JPS6387300A - Plane coordinate plotter - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the configuration of a plane coordinate plotter that recognizes the position coordinates of a desired point on a plane by manually aiming at the point.

The present invention is used in combination with a processor that performs numerical processing of coordinates, and is suitable for use in automatic drawing devices and other input devices.

〔overview〕

The present invention provides a planar coordinate plotter that digitizes the X and Y coordinates of a sight that is manually moved. The system configuration includes simple mechanical structure and electrical circuit, and provides an economical device.

[Conventional technology]

Conventional planar coordinate plotters can be roughly divided into two types.

The first one is to set a sight on the arm that moves on a flat plate,
Mechanically detects the amount of movement with respect to the X and Y axes,
This is converted into an electrical signal and extracted.

The second type is an electromagnetic induction type, which has a structure that includes a special flat plate on which a large number of electromagnetic coils are arranged to create an electromagnetic field, and a pink-up coil that moves on this flat plate.

[Problem that the invention seeks to solve]

In the first type, the X-axis and Y-axis mechanisms for moving the aim are heavy and large, and especially those with a large plane plate are heavy and expensive as a whole.

In the second case, the flat plate is extremely expensive. In particular, those with large flat plates require an increased number of coils and are very expensive.

The present invention solves these drawbacks, has a simple mechanism,
An object of the present invention is to provide a plane coordinate plotter which is inexpensive and can use a normal plane plate such as a wood or synthetic resin plate.

[Means for solving problems]

The present invention relates to a handler that is manually moved on a flat plate and is provided with a sight for positioning an input point on the flat plate, and an X on the flat plate of the handler.
In a plane coordinate plotter equipped with an electric circuit that sends out output signals corresponding to the coordinates and the Y coordinate, each plotter is rotatably supported around its axis, and each axial direction is parallel to the X axis and Y axis of the plane plate, respectively. First and second rotating shafts are provided, and each of the two rotating shafts is pushed through with a spool that can freely move in the axial direction and rotate together with each rotating shaft, and one end of each of the spools is attached to the spool. The other ends of the threads are wound around the handler at positions perpendicular to each other with the aim as a reference point, and the threads rotate together with the two rotating shafts, and the diameter of the threads is the same as the diameter of the spool. , and each of the two rotating shafts is provided with guide means for determining the position in each axial direction of the bobbin thread inserted through the two rotating shafts, and the guide means of the first rotating shaft is connected to the first The position of the guide means of the second rotation shaft is moved according to the rotation of the pulley inserted through the second rotation shaft, and the position of the guide means of the second rotation shaft is changed according to the rotation of the pulley inserted through the first rotation shaft. It is a movable structure, and each of the two rotating shafts is provided with a driving means that applies rotational torque to the rotating shaft in a direction in which the thread is wound,
The invention is characterized in that each of the two rotating shafts is provided with a rotation sensor that generates an electrical signal indicating the direction and amount of rotation thereof and supplies the electrical signal to the electrical circuit.

Preferably, the guide means includes a U-shaped element each provided with a small hole through which the thread passes, and a thread-like belt fixed to the U-shaped element and wound around a pulley.

Preferably, the electric circuit includes an input trigger switch that is operated when the sight is at the desired input coordinate position, and the input trigger switch is provided integrally with the handler.

The electrical signals generated by each rotation sensor are a pulse signal corresponding to the rotation amount and a polarity signal indicating the rotation direction, and the electric circuit includes two counter circuits that count the output pulse signal of each rotation sensor according to the polarity signal. It is preferable to include a reset means for resetting these two counter circuits when the aim is at a coordinate origin set on the flat plate, and an interface for transmitting the contents of the two counter circuits.

[For production]

Since the pincushion and pulley, which are inserted through the two rotating shafts parallel to the X and Y axes, have the same diameter, one The length of thread that a spool unwinds or winds in is equal to the length of thread that is moved by a pulley coaxial with the spool.

Therefore, even when the handler moves diagonally, the intersection angles of the two threads connecting the handler from the two threads are always at right angles.

Therefore, when the aim of the handler is moved from a first point on a plane to any other second point, the amount of rotational displacement of each spool is proportional to the difference in the X and Y coordinates between these two points.

A rotation sensor provided on each rotating shaft generates a different polarity signal corresponding to the rotational direction of each rotating shaft, in addition to a pulse signal caused by the rotation of the shaft. Therefore, each counter circuit adds or subtracts the number of pulses according to this polarity signal.

If you reset the sight after aiming at the coordinate origin of the flat plate, the contents of the counter will become "0". If you then operate the input trigger switch each time you aim at each input point, the above coordinate origin will be set. The coordinate values of each input point relative to are obtained.

〔Example〕

Next, embodiments of the present invention will be described using the drawings.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. In this figure, the plane plate 21 is indicated by a two-dot chain line.

In FIG. 1, the handler 1 is moved manually,
Visually align the sight IA with the input point on the flat plate.

