JP2001099604A - One-dimensional measuring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-dimensional measuring machine which can reduce influence of change with time to a minimum and detect relative displacement of both sliders, with simple constitution. SOLUTION: A switching means 50 consists of a first and a second contact pins 51, 52, a swinging lever 53 and an extension coil spring 54 as an energizing means, so that relative displacement of both sliders can be surely detected with simple constitution. When the second slider moves relatively to the first slider, the swinging lever 53 is swung in the state being in contact with the first contact pin 51 or the second contact pin 52, so that damage or breakage of the swinging lever 53 and the first and second pins 51, 52 can be prevented. Consequently, a probe is also protected. The first and second contact pins 51, 52 come into contact temporarily with the swinging lever 53 only when the first and second sliders move relatively in the case of measurement, so that influence of change with time can be reduced to a minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a measuring element provided so as to be able to move up and down in the vertical direction. The present invention relates to a one-dimensional measuring machine for measuring dimensions such as steps, holes, and axes.

[0002]

2. Description of the Related Art A stylus provided to be able to move up and down in a vertical direction is provided.
As a one-dimensional measuring device for measuring a dimension of an object to be measured, for example, a height, a step, a hole, a shaft, etc., for example, a linear distance measuring device disclosed in JP-A-6-123602 is known. .

[0003] This linear distance measuring device comprises a base, a column erected on the base, and a first slider having a tracing stylus provided vertically up and down along the column and in contact with an object to be measured. A displacement detecting means for detecting a height position of the first slider; a second slider provided on the first slider so as to be movable in the same direction as the direction of movement of the first slider; The first slider is held with respect to the second slider, and when a load equal to or more than a predetermined value acts between the sliders, the second slider is relatively moved with respect to the first slider, and the load is released. A constant-pressure mechanism for returning the first slider and the second slider to the initial position, and a driving device connected to the second slider for vertically moving the first and second sliders along the support column When the second slider relative to the first slider is configured to include a switch means for capturing the detection value of the displacement sensor operates when the relative movement.

In measurement, the drive mechanism is operated to move the first and second sliders up and down along the columns. When the tracing stylus abuts on the object to be measured, the first slider cannot move any more, so the second slider is moved relative to the first slider. Then
The switch means operates and the detection value of the displacement detection means is taken in. That is, the height position of the first slider when the tracing stylus abuts is detected. In this way, the dimensions of the measured object can be measured by sequentially measuring the measurement site of the measured object.

[0005]

By the way, as a switch means in the above-described measuring device, a resistance band is provided on the first slider along the moving direction thereof, and
The second slider is provided with a leaf spring whose tip slides on the resistance band, and when the resistance value of the resistance band up to the position where the leaf spring contacts reaches a predetermined value, the switch is activated.
There is known a configuration in which a detection value of a displacement detection unit is captured. However, in such a configuration of the switch means, since the leaf spring slides on the resistance band, the resistance value is liable to fluctuate due to the sliding. In other words, there is a problem that it is susceptible to aging.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, reduce the influence of aging as much as possible, and detect the relative displacement of both sliders with a simple configuration and reliably. Is to provide.

[0007]

According to the present invention, there is provided a one-dimensional measuring apparatus having the following structure to achieve the above object. The one-dimensional measuring device according to claim 1, wherein the first dimension measuring device includes a base, a column erected on the base, and a tracing stylus provided vertically up and down along the column and in contact with the object to be measured.
And a displacement detecting means for detecting a height position of the first slider, and a second slider provided on the first slider so as to be movable in the same direction as the moving direction of the first slider.
And the first slider is held with respect to the second slider, and when a predetermined load or more acts between the sliders, the second slider is relatively moved with respect to the first slider, and A constant pressure mechanism for returning the first slider and the second slider to the initial position when the load is released; and a constant pressure mechanism connected to the second slider for vertically moving the second slider along a column. A one-dimensional measuring machine comprising: a drive mechanism; and a switch unit that operates when the second slider relatively moves with respect to the first slider and captures a detection value of the displacement detection unit. A first contact pin and a second contact pin arranged on one of the first and second sliders at a distance in a moving direction of the slider;
A swing lever that is swingably supported by one of the first and second sliders and that is located at an intermediate position between the first contact pin and the second contact pin when a portion distant from the swing fulcrum is in a neutral state; And biasing means for holding the swing lever in a neutral state and allowing the swing lever to swing when the first and second sliders are relatively displaced. .

In such a configuration, when the second slider is moved up and down, for example, down along the column via the driving mechanism, the first slider is also moved in the same direction via the constant pressure mechanism. It is descended. Eventually, when the second slider is further lowered after the tracing stylus comes into contact with the object to be measured, the first slider cannot be further lowered, and acts between the first and second sliders. When the load exceeds a predetermined value, the second
Slider moves relative to the first slider (down)
Is done. When the swing lever comes into contact with the first or second contact pin due to this relative movement, the detected value of the displacement detecting means at that time is captured. That is, the height dimension of the measurement surface of the object to be measured with which the probe contacts is measured. Further, when the second slider moves (downs) relative to the first slider, the swing lever is swung in contact with the first or second contact pin. , The second contact pin can be prevented from being damaged or broken. This can also contribute to protection of the probe.

