JPH10167508A - Sheet carrier device and recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration of an image dignity of white streak by providing resistance to an action in the carrying direction of a sheet and changing the degree of the resistance. SOLUTION: A brake means 50 is so mounted that a shaft part, 8b of a carrier roller 8 is sandwiched, a brake shoe supported by a brake arm is so constituted as to apply load to the shaft part 8b by sliding friction, and a brake screw 506 is interlocked with a brake force changing operation lever 511 by an interlock mechanism 510. The load torque generated in a carrier roller 8 is decided by flexibility of a brake spring by a clearance formed between a spring bearing part 506b of the brake screw 506 and a spring bearing part. 504a of the brake arm. When the brake screw 506 is fastened, the interval is narrowed, the load torque generated in the carrier roller 8 is increased, and when it is loosened, the torque is decreased. The brake screw 506 can be thus fastened/loosened by rotating the brake force changing operation lever 511.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus having a conveying means for conveying a recording medium to a recording means, and more particularly, to a recording apparatus which discharges ink onto the recording medium to print an image or the like. The present invention relates to an inkjet recording apparatus that performs recording.

[0002]

2. Description of the Related Art In recent years, with the spread of personal computers, word processors, facsimile machines and the like in offices, various recording devices have been developed as output devices for these devices. Similarly,
A wide variety of types of recording media are also provided, which cannot be simply classified by plain paper, fanfold paper, postcards, etc., but plastic sheet materials such as OHP films, cloth,
Between the yarns, all the ink supports that receive various types of ink are supplied as recording media.

With reference to FIG. 8, the outline of the structure of a recording medium transport mechanism of such a recording apparatus will be described.

In FIG. 8, a cut-sheet-shaped recording medium 2 laminated on an automatic sheet feeder 100 (hereinafter also referred to as ASF) is shown.
Sheets (hereinafter also referred to as cut sheets) are fed while being separated one by one by a pickup roller 104 that rotates in response to a sheet feeding start command.

When the recording apparatus 1 uses a cut sheet,
When a release lever (not shown) is set to a cut sheet selection position, a pinch roller 6 as a pressing means held by a pinch roller holder 5 supported on the apparatus main body so as to swing about a shaft 5a serves as a pressing force applying means. The state is urged by the pinch roller spring 7 toward the conveying roller 8.

Similarly, the auxiliary roller 9 held up and down by the pinch roller holder 5 is urged by the conveying roller 8 by an auxiliary roller spring 10 also provided on the pinch roller holder 5.

As a result, the cut sheet 2 fed from the ASF 100 is pressed against the conveying roller 8 by the pinch roller 6 and the auxiliary roller 9, and the conveying path formed around the conveying roller 8 by the rotation of the conveying roller 8 reaches the recording area. Conveyed.

On the recording area side, the needle roller holder 1
The needle roller 12 held at 1 is urged toward the transport roller 8 by a needle roller spring 13. At this time, the needle roller spring 13 is rotatably supported with the intersection 13a as a fulcrum and abuts on the projection 14a of the release shaft 14 to bend, and the spring elastic force around the intersection 13a is generated. Generates a pressing force.

The cut sheet 2 is further sandwiched between the nip between the transport roller 8 and the needle roller 12 and obtains a transport force to mount the cut sheet 2 on the carriage 3 (here, described as an ink jet print head). It is transported between the platen 15.

The conveyance is performed intermittently for each scan of the recording head 4, and the amount of conveyance is determined by the arrangement length of the plurality of ink ejection ports provided in the recording head 4 in the conveying direction of the cut sheet 2. Corresponding to The cut sheet 2 on which the recording is performed by the conveyance for each scan and the ejection of the ink from the recording head 4 during the scanning is applied to the gap roller 16 and the discharge roller 17 (and the respective spur-shaped rotations pressed by these rollers). By means of the bodies 16a, 17a), the paper is sequentially conveyed to the upper side of the apparatus, and is discharged by the spur-shaped rotating body 17b.

