JPS61206678A - Ink jet recorder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of an inkjet recording apparatus, and specifically relates to the structure of an ejection port that guides and discharges recorded paper to the outside.

[Prior art]

An inkjet recording apparatus drives a plurality of orifices (orifice group) provided in a recording head based on a data signal, and records while adhering ink droplets ejected from each orifice to a sheet of paper.

Roll sheets 1 to 1 or cut sheets are used as the paper, and various paper materials such as paper and plastic film are used. This paper is sent to the recording head section by a paper feed roller, and the recorded paper is further guided to the discharge port above the recording head and discharged to the outside.

Further, there are two types of recording methods: a serial type that uses a carriage to perform recording scanning in the direction of the paper, and a line type that uses a recording head that extends in the direction of the paper and performs recording and scanning in the paper feeding direction.

Furthermore, in some models that use roll sheets, the guide member of the discharge port is formed with a cutter, and the paper is cut with a blade at the edge of the paper.

However, since inkjet recording devices apply ink liquid, there is a problem in that when the recorded paper is guided to the discharge port and discharged, the adhered ink, which has not yet dried sufficiently, is crushed by these guide parts, staining the paper. .

Another possible method is to increase the distance from the recording head to the ejection port and allow sufficient drying during that time, but this has the problem of increasing the size of the device and increasing paper waste.

〔the purpose〕

An object of the present invention is to solve such problems in the conventional technology, and to prevent stains on the paper due to rubbing of undried adhering ink by a guide section etc. after recording, regardless of the stiffness of the paper. An object of the present invention is to provide an inkjet recording device equipped with an ejection mechanism.

〔overview〕

The present invention forms a slit-shaped paper ejection port with a fixed guide and a movable guide that rotates between a normal position and a holding rotation position, and inserts paper into the movable guide using air discharge pressure or air suction force. By providing an air outlet or an air suction port that guides air in a desired direction, the purpose described in - is achieved.

〔Example〕

The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows the external appearance of an inkjet recording apparatus according to an embodiment of the present invention, and a slit-shaped discharge port 1 is provided on the upper surface of the apparatus for discharging recorded paper. This discharge port 1 includes a fixed guide 2 integrally formed with the exterior case and a movable guide 3 rotatably mounted to the fixed guide.
It is formed by.

a fulcrum portion 4A formed at both ends of the movable guide 3;
4B, it is attached to the fixed guide 2 (or exterior case) and can be rotated between the normal position and the lifting rotation position shown in the figure.
At the lifting and rotating position, the hooks 5A formed on both ends
, 5B are held by being hooked to the fixed guide 2.

2 and 3 show the recording head section and the discharge port 1.
The paper 7 guided around the paper feed roller 6 is pitch-fed upward between the platen roller 8 and the recording head 9, and the recorded paper is guided and ejected to the outside as shown. Ru.

FIG. 2 shows the movable guide 3 in the normal position, and FIG. 3 shows the movable guide in the lifting and rotating position.

4 and 5 show the movable guide 3. FIG.

4 and 5, compressed air (Jt supply path 10 and suction air passage 11 are formed in the movable guide 3, and the guide surface 12 on the discharge port 1 side in the normal position of the movable guide An air discharge port I3 communicating with the air supply path IO is formed, and an air suction port communicating with the suction air path 11 is formed on the bottom surface 14 (bottom surface in the normal position) which becomes the discharge guide surface in the lifting and rotating position of the movable guide. 15 is formed.

These air discharge ports 3 and air suction ports 15 are formed at a plurality of locations along the discharge port 1 at predetermined intervals as shown in the figure.

The compressed air supply path 10 opens on the side surface of the movable guide 3, and the opening is connected to the discharge side of the air pump 16 via a tube 17. On the other hand, the suction air passage 17&]1 is also opened on the side surface of the movable guide 3, and is connected to the suction side of the air pump 16 via a tube 18.

A sharp blade 19 is formed at the paper exit edge of the illustrated movable guide 3 in its normal position, so that the movable guide 3 itself can be used as a cutter for cutting the paper 7. Further, the movable guide 3 may be made of a transparent material such as transparent acrylic, and may be used as a see-through section for checking the printing state of the paper 7 to be discharged.

When the movable guide 3 is used in the normal position, as shown in FIG. 2, the paper 7 recorded and sent to the discharge port 1 is moved toward the fixed guide 2 by the air discharge pressure discharged from the air discharge port 3. It is ejected in a pushed state. Therefore, the paper 7 is guided away from the recording head 9 and along the platen 8, and at the discharge port 1, the ink-attached surface does not contact any guide portion, and the opposite surface (back surface) is guided by the fixed guide 2. It is guided and discharged in a state where it is in contact with.

In this way, the paper 7 can be guided in good alignment with the platen 8 without contaminating the ink-attached surface. Furthermore, since the ca1 air is discharged onto the ink-adhering surface, the effect of accelerating the drying of the ink can also be obtained.

Note that although air suction force acts near the air suction port 15 in FIG. 2 as well, its position and direction are set so as to have almost no effect on the paper 7.

When using a sturdy material such as thick paper or plastic sheet as the paper 7, lift the movable guide 3 to the rotating position as shown in Fig. 3, and make the ejection path of the paper 7 closer to a straight line than in the case of Fig. 2. is preferred.

In the state shown in FIG. 3, the back surface of the paper 7 is attracted to the movable guide 3 by the air suction force near the air suction port 15. Therefore, in this case as well, an appropriate gap is formed between the paper 7 and the recording head 9 along the platen 8, and the ink adhesion surface (the surface of the paper 7) does not come into contact with the guide section at the discharge port. It is guided and discharged. Furthermore, since the distance from the recording head 9 to the discharge port 1 is increased, the drying distance can be increased, and the ink-attached surface can be sufficiently dried before being taken out.

Note that although the discharge pressure acts near the air discharge port 13 in FIG. 3 as well, its position and direction are set so as to have almost no effect on the paper 7.

According to the above embodiment, regardless of the 70 types of paper, the paper 7 can be correctly guided along the platen 8 and can be ejected without staining the ink-attached surface, and furthermore, the drying of the ink-attached surface can be promoted. Now you can also do it.

Note that the present invention is applicable to an inkjet printing apparatus.
Regardless of the difference between serial recording method or line recording method,
It can be widely applied regardless of whether rolled sheets or cut sheets are used, and regardless of the number of recording heads such as color recording or monochrome recording.

〔effect〕

As is clear from the above description, according to the present invention, it is possible to obtain an inkjet recording apparatus that can reliably prevent the phenomenon in which undried adhering ink on recorded paper comes into contact with the guide portion and stains the paper.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an external appearance of an inkjet recording apparatus according to an embodiment of the present invention; Fig. 2 is a longitudinal cross-sectional view of the recording head and discharge port portion of Fig. 1; 4 is a front view of the movable guide of FIG. 1, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4. ] -----------Discharge port, 2------Fixed guide, 3
-----1 movable guide, 7--paper, 9-----1 recording head, 13-----air discharge port, I 5-----
- One air suction port. Agent Patent Attorney Yasushi Ooto Figure 1

Claims (1)

[Claims] (1) In an inkjet recording device that records by adhering ink droplets ejected from an orifice provided in the recording head to paper, the slit-shaped discharge port for discharging the recorded paper is connected to a fixed guide and a normal position and a lifting rotation position. An inkjet recording apparatus comprising a movable guide that rotates between the movable guide and an air discharge port or air suction port that guides the paper in a desired direction using air discharge pressure or air suction force.