After the measurement, when the second slider is raised along the support via the driving mechanism, the swing lever is gradually returned to the neutral state by the action of the urging means,
Or move away from the second contact pin. Further, as the second slider is raised, the load acting between the first and second sliders is gradually released, and the first and second sliders are returned to the initial positions. You. That is, the second slider returns to the initial position of the first slider. Therefore, the first and second contact pins and the swing lever which constitute the switch means only temporarily come into contact with each other only when the first and second sliders are relatively moved during measurement. As compared with a structure in which the relative movement of the slider is detected while the spring slides, the influence of aging can be reduced as much as possible. In addition, the switch means is the first,
Since the slider can be constituted by the second contact pin, the swing lever and the urging means, the relative displacement between the two sliders can be reliably detected with a simple structure.

According to a second aspect of the present invention, in the one-dimensional measuring machine according to the first aspect, between the first contact pin and the swing lever and between the second contact pin and the swing lever. A switch portion is formed. According to such a configuration, since the switch portion is directly formed between the first contact pin and the swing lever and between the second contact pin and the swing lever, it is not necessary to separately provide a switch. It is possible to reduce the number of parts and cost.

According to the one-dimensional measuring device of the third aspect,
3. The one-dimensional measuring device according to claim 1, wherein the swing lever has a middle portion swingably supported by one of the first and second sliders, and
One end is located at an intermediate position between the first contact pin and the second contact pin in the neutral state, and the urging means makes the other end of the swing lever a straight line connecting the first contact pin and the second contact pin. It is characterized by being constituted by one tension coil spring that pulls in a direction perpendicular to the direction.

According to such a configuration, since the urging means is constituted by a single tension coil spring, it can be constructed extremely inexpensively and is easy to assemble. In addition, by selecting the spring force of the tension coil spring, the drag when the swing lever swings after the swing lever comes into contact with the first or second contact pin can be adjusted. Sometimes a moderate braking action can be provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. (Overall Configuration) FIG. 1 is an overall perspective view of a one-dimensional measuring device 1 of the present embodiment, and FIGS.
It is sectional drawing along the II-II line, the III-III line, and the IV-IV line.

The one-dimensional measuring machine 1 is provided with a base 11, a support 12 erected on the base 11, a vertically movable up and down direction along the support 12, and a tracing stylus 13 at a lower portion.
A first slider 14 having
4, a displacement detecting means 20 for detecting the height position of the first
A second slider 15 for vertically moving the first slider 14, a constant pressure mechanism 30 provided between the first and second sliders 14, 15, and a second slider 15 connected to the second slider 15. A drive mechanism 40 for raising and lowering the first slider 15 in the vertical direction along the column 12; and a switch means 50 which operates when the second slider 15 moves relative to the first slider 14 and captures the detected value of the displacement detection means 20.
A clamp mechanism 60 for integrating the first slider 14 and the second slider 15 with each other;
And a display operation unit 18 having a key input unit 17.

(First Slider 14) In FIG. 4, the first slider 14 is formed in a substantially U-shape.
A plurality of bearings 141 provided on the slider 14 are brought into contact with the front, rear, left, and right side surfaces of the support 12, so that the support 1 is
2 so as to be slidable in the vertical direction.

(Second Slider 15) In FIGS. 4 and 5, the second slider 15 is formed in a flat rectangular shape, and a plurality of bearings 142 provided on the first slider 14 are provided in the second slider 15. By being in contact with the front, rear, left and right side surfaces of the slider 15, the first
Is slidably attached to the slider 14. That is, the first slider 14 is slidably provided in the same direction as the direction in which the first slider 14 moves.

(Displacement Detecting Means 20) In FIGS. 3 and 4, the displacement detecting means 20 includes a scale 21 having an optical grid provided along
Detector 22 provided on the first slider 14 so as to face the
The displacement of the first slider 14 on the support 12 in the height direction is detected as an electric signal by the cooperation of the two.

(Constant-Pressure Mechanism 30) In FIG. 5, the constant-pressure mechanism 30 is used for a weight balance for urging the first slider 14 upward with a force equivalent to the total weight of the first slider 14 and the members added thereto. Tension spring 3 as urging means
1 and a cam member 3 having one end swingably provided on the first slider 14 and having a sliding groove 32A along the longitudinal direction.
2 and the sliding groove 32A provided in the second slider 15.
When a force greater than a predetermined force acts between the first and second sliders 14 and 15 in the direction of relative movement between the engagement pin 33 and the cam member 32 which are slidably engaged with the cam member 32 at the neutral position. And a tension spring 34 as a constant-pressure urging means for allowing the cam member 32 to swing.

