JP2001106377A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a reverse rotation and a conveying of a thick and rigid paper such as a post card. SOLUTION: An applying force of an intermediate roller 23 at a center portion in a width direction of paper corresponding to a conveying roller 15 and a tip end roller 24 is made higher than that of the intermediate roller 23 at the other portion and the tip end roller 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and more particularly to a recording apparatus capable of transporting a sheet along a reverse transport path.

[0002]

2. Description of the Related Art In general, an ink jet recording apparatus as a recording apparatus used for an image recording apparatus (image forming apparatus) such as a printer, a facsimile, a copying machine, etc. has a plurality of nozzles for ejecting ink droplets, and a plurality of nozzles. Using an inkjet head equipped with a correspondingly provided actuator such as an electromechanical transducer and a heating resistor as a printhead, ink droplets are ejected from nozzles of the printhead in response to print signals while transporting fed paper. Is discharged onto a sheet to record an image, and the recorded sheet is discharged to a discharge tray. In the present specification, “paper” means that ink droplets are attached, and is not limited to paper but includes OHP sheets and the like.

[0003] Since such an ink jet recording apparatus can perform good printing irrespective of the paper thickness and the like, it is required to be applicable to a wide range of paper sizes, thicknesses, and the like. It has become.

[0004] By the way, the transport system in the ink jet recording apparatus is roughly classified from the aspect of the transport path. For example, as described in Japanese Patent Application Laid-Open No. 7-68871, paper loaded from the rear is fed and Is transported to the front side by a transport roller, is sent to a portion where image recording is performed by a recording head (printing section), and is discharged as it is to the front side (hereinafter, referred to as a “linear transport path method”), and is stacked from behind. The fed sheet is fed, the sheet is substantially reversed (turned) by a conveying roller, and then sent to a printing section by a recording head and discharged again to the rear side (hereinafter, referred to as a “reverse conveying path method”). There is.

Further, in such an ink jet recording apparatus, when a sheet passing through a printing section is conveyed in a paper discharging direction, if a roller is applied to the printing surface side of the sheet, undried ink adheres and paper For example, as described in the above publication, a plurality of driven paper discharge rollers made of rubber or the like are intermittently arranged in the main scanning direction on the downstream side of the head in the paper transport direction, and the paper A plurality of spur rollers (also simply referred to as "spurs") that rotate with the paper being sent while being in contact with the printing surface are provided opposite to each paper discharge roller, and the paper is spun by these paper discharge rollers and the spur. In some cases, the sheet is nipped and sent out in the sheet discharge direction. In this case, the plurality of spurs are housed and held in a holder as described in the above-mentioned publication, and are fixed to a discharge guide member or the like.

[0006]

Of the two transport systems described above, in the former linear transport path system, since the paper is transported substantially linearly, there is no need to bend the paper, and It has the advantage that strong postcards can be transported stably, but the tray or cassette for stocking stacked paper and the tray for stocking ejected paper must be arranged before and after the main body of the printing apparatus. There is a problem that the installation (projection) area of the entire apparatus becomes large and space cannot be saved. This problem arises even in a recording apparatus that employs the latter reverse transport path method and adopts the linear transport path method for strong paper such as postcards (only so-called manual sheet feeding is possible). It is.

On the other hand, in the latter reverse conveyance path system, a tray or a cassette for storing stacked papers and discharged papers can be vertically arranged in the same direction. There is an advantage that the installation (projection) area of the recording device can be reduced and space can be saved.

However, in such a reversing path conveying type recording apparatus, it is desirable that the conveying roller has a diameter as small as possible in order to suppress the size of the apparatus. When a thick sheet or a stiff sheet is conveyed, it is necessary to convey and turn the sheet against the lumbar of the sheet at a turn section (conveying roller section), so that a higher conveying force is required. For example, in the case of an ink jet recording apparatus, it is desired that a large amount of postcards can be fed from a cassette or a tray, regardless of the thickness of a standard size sheet of a cassette set to about 90 g / m ² .

For this reason, it is necessary to set the conveying force of the turn section high so that the sheet can be conveyed even with a postcard equivalent thickness. As a result, the driving load increases, and further the cost increases due to the increase in the specification of the driving motor. The problem of increasing occurs.

In the case where a narrow roller is used in the paper discharge path, such as the spur of the above-described ink jet recording apparatus, the pressure of the roller should be as low as possible, and the paper (especially OHP or other ink drying property) should be used. Rolls are prevented from sticking on the printing surface of (bad paper), but when conveying thick and thick paper such as postcards, a high conveying force is required. Then, there arises a problem that roller marks are attached to the printing surface.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and one object of the present invention is to provide an ink jet recording apparatus capable of conveying thick paper or stiff paper while suppressing an increase in driving load. The purpose is to: Another object is to provide a recording apparatus capable of discharging thick paper or stiff paper while reducing roller traces.

[0012]

In order to solve the above-mentioned problems, a recording apparatus according to the present invention has a structure in which the conveying force of a conveying roller for conveying a sheet is higher at a central portion in the sheet width direction than at other portions. Things.

Here, a plurality of pressure rollers facing the transport roller are arranged in the paper width direction, and the pressure of the pressure roller facing the central portion of the transport roller in the paper width direction is reduced by the pressure of another pressure roller. By making it higher, the conveying force can be made higher. For example, an urging unit that applies an urging force to the conveying roller side is provided to each of the plurality of pressing rollers, and the urging unit of the pressing roller facing the center portion of the conveying roller in the sheet width direction is more than the other urging units. By locking at a high mounting position, the conveying force can be increased. In this case, it is preferable that the pressure of the pressure roller facing the central portion of the transport roller in the paper width direction can be made equal to the pressure of other pressure rollers.

Alternatively, a plurality of pressure rollers facing the transport roller are arranged in the paper width direction, and the surface friction coefficient of the pressure roller facing the central portion of the transport roller in the paper width direction is changed to the surface of another pressure roller. By making the friction coefficient higher than the friction coefficient, the conveying force can be increased.

In the recording apparatus according to the present invention, the conveying force of the rollers that can contact the sheet at the downstream side of the recording means is configured such that the central portion in the sheet width direction is higher than other portions.

Here, by arranging a plurality of rollers capable of contacting the sheet in the sheet width direction and increasing the arrangement density of the rollers at the central portion in the sheet width direction, the conveying force can be increased.

Further, in the recording apparatus according to the present invention, the transporting force of the transporting roller for transporting the sheet is higher at the end face side portion than at other portions.

Further, in the recording apparatus according to the present invention, the conveying force of the rollers that can contact the sheet on the downstream side of the recording means is configured such that the portion on the end face side is higher than the other portions.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a mechanism section of an ink jet recording apparatus which is a recording apparatus according to the present invention,
2 is an enlarged schematic side view of the main part of FIG. 1, FIG. 3 is an enlarged view of the main part of FIG. 2, FIG. 4 is a plan view of the upper discharge guide member of FIG. 1, and FIG. 6, FIG. 6 is an enlarged view of a main part of FIG. 4, and FIG. 7 is an enlarged sectional view of a main part of FIG.

First, the outline of the printing mechanism will be described. A main support guide rod 3 and a sub support guide rod 4 are suspended between side plates 1 and 2 in a substantially horizontal positional relationship. The carriage 5 is slidably supported in the main scanning direction by the guide rod 3 and the sub-support guide rod 4.
On the lower surface side of the carriage 5, four recording heads 6 serving as recording means for respectively discharging yellow (Y) ink, magenta (M) ink, cyan (C) ink, and black (Bk) ink are ejected. The surface (nozzle surface) 6a is mounted downward, and
Each color ink cartridge 7 for supplying each color ink to the recording heads 6 is exchangeably mounted.

The carriage 5 is connected to a timing belt 11 stretched between a driving pulley (drive timing pulley) 9 rotated by a main scanning motor 8 and a driven pulley (idler pulley) 10 so that the main scanning motor 8 to control the carriage 5, that is, the four heads 6
Are moved in the main scanning direction.

Also, sub-frames 13 and 14 are erected on a bottom plate 12 connecting the side plates 1 and 2 and
A transport roller 15 for feeding a sheet 16 in a sub-scanning direction orthogonal to the main scanning direction is rotatably held between the rollers 3 and 14. The sub-scanning motor 17 is provided on the side of the sub-frame 14.
And the rotation of the sub-scanning motor 17 is
5, a gear 18 fixed to the rotation shaft of the sub-scanning motor 17 and a gear 19 fixed to the shaft of the transport roller 15.
And

Here, as shown in FIG.
Reference numeral 5 denotes a sheet 16 set in a sheet cassette 21, and the sheet 16 fed by a sheet feed roller 22 for feeding the sheet 16 is inverted and conveyed. An intermediate roller 23 and a tip roller 24 which are pressure rollers for turning (reversing) along the surface are provided.

The intermediate roller 23 and the tip roller 24 are rotatably held in a pressure roller bracket 25. The pressure roller bracket 25 is divided into three in the paper width direction (direction orthogonal to the paper conveyance direction = main scanning direction) (hereinafter, the pressure roller bracket 25 at the center in the paper width direction is referred to as “25A”). Each of the pressure roller brackets 25 at the left and right ends in the paper width direction is denoted as “25B”.), And each of the pressure roller brackets 25A and 25B is capable of swinging at a swing fulcrum 27 in contact with the fixed portion 26.

Then, each press roller bracket 25A, 2
A locking member 30 attached to the rear end of the 5B and the fixing portion 26,
The springs 28 and 29, which are elastic members, are interposed as urging means for urging the intermediate roller 23 and the tip roller 24 toward the conveyance roller 15 between the pressure roller bracket 31 and the pressure roller brackets 25A and 25B in FIG. Is urged to swing clockwise.

Here, the urging force on the pressure roller bracket 25A disposed at the center portion in the paper width direction can be made larger than the urging force on each pressure roller bracket 25B disposed on both right and left sides in the paper width direction. Thereby, the pressing force of the intermediate roller 23 and the tip roller 24 arranged at the center portion in the sheet width direction can be made larger than the pressing force of the intermediate roller 23 and the tip roller 24 arranged at both left and right portions in the sheet width direction. The conveying force at the central portion in the sheet width direction can be made higher than the conveying force at other portions.

That is, the locking member 30 for locking the spring 28 of the pressure roller bracket 25A is a locking member 3 for locking the spring 29 of each pressure roller bracket 25B.
The height position is higher than 1. Thus, even when substantially the same springs are used as the springs 28 and 29, the pressing force of the intermediate roller 23 and the tip roller 24 disposed in the central portion in the sheet width direction is reduced by the intermediate roller 2 disposed in other portions.
3 and the pressing force of the tip roller 24.

In this case, the height of the locking member 30 of the pressure roller bracket 25A can be changed, so that the intermediate roller 23 and the tip roller 2 disposed at the central portion in the sheet width direction are provided.
The pressing force of No. 4 can be selected to be equal to the pressing force of the intermediate roller 23 and the tip roller 24 arranged in other portions. The change of the height position of the locking member 30 can be performed by, for example, a lever.

The spring 28 is used as the spring 28.
9, the intermediate roller 23 and the tip roller 24 which are arranged at the central portion in the paper width direction and the pressing force of the tip roller 24 are arranged at other portions even if the height position of the locking is the same. The pressure can be higher than the pressing force of the tip roller 24.

Further, by making the surface friction coefficient of the intermediate roller 23 and the tip roller 24 arranged in the central portion in the sheet width direction higher than the surface friction coefficient of the intermediate roller 23 and the tip roller 24 arranged in other parts, the conveyance is also possible. The conveying force of the roller 15 at the central portion in the sheet width direction can be increased.

Next, in the ink jet recording apparatus, a print receiving member 34 for guiding the sheet 16 fed from the transport roller 15 below the recording head 6 in accordance with the moving range of the carriage 5 in the main scanning direction. Has been arranged.

The printing receiving member 34 has a length corresponding to the moving range of the carriage 5 in the printing area in the main scanning direction, and has a cross section formed by forming a plurality of ribs 35 at predetermined intervals in the main scanning direction. A substantially U-shaped holding member (bracket) 36
It is fixed to. The paper 16 is guided while being in contact with the uppermost surface of the rib 35, so that the distance between the recording head 6 and the surface (printing surface) of the paper 16 is defined.

A first discharge roller 37 which is driven to rotate the paper 16 in the paper discharge direction and a paper discharge tray 39 are provided downstream of the printing receiving member 34 in the paper transport direction. A second discharge roller 38 and a discharge tray 39 mounted in an inclined state for storing the discharged paper 16
And are arranged.

Further, the first and second discharge rollers 3
A lower discharge guide member 41 and an upper discharge guide member 42 that form a transport path for guiding the discharged paper 16 corresponding to the sheets 7 and 38 are provided. These lower discharge guide members 4
1 and the upper discharge guide member 42, an appropriate amount (usually 1 to 3 m) is set in order to suppress fluttering of the conveyed sheet.
m) must be secured.

