JP2001302012A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed recording paper with high accuracy irrespective of the type of the recording paper. SOLUTION: A recorder comprises a recording head 7 mounted, for dot formation, on a carriage 1 capable of reciprocation in a main scanning direction, and a recording medium feed mechanism 5 for feeding a recording medium in a subsidiary scanning direction. The recording medium feed mechanism 5 comprises an endless belt 10 having an adhesive layer at least over the obverse surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording apparatus for printing a recording medium by a recording head which ejects ink droplets from nozzle openings, and more particularly to a paper transport mechanism.

[0002]

2. Description of the Related Art In recent years, ink jet recording heads have been used for printing high-quality commercial products such as posters by utilizing the high color printing performance of ink jet recording heads. On the other hand, the recording apparatus is configured to arrange a pair of rollers so as to sandwich the upstream side and the downstream side of the moving area of the recording head, and to convey single-leaf recording paper at a predetermined pitch by one of the pair of rollers. I have.

[0003]

However, recording media requiring high-quality printing generally have a large recording paper size and low flexibility as compared with office recording paper, so that a recording medium between rollers is required. There is a problem that the recording paper conveyance accuracy is reduced due to slippage or the like, and printing with intended quality is difficult. The present invention has been made in view of such a problem, and an object of the present invention is to provide a recording apparatus capable of feeding paper with high accuracy regardless of the type of recording paper.

[0004]

According to the present invention, there is provided a recording head mounted on a carriage which reciprocates in a main scanning direction to form dots, and
In a recording apparatus having a recording medium transport mechanism for transporting a recording medium in the sub-scanning direction, the recording medium transport mechanism is constituted by an endless rotating member having at least a suction layer on a surface.

[0005]

The recording medium is held by the rotating member by the suction force to move the printing area, so that there is no slip of the recording medium between the rollers.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a first embodiment of the present invention. FIG. 1 shows an embodiment of the recording apparatus of the present invention.
The recording medium is connected to a motor 3 via a timing belt 2 and guided by a guide member 4 so as to reciprocate in a width direction of a recording sheet conveyed by a recording medium conveying mechanism 5, that is, in a main scanning direction.

On the side of the carriage 1 facing the recording paper, there is provided a recording head 7, in this embodiment an ink jet recording head for discharging ink droplets from nozzle openings.
An ink cartridge 8 for supplying ink to the recording head 7 is detachably provided on the upper surface.

FIG. 2 shows a recording medium transport mechanism 5 characterized by the present invention, in which an endless belt 10 having an adhesive layer on at least the surface thereof is provided with rollers 11 and 12 disposed so as to sandwich a reciprocating region of the carriage 4. A claw member 13 for turning over the recording paper is provided at an end of the recording paper on the discharge side.

As shown in FIG. 3, the endless belt 10 has a pressure-sensitive adhesive layer 10b formed on the surface of a base material 10a with a rubber such as butyl rubber or pressure-sensitive adhesive acryl.
Also, by forming a ridge with a constant pitch, the recording medium can be held during the printing period, and the recording paper is held to such an extent that the claw member 13 can peel off the recording medium without damaging the recording medium. The power has been adjusted.

In this embodiment, when the leading end 20a of the recording paper 20 is pressed against the endless belt 10 of the transport mechanism 5,
The recording paper 20 is fixed to the endless belt 10 by the adhesive force of the adhesive layer 10b (FIG. 4 (I)). Roller 1 in this state
When the recording papers 20 are driven, the recording paper 20 is conveyed to the printing area, and the recording head 7 prints images and characters corresponding to the print data (FIG. 4 (II)).

In this process, since the recording paper 20 is held by the adhesive force of the endless belt 10 and moves in synchronism with the movement of the endless belt, the paper feed caused by slippage during conveyance by the roller pair is performed. No error occurs.

As printing proceeds, the leading end 20a of the recording paper 20
When the recording paper reaches the claw member 13, the recording paper 20 is sequentially peeled off from the endless belt 10 by the claw and discharged to a discharge tray (not shown) (FIG. 4 (III)).

FIG. 5 shows another embodiment of the present invention. A cleaning member 14 such as a sponge capable of absorbing and holding water is provided on a surface of an endless belt by a driving mechanism 15 so as to be able to contact and separate therefrom. ing.

In this embodiment, when the adhesive force of the adhesive layer 10a is reduced by a large amount of printing, the cleaning member 14 is elastically brought into contact with the adhesive layer 10a in a state where water is contained, and the transport mechanism 5 is operated. Then, the adhesive force of the adhesive layer 10a is reduced by the water, and the paper dust attached to the surface is scraped off by the creasing member 14 and removed.

In the above-described embodiment, the recording paper is fixed by adhesive force. However, the adhesive layer is made of a triboelectrically chargeable polymer insulating material. The same effect can be obtained by arranging charging means such as discharging means.

In the above-described embodiment, the adhesive layer is formed as an endless belt. However, the same effect can be obtained even if the area facing the recording head is formed on the surface of a roller having a diameter that can be regarded as a substantially flat part. Play.

Further, in the above-described embodiment, the case of printing with an ink jet recording head has been described. However, a recording apparatus using another type of recording head such as a sublimation recording head, a thermal transfer recording head, a wire impact recording head, and the like. It is clear that the same effect is obtained even if the method is applied.

[0018]

As described above, according to the present invention, a recording head mounted on a carriage reciprocating in the main scanning direction to form dots and a recording medium transport mechanism for transporting a recording medium in the sub scanning direction are provided. Since the recording medium transport mechanism is constituted by an endless rotating member having at least a suction layer on the surface thereof, the recording medium can be held by the rotating member with adhesive force to move the printing area. As a result, the recording medium does not slip between the rollers as in the related art, and the recording paper can be fed with high accuracy regardless of the type of the recording medium.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a recording apparatus of the present invention.

FIG. 2 is a cross-sectional view illustrating an example of a recording sheet transport mechanism of the recording apparatus.

FIG. 3 is a cross-sectional view showing one embodiment of an endless belt constituting a recording paper transport mechanism.

FIGS. 4A to 4C are views showing a paper feeding operation of the recording apparatus.

FIG. 5 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carriage 5 Recording medium conveyance mechanism 7 Recording head 10 Endless belt 13 Claw member

Claims (6)

[Claims] 1. A recording apparatus comprising: a recording head mounted on a carriage that reciprocates in a main scanning direction to form dots; and a recording medium transport mechanism that transports a recording medium in a sub-scanning direction. A recording apparatus in which the mechanism is constituted by an endless rotating member having at least a suction layer on a surface. 2. The recording apparatus according to claim 1, wherein a peeling claw member is disposed on a discharge port side of the recording medium transport mechanism. 3. The recording apparatus according to claim 1, wherein the suction layer is made of an adhesive rubber. 4. The recording apparatus according to claim 1, wherein said adsorption layer is made of a charging material. 5. The recording apparatus according to claim 1, wherein an uneven portion for adjusting a contact area with a recording medium is formed on a surface of the adhesive layer. 6. The recording apparatus according to claim 1, wherein a cleaning member for impregnating with water is provided on the surface of the adsorption layer so as to be able to contact and separate therefrom.