The sight IA is a transparent disc with a cross mark attached to it, and is rotatably attached to the main body of the handler 1.

The first rotating shaft 2X and the second rotating shaft 2Y are provided parallel to the X-axis and Y-axis of the plane plate 21, respectively, and are supported rotatably around the respective axes, and the keys 2A and 2Y are respectively oriented in the axial direction. 2B is provided over almost the entire length.

The above-mentioned rotatable shafts 2X and 2Y can be freely moved in the axial direction, but are restricted by the above-mentioned keys, respectively.
The threads 3X and 3Y, which rotate together with the threads, are inserted therethrough. Carbon fiber composite yarns 4X and 4Y are wound around each thread. The other end of each of the prefectures 4X and 4Y is attached to the aiming IA of the handler 1 at two points perpendicular to the position of the aiming point.

At one end of the rotating shafts 2X and 2Y, there are threads 3X and 3Y.
Pulleys 5X and 5Y having the same diameter are inserted through the pulleys 5X and 5Y, respectively, and rotate together with the rotating shafts.

The rotating shafts 2X and 2Y are provided with guide frames 6X and 6Y for determining the axial positions of the bobbins 3X and 3Y, respectively, so as to be freely rotated relative to the rotation of the rotating shafts. At both ends of the guide frames 6X and 6Y, driven pulleys 7Y and 7x are provided at opposing positions of the pulleys 5Y and 5X, respectively, by rotation of the pulleys 5Y and 5X.
Both ends of belts 8Y and 8X, which are reversed at , are fixed. These belts 8X and 8Y each have a spring 8A
and 8B.

At the other ends of the rotating shafts 2X and 2Y (opposite ends of the pulleys 5X and 5Y), a composite thread 4X is attached to each rotating shaft.
and 4Y are provided with torque motors 9X and 9Y that constantly apply rotational torque in the direction in which windings 3X and 4Y are wound onto the threads 3X and 3Y, respectively.

The rotational axes 2X and 2Y are provided with rotation sensors IOX and IOY that generate electrical signals indicating their respective rotation amounts.

The guide frames 6x and 6Y are U-shaped elements provided with small holes (not shown) that pass through the composite yarns 4X and 4Y, respectively.

The handler 1 is provided with an input trigger switch IB that is operated by an operator when the sight IA is at a desired input coordinate position, and a reset switch IC that sets the coordinate origin of the plane plate. These two switches IB and IC are electrically connected to the cable line 15.

Figure 2 is a partial view of the A-A shown in Figure 1, and shows the driven pulley 7X.
, Bell) 8X and a side view of the spring 8A.

Next, the operation of this embodiment will be explained.

In FIG. 1, when the operator moves the handler 1 to the right (in the positive sign direction of the X-axis), the bobbin winder 3Y sends out the thread 4Y by the amount of the displacement. At this time, the rotating shaft 2Y rotates counterclockwise when viewed from the pulley 5Y side, and the pulley 5Y also rotates with the belt 8Y.
move counterclockwise. Therefore, the guide frame 6X, which determines the position of the bobbin 3X in the X direction, moves to the right in the figure. Since the bobbin 3Y and the pulley 5Y have the same diameter, rotational torque is applied to the rotating shaft 2Y by the torque motor 9Y, so that the thread 4Y does not become slack. For this reason, handler 1
The moving distance of the guide frame 6X in the X direction is equal.

Similarly, when the handler 1 is moved downward (in the direction of the negative sign of the Y axis), the Y
The distance traveled in the direction is equal.

When the handler 1 is moved in a diagonal direction, the threads 3X and 3Y simultaneously rotate by an amount proportional to the displacement of the Y component and the X component, respectively, to unwind or wind the threads 4x and 4Y. At this time, the guide frames 6X and 6Y move by displacement amounts of the Y component and the X component, respectively. Therefore, the angle that threads 4X and 4Y make with respect to aim IA is always a right angle.

Rotation sensors IOX and IOY are attached to the two rotation axes 2X and 2Y, respectively, and generate a rotation amount pulse for each unit rotation angle of each axis, and send out a polarity signal representing the direction of rotation. As shown in FIG. 3, the output rotation amount pulses of each rotation sensor IOX and 10Y are input to counter circuits 1)Y and IIX, respectively, and these counter circuits 1)Y and IIX correspond to rotation polarity signals, respectively. Add or subtract the contents of the counter.

The contents of each counter circuit 1)Y and 1)X are provided to the microprocessor 12.

When the reset switch IC of the handler 1 is operated, the microprocessor 12 generates a reset signal R to reset the contents of the two counter circuits 1) Y and IIX to "0". When the input trigger switch IB of the handler 1 is operated, the microprocessor 12 reads the contents of the two counter circuits 1) Y and IIX, respectively, and sends a signal to the interface 13 (R3-232C in this example) adapted to that interface 13. It converts the signal into a signal and transmits its contents.

FIG. 4 is an overall perspective view of an embodiment of this embodiment.

