JPH025187B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a double-sided recording apparatus that performs recording on both sides of recording paper using an inkjet recording method. especially,
The present invention relates to a new double-sided recording device that takes into consideration high-speed recording when performing double-sided recording mode and single-sided recording mode, miniaturization of the device, and stability of images after recording.

(Prior Art) Various double-sided recording devices that record on both sides of recording paper have been proposed. However, in a double-sided recording apparatus using, for example, an electrophotographic copying machine, the paper feeding path for recording paper is very long, which tends to cause jams. Furthermore, the device becomes extremely large.

On the other hand, in Utility Model Application Publication No. 56-17139,
A double-sided recording device has been disclosed that performs double-sided recording by providing print heads on both sides of a printing paper conveyance path. This document merely discloses a double-sided recording device that can use the same printing mechanism, but does not relate to the printed paper after recording, and only discloses double-sided recording. Therefore, in the above-mentioned double-sided recording device,
Since there is no suggestion as to how to transport the printed paper after printing, there is no guarantee that the actual recording apparatus can be made smaller.

(Technical Problems to be Solved) The present invention provides a double-sided recording device capable of performing single-sided recording in addition to double-sided recording, which can shorten the conveyance path of the recording paper, can perform single-sided recording at high speed, and is capable of recording after recording. To provide a compact double-sided recording device capable of producing high-quality images.

(Summary of the Invention) In order to achieve the above-mentioned object, the present invention transfers a recording paper on which double-sided recording has been performed by first and second inkjet recording means for double-sided recording to a second inkjet recording means. a double-sided recording mode in which the next recording sheet with double-sided recording is deposited on the recorded side; and a first recording position and a second inkjet recording position recorded by the first inkjet recording means. Between the second recording position recorded by the recording means, the recording paper which has been recorded on one side by the first inkjet recording means is placed next to the side recorded by the first inkjet recording means. 1. A double-sided recording device comprising: a single-sided recording mode in which recording paper on which one-sided recording is carried out is conveyed and stored so as to be stacked;

According to the present invention, the recorded image after recording is not disturbed by the recording paper that is deposited next.
To provide a compact double-sided recording device as a whole, which can produce high-quality images in both double-sided and single-sided modes, shorten each conveyance path, and enable high-speed single-sided recording.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a double-sided recording device according to an embodiment of the present invention, in which 1 is a document guide, 2 is a document, 3 is a document upper guide, and 4, 4', 5, 5', 6, and 6' are document conveyors. 7 is a lower platen, 8 is a presser plate, 9 is an upper platen, 10 is a presser plate, and 11 is a document tray.

The original 2 is guided by the original guide 1 and transported in the direction of the arrow while being sandwiched between original transport rollers 4, 4', 5, 5', 6, 6'. The original 2 is read at point A of the lower platen 7 and point B of the upper platen 9 provided on the original transport locus, and is stored in the original tray 11 .

The upper document guide 3 is fixedly installed so that it can be optimally sandwiched between the transport rollers 4 and 4'. Also presser plates 8, 10
is provided to form an image of the original 2 in good focus.

12 is a bottom reading unit, 13 is a top reading unit, 14, 14', 14'', 16, 1
6', 16'' are mirrors, 15, 17 are light sources, 18,
19 is a lens, and 20, 21 are one-dimensional image sensors.

At the point A, light is irradiated by the light source 15, and when the original 2 is transferred, the mirror 14,
14', 14'' and the lens 18, the image light of the lower surface of the original 2 is incident on the image sensor 20 by radiant energy.
Also at the point, light is irradiated by the light source 17, and when the original 2 is transferred, the mirrors 16, 16',
16'' and a lens 19, image light from the upper surface of the original 2 is incident on the image sensor 21 using radiant energy.

The image sensors 20 and 21 convert incident image light into electrical signals, electrically process the electrical signals in a processing circuit (not shown), and record them on a recording paper by a recording means described below. 51
is the recording paper, 52 is the paper feed roller, 53, 54, 5
4', 55, 65, 66 are conveyance rollers, 53'5
4'', 55', 65', 65'', 66' are nip rollers, 56, 67 are belts, 57 is a selection claw, 58 is a selection claw fulcrum, 59, 63, 64, 68, 72, 7
3, 74 are guides, 60, 69 are suction means, 6
1, 70 is an inkjet recording head, 62, 7
1 is a recording paper tray.

The recording paper 51 is guided by paper feed rollers 63 and 6.
4, is sandwiched between the conveyance roller 53 and the nip roller 53', and is conveyed to the lower surface recording position point C while lying on the surface of the belt 56.
At this point, the recording head 61 performs recording corresponding to the read image signal at the aforementioned point A, and the sheet is transferred between the conveying roller 54 and the conveying roller 54'. Furthermore, the recording paper 51 is transported toward the top recording position D, and at the point D, the recording head 70 performs recording corresponding to the image signal read at the aforementioned point B.

The recording paper 51 that has undergone double-sided recording as described above passes through the conveyance roller 65, the nip rollers 65' and 65'', the conveyance roller 66, and the nip roller 66', and then is placed on the recording paper tray 71 for the second double-sided recording. They are stored in the tray 71 with their sides facing upward.Thereby, when stacking subsequent double-sided recording sheets, the side that has been sufficiently fixed by the recording on the first side is placed on the second side. Since it becomes a surface, image distortion is prevented.

