JPH07257093A - Apparatus for preventing wave motion of paper in paper-driving type plotter - Google Patents

Abstract

PURPOSE:To prevent wave motion of paper in drawing with a paper driving type plotter. CONSTITUTION:In a drawing operation, paper, namely, a recording medium is driven at high speed on a paper guide 2 in the front and rear direction of a plotter main body 6 by means of a driving roller 10 and pressing roller 12. Provided in the lower side in the front and rear of the paper guide 2 are elastic and pliable films 16, 18 having its upper and lower peripheries fixed to the paper guide 2 and plotter main body 6. The portion of paper hanging down at the front and rear of the paper guide 2 comes in contact with the curved projection surfaces 16a, 18a of the films 16, 18 while it is driven in both directions during the drawing operation, so that a wave motion of the paper is absorbed by the curved projection surfaces 16a, 18a. Such wave motion of paper can also be absorbed by the use of a wave motion preventive board urged in the raised direction by an elastic ring or spring instead of the films 16, 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet wave preventing device for a sheet drive type plotter.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 62-196596 discloses that
A plotter is disclosed that hangs a chain below a paper guide and absorbs the wave of the paper by this chain. Japanese Unexamined Patent Publication No. 63-231999 discloses a wave isolator that supports a wave isolator that absorbs the wave of paper by a cantilever type before and after the plotter. Actual Kaihei 1-138795
The publication discloses a plotter that hangs a sheet below the platen and absorbs the wave motion of the sheet by this sheet. Japanese Unexamined Utility Model Publication No. 1-171696 discloses a plotter in which a braking plate is provided below a platen to prevent the paper from violating, that is, wave motion of the paper. JP-A-2-137
Japanese Unexamined Patent Publication No. 982 discloses a plotter in which a chain or sheet paper sneak prevention member is provided before and after the plotter.

[0003]

In the case of preventing the wave motion of the paper by the chain, the contact surface between the chain and the paper is small, and a sufficient wave motion preventing effect cannot be obtained. Further, if the paper is curled, only the leading end of the paper comes into contact with the chain, and in this case also, a sufficient anti-wave effect cannot be obtained. Further, in the case of using the sheet or the braking plate, when the paper is curled, these come into contact only with the leading edge of the paper, so that a sufficient wave preventing effect cannot be obtained. Further, the cantilever type wave isolator deteriorates the elasticity of the sheet constituting the wave isolator after a long period of use, and the contact force between the sheet and the paper is reduced,
This also has a problem that a sufficient anti-wave effect cannot be obtained. The present invention aims to solve the above problems.

[0004]

[Means for solving problems]

(1) To achieve the above object, according to the present invention, a recording medium on a paper guide fixed to a plotter body is held by a drive roller and a pressure roller, and the recording medium is rotated by forward and reverse rotation of the drive roller. Is sent in the front-back direction on the paper guide, while the pen is sent across the recording medium,
In a paper-driven plotter adapted to record on the recording medium, the upper and lower edges of a flexible film are fixed to the plotter so that a projecting curved surface is formed at an intermediate portion of the film. The projecting curved surface is arranged at a position in contact with the back surface of the portion of the recording medium hanging from the paper guide. (2) In order to achieve the above object, according to the present invention, a recording medium on a paper guide fixed to a plotter body is held by a drive roller and a pressure roller, and the recording medium is rotated by forward and reverse rotation of the drive roller. Is sent in the front-back direction on the paper guide, while the pen is sent across the recording medium,
In a paper-driven plotter adapted to record on the recording medium, a plurality of rings made of an elastic material are attached to the plotter, and the protrusions of the rings are brought into contact with the back surface of the portion of the recording medium hanging from the paper guide. It is arranged at the position where (3) In order to achieve the above object, according to the present invention, a recording medium on a paper guide fixed to a plotter body is held by a driving roller and a pressure roller, and the recording medium is rotated by forward and reverse rotations of the driving roller. Is sent in the front-back direction on the paper guide, while the pen is sent across the recording medium,
In a sheet drive type plotter adapted to record on the recording medium, a wave preventive plate biased in a rising direction by a spring is swingably supported on the plotter, and a surface of the wave preventive plate is attached to the recording medium. It is arranged at a position where it comes into contact with the back surface of the portion hanging from the paper guide.

[0005]

[Operation] When drawing, the protruding surface of the film, the protruding portion of the ring,
Also, the surface of the wave prevention plate effectively absorbs the wave of the recording medium by elastic contact with the surface of the recording medium.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. 1 and 3, 2
Is a paper guide for a paper drive type plotter, and is fixed to the plotter body 6 supported by the leg 4. The surface of the paper guide 2 is provided with a platen that is substantially horizontal to the floor surface and a curved plate that is bent downward at the front and rear portions of the plotter body 6.

At the time of drawing, the recording medium 8 such as the paper on the paper guide 2 is held between the drive roller 10 and the pressure roller 12, and the forward and reverse rotations of the drive roller 10 cause the paper guide 2 to move on the paper guide 2 in FIG. It is driven in the left-right direction, that is, in the front-back direction of the plotter. On the other hand, the pen 14 of the drawing head movably attached to the Y rail (not shown) is the drawing roller 16
While the upper portion is in contact with or away from the recording medium 8, the recording medium 8 is moved in a direction that crosses the recording medium 8, that is, in the direction perpendicular to the paper surface of FIG. The drawing data transferred to the controller is drawn or cut.

Reference numerals 16 and 18 denote thin elastic and flexible synthetic resin films whose upper edges are fixed to the front and rear lower surfaces of the paper guide 2 by screws 22, and project at the lower front and rear of the paper guide 2. With the curved surfaces 16a and 18a formed, the lower edges of the films 16 and 18 are fixed to the lower portion of the main body 6 by screws 20. The projecting curved surfaces 16a and 18a of the films 16 and 18 are arranged at positions contacting the recording medium 8 in the drawing.

The films 16 and 18 are not particularly limited to the structure of one film shown in FIG. 1, but three or a plurality of films 16 and 1 as shown in FIG.
The configuration may be divided into eight. In the above-described structure, the back surface of the recording medium 8 that hangs down from the front and rear of the paper guide 2 and is driven back and forth along the paper guide 2 at high speed contacts the projecting curved surfaces 16a and 18a of the films 16 and 18.

Projecting curved surfaces 16a, 18 of the films 16, 18
a absorbs the wave motion of the portion of the recording medium 8 hanging from the paper guide 2 by elastic contact with the back surface of the recording medium 8, and the wave motion of the hanging portion of the recording medium 8, that is, the paper disturbance, It does not reach the vicinity of the pen 14 and the drive roller 10. Next, another embodiment will be described with reference to FIGS.

Reference numeral 24 is a ring made of a substantially C-shaped elastic metal rod.
Are vertically inserted into a pair of upper and lower holes of the mounting body 26 fixed before and after. The ring 26 is not limited to the round shape, but may be a rectangular shape.

The protruding portion of each ring 24 is formed by the main body 6
It is arranged so as to come into contact with the portion of the recording medium 8 that hangs from the paper guide 2 in the lower front and rear. The other structure of the plotter is the same as that of the first embodiment shown in FIG. In the above configuration, the recording medium 8 is
Due to the elastic contact with the curved portion of the ring 24, the wave phenomenon is absorbed, and the occurrence of paper rampage is prevented.

Next, another embodiment will be described with reference to FIGS. 6 and 7. 28 is a pen 1 under the front and rear of the paper guide 2.
4 is a support shaft arranged in parallel to the moving direction of 4, that is, the Y-axis direction, and the upper part of the wave prevention plate 30 such as a resin molded product is rotatably and slidably fitted to these.

The wave preventing plate 30 is provided for each support shaft 28.
A single piece or a plurality of pieces are attached and each is urged by a spring 32 in a direction projecting in the front-back direction of the main body 6. The urging force of the spring 32 against the wave preventing plate 30 is strong enough to rotate the wave preventing plate 30 in the direction opposite to the urging direction of the spring 32 when the pressing force of the recording medium 8 acts on the wave preventing plate 30. Is set to

The other structure of the plotter is the same as that of the plotter shown in the first embodiment. In the above configuration, during drawing, the surface 30a of the wave preventing plate 30 elastically contacts the recording medium 8 by the biasing force of the spring 32, thereby absorbing the wave of the recording medium 8 and causing the wave to move to the drawing. Prevent propagation.

[0016]

[Effect] Since the present invention is configured as described above, the following effects are present. (1) Since the wave propagation prevention tool is configured by fixing the upper and lower edges of the film, it is superior in strength and durability compared to the cantilever type, and moreover, sufficient strength and durability can be obtained even if a thin film is used. You can (2) Since the wave propagation preventing device is composed of a plurality of rings, the position and number of the rings can be changed according to the paper quality of the recording medium, and the vibration of the recording medium can be effectively prevented. (3) Since the wave prevention plate is composed of a plate-shaped rigid body,
The strength can be improved and the durability can be increased.

[Brief description of drawings]

FIG. 1 is an external view of a plotter showing a first embodiment of the present invention.

FIG. 2 is an external view of a plotter showing a second embodiment of the present invention.

FIG. 3 is a side view illustrating the first embodiment of the present invention.

FIG. 4 is an external view of a plotter showing a third embodiment of the present invention.

FIG. 5 is an explanatory side view showing a third embodiment of the present invention.

FIG. 6 is an external view of a wave prevention plate showing a fourth embodiment of the present invention.

FIG. 7 is an explanatory side view showing the fourth embodiment of the present invention.

[Explanation of symbols]

 2 Paper Guide 4 Leg 6 Plotter Main Body 8 Recording Medium 10 Drive Roller 12 Pressure Roller 14 Pen 16 Film 18 Film 20 Screw 22 Screw 24 Ring 26 Mounting Body 28 Spindle 30 Wave Prevention Plate 32 Spring

Claims (4)

[Claims] 1. A recording medium on a paper guide fixed to a plotter body is sandwiched between a drive roller and a pressure roller, and the recording medium is rotated forward and backward on the paper guide in the front-rear direction. On the other hand, in a paper-driven plotter configured to send a pen across the recording medium to record on the recording medium, the plotter is provided with an upper edge portion and a lower edge portion of an elastic film. The film is fixed so that a protruding curved surface is formed at an intermediate portion of the film, and the protruding curved surface is arranged at a position in contact with a back surface of a portion of the recording medium hanging from the paper guide. apparatus. 2. A recording medium on a paper guide fixed to a plotter body is held by a drive roller and a pressure roller, and the recording medium is rotated in the forward and backward directions on the paper guide by forward and reverse rotation of the drive roller. On the other hand, in a paper drive type plotter configured to send a pen in a direction traversing the recording medium to record on the recording medium, a plurality of rings made of an elastic body are attached to the plotter, and a protruding portion of the ring is attached. A sheet wave preventing device, which is arranged at a position in contact with a back surface of a portion of the recording medium that hangs down from the sheet guide. 3. The sheet wave preventing device for a sheet drive type plotter according to claim 2, wherein the ring is detachable from the plotter. 4. A recording medium on a paper guide fixed to a plotter body is sandwiched between a driving roller and a pressure roller, and the recording medium is rotated in the forward and backward directions on the paper guide by forward and reverse rotation of the driving roller. In a paper-driven plotter in which a pen is fed across the recording medium to record on the recording medium, the wave prevention plate urged by the spring in the rising direction is rocked on the plotter. A sheet wave prevention device for a sheet drive type plotter, which is freely supported and is arranged such that a front surface of the wave prevention plate comes into contact with a back surface of a portion of the recording medium that is hung from the sheet guide.