JPH07260473A - Wire-type multidimensional measuring apparatus - Google Patents

Abstract

PURPOSE:To obtain a wire-type multidimensional measuring apparatus which is low-cost, whose versatility is high and which can perform a coordinate measurement simply and with high accuracy. CONSTITUTION:A measuring probe 2 is situated in a point, to be measured, on an object 100 to be measured. The position of the measuring probe 2 is specified on the basis of values of individual encoders A, B, the position of the measuring probe 2 is operated by an arithmetic device 3, and the position is displayed on a display device 4. A measuring range can cover the whole range in which a wire W can be stretched, the wire W can be stretched freely within the measuring range, and it is not required to especially select the shape and the size of the object to be measured. In addition, every wire W is always energized to a take-up side, every wire W is shrunk when a hand is detached from the measuring probe 2, every wire W and the measuring probe 2 are housed to the side of a measuring-instrument body 1, and the wire-system multidirectional measuring apparatus can be carried conveniently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to dimensional measurement and inspection of plate-like or columnar members such as metal plates, building materials and signboards or scribing work, and dimensional measurement and inspection of various mechanical structures such as bicycle frames. The present invention relates to a wire-type multidimensional measuring device that can be used for work or for movement control of a machine tool such as a radial drilling machine.

[0002]

2. Description of the Related Art Conventionally, a measuring device for a two-dimensional plane or the like used in the field of machining, for example, is disclosed in Japanese Patent Publication No. 59-11.
As disclosed in Japanese Patent Publication No. 845 etc., a rail extending in the X-axis (horizontal) direction and the Y-axis (longitudinal) direction is run above the measurement region, and a cursor serving as a tracing stylus is arbitrarily placed along the rail. It is generally configured to be able to move to coordinates.

[0003]

However, in the rail type as described above, the measuring range (stroke) is limited, it is difficult to measure all kinds of items from small to large ones, and it is not portable, and it is versatile. However, there is a problem that the device becomes very expensive.

For this reason, in the case where the line changes frequently, or in the case of a small-to-medium-sized production line, it is the actual situation that the operator manually measures the measuring points with a ruler, a tape measure, etc. Even for a person, it is extremely difficult to perform measurement within a measurement error of a few millimeters, and the measurement error is large, and there is a problem that a beginner takes a very long time for measurement. That is, for example, in the case of measuring a planar object, the method of first measuring the X-axis (horizontal) direction and then measuring the Y-axis (longitudinal) direction is unavoidable, and the number of measurements is large. However, it is necessary to take various considerations such as whether or not the squareness is present, and there is a problem that the measurement is complicated and a large error is included in the measurement result.

A main object of the present invention is to provide a wire-type multidimensional measuring device which is inexpensive, has high versatility, and is capable of simple and highly accurate measurement.

[0006]

In order to achieve the above-mentioned main object, the invention according to claim 1 refers to the stretching length of the wire W which is always biased toward the winding side, as shown in FIG. Equipped with multiple encoders A, B ...
The encoders A, B, ... Are arranged in the measuring instrument main body 1 by mutually displacing the stretching start ends of the wires W, and the stretching tip ends of the wires W are bundled together to form a tracing stylus 2. On the other hand, a calculator 3 for calculating the position of the tracing stylus 2 based on the outputs of the encoders A, B, ... And a display 4 for displaying the calculation result are provided.

According to the second aspect of the present invention, the wire W can be smoothly stretched by following the tracing stylus 2 positioned at an arbitrary coordinate, provided that the measurement is performed on a two-dimensional plane. So there are two encoders,
Two-dimensional plane X- for measuring the first and second wires Wa, Wb respectively provided in the first and second encoders A, B
It was decided to extend the rotating bodies 5 and 5 which rotate around the axis perpendicular to Y, respectively.

According to a third aspect of the invention, encoders A and B are provided.
A winding drum D for winding each wire Wa, Wb on itself,
When the invention according to claim 2 is realized,
The rotating bodies 5 and 5 are wound onto the winding drums D and D of the respective wires Wa and Wb.
This is not used for both wires, but for each wire Wa, Wb
And the rollers Ra and Rb provided separately from the take-up drums D and D.

According to a fourth aspect of the present invention, in the third aspect of the invention, the heights of the stretched portions of the wires Wa and Wb are made uniform so that the values a and b of the encoders A and B can be more accurately obtained. V-shaped groove portions 50 are provided on the outer peripheral portions of the rollers Ra and Rb so as to make the heights of the stretched portions of the wires Wa and Wb uniform.

According to a fifth aspect of the present invention, in the two-dimensional plane measurement according to any of the second to fourth aspects, the arithmetic unit 3 is configured to perform a specific arithmetic operation.
1, 32, 33, 34 are provided.