Then, a plurality of first spurs 4 which are first upper discharge pressure rollers in the main scanning direction corresponding to the first discharge rollers 37.
And a second spur group 46 composed of a plurality of second spurs 44, which are second upper ejection pressure rollers, in the main scanning direction corresponding to the second ejection rollers 38. Has been established. Both the first spur 43 and the second spur 44 are rotatably held by the upper discharge guide member 42.

That is, referring to FIGS. 3 to 6, the upper discharge guide member 42 has nine first spurs 43 (one of which is the first spur group 35) on the upstream side in the sheet discharge direction. (Two spurs) are rotatably held in the sheet width direction, and the five second spur groups 46 constituting the second spur group 46 on the downstream side in the sheet discharging direction.
The spur 44 (one spur is composed of two spurs) is held rotatably in the sheet width direction.

Here, as schematically shown in FIG.
The nine first spurs 43 constituting the spur group 35 are arranged at a higher density in the central portion in the paper width direction, that is, five spurs are arranged in a postcard width area, and other parts (areas) are used here. There are four in total, two on each side. Similarly, the five second spurs 44 constituting the second spur group 46 are arranged at a high density in the central portion in the paper width direction, that is, three spurs 44 are arranged in the postcard width area here. Left and right 1 of area (area)
Two pieces are arranged for each piece. As a result, the conveying force is higher in the central portion in the sheet width direction than in other portions.

The first spur 43 and the second spur 44
Is rotatably inserted between the shaft portions 47, 47 and 48, 48 between the ribs 49, 49 formed on the upper sheet discharge guide member 42, and a leaf spring 50, which is an elastic member, is disposed between the two spurs. Pressurized downward. These first spur 43 and second spur 43
The leaf spring 50 for pressing the spur 44 is the same member,
The orientation is changed by 0 ° and fixed by the claw member 51. By using the same elastic member for pressing the first spur 43 and the second spur 44 as described above, it is possible to reduce the cost and eliminate erroneous mounting of the elastic member, thereby improving workability.

Referring to FIGS. 2 and 3, the upper discharge guide member 42 has a closed position shown by the solid line and an open position shown by the imaginary line with the rotation center position of the second discharge roller 38 as the rotation center. It is arranged to be able to swing between and. Further, a spacer member 5 serving as a gap defining member for defining a gap between the lower discharge guide member 41 and the upper discharge guide member 42 is provided outside the maximum width of the usable paper.
2 are provided.

The spacer member 52 can be formed integrally with the lower discharge guide member 41 or the upper discharge guide member 42. Thus, by providing the gap defining member for defining the gap between the lower discharge guide member 41 and the upper discharge guide member 42, the upper discharge guide member 4 is provided.
Even when the opening 2 is configured to be open, a reliable gap can be easily secured. Note that the upper discharge guide member 42
, The workability of assembling the upper discharge guide member 42 is improved.

In the recording apparatus thus configured, the sheet 16 sent out from the sheet feeding tray 21 by the sheet feeding roller 22 is sent out after being reversed by the intermediate roller 23 and the tip roller 23 along the conveying roller 15. Is guided along the inclined surface of the rib 35, and then the back surface of the sheet 16 is guided while being in contact with the uppermost surface of the rib 35, so that the distance between the recording head 6 and the recording head 6 is defined. The required image is recorded by ejecting the ink droplets.
Then, the printed sheet 16 is fed into the gap between the upper discharge guide member 42 and the lower discharge guide member 41, and is discharged and conveyed by the first and second discharge rollers 37 and 38 to discharge the paper. It is stacked on the tray 39.

Here, the intermediate roller 2 at the central portion in the sheet width direction is used.
3 and the pressure of the tip roller 24 is increased, and
By increasing the transport force at the center in the paper width direction,
When the paper 16 is transported on the basis of the center, even if the paper 16 is a thick paper such as a postcard or a stiff paper, the transport rollers 15 may be used.
And it becomes possible to convey it in reverse. In this case, since the conveying force is increased only in the necessary area, the driving load is not unnecessarily increased, and the cost and the noise can be reduced.

In this case, when a wide sheet of A3 size or the like is passed, a slight skew may occur due to pressure imbalance when the trailing end of the sheet passes through the leading end roller 24. Since the paper skew is suppressed by the tip roller 24, there is no direct effect on the image. In addition,
Since the tip roller 24 has a higher conveying force than the spur group,
No skew occurs due to spurs.

