JP2002248812A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recorder in which the content recorded on the surface of a sheet can be recognized from the rear surface side even if the recording face of the sheet is curled inward. SOLUTION: The recorder for recording on a sheet using a recording means comprises a section for recording on the surface of the sheet, and a section for recording on the rear surface of the sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording on a sheet by a recording means, and more particularly to a recording apparatus for recording a large sheet.

[0002]

2. Description of the Related Art Conventionally, in a recording apparatus for recording on a large-sized sheet, the size of the sheet to be recorded is usually wide and long. Curled.

[0003]

However, when recording is performed in the above-described conventional recording apparatus, the recording surface curls inward after the recording and fixing, so that the recording surface becomes invisible.

Therefore, an object of the present invention is to make the contents recorded on the front surface of the sheet visible from the back surface side even if the recording surface of the sheet curls inward.

[0005]

In order to achieve the above-mentioned object, a typical configuration of the present invention is a recording apparatus which has recording means and performs recording on a sheet. It is characterized by having a front surface recording unit for performing recording and a back surface recording unit for performing recording on the back surface of the sheet.

[0006]

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of the recording apparatus according to the first embodiment.

(Configuration of Recording Device 50) As shown in FIG.
The recording device 50 includes a large-sized roll-shaped sheet 1 as a surface recording unit, a sheet mounting shaft 2 for attaching the sheet 1, and a horizontal feeding roller 6 as first feeding means for feeding the sheet.
A surface recording head 3 as first recording means for performing recording on a sheet supplied from the sheet mounting shaft 2 by a horizontal feeding roller 6, and a guide for the surface recording head 3 in a direction orthogonal to the sheet conveying direction. And a horizontal platen 5 for holding a sheet at a position facing the front recording head 3.

Further, the recording apparatus 50 serves as a backside recording section, a vertical feeding roller 9 for changing the conveying direction of a sheet after recording from a horizontal direction to a vertical direction, and recording on a sheet supplied by the vertical feeding roller 9. Back recording head 7 for performing
A back side carriage shaft 8 for guiding a back side recording head 7 as a second recording unit in a direction orthogonal to the sheet conveying direction, and a vertical platen as a holding unit for holding the sheet at a position facing the back side recording head 7 A platen guide 12 for guiding a sheet between the platen 10 and the vertical platen 10; and a discharge roller 11 for discharging the front and rear sheets after recording.

(Recording means) The two recording means, the front recording head 3 and the back recording head 7, record an ink image on the recording sheet conveyed by the conveying means. In this apparatus, an ink jet recording system for discharging ink from a recording head for recording is used. That is, the recording head has a fine liquid discharge port (orifice), a liquid path, an energy action section provided in a part of the liquid path, and an energy generation section for generating droplet forming energy to act on the liquid in the action section. Means.

As an energy generating means for generating such energy, a recording method using an electromechanical transducer such as a piezo element or the like, an electromagnetic wave such as a laser is irradiated to generate heat, and droplets are discharged by the action of the heat. There are a recording method using an energy generating means, and a recording method using an energy generating means for discharging a liquid by heating a liquid by an electrothermal converter such as a heating element having a heating resistor.

Among them, a recording head used in an ink jet recording method for discharging a liquid by thermal energy has a liquid discharge port (orifice) for discharging a recording droplet to form a discharge droplet at a high density. Since they can be arranged, high-resolution recording can be performed. Among them, a recording head using an electrothermal transducer as an energy generating means is advantageous because it can be easily made compact, easily mounted at a high density, and inexpensively manufactured.

In this embodiment, the ink is ejected by energizing the electrothermal transducer in response to a recording signal and utilizing the film boiling caused by the thermal energy to grow and shrink bubbles generated in the ink. The recording is performed by discharging the ink from the discharge port.

(Operation of the Recording Apparatus 50) The sheet 1 mounted on the sheet mounting shaft 2 is fed to a horizontal feeding roller 6 and conveyed horizontally on a horizontal platen 5. Here, the front side of the sheet is recorded by the front side recording head 3 which slides the front side carriage shaft 4 in a direction orthogonal to the sheet conveying direction.