A. In a triangle in which the pitch p of the rotating bodies 5 and 5 is the base and the values a and b of the first and second encoders A and B are the remaining two sides, one side equal to the value a of the first encoder A is The angle obtained by adding π / 2 radian to the angle formed by the initial value of the plane angle K1 formed by the line segment connecting the point where the first wire Wa separates from the rotating body 5 and the center of the rotating body 5 with respect to the base. If there is, the first calculation means 31 for obtaining this angle 31 b. From the virtual separation point x1, y1 of the first wire Wa determined by the plane angle K1 to the rotating body 5, the virtual separation point x1,
On the tangent line of the rotary body 5 passing through y1, a point separated by a first straight line length L1 obtained by subtracting the arc portion c1 wound around the rotary body 5 from the value a of the first encoder A is a virtual point of the probe 2. Assuming that the coordinates are x2 and y2, the second calculation means 32 for obtaining these coordinates c. From the value b of the second encoder B, the virtual coordinate x
Second computing means 33 for obtaining a difference sub = b-L5-c2 obtained by subtracting the back-calculated value L5 + c2 of the second encoder B, which is back-calculated based on 2,2. When the difference sub is within the small allowable range, the coordinates of the probe 2 for obtaining the virtual coordinates x2 and y2 are used. When the difference sub deviates from the small allowable range, a value obtained by dividing the difference sub by the first straight line length L1 is used. The invention according to claim 6, wherein the fourth arithmetic means 34 is configured to add to the current plane angle and to repeatedly perform the arithmetic operations of the second arithmetic means 32 and thereafter by the added plane angle K1. Therefore, the arithmetic unit 3 is provided with an origin setting mechanism 35 for arbitrarily setting and changing the coordinate origin based on the position information of the probe 2.

In order to grasp the pitch between two points, the arithmetic unit 3 is provided with a pitch calculating means 36 for calculating the pitch between two different points of the probe 2. I made it up.

In order to grasp the angle between the two straight lines, the arithmetic unit 3 has the first straight line connecting the two points touched by the probe 2, and the first straight line intersecting the first straight line. The angle calculation means 37 for calculating the angle between the contact point and the second straight line connecting the two points is provided.

According to a ninth aspect of the present invention, the shape information of the object to be measured is generated in the computing unit 3 based on the position information touched by the probe 2 a plurality of times so that the shape of an arbitrary contour can be grasped. The configuration is such that the shape information generating means 38 is provided.

According to the tenth aspect of the present invention, in order to grasp the center coordinates of an arbitrary hole, the center coordinates of a circle inscribed with a triangle having three vertices touched by the probe 2 are calculated by the calculator 3. The center calculation means 39 is provided.

According to the eleventh aspect of the present invention, in order to easily perform the quality inspection of the product, the calculator 3 is connected to the probe 2.
The inspection unit 40 for determining whether or not the touched position is within the input tolerance is provided.

According to the twelfth aspect of the present invention, an operator who operates the probe 2 at an arbitrary position gives an instruction of calculation and display from the position of the probe 2 to the measuring instrument body 1 side, and the measurement work can be further reduced. In order to do so, the structure is provided with a remote controller 6 which is separated from the measuring device main body 1 and remotely operates the computing unit 3 and the display unit 4.

According to the thirteenth aspect of the present invention, in order to easily and satisfactorily perform the scribing work, the scribing means 7 is detachably attached to the probe 2.

According to the invention of claim 14, in order to prevent slack in the winding side of the wire W favorably and further improve the measurement accuracy, in the invention of claim 1 or 2, each wire W is The moving pulleys 201 and 202 are interposed between the fixed end of the measuring device body 1 and the stretching start end portion, respectively, so that they can be stretched and wound, respectively, and the encoders A and B can be moved by Pulley 201,
A linear scale SS for detecting the linear movement length of the wire 202 is used, while a biasing means 30 for biasing each wire W to the winding side is applied to the support body 200 of the movable pulleys 201 and 202.
The configuration is such that 0 is attached.

According to a fifteenth aspect of the present invention, in the invention according to the fourteenth aspect, in order to secure a sufficient stretched length of the wire W from the measuring device main body 1, there are a plurality of movable pulleys 201 and 202, and Fixed pulley 20 arranged on the fixed end side
The wire W is reciprocated a plurality of times between the wire 3 and the wire 3.

The sixteenth aspect of the invention is the invention of the fourteenth aspect or the fifteenth aspect, wherein the moving pulleys 201, 202 are provided.
Irrespective of the movement position of the moving pulleys 201 and 202, the biasing means 300 vertically suspends the weight 30 so as to apply a constant biasing force to the moving pulleys 201 and 202 to smoothly stretch the wire W.
1 is provided.

According to a seventeenth aspect of the present invention, in order to achieve the above main object by performing calculation and display thereof in combination with another system such as a personal computer, a wire W that is always biased to the winding side is provided. A plurality of encoders A, B, ... That encode and output the stretched length are provided, and these encoders A, B ,. Along with
Extending each wire W and bundling the tip ends together
I made it the configuration.

