JPH03147850A - Liquid ejection recording device - Google Patents

Abstract

PURPOSE:To recover gas residing in a device rapidly by setting an evaporated liquid portion recovery device which recovers the evaporated ink portion in a gaseous phase during a thermally fixing process. CONSTITUTION:If a recording medium 8 on which liquid ink is splashed freshly passes over a thermally fixing device 10, the low boiling point component of the liquid ink on a recording medium 8 evaporates rapidly and resides in a recording device 11 and then in turn, is released to an area outside the recording device 11. A gas adsorption sheet 13 is arranged as a device to recover an evaporated liquid portion containing a large amount of a solid component which has a strong gas adsorption action, on the upper position of the thermally fixing device 10 on the internal wall 12 of an enclosure 12. A gas evaporated from above the recording medium 8 is adsorbed by the gas adsorptive sheet 15, thus preventing the gas from being released to an area outside the recording device 11. In addition, a silica gel is used for moisture adsorption as an example of an adsorber, and an activated charcoal is used as a preferable adsorber of an organic volatile component.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid jet recording apparatus, and more particularly to a liquid jet recording apparatus having a heat fixing means in a paper discharge section.

[Conventional technology]

Records of printers, copiers, facsimiles, etc. as output devices for office computers, word processors, etc.! ! The device is configured to form an image on a recording medium such as paper based on an image signal, and the recording method is to move the recording head along the recording medium and synchronize with the movement. Serial type recording devices, which record data at a predetermined location, account for a large proportion of the data.

An inkjet recording device is used as one type of recording device, which forms an image by depositing flying ink droplets from an ejection port onto a recording medium. It is positioned as a recording device that can be further developed in the future from the viewpoint of ease of use. Recently, from the perspective of improving throughput, there has been a strong demand to achieve early fixation of liquid ink on recording media. It has become necessary.

[Technical problem B to be solved by the invention] However, when a heat fixing device is used, as shown in FIG. When the dew condenses when it comes into contact with low-temperature components, the liquefied evaporated components contaminate the components, and the components are eroded, resulting in a shortened component life.

Further, if dew condensation occurs near the ejection ports on the face of a print head (not shown) mounted on the carriage 3, there is a possibility that IIL output from the print head will become unstable. Furthermore, if the stagnant gas is released outside the device, some users of the device may perceive it as a PA odor.

An object of the present invention has been made in view of the above-mentioned technical problems, and is to provide a liquid jet recording device that can promptly recover the gas remaining in the device.

[Means to solve the problem]

The present invention provides a liquid jet recording apparatus having a heat fixing means, which is equipped with a liquid volatile matter collection means for collecting evaporated ink generated during heat fixing in a gaseous state. It is something to be collected. This makes it possible to minimize the effects of dew condensation inside the device on the members and the release of retained gas to the outside of the device.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIG. 1 is a perspective view showing the configuration of a paper discharge section of a liquid jet recording apparatus according to the present invention. The apparatus shown in FIG. 1 is a bubble jet type serial printer.

To the record with an ink tank 7 de 4 is mounted on the carriage 5 at 1δ, and! The ridge 5 is slidably stored on a guide shaft 6, and is movable parallel to the platen 7.

With the above configuration, by scanning the RAD 4 in the left-right direction (direction of arrows A and B) to the recording with an ink tank and driving the RAD 4 to the recording, one line of recording is formed. .

On the other hand, by sequentially feeding the recording medium 8 by a feed roller (not shown) between the platen 7 and the recording head 4 with an ink tank as indicated by the arrow C, a plurality of lines of recording are formed on the recording medium 8. be done.

Reference numeral 9 prevents the recording medium 8 from floating from the platen 7;
This is a holding plate that secures a gap between the surface of the recording head 4 and the recording medium 8.

Furthermore, a heat fixing unit 2 is provided at a position adjacent to the platen 7.
310 is disposed, and the heating fixing device IO heats the recording medium 8 conveyed from the platen 7, and heats the recording medium 8.
It is configured to promote evaporation of the ink above and contribute to shortening the fixing time.

In the above configuration, when the recording medium 8 immediately after the liquid ink has landed and adhered passes over the heating window fFR7lQ, the low boiling point components of the liquid ink on the recording medium 8 are rapidly heated by the heat from the heating fixing device IO. Vaporized into Record VI II
It stays inside and is eventually released to the outskirts of the recording device tt.

In this embodiment, as shown in FIG. 2', a heating window on the inner wall of the outer device 2 is used. A sheet 13 (hereinafter referred to as a gas adsorption sheet) as a liquid volatile matter recovery means containing a large amount of solid components having a strong gas adsorption effect is placed at the upper position of O.
The gas adsorbing sheet 13 adsorbs the gas evaporated from above the recording medium 8 and prevents it from being released outside the recording device.As an example of the adsorbent, the evaporated portion of the ink is mostly water. Considering this, it is preferable to use silica gel for moisture adsorption and activated carbon for adsorption of organic volatile components.

3 and 4 show other embodiments of the structure of the body adsorption sheet 13.

In FIG. 3, the gas adsorption sheet 13 located above the heating constant a 2'', 10 is made to have an uneven shape to increase the gas absorption area.

Furthermore, the one shown in FIG. 4 has a +lly structure in which, in addition to the gas adsorption sheet 13 provided along the inner wall of the outer device 2, a large number of gas adsorption sheets 13 are provided at predetermined intervals in the vertical direction. By installing the gas adsorption seams 3 in multiple layers, the gas absorption area is increased.

Further, an embodiment using a gas recovery means different from the above-described embodiment is shown in FIGS. 5 to 7.

