JPS5855916B2 - drawing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a drawing machine in which a display means indicates that the operation state of a drawing head section which is arbitrarily moved and operated on a drawing board during drawing work is in a desired setting state. Regarding.

Generally, in a drawing machine equipped with a drawing head that can be moved arbitrarily on the drawing board, such as a flexible parallel ruler, the coordinate position of the drawing head on the drawing board and the angle that can be freely set by the drawing head are The actual angle, etc. of the scale held on the scale is measured by analog measuring means using a scale plate and vernier, or by digital counting means via analog-to-digital conversion means, and the measurement result, that is, the current value, is directly measured. A method of displaying the operation status of a drawing head is known.

By the way, if the operating status of the plotting head is displayed by directly displaying the current value in an analog or digital manner, it is difficult to display the coordinate position, rotation angle, etc. of the plotting head with high precision. Since the displayed value changes due to such displacement, the above-mentioned reading operation of the displayed value becomes difficult.

In addition, when analyzing a figure that has already been drawn, the display method of directly displaying the current value as described above is effective, but in normal drawing work, the drawing head is adjusted to the set value determined in advance. Since the operation involves moving or rotating, the conventional display method described above requires constant confirmation of the displayed value during the operation, resulting in extremely poor workability in drawing work.

Therefore, the present invention displays a match when the current value of the head unit matches a value that is an integral multiple of a predetermined set value when drawing equally spaced parallel lines (i.e., a predetermined set value of the head unit). A new drawing machine that achieves the purpose of clearly displaying the operating status of the head and increasing the efficiency of drawing work by displaying a matching display for each operating amount of movement of the head. This is what we provide.

That is, the gist of the present invention is to provide a head section that is operated to move in any direction on a drawing board, and a setting means that sets a horizontal direction setting value and a vertical direction setting value that indicate the desired movement operation position of this head section. and detecting means for detecting the current movement operation position of the head unit and outputting detection signals indicating the horizontal current value and the vertical current value, and detecting the current value indicated by the detection signal and the above. a comparison means that compares each setting value set by the setting means and outputs a coincidence detection signal every time the current value matches a value that is an integral multiple of the setting value; and a coincidence detection signal from the comparison means. The drawing machine is provided with a display means whose drive is controlled.

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail using drawings showing an embodiment in which the present invention is applied to a universal parallel ruler.

A schematic external plan view of an embodiment to which the present invention is applied is shown in FIG.
2, and an enlarged plan view of the vicinity of the head portion is shown in FIG.

Further, circuit block diagrams showing the electrical configuration of this embodiment are shown in FIGS. 3 to 5.

In this actual case, a horizontal rail 2 is fixed to the upper edge of a drawing board 1 fixed on a leg (not shown), and a vertical rail 3 is connected and supported so as to be movable laterally with respect to the horizontal rail 2. The present invention is applied to a track-type flexible parallel ruler in which a head portion 5 for holding 4A and 4B at arbitrary angles is movably provided along the vertical rail 3 (first embodiment). (see Figures and Figure 2).

That is, a horizontal carriage 6 that is guided along the guide rail surface by rollers (not shown) is disposed on the horizontal rail 2 so as to be able to move laterally, and the upper end of the vertical rail 3 is connected to the horizontal carriage 6. There is.

Also, on the vertical rail 3, a vertical carriage 7 is guided along the vertical kite rail surface by rollers (not shown).
are arranged to be vertically movable, and the head portion 5 is connected to the above-mentioned vertical carriage 7 via a connecting member 8.

The head section 5 has a horizontal scale 4 on its mounting board 9.
A and a vertical scale 4B are screwed together, and by rotating the handle 10, the scales 4A and 4B can be set and held at any desired angle.

In the track type flexible parallel ruler having such a structure, the substrate 11 protruding from the horizontal carriage 6 is
A first rotary disk 13 is rotatably supported by the upper support shaft 12 .

This first rotary disk 13 has its outer peripheral edge in contact with the above-mentioned horizontal rail 2, and when it is laterally moved integrally with the above-mentioned horizontal carriage 6, it rotates by an amount corresponding to the amount of movement. It is designed to rotate by holding it.

Similarly, a board 14 protruding from the vertical carriage 7 is also provided.
A second rotary disk 16 is rotatably supported by the upper support shaft 15 .

This 20th rotating disk 16 has its outer peripheral edge in contact with the above-mentioned vertical rail 3, and when it is vertically moved integrally with the above-mentioned vertical carriage 7, it rotates by an amount corresponding to the amount of movement. It is designed to rotate.

The first and 20th rotating plates 13 and 16 each have a large number of equally spaced pulse reading samples 13A and 16A disposed on their circumferences.

The head portion 5 also has a cord fixed to a rotation shaft (not shown) of the handle portion 100 so as to rotate integrally with each scale 4A, 4B which is rotated by the handle portion 10. A plate 17 is built-in.

In this embodiment, the code plate 17 has a 7-bit inverted binary code pattern 17A arranged corresponding to the rotation angle of each scale 4A, 4B, as shown in FIG.

Further, the mounting board 9 of the head section 5 has a handle section 1.
0 and each scale 4A, 4B, a keypad 118 equipped with a plurality of key switches 118 display changeover switch 19
, and a display window 20 are provided.

As shown in FIG. 2, the head portion 5 includes:
First to fourth numerical display sections 21, 22° 23.24, first to third coincidence display sections 25.degree. 26.27, and first to sixth direction display sections 28A, 28B, 29
A, 29B, 3OA, and 30B are arranged so as to be visible through the display window 20 described above.

Here, the first numerical display section 21 is for numerically displaying the lateral operation setting value of the head section 5, which is set by operating a key switch, as will be described later.

A first match display section 25 is disposed above the first numerical display section 21, and first and second direction display sections 28A are arranged on the right and left of the first match display section 25.
s 28B is arranged.

Further, the second numerical display section 22 is for numerically displaying the vertical operation setting value of the head section 5, and on the left side of this second numerical display section 22 there is a second coincidence display section 26. are arranged, and third and fourth direction display sections 29A and 29B are arranged above and below the second coincidence display section 26.

Further, the third numerical display section 23 is for numerically displaying the head unit 50 rotation operation setting value, and a third coincidence display section 27 is disposed on the left side of the third numerical display section 23,
Fifth and sixth direction display sections 30A and 30B are arranged above and below the third coincidence display section 27, respectively.

Note that the fourth numerical value display section 24 will be described in detail below.

That is, in this embodiment, FIG.
As shown in the circuit block diagram in the figure, it is equipped with an arithmetic circuit 60 into which data signals are inputted by key operations on key switches provided on the keyboard 18, and is capable of processing trigonometric functions and exponential functions required for drawing work. Various calculations such as
It is designed to be displayed on the numerical display section 24.

Numerical display elements formed from light emitting diodes, liquid crystals, etc. are used for each of the numerical display sections 21, 22, 23, and 24, and each of the minus number display sections 25, 26.

27 and direction display portions 28A, 288.29A.

Light emitting diodes, liquid crystals, etc. are used for 29B, 30A, and 30B.

The first numerical display section 21, the first coincidence display section 25, and the first and second direction display sections 28A and 28B are driven by a control circuit configured as shown in FIG. The horizontal operation state of the head section 5 is displayed by.

That is, in FIG. 3, reference numeral 31 reads the pulse reading sample 13A provided on the first rotating plate 13 using optical reading means, magnetic reading means, etc. This is a pulse generator that outputs a pulse signal for each unit rotation amount, that is, for each unit operation amount of the head portion 5 in the horizontal direction.

This pulse signal from the pulse generator 31 is supplied to a reversible counter 33 via an accuracy setting device 32 constituted by a preset counter.

The reversible counter 33 performs an addition count in response to a detection output signal from a direction detector 34 that detects the direction of rotation of the tenth rotating plate 13, corresponding to the horizontal movement direction of the head section 5. It is controlled to switch to operation or subtraction counting operation,
The pulse signals supplied via the precision setting device 32 described above are counted.