Reference numeral 18 denotes a pin feed tractor for transporting continuous paper such as fanfold paper.

In the recording medium transport mechanism as described above,
Since the conveyance path from the paper supply to the paper discharge has a substantially U-turn shape along the outer diameter of the conveyance roller 8, a larger conveyance force is required than a straight conveyance path. In particular, in the case of thick paper such as postcards and envelopes, or film-like paper prepared for high-quality printing, the stiffness of the paper becomes stronger, so that the required transporting force becomes larger.
There are restrictions on the material hardness and coefficient of friction in the production or actual use, and there is a limit to the increase in the conveying force by itself.

Therefore, in general, a larger conveying force is generated by increasing the pressing force of the pinch roller 6 and the auxiliary roller 9.

However, in the recording medium transport mechanism of the recording apparatus as described above, the pinch roller 6 pressed against
When the rear end portion of the cut sheet 2 is detached from the auxiliary roller 9 or the auxiliary roller 9, a phenomenon in which the transport roller 8 rotates excessively due to a load variation due to the thickness or stiffness of the paper (hereinafter, also referred to as a kicking phenomenon) may occur. Particularly, in the case of thick paper such as postcards and envelopes, the generation amount is remarkable, and furthermore, the pinch roller 6 and the auxiliary roller 9 are used to increase the conveying force.
In some cases, the kicking phenomenon may occur even in a normal cut sheet by increasing the pressing force of the sheet.

Referring to FIGS. 9 and 10, an outline of the kicking phenomenon will be described.

FIG. 9 shows a state immediately before the rear end of the cut sheet 2 comes off the pinch roller 6, and FIG.

The cut sheet 2 pressed against the conveying roller 8
Due to a load change when the trailing end of the sheet P comes off the pinch roller 6, the transport roller 8 rotates in the A direction by a predetermined amount or more.

That is, when the rear end of the cut sheet 2 passes through the pressure contact between the conveying roller 8 and the pinch roller 6 as shown in FIG. 9, the pressing force of the pinch roller 6 is perpendicular to the sheet surface (the conveying roller 8 (In the direction toward the center of the circle), but inclined as shown by arrow D. On the other hand, since the transport roller 8 is driven by a drive source such as a pulse motor via a gear train, there is a play that can freely rotate in the transport direction by the amount of gear backlash. Therefore, the component B in the tangential direction of the conveying roller 8 in the direction of arrow D is
Is rotated more than usual by play.

Therefore, if such an over-rotation phenomenon occurs just before the conveyance for one scan is completed, the cut sheet 2 moves in the C direction in the recording unit by more than the conveyance amount for each scan. White streaks will occur between the lines.

In order to prevent the image quality from deteriorating due to such a kicking phenomenon, the present applicant has filed Japanese Patent Application No. Hei 8-96664.
In the issue (not disclosed), the following purpose was proposed.

Hereinafter, referring to FIGS. 11 and 12, a means for generating a load in the rotating direction of the transport roller 8 as a transport means or a rotating body, a resistance generating means, or a resistance applying means (hereinafter also referred to as brake means) will be described. The configuration of the proposed embodiment will be described.

FIG. 11 is a side sectional view of a recording apparatus provided with the structure of the brake means 50 which is the means for preventing the over-rotation phenomenon in the proposal, and FIG. 12 is an enlarged view of the brake means 50.

As is apparent from FIGS. 11 and 12, the brake means 50 according to the proposal is mounted so as to sandwich the shaft 8a of the transport roller 8, and a load due to a constant sliding friction is applied to the shaft 8a. It is configured to be hung.