However, as described above, the pressure roller (intermediate roller 23) facing the central portion of the transport roller 15 in the paper width direction is used.
In addition, by making it possible to change the pressing force of the front end roller 24), it is possible to prevent a sheet skew resulting from the left-right balance of the pressing force when a normal wide sheet is conveyed.

When the paper is conveyed on the basis of the end face, the pressure of the pressure roller facing the conveyance roller 15 on the end face side may be higher than the pressure of other parts or the surface friction coefficient may be increased. I just need.

Further, the sheet 16 having passed through the printing unit is rotated by a first spur group 45 which is rotatably held by the upper sheet ejection guide member 42.
The first spur 43 and the second spur 44 of the second spur group 46 press the upper surface of the sheet 16 while being rotated by the conveyed sheet 16, so that the fluttering of the sheet 16 is suppressed.

Here, as described above, the first spur 43 of the first spur group 45 and the second spur 44 of the second spur group 46 increase the arrangement density of the central portion in the sheet width direction to increase the conveying force. Therefore, when the paper 16 is transported on the basis of the center, even a thick paper such as a postcard or a stiff paper can be transported with a high transport force without increasing the pressing force of each spur. Therefore, even when normal paper or paper with poor ink permeability such as OHP is used, the occurrence of spur marks can be reduced.

When a paper jam or the like occurs during paper discharge, the first spur 43 of the first spur group 45 is separated from the first paper discharge roller 37 by opening the upper paper discharge guide member 42 to the open position. Therefore, the paper 16 on which the jam has occurred can be easily taken out and removed. In this case, an open configuration can be constructed with a simple configuration by applying an existing roller shaft by setting the swing fulcrum of the upper discharge guide member 42 as the rotation center of the discharge roller. If the rotation center (oscillation fulcrum) of the upper paper ejection guide member 42 is provided in addition to the rotation center of the first paper ejection roller 37 or the second paper ejection roller 38, the upper paper ejection guide member 42 is set to the open position. Accordingly, both the first spur 43 and the second spur 44 can be separated from the first and second paper discharge rollers 37 and 38.

Further, the first spur 43 of the first spur group 45 and the second spur 44 of the second spur group 46 are provided on the upper discharge guide member 42.
Are held rotatably, so that the first spur 43 and the second spur 43
The assembly is completed by assembling the spurs 44 directly to the upper discharge guide member 42, the spurs can be easily assembled, and the spurs 44 are directly assembled to the upper discharge guide member 42. Becomes easier.

In the above embodiment, the present invention is applied to an ink jet recording apparatus which conveys a sheet on the basis of a center. Although the example in which the conveying force at the center in the direction is increased has been described, the present invention can be similarly applied to an ink jet recording apparatus that conveys a sheet on the basis of an end face. It is only necessary to increase the force, or to increase the conveying force at the end face side in the sheet width direction also on the sheet discharging side.

In the above-described embodiment, the example in which a plurality of (several rows) spur groups are provided has been described. However, the present invention can be similarly applied to an ink jet recording apparatus in which a plurality of spurs are provided in one row. A simple roller other than a spur (including a roller) may be used as the upper discharge pressure roller. Furthermore, in the above embodiment, an example in which the present invention is applied to an ink jet recording apparatus using an ink jet head as a recording unit has been described, but the present invention is not limited to the ink jet recording apparatus, and other recording heads such as a thermal head And a printer, a copying machine, a facsimile machine, and the like using a laser for a writing unit (recording means).

[0052]

As described above, according to the recording apparatus of the present invention, the transporting force of the transporting rollers for transporting the paper is configured such that the central portion in the width direction of the paper is higher than the other portions. In addition, it is possible to convey a thick sheet or a stiff sheet while avoiding an increase in the cost and reducing the cost and the noise.

Here, a plurality of pressure rollers facing the transport roller are arranged in the paper width direction, and the pressure of the pressure roller facing the central portion of the transport roller in the paper width direction is reduced by the pressure of another pressure roller. By making the height higher, the conveying force can be increased with a simple configuration.

Further, an urging means for applying an urging force to the conveying roller side is provided for each of the plurality of pressing rollers, and the urging means of the pressing roller facing the central portion of the conveying roller in the sheet width direction is set to another urging means. By locking at a higher mounting position than the means,
The conveying force can be increased while using the same urging means. In this case, it is possible to prevent the paper skew during normal paper transport by making the pressure of the pressure roller facing the central part of the transport roller in the paper width direction equal to the pressure of other pressure rollers. it can.

