JPH0649398B2 - Pen stocker recognition method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for recognizing a rotary pen stocker which is provided in a machine body of an automatic drafting machine and holds a plurality of writing instruments.

[Conventional technology]

This type of pen stocker is detachably and rotatably arranged in the body of an automatic drafting machine, and a desired one of a plurality of pen holders of the pen stocker and a pen head are automatically exchanged with each other. It is configured to be able to do. Before the automatic drafting machine shifts to the drawing operation, it is necessary to determine whether or not the pen stocker is attached, determine the type of the attached pen stocker, and set the origin of the pen stocker. Conventionally, the above three judgments are
As shown in US Pat. No. 4,518,972,
This is done with three detectors.

[Problems to be solved by the invention]

As described above, the method of detecting the presence / absence, the type, and the origin of the pen stocker by the three detectors has a defect that the cost becomes high and the apparatus becomes complicated.

The present invention aims to eliminate the above defects.

[Means for solving problems]

In order to achieve the above object, the present invention provides a method for detecting the origin, type and presence of a rotary pen stocker having a plurality of pen holders on its outer periphery, which is detachably connectable to a motor, wherein a circular wall of the pen stocker is used. A type display detected portion is provided, and one sensor for the detected portion is provided on a non-rotating side at a position where the detected portion can be detected, and when the motor is rotated in a predetermined direction, the sensor is The presence or absence of a pen stocker is recognized by whether or not the detected part can be detected, the type of the detected part is detected by the sensor to recognize the type of the pen stocker, and the sensor detects the proper position of the detected part. Then, this detected position is used as the origin of the pen stocker.

〔Example〕

Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

In FIG. 5, reference numeral 2 denotes a machine body of a paper drive type automatic drafting machine, on which Y rails 4 are installed on both sides, and a pen head 8 linked to a Y motor 6 is movably fixed to the Y rails 4. There is. 10 is a platen, 12 is a drawing roller, 1
A driving roller 4 is linked to the X motor 16, and a pressure roller 18 is elastically contacted with the driving roller 4. When the drive roller 14 is driven by the X motor 16, the paper 20 sandwiched between the drive roller 14 and the pressure roller 18 on the platen 10 is provided.
Are sent in the front-back direction of the machine body 2, and the drawing roller 12 is driven in the same direction in cooperation with the drive roller 14. The controller 22 controls the X motor 16 to feed the paper 20 in the front-rear direction of the machine body 2, while controlling the Y motor 6 to feed the pen head 8 along the Y rail 4 and is incorporated in the pen head 8. Pen head 8 by controlling solenoid 14
The pen holder 26 is controlled to move up and down, and the writing tool 28 is brought into contact with or separated from the paper 20 on the drawing roller 12 to perform a predetermined drawing on the paper 20. A box 30 is provided on one side of the machine body 2, and a stepping motor 32 is fixedly installed on the bottom wall of the box 30. A mounting board 34 is fixed to the output shaft of the stepping motor 32, and two index holes are formed in the board 34. Reference numeral 36 denotes a pen stocker in which a plurality of pen holders 36b are formed on the outer peripheral portion of the disk-shaped portion 36a at regular intervals, and a shaft body 36c at the center thereof.
A board 42 having a pair of protrusions 38 and 40 is fixedly provided at the lower end of the board. A tubular body 44 is formed on the shaft body 36c, and a slit 46 having a predetermined width is formed on a peripheral wall of the tubular body 44. Reference numeral 48 denotes a U-shaped body fixedly mounted on the bottom wall of the box 30, one side of which is provided with a light receiving element such as a high-sensitivity phototransistor and the other side of which is an infrared light emitting diode (LED) And other light emitting elements are provided. The light emitting and light receiving elements 50 and 52 form a sensor 54. The pen stocker 36 is inserted through the hole in the upper wall of the box 30, and the projections 38 and 40 of the board 42 are attached to the mounting board 34.
Pen stocker 3 by fitting the index hole on the side
6 can be detachably connected to the output shaft of the stepping motor 32. In this connected state, the lower portion of the peripheral portion of the cylindrical portion 44 of the pen stocker 36 where the slit 46 is formed is configured to be loosely fitted in the recessed portion of the sensor 54. The pen head 8 is the Y rail 4
Between the pen holder 26 of the pen head 8 and a desired one of the pen holders 36b of the pen stocker 36 by the operation of approaching in the box 30 direction to a predetermined position along with and then moving in the direction away from the box 30. , And the writing instruments 28 are automatically exchanged with each other. Next, the operation of detecting the type of the pen stocker 36 mounted in the box 30, the presence / absence of the pen stocker 36, and the origin of the pen stocker 36 will be described with reference to the flowchart of FIG.

First, the controller 22 is turned on and the controller is reset. Next, the controller 22 opens the space between the light emitting / light receiving elements 52 and 50 of the sensor 54 (OPE
N) or blocking (CLOSE) is determined (block 1). If it is OPEN, the stepping motor 32 is driven, and the output shaft of the stepping motor 32 is rotated counterclockwise.
After rotating by 0 pulse (block 2), it is then determined whether or not the sensor 54 is CLOSE (block 3). No
If so, zero is written in the stocker flag of the RAM (block 4), the controller 22 recognizes that there is no pen stocker (block 5), displays the pen stocker no on the display (block 6), and the buzzer indicates that there is no pen stocker. Warning. When it is determined in the decision block 1 or 3 that the sensor 54 is CLOSE, RA
"1" is written in the stocker flag of M (block 7), and the output shaft of the stepping motor 32 is rotated counterclockwise by one pulse. Next, it is judged whether or not the sensor 54 is CLOSE (block 9), and if it is CLOSE, the stepping motor 32 is driven by one pulse again, and this operation is repeated until the sensor 54 becomes OPEN. When the sensor 54 becomes OPEN, the rotational position of the pen stocker 36 at this time is recognized as the origin of the pen stocker 36 (block 10). Next, the controller 22 rotates the output shaft of the stepping motor 32 counterclockwise (block 11), determines whether the sensor 54 is CLOSE,
If No, the sensor counter of the controller 22 is incremented by 1, and the stepping motor 32 is driven counterclockwise again for one pulse (block 11).
It is determined whether 4 is CLOSE. If No, ie, OPEN, 1 is further added to the sensor counter, and the stepping motor 32 is driven counterclockwise by one pulse. By repeating this operation, the sensor counter of the controller 22 converts the width of the slit 46 into a pulse number and counts it. The width of the slit 46 of the pen stocker 36 in the direction of rotation is equivalent to 5 pulses for a normal hollow pen.
The number of pulses is set to be less than the pulse, and the stocker for pencil is set to be more than 6 pulses. When the determination block 12 determines Yes, the determination block 14 determines whether the sensor counter is 5 or less, and if No, the controller 22 determines
The pen stocker 36 mounted in the box 30 is recognized as a pencil stocker (block 15), and if Yes, it is recognized as a normal stocker (block 1).
6).

In the above, the presence / absence, type, and origin of the pen stocker are detected by the slit groove having a predetermined width, but the same thing can be said, as shown in FIG. 8, a plurality of slits 56 corresponding to the type of the pen stocker are formed in the cylindrical portion of the pen stocker 58. It is also possible to form it on the peripheral wall of 60. In this case, when the pen stocker 58 is connected to the stepping motor 62, the slit 56 is always set at a position displaced from the detection line of the sensor 64, and the slit 56 is positioned at the stable point a of the motor 62 on the detection line of the sensor 64. Set not to. In this way, by setting the formation position of the slit 56, the sensor 64 is set to OP when the pen stocker 58 is attached.
The presence or absence of the pen stocker 58 can be detected by detecting whether it is EN or CLOSE, and the type of the pen stocker 58 can be detected by detecting the number of slits 56 by the sensor, and the first slit 56 can be detected. The origin of the pen stocker 58 can be detected by detecting.
For example, a plurality of slits 56 within the rotation angle of 10 pulses
When the pen stocker 58 is attached, the sensor 64CLOSE is determined, and then the pen stocker 58 is rotated counterclockwise for 10 pulses, and during this rotation, it is determined whether or not the sensor 64 is OPEN. , Ye
If s, the pen stocker 58 is further rotated counterclockwise by 10 pulses, and then the pen stocker 58 is rotated counterclockwise until the sensor 64 first opens.
Next stepping motor 6 when this OPEN is performed
The stable point a of 2 is the origin of the pen stocker 58. On the other hand, if the result of the determination as to whether or not the sensor 64 has become OPEN is No, the pen stocker 58 is further rotated in the counter rotation direction until the sensor 64 first opens, and this OPEN
The stable point a of the next stepping motor 62 at that time is set as the origin of the pen stocker 58. After this origin detection,
Further, the pen stocker 58 is rotated to count the number of slits 56, and the pen stocker 58 is counted by the count value.
Recognize the type of. In each of the above embodiments, the slit on the pen stocker side is detected by an optical sensor.However, as the type of pen stocker, the detected parts such as color, magnetism, and bar code are used, and sensors corresponding to these are used. Can be used.