That is, the brake arms 503 and 504 as support members to which the brake shoes 501 and 502 as press members or contact members are attached, respectively, are rotated relative to each other at one end with the rotation support shaft 505 as a fulcrum. A configuration in which it is operable, and at the end opposite to the rotating shaft 505 with the shaft 8a of the transport roller 8 interposed therebetween, a brake spring 507 as a biasing means is used to tighten and attach the brake screws 506 to each other. Has become. The brake shoes 501 and 502 are made of, for example, a plastic material having sliding characteristics, and the brake arms 503 and 504 are made of a molded product (die-cast) made of, for example, zinc or aluminum.

Here, the brake screw 506 is a step screw, which penetrates through the brake arm 504 with play, and
3 is tightened until the step portion 506a of the brake screw comes into contact with the brake arm 503, whereby the spring receiving portion 50 of the brake screw 506 is tightened.
6b is configured to be at a fixed position with respect to the brake means.

The brake spring 50 is connected to the brake screw 506.
7 is provided, and by tightening the screw, the spring receiving portion 506b of the brake screw 506 and the brake arm 50
4 between the spring receiving portions 504a,
As a result, the brake shoes 501 and 502 act as urging means for generating a constant pressing force against the shaft 8a of the transport roller 8.

Here, the brake means 50 is configured so that the stopper plate 503b, 504b of the brake arm 503, 504 sandwiches a regulating plate 20a as a position regulating portion which is a part of the frame chassis 20 of the recording apparatus. I have. Therefore, even if the transport roller 8 rotates, the brake means 50 comes into contact with the regulating plate 20a of the frame chassis 20 and stops, so that the shaft 8a of the transport roller 8 rotates while slipping with respect to the brake shoes 501 and 502, The frictional force becomes a resistance to rotation. As a result, a load torque in the rotation direction is applied to the transport roller 8. The magnitude of the load torque is stronger than the force that causes the transport roller 8 to rotate more than a specified amount due to the energy generated by the kicking phenomenon due to the thickness and stiffness of the recording medium described above. The size is set so as not to hinder the driving of the entire conveyance system, and an example of the value is about 300 gcm to 2000 gcm in the axial torque of the conveyance roller 8. Adjustment of the set value of the load torque is performed by the brake spring 5.
07 is set.

Therefore, according to the invention of Japanese Patent Application No. 8-96664, when the rear end of the cut sheet 2 comes off the pinch roller 6, the force acting on the rear end of the cut sheet from the pinch roller 6 in the transport direction is reduced. The phenomenon that the transport roller 8 is over-rotated by the component can be suppressed, and the problem of the recording apparatus described above can be solved.

[0029]

However, in the recording medium transport mechanism in the recording apparatus such as the above-mentioned proposal, the load torque of the brake means 50 applied to the transport roller 8 is determined by the drive load of the entire transport system and the LF motor. The upper limit value is determined according to the relationship with the power (generated torque), and it is impossible to apply more load torque than necessary.

It is empirically known that the rotational load torque of the transport roller 8 becomes heavy due to aging (deposition of abrasion powder and paper dust on bearings and sliding parts) due to long-term use. Considering the increase of the load change in a transport device or a recording device that assumes the number of sheets to be 100,000 or more, it is necessary to select either a stronger motor or a lower initial braking force. Was to be done.

When a stronger motor is used, the cost and the size of the apparatus are inevitably increased, and if the initial braking force is set low, the image may be deteriorated by white stripes.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to more efficiently prevent deterioration of image quality due to white streaks caused by a kicking phenomenon.

[0033]

In order to achieve the above object, a typical sheet conveying apparatus according to the present invention has a configuration in which a single sheet sheet can be conveyed.
Conveying means for conveying the sheet, pressing means for pressing the sheet against the conveying means, pressing force applying means for applying a pressing force for pressing the sheet against the conveying means to the pressing means, and a conveying direction of the conveying means And a resistance applying means for applying a resistance to the operation of (1), wherein the magnitude of the resistance applied to the transport means of the resistance applying means can be changed.

Alternatively, the magnitude of the resistance generated by the resistance applying means is changed by operating a resistance changing operation means for interlocking the resistance applying means.

Further, a typical configuration of a recording apparatus according to the present invention for achieving the above object has a sheet transporting apparatus having the above configuration and recording means for performing recording on a sheet transported by the sheet transporting apparatus. It is characterized by the following.

[0036]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show an ink jet recording apparatus according to an embodiment of the present invention. FIG. 1 is an external perspective view showing a state in which an ASF 100 is mounted on the apparatus main body. FIG. 2 is a cross-sectional view illustrating a main configuration of the ASF 100 of FIG. 1 in a two-bin configuration.

The ink jet recording apparatus 1 of this embodiment can use ordinary recording paper, cut sheets such as postcards, and continuous paper such as fanfold paper as the recording medium.

That is, when a cut sheet is used, the sheet is usually fed using the ASF 100, or fed by a so-called manual feed.

The ASF 100, as evident in FIG.
The bins are composed of two bins 101a and 101b. For example, cut sheets having different sizes can be set in each bin at the same time, and cut sheets having two different sizes can be used in accordance with a user's selection operation.

The paper feeding mechanism of each bin 101a, 101b
It has the same mechanism. That is, the pressing plates 102a, 10a
A plurality of cut sheets (cut sheets are not shown in FIG. 2) stacked on
3a and 103b, the pickup roller 104
pickup roller 104a or 104b, which is urged against a
b, the sheets are fed while being separated one by one.

On the other hand, when conveying continuous paper such as fanfold paper, when the release lever 19 is set to the continuous paper selection position, the drive is transmitted to the pin feed tractor 18 and the continuous paper set on the pin feed tractor 18 is transferred. It will be transported.

Further, the recording apparatus 1 is provided with an operation display section 21 for displaying the state of the apparatus to the user on a so-called front panel section.

Next, the configuration of a control system of the ink jet recording apparatus will be described with reference to FIG.

In FIG. 3, the control board 200 is in the form of a printed circuit board, and is provided at the bottom of the apparatus main body. The control board 200 includes an MPU 201, a gate array (GA) 202, a dynamic RAM (DRA).
M) 203 and mask ROM (MASK ROM) 2
07 is provided.

A driving circuit for each motor, that is, a CR motor driver (carriage motor driver) 204, LF
Motor driver (line feed motor driver) 20
5, and an ASF motor driver 206 are also provided.

The control board 200 includes a Centronics interface (I / F) in the form of a printed circuit board.
The board 208 is connected, and thus, it is possible to receive recording data and the like from a device such as a host computer.

In the control board 200, the MPU 20
Reference numeral 1 denotes data processing for the entire apparatus.

The MASK ROM 207 stores the data processing procedure and the like, and the DRAM 203 is used as a work area for the data processing. Further, various circuits related to data processing of the MPU 201 are formed in the gate array 202.

Therefore, the MPU 201 is connected to the I / F 208
The image data transferred from a device such as a host computer via the printer is converted into ejection data to be used by the inkjet recording head 4 as recording means, and the data is converted according to the ejection timing of the inkjet recording head 4. Of the driver. Further, the MPU 201 is provided with each driver 2
The corresponding motors 209, 210, 211 are driven via 04, 205, 206. In particular, the drive control of the CR motor 209 is performed together with the ejection timing control based on the information of the linear encoder 212 obtained via the carriage 3.

In addition, the MPU 201 performs processing related to key input and information on the front panel 213 including the operation display unit 21, the home position (HP) sensor 214, the tractor detection (RRL) sensor 215, and the sheet detection (PE). ) Sensor 216, paper type determination sensor 217
And performs a process corresponding to the detection information from.

Next, with reference to FIG. 4, the configuration of an embodiment of the brake means 50 according to the present invention and the brake force changing operation means for changing the magnitude of the brake force will be described.

