JPH0476798B2 - - 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 at a desired angle (see Figure 3), the vertical pitch α of the slope line and the pitch B in the coordinate axis direction are different, so even if you specify a pitch value, this pitch value will not match the pitch B in the coordinate axis direction. However, the vertical pitch α was not specified. For example, if the vertical pitch value is specified as 20 mm, a match will be displayed every time the scale moves 20 mm in the Y coordinate axis direction, but the vertical pitch of the parallel line drawn based on this match display will be Perpendicular spacing is 20
Not mm. Therefore, when drawing inclined lines at equal intervals, the pitch B in the coordinate axis direction corresponding to the vertical pitch of the parallel lines to be drawn must be calculated in advance and this calculated value must be specified, 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, to 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) into a pair of continuous pulse signals having a phase value of 90 degrees. 10 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 connected to the X rail 4.
It is supported on the drawing board 2 so as to be movable along the drawing board 2. 12 is a Y cursor movably attached to the Y rail 10, and a head 14 is attached to this. The movement of the Y cursor 12 along the Y rail 10 is controlled by a known Y encoder 16.
is configured to be converted into a pair of continuous pulse signals having a phase difference of 90 degrees. A scale mounting plate 18 is attached to the head 14.
The scale mounting plate 18 has scales 20 and 22 removably fixed to the scale mounting plate 18. The scale mounting plate 18
The rotary motion of the head 14 relative to the substrate is converted by a known encoder 24 into a pair of continuous pulse signals having a phase difference of 90 degrees and having directionality. As shown in FIG. 2, the output terminal of the X encoder 8 is connected to a Schmitt circuit 26, a direction discrimination circuit 28, and a polarity inversion circuit 30.
It is connected to the X counter 32 via. 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 cursor 6
1 along the X rail 4, the X encoder 8 outputs a pair of continuous pulses with a phase shift of 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. When the X cursor 6 is moved to the left along the X rail 4 in FIG. As a result, X counter 3
2 subtracts the pulse, and this subtraction value is the driver 3
6 is digitally displayed on the X display section 38. When the X cursor 6 moves to the left in FIG. 1 and the X counter 32 becomes zero, and if the X cursor 6 also moves to the left, the zero detector
As a result, the polarity inverting circuit 30 is inverted, and the input path of the output pulse of the direction determining circuit 28 to the X counter 32 is switched. That is, with the count value zero of the X counter 32 as a reference, the X cursor 6 is
When the X cursor 6 moves to the left in the state where it is located to the left in the figure, the X counter 32
adds input pulses, and when the X cursor 6 moves to the right, the X counter 32 subtracts the pulses. In the end, the X cursor 6 appears on the X display section 38.
The absolute amount of movement based on the zero position on the X-rail 4 will be digitally displayed. The zero position of the X cursor 6 is the X reset switch 40.
By pressing to turn it on and operating the X reset circuit 41, the X counter 32 can be reset to any position on the X rail 4. By the same principle as above, Y
The Y rail 10 of the Y cursor 12 is displayed on the display section 42.
The absolute amount of movement relative to the top zero position is digitally displayed. Also, based on the same principle, the head 14 of the scale mounting plate 18 is attached to the display section 44.
The absolute amount of rotation is digitally displayed relative to the zero degree position relative to the substrate. 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. Said X, Y, counter 3
2, 50, and 52 are connected through latches 70, 72, and 74 to an input/output interface 76 of the microcomputer. The input/output interface 76 of the microcomputer, the CPU 78,
The ROM 100, RAM 102, and decoder 104 are integrated on a circuit mounting plate inside a cover attached to the head 14. 48 is X1, Y1,
, is an α value reading instruction key, and when this key 48 is pressed, the
The counter 32, the Y counter 50, the output count values X1, Y1 of the counter 52, and the pitch value α set by the α value setting digital switch 54 are stored and held in the RAM 102. 60
is a display means consisting of a lamp attached to the head 14, and is configured to be turned on by an output signal from the microcomputer. In addition to the lamp, the display means 60 operated by the output of the microcomputer may be a buzzer or any other device whose output signal can be recognized visually and audibly. In the figure, 104 is a decoder, 70 is an all reset switch, and 72
is an all reset circuit; 41, 89, and 63 are reset circuits; and 40, 88, and 62 are reset switches. Furthermore, in this embodiment, the X encoder 8, the Y encoder 8,
Although commercially available incremental encoders are used for the encoder 16 and encoder 24, commercially available absolute encoders may be used.

As is clear from the above description, the X encoder 8, the Schmitt circuit 26, the direction determination circuit 28,
The polarity inversion circuit 30, the zero detection section 34, the X reset switch 40, the 84, zero detection section 86, Y reset switch 88, Y reset circuit 89 and Y
The counter 50 constitutes Y movement data generating means,
Encoder 24, Schmitt circuit 90, direction discrimination circuit 92, polarity inversion circuit 94, zero detection section 9
6, reset switch 62, reset circuit 6
3 and the counter 52 constitute angle data generating means. Further, the digital switch 54 constitutes means for instructing the vertical pitch.