The upper and lower ends of the tension spring 31 are connected to the upper part of the second slider 15 and the lower part of the first slider 14, respectively. Thus, the first slider 14 is supported by the second slider 15 via the extension spring 31. One end of the tension spring 34 is locked to the other end of the cam member 32, and the other end is locked to the first slider 14. Thus, the cam member 32 is constantly urged in the horizontal direction by the tension spring 34.

Now, the first and second sliders 14, 1
When no load equal to or more than a predetermined value is applied between the tension springs 5 (hereinafter, in a neutral state), as shown in FIG.
Since 1 is not extended, no relative movement occurs between them, and the cam member 32 is maintained at the neutral position which is kept horizontal. Therefore, when the second slider 15 is moved up and down in the vertical direction, the first slider 14 is also moved up and down in the same direction.

After the first and second sliders 14 and 15 are moved downward, for example, after the lower portion of the tracing stylus 13 of the first slider 14 abuts on the object to be measured (not shown),
Further, when the second slider 15 is lowered, the first slider 14 cannot be further lowered, so that a predetermined load or more is applied between the first and second sliders 14 and 15. Then, since the extension spring 31 is extended, a relative movement occurs between the first slider 14 and the second slider 15. Engagement pin 33 of second slider 15
Slides downward along the sliding groove 32A of the cam member 32 of the first slider 14, so that the cam member 32 swings downward against the tension spring 34 (FIG. 6C). reference). Conversely, the first and second sliders 14 and 15 are moved upward, and after the upper part of the tracing stylus 13 of the first slider 14 comes into contact with the object to be measured, the second slider 15 is further raised. Then, the cam member 32 swings upward against the tension spring 34 (see FIG. 6A).

When a predetermined load or more is released from between the first and second sliders 14 and 15, the cam member 32 is urged in the horizontal direction by a tension spring 34 so that the cam member 32 is in the neutral position. When returning (see FIG. 6B), the relative movement between the first and second sliders 14 and 15 is canceled. That is, the first slider 14 and the second slider 15
Are returned to the initial position.

(Driving Mechanism 40) In FIGS. 2 and 3, the driving mechanism 40 is wound around two pulleys 41 rotatably provided at the upper and lower ends of the column 12 along the rotation direction of the pulleys 41. And a handle 43 provided on the shaft of the pulley 41 at the lower end of the column 12. One end of the belt 42 is connected to the upper end of the second slider 15, and the other end is connected to the lower end of the second slider 15. By turning the handle 43, the second slider 15 moves up and down along the column 12. It is raised and lowered in the direction.

(Switch Means 50) In FIG. 7 and FIG. 8, the switch means 50 includes a first contact pin 51 and a second contact point which are fixed to the side surface of the second slider 15 and are vertically spaced from each other. A pin 52, a swing lever 53 provided to be swingable on the first slider 14, and when the swing lever 53 is held in a neutral state and the first and second sliders 14, 15 are relatively displaced. And a tension coil spring 54 as an urging means for allowing the swinging lever 53 to swing.

As shown in FIG. 8 in an enlarged manner, the swing lever 53 has a middle portion swingably attached to the first slider 14 by a pin 501 and a retaining ring 502, and one end of the swing lever 53 is provided with a first end. And the second contact pins 51 and 52. One end of the tension coil spring is connected to the other end of the swing lever 53 via a screw 503, and the other end is connected to a screw 5
The first slider 14 is rotatably attached to each of the first sliders 14 via a corresponding one of them. Thus, the swing lever 53 is always urged in the horizontal direction by the tension coil spring 54.

A switch section 55 is formed between the first contact pin 51 and the swing lever 53 and between the second contact pin 52 and the swing lever 53. At the moment when the first and second contact pins 51 and 52 come into contact with the swing lever 53, the switch section 55 is turned on and takes in the detected value of the displacement detecting means 20. Conversely, the first and second
While the contact pins 51 and 52 are not in contact with the swing lever 53, the switch unit 55 is in the off state, so that the detection value of the displacement detecting means 20 is not taken in. Also,
The dimension between the first contact pin 51 and the swing lever 53 and the dimension between the second contact pin 52 and the swing lever 53 are set to 3 mm or more, here 5 mm.

Now, in the neutral state, as shown in FIG. 9B, the first slider 14 and the second slider 15
Since there is no relative movement between the first and second contact pins, one end of the swing lever 53 is located in the middle of the first and second contact pins 51 and 52, and the neutral state is maintained. In this neutral state, the first and second contact pins 51 and 52 are not in contact with the swing lever 53, so that the displacement detecting means 20
Is not taken in.

When a predetermined load or more is applied downward between the first and second sliders 14 and 15, the constant pressure mechanism 30 causes relative movement between them. When the relative displacement due to the relative movement becomes 5 mm or more, the lower part of the first contact pin 51 comes into contact with the upper part of the swing lever 53, and subsequently, the swing lever 53 swings clockwise (FIG. 9 (c)). )reference).
When a predetermined upward load is applied between the first and second sliders 14 and 15, the constant pressure mechanism 30 causes relative movement between them. 5 relative displacement due to relative movement
mm, the upper portion of the second contact pin 52 comes into contact with the lower portion of the swing lever 53, and subsequently, the swing lever 53 swings counterclockwise (see FIG. 9A). Therefore, breakage of the switch means 50 can be prevented.

When the load is released from the first and second sliders 14, 15, the relative movement between them is canceled by the constant pressure mechanism 30, and the swing lever 53 is urged in the horizontal direction by the extension coil spring 54. The swing lever 5
3 returns to the neutral state (see FIG. 9B).

(Clamp Mechanism 60) FIGS. 10 to 12
, The clamp mechanism 60 includes a through hole 61 provided in the display operation section 18, a through hole 62 provided in the second slider 15 corresponding to the through hole 61, and a through hole 6 provided in the second slider 15.
2, an engaging hole 63 as an engaging hole provided in the first slider 14, a clamp pin 64 inserted through each through hole 61, 62 and engaged with the engaging hole 63. The display operation unit 18 and the second slider 1
5 and the clamp pin 64
And a clamp pin holding / advancing mechanism 65 for advancing the clamp pin 64 toward the engagement hole 63 of the first slider 14 when the is rotated by a predetermined angle.

The tip of the clamp pin 64 is formed in a tapered shape. Clamp pin holding advance mechanism 65
The positioning pin 651 protrudes from each other at right angles to the clamp pin 64, the guide cylinder 652 provided along the periphery of the through hole 62 of the second slider 15, and the clamp pin 64. A compression coil spring 653 is provided as urging means for urging the clamp pin 64 in a direction to advance toward the engagement hole 63 of the first slider 14. The guide cylinder 652 includes an outer peripheral wall 652 </ b> A provided along the peripheral edge of the through hole 62,
And a groove 652B formed along the axial direction of 2A. The compression coil spring 653 is
4 is provided between the display operation unit 18 and the stopper 654 provided at the intermediate portion.

Next, the operation of the present embodiment will be described. (Normal Height Measurement) For example, when measuring the height of an object to be measured (not shown), the measurement is performed as follows. When the second slider 15 is lowered by operating the handle 43 of the drive mechanism 40, the first slider 15 is moved through the constant pressure mechanism 30.
Slider 14 is also lowered in the same direction. Eventually, if the second slider 15 is further lowered after the tracing stylus 13 provided on the first slider 14 comes into contact with the object to be measured, the first slider 14 cannot be further lowered. , First and second sliders 14, 15
During this period, a load exceeding a predetermined level is applied. Then, the second slider 15 is moved by the constant pressure mechanism 30 to the first slider 14.
Is moved relative to (down). Eventually, when the relative movement amount becomes 5 mm or more, that is, in the switch means 50, the first fixed to the second slider 15
At the moment when the contact pin 51 comes into contact with the swing lever 53, the switch section 55 is turned on, so that the detected value of the displacement detecting means 20 is captured. That is, the height dimension of the measurement surface of the measured object with which the tracing stylus 13 contacts is measured.

(Scanning Measurement) At the time of scanning measurement, measurement is performed as follows. For example, the DUT (not shown)
When the inner peripheral surface of the hole is measured by scanning, the tracing stylus 13 is inserted into the hole, and in this state, the handle 43 of the drive mechanism 40 is
When the second slider 15 is lowered by operating the first slider 14, the first slider 14 is also lowered together in the same direction via the constant pressure mechanism 30. When the second slider 15 is further lowered after the tracing stylus 13 comes into contact with the inner wall of the hole, the first slider 14 cannot be further lowered. , 15
A load greater than a predetermined value is applied between them. Then, the constant pressure mechanism 30
As a result, the second slider 15 is moved relative to the first slider 14 (downward). Eventually, when the relative movement amount becomes 5 mm or more, that is, when the switch means 5
At 0, when the first contact pin 51 fixed to the second slider 15 is in contact with the swing lever 53, the switch section 55 is turned on, so that the detection value of the displacement detection means 20 is captured. . In this state, since the second slider 15 is lowered by 5 mm or more with respect to the first slider 14, the first slider 14 and the tracing stylus 1
3 is in a state where a downward force is applied by the constant pressure mechanism 30. Therefore, when the object to be measured or the one-dimensional measuring device 1 is moved in the horizontal direction in this state, the tracing stylus 13 is moved while being in contact with the inner wall of the hole. During this time, the detected value of the displacement detecting means 20 is taken in at a predetermined time interval. Therefore, by updating and storing the minimum value at that time, the lowest point position of the hole can be obtained. The internal diameter of the hole can be determined by taking the detection value when the 13 is raised and brought into contact with the upper part of the inner wall of the hole.