FIG. 4 is a side sectional view of a recording apparatus in which the structure of the brake means 50 according to the first embodiment is mounted, and FIG. 5 is a partial front view for explaining the brake force fluctuation operation means. .

The structure of the entire apparatus and the braking means 5
0 itself is the same as that disclosed in Japanese Patent Application No.
Since the configuration is substantially the same as that of the -96664 proposal, the same components are denoted by the same reference numerals, description thereof will be omitted, and only the features of the present embodiment will be described.

As is clear from the above description with reference to FIGS. 4 to 5 and FIG.
Numeral 0 indicates that the brake shoes 501 and 502 supported by the brake arms 503 and 504 are mounted so as to sandwich the shaft 8a of the transfer roller 8 as a transfer means, and the sliding of the brake shoe 501 and 502 is constant with respect to the shaft 8a of the transfer roller 8. It is configured to apply a load due to friction. The brake screw 506
Is a coupling mechanism 510 represented by an abbreviation (dashed line) in the figure.
Thus, it is configured to interlock with the brake force variation operation lever 511.

The structure of the connecting mechanism 510 can transmit the operating force due to the rotation of the brake force changing operation lever 511 as the rotational force of the brake screw 506, for example, a connection by a multi-stage gear or a timing belt or a crank mechanism. A configuration is used.

The load torque generated on the transport roller 8 by the brake means 50 is such that the brake spring 507 is connected to the spring receiving portion 506 b of the brake screw 506 and the brake arm 504.
The size of the brake is generated by the urging force generated by being urged between the spring receiving portions 504a of the brake arm 504a of the brake arm 504 and the spring receiving portion 506b of the brake screw 506. It is determined by the amount of deflection of the spring 507.

That is, by tightening the brake screw 506, the spring receiving portion 506b of the brake screw 506 is tightened.
The distance between the spring arm 504a and the spring receiving portion 504a of the brake arm 504 is reduced, and the brake spring 507 is further compressed. As a result, the load torque generated on the transport roller 8 by the brake means 50 increases. Conversely, by loosening the brake screw 506, the load torque can be reduced.

Here, the tightening and loosening of the brake screw 506 can be operated by rotating the brake force changing operation lever 511. That is, the user of the device operates the brake force variation operation lever 51 in the direction of arrow a in FIG.
1 is operated, the connecting mechanism 510 causes the brake screw 5
As a result, the load torque generated on the transport roller 8 decreases.

The brake force variation operation lever 51
In the vicinity of 1, a scale portion 512 is provided as a guide for setting the rotation of the operation lever.

The braking force to be applied to the transport roller 8 is determined by the magnitude of the force that causes the transport roller 8 to rotate more than a specified amount by the energy generated by the kicking phenomenon of the recording medium. I just need. Therefore, when the rotational load torque of the transport system itself including the transport roller 8 becomes heavy due to aging due to long-term use (accumulation of abrasion powder and paper dust on the bearings and sliding parts), the transport roller may be depleted from the energy due to the kicking phenomenon. The braking force for suppressing the overfeed of No. 8 may be smaller than the initial state of the device.

Therefore, by operating the brake force variation operation lever 511 in accordance with the use period of the apparatus and adjusting the brake force, it is possible to prevent the print deterioration due to white stripes without largely changing the load on the LF motor. be able to.

Next, referring to FIGS. 6 and 7, a scale portion 512 of the brake force variation operation lever 511 according to the present invention will be described.
Configurations of the second and third embodiments will be described.

FIG. 6 is an enlarged view of the vicinity of the brake force variation operation lever 511 according to the second embodiment, and FIG.
It is an enlarged drawing near the brake force fluctuation | variation operation lever 511 which is a 3rd embodiment.

In the above-described first embodiment, the scale 51 provided near the brake force variation operation lever 511 is provided.
Although the scale is merely engraved as the index of No. 2, as shown in FIGS. 6 and 7, the scale 512 is provided on the scale 512 so that the user can adjust the braking force according to the use condition of the device. The brake force change operation lever 511
May be provided as an index.

