurement direction by the drive unit 20. 30.
The drive means 20 includes a motor 21 as a drive source fixed to the detection unit case 10 and a feed connected to the motor 21 and arranged in parallel in the movement direction of the detector 30 in the detection unit case 10. The screw shaft 22 includes a nut member 23 screwed to the feed screw shaft 22 and a holding member 24 connected to the nut member 23 and detachably holding the detector 30.

  The detector 30 includes a detector main body 31 that is detachably held by the holding member 24 of the driving unit 20, a stylus arm 32 that is swingably supported at the tip of the detector main body 31, and the stylus arm 32. A stylus 33 projecting at a right angle to the axis of the stylus arm 32 at the tip, and a detection element 34 for detecting the amount of oscillation of the proximal end of the stylus arm 32 in the detector main body 31 are provided. When the stylus 33 moves along the surface of the measurement site of the object to be measured, the stylus 33 is moved up and down by the surface property of the object to be measured, here, the surface roughness. Then, the vertical movement of the stylus 33 is detected as a detection signal by the detection element 34, and the surface roughness of the object to be measured is determined from the detection signal accompanying the vertical movement and the moving distance of the stylus 33 (distance in the left-right direction in FIG. 2). Measured.

  As shown in FIG. 1, the calculation display unit 3 includes a storage case 40 that is large enough to store the drive detection unit 2 from above. The storage case 40 has a rectangular parallelepiped shape with a width dimension that can be grasped with one hand, and the lower surface is opened to store the drive detection unit 2.

  As shown in FIG. 3, on the upper surface of the storage case 40, a liquid crystal display 41, a power on / off switch 42, a measurement start switch 43, and a roughness parameter changeover switch 44 are arranged on the first half side, and slide on the second half side. A cover 45 is slidably mounted in the front-rear direction. Various setting switches 46 and a mode changeover switch 47 are arranged directly below the slide cover 45. The setting switch 46 can be used to make detailed settings when measuring the surface properties. In addition, the timer can be switched on and off in the state where the mode change switch 47 is switched to the timer setting mode, and the timer start time setting mode can be set using the mode change switch 47. The timer activation time can be set in the switched state.

  As shown in FIG. 2, the storage case 40 includes a storage device 50, a timer 51 as a timekeeping means, a buzzer 52 as a timekeeping operation notifying means, and the like, and a display 41 and various switches 42 to 44. , 46, 47 are connected to the control means 60. The timer 51 previously stores a timer activation time (set time), and is activated by the control means 60 when the measurement start switch 43 is operated in the timer-on state, and measures the elapsed time from the activation. When the elapsed time reaches a preset timer start time, a measurement start signal is issued.

  The control means 60 drives the drive means 20 when the measurement start switch 43 is operated, or when a measurement start signal is issued from the timer 51 in the timer-on state, and is moved by the drive means 20. The detection signal from the detector 30 is taken as a surface property measurement signal and stored in the storage device 50. At this time, the detection signal from the detector 30 is taken in as a surface property measurement signal as a condition that the detection signal from the detector 30 has entered a preset specified value.

<Operation and effect of surface texture measuring instrument>
The starting time of the timer 51 is set in advance. For example, when the mode changeover switch 47 is operated to switch to the timer activation time setting mode, the state of FIG. Here, an arbitrary timer start time (set time) is input by the setting switch 46. For example, when “10” seconds are input, the input timer activation time is set in the timer 51.
Next, when the mode selection switch 47 is operated to switch to the timer setting mode, the display 41 displays the state shown in FIG. Here, when “ON” is designated by the setting switch 46, the timer is turned on.

  In measurement, when the measurement start switch 43 is pressed before setting the surface texture measuring instrument 1 to the measurement position of the object to be measured, the timer 51 is started. That is, the timer 51 measures the elapsed time from the start. At the same time, the buzzer 52 is driven and a sound is emitted. Therefore, the measurer can confirm that the timer 51 is activated by the sound from the buzzer 52, and the surface texture measuring instrument 1 is measured at the measurement position of the object to be measured while the buzzer 52 is emitting sound. Therefore, it can be used as a guide when setting the surface texture measuring instrument 1.

During this time, the surface texture measuring instrument 1 is grasped with one hand and set at the measurement position of the object to be measured. For example, the surface texture measuring instrument 1 is set and maintained in this posture so that the stylus 33 is in contact with a measurement position such as a vertical surface, a back surface, or an inner surface of a cylinder.
Eventually, in the timing operation of the timer 51, when the elapsed time reaches a preset timer activation time (set time), a measurement start signal is issued. Then, the control unit 60 receives the measurement start signal and drives the driving unit 20. When the driving means 20 is driven, the detector 30 is moved while being in contact with the surface of the object to be measured, so that the stylus 33 is displaced according to the surface property of the object to be measured. Then, the displacement of the stylus 33 is taken into the control means 60 as a surface property signal, and measurement is performed.