The leading end of the sheet that has reached the vertical feeding roller 9 after the recording on the front surface is changed in direction from the horizontal direction to the vertical direction, and is conveyed from the horizontal platen 5 to the vertical platen 10. Here, on the back side of the sheet, information (title name, comment, etc.) relating to the content recorded on the front side is recorded by the back side recording head 7 which slides the back side carriage shaft 8 in a direction orthogonal to the sheet conveying direction. . Thereafter, the leading end of the sheet is conveyed by the platen guide 12 so as to mesh with the discharge roller 11, and is discharged outside the apparatus by the discharge roller 11.

As described above, the present embodiment is characterized in that it has a front surface recording unit for recording on the front surface of a sheet and a back surface recording unit for recording on the back surface of the sheet. The unit includes a backside recording head 7 that performs recording on the backside of the sheet, a vertical platen 10 that holds the sheet at a position facing the backside recording head 7, and a platen guide that reliably conveys the sheet onto the vertical platen 10.
12 and a vertical feed roller 9 for transporting the sheet on the vertical platen 10, so that even if the recording surface of the discharged sheet is curled inward, the content recorded on the sheet surface is It can be seen from the side.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic sectional view of the recording apparatus according to the second embodiment. Note that the same components as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

(Configuration of the recording device 51) As shown in FIG.
The recording apparatus 51 of the present embodiment includes a front recording head 3 as a first recording unit and a back recording head 7 as a second recording unit.
And the front and back recording heads 20 integrally configured.

The recording device 51 serves as a front-side recording section for the sheet 1
A sheet mounting shaft 2; a front-side feeding roller 16 serving as a first feeding unit for feeding the sheet 1; and a front-side recording head 3 serving as a first recording unit disposed at one end of the front-back recording head 20. And a front / back carriage shaft 15 for sliding the front / back recording head 20 in a direction orthogonal to the sheet conveyance direction, and a front platen 13 for holding a sheet at a position facing the front recording head 3.

The recording apparatus 51 has a back side recording section, a back side recording head 7 disposed at the other end of the front and back side recording head 20 for recording on the back side of the sheet, and a sheet facing the back side recording head 7. Back platen 18 as a holding means for holding the, front and back platen 14 as a guide means to sandwich the sheet from the front platen 13 to the back platen 18,
It has a back-side feeding roller 17 as a second feeding means for feeding a sheet from the front-side platen 13 to the back-side platen 18, and a sheet-end mounting shaft 19 for mounting a sheet leading end.

(Operation of the Recording Apparatus 51) The sheet 1 attached to the sheet attaching shaft 2 is fed to the front feeding roller 16 and is conveyed onto the front platen 13. Here, the front side of the sheet is the front side recording head 3 of the front / back side recording head 20 which slides the front / back side carriage shaft 15 in a direction orthogonal to the sheet conveying direction.
Recorded by

The sheet on which the recording on the front surface has been completed is conveyed to the back platen 18 while being guided by the front and back platen 14 by the back feeding roller 17. The leading end of the sheet that has reached the back platen 18 can be manually attached to the sheet end attachment shaft 19 from a groove provided in the back platen 18 and wound around the sheet end attachment shaft 19.

Here, on the back surface of the sheet, information (title name, comment, etc.) relating to the content recorded on the front surface of the sheet by the back recording head 7 of the front and back recording head 20 sliding on the front and back carriage shaft 15 described above. Be recorded.

As described above, the present embodiment is characterized in that it has a front side recording section for recording on the front side of the sheet and a back side recording section for recording on the back side of the sheet. The unit includes a backside recording head 7 for recording on the backside of the sheet, a backside platen 18 for holding the sheet at a position facing the backside recording head 7, and a front and back platen for reliably transporting the sheet onto the backside platen 18.
14 and the back surface feed roller 17 for conveying the sheet on the back platen 18, so that even if the recording surface of the discharged sheet is curled inward, the content recorded on the sheet surface is It can be seen from the side.

Incidentally, the leading end of the sheet reaching the back platen 18 can be manually attached to the sheet end mounting shaft 19 from a groove provided in the back platen 18 and wound around the sheet end mounting shaft 19. Thus, the content recorded on the sheet surface is wound around the inside of the sheet end mounting shaft 19.
With the above mechanism, the phenomenon that the recording surface of the discharged sheet curls inward can be reduced.

Further, since the front and rear recording heads 20 are formed by integrally forming the front recording head 3 and the rear recording head 7,
It becomes a recording means that is easy to assemble.