That is, FIG. 6 showing the second embodiment.
In FIG. 7, indices from "1 year" to "5 years" are provided so that the braking force can be set in accordance with the use period of the device. In FIG. An index from "20,000 (sheets)" to "100,000 (sheets)" is provided so that the braking force can be set in accordance with the (sheet conveyance number). This is a guide for setting when operating the fluctuation operation lever 511.

Further, as a fourth embodiment, there are provided means for storing the use history of the apparatus, and use history display means for displaying the stored use history, and the scale 512 is displayed by the history display means. Alternatively, a configuration having an index related to such information may be adopted.

That is, the usage history of the apparatus, for example, the total number of conveyed sheets is counted, and a specific number (2
When the number of sheets reaches 10,000, 40,000, 60,000,...), The information is displayed on the operation display unit 21 shown in FIG.
The user of the apparatus adjusts the brake force variation operation lever 511 to the index of the scale 512 based on the information, so that an appropriate braking force is applied to the transport roller 8.

In the above-described embodiment, a recording apparatus of an ink jet recording system is exemplified as a recording apparatus provided with a sheet conveying apparatus to which the present invention is applied. However, the present invention is not limited to this. The present invention can be applied to a recording apparatus of a thermal transfer recording method, a thermal recording method, a wire dot recording method, or another recording method.

It is not necessary to limit to the serial recording method, and a so-called line recording method may be used.

Further, in addition to those used as image output terminals of information processing equipment such as the above-mentioned computers, a copying apparatus combined with a reader or the like, or a facsimile apparatus having a transmission / reception function may be used. .

Further, in the above-described embodiment, as the recording means, an ink jet recording head and an ink tank for supplying ink to the recording head are integrally formed and mounted on the head mounting portion. It is not limited to, for example, an ink jet recording head and an ink tank are separate bodies, and the ink jet recording head has an ink tank holder for mounting the ink tank and is mounted on the head mounting portion, Alternatively, an ink tank may be provided in the main body of the recording apparatus, and only the ink jet recording head may be mounted on the head mounting portion.

The ink jet recording head mounted on the head mounting section is mounted on a carriage serving as a head mounting section, and reciprocates in a direction intersecting the transport direction of a recording medium arranged in a recording area, and moves from one line to one line. It is not limited to a so-called serial type ink jet recording head that performs line recording of a plurality of lines, and a so-called full line type ink jet in which ink ejection ports are arranged over the entire width of the recording medium in a direction intersecting the conveying direction of the recording medium arranged in the recording area. It includes a recording head.

Further, the above-mentioned recording means includes an ink jet recording head capable of discharging some or all of a black ink liquid, a yellow ink liquid, a magenta ink liquid, a cyan ink liquid, or a pretreatment liquid. It may be something.

Further, the above-described ink jet recording head further arranges an electrothermal converter in a liquid passage communicating with the ink discharge port, and discharges ink or the like from the ink discharge port using heat energy generated by the electrothermal converter. Alternatively, a piezoelectric element may be disposed in the liquid path, and ink or the like may be ejected from an ink ejection port using vibration or volume change of the piezoelectric element.

[0076]

As described above, according to the present invention, the conveying means for conveying the sheet, the pressing means for pressing the sheet against the conveying means, and the pressing means for pressing the sheet against the conveying means. A pressing force applying means for applying a pressing force, and a resistance applying means for applying a resistance to the operation of the conveying means in a conveying direction, wherein a magnitude of a resistance applied to the conveying means by the resistance applying means is adjusted. It is possible to change, or the magnitude of the resistance generated by the resistance applying means is configured to be changed by operating the resistance changing operation means that interlocks the resistance applying means, so that the sheet The energy generated by the so-called kicking phenomenon due to the thickness and the strength of the stiffness can effectively suppress the force that the transport means tries to rotate more than the specified amount. Kill. Therefore. The image quality can be prevented from deteriorating due to white streaks due to the kicking phenomenon without increasing the cost and space due to the provision of a powerful motor.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a state in which an ASF is mounted on an inkjet recording apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main configuration of the ASF of FIG. 1 in a two-bin configuration.