In this figure, the rotating shaft 2X, each means attached thereto, and the bell) 8Y and each means attached thereto are shown in the cover 1.
4X, the rotating shaft 2Y and the means attached thereto, and the belt 8X and the means attached thereto are housed in the cover 14Y, and the flat plate 21 is fixed to the frames 17X and 17Y by fasteners 16. This cover 14
The lengths of X and 14Y must correspond to the horizontal and vertical dimensions of the flat plate, but their cross-sectional shapes can be made small.

In this figure, the reference numeral 13 indicates an interface (R3-232C) with a host device not shown, and the reference numeral 15 indicates a cable line including circuits for electric signals of the input trigger switch IB and the reset switch IC.

Since this flat plate does not require any special mechanism, a commercially available drawing board of any shape can be used.

In the above description, it is assumed that the torque motors 9X and 9Y always generate torque by applying current, but the torque motors 9X and 9Y can be subjected to servo control. That is, when the device becomes extremely large, it is conceivable that the yarn becomes slack as the handler moves.

For this reason, it is preferable to servo control the current supplied to the torque motor so that the torque becomes constant while the handler is moving, that is, while the torque motor is rotating.

Torque measurement values for this servo control can be obtained by adding one pulley that bends the thread and detecting the force applied in the axial direction of the pulley, or by detecting changes in the current supplied to the torque motor. etc. can be taken.

〔Effect of the invention〕

As explained above, the device of the present invention has a simple mechanism and is extremely light in weight. This device can be manufactured at significantly lower cost than conventional plane coordinate plotters. The apparatus of the present invention is particularly economical for large-sized apparatuses (for example, A2 size or larger).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a partial view taken along line A-A in FIG. FIG. 3 is a diagram showing the plotter configuration of the electric circuit of the above embodiment. FIG. 4 is an overall perspective view of one embodiment of the above embodiment. 1...Handler, IA...Aim, IB...Input trigger switch, IC...Reset switch, 2A, 2
B...key, 2X, 2Y...first and second rotating shaft, 3X, 3Y...spindle, 4X, 4Y...thread, 5X
, 5Y...pulley, 6X, 6Y... guide frame, 7X,
7Y... Driven pulley, 8A, 8B... Spring, 8X,
8Y...Belt, 9X, 9Y...Torque motor, I
OX, IOY... Rotation sensor, IIX, IIY...
Counter circuit, 12... Microprocessor, 13.
...Interface (R3-232C), 14X,
14Y...Cover, 15...Cable line, 16...
- Fastener, 17X, 17Y...Frame, 21...Flat plate. Example configuration explanatory diagram Fig. 1

Claims (5)

[Claims] (1) A handler that is manually moved on a flat plate and equipped with a sight for positioning the input point on the flat plate, and the X and Y coordinates of the above-mentioned sight on the flat plate of this handler. In a planar coordinate plotter, the planar coordinate plotter is provided with an electric circuit that sends out an output signal corresponding to the planar plate, and first and second plotters are rotatably supported around their respective axes and whose axial directions are parallel to the X-axis and Y-axis of the planar plate, respectively. A rotating shaft is provided, and a spool is inserted into each of the two rotating shafts, which can move freely in the axial direction and rotate together with each rotating shaft. Threads attached at positions perpendicular to each other with the above-mentioned sight as a reference point are wound around the handler, and pulleys that rotate together with the above-mentioned two rotating shafts and whose diameters are equal to the diameter of the above-mentioned threads are inserted into the above-mentioned two rotating shafts. Each of the two rotating shafts is provided with a guide means for determining the position of the thread in each axial direction, and the guiding means of the first rotating shaft is inserted into the second rotating shaft. The position of the guiding means of the second rotating shaft is moved according to the rotation of the pulley inserted into the first rotating shaft. , Each of the two rotating shafts is provided with a driving means that applies a rotational torque to the rotating shaft in the direction of winding the thread, and each of the two rotating shafts generates an electric signal indicating the direction and amount of rotation thereof. A planar coordinate plotter comprising a rotation sensor that applies rotational force to the electric circuit. (2) A claim in which the guide means includes a U-shaped element each having a small hole through which the thread passes, and a thread-like belt fixed to the U-shaped element and wound around a pulley. The planar coordinate plotter according to item (1). (3) The planar coordinate plotter according to claim (1), wherein the electric circuit includes an input trigger switch that is operated when the sight is at a desired input coordinate position. (4) The planar coordinate plotter according to claim (3), wherein the input trigger switch is provided integrally with the handler. (5) The electric signal generated by each rotation sensor is a pulse signal corresponding to the rotation amount and a polarity signal indicating the rotation direction, and the electric circuit counts the output pulse signal of each rotation sensor according to the polarity signal. Claims include two counter circuits, reset means for resetting the two counter circuits when the sight is at a coordinate origin set on a flat plate, and an interface for transmitting the contents of the two counter circuits. The planar coordinate plotter according to item (1).