The reversible counter 33 is reset to zero by operating the origin correction key 18A provided on the keyboard 18, and the horizontal coordinate position of the head portion 5 is set with an arbitrary position on the drawing board 1 as the origin. It is now possible to output counting results that indicate .

Further, the accuracy setting device 32 described above may be configured, for example, on the keyboard 1.
By operating the precision setting key 18C, the setting value input to the arithmetic circuit 60 by operating the numerical value setting key 18B provided at 8 is preset in the preset counter, thereby converting the pulse signal from the pulse generator 31 into the above-mentioned value. Arbitrary precision settings are made by dividing and outputting the frequency using the set value.

The counting result obtained by the reversible counter 33 as described above indicates the amount of movement of the head portion 5 in the lateral direction from an arbitrary origin on the drawing board 1, that is, the lateral coordinate position.

The count output signal of the reversible counter 33 is then supplied to the first input terminal 35A of the data comparator 35.

The second input terminal 35B of the data comparator 35 has
As will be described next, a data signal indicating a lateral operation setting value of the head section 5 set by key operations on the keyboard 18 is inputted from the data input circuit 36.

That is, the data input circuit 36 described above is constituted by an arithmetic circuit having a first power/division function, and receives a setting value set by a setting value signal from the double scale setting memory 37 from the horizontal direction setting memory 38. A data signal obtained by multiplying or dividing the set value signal is output.

The above-mentioned horizontal direction setting memory 38 includes the keyboard 18
The horizontal setting value inputted to the arithmetic circuit 60 by the key operation of the numerical value setting key 18B is
It is memorized by key operation.

Similarly, the doubling scale setting value input to the arithmetic circuit 60 is stored in the doubling scale setting memory 37 by operating the doubling scale setting key 18E.

Here, the arithmetic output signal indicating the arithmetic result of the arithmetic circuit 60 and the signal indicative of the memory contents of the double scale setting memory 37 are selectively displayed on the fourth numerical display section 24 by the selection switch 19A. It is now being supplied.

The data comparator 35 compares the count output signal of the reversible counter 33 and the data signal of the data input circuit 36, and when the signals match, outputs the match detection signal. The signal is supplied from the first output terminal 35a to the first coincidence display section.

Further, the data comparator 35 transmits the first direction signal to the second output terminal 35 when the current value indicated by the count output signal is smaller than the set value indicated by the data signal.
b to the first direction indicating section 28A, and if the current value is larger than the above set value, a second direction indicating signal is supplied to the second direction indicating section 28 from the third output terminal 35c.
Supply to B.

Here, the coincidence detection signal for driving and controlling the first coincidence display section 25 described above is used when the current value and set value are indicated by digital signals by the counting output signal and the data signal as in this embodiment. , can be easily obtained using a coincidence detector that detects whether the logical values of each signal match.

In addition, when the current value and the set value are configured to be indicated by analog signals, the coincidence detection signal can be obtained using analog level comparison means such as an electromotive comparator.

In this embodiment, the data comparator 35 described above is, for example,
It is composed of a logic circuit as shown in FIG.

That is, in FIG. 4, numeral 39 is a divider which has a division function and outputs a quotient value and a remainder value of the division result, and this divider 39 receives the above data supplied via the second input terminal 35B. Using the set value set by the signal as a divisor, a division operation is performed on the current value given by the above count output signal supplied via the first input terminal 35A.

Further, 40 detects that the quotient value of the division result by the above-mentioned divider 39 is °1'' (t 1u detector).

Furthermore, 41 is a ``0'' detector that detects that the remainder value of the division result by the above-mentioned divider 39 is 0.0''.

The detection output signal obtained by the above-mentioned °'0" detector 41 is supplied to one input terminal of each of the first and second analogues 42, 43.

The other input terminal of the first AND gate 42 is
A detection output signal obtained from the above tt 1*y detector 40 is supplied.

The other input terminal of the second AND gate 43 receives a repeat command signal set to logic (t1?j) by key operation of the repeat operation key 18F provided on the keyboard 18. It is supplied via the input terminal 35C.

and the above first and second AND gates 42.4
3, each AND gate output signal obtained by
The signal is output as a coincidence detection signal from the first signal output terminal 35a via the gate 44.

Furthermore, the above coincidence detection signal is transmitted to the flip-flop 45.
is supplied as a trigger signal to the third and fourth ant games) 47. through an inverter 46.
48 input terminals.

The other input terminal of the third AND gate 47 is
A positive output signal from the flip-flop 45 mentioned above is provided.

Further, the negative output signal from the flip-flop 45 is supplied to the fourth AND gate 48 .

The AND gate output signal obtained through the third AND gate 47 is outputted from the second output terminal 35b as the first direction instruction signal.

Further, the AND gate output signal obtained through the fourth AND gate 48 is used as the first direction signal and the third
It is designed to be outputted from the output terminal 35c.

Data comparator 35 constituted by the logic circuit as described above
In , when the set value set by the above data signal and the current value given by the above count output signal completely match, the AND gate output signal from the first AND gate 42 becomes logic It11y, and , when the repeat command signal is at logic tt 1py, the AND gate output signal from the second AND gate 43 becomes logic "1" every time the above current value matches a value that is an integral multiple of the set value. becomes.

Therefore, if the repeat command signal is logic ttO@7, a coincidence detection signal is obtained at the first output terminal 35a when the current value and the set value match, and the repeat command signal is logic "'1". If so, a coincidence detection signal is obtained every time the current value matches a value that is an integral multiple of the set value.

Furthermore, the third and fourth anthology) 47.48 are
When the above coincidence detection signal is not at logic ``1'', that is, when the current value and the set value do not match, the gate is opened and the flip-flop 45 is at logic 1''. Since the operating state is inverted every time the coincidence detection signal is output, the second and third output terminals 35b
, 35c, each direction instruction signal corresponding to the operation direction for making the current value of the head section 5 match the above set value is obtained.

Here, the counting output signal of the reversible counter 33 and the signal indicating the storage contents of the horizontal direction setting memory 38 are supplied to the first numerical display section 21 via the selection switch 19B. The numerical display section 21 of No. 1 can also selectively display the current value of the operating state of the head section 5 in the lateral direction.

Next, the second numerical display section 22, the second coincidence display section 26, and the third and fourth direction display sections 29A.

29B displays the operating state of the head section 5 in the vertical direction on the drawing board 1 by being driven by a control circuit having a configuration similar to that shown in FIG. 3 above.

The control circuit for displaying the operation state of the head section 5 in the vertical direction reads the pulse sample 16A provided on the 20th rotating plate 16, and displays the operation state of the head section 5 in the vertical direction.
A pulse signal is output from the pulse generator for each unit operation amount in the vertical direction, and a set value in the vertical direction is input to the arithmetic circuit by key operation of the vertical direction setting key 18G provided on the keyboard 19. I did it like that.

Since a control circuit having the same configuration as that shown in FIG. 3 above is used, a detailed explanation thereof will be omitted.

Here, each control circuit for displaying the operation state of the head unit 5 in the horizontal or vertical direction on the drawing board 1 is used instead of a pulse generator that outputs a pulse signal for each unit operation amount of the head unit. It is also possible to arrange a code plate having a code pattern in which horizontal and vertical coordinate values on the drawing board are assigned absolute addresses, and to read the code pattern.

Also, instead of the reversible counter 33, a programmable divider that can arbitrarily set the division ratio is used.
If the frequency division ratio of the programmable divider is configured to be set by key operations on a keyboard, the coincidence detection operation can also be performed by the frequency division operation of the programmable divider.

Further, the third numerical value display section 23, the third coincidence display section 27, and the fifth and sixth direction display sections 30A and 30B are driven by a control circuit configured as shown in FIG. The rotational operation state of the head section 5 on the drawing board 1 is displayed by this.