Alternatively, a plurality of pressure rollers facing the conveyance roller are arranged in the paper width direction, and the surface friction coefficient of the pressure roller facing the center portion of the conveyance roller in the paper width direction is changed to the surface of another pressure roller. By making the friction coefficient higher than the friction coefficient, the conveying force can be increased with a simple configuration.

According to the recording apparatus of the present invention, the conveying force of the rollers that can contact the sheet at the downstream side of the recording means is configured such that the central portion in the sheet width direction is higher than the other portions, so that the sheet has a large thickness. Paper and stiff paper can be discharged, and roller traces can be reduced.

Here, by arranging a plurality of rollers capable of contacting the sheet in the sheet width direction and increasing the arrangement density of the rollers at the central portion in the sheet width direction, the pressing force can be increased with a simple configuration without increasing the pressing force. The transfer force can be increased.

Further, according to the recording apparatus of the present invention,
The transporting force of the transporting rollers for transporting the paper is higher at the end face side than at the other parts.Thus, avoiding an increase in the driving load, cost reduction and noise reduction, while thick paper and Paper can be transported.

Furthermore, according to the recording apparatus of the present invention, since the transporting force of the rollers that can contact the sheet downstream of the recording means is configured such that the portion on the end face side is higher than the other portions, it is thick. Paper and stiff paper can be discharged, and roller traces can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a mechanism section of an ink jet recording apparatus which is a recording apparatus according to the present invention.

FIG. 2 is an enlarged schematic side view of a main part of FIG. 1;

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a plan view of the upper paper ejection guide member of FIG. 1;

FIG. 5 is an explanatory view of the arrangement of the spur in FIG. 4;

FIG. 6 is an enlarged view of a main part of FIG. 4;

FIG. 7 is an enlarged sectional view of a main part of FIG. 3;

[Explanation of symbols]

6: recording head, 15: transport roller, 23: intermediate roller,
24: tip roller, 25: pressure roller bracket, 37: first discharge roller, 38: second discharge roller, 41: lower discharge guide member, 42: upper discharge guide member, 43: first spur,
44 Second spur.

Claims (9)

[Claims] 1. A recording apparatus comprising: a transport roller for transporting a sheet; and recording means for recording an image on the sheet transported by the transport roller, wherein the recording apparatus transports the sheet based on a center.
The recording apparatus according to claim 1, wherein a conveying force of the conveying roller is higher in a central portion in a sheet width direction than in other portions. 2. The ink jet recording apparatus according to claim 1, wherein a plurality of pressure rollers facing the transport roller are arranged in a paper width direction, and the pressure roller faces a central portion of the transport roller in the paper width direction. Wherein the pressing force of the recording device is higher than the pressing force of another pressing roller. 3. The recording apparatus according to claim 2, further comprising: urging means for urging each of the plurality of pressure rollers toward the conveying roller, and opposing a central portion of the conveying roller in the sheet width direction. The urging means of the pressurizing roller is locked at a mounting position higher than other urging means. 4. The recording apparatus according to claim 2, wherein a pressure of a pressure roller facing a central portion of the transport roller in a sheet width direction can be made substantially equal to a pressure of another pressure roller. Characteristic inkjet recording device. 5. The ink jet recording apparatus according to claim 1, wherein a plurality of pressure rollers facing the transport roller are arranged in a paper width direction, and a pressure roller facing a center portion of the transport roller in the paper width direction. Wherein the surface friction coefficient of the recording device is higher than the surface friction coefficient of another pressure roller. 6. A recording device for recording an image on a sheet, and a roller that can contact the sheet on the downstream side of the recording device,
In an ink jet recording apparatus for transporting the sheet on the basis of a center, the transporting force of the roller is higher at a central portion in a sheet width direction than at other portions. 7. The recording apparatus according to claim 6, wherein a plurality of rollers that can contact the sheet are arranged in a sheet width direction,
A recording apparatus, wherein the arrangement density of the rollers is increased in a central portion in a sheet width direction. 8. A recording apparatus comprising: a conveying roller for conveying a sheet; and a recording unit for recording an image on the sheet conveyed by the conveying roller, wherein the recording apparatus conveys the sheet on an end surface basis.
The inkjet recording apparatus according to claim 1, wherein a transporting force of the transporting roller is higher at the end face side portion than at other portions. 9. A recording device for recording an image on a sheet, and a roller that can contact the sheet on the downstream side of the recording device,
In the ink jet recording apparatus which conveys the paper on the basis of the end face, the conveying force of the roller is higher at the end face side portion than at other portions.