JPH08174941A - Image recording device - Google Patents

Abstract

PURPOSE: To record images having proper quality and precision with a simple structure by preventing generation of positional deviation and jam and preventing a device from becoming upsized in its width. CONSTITUTION: An image recording device comprises a first conveyer belt 7 for conveying a material to be recorded by sucking its rear face, a first record means 8 for recording images on the surface of the material to be recorded to be conveyed by the first conveyer belt 7, a second conveyer belt 11 for conveying the material to be recorded by sucking its surface, and a second record means 12 for recording the images on the rear face of the material to be recorded to be conveyed by the second conveyer belt 11. A support roller 16 of the first conveyer belt 7 and a support roller 35 of the second conveyer belt 11 are provided in an arrangement facing each other. One of the support rollers 16 and 35 is connected to a driving section, and a power transmission section is provided at least at each one side end of the support rollers 16 and 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording device used for a printer, a copying machine, a facsimile or an output device of a computer.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 5-185661, the upper surface of a recording material led out from a paper feed cassette is attracted by a first conveying means such as an electrostatic attraction belt. While being conveyed, ink is ejected from the first ink jet recording means arranged facing the first conveying means onto the lower surface of the recording material to record an image, and then the recording material is passed through a relay roller. There is known an image recording apparatus configured to be transferred to an installation portion of the second conveying means.

The above-mentioned image recording apparatus conveys the lower surface of the recording material while adsorbing the lower surface of the recording material by a second conveying means composed of an electrostatic adsorption belt and the like, and is arranged to face the second conveying means. 2 By ejecting ink from the inkjet recording means onto the upper surface of the recording material, an image is recorded on both front and back surfaces of the recording material.

[0004]

In the image recording apparatus having the above-mentioned structure, while the recording material is being conveyed by the first conveying means,
After recording the image on the lower surface, the second
Since the recording material is configured to be transported to the installation portion of the transportation means, when the recording material is transported from the installation portion of the first transportation means to the installation portion of the second transportation means, the recording material There is a problem that positional deviation and jamming are likely to occur and that the quality and accuracy of the image are inevitably reduced due to the change in the transport speed of the recording material.

Further, since the first and second conveying parts and the intermediate roller are installed in series, the lateral width of the image recording apparatus becomes large, and the first ink jet recording means and the second ink jet recording means are provided. Since the ink ejection directions of and are set upside down, there is a problem that a difference in ink ejection pressure occurs due to the action of gravity, and the image quality is likely to deteriorate.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to record an image of proper quality and accuracy while preventing displacement of the recording material and occurrence of jam with a simple structure. It is an object of the present invention to provide an image recording apparatus that can prevent the increase in the lateral width of the apparatus.

[0007]

The invention according to claim 1 is
A first conveyor belt for adsorbing and conveying the back surface of the recording material;
First recording means for recording an image on the surface of the recording material conveyed by the first conveying belt, a second conveying belt for adsorbing and conveying the surface of the recording material, and conveyance by the second conveying belt. Second recording means for recording an image on the back surface of the recording material to be recorded, and the supporting roller of the first conveyor belt and the supporting roller of the second conveyor belt are installed to face each other, and both supporting rollers are provided. One of the two support rollers is connected to the drive section, and a power transmission section is provided on at least one end of each of the support rollers.

According to a second aspect of the present invention, in the image recording apparatus according to the first aspect, the first conveying belt extends along the installation portion of the first recording means, and the first conveying portion. A second transport unit extending in a direction orthogonal to
The first recording section is installed on the conveyor belt while being in contact with the second conveyor section of the first conveyor belt, and is installed opposite to the first conveyor section of the first conveyor belt. And a second transport section extending along the installation section of the means.

According to a third aspect of the present invention, in the image recording apparatus according to the first aspect, the first conveyor belt and the second conveyor belt are respectively installed in the vertical direction, and the lower end portion of the first conveyor belt and the first conveyor belt are provided. (2) The conveyor belt is installed so as to face the upper end of the conveyor belt.

According to a fourth aspect of the present invention, in the image recording apparatus according to any one of the first to third aspects, a drying means is provided on the upstream side of the installation portion of the second conveyor belt.

[0011]

According to the invention described in claim 1, when one of the support rollers of the first conveyor belt and the second conveyor belt is rotationally driven by the drive section, this drive force is applied to the other support roller by the power transmission section. Since both are conveyed to the side, both conveyor belts are driven at a constant speed. And the first
After the recording material is conveyed by the conveyor belt and the image is recorded on the recording material by the first recording unit continuously or alternately, after the image is recorded on the entire surface of the recording material, The recording material is transferred to the installation portion of the second conveyor belt via the installation portions of the both supporting rollers, and the recording material is conveyed by the second conveyor belt and the image is recorded on the recording material by the second recording device. By continuously and alternately performing and, an image is recorded on the entire back surface of the recording material.

According to the second aspect of the invention, the conveyance of the recording material by the first conveying portion of the first conveyor belt and the recording of the image on the recording material by the first recording means are continuous.
Alternatively, by alternately performing the recording of the image on the entire surface of the recording material, the recording material is formed between the second conveyor portion of the first conveyor belt and the first conveyor portion of the second conveyor belt. The image is transferred to the second transport section of the second transport belt through the space, and the image is recorded on the back surface of the recording material in the second transport section.

According to the third aspect of the present invention, while the recording material is conveyed in the vertical direction by the first conveyor belt,
After the image is recorded on the surface of this recording material,
While the recording material is being conveyed in the vertical direction by the second conveyor belt, an image is recorded on the back surface of the recording material.

According to the fourth aspect of the invention, after the image recorded on the surface of the recording material by the first recording means is dried by the drying means, the recording material is placed on the installation portion of the second conveyor belt. Then, the surface of the recording material is adsorbed by the second conveyor belt and conveyed.

[0015]

1 and 2 show an embodiment of an image recording apparatus according to the present invention. This image recording apparatus is composed of a printer for recording character data and the like input from an image reading apparatus (not shown), a paper feed cassette 1 for containing a recording material such as paper or a plastic film, and the paper feed cassette 1 Paper feed roller 2 provided in the mounting portion of the recording medium, a first recording unit 3 for recording an image on the front surface of the recording material fed by the paper supply roller 2, and an image recording on the back surface of the recording material. A second recording portion 4 and a recording material discharging portion 5 are provided.

In the first recording section 3, a pair of upper and lower guide plates 6, a first conveyor belt 7 for conveying the rear surface of the recording material derived from the paper feeding cassette 1 while electrostatically adsorbing the recording material, First recording means 8 for recording an image on the surface of the recording material, first drying means 9 for drying the image recorded on the surface of the recording material by the first recording means 8, and the first recording means 8
And a first cap member 10 that covers the ink ejection nozzles.

In the second recording section 4, a second conveyor belt 11 for conveying while electrostatically adsorbing the surface of the recording material derived from the first recording section 3 and an image on the back surface of the recording material. And a second recording means 12 for recording the second recording means and a second recording means for drying the image recorded on the back surface of the recording material by the second recording means 12.
A drying unit 13 and a second cap member 14 that covers the ink ejection nozzles of the second recording unit 12 are provided.

The first conveyor belt 7 of the first recording section 3 is
A first supporting roller 15 disposed on the downstream side of the guide plate 6, a second supporting roller 16 disposed on the lower downstream side of the first drying means 9, and a lower side of the second supporting roller 16. It is installed in an L-shape by being supported by the third support roller 17 disposed in the above and the fourth support roller 18 disposed near the lower portion of the second support roller 16.

That is, the first conveyor belt 7 includes the first support roller 15, the second support roller 16 and the fourth support roller 15.
A first transport unit 19 supported by a support roller 18 and extending in the horizontal direction, a side of the first transport unit 19 supported by the second support roller 16 and the fourth support roller 18, and a third roller 17. It has the 2nd conveyance part 20 extended below from an edge part.

A drive unit is provided at one end of the second support roller 16 as will be described later, and the second support roller 16 is rotationally driven by the drive unit so that the first transport roller 16 is conveyed. The belt 7 is driven to convey the recording material from the installation portion of the first support roller 15 toward the installation portion of the third support roller 17.

The first recording means 8 has four types of ink jet recording having ink ejection nozzles for ejecting yellow (Y), magenta (M), cyan (C) and black (BK) inks formed on the lower surface thereof. By having the head 21 and ejecting ink downward from the ink ejection nozzles, recording of one line is performed in the main scanning direction of the recording material, and the recording head 21 is moved up and down by the first elevating drive means 22. It is configured to be driven.

The first elevating and lowering drive means 22 has a pair of front and rear rotary shafts 25 and 26 rotatably supported by an upper plate 23 and a lower plate 24 of the machine body, and ascends and descends along the both rotary shafts 25 and 26. It has a pair of front and rear lifting blocks 27 and 28 that are freely supported, and a first drive motor 29 that rotatably drives the rear rotary shaft 26 that is installed on the rear side of the machine body, and has a predetermined upper range of the rear rotary shaft 26. A female screw portion that is screwed into the male screw portion 26 a formed on the rear lifting block 28 is formed.

Then, by driving the rear rotary shaft 26 in the forward or reverse direction by the first drive motor 29,
The lower surface of the inkjet recording head 21 is displaced up and down between a recording position facing the upper surface of the first conveyor portion 19 of the first conveyor belt 7 at a predetermined interval and an upper retracted position described later. ing.

Further, the first drying means 9 has a heating section 30 having a heater wire and a fan 31 for blowing the air heated by the heating section 30 downward, and the first recording means by a support bracket. 8 is attached to the downstream side wall surface.

The first cap member 10 is slidably supported along a screw shaft 32 disposed below the front lifting block 27 and a guide bar 33 disposed below the rear lifting block 28. And the screw shaft 3
2 is screwed in the horizontal direction in accordance with the driving force of a drive motor 34 that drives the rotary drive 2, and is configured to move between a retracted position shown in FIG. 1 and a covering position of an ink ejection nozzle described later.

At the covering position of the first cap member 10, a suction force is generated in the ink discharge nozzle of the ink jet recording head 21 to suck bubbles and foreign matters in the nozzle and guide them to the discharge portion. With
An ejection recovery control unit is provided to prevent clogging of nozzles that are rarely used by returning the meniscus formed at the nozzle tip to a normal position or ejecting ink from all nozzles of the inkjet recording head 21. There is.

The second conveyor belt 11 of the second recording section 4
Is a first support roller 35 disposed above the second support roller 16 of the first conveyor belt 7 so as to face each other, and a second support roller 35 disposed near the outside of the first support roller 35. It is supported by a support roller 36, a third support roller 37 disposed below the second support roller 36, and a fourth support roller 38 installed near the recording material discharge section 5. It is installed in an L shape.

That is, the second conveyor belt 11 is supported by the first support roller 35, the second support roller 36, and the third support roller 37, and extends in the vertical direction. 3 support rollers 37, and a second transport section 40 supported by a fourth support roller 38 and extending horizontally from the lower end of the first transport section 39,
The transport surface of the first transport unit 39 is installed in a state of being in contact with the transport surface of the second transport unit 20 of the first transport belt 7, and the transport surface of the second transport unit 40 is the first transport belt. 7 are installed in parallel so as to face the first transport unit 19.

Further, as shown in FIG. 3, the first conveyor belt 7 and the second conveyor belt 11 are formed so that the width dimension thereof is larger than that of the recording material 41.
The second support roller 16 of the first conveyor belt 7 and the first support roller 35 of the second conveyor belt 11 are connected to each other via both side end portions 42 of 11. Then, the driving force input to the second support roller 16 from the drive unit 43 provided at one end of the second support roller 16 of the first conveyor belt 7 causes the first force to be applied to the first and second end rollers 42. By being transmitted to the support roller 35 side, both the conveyor belts 7, 11
Are configured to be driven at a constant speed.

The second recording means 13 is composed of an ink jet recording head 44 having the same structure as the first recording means 8 and is configured to be moved up and down by the second lifting drive means 45. This second lifting drive means 4
5 is a pair of front and rear elevating blocks 4 supported up and down along the rotary shafts 25 and 26 of the first elevating drive means 22.
6, 47, and a second drive motor 48 for rotationally driving the front rotary shaft 25, and a female screw portion that is screwed to a male screw portion 25a formed in a predetermined lower region of the front rotary shaft 25 is a front portion. It is formed on the elevating block 46.

By rotating the front rotary shaft 25 by the second drive motor 48, the lower surface of the ink jet recording head 44 faces the upper surface of the second conveyor 40 of the second conveyor belt 11 at a recording position. And an up-and-down retracted position, which will be described later, are displaced up and down.

The second drying means 13 has a heating part 49 having a heater wire and a fan 50 for blowing the air heated by the heating part 49 downward, and the second recording means by a support bracket. It is attached to 12 downstream side wall surfaces.

The second cap member 14 is slidably supported along a screw shaft 51 disposed below the front lifting block 46 and a guide bar 52 disposed below the rear lifting block 47. At the same time, in accordance with the driving force of the drive motor 53 that rotationally drives the screw shaft 51, it moves between the retracted position shown in FIG. 1 and the covering position of the ink ejection nozzles, like the first cap member 10. Is configured.

At the covering position of the second cap member 14, a suction force is generated in the ink discharge nozzle of the ink jet recording head 44, so that bubbles and foreign matters in the nozzle are sucked and led out to the discharge portion. With
An ejection recovery controller is provided to prevent clogging of nozzles that are rarely used by returning the meniscus formed at the nozzle tip to a normal position or ejecting ink from all nozzles of the inkjet recording head 44. There is.

A guide plate 54, a pair of upper and lower discharge rollers 55, and a discharge tray 56 are installed in the recording material discharge section 5. Further, on the upper surface of the image recording apparatus, as shown in FIG. 4, an operation panel 57 having a start switch for recording operation and a manual switch for performing ejection recovery operation of the inkjet recording heads 21 and 44 is provided. .

In the above structure, when the image recording apparatus is not in operation, as shown in FIG. 5, the ink jet recording heads 21 and 44 of the first and second recording sections 3 and 4 are respectively raised to the retracted positions, First and second cap members 10,
The ink ejection nozzles of the ink jet recording heads 21 and 44 are covered by the first and second cap members 10 and 14 by advancing 14 to the retracted positions of the ink jet recording heads 21 and 44.

When the start switch of the operation panel 57 is turned on, the ink jet recording head 21,
After slightly raising 44, the screw shafts 32, 51 are rotationally driven by the drive motors 34, 59 to retract the first and second cap members 10, 14 to the lateral retracted positions, and First and second lifting drive means 2
2, 45 by the ink jet recording head 21, 44
From the upper retracted position to the recording position shown in FIG.

Next, the paper feed roller 2 is driven to feed the recording material from the paper feed cassette 1, and the drive section 43 drives the second support roller 16 of the first conveyor belt 7.
Is rotated to operate the first conveyor belt 7 and the second conveyor belt 11 to convey the recording material,
At the same time, the first drying means 9 is operated.

When it is detected by a sensor or the like (not shown) that the recording material conveyed while being attracted to the conveying surface of the first conveyor belt 7 reaches the installation portion of the first recording means 8, The inkjet recording head 21 located on the most upstream side of the first recording unit 8 is operated, and ink of a predetermined color is ejected from the ink ejection nozzles provided on the lower surface of the inkjet recording head 21 in the main scanning direction of the recording material. The image on the first line is recorded.

While the driving section 43 is maintained in the operating state to convey the recording material in the sub-scanning direction, the ink jet recording head 21 is moved to the second row of the recording material at a predetermined timing.
By ejecting ink from the recording material, ejecting the next color ink on the first line of the recording material, or alternately carrying the recording material in the sub-scanning direction and ejecting the ink, A color image is recorded on the entire surface of the recording material.

When the recording material recorded by the first recording means 8 reaches the installation portion of the first drying means 9,
The first drying unit 9 blows hot air onto the ink ejection surface to dry the ink. After that, the recording material is the second conveyor 20 of the first conveyor belt 7,
It is supplied between the second conveyor belt 11 and the first conveyor 39 and is sandwiched by the conveyor surfaces of both conveyor belts 7 and 11, and is guided downward.

The recording material is the second conveyor belt 1.
When reaching the connecting portion between the first transport unit 39 and the second transport unit 40, that is, the lower end of the first transport unit 39, the transport direction of the recording material is changed from the vertical direction to the horizontal direction. , With the back side of the recording material set upward,
It is conveyed to the installation section of the second recording means 12.

Inkjet recording positioned on the most upstream side of the second recording means 12 at the time when the recording material reaches the installation portion of the second recording means 12 is detected by a sensor (not shown) or the like. An image of the first line is recorded in the main scanning direction of the recording material by operating the head 44 and ejecting ink of a predetermined color from the ink ejection nozzles provided on the lower surface thereof.

While the recording material is conveyed in the sub-scanning direction by the driving section 43, ink is ejected from the ink jet recording head 44 on the second line of the recording material, and at the first line of the recording material. A color image is recorded on the entire rear surface of the recording material by, for example, ejecting the next color ink.

When the recording material on which the recording is performed by the second recording means 12 reaches the installation portion of the second drying means 13, hot air is blown onto the ink ejection surface by the second drying means 13. After the ink is dried, it is discharged onto the paper discharge tray 56 by the discharge roller 55.

In this way, with the back surface of the recording material adsorbed by the first conveyor belt 7, the recording material is transferred to the first recording medium.
The recording medium 8 is conveyed to the installation portion, the ink is ejected on the surface thereof, and the recording material is installed on the second recording means 12 while the surface of the recording material is adsorbed by the second conveyor belt 11. Since the ink is ejected to the back surface of the recording material after being conveyed to the sheet, images can be recorded on both the front and back surfaces of the recording material.

Then, the second support roller 16 located in the middle of the first conveyor belt 7 and the second conveyor belt 1
The first support roller 35 located at the upper end of the first support roller 35 is installed to face each other, and between the second support roller 16 and the first support roller 35, the first and second conveyor belts 7 and 11 are provided. Since the power transmission unit including the both side end portions 42 is provided, the driving force input from the driving unit 43 is applied to one of the both support rollers 16 and 35, that is, the second support roller 16 of the first conveyor belt 7. The two conveyor belts 7 and 11 can be driven at a constant speed by transmitting them to the second conveyor belts 7 and 11, respectively.

Therefore, with a simple structure, the first conveying section 19 of the first conveying belt 7 to the second conveying section 20 of the first conveying belt 7 can be operated without causing positional deviation or jam of the recording material. The recording material can be transferred to the second conveyor 40 of the second conveyor belt 11 via the first conveyor 39 of the second conveyor belt 12, and the conveyor speed of the recording material can be kept constant. High-quality images can be recorded.

Further, as described above, the first conveyor belt 7 is provided with the first conveyor section 19 extending in the horizontal direction and the second conveyor section 20 extending in the vertical direction, and the second conveyor belt 11 is provided.
Since the first transporting section 39 extending in the vertical direction and the second transporting section 40 extending in the horizontal direction are provided in the first transporting section 1,
The first recording means 8 installed to face 9 and the second recording means 12 installed to face the second transport section 40 are arranged so as to overlap in the width direction of the image recording apparatus. As a result, the width dimension of the device can be reduced.

Moreover, the rotary shafts 25 and 26 constituting the lifting drive means 22 of the first recording means 8 and the second recording means 1
By commonly using the rotary shafts 25 and 26 constituting the two lifting drive means 45, the lifting drive means 22 and 45 can be made compact and the structure thereof can be simplified.

Further, by arranging the first conveying section 19 of the first conveying belt 7 and the second conveying section 40 of the second conveying belt 11 so as to face each other, the ink application surface applied to the recording material. Since the ink jet recording heads 21 and 44 are respectively set to face upward and are conveyed to the installation portion of the ink jet recording heads 21 and 44, due to the action of gravity as in the conventional apparatus in which the ink application surface is set upside down. As a result, there is no difference in the pressure of the ink ejected from the inkjet recording heads 21 and 44, and it is possible to record an image of appropriate quality.

Further, as described above, the first drying means 9 is disposed on the upstream side of the installation portion of the second conveyor belt 11, that is, on the downstream side of the first conveyor portion 19 of the first conveyor belt 7, Since the ink ejected onto the surface of the recording material is heated and dried by the first drying means 9, when the recording material is transferred to the installation portion of the second conveyor belt 11,
It is possible to reliably prevent the occurrence of a situation in which the ink adheres to the transport surface.

Further, in the above embodiment, the second recording means 12
Since the second drying means 13 is disposed on the downstream side wall surface of the recording medium and the ink ejected on the back surface of the recording material is heated and dried by the second drying means 13, the recording material is discharged. It is possible to reliably prevent the ink from adhering to the discharge roller 55 or the like when discharged to the portion 5.

In order to prevent the thermal influence of the drying means 9 and 13 from affecting the ink jet recording heads 21 and 44, the recording material is conveyed near the installation portion of the drying means 9 and 13. It is desirable to configure the drying means 9 and 13 to be activated when is confirmed, but the drying means 9 and 13 are activated immediately after the start switch of the image recording apparatus is turned on. You may.

In the above embodiment, an example in which the recording material is conveyed while being electrostatically attracted to the conveying surfaces of the first and second conveyor belts 7 and 11 has been described. , The second conveyor belts 7, 11 are made of a material having air permeability such as a mesh material, and the conveyor belts 7,
A suction means is provided on the back side of 11, and air is sucked by this suction means to suck the ink on the recording surface and convey the recording material while drying the ink discharged onto the recording material. It may be configured so as to allow it.

Further, as shown in FIG. 3, the width dimensions of the first and second conveyor belts 7 and 11 are set to be larger than the width dimension of the recording material 41, and both side end portions of both conveyor belts 7 and 11 are set. Four
In place of the above-mentioned configuration in which the driving force is transmitted to both the conveyor belts 7 and 11 via 2, the large diameters are provided on both right end portions of the first and second conveyor belts 7 and 11 as shown in FIG. Bulge 57
May be provided, and the driving force input from the drive unit 43 to the second support roller 16 may be transmitted to the first support roller 35 side by the power transmission unit including the bulging portion 57.

In this case, the surface of the bulging portion 57 provided at the side end portions of the both supporting rollers 16 and 35 is knurled to increase the friction coefficient of the power transmitting portion and transmit the driving force. It is desirable to configure so as to eliminate loss.

It should be noted that a structure may be provided in which a drive unit for rotationally driving the first support roller 35 of the second conveyor belt 11 is provided and a power transmission unit for transmitting this driving force to the first conveyor belt 7 side is provided. Good. Further, the power transmission portion does not necessarily have to be provided at both side end portions of the both support rollers 16 and 35, and may be provided at one side end portions of both support rollers 16 and 35.

Further, the shapes and installation positions of the first conveyor belt 7 and the second conveyor belt 11 are not limited to those in the above embodiment, and various modifications are possible, for example, FIG.
As shown in FIG. 1, a first conveyor belt 60 whose upper and lower ends are supported by first and second support rollers 58 and 59, and a second conveyor belt 60 whose upper and lower ends are supported by first and second support rollers 61 and 62 The conveyor belt 63 is installed in the vertical direction, and the second support roller 59 that supports the lower end of the first conveyor belt 60 and the first support roller 61 that supports the upper end of the second conveyor belt 63 are provided. The configuration may be such that they are installed opposite to each other.

According to the above construction, the image recording and the ink drying by the first recording means 64 and the first drying means 65 provided on the installation portion of the first conveyor belt 60, and the installation portion of the second conveyor belt 63. Since the image recording and the drying by the second recording unit 66 and the second drying unit 67 provided in the above are continuously performed, the time required for recording the image can be shortened. Moreover, the first and second recording means 6
Since the ink ejection directions of 4 and 66 are respectively set to the horizontal direction, the occurrence of a situation where the ink ejection pressures differ due to the action of gravity is effectively prevented with a simple configuration. be able to.

In the above embodiment, the ink jet recording head 2 which is a line type recording head for recording an image of one line in the main scanning direction of the recording material by one recording operation.
Although the image recording apparatus having the recording units 1 and 44 has been described, the image recording apparatus having the recording unit including the serial type recording head that records the image while moving the recording unit in the main scanning direction of the recording material is also included in the present invention. Configurations can be applied.

Further, the present invention can be applied to an image recording apparatus having a wire dot recording means, a laser beam recording means, and a thermal transfer recording means.

[0063]

As described above, according to the first aspect of the invention, the recording material is conveyed to the installation portion of the first recording means while the back surface of the recording material is adsorbed by the first conveying belt. Then, an image is recorded on the surface and the second
With the surface of the recording material adsorbed by the conveyor belt,
Since this recording material is configured to be conveyed to the installation portion of the second recording means and an image is recorded on the back surface thereof, images can be recorded on both front and back surfaces of the recording material.

Since the supporting roller for supporting the first conveyor belt and the supporting roller for supporting the second conveyor belt are installed to face each other, and the power transmission section is provided between the both supporting rollers, The driving force input from the drive unit to one of the both support rollers can be transmitted to the both conveyor belts to drive both conveyor belts at a constant speed. Therefore, it is possible to remove the recording material from the installation portion of the first conveyor belt to the second portion without causing the positional deviation or jam of the recording material.
There is an advantage that the recording material can be transferred to the installation portion of the conveyor belt, and a high-quality image can be recorded while keeping the conveying speed of the recording material constant.

According to a second aspect of the present invention, the first conveyer belt extends along the installation portion of the first recording means on the first conveyer belt, and the second conveyer member extends in a direction orthogonal to the first conveyer portion. And a first section installed on the second conveyor belt in contact with the second conveyor section of the first conveyor belt.
Since the transporting section and the second transporting section extending to face the first transporting section of the first transporting belt are provided, it is possible to dispose both the recording means without increasing the width dimension of the image recording apparatus. Further, a first conveyor of the first conveyor belt,
By arranging the second conveying belt and the second conveying portion so as to face each other, the recording material is conveyed to the installation portion of the first and second recording means with the ink application surfaces of the recording material set in the same direction. Therefore, in the image recording apparatus having the ink jet recording head, there is a difference in the ink ejection pressure due to the action of gravity as in the conventional apparatus in which the ink ejection surface is set upside down. There is an advantage that an image of appropriate quality can be recorded.

According to a third aspect of the present invention, the first conveyor belt and the second conveyor belt are respectively installed in the vertical direction, and the lower end portion of the first conveyor belt and the upper end portion of the second conveyor belt are provided. Since they are installed opposite to each other, recording of an image by the first recording means provided on the installation portion of the first conveyor belt and recording of an image by the second recording means provided on the installation portion of the second conveyor belt are performed. There is an advantage that it can be performed continuously and quickly, and the width dimension of the image recording apparatus can be further reduced.

In addition, in the image recording apparatus having the ink jet recording head, the ink ejection directions of the first and second recording means are set to the horizontal direction, respectively, so that the ejection of ink is caused by the action of gravity. It is possible to effectively prevent a difference in pressure with a simple configuration.

According to a fourth aspect of the present invention, a drying means is provided on the upstream side of the installation portion of the second conveyor belt, and the ink ejected onto the surface of the recording material is heated by the drying means. Since the recording material is configured to be dried, there is an advantage that it is possible to reliably prevent the occurrence of a situation in which the ink adheres to the transport surface when the recording material is transported to the installation portion of the second transport belt.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of an image recording apparatus according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a perspective view showing the outer appearance of the image recording apparatus.

FIG. 5 is an explanatory diagram showing a non-operating state of the image recording apparatus.

FIG. 6 is a view corresponding to FIG. 3, showing another example of the power transmission unit.

FIG. 7 is an explanatory diagram showing another embodiment of the image recording apparatus according to the present invention.

[Explanation of symbols]

 7,60 First conveyor belt 8,64 First recording means 9,13,65,67 Drying means 11,63 Second conveyor belt 12,66 Second recording means 16,35,59,61 Support roller 19 First conveyor First conveyor section of belt 20 Second conveyor section of first conveyor belt 39 First conveyor section of second conveyor belt 40 Second conveyor section of second conveyor belt 41 Recording material 42 Both ends of conveyor belt (power transmission Part) 43 drive part 57 swelling part of support roller (power transmission part)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI technical display location B41J 13/08 B65H 5/02 W (72) Inventor Koichi Baba 1-2-2 Tamatsukuri, Chuo-ku, Osaka City No. 28 Mita Engineering Co., Ltd. (72) Inventor Yoshiko Uryu 1-2-2 Tamatsukuri, Chuo-ku, Osaka City Mita Engineering Co., Ltd. (72) Setsuo Hori 1-228 Tamatsukuri, Chuo-ku, Osaka City Within Mita Engineering Co., Ltd.

Claims (4)

[Claims] 1. A first device for adsorbing and conveying a back surface of a recording material.
A conveyor belt, a first recording device for recording an image on the surface of the recording material conveyed by the first conveyor belt, and a second conveyor belt for adsorbing and conveying the surface of the recording material.
A second recording means for recording an image on the back surface of the recording material conveyed by the second conveyor belt, and the support roller of the first conveyor belt and the support roller of the second conveyor belt are opposed to each other. The image recording apparatus is characterized in that one of the both support rollers is connected to a drive section, and a power transmission section is provided at least at one end of each of the both support rollers. 2. The first conveyor belt is provided with a first conveyor portion extending along an installation portion of the first recording means and a second conveyor portion extending in a direction orthogonal to the first conveyor portion, and a second conveyor is provided. A first conveying section installed on the belt in contact with the second conveying section of the first conveying belt; and a first recording section of the first conveying belt facing the first conveying section, and a second recording unit. The image recording apparatus according to claim 1, further comprising: a second transport unit that extends along the installation unit. 3. A first conveyor belt and a second conveyor belt are installed in a vertical direction, respectively, and a lower end of the first conveyor belt and an upper end of the second conveyor belt are opposed to each other. The image recording apparatus according to claim 1. 4. The image recording apparatus according to claim 1, further comprising a drying device disposed upstream of the installation portion of the second conveyor belt.