(Scribing work) Also, at the time of scoring work,
The operation is performed as follows. For example, when scribing an object (not shown), first, the tracing stylus 13 attached to the first slider 14 is replaced with a scriber (not shown) or the like. Next, when the second slider 15 is moved up and down by operating the handle 43 of the drive mechanism 40, the first slider 14 and the scriber are also moved up and down together in the same direction via the constant pressure mechanism 30. After setting the height position of the scriber to a desired position in this way, by fixing the handle 43 of the drive mechanism 40,
The position of the second slider 15 is fixed.

Next, the clamp pin 64 is moved to the display operation section 18.
And the positioning pins 651 of the clamp pins 64 are brought into contact with the peripheral end of the outer peripheral wall 652A of the second slide 15 (see FIG. 11). Since the clamp pin 64 is constantly urged by the compression coil spring 653 in a direction to advance toward the engagement hole 63 of the first slider 14, the clamp pin 64 is rotated by a predetermined angle, and the clamp pin 64 is rotated. By positioning the positioning pins 651 so as to correspond to the grooves 652B of the guide cylinder 652, the clamp pins 64 face the engagement holes 63 of the first slider 14 while aligning the positioning pins 651 along the grooves 652B. To advance.
As a result, the tip of the clamp pin 64 is engaged with the engagement hole 63 of the first slider 14 (see FIG. 12), and the display operation unit 18, the second slider 15, and the first slider 14 are integrated. Fixed to Thus, the second slider 15
And the first slider 14 are integrally fixed, so that the position of the scriber attached to the first slider 14 is also fixed. Then, while the scriber is pressed against the object, the object or the coordinate measuring machine 1 is moved in the horizontal direction to perform the scoring work.

According to the above-described embodiment, the following effects can be obtained. That is, since the constant pressure mechanism 30 is composed of the tension spring 31 as the weight balance urging means, the cam member 32, the engaging pin 33, and the tension spring 34 as the constant pressure urging means, The size can be reduced as compared with the case where the three tension coil springs are arranged in parallel with each other and over a predetermined length. In addition, when the second slider 15 moves up and down, the constant-pressure urging means for urging the cam member 32 in the horizontal direction is provided by one tension spring 3.
4, the measurement pressure when the second slider 15 moves up and the measurement pressure when the second slider 15 moves down can be made the same.

In the constant pressure mechanism 30, the engagement pins 3
With the one end of the cam member 32 being a pivot point and the tensile force acting on the other end of the cam member 32 by the tension spring 34, the performance of returning to the neutral position can be kept high.

In the switch means 50, the second slider 15 moves relative to the first slider 14 (down).
Then, the swing lever 53 is moved to the first or second contact pin 5.
Since the swing lever 53 and the first and second contact pins 51 and 52 can be prevented from being damaged or damaged, the swing lever 53 and the first and second contact pins 51 and 52 can be prevented. it can. Further, the first and second contact pins 51 and 52 and the swing lever 53 constituting the switch means 50 only temporarily come into contact with each other only when the first and second sliders 14 and 15 relatively move during measurement. Therefore, the influence of aging can be reduced as much as possible, as compared with the conventional structure in which the leaf spring slides on the resistance band and detects the relative movement of the slider. In addition, since the switch means 50 is constituted by the first and second contact pins 51 and 52, the swing lever 53 and the tension coil spring 54 as the urging means, the relative displacement between the sliders 14 and 15 can be simplified. With the configuration, it can be reliably detected.

In the switch means 50, the first contact pin 51
Since the switch portion 55 is formed directly between the swing lever 53 and the second contact pin 51 and between the swing lever 53, it is not necessary to provide a separate switch, reducing the number of parts and cost. You can measure down.

In the switch means 50, the swing lever 5
Since the urging means for urging 3 in the horizontal direction is constituted by one tension coil spring 54, it can be constructed extremely inexpensively and is easy to assemble. In addition, by selecting the spring force of the extension coil spring 54, the swing lever 53 is connected to the first or second contact pin 51,5.
Since the drag force when the swing lever 53 swings can be adjusted after coming into contact with the second slider 2, an appropriate braking action can be provided when the second slider 15 moves up and down.

Since the dimension between the first contact pin 51 and the swing lever 53 and the dimension between the second contact pin 52 and the swing lever 53 are set to 5 mm, the measuring element 13 contacts the workpiece. Since the detection value of the displacement detecting means 20 is taken in at the time when the impact and vibration at the time of contact are converged, stable measurement can be performed. That is, the dimensions of the object to be measured can be accurately measured without being affected by shock or vibration when the tracing stylus 13 contacts the object to be measured.

At the time of scanning measurement, the first slider 14
When the relative movement amount between the slider 15 and the second slider 15 becomes 5 mm or more, the switch means 50 is operated to capture the detected value of the displacement detecting means 20, and from that point on, the detected value of the displacement detecting means 20 becomes a predetermined value Since the values are taken at time intervals, if the minimum value of the taken detection values is obtained, the lowermost value of the hole can be obtained.

The first slider 1 is moved by the clamp mechanism 60.
4 and the second slider 15 can be integrated, so that after fixing the second slider 15 by fixing the drive mechanism 40, the first slider 14 and the second slider 15 are integrated. The first slider 1
The position of the tracing stylus 13 provided at 4 can be fixed. Therefore, for example, scribing can be performed by replacing the tracing stylus 13 with a scriber or the like and moving the object or the one-dimensional measuring device 1 in the horizontal direction while the scriber is pressed against the object. . Also,
During transportation, the relative movement between the first and second sliders 14 and 15 can be prevented by integrating the first slider 14 and the second slider 15. Obstacles to the constant pressure mechanism 30 and the like interposed therebetween can be reduced as much as possible.

The clamp pin 64 is inserted through the through-hole 62 of the second slider 15 so that the engagement hole 63 of the first slider 14
, The first slider 14 and the second slider 15 can be integrated, so that the above object can be achieved by the clamp mechanism 60 having a simple structure.

From the state where the clamp pin 64 is held in the through hole 62 of the second slider 15, the clamp pin 64 advances toward the engagement hole 63 of the first slider 14 by simply rotating the clamp pin 64 by a predetermined angle. Therefore, for example, a screw hole is cut in the second sliders 14 and 15, a clamp pin is screwed into the screw hole, and the clamp pin is advanced toward the engagement hole. 6
4 can be easily and quickly fixed to the first and second sliders 14 and 15, and the clamp pin 64 is moved by the clamp pin holding / advancing mechanism 65 during the scoring work or transportation. , 15 can be prevented.

By simply rotating the clamp pin 64 by a predetermined angle, the clamp pin 64 is advanced by the compression coil spring 653 as biasing means while the positioning pin 651 is advanced along the groove 652B of the guide cylinder 652. The clamp pin 64 can be advanced along the central axis of the through hole 62 and the engagement hole 63 and toward the engagement hole 63, so that the clamp pin 64 is easily engaged with the engagement hole 63. Can be.

Since the tip of the clamp pin 64 is formed in a tapered shape, the through hole 62 of the second slider 15 is formed.
Even if the center axis of the clamp pin 64 inserted into the first slider 14 and the center of the engagement hole 63 of the first slider 14 are slightly displaced from each other, the clamp pin 64 is moved to the engagement hole 63 of the first slider 14. Can be inserted securely.

It should be noted that the present invention is not limited to the above embodiment, and modifications and improvements as long as the object of the present invention can be achieved are included in the present invention. For example,
In the above embodiment, the constant pressure mechanism 30 includes a tension spring 31 as a weight balance urging unit, a cam member 32,
Although it is composed of the engaging pin 33 and the tension spring 34 as the constant pressure urging means, the constant pressure mechanism according to the present invention is not limited to this, and may be configured as follows.

13 and 14, the constant pressure mechanism 7
Numeral 0 denotes a tension spring 71 as a weight balance urging means similar to the constant pressure mechanism 30, a pair of leaf springs 72 provided on the first slider 14 at intervals in the vertical direction, and each leaf spring 72. And a pair of pressing pins 73 arranged on the second slider 15 in contact with the elastically deformable portion of the above, and a spring adjusting means 74 for simultaneously adjusting the spring pressure of the pair of leaf springs 72.
It is composed of

Each leaf spring 72 is formed in a substantially V-shape, and the central bent portion is fixed by a screw 72A so that it can be elastically deformed in the relative movement direction of the first and second sliders 14, 15. Are located in The pair of pressing pins 73 are provided at positions corresponding to the pair of leaf springs 72 at an interval in the up-down direction, respectively, and abut against one leg of each leaf spring or press with a same amount of force. are doing. On the other hand, the spring adjusting means 74 is disposed between the pair of leaf springs 71, and includes a plate 741 having a pair of adjustment pins 741 </ b> A at upper and lower ends for pressing the other leg of each leaf spring 71, respectively. And a pressing mechanism 742 for pressing in the horizontal direction. Pressing mechanism 742
Is a threaded portion 742A provided on the first slider 14.
And an adjusting screw 742B that penetrates the plate 741 and is screwed into the screwing portion 742A. By rotating the adjusting screw 742B, the plate 741 is pressed in the horizontal direction, and the pair of adjusting pins 741A of the plate 741 press the pair of leaf springs 71 in the horizontal direction. Are simultaneously adjusted (see FIG. 15).

In the neutral state, as shown in FIG. 13, there is no relative movement between the first and second sliders 14 and 15, so that when the second slider 15 is moved up and down, the first slider Slider 14 is also raised and lowered together in the same direction. As a result, no elastic deformation occurs or the same amount of elastic deformation occurs in the pair of leaf springs 72, so that the pair of leaf springs 72 have the same shape.

After the first and second sliders 14 and 15 are moved downward, for example, an object to be measured (not shown) is brought into contact with the lower part of the tracing stylus 13 of the first slider 14 and then further moved. When the second slider 15 is lowered, the first
Since the slider 14 cannot descend any further, a load more than a predetermined value is applied between the first and second sliders 14 and 15. Then, the tension spring 71 is extended, and a relative movement occurs between the first slider 14 and the second slider 15. Then, each pressing pin 73 of the second slider 15 is lowered, and the leaf spring 72 disposed below the first slider 14 is pressed downward (FIG. 16).
(A)). On the other hand, the first and second sliders 14 and 15 are moved upward,
After the object to be measured is brought into contact with the upper part of the tracing stylus 13, when the second slider 15 is further raised, each pressing pin 73 of the second slider 15 is raised, and the first slider 1 is moved.
The leaf spring 72 arranged on the upper side of 4 is pressed upward (see FIG. 16B).

When the load is removed from between the first and second sliders 14 and 15, the pair of leaf springs 72 press the pair of pressing pins 73 upward or downward in an attempt to return to a neutral state due to their elasticity. I do. As a result, the second slider 15 is pushed back, so that the relative movement between the first and second sliders 14 and 15 is eliminated, and the pair of leaf springs 7 are released.
2 returns to the neutral state (see FIG. 13).

According to the above-described modified example, since the tension spring 71 as the weight balance urging means, the pair of leaf springs 72, and the pair of pressing pins 73 are provided,
The size can be reduced as compared with a conventional configuration in which three tension coil springs are arranged in parallel with each other and over a predetermined length.

Since the spring pressure of the pair of leaf springs 72 can be adjusted simultaneously by one spring pressure adjusting means 74, the adjustment work is simple and economical. Further, in this modification, the spring pressure of the pair of leaf springs 72 is adjusted by one spring pressure adjusting means 74, but the present invention is not limited to this, and the spring pressure of the pair of leaf springs is adjusted. It may be provided with two spring pressure adjusting means for adjusting individually. In such a case, since the spring pressure of the pair of leaf springs can be adjusted individually, for example, the measurement pressure when the second slider rises and the measurement pressure when the second slider descends are different. If it does, you can easily fix it. Further, instead of providing the spring adjusting means 74 separately, for example, the spring pressure of the leaf spring may be adjusted by changing the degree of tightening of a screw for fixing each leaf spring.

In the above embodiment, the base 11 is formed in a substantially box shape. However, the base of the present invention is not limited to this. For example, the base 11 may be a base 81 as shown in FIG. Good. The base 81 is formed with a concave portion 81A which is open on the lower side. In the concave portion 81A, a shaft 811 provided in a vertical direction, and a lower surface provided on the shaft 811 so as to be slidable in the vertical direction. Has a sliding pad 812 provided in contact with a surface plate (not shown) or the like. A compression coil spring 811A is wound around the shaft 811. A lower friction coefficient member 812A formed by applying Teflon or the like is provided on a lower surface of the sliding pad 812 which is in contact with a surface plate or the like. Thus, by applying a force in the horizontal direction, the one-dimensional measuring machine can be moved with a relatively light force without using an air bearing mechanism or the like.

Each of the urging means of the above-mentioned embodiment is constituted by the tension springs 31, 34, the tension coil spring 54 and the compression coil spring 653, but the respective urging means according to the present invention is not limited to this. Instead, they may be made of various appropriate springs or rubbers that function as the respective urging means.

In the above embodiment, the dimension between the first contact pin 51 and the swing lever 53 and the dimension between the second contact pin 52 and the swing lever 53 are set to 5 mm. Not limited to this, at least 3m
m may be set to m or more. Also, the first contact pin 51
A switch section 55 is formed between the swing lever 53 and the second contact pin 52 and between the swing lever 53. For example, a separate switch may be provided. Are also included in the present invention. However, if a separate switch is provided, a problem such as an increase in the number of parts occurs. Therefore, the switch portion is formed between the first contact pin and the swing lever and between the second contact pin and the swing lever. It is desirable.

In the switch means 50 of the above embodiment, the first and second contact pins 51 and 52 are connected to the second slider 15.
Although the swing lever 53 and the extension coil spring 54 are provided on the first slider 14, the switch means according to the present invention is not limited to this, and the first and second contact pins are the first. The swing lever and the extension coil spring may be provided on the second slider, and the same effect as in the above embodiment can be obtained in such a case.

In the above-described embodiment, the tip of the clamp pin 64 is formed in a tapered surface shape, but may be formed in an appropriate shape capable of engaging with the engagement hole of the first slider. Such cases are also included in the present invention.

In the above embodiment, the clamp mechanism 60
Although it is configured to include the clamp pin holding / advancing mechanism 65, the clamp mechanism according to the present invention is not limited to this, and may not be configured to include the clamp holding / advancing mechanism. However, when the clamp advance mechanism is provided, the clamp pin can be easily and quickly fixed to the first and second sliders, and the first and second clamp pins can be fixed to the first and second sliders.
It is desirable to provide a clamp advance mechanism because it can effectively prevent the slider from coming off the slider.

[0062]

According to the one-dimensional measuring machine of the present invention, the influence of aging can be reduced as much as possible, and the relative displacement between the two sliders can be reliably detected with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a one-dimensional measuring machine according to the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a plan view showing a main part of the embodiment.

FIG. 6 is a plan view showing the operation of the constant pressure mechanism of the embodiment.

FIG. 7 is an enlarged sectional view showing the switch means of the embodiment.

FIG. 8 is an exploded perspective view of the switch unit of FIG. 7;

FIG. 9 is a plan view showing the operation of the switch means of FIG. 7;

FIG. 10 is an enlarged exploded perspective view showing the clamp mechanism of the embodiment.

11 is a sectional view showing a state before clamping of the clamp mechanism of FIG. 10;

FIG. 12 is a sectional view showing a state after clamping of the clamp mechanism of FIG. 10;

FIG. 13 is a plan view showing a modification of the constant pressure mechanism of the embodiment.

FIG. 14 is an enlarged exploded perspective view of a modification of FIG.

FIG. 15 is a plan view showing an operation (adjustment of a spring pressure) of a modified example of FIGS.

FIG. 16 is a plan view showing the operation (adjustment of the measured pressure) of the modified example of FIGS.

FIG. 17 is a sectional view showing a modification of the base of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1-dimensional measuring machine 11 Base 12 Post 13 Measuring element 14 First slider 15 Second slider 20 Displacement detecting means 30, 70 Constant pressure mechanism 31 Tension spring as biasing means for weight balance 32 Cam member 32A Sliding groove 33 Engagement pin 34 Tension spring as biasing means for constant pressure 40 Drive mechanism 50 Switching means 51 First contact pin 52 Second contact pin 53 Swing lever 54 Tension coil spring as biasing means 55 Switch section 60 Clamp mechanism 62 Penetration Hole 63 Engagement hole 64 Clamp pin 65 Clamp holding / advancing mechanism 71 Leaf spring 72 Press pin 73 Spring pressure adjusting means 651 Positioning pin 652 Guide cylinder 652A Outer wall 652B Groove 653 Compression coil spring as urging means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Kojima 2200 Shimoguri-cho, Utsunomiya-city, Tochigi F-term (reference) 2F061 AA02 AA31 AA33 DD04 DD22 FF07 FF33 FF52 FF61 FF72 GG01 GG36 HH02 HH96 JJ75 VV04 V21 AA02 AA41 AA43 CC04 CC22 EE01 EE62 GG52 GG69 GG71 HH05 HH13 HH21 HH32 LL09 MM06 MM08 MM12

Claims (3)

[Claims] A first slider having a base, a support standing upright on the base, and a tracing stylus provided vertically up and down along the support and in contact with an object to be measured;
A displacement detecting means for detecting a height position of the first slider; a second slider provided on the first slider so as to be movable in the same direction as the direction of movement of the first slider;
The first slider is held with respect to the second slider, and when a load equal to or more than a predetermined value acts between the sliders, the second slider is relatively moved with respect to the first slider, and the load is released. A constant pressure mechanism for returning the first slider and the second slider to the initial position when the first slider and the second slider are connected to the second slider, and a driving mechanism for vertically moving the second slider along the column. A switch which operates when the second slider relatively moves with respect to the first slider and captures the detected value of the displacement detecting means. The switch means comprises: A first contact pin and a second contact pin disposed on one of the second sliders at a distance in the moving direction of the slider; A swing lever that is swingably supported by the other or the other and that is separated from the swing fulcrum in a neutral state, and that is positioned between the first contact pin and the second contact pin in a neutral state; And a biasing means for allowing the swing lever to swing when the first and second sliders are relatively displaced. 2. The one-dimensional measuring device according to claim 1, wherein a switch portion is formed between the first contact pin and the swing lever and between the second contact pin and the swing lever. And a one-dimensional measuring machine. 3. The one-dimensional measuring device according to claim 1, wherein the swing lever has a middle portion swingably supported by one of the first and second sliders. And one end of which is located at an intermediate position between the first contact pin and the second contact pin in the neutral state, and the urging means connects the other end of the swing lever to the first contact pin and the second contact pin. A one-dimensional measuring machine comprising a single tension coil spring that pulls in a direction perpendicular to a straight line.