JPH0822639B2 - Paper feed method for paper driven automatic drafting machine - Google Patents

Description

The present invention relates to a paper feeding method for a paper driven automatic drafting machine.

[Prior Art] In a paper-driven automatic drafting machine, a device for detecting the tilt of the paper and correcting the tilt before printing is disclosed in Japanese Examined Patent Publication 60
-54609 is disclosed.

[Problems to be solved by the invention]

However, even if the inclination of the paper is corrected before printing, when the operation moves to the printing operation, the grip of the paper by the driving roller and the pressure roller becomes unstable, so the paper is misaligned with respect to the roller, and There was a defect that caused misalignment.

The present invention aims to eliminate the above defects.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention feeds a sheet of a sheet guide plate in a predetermined direction by a driving roller and a pressure roller, and feeds a pen head in a direction perpendicular to the feeding direction of the sheet to feed the sheet to a predetermined direction. In the paper drive type automatic drafting machine configured to perform drawing, the size of the paper is detected before shifting to the drawing operation, and thereafter, the paper is reciprocally moved several times in the forward and reverse directions by the drive of the drive roller, Groove traces of the roller are formed on both sides of the paper over substantially the entire length in the longitudinal direction.

〔Example〕

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

In FIGS. 1 and 2, reference numeral 2 denotes a drive roller rotatably supported by the main body (not shown) of the sheet drive type automatic drafting machine, and the roller 2 is linked to the X motor.

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 origin side pressure roller 10 is rotatably fitted to the end of the shaft body 6 in a non-movable state in the longitudinal direction of the shaft. The shaft body 6 is supported by pressure arms 12 arranged at both ends thereof,
The pressure arm 12 is rotatably supported on the main body about a shaft 14, and the tension force of a spring 16 causes the pressure arm 12 to rotate, as shown in FIG.
It is biased counterclockwise.

Reference numeral 18 denotes a Y rail fixed to the main body, and a pen head 20 is attached to the Y rail so that the pen head 20 can move along the Y rail 18 by driving the Y motor.

The pen head 20 is provided with a writing tool 26 which is controlled to be moved up and down by a solenoid built in the pen head 20.

Reference numeral 28 is a paper guide plate made of a platen, and the drawing roller 46 and the drive roller 2 are arranged in the notch of the paper guide plate.

Reference numeral 40 denotes a detection unit composed of a reflection type sensor, which is for detecting the surface of the sheet, and is attached to the pen head 20 or a member interlocking with the pen head 20.

The X motor, Y motor, solenoid and detector 40 are
It is connected to a controller consisting of a computer.

 Next, the operation of this embodiment will be described.

First, the shaft body 6 is lifted against the force of the spring 16, and the paper 44 is set on the winding of the drive roller 2 and the pressure roller 8.

At this time, the left end of the paper 44 is aligned with the paper guide (not shown) protruding to the left end of the guide plate 28. Then paper 44
The pressure roller 8 is moved and adjusted along the shaft body 6 according to the width of the pressure roller 8 so that the pressure roller 8 on the movable side is located at the right end of the paper 44.

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 the paper
The drive roller 2 and the pressure roller are located near both ends in the width direction of 44.
It is firmly sandwiched between 8 and 10.

Next, move the pen head 20 along the Y rail 18,
The detection unit 40 detects the edge of the paper 44 in the width direction,
The controller detects the lateral size of the paper in block 1 as shown in FIG.

Next, in block 2, the paper 44 is reciprocally moved in the feed direction, and the controller detects the length of the paper 44 in the longitudinal direction based on the output of the detection unit 40.

Next, in block 3, the controller drives the drive roller 2 so that the entire area of the paper 44 in the longitudinal direction passes through the drive roller 2.
4, the paper 44 is reciprocated several times to form traces of roller grooves on both sides of the paper by the drive roller 2 and the pressure roller 8.

After the above operation is completed, the controller shifts to the drawing operation.

In the drawing operation, the controller drives the X motor to rotate the driving roller 2 in the forward and reverse directions, and the drawing roller 46 is rotated in the same direction in cooperation with the driving roller 2.

Furthermore, drive the Y motor to move the pen head 20 to the Y rail.
Moving along 18, the solenoid is driven to bring the writing instrument 26 into contact with or away from the paper 44 on the imaging roller 46.

By the above operation, a predetermined pattern is formed on the paper 44 on the guide plate 28.

〔effect〕

As described above, according to the present invention, since the groove traces of the rollers are formed on the paper before the image formation, the drive roller and the pressure roller are fitted in the groove traces during the image formation, and the deviation of the paper from the rollers is prevented. , The paper is firmly gripped by the rollers so that it does not shift, and there is an effect that high-precision printing can be performed.

[Brief description of drawings]

1 is a front view, FIG. 2 is a side view, FIG. 3 is a flowchart, and FIG. 4 is an explanatory view. 2 ... Drive roller, 6 ... Shaft, 8,10 ... Pressure roller,
12 ... Pressure arm, 16 ... Spring, 18 ... Y rail, 20 ...
… Pen head, 26 …… Writing tool, 40 …… Detector, 44 …… Paper,

Claims (1)

[Claims] 1. A paper guide plate-shaped paper is fed in a predetermined direction by a driving roller and a pressure roller, and a pen head is fed in a direction perpendicular to the feeding direction of the paper to perform a predetermined drawing on the paper. In the paper-driven automatic drafting machine, the size of the paper is detected before shifting to the drawing operation, and then the paper is reciprocated several times in the forward and reverse directions by the driving of the drive roller, and the paper is moved to both sides of the paper. A paper feeding method characterized in that groove marks of the roller are formed over substantially the entire length in the longitudinal direction.