FIG. 3 is a block diagram illustrating a configuration of a control system of the inkjet recording apparatus according to the embodiment of the present invention.

FIG. 4 is a side cross-sectional view of a recording apparatus having a configuration of a brake unit according to the first embodiment.

FIG. 5 is a partial front view for explaining a brake force variation operation means.

FIG. 6 is an enlarged view of the vicinity of a brake force variation operation lever according to a second embodiment.

FIG. 7 is an enlarged view of the vicinity of a brake force variation operation lever according to a third embodiment.

FIG. 8 is a side sectional view schematically showing a configuration of a recording medium transport mechanism of a conventional recording apparatus.

FIG. 9 is a side cross-sectional view schematically showing the kicking phenomenon (showing immediately before the rear end of the cut sheet comes off the pinch roller).

FIG. 10 is a side cross-sectional view schematically showing the kicking phenomenon (showing a state immediately after the rear end of the cut sheet comes off the pinch roller).

FIG. 11 is a side cross-sectional view of a recording apparatus equipped with a configuration of a brake unit which is an over-rotation phenomenon prevention unit in a conventional proposed embodiment.

FIG. 12 is an enlarged view of the brake means of FIG. 11;

[Explanation of symbols]

 Reference Signs List 4 inkjet recording head 6 pinch roller 8 transport roller 9 auxiliary roller 21 operation display section 50 brake means 511 brake force fluctuation operation lever 512 scale section

Claims (10)

[Claims] 1. A sheet conveying device capable of conveying a cut sheet, a conveying unit for conveying the sheet, a pressing unit for pressing the sheet against the conveying unit, and a pressing unit for pressing the sheet against the conveying unit. A pressing force applying unit for applying a pressing force for pressing the sheet; and a resistance applying unit for applying resistance to the operation of the conveying unit in the conveying direction, wherein the pressing unit is provided to the conveying unit of the resistance applying unit. A sheet conveying device capable of changing the magnitude of the resistance. 2. The sheet conveying device according to claim 1, wherein the magnitude of the resistance generated by the resistance applying unit changes by operating a resistance changing operation lever that interlocks the resistance applying unit. . 3. The resistance change unit includes a pressing member that generates a load by pressing the resistance member against the conveyance unit, and an urging unit that generates a pressing force that presses the pressing member against the conveyance unit. The operating lever changes the biasing force of the biasing means.
3. The sheet conveying device according to any one of claims 1 to 2. 4. A scale section having an index related to the magnitude of resistance generated by said resistance applying means is provided near an operation section of said resistance change operation lever. Sheet conveying device. 5. A device for storing use history of a device, and use history display means for displaying the stored use history, wherein the scale section has an index related to information displayed by the history display means. 5. The method according to claim 1, wherein:
3. The sheet conveying device according to 1. 6. The sheet conveying apparatus according to claim 1, wherein the conveying unit is driven from a driving source via a gear train. 7. A recording apparatus comprising: the sheet conveying apparatus according to claim 1; and recording means for performing recording on a sheet conveyed by the sheet conveying apparatus. 8. The recording apparatus according to claim 7, wherein the recording apparatus performs recording on the sheet using ink ejected from an ink ejection port provided in the recording unit. 9. The recording apparatus according to claim 8, wherein the recording unit includes, as an element for generating thermal energy for ink ejection, an electrothermal converter for generating thermal energy for causing film boiling of the ink. Recording device. 10. The recording device according to claim 9, wherein said recording means has more than 64 ink ejection ports.
The recording device according to claim 1.