JPS5860761A - Double face recording device - Google Patents

Abstract

PURPOSE:To enhance the processing speed, by providing the first recording head which reproduces a picture to record it on the first face of a recording paper, the second recording head which reproduces a picture to record it on the second face of the recording paper, and a carrying path through which the recording paper is carried. CONSTITUTION:In a recording position B of a double face recording device, a recording head 46 is driven by the picture signal output from the first memory M1, and a picture on the first face of an original 1 is reproduced and is recorded on the first face of a recording paper 20. The recording paper 20 where pictures are already recorded on both faces is ejcted and stored on a tray 42 for double-faced recording papers, and meanwhile, the succeeding recording paper 20 where the picture is recorded on the first face is carried up to a resist roller 23 in the rear, and a recording head 47 is driven in a recording position C to reproduce and record a picture on the second face of the recording paper 20. In this case, since a recording paper carrying path between recording heads is made longer than a maximum length of the recording paper 20 in the carrying direction, the recording processing speed is enhanced.

Description

[Detailed description of the invention] The present invention relates to a double-sided recording device having a recording head.

There are various types of duplex recording devices that record on both sides of recording paper, but in the case of duplicate recording in which the same document is recorded twice or more, double-sided recording on the preceding recording paper is completed. Then, the next new recording paper is fed to the conveyance path. For this reason, these recording devices have relatively slow recording processing speeds and tend to be larger in size.
The object of the present invention is to eliminate such conventional drawbacks, and to prevent the fal side of the following recording paper from being recorded by the other recording head while one recording head is recording the second side of the preceding recording paper. An object of the present invention is to provide a double-sided recording device capable of recording.The present invention will be described in detail below with reference to one drawing.

FIG. 1 shows the internal structure of a double-sided recording apparatus showing an embodiment of the present invention, and first, the reading means shown in the upper part of the drawing will be explained. In the figure, / is a sheet-like original, 2 and 3 are feeding rollers that feed the original /, and ! n7 provided on the original feeding trajectory
'j platen and this platen! Read the entire bottom surface of the original at position A. B is a document feed guide that holds down the document / to focus it well, 7, / is a light emitting element of a photocoupler that detects the document/Q position, W, 10 is a light receiving element of the photocoupler, and // is a reader. 0゛1.2 is the platen, which is the document tray that stores the completed documents. The document reading unit installed on the lower side of the
It has parts 73~/g which will be described later. /3 is a document illumination lamp using a light source such as a halogen lamp, 0/g illuminates the reading position A from below, and /! is a folding mirror.
is a one-dimensional image sensor consisting of an imaging lens and a large number of photodetectors arranged in /1fl- dimension, and in this example, COD
A line image sensor is used. The image sensor/
Reference numeral 6 converts the incident image light into an electrical signal, electrically processes this electrical signal in a processing circuit (not shown), and records it on a recording paper by a recording means to be described later.

The operation of the reading means having such a configuration will be explained. When a zero-sheet original is inserted toward the feeding roller, the insertion of the original is detected by a photocoupler consisting of a light emitting element 7 and a light receiving element, and the feeding roller and 3 begins to rotate. The O document / is fed in the direction of the arrow while being held by the feed roller 2, and is delivered to the platen! At that time, the leading edge of the original is detected by a photocoupler consisting of a light emitting element r and a light receiving element 10, and the detection output is used as a synchronization signal during recording as described later. A platen placed on the feeding path! (2) At the reading position A, the lower surface of the original l is read by the reading unit 7.2. The document / is further fed by the feeding rollers 2 and 3, and after the above-mentioned image gI reading is completed, the document / is discharged to the document tray //K. Furthermore, when reading the top side of the original, the operator takes out the original from the original tray, turns it upside down, and inserts it again toward the feed roller 2. Same as above.

If you are wondering about the reading unit /-2 at this time, the original image at the above-mentioned reading position A[ is irradiated with the lamp /3, and the reflected light is reflected from the lens /! An image is formed on the COD line image sensor f/d through an optical path constructed from the following. The image sensor/6 obtains time-series image signals according to the incident radiation energy.

Next, a recording means that performs recording using the image signal from the above-mentioned reading means will be explained. In the figure, λθ is a recording paper, 2/ is a paper feed roller that feeds the recording paper 20, -
2-? and 123 haresistrora and photocoupler? , /θ This roller is synchronized with the document position detection signal of /θ.
22,. 2j is rotated to align the image recording; If~30 is a conveyance roller that conveys the recording paper 20;
37~g θ is a conveyance guide for smooth conveyance of the recording paper 20, and g/g is the recording paper after single-sided recording. 9t3 is a conveyor belt that conveys the recording paper λθ to the single-sided paper output tray 4tl. 4tFi
A photocoupler light emitting element that detects the position of the recording paper 20, &
A reproduction image corresponding to the output image signal of the COD line image sensor/6 is formed on the recording paper 20 by a recording head such as an inkjet head, which is also the light receiving element of the photocoupler. This recording head @4.4t? Fi, for example, Ogu♂, which is a so-called full multi-head arranged in a direction almost perpendicular to the conveyance direction of the recording paper J, and Geta is a suction fan as a suction means, jO,! / is a porous guide plate, and the recording paper -TO is drawn from the suction fans at and at K.
suction to the guide plate, TO, j/ to maintain the flatness of the recording paper -20, and then press the recording paper -〇 and the recording head 〇.

Keep the distance between you and Da 7 o! 2Fi is a transport path switching finger (selector finger) that is slightly bent inward, and this switching finger! 2 to the actual position shown in the figure, the multi-layer recording paper 20 is guided to the single-sided paper discharge tray/, and on the other hand, at the position indicated by the broken line, the recording paper 20 is guided to the rear recording head e2. ! Reference numeral 3 denotes a housing that houses the above-mentioned reading means and recording means; The height of both heads E, g, and 4t7 are arranged at approximately the same position, and the direction of both heads 4t, The length of the transport path between 0 and 1 recording 1 and 2, in which the outlet of the rear suction fan getter opens behind the head ≦, is at least the maximum length in the feeding direction of a predetermined recording paper sheet. 0Explain the recording operation of the recording device configured in this way0 First, in the case of double-sided recording, in the case of duplicate recording in which the same document is recorded more than once, the operator can press the selection key (not shown). When you press it all the way down to specify multiple recording numbers and double-sided recording, the switching claw! is set by rotating it to the position shown by the broken line. When the document / is inserted, the paper feed roller / and the transport roller 2 rotate in synchronization with the detection signals of the photocouplers 2 and 9, and the recording paper θ is moved between the transport guides 3 and 3.
It is conveyed to the registration roller 22 in the front along this direction. Photocoupler? , 10 detects the leading edge of the document/, the registration roller 2J rotates in synchronization with the detection signal.
Recording paper 20 f) E guide plate! O and guides 33 and 3
The paper is conveyed to the recording position B through the space between the paper and the paper. At this time, the paper feeding speed of the registration row 22.2 and the document feeding speed of the feeding roller are kept the same. Here, at the recording position B, the recording head 6 is driven by the image signal output from the reading image sensor/g, and the image recording paper on the lower surface of the original is driven.
Play and record on the first side of 20. At the same time, the image signal output from the image sensor/B is stored in a first memory M1 (not shown) for duplicate recording. At this time, the recording paper 20 is moved through the porous guide plate jO by the suction fan.
, the plane of the recording paper -0 is maintained at the recording position, and the distance between the recording head and the recording paper -0 is also kept constant.

Furthermore, conveyance roller 7! ! The recording paper 2θ is conveyed to the rear registration roller 3 at ~2r, and when the leading edge of the recording paper -0 reaches the registration roller 3, @feeding is temporarily interrupted. In response to this interruption, a photocoupler installed near the registration roller 23 synchronizes with the detection signal of the light and transfers the roller 22! ~
It is necessary to stop JJ'. Also, the recording paper θ
When the rear end of the recording paper 0 passes the recording head 4tt as it is conveyed to the rear registration roller 23,
Paper feed roller! Rotate the / and transport roller 2 da, and move the new recording paper -〇 to the front CD, L/') S) a-5
22. The synchronization of the rotations of these rollers 2 and 2 is achieved by stopping the drive of the recording head g, stopping the image signal output from the image sensor, or by stopping the conveyance roller 2! Next, the document, whose first side (back side) is directed toward the reading unit l-2 by the operator, is transferred to the feed roller. Inserted and photocoupler? , /θ detects the leading edge of the document l, the front registration roller 2- and transport roller 2da and -2! synchronize with the detection signal. , and the rear registration roller 3 and conveyance rollers 26 to 2? and rotates.

As a result, the preceding recording paper 2Q becomes a guide plate! / and guide 3? At the same time, the new paper θ following 1 is also conveyed through the space between paper 0 and paper 0 and reaches the recording position @C.
At the 0 recording position 11c, which reaches at the same time, the recording head 7 is driven by the image signal output from the image sensor 1, and the image on the fourth side of the original 1 is reproduced and recorded on the first side of the recording paper 0. @At the same time, the image sensor/
The image signal output from the second
is stored in the memory M2. On the other hand, at the recording position BK-, the recording head dog 6 is driven based on the sum of image signal outputs from the first memory M1, and the image gIf of the first side of the original / is driven! :
The information is reproduced and recorded on the first side of the recording paper 20.

