JPH03112694A - Lead powder removal in paper-driving type automatic drafting machine - Google Patents

Abstract

PURPOSE:To prevent a roll paper from becoming dirty with a pencil lead powder by dropping the lead powder from the surface of the paper through causing the paper to hang down from the top surface of a platen in the direction of a floor face after the end of drawing in pencil and through reciprocating the paper forward and backward of a machine. CONSTITUTION:When a paper 20 is set on a platen 2 and the drawing operation of an automatic drafting machine is started, a controller controls the forward and reverse rotation of a driving roller 8 and drawing roller 6, the movement of a pen head 14 along a Y-rail 12 and going up and down of a pencil 18. In this manner, a predetermined drawing is performed in the paper 20 mounted on the platen 2. When drawing is judged to have ended, the driving roller 8 and drawing roller 6 are rotated to move the paper 20 to the front of a machine 4 and to cause the paper 20 to hang down from the top surface of the platen 20 toward a floor face. Within a short range of rotation, the driving roller 8 and drawing roller 6 are rotated in the forward and reverse directions and the paper 20 is moved several times forward and backward of the machine 4 within a short range. Thus, the hanging-down paper 20 moves up and down within a short range to drop a pencil lead powder on the paper 20 to a floor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for dropping lead powder on a pencil drawing paper in a paper-driven automatic drawing machine.

[Conventional technology]

A paper-driven automatic that feeds paper on a platen in the front and back direction of the machine, while sending a pen head in a direction perpendicular to the feeding direction of the paper to draw a predetermined drawing on the paper on the platen with a pencil held by the pen head. Drafting machines are known.

[Problem that the invention seeks to solve]

When drawing with a pencil using the automatic drawing machine described above, pencil lead powder adheres to the paper, but conventionally, one drawing operation is completed with the lead powder still attached to the paper.

Therefore, there is a defect in that the paper is stained with core powder after it is removed from the platen.The present invention aims to eliminate the above-mentioned defect.

[Means to solve problems]

In order to achieve the above object, the present invention feeds the paper on the platen in the longitudinal direction of the machine body, while feeding the pen head in a direction perpendicular to the feeding direction of the paper, so that the pen head holds the paper on the platen. In a paper-driven automatic drafting machine that draws a specified drawing with a pencil, after the pencil drawing is finished, the drawing-finished paper is moved to the front or back of the machine, and the paper is hung from above the platen toward the floor, and in this state it is drawn for a short period of time. The paper is reciprocated in the longitudinal direction of the machine body over a distance, and the core powder is dropped from the paper by the reciprocating movement.

〔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 body 4, and the rollers 6.8 are rotationally driven so that they interlock with each other and rotate in the same direction at approximately the same circumferential speed. It is linked to the device. Reference numeral 10 denotes a presser roller, which is pressed against the drive roller 8 by the elasticity of a spring.

A Y rail 12 is fixedly installed between both sides of the fuselage 4,
A pen head 14 is movably attached along the Y rail 12. A pen holder 16 connected to an elevating mechanism built into the pen head 14 removably holds a pencil 18.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

A paper 20 is placed on the platen 2, and the paper 20 is inserted between the drive roller 8 and the pressure roller 10, and the paper 2o is held between the rollers 8 and 10.

As shown in FIG. 3, both ends of the paper on the platen 2 in the front and rear directions hang down from above the butylan 2 toward the floor surface. After setting the paper 20 on the platen 2 and starting the drawing operation of the automatic drawing machine, the controller of the automatic drawing machine controls the drive roller 8 and the drawing roller 6 to rotate forward and backward in the same direction, and also controls the pen head. 14 along the Y rail 12, and the pencil 18
control the elevation. As a result, the paper 20 on platen 2
As shown in FIG. 2A, the pen head 14 is sent in the front and back direction of the machine body 4, and the pen head 14 is sent in a direction perpendicular to the feeding direction of the paper 20 to execute a predetermined drawing on the paper 20 on the platen 2. After completion of the 0 drawing, the controller enters the core powder removal program from label 1 in FIG. 1 by data sent from the host computer to the controller or by the operator's keyboard operation on the controller.

In decision block 2, the CPU of the controller determines whether there was any pencil drawing in the previous drawing operation.

This is because the pen head 14 can exchange writing instruments with the pen stocker (not shown) provided on the body 4 side, and when the previous drawing was done with a ballpoint pen, hollow pen, ceramic pen, etc. This is because there is. If an affirmative determination is made in determination block 2, the controller then determines in determination block 3 whether or not the drawing is finished or the transfer of drawing data is finished. If the answer is yes, then the process moves to block 4, where the drive roller 8 and drawing roller 6 are rotated to move the paper 2o to the front (or the back) of the machine body 4, as shown in FIG. 2B. , most of the paper 20 is made to hang down from above the platen 2 to the floor surface. Next, the controller moves to block 5, rotates the drive roller 8 and drawing roller 6 forward and backward within a short rotation range, and moves the paper 20 in the front and back direction of the machine body 4 several times within a short range. As a result, the paper 2o that has been hanging down for a long time from the front of the machine body 4 moves up and down in a short range as shown in FIG. 2C, causing the core powder on the paper 2o to fall to the floor. FIG. 4 shows another embodiment, in which a fan 22 is provided on the back side of the machine body 4 of a paper-driven automatic drafting machine, the fan outlet is directed toward the platen 2 side, and the fan 22 is installed while moving the paper 2o. This is to drop the core powder.

〔effect〕

Since the present invention is configured as described above, it is possible to automatically drop the core powder adhering to the paper by drawing with a pencil. Therefore, in the case of cut paper, it is possible to prevent the paper from being stained by the core powder, and when using roll paper, even if the roll paper is wound up, the roll paper can be prevented from being stained by the core powder. There are effects that can be prevented.

[Brief explanation of drawings]

FIG. 1 is a flowchart, FIG. 2 is an explanatory diagram, FIG. 3 is a side view, and FIG. 4 is an external view showing another embodiment. 2... Platen, 4... Machine body, 6... Printing roller, 8... Drive roller, 10... Presser roller, 12...
...Y rail, 14...pen head, 16...pen holder 18...pencil, 20...paper, 22...
·fan.

Claims (1)

[Claims] (1) While feeding the paper on the platen in the front and back direction of the machine,
In a paper-driven automatic drafting machine that moves a pen head in a direction perpendicular to the feeding direction of the paper and draws a predetermined drawing on the paper on the platen with a pencil held by the pen head, after the pencil drawing is completed, the drawing completed paper is removed. Move to the front or rear side of the machine, hang the paper from above the platen toward the floor, and in this state, reciprocate the paper in the front and back direction of the machine over a short distance, and the core powder will fall from the top of the paper by the reciprocating movement. A method for removing core powder, characterized by: