JPH03173697A - Paper feeding apparatus of automatic drafting machine - Google Patents

Abstract

PURPOSE:To prevent the levitation of paper between a writing utensil and a pinch roller even when the writing pressure to the paper is raised by receiving writing pressure by the surface of a drawing roller and rotationally driving the drawing roller and the paper driving roller constituting the pinch roller at the almost same peripheral speed in the same rotary direction in mutually synchronous relationship. CONSTITUTION:The abutment parts of drive rollers 70, 72 and pressure rollers 48, 50 are arranged within the opposed space part of guide plates 54, 56 and the moving route of a writing utensil 32 is formed directly above the opposed space part and a drawing roller 76 along a longitudinal direction and a shaft body is fixed to one end of the drawing roller 76 on the same axis and the output shaft of a motor 78 is connected to the shaft body. When the writing utensil 32 falls, the leading end thereof comes into contact with the paper 28 on the drawing roller 76 under predetermined pressure and the drawing roller 76 is rotationally driven in the same direction as the feed direction of the paper 28 at the same peripheral speed as the moving speed of the paper 28 while writing pressure is received by the surface of the drawing roller 75. As a result, the paper 28 is not levitated between the writing utensil 32 and the pinch roller consisting of the drive rollers 70, 72 and the pressure rollers 48, 50.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed device in a pinch roller type automatic paper feed drafting machine.

As shown in FIG. 2, the conventional pinch roller type paper feeding device pinches the paper with a pinch roller consisting of a drive roller 2 and a pressure roller 4, and sends the paper 6 in the direction of the X coordinate axis by the rotation of the drive roller 2. , a writing instrument 10 is sent in the direction of the Y coordinate axis on the guide plate 8, and a predetermined drawing is performed on the paper on the guide plate 8.

However, when the paper 6 is sent in the +X direction by the pinch roller while the writing instrument 10 is in contact with the paper 6 on the guide plate 8 with a predetermined writing pressure, the paper 6 is moved by the writing pressure of the writing instrument 10. A blocking force is generated against the paper 6, and the portion 6a of the paper 6 between the writing instrument 1O and the pinch roller is lifted up as shown in the figure. When the paper 6 rises, the writing instrument 1o gets caught on the floating portion 6a of the paper 6, causing the paper 6 to be torn or a drawing error to occur.

An object of the present invention is to prevent paper from floating between a writing instrument and a pinch roller.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 12 denotes a shaft body rotatably supported by the fuselage (not shown), a shaft body is concentrically fixed to one end of the shaft body, and the output shaft of the X motor 74 is attached to the shaft body. It is connected. Drive rollers 70, 72 are fixedly installed at both ends of the shaft I2. A Y cursor 28 is movably connected to a Y rail (not shown) fixed to the machine body in a direction perpendicular to the feeding direction of the paper 28, and a drawing head 3o is connected to the Y cursor 28. There is.

A writing instrument 32 is supported on the drawing head 30 in conjunction with a lifting mechanism built into the head 30. 34.3
Reference numeral 6 denotes belt pulleys located at both ends of the Y rail and rotatably supported by the machine body; one belt pulley 3
6 is linked to the Y motor 42 via gears 38, 40. An endless belt 44 is attached to the pulleys 34 and 36.
The belt is passed, and the Y cursor 28 is connected to the belt 44. Reference numerals 48 and 50 designate pressure rollers rotatably supported by the machine body, each linked to a lifting mechanism (not shown), and the rollers 48 and 50 come into elastic contact with the surface of the drive roller 70 and 72 due to the elasticity of a spring. ing. 52
, 54 and 56 are guide plates, which are fixed to the body.

A drawing roller 76 is arranged directly below the opposing space between the guide plates 52 and 54, and the roller 76 is rotatably supported by the machine body. The upper end surface of the drawing roller 76 and the upper surface of the guide plates 52 and 54 near the upper end surface are set at approximately the same height.

The abutting portions of the drive rollers 70, 72 and the pressure rollers 48, 50 are arranged in the opposing spaces between the guide plates 54, 56. Directly above the opposing space between the guide plates 52 and 54 and the drawing roller 76, the space and the roller 7
A moving path for the writing instrument 32 is formed along the longitudinal direction of the writing instrument 6. A shaft is coaxially fixed to one end of the drawing roller 76, and an output shaft of a motor 78 is connected to the shaft.

Next, the operation of this embodiment will be explained.

3 Place the paper 28 on the guide plates 52, 54, 56, and move the paper 28 between the drive roller 70, 72 and the pressure roller 4.
Inserted between 8 and 50. X motor 18 and motor 7
8 is driven by a controller (not shown), the drive rollers 70 and 72 are rotated, and the paper 28 is moved between the guide plates 52 and 5.
4. Send along the surface of 56 in the direction of the X coordinate axis. on the other hand,
The drawing roller 76 rotates synchronously with the drive roller 70.72 in the same direction and at the same circumferential speed. On the other hand, the Y motor 42 is driven by the controller, and the belt 44 is connected to the pulley 34,
It rotates between 36 and 36 in the forward and reverse directions. The head 30 moves in the Y direction along the Y rail in conjunction with the rotation of the belt 44.

The controller controls the writing instrument 32 to move up and down, and when the writing instrument 32 descends, the tip of the writing instrument 32 contacts the paper 28 on the drawing roller 76 with a predetermined pressure. The pressure of the writing instrument 32 against the paper 28 is received by the surface of the drawing roller 76.

With the writing instrument 32 in contact with the paper 28 with a predetermined pressure,
Even if the paper 28 is sent in the -X direction by the drive rollers 70 and 72, at this time the drawing aperture roller 76 rotates at the same peripheral speed as the moving speed of the paper 28 and in the same direction as the feeding direction of the paper 28. For driving, a writing instrument 32 and a drive roller 70.
The paper 28 is not lifted up between the pinch roller 72 and the pressure rollers 48 and 50.

As described above, the present invention is configured such that the surface of the drawing roller receives the writing pressure of the writing instrument against the paper, and the drawing roller and the paper driving roller constituting the pinch roller are synchronously rotated approximately in the same direction of rotation. Since they are driven to rotate at the same circumferential speed, there is an effect that the paper will not float between the writing instrument and the pinch roller even if the writing pressure of the writing instrument against the paper is increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view, and FIG. 2 is an explanatory diagram of the prior art. 12... Shaft body, 22.24... Drive roller, 28.
... Y Kurtz (le, 30... plotting head, 32...
Writing instrument, 34.36...belt pulley, 42...Y
Motor, 44... Belt, 48.50... Pressure roller, 52, 54.56... Guide plate, 70.72...
Drive roller, 74...X motor, one ta.

Claims (1)

[Claims] (1) While the paper is sent in a predetermined direction by a drive roller and a pressure roller that comes into elastic contact with the paper, a writing instrument is arranged so as to be movable in a direction perpendicular to the feeding direction of the paper, and the writing instrument is brought into contact with the paper. In a paper feeding device for an automatic drawing machine, which draws a predetermined pattern on a paper by the mutual action of the movement of the writing instrument and the movement of the paper in the feeding direction,
A drawing roller is disposed directly below and parallel to the moving path of the writing instrument, the drawing roller is linked to a first drive motor, the drive roller is linked to a second drive motor, and the drawing roller is linked to a first drive motor, 1. A paper feeding device for an automatic drafting machine, characterized in that the driving rotational direction and circumferential speed of the drawing roller are set to be substantially the same as the driving rotational direction and circumferential speed of the driving roller.