That is, in FIG. 5, 49 indicates a code pattern 17A of a code plate 17 provided on the rotating shaft of the handle part 100 of the head part 5 so as to be rotated integrally with each scale 4A, 4B on the drawing board 1. This is an encoder that outputs a code pulse signal indicating the above-mentioned head unit 50 rotation operation amount by an absolute address.

The code pulse signal obtained from this encoder 49 is
The current value of the rotational operation amount of the head unit 50 is an inverted binary code signal, so it is decoded into a BCD code signal by the decoder 50 and then supplied to the secondary baseline correction circuit 51.

The above-mentioned secondary baseline correction circuit 51 is configured such that the secondary baseline setting value inputted to the arithmetic circuit 60 by key operation of the numerical value setting key 18B of the keyboard 18 is controlled by the secondary baseline setting key 18A (also used as the above-mentioned origin correction key). ing.

) is stored in the secondary baseline memory 52 by a key operation, the subtracter has a subtraction function to subtract the secondary baseline setting value from the current value indicated by the BCD code signal from the decoder 50. It is made up of.

A code signal indicating the current value corrected by the secondary baseline correction circuit 51 is sent to one input terminal 5 of the data comparator 53.
3A is supplied.

The other input terminal 53B of the data comparator 53 has
As will be described below, a data signal indicating a rotation operation setting value of the head section 50, which is set by key operations on the keyboard 18, is supplied from the rotation amount setting memory 54.

That is, the rotation operation setting value inputted to the arithmetic circuit 60 by key operation of the numerical value setting key 18H provided on the keyboard 18 can be stored in the rotation amount setting memory 54 by key operation of the rotation amount setting key 18H. The contents stored in the rotation amount setting memory 54 are supplied as a data signal to the other input terminal 53B of the data comparator 53.

The data comparator 53 has the same configuration as the logic circuit shown in FIG. A signal is output to the second and third output terminals 53b, 5.
3c outputs each direction instruction signal.

The first output terminal 53 of the data comparator 53 described above
The third coincidence display section 27 is driven by the coincidence detection signal outputted from the second and third output terminals 53b and 5.
The fifth and sixth direction display sections 30A and 30B are driven by each direction indicating signal outputted from the section 3c.

Nao, f7)' In the first example, the code pattern on the code plate is a 7-bit inverted binary code, so the amount of rotational operation of the head is detected with 5 degrees as the unit rotational operation amount. However, by increasing the number of bits of the code pattern, the unit rotational operation amount can be reduced and the angle reading resolution can be improved.

Furthermore, the above code pattern does not have to be an inverted binary code.

Furthermore, the current value of the rotational operation amount of the head section can be obtained by counting the number of pulses of the pulse signal using a pulse generator that outputs a pulse signal for each unit rotational operation amount of the head section. .

Furthermore, by using an integrated circuit such as a -chip microprocessor, the arithmetic circuit, control circuit, etc. in the embodiments described above can be constructed in an extremely compact form and housed in the head section.

In the embodiment configured as described above, the operating state of the head section 5 on the drawing board 1 can be displayed in the following manner.

That is, the operation state of the head section 5 in the horizontal or vertical direction on the drawing board 1 is determined by the first and second operation settings in the horizontal or vertical direction set by key operations on the keyboard 18. 2 is displayed on the numerical display section 21.22, and when the above setting value matches the current value of the operating state of the head section 5, the first or second coincidence display section 25.26 is lit. It is displayed that the operating state of the head unit 5 is in the desired setting state.

Therefore, since it is displayed that the head section 5 is in the correct operating state, drawing work can be performed accurately.

Further, when the head section 5 is not in the predetermined setting state, the operating direction for setting the correct operating state is the first to fourth setting state.
direction display sections 28A, 288° 29A, 29B.