FIG. 5 shows a configuration in which a metal plate 14 with high heat dissipation properties is installed non-parallel to the surface of the recording medium 8, covering the upper part of the heat fixing device 10 on the inner wall of the outer device 2.

Further, in the upper part of the heat dissipating gold IOi provisional 14, a vacant space 1 formed by the inner surface of the outer device 2 and the upper surface of the heat dissipating IIL metal plate 14 is provided.
5 is provided. Furthermore, the setting X of the heat dissipating metal plate 14
The position is set at a certain distance from the surface of the recording medium (the surface of the heat fixing 231O) so as not to receive direct thermal energy.

formed by the heat dissipating metal plate 14 and the inner surface of the outer device 2'!
! The air in the chamber 15 is connected to the external device 2 so that it is always in contact with the external air.
It has an air-conducting window 1G on the side of the upper part, so that the heat from the heat dissipating metal plate 14 can be released to the outside at node tB! +%
It is constructed.

Therefore, the surface temperature of the heat dissipating metal plate 14 is always much lower than the vicinity of the heat fixing device 10, and is at a temperature at which vaporized ink components can be easily liquefied.

With the configuration of this embodiment described above, the gas evaporated from above the recording medium 8 is liquefied on the lower surface of the heat dissipating metal 14, and the liquid adhering to the lower surface is removed when the heat dissipating gold MI4 is not flat against the ground. Since it is te, heat dissipation gold 1 due to gravity
Along the lower surface of 7JtFi 14, the heat dissipating metal plate 1
gather at one end of 4.

The collected liquid is absorbed by a moisture absorbing member 17 as a liquid absorbing means disposed at the lower right end of the heat dissipating gold I2!1Fi14.

In contrast to the single heat dissipating metal plate 14 shown in FIG. 5, FIG. 6 shows a structure in which the heat dissipating metal plate 14 is divided into a plurality of rectangular pieces. The heat dissipation effect from the heat dissipating metal plate 14 is further enhanced, and the contact RJn with gas is increased compared to the heat dissipating gold riI4 temporary 14 shown in FIG.

Note that even when the heat dissipating metal plate 14 is divided into a plurality of sheets as shown in FIG. The orientation of the plate 14 is adjusted.

Note that FIG. 7 shows a configuration in which the heat dissipating metal plate 14 shown in FIG. 6 has an increased number of locations where the moisture absorbing members 17 are installed.

Note that in the structure shown in FIGS. 6 and 7, it is possible that some gas may leak out from the gaps between the heat dissipating metal plates 14.
It is preferable to install a gas adsorption sheet on the inner surface of the outer device 2.

〔Effect of the invention〕

As described above, according to the liquid jet recording device according to the present invention,
By having a structure equipped with a liquid volatile matter recovery means that recovers the ink evaporation that occurs during heat fixing in a gaseous state, it is possible to recover the sulfur evaporation from the ink during heat fixing, especially on the recording medium. becomes possible.

Therefore, it is possible to prevent the vaporized ink vapor that is convectionally flowing inside the device for recording the liquid jet a from being released to the outside of the device, and it is also possible to reliably prevent condensation inside the device caused by the vaporized ink vapor. be effective.

This makes it possible to prevent adverse effects on the members due to condensation inside the cylinder, and to provide a highly reliable liquid jet 1-l recording device, which in turn makes it possible to install the liquid jet recording device.
1, it becomes possible to obtain a wider range of material selection for members and a wider range of volatile solvent selection for recording ink.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of a wandering section of a liquid jet recording device according to the present invention, and FIG. 2 is a schematic vertical sectional view showing a main part of an embodiment of the liquid jet recording device according to the present invention. Figures 3 to 7
The figures are schematic vertical sectional views showing the main parts of other embodiments of the liquid jet recording device according to the present invention, and FIG. 8 is a schematic vertical sectional view showing the main parts of an example of a conventional liquid jet recording device. be. The symbols representing the main parts of the drawings will be explained below. 1 and 8. : Recording media 2 and 11 : Recording devices 3 and 5 : Carriage 4 : Recording with ink tank 7 6 Ni guide shaft 7 Nib platen 9 : Paper holding temporary IO : Heating fixing device 12 : Outer device 3 : Gas @ Arrival: Heat dissipation i Raw metal plate: Vacant room: Atmospheric communication window: Moisture absorbing member: Carriage movement direction 2 types: Recording medium movement direction

Claims (9)

[Claims] (1) A liquid jet recording apparatus having a heat fixing means, characterized in that the liquid jet recording apparatus is equipped with a liquid volatile matter collection means for collecting evaporated ink generated during heat fixing in a gaseous state. (2) The liquid jet recording device according to claim 1, characterized in that a gas adsorbent is used as the liquid volatile matter recovery means. (3) The liquid jet recording device according to claim 1, wherein a sheet containing a gas adsorbent is used as the liquid volatile matter recovery means. (4) The liquid jet recording apparatus according to claim 1 or 3, wherein a concavo-convex sheet containing a gas adsorbent is used as the liquid volatile matter recovery means. (5) Claim 1 or 3, characterized in that sheets containing gas adsorbents constituting liquid volatile matter recovery means are installed in multiple layers.
The liquid jet recording device described in . (6) The liquid jet recording apparatus according to claim 1, wherein evaporated ink generated during heat fixing is liquefied and recovered. (7) The liquid jet recording device according to claim 6, wherein a heat dissipating metal plate is used as the liquefaction means. (8) The liquid jet recording device according to claim 7, characterized in that the heat dissipating metal plates are arranged in multiple layers. (9) The liquid jet recording device according to claim 7 or 8, characterized in that a liquid absorbing means is used at one end of the heat dissipating metal plate.