The distance between the lower surface recording position point C and the upper surface recording position D point during the above recording is the same as the point A on the lower surface platen 7 and the point B on the upper surface platen.Double-sided recording is performed at the same time as reading without requiring a memory installed. It is possible.

Next, when recording on only one side is required, after recording by the recording head 61 on the above-mentioned point C, move the selection pawl 57 provided on the conveyance roller 54 and the conveyance roller 54' using the selection pawl 58 as a fulcrum and arrows. The selection claw 57 is set to the broken line signal by rotating it in the direction shown in FIG. As a result, the aforementioned conveyance roller 54 and conveyance roller 5
The leading edge of the recording paper 51 that has passed through 4' is transferred to the conveyance roller 5.
4 and the other Nitsu roller 5 provided on the
4', the sheets are transferred to the recording paper tray 62 through the conveyance roller 55 and the nip roller 55', and are stored in a stacked state in order with the single-sided recorded side facing upward. Therefore, as in the case of double-sided recording, image disturbance can be prevented, and since it is not necessary to pass through the point D, single-sided recording can be performed at high speed.

The suction means 60 and 69 are constituted by suction fans, for example, and are means for maintaining the flatness of the recording paper 51 at the recording points C and D and the distance between the recording paper 51 and the recording heads 61 and 70 to the best possible extent.

Belts 56 and 67 hold the recording paper 5 at recording points C and D.
1. It serves both as a flatness reference and as a conveying means, and is rotatable. (Alternatively, it is also possible to fix it only as a standard for flatness.

Guide 59, 63, 64, 68, 72, 73,
Reference numeral 74 denotes means for smoothly transporting the recording paper 51.

The inkjet recording heads 61 and 70 are so-called full multi-heads arranged in a full line in a direction approximately perpendicular to the conveying direction of the recording paper.

Reference numeral 100 denotes a housing that houses the above-mentioned reading unit and recording means.

As described above, since the image recording apparatus of the present invention is provided with the first and second recording members in order with respect to the conveyance path for conveying the recording paper, there is no need to fold back the recording paper for double-sided recording. It disappears. Therefore, according to the present invention, the conveyance path of the recording paper is shortened, and
It is possible to provide a duplex device that is extremely compact and less likely to cause jams in recording paper.

Furthermore, by using an inkjet head as the recording member, a large-scale drive mechanism unlike an electrophotographic apparatus is not required. Particularly in the case of a full multi-head, no driving mechanism is required at all in the recording section.

In this embodiment, since the first and second inkjet recording heads are separated from each other, the quality of the image formed on the recording head and the recording paper is further improved.

If a configuration different from the above configuration is used, that is, if single-sided recording is performed using the last second inkjet recording unit instead of the first first inkjet recording unit that performs double-sided recording, there is a disadvantage that the recording time becomes longer, and the above-mentioned If the first and second inkjet recording means are reversed, the conveyance path must be lengthened to ensure the fixation of the inkjet recorded surface, but the configuration of the present invention eliminates these drawbacks. are doing.

(Effects of the Invention) The present invention is particularly advantageous in that the first recording position recorded by the first inkjet recording means and the second recording signal recorded by the second inkjet recording means are Single-sided recording, in which the recording paper recorded on one side by the first inkjet recording means is transported and stored so that the next recording paper recorded on one side is deposited on the side recorded by the first inkjet recording means. Since the recorded image is not disturbed by the recording paper that is deposited next, the image can be of high quality in either double-sided or single-sided mode, and each conveyance path can be In addition to being able to shorten the time, high-speed single-sided recording was also possible, and an overall compact double-sided recording device could be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the recording apparatus of this embodiment. In the figure, 2 is the original, 4, 4', 5, 5', 6,
6' is a conveying roller, 12 is a bottom document reading unit, 13 is a top document reading unit, 51 is a recording paper, 61 is a bottom recording head, 70 is a top recording head, 53, 54, 55, 65, 66 are conveying rollers, Reference numerals 60 and 69 indicate adsorption means, respectively.

Claims (1)

[Scope of Claims] 1. A conveyance path for conveying recording paper, a first inkjet recording means for recording at a first recording position on the first side of the recording paper conveyed by the conveyance path, and the conveyance path. a second inkjet recording means for recording on a second side of a recording paper conveyed at a second recording position located downstream of the first recording position with respect to the conveyance direction; In this step, the recording paper on which double-sided recording has been performed by the first and second inkjet recording means is stacked on the side recorded by the second inkjet recording means, the next recording paper on which double-sided recording has been performed. a double-sided recording mode in which the paper is conveyed and stored as shown in FIG. A double-sided recording device comprising: a single-sided recording mode in which the next recording paper on which single-sided recording is deposited is conveyed and stored on the same side. 2. The double-sided recording device includes a document conveyance path for conveying the document, a first document reading means for reading the first side of the document conveyed to the document conveyance path at a first reading position, and a document conveyance path for conveying the document to the document conveyance path. The second manuscript to be
a second document reading means for reading the surface at a second reading position located downstream of the first reading position with respect to the document conveyance direction;
The recording paper conveyance path distance between the recording position and the second recording position is equal to the document conveyance distance between the first reading position and the second reading position, and the first document reading means Based on the signal from
Recording is performed using the second inkjet recording means, and the second
The double-sided recording apparatus according to claim 1, wherein the second inkjet recording means performs recording based on a signal from the document reading means. 3 The first and second inkjet recording means are:
The double-sided recording apparatus according to claim 1 or 2, which is a full-line inkjet recording means capable of recording over the maximum recording width of the recording paper.