JPS5923560B2 - automatic drawing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic drafting machine, and more particularly to a computer-controlled automatic drafting machine.

Automatic drawing machines that automatically draw drawings under computer control are used in many fields.

In conventional automatic drafting machines, a coordinate reading device is generally used to input coordinate data, but in these devices, a reading table and a writing or drafting table are used as separate units, and a computer that controls them all and a computer for data input are used. When using conventional automatic drafting machines, individual devices such as typewriters and external storage devices are provided separately. In order to operate these necessary devices, 1- repeated walking movements and sitting-to-stand movements within this wide space are required;

The present invention aims to simplify and reduce the cost of the device, and the reading table, drafting table, costumer, external storage device, and other devices are provided in a pile-like body as an integrated structure, so that reading and drafting functions can be achieved with a single device. The present invention relates to an automatic drawing machine that is particularly easy to handle and can be used in a form similar to normal office work by being placed alongside an office desk commonly used in an office without requiring a large space.

The invention will now be described in detail with reference to the drawings.

In FIG. 1, a coordinate reading device, that is, a tablet 11 is provided on a drawing panel 12 that can be opened and closed, and a reading table 13 made of a transparent material, for example, glass, and a position coordinate detection instruction that can be freely moved on the reading table. It has a cursor 14.

This position detection instruction cursor is connected to a processing device 15 including a code 14e microcomputer.

In this processing device, the position coordinates of the position detection instruction cursor 14 on the reading table 13 are determined based on the position detection instruction signal from the cursor 14.

Note that the keyboard 16 and operation panel 17 of the processing device 15
In addition, display devices 18 are arranged on the left and right sides of the upper surface of the pile-shaped body 10.

A writing device 19 is disposed below the tab knot 11.

This writing device has a drawing table 20 provided facing a reading table 13 supported by a drawing panel 12 of a tablet 11.

As a result, the reading table 13 and the drafting table 20 have a two-tier structure, upper and lower.

This drafting table 20 and the tab knot drafting panel 1
In the space between 2 and 2, a writing-\rad 21 is provided.

This writing head is provided on an X-direction sliding rail 23 that runs on rails 22a and 22b arranged on both sides of the drafting table 20, and is constructed so that it can run on this sliding rail in the 'k and Y directions.

The writing head 21 is provided with a magnetic detector 21a composed of a Hall element and a hollow pen 21b.

The reading table 13 is provided on a drawing panel 12 which can be opened and closed as a fulcrum on a hinge 12a, and this drawing panel which can be opened and closed can be held in an open state at an angle of about 60 degrees by an arm (not shown).

Next, the electric circuit configuration of the above-mentioned automatic drawing machine will be explained.

As shown in FIG. 3, the electromagnet 14 of the position detection instruction cursor
When the main switch 51 (see FIG. 4) is turned on, a is brought into an excited state.

This electromagnet 14a is a transparent window 1 made of a transparent acrylic plate.
It consists of a coil installed around 4c.

A cross-shaped index 14d for indicating coordinate points is formed in the transparent window 14c.

The magnetic field generated by the electromagnets 14a and 14c passes through the reading table 13 made of a glass plate and is detected by the magnetic detector 21a of the writing pad 21.

That is, the center of the magnetic field of the electromagnet 14a, that is, the center of the index 14d, is magnetically sensed by the magnetic detector 21a, and the index 14d is detected by the position coordinate detection device that controls automatic tracking using the zero position method of the writing/rad 21 as described later. The center position of is recognized and the position coordinates are detected.

To explain this position coordinate detection device, for example, the Hall elements 21a-21a-2 constituting the magnetic detector 21ak.
is a voltage signal conversion circuit 34 that converts the output of the Hall element into a voltage signal. They are connected at 34 degrees.

Voltage signal conversion circuit 34. 34° output is differential amplifier 3
5 and to threshold setting circuits 36 and 37, respectively.

The output of the differential amplifier 35 is connected to the absolute value circuit 38 and the voltage -
It is connected to one input of an AND gate circuit 40 via a frequency conversion circuit 39 .

Further, the output of the differential amplifier 35 is connected to one input of a gate circuit 40 via a comparator 41.

The outputs of the threshold value setting circuits 36 and 37 are connected to the other input of the AND gate circuit 40 via an OR gate circuit 42.

The output of this AND gate circuit 40 is connected to a selection gate 43.

The output of this selection gate 43 is connected to a pulse counter 44.

The Tahars counted by the pulse counter 44 represent the position coordinates, and the means for detecting the position coordinates, that is, in this embodiment, the circuit configuration from the magnetic detector 21a to the pulse counter 44 for obtaining this pulse, and the The position coordinate detection device includes a pulse motor 48 for driving a writing device to which a magnetic detector 21a is attached.

The selection gate 43 and the pulse counter 44 are also coupled to an arithmetic processing circuit 45, and this arithmetic processing circuit 45 is connected to the keyboard 1.
6 and an external storage device 46.

The output of the pulse counter 44 is sent to the pulse motor drive circuit 47.
It is coupled to a pulse motor 48 via.

This pulse motor 48 is coupled to provide a driving force to the writing device 19 for moving the X-direction sliding V-rule 23 and writing pad 21 of the writing device 19 of FIG.

Further, a sononoid drive circuit 49 is connected to the arithmetic processing circuit 45, and a solenoid 50 (shape not shown) for vertical movement of the writing instrument attached to the writing instrument 21 is connected to the sononoid drive circuit 49. .

The operation of the above-mentioned automatic drawing machine will be explained.

When the position coordinate detection instruction cursor 14 shown in FIG.
e ''k to the processing device 15.

Here, when the position detection instruction cursor 14 is located within the magnetic detection range of the magnetic detector 21a on the writing head 21,
In response to the position detection instruction signal, the writing pad 21 of the writing device 19 moves to the center position of the index 14d of the cursor 14, but in this case, the position of the writing pad 21 and the center position of the index 14d of the cursor 14 are Difference information is calculated in the processing device 15, and the running speed of the writing head 21 is determined according to the difference signal, and the writing head 21 moves to the cursor 14 at this speed.
is moved toward the center position of the index 14d.

Although only the case in the X direction will be described in detail below, the same applies to the Y direction.

When the magnetic detector 21a of the writing/rad 21 in the position coordinate detection device detects the magnetic field of the electromagnet 14a of the cursor 14, the Hall element 21 21 of the detector 21a generates an output signal a-1 fa-2.

The output signals of these Hall elements are transferred to the voltage signal conversion circuit 34.
．． 34° to the differential amplifier 35.

This differential amplifier 35 generates an output signal according to the difference between the output signals of the Hall elements, and this output signal is converted into an absolute value by an absolute value circuit 38 and supplied to a voltage-frequency conversion circuit 39.

Further, the voltage signals of the voltage signal conversion circuits 34 and 342 are supplied to the AND gate circuit 40 via the threshold value setting circuits 36 and 37 and the OR gate circuit 42.

If the signal passed through the OR gate circuit 42 is large enough to be distinguished from noise, the gate circuit 40 is opened.

A pulse signal corresponding to the positional difference between the magnetic detector 21a and the cursor 14 is supplied to the AND gate/circuit 40 from the voltage-frequency conversion circuit 39.

Since this pulse signal is an absolute signal, its level is converted according to the polarity recognized by the comparator 41.

The position difference pulse signal passed through the AND gate circuit 40 is supplied to a pulse counter 44 via a selection gate 43.

This pulse counter 44 detects the number of pulses and the direction of rotation of the pulse motor.

The selection gate 43 is configured to receive a pulse signal only when an instruction is given to the position detection instruction cursor operation section 14b, l:.

The output signal of the pulse counter 44 is sent to the motor 1 drive circuit 47.
This drive circuit is fully activated.

As a result, the pulse motor 48 rotates according to the count of the counter 44 by the drive signal from the motor drive circuit 47.

Here, when the difference between the center position of the indicator 14d of the pointing cursor and the center position of the magnetic detector 21a in the writing head 21 is zero, the rotation of the pulse motor stops, and therefore the tracking of the writing-\rad 21 is completed. .

On the other hand, information indicating the X-coordinate position obtained by the pulse counter 44 is transferred to the arithmetic processing circuit 45 by pressing a switch provided on the operation section 14b.

The transfer information is transferred to the external storage device 46 after being subjected to predetermined arithmetic processing by pressing a predetermined key 16 on the keyboard 16.
is memorized.

Here, the above-mentioned predetermined arithmetic processing relates to, for example, the following matters.

That is, based on a pre-stored program that defines the format of coordinate reading, various function information specified by operating the key 16a, coordinate information of the indicated point obtained by the above method, or numerical values specified by key operation, etc. , and organize this information according to the coordinate reading format described above to create information to be stored in the external storage device 46.

As described above, the coordinates of the sheet to be read placed on the reading table can be read.

On the other hand, in the drawing operation, this stored information is read out via the floppy disk drive 46ak depending on the purpose, and this information is used, for example, to distinguish point sequence coordinate information or all drawing areas and non-printing areas according to the function information, etc. Convert the writing pen vertical movement information, etc., and send it to the former all pulse counters to drive the pulse motor and move the writing pen.Meanwhile,
The latter is sent to a sononoid drive circuit to move the writing pen up and down.

Through the above operations, drawings are automatically drawn on the paper placed on the drawing table 20.

Note that the sheets placed on the drafting table 20 are exchanged by opening the 13 openable/closable reading tables.

Now, to further explain the details of this automatic drafting apparatus, a sheet to be read such as a drawing to be read is glued to the reading table, and the position of an arbitrary point on the sheet to be read is read according to the instructions of the instruction cursor.

The reading table 13 is hinged so that it can be opened and closed, so there is a possibility that some wobbling may occur. When opening and closing the table, it is necessary to always maintain a constant relationship between the closed position of the reading table and the position coordinate detection device.
2a with play, and the tablet 11
A truncated cone-shaped convex portion 11a is provided on the lower square of the lower surface, and a recess (not shown) that fits into the convex portion 11a is provided at a position corresponding to the convex portion 11a in the portion that supports the table 13 in the closed state. J: A separate positioning mechanism is provided to ensure stable reading accuracy.

Further, the sheet to be read is adhesively fixed to the reading table with an adhesive tape or the like, and in order to set the adhesive position at the center of all the reading tables, the reading table 13 has a cross-shaped ruled line 13a.
is formed.

Similarly, similar ruled lines are formed on the drafting table 20 as well.

Also, an adhesive tape holder 10a for storing the aforementioned adhesive tape.
is attached to the stake-shaped body 10, and the adhesive tape can be pulled out and cut.

In addition, on the front side of the stake-shaped body 10, a pen holder 10b is used to store writing instruments such as hollow pens and ballpoint pens of various thicknesses attached to the writing head 21. The holder for the hollow pen is designed to keep an appropriate amount of humidity at all times to prevent it from drying out.

Incidentally, since the drawing performance of the hollow pen is extremely sensitive to humidity, a hygrometer 10c having a detection section thereof is installed in the space between the reading table and the drafting table.

Furthermore, the external storage device 46 of the processing device 15 is integrally attached to the stake-shaped body, preferably to the legs as shown in FIG. It is placed in front of the body.

As described above, according to the present invention, the reading table and the drafting table are arranged in this order in an upper and lower two-tiered structure, and the writing table is arranged between them, and in detecting the position coordinates,
Since the position detection instruction cursor and the writing head are magnetically coupled and the position coordinates are detected by the zero position method, the coordinate reading ability and drawing ability are the same as those of conventional coordinate reading equipment and drawing devices, but the writing head is By using magnetic coupling, it is shared for detecting position coordinates, which reduces the number of parts, simplifies the configuration of the device, and reduces costs.Furthermore, it has a two-tier structure (upper and lower), and is configured into a pile-shaped body. Since the reading table can be opened and closed, it is easy to replace not only the sheet to be read but also the drawing paper, and it is closed when reading or drawing. Since it is used in the motor, it is possible to reduce the noise caused by the pulse motor drive and to obtain a dustproof effect.

Further, in addition to this, the workability of reading, drawing, and drafting is further improved by providing an external storage device on the pile-shaped body, a hygrometer, and the like.

Furthermore, by providing a positioning mechanism for fixing the reading table, stable reading becomes possible.

[Brief explanation of drawings]

Fig. 1 is a plan view of an automatic drawing machine according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing a front cross section of the automatic drawing machine of Fig. 1, and Fig. 3 is a circuit diagram of the automatic drawing machine. , and FIG. 4 respectively show front views. 11...Tab unit, 12...Drawing panel, 12a...Hinge, 13...Reading table, 14...Position detection instruction cursor sonope 15 ...Processing device, 19...Writing device, 20...Drawing table, 21...
Writing head, 21a...Magnetic detector, 21b.
...Hollow Hen.

Claims (1)

[Scope of Claims] 1. A reading table that can be opened and closed, and a position detection instruction cursor that is provided to be freely movable on the reading table, has magnetic field generating means, and instructs to detect position coordinates on the reading table. and a position coordinate detection device that has a magnetic detector that detects a magnetic field from the instruction cursor and detects the position coordinates of the instruction cursor on the reading table in response to a position detection instruction signal from the instruction cursor. , comprising a drafting table disposed facing directly below the reading table, a processing device for processing signals etc. from the position coordinate detection device, and a magnetic detector of the position coordinate detection device, The writing head is actuated by the output signal of the writing head, and is disposed in a space between the reading table and the drafting table, which have a two-tiered upper and lower structure, and is slidably attached to the drafting table. An automatic drafting machine characterized in that a reading table having a tiered structure, a drafting table, and a processing device are integrally arranged in a pile-shaped body. 2. The automatic drafting machine according to item 1, wherein the openable and closable reading table is attached to the rear end of the pile-shaped body with a hinge with some play, and when the reading table is closed, the reading table is placed at a predetermined and accurate position by a positioning mechanism. 3 Attach the external storage device of the processing device integrally to the desk-like body,
2. The automatic drafting machine according to claim 1, wherein the storage medium inlet/outlet of the external storage device is disposed on the front surface of the pile-shaped body. 4 A first structure in which a hygrometer is provided on the pile-shaped body and the humidity detection part of the hygrometer is arranged in the space between the reading table and the drafting table.
Automatic drafting machine as described in section.