  Therefore, when the surface texture measuring instrument 1 is set on the measurement surface of the object to be measured, the measurement start switch 43 is difficult to press, for example, the vertical surface, the back surface of the object to be measured, or the inner surface of the cylinder. Since the measurement is automatically started simply by pressing the measurement start switch 43 in advance and setting the surface texture measuring instrument 1 according to the measurement position of the object to be measured, the influence of camera shake is eliminated as much as possible. Stable measurement can be realized.

Further, when the measurement start switch 43 is operated and the timer 51 is activated, the buzzer 52 as the time measuring operation notifying means is driven, and the measurer can be informed by the sound that the timer is being activated.
Therefore, since the measurer can confirm that the timer is being activated by sound, the current situation can be accurately confirmed even when the surface texture measuring instrument 1 such as the back surface of the object to be measured or the inner surface of the cylinder is not visible from the outside. Can be confirmed. Further, when the driving of the buzzer 52 is stopped, it can be confirmed that the measurement is started.

  Further, when the driving unit 20 is driven and the detector 30 is linearly moved in the measurement direction, a detection signal from the detector 30 is captured. At this time, since the detection signal from the detector 30 is taken in as a surface property measurement signal as a condition that the detection signal from the detector 30 has entered a preset specified value, stable measurement can be realized.

<Modification>
The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
For example, instead of the timer 51, the control unit 60 may measure the elapsed time after the measurement start switch 43 is operated in the loop processing of the program. That is, the control means 60 may serve as a time measuring means.

  In the above embodiment, when the measurement start switch 43 is operated and the timer 51 is activated, the buzzer 52 is driven to notify the measurer that the timer is being activated by sound. Not limited. For example, a light emitting unit that emits light (flash) may be used.

Further, the control means 60 takes in the detection signal from the detector 30 as the surface property measurement signal on condition that the detection signal from the detector 30 has entered a preset specified value. I can't. For example, the detection signal from the detector 30 is captured as the surface property measurement signal on condition that the fluctuation range of the detection signal from the detector 30 is continuously maintained for a predetermined time within a preset setting range. Also good.
Even in this case, the detection signal from the detector 30 is used as the surface texture measurement signal on condition that the fluctuation range of the detection signal from the detector 30 is continuously maintained for a predetermined time within the preset setting width. Since it is captured, stable measurement can be realized.

  Moreover, although the drive means 20 was comprised with the motor 21, the feed screw shaft 22, the nut member 23, and the holding member 24, it is not restricted to this. An air or hydraulic cylinder may be used as a drive source, and the detector may be linearly moved by this cylinder.

  Further, the detector 30 is not limited to a contact type detector, and may be a non-contact type detector. As the non-contact type detector, an optical type, a magnetic type, a capacitance type, or the like may be selected according to the measurement site or measurement item of the object to be measured.

  The present invention can be used for a surface shape measuring machine in addition to a surface roughness measuring machine.

The perspective view which shows the surface texture measuring machine which concerns on this embodiment. Schematic which shows the internal structure of embodiment same as the above. The perspective view of the state which slid the cover of the calculation display part of embodiment same as the above. The figure which shows the state at the time of timer starting time setting mode in embodiment same as the above. The figure which shows the state at the time of timer setting mode in embodiment same as the above.

Explanation of symbols

1 ... Surface texture measuring machine,
2 ... Driving means,
3 ... calculation display part,
20: Driving means,
30 ... detector,
33 ... Stylus,
43 ... Measurement start switch,
51. Timer (time measuring means),
52 ... Buzzer (time measuring operation notifying means),
60: Control means.

Claims (5)

A surface property that has a detector that detects the displacement of the stylus according to the surface property of the object to be measured as a detection signal, and measures the surface property of the object to be measured while moving the detector along the surface of the object to be measured. A measuring machine,
Driving means for linearly moving the detector along the measurement direction;
A measurement start switch;
Time measuring means that is activated when the measurement start switch is operated, and that emits a measurement start signal when an elapsed time from the activation reaches a preset setting time;
And a control means for driving the driving means when a measurement start signal is issued from the time measuring means. In the surface texture measuring machine according to claim 1,
Having timekeeping operation notification means,
The surface texture measuring machine characterized in that the control means drives the timing operation notifying means while the timing means is activated. In the surface texture measuring machine according to claim 2,
The timekeeping operation notifying means is constituted by a buzzer that emits a sound. In the surface texture measuring instrument according to any one of claims 1 to 3,
The surface texture measuring machine characterized in that the control means takes in the detection signal from the detector as a surface texture measurement signal on condition that the detection signal from the detector has entered a preset specified value. In the surface texture measuring instrument according to any one of claims 1 to 3,
The control means captures the detection signal from the detector as a surface property measurement signal on condition that the fluctuation range of the detection signal from the detector is continuously maintained within a preset setting range for a predetermined time. A surface texture measuring machine characterized by that.

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