JP2627527B2 - Position detecting apparatus and method in paper-driven automatic drafting machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and a position detecting method for detecting a position such as a drawing origin and a sheet width end in a paper-driven automatic drafting machine.

[Conventional technology]

Conventionally, in this type of apparatus, a mechanical origin sensor is fixed to a fixed left pressure roller, and a paper width sensor that moves together with the pressure roller is provided to a movable right pressure roller. The positions of the mechanical origin and the paper width are detected by the pen head moving at a constant low speed and being detected by respective sensors.

[Problems to be solved by the invention]

In the above-described conventional apparatus, two sensors are required on the mechanical origin detection side and the paper width detection side, and there is a defect that increases the cost. In addition, since the sensor is turned ON / OFF at a certain point, the pen head has to move at a constant low speed in order to prevent erroneous detection in the initial position detection.

An object of the present invention is to eliminate the above defects.

[Means to solve the problem]

In order to achieve the above object, the present invention provides (1) feeding a sheet on a platen in a predetermined direction by a driving roller and a pressure roller, and sending a pen head in a direction perpendicular to the sheet feeding direction to a predetermined direction on the sheet; In a paper-driven automatic drafting machine configured to perform drawing, a detection unit is provided on one of the pen head or a member interlocked with the pen head and the platen side, and a detection target unit is provided on the other, and the detection target unit is provided. (2) While the sheet on the platen is sent in a predetermined direction by a driving roller and a pressure roller, a pen head is sent in a direction perpendicular to the sheet feeding direction to perform a predetermined drawing on the sheet. In a paper-driven automatic drafting machine that is to be performed, a detection unit is provided on the pen head or a member that interlocks with the pen head, and a detection target unit is provided on the platen side at a position facing a movement path of the detection unit, (3) A sheet drive type in which a sheet on a platen is sent in a predetermined direction by a driving roller and a pressure roller, and a pen head is sent in a direction perpendicular to the sheet feeding direction to perform a predetermined drawing on the sheet. In an automatic drafting machine, a detecting unit is provided on one of the pen head or a member interlocked with the pen head and the platen side, and a detected unit is provided in a plurality of other places, and each of the detected units is lengthened according to its position. Change
The length is detected by the detection unit to distinguish a plurality of detected portions.

[Action]

(1) When the detection unit relatively moves toward the detection target at a high speed and the detection unit reaches one end of the detection target, the detection target is elongated even if the detection unit does not operate. Therefore, the facing time between the detecting unit and the detected portion can be long, and the detecting portion always operates until the detecting portion reaches the other end of the detected portion. Therefore, erroneous detection of the detection unit is prevented.

(2) Since the detection unit is provided on the pen head or a member interlocked with the pen head, even when detecting a plurality of positions, the detection unit can move to a plurality of detected units. Can be detected.

(3) The plurality of detected parts are distinguished from other detected parts by their lengths. Accordingly, the controller reliably distinguishes the plurality of positions from measuring the length of the detected portion, and
The position can be reliably detected.

〔Example〕

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

1 and 2, reference numeral 2 denotes a driving roller rotatably supported by a main body (not shown) of a paper-driven automatic drafting machine. The roller 2 is linked to an X motor 4 (see FIG. 6). doing. A shaft 6 is disposed above and parallel to the roller 2, and a pressure roller 8 is rotatably fitted to the shaft 6 movably along the shaft 6. The shaft body 6
An origin-side pressure roller 10 is rotatably fitted to the end of the shaft in a non-movable state in the longitudinal direction of the shaft. The shaft 6 is supported by pressure arms 12 arranged at both ends thereof.
12 is rotatably supported on the main body around a shaft 14,
The spring 16 is biased in the counterclockwise direction in FIG. 2 by the pulling force. Reference numeral 18 denotes a Y rail fixed to the main body, to which the pen head 20 can be moved along the Y rail 18 by driving a Y motor 22. A writing implement 26 that is controlled to move up and down by a solenoid 24 built in the pen head 20 is attached to the pen head 20. Reference numeral 28 denotes a platen, and a groove 30 is formed in the center of the platen along the Y rail 18.
A pair of plates 32 and 34 are slidably disposed on 30. The plate 34 on the fixed pressure roller 10 side includes:
A relatively long reflective seal is stretched, and the detected portion 36 is formed on the plate 34 by the reflective seal. The detected portion 36 is previously positioned at an origin position corresponding to the fixed-side pressure roller 10. Numeral 40 denotes a detection unit composed of a reflection type sensor, which is mounted on the pen head 20 or a member interlocked with the pen head 20 so as to face the groove 30 and face the groove. The X motor 4, Y motor 22, solenoid 24 and detector 40 are connected to a controller 42 composed of a computer, as shown in FIG.

 Next, the operation of the present embodiment will be described.

First, the shaft 6 is lifted against the force of the spring 16, and the paper 44 is set between the drive roller 2 and the pressure roller 8. At this time, the left end of the sheet 44 is aligned with a sheet guide (not shown) projecting from the left end of the platen 28. Next, the pressure roller 8 is moved and adjusted along the shaft body 6 so that the movable pressure roller 8 is located at the right end of the paper 44 in accordance with the width of the paper 44. When the position of the pressure roller 8 is determined, the plate
The sheet 32 is moved along the groove 30, and is set at a position corresponding to the side end of the sheet 44, that is, the position corresponding to the pressure roller 8. The pressure roller 8 and the plate 32 may be linked to each other. When the lifting force on the shaft body 6 is released, the pressure rollers 8 and 10 are elastically contacted with the drive roller 2 by the spring 16, and both ends in the width direction of the paper 44 are connected to the drive roller 2 and the pressure rollers 8 and 10. Is firmly pinched by

Next, the operation of the controller 42 for detecting the drawing origin and the sheet width will be described with reference to the flowchart of FIG.

When the start switch on the operation panel is turned on, the controller 42 starts the origin and sheet width detection operation.
First, the controller 42 determines whether or not the detection unit 40 is turned on in the determination block 1. If Yes, the pen head 20 moves at high speed to the right in FIG. 1 until the detection unit 40 is turned off ( Block 3). If No is determined in the determination block 1, the pen head 20 is moved to the left at a high speed until the detection unit 40 is turned on (Block 2), and the process proceeds to Block 3. next,
The pen head 20 is moved to the left at a low speed until the detection unit 40 is turned on (block 4), and the ON position is stored as P (block 5). Next, the pen head 20 is moved leftward by C for the left direction (block 6). This C is obtained by adding the relatively short length α of approximately 1/5 of the length L1 to the length L1 of the shorter portion to be detected 38. Here, the controller 42 is
It is determined whether or not 40 is on (block 7). If No, block 8 recognizes that point P is the right end of the sheet, that is, point A. Next, the controller 42 moves the pen head 20 to the left at a high speed until the detection unit 40 is turned on (block 9). When the detector 40 reaches the right end of the origin-side detected part 36,
The detection unit 40 is turned on. The controller 42 has a
When 40 is turned on, the pen head 20 is suddenly stopped, and thereafter, the pen head 20 is moved rightward at a high speed until the detection unit 40 is turned off (block 10).

Next, the controller 42 slightly moves leftward at a low speed until the detection unit 40 is turned on (block 11), and determines the point at which the detection unit 40 is turned on as the origin (block 12). The controller 42 calculates the width of the sheet 44 based on the origin and the point A. On the other hand, if Yes is determined in the determination block 7, the point P is determined as the origin (block 13). Then, until the detection unit 40 operates in the order of off, on, and off,
The pen head 20 is moved rightward at a high speed (block 14).
Next, the pen head 20 is slightly moved leftward until the detection unit 40 is turned on, the position where the detection unit 40 is turned on is determined as the point A, and the controller 42 calculates the paper width (block 16). In the drawing operation, the controller 42 drives the X motor to rotate the drive roller 2 forward and backward, and rotates the drawing roller 46 in the same direction in conjunction with the drive roller 2. Further, the Y head 22 is driven to move the pen head 20 to the Y rail 18.
, The solenoid 24 is driven, and the writing implement 26 contacts or separates from the paper 44 on the drawing roller 46. By the above operation, a predetermined pattern is formed on the sheet 44 on the platen 28. The detected parts 36 and 38 are located on the platen side, that is,
It is sufficient that the main body is stationary with respect to the pen head 20, and is not particularly limited to the illustrated mounting locations. In the above-described embodiment, whether the reflection seal is on the origin side or the movable pressure roller side is detected based on the length of the reflection seal. However, as shown in FIG. The position of the seal may be determined.

〔effect〕

Since the present invention is configured as described above, it is possible to speed up the movement of the movable part between the two detected parts, and it is easy to change the origin or the paper width by the movement of the detected parts. There is an effect that the number can be reduced and cost can be reduced.

[Brief description of the drawings]

1 is a front view, FIG. 2 is a side view, FIG. 3 is a sectional view, FIG. 4 is an explanatory view, FIG. 5 is a flowchart, FIG. 6 is a block circuit diagram, and FIG. 7 is another embodiment. FIG. 2 ... Driving roller, 4 ... X motor, 6 ... Shaft body, 8 ... Pressurizing roller, 10 ... Pressing roller, 12 ... Pressing arm, 14 ... Shaft,
16 ... Spring, 18 ... Y rail, 20 ... Pen head, 22 ...
X motor, 24 ... solenoid, 26 ... writing implement, 28 ... platen, 30 ... groove, 32, 34 ... plate, 36, 38 ... detected part, 42
… Controller, 44 …… Paper, 46 …… Drawing roller

Claims (3)

(57) [Claims] A paper sheet on a platen is fed by a driving roller and a pressure roller in a predetermined direction, while a pen head is sent in a direction perpendicular to the paper feeding direction to perform a predetermined drawing on the paper sheet. In a drive-type automatic drafting machine, a detection unit is provided on one of the pen head or a member interlocked with the pen head and the platen side, and a detection target unit is provided on the other,
A position detecting device, wherein the detected portion has a long shape. 2. A sheet on which a sheet on a platen is sent in a predetermined direction by a driving roller and a pressure roller, and a pen head is sent in a direction perpendicular to the sheet feeding direction to perform a predetermined drawing on the sheet. In a drive-type automatic drafting machine, a detection unit is provided on the pen head or a member interlocked with the pen head, and a detected unit is provided on the platen side at a position facing a movement path of the detection unit. . 3. A sheet on which a sheet on a platen is sent in a predetermined direction by a driving roller and a pressure roller, while a pen head is sent in a direction perpendicular to the sheet feeding direction to perform a predetermined drawing on the sheet. In the drive-type automatic drafting machine, a detection unit is provided on one of the pen head or a member interlocking with the pen head and the plaren side, and a detection unit is provided in a plurality of other locations, and each of the detection units is determined by its position. A position detecting method, wherein a plurality of detected parts are distinguished by changing a length and detecting the length by the detecting part.