JPH03112698A - Controlling method for pull-out of machine-glazed paper in paper-driving type automatic drafting machine - Google Patents

Abstract

PURPOSE:To perform carrying a machine-glazed paper with a high accuracy in the case of connection drawing and quickly in the case of normal continuous drawing by automatically changing a paper carrying method according to connection drawing mode and normal continuous drawing mode. CONSTITUTION:A supply part for a machine-glazed paper 24 is set on a platen 2 to start the drawing operation of an automatic drafting machine. When a controller judges drawing data inputted from a host computer 28 to be in a connection drawing mode, the controller drives a motor 30 and rotates a paper supply shaft 20 to supply a predetermined amount of the machine-glazed paper 24 corresponding to one drawing frame from a roll part 24a. Then, a driving roller 8 is rotated to carry one drawing frame of the machine glazed paper 24 in the direction of a paper winding shaft 22. When the sag of the machine-glazed paper 24 on the paper winding shaft 22 side exceeds a predetermined quantity, a motor 32 is driven and the paper is wound by the winding shaft 22 with the remaining predetermined deflection. In the case of a normal continuous drawing mode, the controller turns off a changeover clutch 34 to place the paper supply shaft 20 in a free rotation. The driving roller 8 is rotated to carry the predetermined amount of the machine-glazed paper 24 onto the platen 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling roll paper withdrawal in a paper-driven automatic drafting machine.

[Conventional technology]

There are two conventional methods for pulling out a roll of paper for one drawing frame onto a platen before starting drawing. One is to rotate the paper supply shaft to pull out a predetermined amount of roll paper to loosen it, and then rotate a drive roller to pull out a predetermined amount of roll paper for one drawing frame onto the platen. . In the other method, the paper supply shaft is kept in a free rotation state, and a predetermined amount of rolled paper is pulled out from the roll portion of the paper supply shaft and supplied onto the platen by rotation of a drive roller.

[Problem that the invention seeks to solve]

The former of the above two methods has good roll paper transport accuracy because no tension is applied to the roll paper due to the presence of slack in the roll paper when the roll paper is pulled out. The drawback is that it takes a long time to pull out the paper onto the platen, making it unsuitable for controlling roll paper pull-out in normal continuous printing where high precision is not required for paper pull-out. In addition, the latter of the above two methods takes less time to transport the roll paper, but since tension is generated in the roll paper when the roll paper is pulled out, the roll paper is likely to shift with respect to the drive roller, and the accuracy of the roll paper transport is reduced. bad. Therefore, there was a drawback that it was unsuitable for connecting drawings in which figures between frames had to be joined exactly.

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

[Means to solve problems]

In order to achieve the above object, the present invention extends a predetermined amount of roll paper onto a platen from a roll part of the roll paper held on a paper supply shaft, holds this projected part between a drive roller and a pressure roller, and In a paper-driven automatic drawing machine, in which a drawing part of the roll paper is sent in the longitudinal direction of the machine body by rotation of a roller, and a writing instrument is controlled to move in a direction across the roll paper to draw a predetermined drawing on the roll paper.

When performing continuous drawing in which figures in each drawing frame are connected to each other by drawing in each drawing frame, the paper supply shaft is rotated in the roll paper feeding direction before starting drawing in one drawing frame, and the drive roller and The roll paper between the paper supply shafts is loosened by a predetermined amount for one drawing frame, and then the drive roller is rotated in the paper drawing direction to pull out a predetermined amount of the roll paper for one drawing frame onto the platen, Normally, in the case of continuous printing, before the drawing of one frame starts, the paper supply shaft is set to a free rotation state, and in this state, the drive roller is rotated in the direction of paper withdrawal, so that one frame of paper is drawn from the roll part onto the platen. A predetermined amount of roll paper is pulled out for each drawing frame.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a platen fixed to the body 4 of the paper-driven automatic drafting machine, and a drawing roller 6 is rotatably arranged in a groove fixed in the width direction of the platen, and a drawing roller 6 is arranged adjacent to and parallel to the groove. A drive roller 8 is rotatably arranged in the groove. The rollers 6.8 are rotatably supported by a bracket fixed to the machine body 4, and the rollers 6.8 are driven by an It's linked. 10 is a presser roller, and the drive roller 8
The spring's elasticity makes it press-contact. A Y rail 12 is fixedly installed between both sides of the body 4, and the Y rail 12
A pen head 14 is movably attached along the . The pen holder 16, which is linked to the lifting mechanism built into the pen head 14, is a writing instrument 18 made of an ink pen.
It is removably held. The pen head 14 has Y
It is configured to be controlled to move along the Y rail 12 by driving a motor. A paper supply shaft 20 and a paper winding shaft 22 are rotatably disposed in the machine body 4 in conjunction with motors 30 and 32, respectively. Supported in a removable manner. An electromagnetic switching clutch 34 is provided in the power transmission path between the motor 30 and the paper supply shaft 2o.

A portion of the roll paper 24 fed out from the roll portion 24a is configured to pass over the platen 2 and be wound around the paper winding shaft 22. Said aircraft 4
has a built-in controller consisting of a computer, and to this controller are connected the XY motor, the elevating mechanism for the pen head 14, the paper supply, the motors 30 and 32 that drive the winding shafts 20 and 22, and the switching clutch 34. The equipment is configured to be controlled by a controller. The aircraft body 4 is provided with an operation panel 26 connected to the controller, and is configured such that various commands or data can be input to the controller from the operation panel 26.

In FIG. 5, 28 is a host computer that supplies drawing data and various drawing commands to the controller. The body 4 is provided with a known rotary writing instrument stocker (not shown) that holds a plurality of writing instruments, and a pen holder 16 of the pen head 14 is inserted between any one of the plurality of pen holders of the stocker and the pen holder 16 of the pen head 14. It is configured so that writing instruments can be exchanged automatically. The configuration of this automatic writing instrument exchange is well known and is not the gist of the present invention, so its illustration and description will be omitted.

Next, the operation of this embodiment will be explained in detail with reference to the flowchart shown in FIG. 3 and the explanatory diagrams shown in FIGS. 1 and 2.

When drawing, first place roll paper 2 on platen 2.
The protruding portion of the roll paper 24 is placed between the drive roller 8 and the pressure roller 10, and the roll paper 24 is held between the rollers 8 and 10. After setting the protruding part of the roll paper 24 on the platen 2,
Start the drawing operation of the automatic drawing machine (label 1 in Figure 1).

Next, in judgment block 2, the controller of the automatic drawing machine judges whether the drawing data input from the host computer 28 is in a continuous drawing mode.

Continuous drawing refers to a mode in which each drawing frame of drawing data forms a continuous figure, and a mode in which each drawing frame is independent and the figures of each drawing frame are not connected to each other is usually referred to as continuous drawing mode6 Judgment block 2 If it is determined to be positive, the controller will.

Drive the motor 30, rotate the paper supply shaft 2o, and
As shown in FIG.
)0 Next, the controller rotates the drive roller 8 to convey the roll paper 24 in the direction of the take-up shaft 22 by a predetermined amount (that is, one drawing frame) as shown in FIG. ), as described above, the roll paper 24 is rolled out by a predetermined amount from the roll portion 24a in the process shown in FIG. 1B.

A roll paper 24 hangs below the paper supply shaft 20. Therefore, the drive roller 8 moves the roll paper 24 as shown in FIG.
When the roll paper 24 is pulled out onto the platen 2 by a predetermined amount in the direction shown in FIG. , the roll paper 24 is wound around the winding shaft 22 with a predetermined slack. Incidentally, if a negative determination is made in determination block 2, that is, in the case of the normal continuous drawing mode, the controller disengages the switching clutch 34 and allows the paper supply shaft 20 to rotate freely (block 6).
6. Next, the controller rotates the drive roller 8 in block 4 to convey the roll paper 24 by a predetermined amount onto the platen 2, as shown in FIG. 2B. At this time, as the roll paper 24 is transported, the paper supply shaft 20 is pulled by the roll paper 24 and rotates, and the paper supply shaft 20 and the roll part 2
Tension is applied due to the inertia of 4a. This tension may cause the roll paper 24 to shift slightly with respect to the drive roller 8. When the controller completes the process of block 4, it enters the 1-drawing start mode from label 5. When the controller shifts to the one drawing start mode, it controls the drive roller 8 and the drawing roller 6 to rotate forward and backward in the same direction, moves the pen head 14 along the Y rail 12, and controls the writing instrument 18 to move up and down. As a result, the protruding portion of the roll paper 24 on the platen 2 is fed in the front-back direction of the machine body 4, and the pen head 14 is fed in a direction perpendicular to the feeding direction of the protruding portion of the roll paper 24, and the pen head 14 is fed onto the platen 2. A predetermined number 1 is attached to the protruding portion of the roll paper 24.
Drawing of the drawing frame is executed.

〔effect〕

As described above, the present invention automatically switches the paper conveyance method between the continuous drawing mode and the normal continuous drawing mode, so that the roll paper can be transferred with high precision in the case of continuous drawing and quickly in the case of normal continuous drawing. There is an advantage that transportation can be carried out.

[Brief explanation of drawings]

FIG. 1 is an explanatory drawing, FIG. 2 is an explanatory drawing, FIG. 3 is a flowchart, FIG. 4 is an explanatory external view, FIG. 5 is an external view, and FIG. 6 is an explanatory side view. 2... Platen, 4... Machine body, 6... Printing roller, 8... Drive roller, 10... Presser roller, 12...
...Y rail, 14...pen head, 16...pen holder 18...writing instrument, 20...paper supply shaft,
22... Paper winding shaft, 24... Roll paper, 26
...Operation panel, 30.32...Motor, 34...
・Switching clutch.

Claims (1)

[Claims] (1) A predetermined amount of rolled paper is fed out onto a platen from the rolled portion of the rolled paper held on the paper supply shaft, this drawn out portion is held between a drive roller and a pressure roller, and the rolled paper is fed out by rotation of the drive roller. In a paper-driven automatic drawing machine, a writing instrument is moved in the direction across the roll of paper while the paper is fed in the front and back direction of the machine, and a prescribed drawing is drawn on the roll of paper. When performing continuous drawing in which frames are connected to each other by drawing each frame, the paper supply shaft is rotated in the roll paper feeding direction before the drawing of one drawing frame starts, and the roll paper between the drive roller and the paper supply shaft is rotated. The roll paper is loosened by a predetermined amount for one drawing frame, and then the drive roller is rotated in the paper drawing direction to pull out a predetermined amount of roll paper for one drawing frame onto the platen. Before drawing one frame, the paper supply shaft is set to a free rotation state, and in this state, the drive roller is rotated in the paper pulling direction, and a predetermined amount of roll for one drawing frame is transferred from the roll part of the roll paper onto the platen. A roll paper drawer control method characterized in that the paper is pulled out.