[0023]

According to the first aspect of the invention, the tracing stylus 2 is positioned at a point to be measured on the object to be measured. The positions of the probe 2 are specified by the values a, b, ... Of the plurality of encoders A, B ..., That is, the length of each wire W, and the value a of each encoder A, B. The position of the probe 2 can be calculated from b ..., By displaying this on the display 4,
The position of the tracing stylus 2 can be easily and highly accurately measured by one operation. Further, the measuring range can cover the entire range in which the wire W can be stretched, and the wire W can be freely stretched within the measuring range, so that the shape and size of the object to be measured are not particularly selected. Moreover, each wire W is always urged toward the winding side, and when the hand is released from the tracing stylus 2, the wires W contract and the wires W and the tracing stylus 2 are stored in the measuring instrument body 1 side. Also, it does not require a cursor moving rail as in the past and is convenient to carry.

According to the second aspect of the present invention, regardless of the position of the probe 2, each of the wires Wa and Wb to be stretched always separates from the circumference of each of the rotating bodies 5 and 5, and the arbitrary coordinates are set. The wire W can be smoothly stretched by following the probe 2 to be positioned, and the values a and b of A and B can be accurately obtained.

In the third aspect of the invention, the roller R is a separate body.
With a and Rb, the same effect as that of the second aspect can be obtained.

In the invention according to claim 4, each wire Wa,
Since wb is stretched through the V-shaped groove 50 and the heights of the stretched portions of the wires Wa and Wb are made uniform, the values a and b of the encoders A and B can be more accurately obtained.

According to the invention of claim 5, each wire Wa,
When Wb is stretched through rotating bodies 5 and 5 which rotate around an axis perpendicular to the two-dimensional plane XY to be measured, and the values a and b of the encoders A and B are accurately output On the other hand, on the other hand, an arc portion wound around the rotating bodies 5 and 5 is generated on the wires Wa and Wb, which complicates the calculation. However, the first to fourth calculation means 31, 32, 33, and 34 cause The position 2 can be calculated concretely, and the complexity of the calculation due to the arc portions of the wires Wa and Wb can be cleared.

In the sixth aspect of the present invention, the origin setting mechanism 35 can arbitrarily set the reference of the coordinates to be obtained.

In the invention according to claim 7, the pitch calculation means 36 can grasp the pitch between two different points of the tracing stylus 2.

In the invention described in claim 8, the angle calculation means 3
With 7, it is possible to grasp the angle between any two straight lines.

In the ninth aspect of the invention, the shape information generating means 38 can grasp the contour of an arbitrary shape.

In the tenth aspect of the invention, the center calculation means 39 can grasp the center coordinates of an arbitrary hole.

In the eleventh aspect of the invention, the inspection means 40
Thereby, the quality inspection of the product can be easily performed.

According to the twelfth aspect of the present invention, the operator who operates the probe 2 can give an instruction for calculation and display to the measuring instrument body 1 side by the remote controller 6 while being at the position of the probe 2. The measurement work can be further reduced.

According to the thirteenth aspect of the present invention, the scribing work can be performed easily and satisfactorily by attaching the scribing means 7 to the probe 2.

In the fourteenth aspect of the present invention, the drawing and winding of each wire W is performed by the movable pulleys 201 and 202 interposed between the fixed end of the measuring device body 1 and the drawing start end.
Unlike the one in which each wire W is wound around the winding drum, each wire W is tensioned by the linear movement of the movable pulleys 201 and 202 against the biasing means 300. It can be expanded and contracted in a closed state, and slack in each wire W can be effectively prevented. Then, the wire W can be formed without causing such a slack.
Since the linear movements of the movable pulleys 201 and 202 that expand and contract are detected by the encoders A and B composed of the linear scale SS, the measurement accuracy can be further improved.

According to the fifteenth aspect of the invention, since the wire W is reciprocated a plurality of times between the plurality of movable pulleys 201, 202 and the constant pulley 203, the movable pulleys 201, 202 are supported. The wire W can be stretched long by a small movement of the body 200, and the stretched length of the wire W can be sufficiently secured even if the moving length of the support body 200 of the movable pulleys 201 and 202 is short.

According to the sixteenth aspect of the invention, the biasing means 30 is provided.
Since the weight 301 that hangs 0 in the vertical direction is provided, a constant biasing force can be constantly applied regardless of the position of the moving body 200 of the moving pulleys 201 and 202, and the wire W can be smoothly stretched. be able to.

In the seventeenth aspect of the invention, the same operation as that of the first aspect of the invention can be achieved by combining with another system such as a personal computer.

[0040]

1 shows the present invention applied to measurement of a two-dimensional plane XY targeting an object to be measured 100 such as a plate. A wire W wound on the winding drum D by a biasing means such as a spring.
And two encoders A and B for encoding and outputting the stretched length of the wire W. The first encoder A and the second encoder B are provided with the encoders A and B, respectively.
Substrate 1 of measuring device main body 1 by displacing the stretching start end sides of first wire Wa and second wire Wb included in B to the left and right.
1 is fixedly arranged, and the extending tip ends of the wires Wa and Wb are bundled together to form a tracing stylus 2.