Therefore, the first to fourth direction display sections 28A, 2
88° By operating the head unit 5 in the operating directions displayed at 29A and 29B, the head unit 5 can be brought into the correct operating state, improving the operability of the head unit 5 and increasing the efficiency of drawing work. It is possible to aim for

Furthermore, if the magnification scale is set by operating keys on the keyboard 18, it is possible to display that the head section 5 is in a predetermined setting state with an arbitrary magnification or scale factor, which makes it easier to draw enlarged or scaled drawings. It's easy to do.

Furthermore, if the repeat operation setting is performed by key operations on the keyboard 18, a match is displayed every predetermined operation movement amount of the head section 5, so that the work of drawing equally spaced parallel lines can be easily performed.

The head unit 50 rotation operation state on the drawing board 1 is determined by displaying the rotation operation set value set by the key operation on the keyboard 18 on the third numerical display section 23, and combining the above setting value with the head unit 50 rotation operation state. When the current value of the state matches, a match display indicating that the head section 5 is in the desired operating state is displayed by the third match display section 2T.

Therefore, it is possible to accurately rotate the head portion 50 so as to hold each scale 4A, 4B at an arbitrary set angle on the drawing board 1, and highly accurate drawing work can be performed.

Furthermore, when the head section 5 is not in the setting operation state, the operation direction for setting it in the correct operation state is displayed by the fifth or sixth direction display section 30A, 30B.

Therefore, the fifth or sixth direction display section 30A,
By rotating the head unit 5 in the direction indicated by 30B, the head unit 5 can be brought into the setting operation state, which improves the operability of rotating the head unit 50 and increases the efficiency of drawing work. be able to.

As is clear from the description of the above embodiments, according to the present invention, when drawing equally spaced parallel lines, a match is displayed for each predetermined operation movement amount of the head. By clearly displaying the operating status, it is possible to improve the efficiency of drawing work, and the intended purpose can be fully achieved.

Note that the present invention is not limited to the above-mentioned actual case; it is also possible to compare the current value and the set value in an analog manner to display a match, and also to use a buzzer or the like as a display means. The present invention includes many other modifications, such as being able to be driven, and being applicable to other drawing machines other than the track type universal parallel ruler.

[Brief explanation of the drawing]

FIG. 1 is a schematic external plan view of an embodiment in which the present invention is applied to a track type universal parallel ruler. FIG. 2 is an enlarged plan view showing the vicinity of the head portion of the above embodiment. 3 to 5 are circuit block diagrams showing an example of the electrical configuration of this embodiment, and FIG. 3 shows an example of a control circuit for displaying the operating state of the head section in the lateral direction. 4 shows an example of a data comparator in the above control circuit, and FIG. 5 shows an example of a control circuit for displaying the rotational operation state of the head section. FIG. 6 is a plan view showing an example of the code pattern of the code plate applied to the above embodiment. 1...Drawing board, 2,3...Rail, 4A, 4B...
Scale, 5... Head part, 6.7... Carriage, 10... Handle part of head part, 1316... Rotating plate, 13A. 16A...Pulse reading sample, 17...Code plate, 1
7A...Chord pattern, 18...Keyboard, 2
0... Display window, 21.22, 23.24... Numerical display section, 2526.27... Match display section, 28A, 28
B.29A. 298.3OA, 30B...direction display section, 31...
Pulse generator, 33... Reversible counter, 35.53.
...Data comparator, 36...Data input circuit, 37
, 38. 52.54...Memory, 49...Encoder, 5
0...Decoder, 60... Arithmetic circuit.

Claims (1)

[Claims] 1 A head part that is operated to move in any direction on the drawing board,
A setting means for setting a horizontal setting value and a vertical setting value indicating a desired movement operation position of the head, and a setting means for detecting the current movement operation position of the head and setting the horizontal direction current value and the vertical direction current value. A detection means outputs each detection signal indicating the above, and compares each current value indicated by each of the above detection signals with each set value set by the above setting means, and determines that the above current value is an integral multiple of the above set value. A plotting machine comprising a comparison means for outputting a coincidence detection signal every time a value matches, and a display means driven and controlled by the coincidence detection signal from the comparison means.