The recording paper 20 on which double-sided recording has been performed is discharged and stored in the double-sided paper discharge tray 4t with its WX-2 side facing upward. On the other hand, the subsequent recording paper that has finished recording on the 7th side is conveyed by the registration roller 2J o behind 0fi Here, if the number of recording sheets is specified to be fI - J sheets, the following recording paper mentioned above −〇 indicates recording position CK without stopping at registration roller 23
Reach ◇At this time, Hotokapuraku Z.

Gu! The image signal of the second memory M2 is supplied to the recording head 4t7 in synchronization with the detection signal of the second side of the document.
゛Reproduce and record Ken on the second side of recording paper J.

Subsequently, the recording paper θ is discharged and stored in the paper discharge tray 2, and the recording operation is completed.

On the other hand, if the number of sheets to be recorded is specified as 3 or more, almost at the same time as the recording paper -〇, which has finished recording on the first side, reaches the rear registration roller 3, a new recording of the next third sheet is started. The paper 20 is conveyed so as to reach the front registration roller λ. Next, the recording heads 6 and 2 are driven to output image signals from the corresponding memory M1 or M2 at the corresponding recording position B-i or C of both recording sheets a and 20, respectively. The original image is reproduced and recorded on the recording paper-〇, 20.

By repeating the above-mentioned operations one after another in this way, the desired number of sheets can be recorded. length? Since the length is at least longer than the length of the recording paper 20 in the feeding direction, one of the recording heads 4t7 can touch the back side of the preceding recording paper 20 (the second
While recording the front side), it is possible to record the front side (first side) of the connected recording paper 〇 using the other recording head every 4t. The path length of the device is shortened - miniaturization is obtained;
In addition, in this example, since there is a predetermined distance between the registration roller 2 and the recording head dock 2, the recording processing speed becomes relatively high, and the recording processing capacity is significantly improved. Since it is necessary to make the distance between the roller 3 longer than the length of the recording paper 20, if the registration roller 3 is placed at the same position as the head 4t7, the head %
and 4t2 can be established as described above.

Next, in the case of recording only on one side of the recording paper 20, if duplicate recording is required, the operator presses the selection key shown in the cine diagram to instruct multiple numbers of sheets to be recorded and single-sided recording. And switching claws! is rotated to the solid line position shown in the figure and set.0 This closes the conveyance path to the rear recording head 2, so the recording paper aθ that has finished recording on the Wc1 side in the same manner as described above is , switching claw! - The conveyor belt 4t3 and the conveyor guide 3! The first side of the recording paper is ejected onto the single-sided paper ejection tray/ along flJKt above. At this time, the trailing edge of the recording paper 2θ
When it passes /A, the paper feed roller 2/ and the transport roller 2g are rotated, and the next new recording paper λθ passes through the registration roller 22 and reaches the recording position B, =. Subsequently, the recording hella dog t is output by the wiJgI signal output from the memory M1.
to reproduce and record one draft image on one side of the recording sickle paper σ,
The recorded recording paper 2θ is ejected and stored in the single-sided paper ejection tray. In this way, reproduction and recording are performed one after another according to the image signal output from the memory M1, and the overlappingly recorded recording paper 2
You can get the desired number of 0fpfi sheets.

In addition, if duplicate recording is not required, the operator can
When the number of recording sheets is instructed to be 7, the operation of the memory cap and M2 is stopped, and the feeding of the connected recording paper 20 for duplicate recording is stopped.Other operations are almost the same as above. 0 FIG. 2 shows the internal structure of a double-sided recording apparatus showing another embodiment of the present invention, and the same parts as in FIG. 1 are denoted by the same reference numerals. Note that the reading means is the same as in Figure 1, so the description is omitted.
In the figure, A0 is a rotating drum interposed in the conveyance path between the recording head B and 4t7, 1- is a paper pressing roller g that is separated from the recording head by a predetermined distance, and disintegrates into contact with the outer peripheral surface of the rotating drum gθ.
Reference numeral 3 denotes a movable conveyance guide disposed between paper presser rollers O/ and 6. By moving this guide 3 to the position indicated by the broken line in the figure, the recording paper λθ that has been recorded on one side can be ejected for single-sided recording. It leads to tray 41/. ≦Guru 6 is the conveyance roller,
20. is a conveyance guide that smoothly conveys the recording paper λθ, and a roller 29 and t! This embodiment is different from the first embodiment shown in Fig. 1M7, and is a conveyor belt wound between the belts and the conveyor belt. 0The length of the transport path between the recording head and &7 is made longer than the predetermined length of the recording paper 20, as in the first embodiment.Next, the recording operation Explain. Roller 2/and 1 29t
The recording paper is conveyed along the guide 3/3 to the registration roller 2 at the bottom by the rotation of the registration roller λ. 0 and the guides 33' and 3, and is transported to the recording position BK. At this recording position B, the lower recording head is driven by the image signal output from the image sensor/lj or memory M1, and the image read from the original is reproduced and recorded on the first side of the recording paper -〇. Ru・Moreover, Laura, 2! Due to the rotation of θ and g/, the recording paper θ enters between the rotary drum gO and the movable conveyance guide≦3. At this time, if double-sided recording is not required, the movable conveyance guide 47 is moved downward from the i-drum 10 according to the operator's instructions, and set at the dashed line position KTo in the figure, so the recording paper λθ is placed on the guide 43. The paper is ejected and stored on the single-sided paper ejection tray.

