JPH0476796B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rail-type universal parallel ruler device for drawing parallel lines of inclined lines at a desired vertical pitch on a sheet of paper on a drawing board.

When drawing parallel lines at a desired vertical pitch using a universal parallel ruler device, if a display such as lighting a lamp is performed each time the scale moves by a predetermined vertical pitch, the parallel lines can be drawn efficiently. As this type of device, the one shown in Japanese Patent Publication No. 58-55916 is known. However, when the scale is parallel to the reference coordinate axis, this device can draw parallel lines with the desired vertical pitch by specifying a set value using a matching display such as a lamp, but when the scale is parallel to the reference coordinate axis, If it is tilted to a desired angle (see Figure 4), the vertical pitch α of the slope line and the pitch B in the coordinate axis direction will be different, so even if you specify a set value, this setting value will not change the pitch B in the coordinate axis direction. However, the vertical pitch α was not specified. For example, the setting value
If you specify 20mm, the scale will move in the direction of the Y coordinate axis.
A coincidence display is made every 20 mm of movement, but the vertical pitch of the parallel lines drawn based on this coincidence display, that is, the interval in the direction perpendicular to the parallel lines, is not 20 mm. Therefore, when drawing inclined lines at equal intervals, it is necessary to calculate in advance a setting value corresponding to the vertical pitch of the parallel line to be drawn, and then specify this calculated value, which is extremely inconvenient.

The present invention aims to eliminate the above-mentioned defects. The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a drawing board, on which an X rail 4 is fixed and an X cursor 6 is movably attached to the X rail 4. The movement of the X cursor 6 along the X rail 4 is controlled by a known X encoder 8 (second
(see figure) is configured to be converted into a pair of pulse signals having a phase difference of 90 degrees. 1
0 is a Y rail connected to the X cursor 6, the Y rail 10 is set perpendicular to the X rail 4, and the Y rail 10 is movable along the X rail 4 on the drawing board 2. is supported by
A Y cursor 12 is movably attached to the Y scale 10, and a head 14 is attached to this. Y rail 1 of the Y cursor 12
The movement along 0 is configured to be converted by a known Y encoder 16 into a pair of pulse signals having a phase difference of 90 degrees. Said head 1
4, a scale mounting plate 18 is rotatably mounted to the base plate of the head 14, and a horizontal scale 20 and a vertical scale 22 are removably fixed to the scale mounting plate 18. The rotary movement of the scale mounting plate 18 relative to the head 14 substrate is converted by a known encoder 24 into a pair of pulse signals having a phase difference of 90 degrees and having directionality. There is. The output end of the X encoder 8 is connected to an X counter 32 via a Schmitt circuit 26, a direction determining circuit 28, and a polarity inverting circuit 30, as shown in FIG. Reference numeral 34 denotes a zero detection section for detecting the count value zero of the X counter 32 and inverting the flip-flop circuit of the polarity inversion circuit 30. X
When the cursor 6 is moved to the right in FIG. 1 along the X rail 4, the X encoder 8 outputs a pair of pulses whose phase is shifted by 90 degrees. This pulse is waveform-shaped by the Schmitt circuit 26 and input to the direction determining circuit 28. The direction determining circuit 28 determines the direction of the pulses based on the phase difference between the output pulses of the encoder 8, and outputs the pulses to the up count line of the X counter 32 via the polarity determining circuit 30. The X counter 32 adds up the pulses, and this added value is digitally displayed on the X display section 38 by the driver 36. X cursor 6
1 along the X rail 4, the direction determining circuit 28 determines the direction of the pulses from the X encoder 8, and outputs the pulses to the down count line of the X counter 32. This causes the X counter 32 to subtract the pulse, and this subtracted value is digitally displayed on the X display section 38 by the driver 36. When the X cursor 6 moves to the left in FIG. 1 and the X counter 32 becomes zero, and the X cursor 6 continues to move to the left, the polarity inversion circuit 30 is inverted by the zero detection section 34. The X counter 32 of the output pulse of the direction discrimination circuit 28
The input route to is switched. That is, when the X cursor 6 is positioned to the left in FIG. 1 with the count value zero of the X counter 32 as a reference, when the X cursor 6 moves to the left, the X counter 32 adds the input pulse. However, when the X cursor 6 moves to the right, the X counter 32 subtracts the pulse. As a result, the absolute movement amount of the X cursor 6 with respect to the zero position on the X rail 4 is digitally displayed on the X display section 38. The zero position of the X cursor 6 can be set by pressing the X reset switch 40 and turning it on.
By resetting the counter 32, it can be set at any position on the X rail 4. Based on the same principle as described above, the absolute movement amount of the Y cursor 12 with respect to the zero position on the Y rail 10 is digitally displayed on the Y display section 42. Further, based on the same principle, the absolute rotation amount of the scale mounting plate 18 relative to the head 14 substrate is digitally displayed on the display unit 44. The XY display sections 38, 42, and 44 are placed on the head 14, the Y cursor 12, or other appropriate locations. The X encoder 8 is disposed at the end of the X rail 4, the Y encoder 16 is disposed at the end of the Y rail 10, and the encoder 24 is disposed inside the head 14. Various electronic circuits connected to the output sides of the encoders 8, 16, and 24 are integrated and mounted on a circuit mounting plate within a cover attached to the head 14. 46 is a latch circuit, and when the latch key 48 is pressed, the circuit 46 outputs the output count values X1, Y1 of the X counter 32, Y counter 50, and counter 52 connected to the latch circuit 46, and the α pitch designation key 54. The pitch value α set by is stored and held. Reference numeral 56 denotes a calculation circuit, which is configured to perform the calculation Y=(X-X1)tan+α/cos+Y1, and the output terminal of the calculation circuit 56 is connected to a comparison circuit via a changeover switch 100 provided in the head 14. It is connected to one input end of 58. 56a is a calculation circuit configured to perform the calculation: X=(Y-Y1)arctan(90 degrees-)-α/cos+X1.

The above X indicates the X coordinate value on the straight line 66a corresponding to the Y coordinate value of an arbitrary point on the straight line 64a shown in FIG. This straight line 66a faces the straight line 64a with a vertical pitch of α. The output terminal of the calculation circuit 56a is connected to one input terminal of the comparison circuit 58 via a changeover switch 100. An X counter 32 and a Y counter 50 are connected to the other input terminal of the comparison circuit 58 via a changeover switch 100. The comparator circuit 58 is configured to output a match signal when the values of data input to its two input terminals match. Reference numeral 60 denotes a display means consisting of a lamp attached to the head 14, and is configured to be turned on in response to a coincidence signal from the comparison circuit 58. The display means 60 operated by the coincidence signal output from the comparison circuit 58 may be a buzzer or any other device other than a lamp, as long as its output signal can be recognized visually or audibly.

Next, the operation of this embodiment will be explained.

First, scale 20 is
The coordinates are set parallel to the reference line 61 (see FIG. 3), and the counter 52 is reset to zero in the parallel state. To set the scale 20 parallel to the X coordinate reference line 61, first fix the scale mounting plate 18 to the head 14 board side, and then
Fix the cursor 12 to the Y rail 10,
Mark a point on the paper on the drawing board 2 using one point on the scale 20 as a mark, then move the Y rail 10 by an arbitrary amount along the X rail 4, and then move the scale 20
Mark a dot on the paper using the above point as a mark. After that, connect the two points on the paper with a straight line. Next, by releasing the fixation of the scale mounting plate 18 and aligning the scale 20 with the above straight line, the scale 20 becomes parallel to the X coordinate reference line 61. In this state, the reset switch 62 is pressed to reset the counter 52 to zero. After completing the scale angle zero setting work described above, if you want to draw a number of parallel lines on the paper with inclined straight lines forming a desired angle of inclination with respect to the X coordinate reference line 61 and a desired vertical pitch α, first, Specify the pitch value α using the α pitch specification key 54, set the angle of the scale 20 to a desired value, and fix the scale mounting plate 18 to the board side of the head 14 to prevent the scale mounting plate 18 from being accidentally attached. Keep it from rotating. Next, operate the changeover switch 100 to change the movable piece to contacts C2 and C4.
Turn it to the side. In this state, move the head 14 to move the scale 20 to a desired position on the paper, press the latch key 48 to insert it, and draw the first straight line 64 along the scale 20 with a writing instrument ( (See Figure 3). Latch key 4
When 8 is thrown, the counters 32, 50,
52 count values X1, Y1, and designated key 5
The output pitch value α of 4 is latched in the latch circuit 46. The above X1 stored in the latch circuit 46,
Y1, is input to calculation circuits 56 and 56a.
Next, for example, the head 14 is moved upward in FIG. By moving the head 14, the calculation circuit 56 is
, the count value X of the X counter 32 is input. The calculation circuit 56 receives the input signals X1, Y1,
Based on and X, calculate Y=(X-X1)tan+α/cos+Y1... The above equation (1) is an equation that indicates the Y coordinate value of a point of a straight line 66 having a vertical pitch of α with respect to the straight line 64, which corresponds to an arbitrary X coordinate point of the straight line 64. That is, in Figure 4, Y = A + B + Y1 and A/X - When substituted into
Equation (1) is obtained. The value of Y is input to the comparison circuit 58, and the value y of the Y counter 50 is input to the comparison circuit 58. When the head 14 moves upward in FIG. 3 and Y=y, the comparison circuit 58 outputs a coincidence signal and the display means 60 lights up. The operator stops moving the head 14 when the display means 60 is lit, and draws a line along the scale 20 while the display means 60 is lit. A straight line 66 with a vertical pitch can be drawn. Next, press the latch key 48 to set the new XY to the latch circuit 46.
After inputting the data, move the head 14 upward in FIG. 3 to draw a straight line having a vertical pitch of α with respect to the straight line 66. In this way, parallel lines of vertical pitch α are sequentially drawn based on the display on display means 60. In addition, in the above embodiment, the straight line 66
When the above Y value matches the count value y of the Y counter 50, the comparison circuit 58 outputs a match signal. The output terminal of the X counter 32 may be connected to one input terminal of the X counter 32, and the value of X on the straight line 66 may be calculated in the calculation circuit 56. In this case, the value of X can be found as follows: X=Y-Y1/tan-α/sis+X1.

In the above embodiment, if a parallel line of vertical pitch α is drawn with the X cursor 6 fixed to the X rail 4, (X-X1) in the above equation (1)
Since tan is zero, the calculation circuit 56 needs to calculate only Y=α/cos+Y1, and with the Y cursor 12 fixed to the Y rail 10, the parallel line of vertical pitch α is used as the X coordinate reference. line 61
If you draw along the above calculation circuit 56
When calculating the above X, it is sufficient to calculate only X=α/sin+X1. In addition, in the above embodiment, the encoders 8, 16, 2
4 may use an incremental type output encoder.

The above is a case where parallel lines are drawn using the horizontal scale 20, but if the changeover switch 100 is operated and the movable pieces are brought down to the contact points C1 and C3, the vertical scale 22 can be used to draw parallel lines at the desired vertical pitch α. Can draw parallel lines.

This operation will be explained below.

First, the pitch value α is specified using the α pitch specification key 54, and the angle of the vertical scale 22 is set to a desired value. The drawing edge of the vertical scale 22 in this state is shown by a straight line 64a in FIG. Straight line 6 at this time
When the angle of 4a with respect to the X coordinate axis is , the count value of the counter 52 is (90 degrees -).
This is because the vertical scale 22 has an angular difference of 90 degrees with respect to the horizontal scale 20, and the counter 52 measures the angle with the horizontal scale 20 as a reference. Of course, the counter 52
The counting standard may be adjusted to the vertical scale 22.

Next, press the latch key 48 to insert it, and draw the first straight line 64a along the vertical scale 22 with a writing instrument. When the latch key 48 is turned on, the count values X1, Y1 of the counters 32, 50, 52 and the set pitch value are latched in the latch circuit 46. Next, the head 14 is moved on FIG. 4, for example, to the left. Head 14
Due to the movement of the Y counter 50 in the calculation circuit 56a,
The count value Y is input. The calculation circuit 56a calculates X= based on the input signals X1, Y1, and Y.
(Y-Y1)tan (90 degrees -)-α/cos+X1...(2) Calculate. The above equation (2) is an equation indicating the X coordinate value of a point on the straight line 66a having a vertical pitch of α with respect to the straight line 64, which corresponds to an arbitrary point on the straight line 64a. That is, in FIG. 4, X=A−B+X1
And, Y-Y1/A=tan (90 degrees-) Therefore, A=(Y-Y1) tan (90 degrees-) Also, since α/B=sin (90 degrees-α), B=α/sin (90 degrees - α) = α/cos By substituting the above A and B into the above X = A - B + X1, the above formula (2) is obtained.

The value of X is input to the comparison circuit 58, and the value x of the X counter 50 is input to the comparison circuit 58. When the head 14 moves to the left in FIG. 4 and X=x, the comparison circuit 58 outputs a coincidence signal. In addition, X encoder 8, Y encoder 1
As the encoder 6 and the encoder 24, commercially available absolute encoders can be used.

Incidentally, as is clear from the above description, the X encoder 8, the Schmitt circuit 26, the direction discrimination circuit 28,
The polarity inversion circuit 30, the zero detection section 34, the X reset switch 40, and the
4. Zero detector 86, Y reset switch 88 and Y counter 50 constitute Y movement data generating means, encoder 24, Schmitt circuit 90, direction discrimination circuit 92, polarity inversion circuit 94, zero detector 96, reset switch 62 and counter 5
2 constitutes an angle data generating means. The latch circuit 46 and latch key 48 constitute a reference position data setting means for holding position data based on a desired position of one of the scales. Also, α pitch specification key 5
4 constitutes vertical pitch setting means. Also,
The calculation circuit 56 and the comparison circuit 58 calculate position data in one coordinate axis direction that is vertically spaced apart by a vertical pitch value with respect to one scale 20 of the reference position,
A first unit that calculates the position data and the position data of the one scale 20 in the direction of one coordinate axis, and outputs a coincidence signal when the position data and the current position data of the one scale 20 in the direction of the one coordinate axis match. constitutes a means of

The calculation circuit 56a and the comparison circuit 58 calculate position data in one coordinate axis direction that is vertically spaced apart by a vertical pitch value with respect to the other scale 22 located at a position corresponding to the reference position, and compare the position data with the other scale 22. This constitutes second means for outputting a coincidence signal when the current position data of the scale 22 in one coordinate axis direction coincides with each other.

Next, with reference to FIG. 5, an embodiment in which pitch signals are output continuously will be described.

46 is a latch circuit, and when the latch key 48 is pressed, the circuit 46 outputs the output count values X1, Y1 of the X counter, Y counter, and counter connected to the latch circuit 46, and the α pitch designation key 54. The set pitch value α is stored and held. 120, 122, 124, 126, 130
132 is an arithmetic circuit, and 132 is an arithmetic circuit that performs division D/B of data D and B input to its two input terminals.
It performs B, and calculates the quotient and remainder of integers.