The measuring device main body 1 comprises the substrate 11 and a box-shaped casing 12 attached to the upper portion thereof.
A storage hole 14 for storing the tracing stylus 2 is provided in the center of the front overhanging portion 13 of No. 1, and the upper part of the casing 12 is
A handle 15 for carrying is provided. Inside the measuring device body 1, a measuring element 2 is provided based on the outputs of the encoders A and B.
An arithmetic unit 3 for calculating the position of is provided. Measuring instrument body 1
In the front surface portion of the casing 12 in, each wire Wa,
A slit 16 for pulling out Wb is opened, and a power switch 17, a receiving unit 60 of the remote controller 6, and a display 4 for displaying a calculation result of the calculator 3 are provided. The display unit 4 includes an X-axis coordinate display unit 41, a Y-axis coordinate display unit 42,
Pitch display section 43, green LE for pass / fail judgment based on tolerance
A pass indicator light 44 made of D or the like and a fail indicator light made of a red LED or the like are provided.

The tracing stylus 2 includes ring bodies 21 and 2 each formed of a bearing attached to the tip of each wire Wa, Wb.
A pin-shaped attachment 22 is inserted into the pin 1, and in the case of scribing, a scribing means 7 such as a punch or a writing instrument is attached to the attachment 22.

The first and second wires Wa and Wb are extended through rotating bodies 5 and 5 which rotate around axes H and N perpendicular to the two-dimensional plane XY. The winding drums D and D of the wires Wa and Wb may be used as they are for the rotating bodies 5 and 5, but in the case of FIG. 1, the rollers Ra and Rb are provided separately from the winding drums D and D. I am using.
Further, the wires Wa,
V-shaped groove 50 that aligns the height of the stretched portion of Wb
Is provided.

As shown in FIG. 2, the computing unit 3 is constructed by using a microcomputer CPU having a memory M, and is based on the values a and b of the encoders A and B fetched from the input unit IF. The basic calculation unit 30 is provided which is configured by the following first to fourth calculation means 31, 32, 33, 34 for performing coordinate calculation of the probe 2.

The first calculation means 31, as shown in FIG.
Pitch p between the wire winding start points F and G on the rotating bodies 5 and 5.
Is the base and the values a and b of the first and second encoders A and B are
In the triangle ΔJHN having the remaining two sides, an angle obtained by adding π / 2 radian to the angle θ formed by one side JH, which is equal to the value a of the first encoder A, with respect to the base HN is the rotating wire of the first wire Wa. This angle is obtained on the assumption that the line segment QH connecting the point Q separated from 5 and the center H of the rotating body 5 is the initial value of the plane angle K1 formed with respect to the base HN. Specifically, the calculation is performed according to the flowchart shown in FIG. First, in step 101, a quadrant CW that performs calculation
Is set to "0" indicating the second quadrant when the center point between the rollers 5 and 5 is the origin 0, 0, and in step 102, the values a and b of the encoders A and B are compared, If a is larger than b, the quadrant CW is set to "1" indicating the first quadrant in step 103, and the values of a and b are exchanged in step 104. Next, in step 105, the number of operations i is set to “0” indicating the first time, and in step 106, b is stored in t,
In step 107, when b-a is equal to or larger than a predetermined value, that is, when the pitch p is 600 mm, it is 163 mm or more. Is subtracted by 63 mm and the value of k1 = θ + π / 2 is calculated in step 109. Subsequently, in step 110, the magnification m used in the subsequent calculation is set to "1", and if K1 is 2.3 radians or less in the determination in step 111, step 112 subtracts 0.5 radian from k1 and step 113 And the magnification is m
Is corrected to 1.3. Subsequently, if K1 is π / 2 or less in the determination in step 114, step 1
In step 15, 0.1 radian is added to π / 2 to make this K1, and if K1 is larger than 3π / 2 in the determination in step 116, in step 117 subtract 0.1 radian from 3π / 2, A correction of K1 is to be performed.

The second calculating means 32 is on the tangent line of the rotating body 5 passing through the virtual separating points x1 and y1 from the virtual separating point Q of the first wire Wa with respect to the rotating body 5, which is determined by the plane angle K1, that is, the coordinates x1 and y1. In addition, the point separated by the first straight line length L1 obtained by subtracting the arc portion c1 wound around the rotating body 5 from the value a of the first encoder A is the virtual coordinate x2 of the probe 2.
This coordinate is obtained assuming y2. Specifically, the calculation is performed by each equation shown in steps 118 to 126.