(Other Embodiments) In the above-described embodiment, the ink jet recording system is used as the recording means. However, an electric current is supplied to the electrothermal transducer according to a recording signal, and the thermal energy applied by the electrothermal transducer is used. It is more preferable that the ink is ejected from an ejection port to perform recording by the growth and shrinkage of bubbles generated in the ink by utilizing film boiling in the ink.

The present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium on which a recording apparatus can record.

Such a recording head may have a configuration satisfying its length by a combination of a plurality of recording heads, or a configuration as a single recording head integrally formed.

In addition, even with the above-mentioned serial type, the recording head fixed to the carriage or mounted on the carriage enables electrical connection with the apparatus main body and supply of ink from the apparatus main body. A replaceable chip-type recording head or a cartridge-type recording head in which an ink tank is provided integrally with the recording head itself may be used.

The type and number of recording heads mounted on the carriage are, for example, not only those provided for one color ink but also a plurality of inks having different recording colors and densities. May be provided in plurality. That is, for example, the printing mode of the printing apparatus is not limited to a printing mode of only a mainstream color such as black, and may be a combination of a plurality of print heads integrally formed. To at least one of the full-color devices.

In addition, in the above-described embodiment, the ink is described as a liquid. However, an ink that solidifies at room temperature or lower and softens or liquefies at room temperature, or an ink jet recording method The ink itself
Generally, the temperature is controlled within the range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in the stable ejection range. Good. In addition, actively prevent the temperature rise due to thermal energy by using the energy of the state change from the solid state of the ink to the liquid state,
Alternatively, an ink that solidifies in a standing state for the purpose of preventing evaporation of the ink is used, and in any case, the ink is liquefied by application of heat energy according to a recording signal, and a liquid ink is discharged, or a recording sheet is used. Can be applied to the case where an ink having a property of being liquefied for the first time by thermal energy, such as one which starts to solidify at the time when the temperature reaches.

Although an example in which an ink jet recording method is used as the above-described recording means has been described, the present invention does not need to limit the recording method to the ink jet recording method. Can be applied to an impact recording method such as a wire dot recording method or other recording methods. Also, there is no need to limit to the serial recording method.

[0033]

As described above, according to the present invention, a surface recording section for recording on the surface of a sheet,
Since the back side of the sheet has a back side recording unit for recording, even if the recording side of the discharged sheet is curled inside, the contents recorded on the sheet surface can be seen from the back side. it can.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a recording apparatus according to a first embodiment.

FIG. 2 is a schematic sectional view of a recording apparatus according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sheet 2 ... Sheet mounting shaft 3 ... Surface recording head 4 ... Surface side carriage shaft 5 ... Horizontal platen 6 ... Horizontal feeding roller 7 ... Back side recording head 8 ... Back side carriage shaft 9 ... Vertical feeding roller 10 ... Vertical platen 11… Discharge roller 12… Platen guide 13… Front platen 14… Front and back platen 15… Front and back carriage shaft 16… Front feed roller 17… Back feed roller 18… Back platen 19… Sheet end mounting shaft 20… Front and back recording Head 50… Recording device 51… Recording device

Claims (5)

[Claims] 1. A recording apparatus having recording means for performing recording on a sheet, the recording apparatus comprising: a front surface recording unit for performing recording on a front surface of the sheet; and a back surface recording unit for performing recording on a back surface of the sheet. And a recording device. 2. The recording apparatus according to claim 1, wherein the back surface recording unit includes: a second recording unit configured to perform recording on a back surface of the sheet; and a holding unit configured to hold the sheet at a position facing the second recording unit. A recording apparatus comprising: guide means for reliably conveying a sheet onto the holding means; and second feeding means for conveying a sheet onto the holding means. 3. The recording apparatus according to claim 1, further comprising: a first recording unit that performs recording on a front surface of the sheet; and a second recording unit that performs recording on a back surface of the sheet. A recording apparatus, wherein the recording means and the second recording means are integrally formed. 4. The printing apparatus according to claim 1, wherein said printing apparatus performs printing by ejecting ink according to a signal. 5. The recording apparatus according to claim 4, wherein in the recording apparatus, a recording unit supplies a current to the electrothermal converter in response to a signal, and discharges ink using thermal energy generated by the electrothermal converter. A recording device, comprising: