JPH1035965A - Image recording device - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide an image recording apparatus using a sheet loading method capable of reducing a displacement in the width direction of a sheet when the sheet is loaded in a sheet transport unit. Kind Code: A1 A contact of a correction roller pair of a sheet width direction position correcting means for correcting a position in a sheet width direction by causing a difference in a pressing force in a sheet width direction of a conveyance roller for nipping and frictionally conveying a sheet to cause a difference therebetween. The sheet 1 is transported along a member that defines a reference position of the end of the sheet, and the sheet 1 is corrected by the correction roller 601,
After the sheet is clamped by the sheet 602, the sheet is loaded while the sheet position is corrected by the correction rollers 601 and 602. [Effect] Since the sheet is guided to the sheet conveying means along the member which defines the reference position in the sheet width direction, and the continuous sheet is loaded by the sheet width direction position correcting means, the deviation from the reference position in the sheet width direction is reduced. When image recording is performed while skew correction is continuously performed afterwards, quick position correction can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus for transporting continuous paper, and more particularly, to a position correcting device for loading a continuous roller with frictional transport means.

[0002]

2. Description of the Related Art Various types of image recording apparatuses have been put into practical use, in which continuous paper is conveyed to an image recording section by frictional conveyance of rollers to perform recording. The misalignment in the width direction due to the skew of the paper, which is a problem in roller frictional conveyance of continuous paper, is described in the literature (precision machine, 4
No. 7, No. 4, Nishimura; Research on Meandering Correction Method in Paper Roller Feeding), a difference is made between the right and left pressing forces of the conveying rollers to cause a difference in the conveying force acting in the paper width direction. This allows correction. However, when the paper is loaded in the image recording unit, the correction at the time of conveyance can be performed in a short time by roughly aligning the paper with the reference position, which is described in the above-mentioned literature. Absent. Also, Japanese Patent Application Laid-Open No. 7-157153, in which the roll paper is cut and the meandering is corrected when the roll paper is used for printing, does not describe the positioning at the time of loading the roll paper.

[0003]

Problems to be Solved by the Invention
In the method described in Japanese Patent Application Laid-Open No. 3 (1993) -207, two sets of transport rollers are provided between the roll paper and the image recording unit, and when the paper is gripped by the rollers on the image recording unit, the rollers on the roll paper are stopped to perform image recording. In this method, the sheet is conveyed to the image recording unit while the skew is prevented by slipping the sheet and the roller on the copy side, but the first loading of the continuous sheet is not described.

[0004] An object of the present invention is to provide a structure in which a difference is provided between the right and left pressing forces of a conveying roller, to perform a meandering correction by causing a difference in a conveying force acting in a sheet width direction, and to feed a continuous sheet to a sheet conveying section. It is an object of the present invention to provide an image recording apparatus capable of loading a sheet so as to reduce the displacement of the sheet in the width direction when the sheet is loaded.

[0005]

In order to solve the above-mentioned problems, an image recording apparatus is provided with an image recording section for recording an image on a sheet and a sheet perpendicular to the sheet conveying direction before the sheet reaches the image recording section. A line sensor for detecting the position of the end of the sheet, and a difference in the pressing force in the sheet width direction between a pair of conveying rollers for nipping and conveying the sheet between the line sensor and the image recording unit in the sheet width direction. Paper width direction position correction means for correcting the position of the sheet, a member for defining a reference position of a paper end provided on the paper conveyance means in front of the line sensor, and contact of a conveyance roller pair of the paper width direction position correction means. And a member for canceling.

Further, the contact of the pair of conveying rollers of the paper width direction position correcting means is released by driving the release member, and thereafter,
When the operator inserts the paper to the downstream side in the paper transport direction of the transport roller pair along the member defining the reference position of the paper edge, the line sensor detects the installation position of the paper edge, and the allowable value is set. If the sheet is inserted into the sheet conveying means, the conveying roller pair of the sheet width direction position correcting means is brought into a contact state again to hold the sheet, and the sheet is loaded on the sheet conveying means while correcting the sheet by the sheet width direction position correcting means. Configured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a laser printer according to an embodiment of the image recording apparatus of the present invention. FIG. 2 is a perspective view showing a sheet transport unit of the image recording apparatus of FIG. FIG.
FIG. 4 is a block diagram illustrating an example of a sheet loading operation. FIG. 4 is a block diagram illustrating another example of the sheet loading operation. FIG. 5 is a cross-sectional view illustrating a contact state of the correction roller pair of the paper width direction position correction unit when the paper is conveyed, and FIG.
FIG. 3 is a cross-sectional view illustrating an open state of a correction roller pair.

The overall configuration of the image recording apparatus of the present invention will be described with reference to FIG.

An image recording unit for forming a toner image is provided with a rotatable photosensitive drum 101 having a photosensitive layer coated on a metal drum surface, and the surface of the photosensitive drum 101 is uniformly charged on the outer periphery of the photosensitive drum 101. A charger 102 to be formed, and a laser light emitting unit 10 for forming an electrostatic latent image on the photosensitive drum 101
3, an optical system 104 including a mirror and a lens, a developing unit 105 for visualizing an electrostatic latent image with toner to form a toner image, and a toner image formed on the photosensitive drum 101 on paper. A transfer corotron 106 for transfer and a drum cleaner 107 for removing toner remaining after transfer on the photosensitive drum 101 are provided. A paper transport unit that transports continuous paper 1 supplied from a paper supply unit (not shown) includes, in order from the paper supply side, an auxiliary roller 810 that guides the paper 1 supplied from the paper supply unit, and an end with which the paper 1 contacts. Guide 82 provided with a static elimination brush in its section, auxiliary roller 811, regulating guide 3 which is a member for regulating the position of the end of the sheet in the sheet width direction when the sheet is loaded in the sheet conveying section, detection of displacement in sheet width direction Means, a CCD (Charged C)
(Open Device) A line sensor 21 which is an image sensor, an LED 22 which is a light source thereof, a paper position correcting means 6 for correcting a positional deviation in a paper width direction, and a correction roller 601 and 602 of the paper position correcting means 6 for contacting and opening. On the downstream side of the cam 631, the paper guide 83, and the transfer corotron 106, a paper guide 84, and driven rollers 85 provided at both ends of the paper so as not to contact the transferred image on the paper.
And a drive roller 86 having a full width of the paper, a tensioner 87 for applying a constant tension to the paper, a paper feed belt 88 for moving the paper in the direction of the arrow at the time of paper setting and feeding the paper, a pair of auxiliary feed rollers 89, A fixing section including a heat panel 91 for fixing a transferred image, a heat roller 92 and a backup roller 93 is provided. An auxiliary roller 812 for guiding the sheet 1 to the outside is provided downstream of the fixing unit.

Next, details of the sheet transport unit will be described.
When loading paper in the paper transport unit, the regulation guide 3
The sheet is located at the position a for regulating the position of the end of the sheet in the width direction, and moves to the position b in the sheet width direction when the correction rollers 601 and 602 of the sheet position correcting means 6 sandwich the sheet.

In this embodiment, the position correcting means 6 is a driven-side correction roller 601 provided on the entire width of the sheet 1 as shown in FIG.
And a correction roller 602 on the driving side, and by providing a difference in the pressing force acting on both ends of the correction roller on the driven side, a difference is generated in the conveying force acting in the width direction of the sheet 1,
The displacement of the sheet 1 is corrected. The correction roller 6 provided on the entire width of the paper 1 according to the position detection output of the paper edge of the line sensor 21 installed on the upstream side of the position correction means 6.
No. 01 is a position correction method that causes a difference in the pressing force acting on both ends. LED 22 is placed on line sensor 21
Is installed at a position where the light is irradiated on the sensor section, and the light is blocked by the sheet edge, so that the line sensor 21 detects the position of the sheet edge. The correction roller 602 on the driving side is
It is rotatably attached to a side plate (not shown) and is driven by a motor (not shown). Correction roller 601 on the driven side
Are rotatably attached to left and right arms 607 and 608, and the arms 607 and 608 are rotatably attached to a fulcrum position by a shaft 623. Spring 61
9, 620 tensile force of wire ropes 615, 616,
Pulleys 609, 610, 611, 61 at 617, 618
The power of the arms 607, 608 is transmitted to the pulleys 609, 610 and the end portions of the wire ropes via the arms 2, 613, 614, and the arms 607, 608 rotate around the fulcrum by leverage. Thus, a pressing force is applied to the correction roller 601 on the driven side. The ends of the wire ropes 615, 616, 617, 618 are attached to the pulley 624 of the control motor 621 in order to generate a difference in the left and right pulling forces. Control motor 621, pulleys 611, 612, 613,
614 is attached to the plate 622. Further, in order to rotate the arms 607 and 608 to contact and release the correction rollers 601 and 602 when loading the paper, a cam 631 fixed to a shaft 635 provided in a direction perpendicular to the paper of FIGS. 632 is provided, and the outer peripheries of the cams 631 and 632 are brought into contact with the upper parts of the arms 607 and 608, and the pulleys 609 and
It is rotatably mounted on the 610 side by a motor (not shown).

As shown in FIG. 2, driven rollers 85 provided at both ends of the sheet which do not contact the transferred image on the sheet
51 is attached to a carrier 852 provided so as to be able to move directly, and can be moved according to the sheet width. However, the position of the driven roller provided with the regulation guide 3 on the sheet position reference side is fixed regardless of the sheet width. The drive roller 86 is rotatably attached to a side plate (not shown), like the correction roller 602 on the drive side, and is driven by a motor (not shown).

Next, the paper loading operation of the image recording apparatus of the present invention will be described.

First, the paper loading method shown in FIG. 3 will be described. As shown in FIG. 6, when a sheet is loaded, when an operator turns on a switch (not shown), the cams 631 and 632 are rotated by a motor (not shown), and the arm 607,
608 is depressed, and the correction roller 6
01 and 602 are opened. At the same time, Regulation Guide 3
Moves to the reference position in the paper width direction. That is, the regulation guide 3 is at the position a shown in FIG. After the regulation guide 3 is moved to the reference position, the operator moves the paper 1 along the regulation guide 3, on the downstream side of the correction rollers 601 and 602 in the sheet conveyance direction,
The transfer corotron 106 is inserted up to the paper transport upstream side.
Only when the end of the sheet is detected by the line sensor 21 and it is within the allowable value, the switch for rotating the cams 631 and 632 can be turned on. When the switch for rotating the cams 631 and 632 is turned on again, the cams 631 and 632 are turned on. Rotates, and as shown in FIG. 5, the correction rollers 601 and 602 return to the contact state, and the regulating guide 3 moves from the reference position to the position b. Thereafter, the correction roller 6 corrects the positional deviation in the paper width direction calculated from the value of the positional deviation detection of the line sensor 21 in the paper width direction.
01 and 602, the sheet 1 is fixed by a sheet guide 83, 84, rollers 85 and 86, a tensioner 87, a sheet feed belt 88 involved in sheet feeding only when the sheet is supplied, and an auxiliary feed roller 89. And paper loading ends.

The above-mentioned loading method is performed by opening the correction rollers 601 and 602 of the sheet position correcting means 6 and inserting the sheet 1 along the guide 3 to the downstream side of the correction rollers 601 and 602 in the sheet conveying direction. , Correction rollers 601, 60
By returning the sheet 2 to the contact state and nipping the sheet 1, the correction rollers 601 and 602 of the sheet position correcting means 6 can be loaded almost equally to the reference position of the end of the sheet regardless of the shape of the leading end of the sheet. Further, since the sheet 1 is conveyed to the image recording unit and the fixing unit while being corrected by the sheet position correcting unit 6, the sheet 1 can be loaded in accordance with the reference position in the sheet width direction.