The third computing means 33 subtracts the back-calculated value L5 + c2 of the second encoder B, which is back-calculated based on the virtual coordinates x2, y2, from the value b of the second encoder B, and the difference sub [0] = b- ( L5 + c2) is calculated. Specifically, the calculation is performed by each expression shown in steps 127 to 133.

When the difference sub [0] is within the micro permissible range, the fourth computing means 34 sets the coordinates of the probe 2 to obtain the virtual coordinates x2 and y2, and the difference sub [0] deviates from the micro permissible range. If the difference sub [0] is the first straight line length L,
A value obtained by dividing by 1 is added to the current plane angle, and the added plane angle K1 is used to repeatedly perform the calculation of the second calculation means 32 and thereafter. Specifically, as shown in FIG.
If the difference sub [0] is not within the range of plus or minus 0.02 mm in the determination of step 134, step 13
5, i = 1, that is, the value of the magnification m is changed in step 136 at the time of the second calculation, but at the other first and third calculations, the angle addK [added to the plane angle K1 at step 137 is calculated. 0] is obtained, and this is added to K1 in step 138. Then, in step 139, i = 0, that is, in the case of the first calculation, in step 140, the difference sub
[0] and the plane angle addition value addK [0] are set to s
Store in ub [1] and addK [1], step 14
In step 1, the number of calculations i is advanced by "1", the process returns to step 114, and the calculation is repeated with the updated plane angle K1. If i is 5 or more in step 142, that is, if the calculation does not converge within the allowable range after 5 calculations, step 1
At 43, x2 and y2 are set to 0 and 0 to exit the loop. Normally, i = 1, that is, most of the calculations are within the allowable range by two calculations, and at most i = 3, that is, four calculations are within the allowable range. Finally, if the quadrant CW is "1" indicating the first quadrant in step 144, the code of x2 is replaced in step 145, and the process ends.

In this way, the coordinates x2 and y2 to be obtained are determined by the above calculation, and as shown in FIG. 2, the X-axis coordinate display section 41 and the Y axis are displayed via the output device OF and the driver 81.
This is displayed on the axis coordinate display section 42.

By the way, in the above configuration, as shown in FIG. 2, the computing unit 3 is provided with the origin setting mechanism 35 for arbitrarily setting and changing the coordinate origin based on the position information of the probe 2. This is because the origin mode is selected by the mode select switch 61 of the remote controller 6 shown in FIG.
The straight line connecting the points T1 and T2 is taken as the X axis, and then the probe 2
The origin 0,0 is the intersection with the straight line connecting the two vertical points T3, T4 touched with. Furthermore, by selecting the reset mode with the mode select switch 61, it is possible to set any one point touched by the probe 2 as the origin 0, 0 regardless of the origin setting in the origin mode.

Further, as shown in FIG.
Pitch calculating means 36 for calculating the pitch between two different points of the tracing stylus 2 is provided, and by selecting the pitch display mode with the mode select switch 61 as shown in FIG. The pitch P is displayed on the pitch display section 43.

Further, as shown in FIG. 7, the calculator 3 has a first straight line L connecting the two points T5 and T6 touched by the probe 2.
An angle calculation means 37 for calculating an angle Φ between 1 and a second straight line L2 that connects between two points T7 and T8 which intersects with this and which is also touched by the probe 2, is provided with the mode select switch 61. The angle Φ is displayed on the pitch display section 43 by selecting the angle display mode.

Further, as shown in FIG.
A shape information generating means 38 is provided for generating shape information of the object to be measured, that is, coordinate information of each point, angle information, and the like, based on position information Ta ... The activation is performed by selecting the shape mode with the mode select switch 61, and the sequentially generated information is transferred to the external XY plotter 91 or printer 92 via the communication means 83 such as the 232C system as shown in FIG. For example, the contour of the shape, the coordinates, the angle, etc. are output.

As shown in FIG. 9, the computing unit 3 also has a center computing unit 39 for computing the center coordinates of a circle inscribed with a triangle having three points TA, TB, and TC as vertices touched by the probe 2. By selecting the three-point mode with the mode select switch 61, the center coordinates thereof are displayed on the X-axis coordinate display section 41 and the Y-axis coordinate display section 42.

Further, the computing unit 3 is provided with an inspection means 40 for determining whether or not the position touched by the probe 2 is within the range of the tolerance input from the ten key 62 of the remote controller 6.
By selecting the inspection mode with the mode select switch 61 and turning on the pass indicator lamp 44 or the reject indicator lamp 45 via the driver 82, it is possible to perform the pass / fail inspection.

In the above, the measuring device main body 1 is separated from the measuring device main body 1, and the remote controller 6 for remotely controlling the computing unit 3 and the display unit 4 is provided. Of course, a numeric keypad 62 may be provided.

FIG. 10 shows a radial drilling machine RA,
This device is applied, and a drill is positioned at a predetermined position so that drilling can be easily performed.

By the way, in the above description, the measuring device main body 1 is provided with the computing unit 3 and the display unit 4. However, this is connected to an external personal computer via a 232C cable or the like, and the computing is performed on the personal computer. And may be displayed.

FIG. 11 is a diagram in which the present invention is applied for three-dimensional measurement, and three encoders A, which encode and output the stretched length of the wire W which is always biased to the winding side,
B and C are provided, and the encoders A, B, and C are arranged on the measuring instrument body 1 by displacing the extension start ends of the wires Wa, Wb, and Wc by the horizontal displacement amount DH and the vertical displacement amount DT. , The extension ends of the wires Wa, Wb, Wc are bundled together to form a tracing stylus 2. In this case, since the encoders A, B, and C need to be oriented in the pull-out directions of the wires Wa, Wb, and Wc, a pair of front-stage guide rollers 51 are provided for pulling out the encoders A, B, C, and each wire. And the rear-stage guide roller 52 are respectively connected to the movable substrates 10a, 10b, 10
c to support the movable substrates 10a, 10b, 10
c is rotatably supported by the measuring instrument body 1 about the support shaft of the rear guide roller 52. With this, the coordinates on an arbitrary three-dimensional object 1000 to be measured can be known, which is convenient for three-dimensional measurement.

12 and 13 are not of the take-up drum type, but each wire Wa, Wb is interposed between the fixed end 400 to the measuring device main body 1 and the rotating body 5 on the stretching start end side. Each of the encoders A and B is configured to be capable of being stretched and wound up via the movable pulleys 201 and 202 that move.
Is constituted by a linear scale SS for detecting the linear movement length of the movable pulleys 201, 202, and further, the movable pulleys 201, 202
The support body 200 is provided with a biasing means 300 for biasing the wires Wa and Wb toward the winding side.

The moving pulley comprises a first moving pulley 201 having a small diameter and a second moving pulley 202 having a large diameter, and each wire Wa, Wb is
The first and second movable pulleys and the constant diameter pulley 203 having a medium diameter disposed on the fixed end 400 side are reciprocated and reciprocated twice. Each of the wires Wa and Wb is configured to run in parallel in the middle of the round trip. In addition, S is each pulley 201,
02 and 203 are support shafts, and V is a bearing.

The supporting body 200 of the movable pulleys 201 and 202 is
The rails 403 and 404, which are a pair of round rods and the like, are installed between a pair of left and right fixed blocks 401 and 402 so that they can move freely.

The linear scale SS is composed of a scale head SH which is fixed to the support 200 and moves, and a scale SL which is fixed to the side of the measuring instrument body 1 and has a span of several tens of centimeters. I am using one.

The urging means 300 is provided with a weight 301 which is suspended in the vertical direction, and the suspending wire 302 thereof.
Has one end fixed to the support 2 and is routed through the lower roller 303 and the upper roller 305 of the pole 304.

In FIG. 12, 501 and 502 are relay rollers for the wire Wb.

12 and 13, when the tracing stylus 2 is pulled, the respective wires Wa, Wb are stretched, and the supporting bodies 200 of the movable pulleys 201, 202 are stretched by the respective wires Wa, Wb. Move linearly according to the size. In this case, each wire Wa, Wb has two moving pulleys 2
Since the wire 200 is drawn around two times through 01 and 202, the amount of movement of the support body 200 is 1/4 with respect to the actual stretched length of each wire Wa and Wb. And
The movement of the support body 200 is read by the encoders A and B composed of the respective linear scales SS, the respective values are multiplied by 4, and the coordinates of the tracing stylus 2 are obtained by the same calculation procedure as shown in FIGS. The coordinates are displayed.

In this case, each wire Wa, Wb is connected between the two movable pulleys 201, 202 and one fixed pulley 203,
Since the middle part does not slacken and is expanded and contracted in a linearly taut state, and the linear movement of each wire Wa, Wb is directly read by the linear scale SS, the measurement accuracy can be further improved. is there.

FIG. 14 shows an improved stylus 2, in which coupling pieces 210, 210 for coupling to the tips of the wires Wa, Wb are rotatably inserted into a pin body 220, and the pin body 220 is used as a base 230. And an arm 240 standing upright on it. Each of the coupling pieces 210, 2 is attached to the pin body 220.
Adjustment bodies 250 and 260 for adjusting the support height of 10 are provided so as to be movable in the vertical direction. In this way, by sliding the board 230 on the object to be measured, each wire W is moved.
That is, a and Wb can be easily stretched.

[0069]

As described above, according to the first aspect of the present invention, the position can be measured simply and with high accuracy simply by positioning the tracing stylus 2 at a point to be measured on the object to be measured. The range can cover the entire range in which the wire W can be stretched, and the wire W can be freely stretched within the measuring range. Therefore, there is no particular need to select the shape or size of the object to be measured. The wires W are constantly urged toward the winding side, and when the hands are released from the probe 2, each wire W contracts and the wires W and the probe 2 are stored in the measuring device body 1 side, which is convenient for carrying. Is.

According to the second aspect of the present invention, the wire W can be smoothly stretched by the rotary body 5 following the tracing stylus 2 positioned at arbitrary coordinates, and each encoder A,
The values a and b of B can be accurately obtained.

According to the third aspect of the present invention, the winding drum D for winding the wires Wa and Wb around the encoders A and B,
In the device including D, the same effect as that of the invention of claim 2 can be obtained by the separate rollers Ra and Rb.

According to the fourth aspect of the present invention, the V-shaped groove portion 50 aligns the heights of the stretched portions of the wires Wa and Wb, so that the values a and b of the encoders A and B can be obtained more accurately. be able to.

According to the fifth aspect of the invention, the position of the probe 2 can be concretely calculated by the first to fourth calculating means 31, 32, 33, 34.

According to the sixth aspect of the invention, the origin setting mechanism 35 can arbitrarily set the reference of the coordinates to be obtained.

According to the seventh aspect of the invention, the pitch calculation means 36 can grasp the pitch between two different points of the probe 2.

According to the invention described in claim 8, the angle between the two arbitrary straight lines can be grasped by the angle calculating means 37.

According to the ninth aspect of the invention, the shape information generating means 38 can grasp the contour of an arbitrary shape.

According to the tenth aspect of the invention, the center calculation means 39 can grasp the center coordinates of an arbitrary hole.

According to the eleventh aspect of the invention, the inspection means 40 can easily perform the quality inspection of the product.

According to the twelfth aspect of the invention, the remote control 6 can further reduce the measurement work.

According to the invention of claim 13, the probe 2
By attaching the scribing means 7, scribing work can be performed easily and satisfactorily.

According to the fourteenth aspect of the invention, the wire W
It is possible to satisfactorily prevent the slack on the take-up side and further improve the measurement accuracy.

According to the invention of claim 15, claim 1
In the invention described in 4, it is possible to secure a sufficient length for stretching the wire W from the measuring device main body 1, and it is possible to secure a wide measuring range even if the measuring device main body 1 is small.

According to the invention of claim 16, claim 1
In the invention according to claim 4 or claim 15, the movable pulley 201,
Regardless of the moving position of 202, the moving pulleys 201, 202 are always moved.
A constant urging force can be applied to the wire W, and the wire W can be smoothly stretched.

According to the seventeenth aspect of the invention, the same effect as that of the first aspect of the invention can be expected by combining with another system such as a personal computer.

[Brief description of drawings]

FIG. 1 is a perspective view of a wire-type multidimensional measuring apparatus according to the present invention.

FIG. 2 is a block diagram of the control circuit.

FIG. 3 is an explanatory diagram of the same coordinate calculation.

FIG. 4 is a diagram showing a first half portion of the control flowchart.

FIG. 5 is a diagram showing the latter half of the control flowchart.

FIG. 6 is an explanatory diagram of the same origin set.

FIG. 7 is an explanatory diagram of the same angle calculation.

FIG. 8 is an explanatory diagram of the same shape mode.

FIG. 9 is an explanatory diagram of the center measurement.

FIG. 10 is an explanatory view showing an application example to the radial drilling machine.

FIG. 11 is a perspective view of another embodiment showing the same three-dimensional type.

FIG. 12 is a plan view showing a modified example of the drawn and wound-up portion of the wire.

13 is a side view of the one shown in FIG.

FIG. 14 is a perspective view showing an improved example of the same tracing stylus portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Measuring device main body, 2; Measuring element, 3; Computing device, 4; Display device, 5; Rotating body, 6; Remote controller, 7;
B, C; encoder, W; wire, 200; support, 2
01, 202; movable pulley, 300; biasing means, 301;
Weight, SS; Linear scale

Claims (17)

[Claims] 1. A plurality of encoders (A, B ..) for encoding and outputting the stretched length of a wire (W) which is always biased to the winding side, and these encoders (A, B ..)
Are arranged in the measuring instrument body (1) by mutually displacing the stretching start ends of the respective wires (W), and the stretching tip ends of the respective wires (W) are bundled together to form a tracing stylus (2).
On the other hand, a computing unit (3) for computing the position of the probe (2) based on the output of each encoder (A, B ...) And a display unit (4) for displaying the computation result are provided. Wire-type multidimensional measuring device characterized by. 2. A two-dimensional plane (XY) for measuring the first and second wires (Wa, Wb) provided in the first and second encoders (A, B), respectively, which has two encoders.
The wire-type multidimensional measuring apparatus according to claim 1, wherein the wire-type multidimensional measuring apparatus is stretched through rotating bodies (5, 5) that rotate around an axis perpendicular to the axis. 3. An encoder (A, B) is provided for each wire (W).
A winding drum (D, D) for winding a, Wb), and the rotating body (5, 5) is a roller (Ra, Rb) provided separately from the winding drum (D, D). 2. The wire-type multidimensional measuring device according to 2. 4. The V for aligning the height of the stretched portion of each wire (Wa, Wb) with the outer peripheral portion of each roller (Ra, Rb).
The wire type multidimensional measuring apparatus according to claim 3, wherein the groove section (50) is provided. 5. An arithmetic unit (3) is provided with the following means (31, 3).
2, 33, 34), The wire-type multidimensional measuring device according to claim 2 or claim 3 or claim 4. I. In the triangle having the pitch (p) of the rotating body (5, 5) as the base and the values (a, b) of the first and second encoders (A, B) as the remaining two sides, the first encoder (A) Is equal to the value (a) of π / 2.
The angle added with radians is the initial value of the plane angle (K1) formed by the line segment connecting the point where the first wire (Wa) separates from the rotating body (5) and the center of the rotating body (5) with respect to the base. , The first calculation means (31) for obtaining this angle b. From the virtual separation point (x1, y1) of the first wire (Wa) to the rotating body (5) determined by the plane angle (K1) to the tangent line of the rotating body (5) passing through the virtual separation point (x1, y1). , The rotary encoder (5) from the value (a) of the first encoder (A)
It is assumed that a point separated by the first straight line length (L1) obtained by subtracting the circular arc portion (c1) wound around is the virtual coordinate (x2, y2) of the tracing stylus (2). Computing means (32) c. The difference (su) obtained by subtracting the back-calculated value (L5 + c2) of the second encoder (B) back-calculated based on the virtual coordinates (x2, y2) from the value (b) of the second encoder (B).
b = b-L5-c2) third calculating means (33) d. When the difference (sub) is within the minute allowable range, the virtual coordinates (x2, y2) are set as the coordinates of the probe (2) to be obtained,
When the difference (sub) deviates from the minute allowable range, a value obtained by dividing the difference (sub) by the first straight line length (L1) is added to the current plane angle, and the added plane angle (K1) is used to determine the second value. Fourth arithmetic means (34) for repeatedly performing arithmetic operations after the arithmetic means (32) 6. The origin setting mechanism (35) for providing an arithmetic unit (3) with an origin setting mechanism (35) for arbitrarily setting and changing the coordinate origin based on the position information of the probe (2). The wire-type multidimensional measuring device according to one aspect. 7. The wire according to claim 1, wherein the calculator (3) is provided with a pitch calculator (36) for calculating a pitch between two different points of the probe (2). Multi-dimensional measuring device. 8. A first straight line connecting two points touched by the probe (2) to the computing unit (3) and a second straight line intersecting this line and connecting two points similarly touched by the probe (2). The wire-type multidimensional measuring apparatus according to claim 1, further comprising an angle calculating means (37) for calculating an angle between the straight line and the straight line. 9. The arithmetic unit (3) is provided with shape information generating means (38) for generating shape information of the object to be measured based on position information of a plurality of touches made by the probe (2). 9. The wire-type multidimensional measuring device according to claim 8. 10. The computing unit (3) is provided with a center computing unit (39) for computing the center coordinates of a circle inscribed with a triangle having three points touched by the tracing stylus (2) as vertices. 10. The wire-type multidimensional measuring device according to claim 9. 11. The arithmetic unit (3) is provided with an inspection means (40) for judging whether or not the position touched by the tracing stylus (2) is within the range of input tolerance. Any one wire type | mold multidimensional measuring apparatus of any one statement. 12. A remote controller (6) which is separated from the measuring device body (1) and remotely controls the computing device (3) and the display device (4).
The wire-type multidimensional measuring apparatus according to claim 1, further comprising: 13. The wire-type multidimensional measuring apparatus according to claim 1, wherein a scribing means (7) is detachably attached to the tracing stylus (2). 14. Each wire (W) can be stretched and wound up via a movable pulley (201, 202) interposed between a fixed end of the measuring instrument body (1) and a stretching start end. And each encoder (A, B) is composed of a linear scale (SS) for detecting the linear movement length of the moving pulley (201, 202), while the moving pulley (201, 202) support (20)
The wire type multidimensional measuring apparatus according to claim 1 or 2, wherein a biasing means (300) for biasing each wire (W) toward the winding side is attached to 0). 15. A constant pulley (20) having a plurality of moving pulleys (201, 202) and arranged on the fixed end side of a wire (W).
15. The wire-type multidimensional measuring apparatus according to claim 14, wherein the wire (W) is reciprocated a plurality of times between it and 3). 16. The biasing means (300) comprises a vertically suspended weight (301).
The wire-type multidimensional measuring device described. 17. A plurality of encoders (A, B ...) For encoding and outputting a stretched length of a wire (W) which is always biased to the winding side, and each of these encoders (A, B ...) Is provided.
Are arranged in the measuring instrument body (1) by mutually displacing the stretching start ends of the respective wires (W), and the stretching tip ends of the respective wires (W) are bundled together to form a tracing stylus (2).
The wire-type multi-dimensional measuring device characterized in that