Next, the operation of this embodiment will be explained.

First, scale 20 is
The counter 52 is set parallel to the coordinate reference line 62, and in the parallel state, the counter 52 is reset to zero. To set the scale 20 parallel to the Mark a dot on the paper on the drawing board 2 using the mark as a mark, then move the Y rail 10 by an arbitrary amount along the X rail 4, and then mark a dot on the paper using the above point on the scale 20 as a mark. attach After that, connect the two points on the paper with a straight line. Next, scale mounting plate 1
8 is released and the scale 20 is aligned with the above-mentioned 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, α
Specify the pitch value α with the value setting digital switch 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. In this state, move the head 14 to move the scale 20 to a desired position on the paper, press the reading instruction key 48 to input it, and use a writing instrument to read the scale 20.
Draw a first straight line 64 along. When the key 48 is turned on, the count values X1, Y1 of the counters 32, 50, 52 and the output pitch value α of the digital switch 54 are stored in the RAM 102 as the reference position data of the scale 20. Next, for example, the head 14 is moved upward in FIG. Due to the movement of the head 14, the count value X of the counter 32 is displayed on the input/output interface 76.
is input. The CPU 78 calculates Y=(X−X1) tan+nα/cos+Y1 (1) based on the reference position data of the RAM 102 and the calculation formula written in the ROM 100. The above n is an integer, n=1, n=
A predetermined number of Y values corresponding to each n of 2, n=3, n=4, . . . are calculated. The above formula (1) is
When n=1, this is the equation for the Y coordinate value of one point corresponding to an arbitrary point on the straight line 64 on the straight line 66 having a vertical pitch of α with respect to the straight line 64. That is, in Fig. 3, Y=A+B+Y1 and A/X-X1=tan Therefore, A=(X-X1)tan Also, α/B=cos Therefore, B=α/cos The above A and B are replaced by the above Y=A+B+Y1 When substituted into
Equation (1) is obtained.

When the latch value y of the counter 50 becomes Y=y due to the upward movement of the head 14 in FIG.
6 outputs a coincidence signal, and the display means 60 lights up. The operator sees the lighting of the display means 60 and selects the head 1.
4 is stopped and 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 can be drawn. Next, the head 14 is moved upward in FIG. straight line 66
When the scale 20 is located on a straight line having a vertical pitch of α to , the microcomputer outputs a coincidence signal. The operator draws the next parallel line based on the pitch display on the display means 60. 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 for head 14.
In this case, parallel lines are drawn based on the amount of movement of the head 14 in the direction of the Y coordinate reference line 65, but it is also possible to use the amount of movement of the head 14 in the direction of the X coordinate reference line 65 as a reference. In this case, the X coordinate value corresponding to an arbitrary point on the reference line 64 on each parallel line that is nα vertical pitches away from the reference line 64 can be found by X=Y−Y1/tan−nα/sin+X1. I can do it. Note that n is a value of 1, 2, 3, 4, 5, . . . , or an integer, and the value of X is calculated for each value of n.

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 the object described at the beginning can be achieved.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention, with FIG. 1 being a plan view, FIG. 2 being a block circuit diagram, and FIG. 3 being an explanatory diagram. 2...Drawing board, 4...X rail, 6...X cursor, 8
...X encoder, 10...Y rail, 12...Y cursor, 14...head, 16...Y encoder, 18
...Scale mounting plate, 20, 22...Scale, 24
...O encoder, 26... Schmitt circuit, 28...
Direction discrimination circuit, 30... Polarity inversion circuit, 32... X counter, 34... Zero detection unit, 36... Driver,
38...X display section, 40...X reset switch, 4
4...Display section, 48...X1, Y1, α value reading instruction key, 50...Y counter, 52...Counter, 54...α value setting digital switch, 60...
Display means, 62... Reset switch, 64... Straight line, 66... Straight line, 76... Input/output interface, 78... CPU, 100... ROM, 102...
RAM, 104...Decoder.

Claims (1)

[Claims] 1 X movement data generating means for outputting the movement amount of the Y rail 10 along the X rail 4; Y movement data generating means for outputting the movement amount of the head 14 along the Y rail 10; Head 14
An angle data generating means for outputting a rotation angle amount with reference to zero degree with respect to the substrate, means for indicating the vertical pitch of the parallel line;
Based on the X, Y movement and angle data, the position data of the desired position of the scale is set as reference position data, and the distance in the vertical direction from the scale of this reference position is an integral multiple of the vertical pitch value. a microcomputer that outputs a coincidence signal when the output position data of at least one of the XY movement data generating means matches, and a display means that is driven by the coincidence signal. Rail type flexible parallel ruler device.