Next, a paper loading method according to another embodiment shown in FIG. 4 will be described. The control guide 3 is moved to the reference position a in the paper width direction, and the operator places the paper 1 on the control guide 3.
Are conveyed along and pressed against the correction rollers 601 and 602, and the end of the sheet is detected by the line sensor 21. Only when the edge is within the allowable value, the correction rollers 601 and 602 are rotated by a motor (not shown). After conveying the sheet 1 and the correction rollers 601 and 602 sandwich the entire sheet width, the regulating guide 3 moves from the reference position to the position b. Thereafter, the correction rollers 601 and 602 respond to the positional deviation in the paper width direction calculated from the value of the positional deviation detection of the line sensor 21 in the paper width direction.
The paper 1 is conveyed to the fixing unit while the paper position is corrected by the above, and the paper loading is completed.

In this loading method, the sheet 1 is
In order to convey the roller against the roller 1, 602, it is necessary that the leading edge of the sheet is substantially perpendicular to the edge and cut almost linearly. In addition, in the two embodiments described with reference to FIGS. 1 to 4, the regulating guide 3 provided at the reference position of the end of the sheet.
Considers that it is convenient for the operator to load paper. However, it is clear that, for example, if a mark indicating the reference position is provided on the sheet conveyance path, the sheet can be loaded satisfactorily at the reference position. That is, the paper is loaded using the reference position mark as a member for regulating the reference position.

After a series of sheet loading operations is completed,
The image is recorded while the sheet position correction is continuously performed for the sheet width direction displacement calculated from the value of the sheet width direction displacement detection of the line sensor 21. In the image recording unit, after an electrostatic latent image is formed on the photosensitive drum 101,
The developing unit 105 forms a toner image. The toner image formed on the photosensitive drum 101 is transferred to the transfer corotron 1
At 06, the image is transferred onto the sheet 1 and conveyed to the fixing unit, where it is fixed on the sheet. The sheet after fixing is conveyed to a post-processing unit such as a sheet cutting device or a sheet reversing device (not shown).

Next, the details of the position correcting means 6 for correcting the position in the sheet width direction according to the position detection output of the sheet edge will be described.

The position correcting means 6 shown in FIGS. 1 and 2 presses the correction rollers 601 provided on the entire width of the sheet 1 in accordance with the position detection output of the end of the sheet from the line sensor 21. The position in the width direction of the paper that causes a difference in pressure is corrected. When the sheet 1 is displaced, the line sensor 21 detects the displacement, and a signal of a correction amount is output from a correction control unit (not shown). This signal causes the control motor 621 to rotate by a predetermined angle to change the tensile force of each of the springs 619 and 620. This difference in the tensile force is caused by the spring 61
Wire ropes 615, 616 connected to 9, 620,
Pulleys 609, 610, 61 via 617, 618
The force is transmitted to the arms 607 and 608 while changing the direction of the force by 1, 612, 613 and 614, and the arms 607 and 608 are transmitted.
08 correction roller 601 on the driven side attached to the tip of
And the pressure difference between the left and right sides. This pressure difference causes a difference in the conveying force acting in the width direction of the sheet 1, and corrects the positional shift of the sheet 1. FIG. 7 is a diagram illustrating a state of the position shift correction. Specifically, as shown by the solid line in the figure, when the sheet 1 is shifted from the sheet end reference position on the line sensor 21, the pressure on the left side of the correction roller 601 on the driven side is increased, The paper 1 moves as indicated by the dotted line in FIG. Next, the correction roller 6 on the driven side
When the pressure on the right side of 01 is increased, the amount of advance on the right side of the sheet 1 increases, and the sheet 1 moves as indicated by the one-dot broken line in the figure. The sheet 1 is corrected to the sheet end reference position by repeating the above operation. The smaller the distance between the correction rollers 601 and 602 and the line sensor 21 is, the more the correction roller 601,
There is no difference between the amount of displacement in the sheet width direction at the portion 602 and the amount of displacement at the line sensor 21 portion, and the sensitivity of the displacement correction is increased. Further, the correction rollers 601 and 602
And also performs the role of transporting the paper at the same time, so that even if the load on the paper supply side is large, it is possible to prevent image deterioration.

Further, both of the correction rollers 601 and 602 are driven, and the conveying force of the sheet 1 is controlled by the conveying rollers 85 and 86.
The correction rollers 601 and 602 may be operated only for correcting the positional deviation. In this case, the misregistration correction requires control reverse to that described with reference to FIG. 7 because the sheet escapes from the side where the pressure is increased.

In correcting the displacement, the line sensor 21
In the further upstream side of the sheet conveyance, a meandering occurs at the end of the sheet 1. Therefore, if the sheet mounting regulation guide 3 is provided at the sheet end reference position at the time of sheet conveyance, the sheet edge collides with the guide and a sheet jam occurs. Resulting in. Therefore, the regulation guide 3 is at the paper end reference position only until the paper 1 is loaded into the paper position correction means 6, and when performing position correction in the paper width direction according to the position detection output of the paper end, It is provided away from the end reference position.

FIG. 8 shows the control result of the paper edge position when the image recording apparatus of the present invention is loaded without using the paper loading method of FIG. 3, and FIG. 9 shows the result of FIG. 7 shows a control result of the sheet edge position when the sheet loading method of the above is used. In FIG. 8, since the reference position is not fixed when the sheet is loaded, the initial deviation of the sheet end position is large and diverges without being settled within the allowable range from the reference position 0. In FIG. 9, since the paper is loaded by the paper position correcting means 6 using the regulation guide 3, the initial deviation of the paper end position is reduced, so that the paper is easily settled within an allowable range from the reference position, and the settling time is shortened. Therefore, the position correction is completed only by loading the paper, and the number of papers on which the image cannot be recorded can be reduced.

Next, another embodiment of the image recording apparatus of the present invention will be described. FIG. 10 is a sectional view showing a laser printer according to a second embodiment of the image recording apparatus of the present invention. FIG. 11 is a perspective view showing a sheet transport unit of the image recording apparatus of FIG. FIGS. 12 and 13 are block diagrams illustrating the sheet loading operation in the image recording apparatus according to the second embodiment. First, the configuration of the present embodiment will be described with reference to FIGS.

With respect to the embodiment shown in FIGS. 1 and 2, before the regulation guide 3 for regulating the position of the end of the sheet in the width direction, the angle in the conveyance direction for conveying the sheet along the regulation guide 3 is set. An inclined roller 71 is provided. A cam 72 and a cam drive motor 73 for bringing the slant roller 71 into and out of contact with the sheet 1, a spring 74 for generating a pressing force on the slant roller 71, and support arms 75 and 76 for the slant roller 71. Have been.

Next, the sheet loading operation of this embodiment will be described.

First, the paper loading method shown in FIG. 12 will be described. In the case of loading paper, when an operator turns on a switch (not shown), the correction roller 6 of the paper position correction means 6 is turned on.
After the regulating guide 3 moves to the reference position a in the paper width direction, the cam motor 73 of the oblique roller 71 is driven to rotate the cam 72, and the oblique roller 7
1 is brought into contact with the sheet 1, and the sheet 1 is transported along the regulation guide 3 to the downstream side of the correction rollers 601 and 602 in the sheet transport direction and the upstream side of the transfer corotron 106 to the sheet transport. Only when the end of the sheet is detected by the line sensor 21 and within the allowable value, the correction rollers 601 and 602 are returned to the contact state again, the regulating guide 3 moves from the reference position to the position b, and the oblique roller 71 The cam 72 also rotates to release the contact with the paper 1. After that, the paper is loaded while the paper position is corrected by the correction rollers 601 and 602.

In the loading method described above, the correction rollers 601 and 602 of the paper position correction means 6 are opened, and the paper 1 is inserted along the regulating guide 3 to the downstream side of the correction rollers 601 and 602 in the paper transport direction. Then, the correction roller 601,
By returning the sheet 602 to the contact state and nipping the sheet 1, the correction rollers 601 and 602 of the sheet position correcting means 6 can be loaded almost equally to the reference position of the end of the sheet regardless of the shape of the leading end of the sheet. Further, since the sheet 1 is conveyed to the image recording unit and the fixing unit while being corrected by the sheet position correcting unit 6, the sheet 1 can be loaded in accordance with the reference position in the sheet width direction.

Next, a sheet loading method according to another embodiment shown in FIG. 13 will be described. The regulating guide 3 is moved to the reference position a in the paper width direction, and the cam motor 73 of the diagonal roller 71 is driven to rotate the cam 72 to bring the diagonal roller 71 into contact with the paper 1. The sheet 1 is conveyed along the regulation guide 3 by the diagonal roller 71 and pressed against the correction rollers 601 and 602, and the end of the sheet is detected by the line sensor 21. , 602 are rotated by a motor (not shown) to convey the sheet 1, and after the correction rollers 601 and 602 sandwich the entire sheet width, the rotation of the oblique rollers 606 and the correction rollers 601 and 602 stop.
Subsequently, the regulation guide 3 moves from the reference position to the position b, and the oblique roller 71 also rotates the cam 72 to release the contact with the sheet 1. After that, the paper is loaded while the paper position is corrected by the correction rollers 601 and 602.

In this loading method, the sheet 1 is
In order to convey the roller against the roller 1, 602, it is necessary that the leading edge of the sheet is substantially perpendicular to the edge and cut almost linearly. Further, another embodiment of the contact and opening means of the correction roller pair of the paper width direction position correcting means in the image recording apparatus of the present invention will be described. FIG. 14 is a cross-sectional view illustrating a contact state of the correction roller pair of the paper width direction position correction unit during paper conveyance, and FIG. 15 is a cross-sectional view illustrating an open state of the correction roller pair.

Solenoids 633 and 634 are attached to side plates (not shown) so that the tips of the movable parts 636 and 637 of the direct-acting solenoids 633 and 634 come into contact with the upper parts of the arms 607 and 608.

When the solenoids 633 and 634 are energized by a control circuit (not shown), the movable parts 636 and 637 push down the arms 607 and 608, and open the correction rollers 601 and 602 of the paper position correction means 6. Further, when the energization of the solenoids 633 and 634 is cut off, the pressing force acting on the correction roller 601 causes the correction roller 60
1, 602 returns to the contact state.

[0034]

According to the paper loading method of the present invention, the paper is guided to the paper transport means along the member defining the reference position in the paper width direction, and the continuous paper is loaded by the paper width direction position correcting means. In addition, the paper can be loaded while holding down the deviation from the reference position in the paper width direction with a small amount, and when the image is recorded while the skew correction is continuously performed, the position can be quickly corrected.

Further, since the initial deviation of the sheet end position is reduced, it is easy to settle within an allowable range from the reference position, and the settling time is shortened.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a sheet transport unit of the image recording apparatus of FIG.

FIG. 3 is a block diagram illustrating an example of a sheet loading operation in the image recording apparatus of FIG. 1;

FIG. 4 is a block diagram illustrating another example of the sheet loading operation in the image recording apparatus in FIG. 1;

FIG. 5 is a cross-sectional view illustrating a contact state of a pair of correction rollers of a sheet width direction position correction unit during sheet conveyance.

FIG. 6 is a cross-sectional view showing an open state of a pair of correction rollers of a paper width direction position correction unit.

FIG. 7 is a diagram showing a state of position shift correction.

FIG. 8 is a diagram illustrating a control result of a sheet end position when a sheet is loaded without using the sheet loading method of FIG. 3;

9 is a diagram illustrating a control result of a sheet edge position when a sheet is loaded using the sheet loading method of FIG. 3;

FIG. 10 is a sectional view showing a laser printer according to a second embodiment of the image recording apparatus of the present invention.

FIG. 11 is a perspective view showing a sheet transport unit of the image recording apparatus of FIG.

12 is a block diagram illustrating an example of a sheet loading operation in the image recording apparatus in FIG.

13 is a block diagram illustrating another example of the sheet loading operation in the image recording apparatus in FIG.

FIG. 14 is a cross-sectional view showing a contact state of a pair of correction rollers of a sheet width direction position correction unit when a sheet is conveyed according to another embodiment of the contact and release unit of the correction roller pair.

FIG. 15 is a cross-sectional view showing a contact state of the correction roller pair of the sheet width direction position correction means and an open state of the correction roller pair according to another embodiment of the release means.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper, 21 ... Line sensor, 22 ... LED, 3 ... Regulation guide, 6 ... Position correction means, 71 ... Oblique roller

Continuing from the front page (72) Inventor Junichi Matsuno 502, Kandachicho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Inventor Yasuyoshi Tsuji 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Machine Co., Ltd. (72) Hideho Yokokawa 2-6-1, Otemachi, Chiyoda-ku, Tokyo Sun Standing Machine Co., Ltd. (72) Inventor Takeo Nakajima 2-5-2, Otemachi, Chiyoda-ku, Tokyo Sun (72) Inventor Muneki Akai 2-6-1 Otemachi, Chiyoda-ku, Tokyo Nikkachi Inside (72) Inventor Yoji Hirose 2-6-Otemachi, Chiyoda-ku, Tokyo No. 2 Inside of Ritsukoki Co., Ltd.

Claims (6)

[Claims] A sheet conveying means for frictionally conveying a continuous sheet; an image recording section for recording an image on the sheet; and a sheet end provided at right angles to the sheet conveying direction before the sheet reaches the image recording section. A line sensor that detects the position of the paper sensor, and a difference in the pressing force in the paper width direction between the pair of conveying rollers that frictionally convey the paper by nipping the paper between the line sensor and the image recording unit to correct the position in the paper width direction. Paper width direction position correcting means,
An image recording apparatus comprising: a member that is provided in a sheet conveying unit before the line sensor and that defines a reference position of a sheet end. 2. An image recording apparatus according to claim 1, further comprising a member for releasing the contact of the pair of conveying rollers of said paper width direction position correcting means. 3. The paper width direction position correcting means according to claim 1, wherein the release member is driven to release the contact of the transport roller pair of the paper width direction position correcting means, and then the operator moves along the member defining the reference position of the paper edge. When the paper is inserted to the downstream side in the paper transport direction of the transport roller pair, the line sensor detects the installation position of the paper end portion. An image recording apparatus characterized in that a pair of conveying rollers is brought into a contact state again, a sheet is sandwiched, and the sheet is loaded into the sheet conveying means while being corrected by a sheet width direction position correcting means. 4. The image recording apparatus according to claim 1, wherein the member that defines the reference position of the paper edge is a guide that regulates the paper edge position. 5. The image recording apparatus according to claim 1, wherein the member that defines the reference position of the sheet edge is a mark provided at the reference position. 6. An apparatus according to claim 4, wherein in order to convey the paper along the guide, an angle is formed at an acute angle in the conveyance direction so that a conveyance force acts in a direction in which the paper is pressed against the guide. An image recording apparatus comprising an oblique roller.