On the other hand, in the case of double-sided recording, the movable conveyance guide g3 is set in advance at the solid line position in the figure along the concentric circle of the drum ΔO according to the operator's instructions, so that the recording paper 20 is transferred to the rotating drum 10 that rotates clockwise. guided by guide 6
r, and is conveyed to guide 3? by roller 2r. Next, the recording paper 20 is conveyed to the upper registration roller 223 along the guide plate j.
/ and guide 3 and <10 to record position C.
[4[? 0 At this recording position C, the image signal output from the image sensor/g or the memory M2 drives the RAD Z2 to the upper recording position, and the image read from the original is reproduced and recorded on the first side of the recording paper 20. Furthermore, the recording paper 20 is ejected and stored along the guide 6 and 20 into the duplex paper ejection tray λ with its first side facing up. Ru.

The other operations are the same as those in the first embodiment, so their explanation will be omitted. Here, the length of the transport path between 4/7 for each recording head y is made longer than the predetermined length of recording paper -0. Therefore, when one recording head 4t7 is recording the back side (second side) of the preceding recording paper 20, the other recording head 4tt is recording the front side (seventh side) of the following recording paper 20. ) can be recorded. Therefore, similar to the first embodiment of this embodiment, the recording processing capacity can be improved.

As explained above, according to the present invention, the recording paper conveyance path between the plurality of recording heads is formed to be longer than the maximum length in the feeding direction of the recording paper used. The conveyance path can be shortened, and the recording processing speed can be significantly improved.

Note that the double-sided recording apparatus of the present invention is not limited to those with a sheet-type reading mechanism as described above, but can be applied to any type of apparatus, such as a book-type original reading mechanism. In addition, the recording head can be of any type, including not only the inkjet type but also other dot types.Furthermore, as a detection means, a photocoupler consisting of a light emitting element and a light receiving element was used, but there are also holes. Of course, other detectors such as elements or microswitches may also be used.

[Brief explanation of drawings]

FIG. 1 is an internal configuration diagram of a double-sided recording apparatus showing one example of the present invention, and FIG. 2 is an internal configuration diagram of a double-sided recording apparatus showing another embodiment of the present invention. /...Original, 2,3-feed roller, G...Original feed table,! -Platen, 6...Document feed guide 1 2,? ...Photocoupler light emitting element 1? , 10-photocoupler light receiving element, //... original tray, /-2- original reading unit. /3...original illumination lamp, /ri...mirror, /!・
...imaging lens, /6...image sensor,
θ...Recording paper, 2/...Paper feed roller 1.22.2
3-・Registration roller, 3θ-conveyance roller. 3/~Daθ...Conveyance guide, 4tl-Single-sided paper output tray 1 (7j...Double-sided paper output tray, Da3-Transportation belt, pg...Photocoupler light emitting element, Lid...Photocoupler Light receiving element, E4.g7 --- Recording head, !J', 4t9-
Suction 77n! θ,! /...Porous guide plate! λ-Transport path switching claw,! 3.--Housing, 6θ one-rotation drum, t/, t, 2...Paper press roller, 63.--Movable conveyance guide, Goguru Otg...Conveyance roller, 62-2
θ-transport guide, 2/...transport belt, A +
+Reading position, B, C...Recording position 0 Patent applicant Canon Co., Ltd.

Claims (1)

[Claims] In a double-sided recording device that reproduces and records the original image on both sides of recording paper, a seventh recording head reproduces and records on the seventh side of the recording paper, and a first recording head reproduces and records on the first side of the recording paper. It has a recording head and a conveyance path for conveying the recording paper from the first recording head to the second recording head, and the conveyance path is formed to be longer than the length of the recording paper in the feeding direction. Double-sided recording device.