A detection circuit 134 detects zero in the remainder output of the arithmetic circuit 132, and is configured to output a signal of "1" when the remainder of the D/B is zero. Reference numeral 60 denotes a display means consisting of a lamp attached to the head 14, and is configured to be turned on by the output signal of the detection circuit 134.
Reference numeral 136 denotes an interlocking manual operation changeover switch provided in the head section. Note that the display means 60 operated by the output of the detection circuit 134 may be a buzzer or any other device other than a lamp as long as its output signal can be recognized visually or audibly. The other configurations are the same as those of the above embodiment. In the above configuration, after completing the scale angle zero setting work, if you want to draw many parallel lines on the paper with inclined straight lines forming a desired angle of inclination with respect to the X coordinate reference line 62 and with a desired vertical pitch α. First, specify the pitch value α using the α pitch specification key 54, set the angle of the scale 20 to a desired value, and fix the scale mounting plate 18 to the board side of the head 14. Be careful not to rotate it carelessly. In this state, the movable piece of the switch 136 is brought into contact with the contact C1. Next, move the head 14 to move the scale 20 to the desired line drawing start position on the paper, press the latch key 48 to insert it, and draw the first straight line 64 along the scale 20 with a writing instrument. . When the latch key 48 is turned on, the count values X1, Y1 of the counter and the output pitch value α of the designated key 54 are latched in the latch circuit 46.
The position of the scale 20 at this time becomes the reference position. The above X1 stored in the latch circuit 46,
Y1, is input to the arithmetic circuit 120. next,
For example, the head 14 is moved upward in FIG. As the head 14 moves, the count value X of the X counter is input to the arithmetic circuit 124.
The arithmetic circuit 120 calculates C=(X-X1) tan+Y1 (2') based on the input signals X1, Y1, and X. C in the above equation (2') is the Y coordinate value of an arbitrary point on the straight line 64. That is, in Figure 3, C=A+Y1 and A/X-X1=tan Therefore, A=(X-X1)tan Substituting the above A into the above C=A+Y1, we get (2')
The formula is obtained.

The value of C is input to the arithmetic circuit 124, and the value Y of the Y counter is also input to the arithmetic circuit 124, and the arithmetic circuit 124 calculates D=Y-C. D indicates the amount of movement of the scale 20 in the direction of the Y coordinate axis 68 with respect to its reference position. on the other hand,
The calculation circuit 122 calculates B=α/cos. This B is a pitch value in the Y coordinate direction corresponding to the vertical pitch α value. The data B and D are input to an arithmetic circuit 132, where a division of D/B is performed, and the arithmetic circuit 132 calculates an integer quotient and a remainder. If the remainder is zero, that is, when the scale 20 moves in the perpendicular direction by an integral multiple of α (in the Y coordinate axis direction by an integral multiple of B),
The remainder "0" detection circuit 134 outputs a signal of "1", and the display means 60 lights up. The operator stops moving the head 14 when the display means 60 first lights up, and while the display means 60 is lit,
If a line is drawn along the scale 20, a straight line 66 having a vertical pitch of α in a direction perpendicular to the straight line 64 is drawn.
can be drawn. Next, the head 14 is moved upward in FIG. 3, and while looking at the next display on the display means 60, a straight line having a vertical pitch of α with respect to the straight line 66 is drawn. In this way, parallel lines of vertical pitch α are sequentially drawn based on the display on display means 60.

Note that the above is a case in which parallel lines are drawn based on the amount of movement of the head 14 in the Y-coordinate reference line direction.
The amount of movement of the head 14 in the direction of the X coordinate reference line can also be used as a reference. When it is desired to draw a parallel line using the vertical scale 22, the changeover switch 136 is used to bring the movable piece into contact with the contact point C2.

Next, move the head 14 to the vertical scale 22.
to the desired line drawing start position on the paper, press the latch key 48 to insert it, and use a writing instrument to draw the first straight line 6 along the vertical scale 22.
Subtract 4a.

Next, for example, the head 14 is moved to the left in FIG. By moving the head 14, the arithmetic circuit 12
The count value of the Y counter 50 is input to 6. The arithmetic circuit 126 receives the input signals X1, Y1,
Based on
...(1') is calculated. The arithmetic circuit 130 calculates D=X−C based on the value of C and the value X of the X counter.
Calculate.

On the other hand, the arithmetic circuit 122 B = α/sin (90 degrees -) = α/cos Calculate.

The value of B and the value of D are divided by D/B in the arithmetic circuit 132.

In Figure 4, Y-Y1/A=tan (90 degrees-) therefore A=Y-Y1/tan (90 degrees-) = (Y-Y1) tan (90 degrees -) From this, the above equation (1') can be obtained.

Also, α/B=sin (90 degrees-)=cos therefore B=α/cos is obtained.

Also, X = A + X1 - B = (Y - Y1) tan (90 degrees -) - α / cos + X1 If the above value of C is subtracted from this value of X, head 1
The amount of movement D in the X coordinate axis direction from the reference position of No. 4 is obtained. This movement amount D has a negative value. Next, the arithmetic circuit 132 performs division by D/B, and if the remainder is zero, that is, the vertical scale 22 is moved in the direction perpendicular to the reference position of the vertical scale 22 indicated by the straight line 64a. When the value (an integral multiple of B in the direction of the X coordinate axis) is moved, the remainder “0” detection circuit 1
34 outputs a signal of "1".

Incidentally, in the above, the pitch signal is obtained based on the amount of movement of the head in the Y coordinate direction, but of course the pitch signal is
The pitch signal may be obtained based on the amount of movement in the direction of the coordinate axes.

Since the present invention is configured as described above, once a desired pitch position is specified, even if the scale is tilted with respect to the reference coordinate axis, the amount of movement of the scale in the perpendicular direction to the reference position matches the set pitch value. Since the display is performed by the display device, parallel lines of a desired vertical pitch can be drawn efficiently, and either the horizontal scale or the vertical scale can be arbitrarily selected and used.

[Brief explanation of drawings]

The figures show preferred embodiments of the present invention; FIG. 1 is a plan view, FIG. 2 is a block circuit diagram, FIG. 3 is an explanatory diagram, FIG. 4 is an explanatory diagram, and FIG. 5 is a diagram showing another embodiment. FIG. 2...Drawing board, 4...X rail, 6...X cursor, 8...Encoder, 10...Y rail, 12
... Y cursor, 14 ... Head, 16 ... Y encoder, 18 ... Scale mounting plate, 20, 22
...Scale, 24...Encoder, 26...
Schmitt circuit, 28... Direction discrimination circuit, 30...
...Polarity inversion circuit, 32...X counter, 34...
Zero detection section, 36...driver, 38...X display section, 40...X reset switch, 42...Y
Display section, 44...Display section, 46...Latch circuit, 48...Latch key, 50...Y counter,
52...Counter, 54...α pitch specification key, 56, 68, 70, 72... Arithmetic circuit, 60
... Display means, 62 ... Reset switch, 6
4...straight line, 66...straight line.

Claims (1)

[Claims] 1 A pair of scales at right angles to each other 2
A head 14 is provided with a scale mounting plate 18 to which scales 0 and 22 are attached, and is movably supported on the X and Y rails 4 and 10, and an X movement data generating means for outputting position data of the head 14 in the direction of the X coordinate axis. and,
In an apparatus comprising Y movement data generating means for outputting position data of the head 14 in the Y coordinate axis direction, and angle data generating means for outputting a rotation angle amount with reference to zero degree of the scale mounting plate 18, The scale 2 is based on the data of each means.
a reference position data setting means for holding position data based on a desired position of one of the scales 20 of 0 and 22; a vertical pitch setting means for setting the vertical pitch of parallel lines; Based on this, one scale 2 at the reference position
Calculates position data in one coordinate axis direction that is vertically away from zero by the vertical pitch value, and outputs a match signal when the position data matches the current position data in one coordinate axis direction of the one scale 20. a first means for calculating position data in one coordinate axis direction that is vertically spaced apart by the vertical pitch value with respect to the other scale 22 located at a position corresponding to the reference position; a second means for outputting a coincidence signal when the current position data of the scale 22 in one coordinate axis direction matches;
It comprises a switching means for selecting one of the first means and the second means, and a display means driven by the output of the selected one of the first and second means. A rail type flexible parallel ruler device.