JPH0354954Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pinch roller type automatic drafting machine that pinches paper with a drive roller and a pressure roller to feed the paper in a predetermined direction.

In this type of automatic drawing machine, when drawing on paper on a drive roller using a writing instrument, especially a writing instrument with a lead tip, forming an abrasive grain surface on the drive roller will cause the lead core to touch the paper. The adhesive becomes better and you can draw clear lines. In this case, it is desirable that the surface of the abrasive grain be thin and have a high density. However, this fine abrasive surface is not suitable for feeding paper through interaction with a pressure roller. A rough abrasive grain surface is desirable to firmly hold the paper.

Therefore, in the present invention, a fine abrasive grain surface is formed in the pen travel range on the surface of the drive roller, and a rough abrasive grain surface is formed in the contact areas of the pressure roller at both ends of the drive roller, making it suitable for drawing and paper feeding. The object of the present invention is to provide a pinch roller type automatic drafting machine.

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

2 is a cylindrical drive roller, and both ends thereof are rotatably supported by a body (not shown).
A gear 4 is fixed to one center shaft of the roller 2, and the gear 4 meshes with a gear 8 fixed to the output shaft of the X motor 6. At both ends of the roller 2, abrasive grain surfaces 2a, 2a' consisting of a large number of abrasive grains, ie, protruding claws, are formed over a predetermined range.
The abrasive grain surfaces 2a, 2a' are coated with abrasive grains such as ceramics by a known thermal spraying technique. Further, the abrasive grain surfaces 2a, 2a' may be formed by a known electrodeposition technique such that the diamond abrasive grains 10 are covered with a thin layer of nickel 12 on the surface of the roller 2. When the abrasive grain surface is formed on the roller 2 by electrodeposition technique, only one layer of diamond abrasive grains 10 is formed on the surface of the roller 2, so the diameter of the roller abrasive grain surfaces 2a and 2a' can be adjusted with high precision. It is possible to set. The abrasive grain surfaces 2a, 2a' are formed roughly to obtain a strong paper gripping force between them and the pressure rollers 16, 18. A thin abrasive grain surface 2b is formed between the abrasive grain surfaces 2a and 2a' at both ends of the drive roller 2 by a known thermal spraying technique or electrodeposition technique. On the abrasive grain surfaces 2a and 2a', relatively large abrasive grains are arranged at a low density so that the paper 14 can be firmly held between the pressure rollers 16 and 18, thereby forming a rough surface. However, the abrasive grain surface 2b is different from the abrasive grain surface 2a.
The structure is such that fine abrasive grains are arranged at a high density to provide optimum drawing resistance to the lead lead of the writing instrument 20, etc. The rubber surfaces of the pressure rollers 16 and 18 are in elastic contact with the rough abrasive grain surfaces 2a and 2a' of the roller 2 due to the elasticity of the spring. Paper guide plates 24 and 26 are provided at both ends of the drive roller 2. 28 is a Y rail installed on the machine body along the longitudinal direction of the drive roller 2;
A Y cursor 30 is movably connected to this via rollers. Belt rollers 32 and 34 are rotatably supported at both ends of the Y rail 28, and an endless belt 3 is mounted between the belt rollers 32 and 34.
6 is crossed. The Y cursor 30 is connected to the belt 36. A gear 38 is fixed to the central axis of the belt roller 34, and the gear 38
8 is a gear 4 fixed to the output shaft of the Y motor 40
It meshes with 2. The Y cursor 30 is fixed to a drawing head 44, and a writing instrument 20 is attached to a pen lift drive device (not shown) built into the head 44.
are connected. The XY motors 6, 40 and the pen lifting/lowering drive device are connected to a controller (not shown) controlled by a computer.

Next, the operation of this embodiment will be explained.

The paper 14 is placed on the guide plates 24, 26, and the pressure rollers 16, 18 are brought into elastic contact with the rough abrasive grain surfaces 2a, 2a' of the drive roller 2 from above both sides of the paper 14.

In the above state, when the X motor 6 is driven, the drive roller 2 rotates, and the paper 14 is moved by a pinch roller mechanism consisting of the rough abrasive surfaces 2a, 2a' of the drive roller 2 and pressure rollers 16, 18. and is sent in a predetermined direction.

On the other hand, by driving the Y motor 40, the drawing head 44 moves along the longitudinal direction of the drive roller 2. The pen tip of the writing instrument 20 comes into elastic contact with the thin abrasive surface 2b of the drive roller 2 from above the paper 14 with a predetermined pressure, and in this state, the XY motors 6, 40
is driven and the paper 14 and drawing head 44 are sent in respective predetermined directions, the writing instrument 20
A predetermined pattern is drawn on the paper 14.

Incidentally, as shown in FIG. 5, a pair of turret boards 50
(The other one is not shown) A plurality of drive rollers 2 of different lengths are rotatably mounted between them, and the turret board 50 is rotated to select a drive roller according to the width of the paper. It may be configured such that the X motor is linked and the pressure roller is positioned on the rough abrasive grain surface at both ends of the drive roller.

As mentioned above, this invention has a rough abrasive grain surface on both ends of the drive roller, so the interaction between this and the pressure roller makes it possible to reliably grip and feed the paper. The running surface of the writing instrument has a thin abrasive grain surface that forms an optimal friction surface as the underside surface of the writing instrument, so that it is possible to draw clearly on the paper.

In addition, since an underlay surface is formed on the drive roller and drawings are drawn on the paper on this surface, paper feeding does not become heavy even when a writing instrument is pressed from above the paper to the underlay surface, and the paper can be fed accurately. There are effects such as being able to do this.

[Brief explanation of the drawing]

Fig. 1 is a schematic external view, Fig. 2 is a side view, Fig. 3 is an external view, and Fig. 4 is a sectional view showing another embodiment.
FIG. 5 is a schematic external view showing another embodiment. 2...Drive roller, 4...Gear, 6...X
Motor, 2a, 2a'... Abrasive grain surface, 16, 18...
...Pressure roller, 24, 26...Guide plate, 28...
...Y rail, 30...Y cursor, 32, 34...
... Belt roller, 36 ... Belt, 38 ... Gear, 40 ... Y motor, 44 ... Drawing head, 5
0...Tallette board.

Claims (1)

[Scope of utility model registration request] A writing instrument in which paper is placed on drive rollers connected to a drive system, the paper is clamped by both ends of the drive rollers and a pressure roller that comes into elastic contact with these, and the writing instrument is movable along the longitudinal direction of the drive rollers. is brought into elastic contact with the surface of a drive roller from above the paper, and a predetermined drawing is performed on the paper on the drive roller by rotation of the drive roller and movement of the writing instrument along the drive roller. A fine abrasive grain surface for underlaying is formed in the writing implement running range of the roller, and an abrasive grain surface for paper feeding that is rougher than the abrasive grain surface is formed at the contact portions of the pressure roller roller at both ends of the drive roller. Features: Pinch roller type automatic drafting machine.