〔effect〕

The present invention, as described above, uses one sensor for stocker type,
Since at least two of the three stocker presences and the stocker home position are recognized, the number of sensors can be reduced, and the cost can be reduced.

[Brief description of drawings]

1 is a front view, FIG. 2 is a plan view, FIG. 3 is a plan view, FIG. 4 is a flowchart, and FIG. 5 is a front view.
FIG. 6 is a side view, FIG. 7 is a block diagram, FIG. 8 is an external view of another embodiment, and FIG. 9 is a diagram. 2 ... Aircraft, 4 ... Y rail, 6 ... Y motor, 8 ...
Pen head, 10 ... Platen, 12 ... Drawing roller,
14 ... Drive roller, 18 ... Pressure roller, 20 ... Paper, 22 ... Controller, 24 ... Solenoid, 26
…… Pen holder, 28 …… Writing implements, 30 …… Box,
32 ... Stepping motor, 34 ... Mounting board, 36 ...
… Pen stocker, 38, 40… Protrusion, 42… Board, 4
4 ... Cylindrical body, 46 ... Slit, 48 ... U-shaped body,
50 ... Light receiving element, 52 ... Light emitting element, 54 ... Sensor, 56 ... Slit, 58 ... Pen stocker, 60 ...
… Cylindrical part, 62 …… Stepping motor, 64 …… Sensor

Claims (3)

[Claims] 1. A method for detecting the origin, type, and presence / absence of a rotary pen stocker having a plurality of pen holders on its outer periphery, which is detachably connectable to a motor, wherein a type display detected portion is provided on a circumferential wall of the pen stocker. One sensor for the detected portion is provided at a position where the detected portion can be detected on the non-rotating side, and the sensor can detect the detected portion when the motor is rotated in a predetermined direction. Whether the pen stocker is present or not is detected, the type of the detected portion is detected by the sensor to recognize the type of the pen stocker, and the sensor detects the proper position of the detected portion. The method of recognizing a pen stocker is characterized in that is the origin of the pen stocker. 2. A method of detecting the origin of a rotary pen stocker having a plurality of pen holders on its outer peripheral portion, which is detachably connectable to a motor, and the presence or absence of the pen stocker, wherein a detected portion is provided on a circumferential wall of the pen stocker. One sensor for the detected portion is provided at a position where the detected portion can be detected on the non-rotating side, and the presence or absence of the pen stocker is recognized by whether the sensor can detect the pen stocker. A method for recognizing a pen stocker, which is characterized by detecting an appropriate position of a detected part and using the detected position as an origin of the pen stocker. 3. A method for detecting the origin and type of a rotary pen stocker, which has a plurality of pen holders on its outer periphery and is detachably connectable to a motor, wherein a type display detected portion is provided on a circumferential wall of the pen stocker. , One sensor for the detected portion is provided at a position where the detected portion can be detected on the non-rotating side, and when the motor is rotated in a predetermined direction,
The sensor detects the type of the detected portion to recognize the type of the pen stocker, and the sensor detects the proper position of the detected portion, and the detected position is used as the origin of the pen stocker. Pen stocker recognition method.