JPH03284547A - Automatic paper feeder - Google Patents

Abstract

PURPOSE:To smoothly draw out a recording sheet, even when feed rollers are stopped, by using a half moon-shaped roller, whose section has equal and unequal radius surfaces, as the feed roller and rotatably supporting free rotary rollers, capable of contact with the recording sheet, with a supporting shaft set up in parallel with a paper feed shaft. CONSTITUTION:A supporting shaft 301 in parallel with a paper feed shaft 52 is provided in its sheet feed direction rear side, and free rotary rollers 302A, 302B, adjacent to feed rollers 53A, 53B, are rotatably supported in each position corresponding respectively to these feed rollers 53A, 53B on the supporting shaft 301. A position and an outside diameter of the free rotary roller 302 (general term of 302A and 302B) are selected so as to form a peripheral surface, which is a little separated(little retracted) from a paper feed surface outside diameter (equal radius surface) and placed near (protruded) from a notched part (unequal radius surface) of the feed roller 53 (general term of 53A and 53B), relating to a mounted recording sheet 54.

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a method for processing stacked recording sheets (cut sheets),
-Relates to an automatic paper feeding device for separating sheets one by one and feeding them to a processing section such as a recording section.

[Prior Art] Recording devices such as printers, copiers, and facsimile machines print images on recording sheets (recording materials) such as paper or thin plastic plates by driving energy generators in recording heads according to recorded information. It is configured to record.

The above recording device is an inkjet type,
It can be divided into wire dot type, thermal type, laser beam type, etc.

In addition to plain paper, the recording sheets used in the recording apparatus include thick paper such as postcards and envelopes, and special sheets such as thin plastic plates.

Recording sheets can be fed manually or automatically by an automatic paper feeder.

The automatic paper feeding device generally includes a paper feeding drive unit that rotates a feeding roller to feed out the recording sheets, and a sheet stacking unit that stacks and holds the recording sheets, and feeds the recording sheets in synchronization with the conveyance system of the recording device. The recording sheet is configured to be separated and fed one by one by driving the paper feed drive section.

In addition, automatic paper feeding devices include a built-in type that is built into a recording device, and an external type that is detachably attached.

The automatic paper feeding device as described above includes a feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate that can stack a plurality of recording sheets, and a sheet stacking plate that urges the sheet stacking plate toward the feeding roller. Accordingly, there is known a structure having a spring biasing means that can press the recording sheet against the feeding roller, and a bank separation means consisting of a running slope disposed in front of the feeding roller in the feeding direction. ing.

[Technical Problem to be Solved by the Invention] Incidentally, in an automatic sheet feeding device that uses the bank separation means described above, unlike the case in which separation claws are used, the stacked sheets are always pressed against the feeding roller. It is necessary to keep it.

The reason for this is that when the pressing force is insufficient or disappears, the two sheets below the edge lift up and ride on the slope, making it difficult to separate just one sheet. This is because the second and subsequent sheets are likely to be dragged out by the second sheet, and this causes double feeding of recording sheets.

On the other hand, in order to reliably draw in the recording sheet with the conveyance roller of the recording apparatus, it is necessary to eliminate or minimize the frictional resistance (brake) when the conveyance roller stops.

Therefore, in conventional automatic paper feeding devices of this type, in order to satisfy the above conditions, a driving force transmission mechanism (transmission mechanism) of the feeding roller is used.
A one-way clutch was installed.

Japanese Patent Publication No. 5B-66 discloses this type of prior art.
No. 33, JP 60-25776, JP 63-67
There are issues such as No. 477.

However, this configuration in which a one-way clutch is provided has a problem that the structure is complicated and large, and the cost is high.

The present invention has been made in view of such technical problems, and even when using a bank separation means, it does not require a complicated structure such as a one-way clutch in the feeding roller drive system, and is simple and compact. It is an object of the present invention to provide an automatic paper feeding device that can reliably separate stacked sheets one by one with an inexpensive configuration and can smoothly pull out recording sheets even when a feeding roller is stopped.

[Means for solving problems]

The present invention includes a feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate capable of stacking a plurality of recording sheets, and a sheet stacking plate that loads the recording sheets by urging the sheet stacking plate toward the feeding roller. In an automatic paper feeder, the feed roller includes a spring biasing means that can be pressed against the feed roller, and a bank separation means that is disposed in front of the feed roller in the feeding direction and includes a running slope. A half-moon roller having an equal radius surface and an unequal radius surface is used, and a support shaft installed parallel to the paper feed shaft has a circumferential surface slightly apart from the equal radius surface with respect to the stacked recording sheets. In addition, by adopting a configuration in which a freely rotating roller that can come into contact with the recording sheet is supported, a complicated structure such as a one-way clutch is not required in the feeding roller drive system, and the configuration is simple, compact, and inexpensive. To provide an automatic paper feeding device that can reliably separate stacked sheets one by one and can smoothly pull out recording sheets even when a feeding roller is stopped.

Another aspect of the present invention includes a feeding roller that rotates together with a paper feeding shaft;
a sheet stacking plate capable of stacking a plurality of recording sheets; a spring biasing means capable of pressing the recording sheet against the feeding roller by biasing the sheet stacking plate toward the feeding roller; an automatic sheet feeding device comprising a bank separating means consisting of a running slope disposed in front of the feeding roller in the feeding direction, wherein the feeding roller is a half-moon-shaped roller having a cross section of an equal radius surface and an uneven radius surface. By arranging a guide member near the feed roller that is slightly lower than the equiradial surface and that can come into contact with the recording sheets on the sheet stacking plate, the feed roller drive system has a one-way system. An automatic paper feeder that does not require a complicated structure such as a clutch, has a simple, small, and inexpensive configuration, and can reliably separate stacked sheets one by one, and can smoothly pull out recording sheets even when the feeding roller is stopped. It provides:

〔Example] Hereinafter, the present invention will be specifically described with reference to the drawings.

FIG. 1 is a front view of an embodiment of the automatic paper feeder according to the present invention, taken along line 1-■ in FIG. 2, and FIG. 2 is a cross-sectional view taken along line 3 is a cross-sectional view of the automatic paper feeder of FIG. 1 installed in a recording apparatus, and FIG. 4 is a plan view of FIG. 3.

In FIGS. 1 to 4, the frame 51 of the automatic paper feeder 50
has an integral structure, with a gear box part 51A on the left side and a sheet stacking plate support part 51B on the middle part.
However, a cover portion 51C is formed on the right side portion.

The paper feed shaft 52 passes above the sheet stacking plate support section 51B, and its both ends are connected to the gear box section 51A and the cover section 5.
1C and is rotatably supported.

Two feed rollers 53 (53A and 53B) are attached to the paper feed shaft 52 so as to rotate together, and in the illustrated example, one feed roller 53A rotates the sheet along the shaft 52. The other feeding roller 5 is mounted so as to be movable in the width direction.
3B is fixed to the shaft 52.

A plurality of recording sheets (sheets capable of loading sheet dates 54) 1 are mounted on the sheet stacking plate support portion 51B of the frame 5■.
The mounted Fi55 is stably held so that it can move in the vertical direction,
The sheet stacking plate 55 is connected to the feeding roller 53 by a pressure spring 56 (FIG. 2) mounted between the sheet stacking plate 55 and the frame 51.
It is energized toward A and 53B.

Therefore, the recording sheets 54 stacked on the sheet stacking plate 55 are moved to the feeding roller 5 by the spring 56.
3A and 53B are always energized.

When using sheets of different sizes as the recording sheet 54, or depending on whether sheets of the same size are fed vertically or horizontally, the position of the feeding roller 53A can be adjusted in conjunction with a sheet guide 65, which will be described later. has been done.

In front of the feeding rollers 53 (generic symbols 53A, 53B) in the feeding direction or at a position adjacent to the front end of the sheet stacking plate 55, there is a bank separation consisting of a slope on which the uppermost recording sheet 54 can ride. Means 57 are provided.

In this embodiment, the bank separation means 57 is formed in part with the frame 51.

As the feeding roller 53, a half-moon-shaped roller whose cross section has a half-moon shape (or D-shape) having an equal radius surface and an uneven radius surface is used.

The equal radial surface is a circumferential surface that presses against the recording sheet 54 to feed the recording sheet, and the unequal radial surface is a peripheral surface that presses against the recording sheet 54 and feeds the recording sheet, and the unequal radial surface is a peripheral surface that presses against the recording sheet 54 and feeds the recording sheet, and the unequal radial surface is a peripheral surface that presses against the recording sheet 54 and feeds the recording sheet, and the unequal radius surface is a peripheral surface that presses against the recording sheet 54 and feeds the recording sheet. This is the peripheral surface away from the recording sheet 54.

The automatic paper feeder 50 of this embodiment is externally attached to the recording apparatus 10 and is driven using power from a conveyance roller drive source of the recording bag W10.

On the rear side of the paper feed shaft 52 in the sheet feeding direction, the paper feed shaft 5
A support shaft 301 parallel to 2 is provided.

Both ends of the support shaft 301 are held by the gear box portion 51A and the cover portion 51C of the frame 51, and the support shaft 301 is normally attached in a fixed state.

At positions corresponding to the feed rollers 53A and 53B on the support shaft 301, free rotation rollers 302A and 302B adjacent to these feed rollers are rotatably supported.

One freely rotating roller 302A is the corresponding feeding roller 5
3A along with the shaft 301 in the sheet width direction, and the other freely rotating roller 302B is rotatable with respect to the shaft 301 but is mounted at a fixed position in the sheet width direction.

FIG. 5 is a horizontal cross-sectional view of the feed roller 53A on the paper feed shaft 52 and the freely rotating roller 302A on the support shaft 301, and FIG. 6 is a horizontal sectional view taken along the line Vl-Vl in FIG. FIG. 7 is an end view taken along the line ``---'' in FIG. 5.

In FIGS. 5 to 7, the feeding roller 53A includes a boss portion 58 formed of hard plastic or the like and fitted onto the paper feed shaft 52, and a rubber layer fixed to the outer peripheral surface of the boss portion by adhesive or the like. It consists of 59.

As described above, the peripheral surface of the feeding roller including the rubber layer 59 is a uniform radius surface that generates feeding force and the recording sheet 54.
There is an unequal radius surface that separates from , and its cross-sectional shape is
As shown in the figure, it has a half-moon shape or a D shape, with a part of the arc cut off by a chord.

The boss portion 58 is integrally formed with the paper feed shaft 52 by engaging and fitting an axial protrusion 60 formed on the inner diameter surface with an axial groove 61 formed on the paper feed shaft 52. It is attached so that it can rotate and slide within a predetermined range in the axial direction.

The boss portion 58 is provided with a cylindrical portion 62 having a smaller diameter than the feeding roller portion and extending in the axial direction concentrically with the paper feeding shaft 52,
A circumferential groove 63 is integrally formed in the first cylindrical portion 62 and is engaged with a seat guide 65 so as to be able to move up and down.

On the other hand, a free rotation roller 302A is rotatably supported on a support shaft 301 arranged parallel to the paper feed shaft 52, adjacent to the feed roller 53A.

This free rotation roller 302A is also formed with a boss portion 303 extending in the axial direction, and the boss portion 303 has a retaining circle with which the vertical notch 304 of the sheet guide 65 is slidably engaged. A circumferential groove 305 is formed.

The sheet guide 65 is for guiding the side surface of the recording sheet 54 on the sheet stacking plate 55, and is attached to the sheet stacking plate 55 so that its position can be adjusted in the sheet width direction.

In this way, the feeding roller 53A and the free rotation roller 302A are mounted so as to always move in the sheet width direction with a constant positional relationship via the sheet guide 65.

The free rotating rollers 302 (302A and 302B
The position and outer diameter of the stacked recording sheets 5
4, it is slightly apart (slightly retracted) from the outer diameter (equal radial surface) of the paper feeding surface of the feeding roller 53 (53A and 53B collectively), and further away from the notch (unequal radial surface) of the feeding roller. It is chosen to form a close (protruding) circumferential surface.

The free rotation roller 302 is made of a material with a relatively small coefficient of friction, such as hard plastic.

Further, as will be described later with reference to FIGS. 18 and 19, the sheet guide 65 is attached to the sheet stacking plate 55 so as to be movable (slidable) over a predetermined range in the sheet width direction.

Note that the sheet guide 65 is connected to the sheet stacking plate 55.
In addition, the feeding roller 53 and the free rotation roller 3
02 (up and down in the example shown),
The front end 113 that engages with the circumferential groove 63 is formed substantially vertically so as to properly engage regardless of the vertical position of the sheet stacking plate 55 (the stacking height of the recording sheets 54).

For the same reason, the notch 30 of the sheet guide 65
4 is also formed substantially vertically.

The feed roller 53B and free rotation roller 302B on the right side in FIG. 1 are attached to fixed positions on the paper feed shaft 52,
The feeding roller 53A and the free rotation roller 3 explained above
It has a structure that is substantially symmetrical to 02A.

However, since the feed roller 53B is fixed to the paper feed shaft 52 and the freely rotating roller 302B is rotatable to the support shaft 301, but its axial position is restricted, in the illustrated example, the circumferential grooves 63 and 305 are omitted, and the portions corresponding to the boss portions 58 and 303 are correspondingly reduced.

Further, the function corresponding to the sheet guide 65 is the function of the frame body 5.
It is configured to be exerted on the inner wall surface of the cover portion 51C of No. 1.

Note that the right feeding roller 53B and the free rotation roller 3
02B can be position-adjustable, and a sheet guide 65 or a component equivalent thereto can be provided on the right side as well, so that it can be configured symmetrically.As described above, the automatic paper feeder according to the present invention, that is, the paper feeder Feed rollers 53A and 53B that rotate together with the shaft 52, and a sheet stacking plate 5 that can stack a plurality of recording sheets 54.
5, and the sheet stacking plate 55 is connected to the feeding rollers 53A, 5.
a spring biasing means 56 that can press the recording sheet 54 against the feeding rollers 53A, 53B by urging the recording sheet 54 toward the feed rollers 53A, 53B; In the automatic paper feeder comprising: a bank separation means 57 consisting of the feed roller 53;
A half-moon-shaped roller having a cross section of an equal radius surface and an uneven radius surface is used as a support shaft 301 installed parallel to the paper feed shaft 52, and a roller that is slightly away from the equal radius surface with respect to the stacked recording sheets is used. An automatic paper feeder 50 is configured, which is characterized by pivotally supporting freely rotating rollers 302A and 302B which have a rotation and can be brought into contact with the recording sheet 54.

The automatic paper feeder i! according to the embodiment of the present invention described above. 50 is detachably attached to the recording unit 210 and is a drive source for the recording device 10 (for example, a motor for driving a sheet conveying means).
It is driven in synchronization with the sheet conveyance roller using the

The recording device 10 is used in an upright position as shown in FIGS. 3 and 4 when the automatic paper feeder 50 is attached, and when used alone without the automatic paper feeder 50 attached. ,
As shown in FIG. 8, it can also be used horizontally.

A schematic configuration of the recording apparatus 10 will be explained using FIG. 3 and FIG. 8.

3 and 8, a recording device (for example, a recording device that uses a bubble jet recording method and forms an image using a recording liquid that uses thermal energy to form droplets of the recording liquid) 10 A sheet insertion opening 11 and a sheet ejection opening 12 are formed on the upper surface (the front side in a standing position),
The recording sheet inserted through the sheet insertion opening 11 is brought into close contact with the circumferential surface of the platen roller 14, which also serves as a sheet conveyance roller, and is conveyed in the direction of arrow A along a recording sheet conveyance path formed in a substantially U shape, and then passed through the recording head. The sheet is recorded while passing through the recording section facing the recording section 15, and after recording is discharged upward from the sheet discharge port 12 (to the front in a standing position).

Here, the paper feed tray 16 is pivotally attached to the top surface of the recording device 10 so that it can be opened and closed, and when in use (recording), it opens and functions as a paper feed tray, but when not in use (when storing, etc.). ) is set in the closed position as shown by the solid line in FIG.
It functions as a cover 16 that covers and protects the upper surface of the.

In FIG. 3, the recording gutter 15 is connected to the platen roller 1.
It is mounted on a carriage 22 that reciprocates along a guide axis 21.21 parallel to 4.

Note that the illustrated recording gutter 15 is an inkjet head, and is configured integrally with an ink tank.

On the upstream side of the recording head 15 in the conveying direction, there is a sheet pressing member 2 for pressing the recording sheet against the platen roller 14.
3 is placed.

This sheet pressing member 23 is pressed against the peripheral surface of the platen roller 14 by a spring (not shown).

Further, the pressing force of the sheet pressing member 23 can be released by operating a lever or the like.

Furthermore, a spur 26 and a paper ejection roller 27 are provided at the sheet ejection port 12 to assist in ejecting the recording sheet.

FIG. 14 is a diagram showing the bottom surface of the recording apparatus 10 (the back surface on which the automatic paper feeder 50 is attached in the upright position).

A second sheet insertion port 28 is formed on the back side of the recording device 10, and the sheet is transferred from this insertion port 28 to the recording section between the gutter 15 and the conveyance roller (platen roller) 14 to the sheet discharge port 12. A substantially linear second recording sheet transport path leading to the recording sheet is configured to extend substantially horizontally.

This second recording sheet conveyance path can be used when the recording apparatus 10 is upright, and is not curved.
This has the advantage that even stiff recording sheets, such as thick sheets such as postcards and envelopes, or special sheets such as plastic sheets, can be easily fed.

In this upright position, as shown in Figures 3 and 4,
The automatic paper feeder 50 is detachably attached, and the recording sheets 54 are automatically fed one by one from the sheet insertion slot 28 on the back (when erected).

Therefore, the automatic paper feeder 50 has an entrance (sheet insertion slot) 2.
8 to feed the recording sheet 54 into this linear conveyance path, and
It is removably attached to the opening surface of the

When the automatic paper feeder W50 is installed in the recording apparatus 10, in the illustrated example, the paper feed tray 16 is set in the open position as shown by the dotted chain line in FIG. 3, and in that case, it is used as a paper output tray. be done.

The recording sheet 54 fed from the automatic paper feeder 50 through the sheet insertion hole 28 first passes through the conveyance roller 14.
and the sheet pressing member 23, and is fed to a sheet feeding position (usually a cueing position) by the conveying roller 14 and feeding roller 53, which rotate synchronously at a circumferential speed.

After the half-moon-shaped feeding roller 53 returns to the initial position and the sheet feeding force is released, the recording operation is started, and recording is performed on the recording sheet 54 while being conveyed by the conveying roller 14.

The recording sheet 54 sent by the conveyance roller 14 is transported by a paper ejection roller 27 and a spur 26 disposed near the sheet ejection port 12.
Thereafter, the sheet is conveyed by the conveyance roller 14 and the discharge roller 27, which are driven synchronously.

This paper ejection roller 27 is also driven in synchronization with the transport roller 14 at a circumferential speed, and during the subsequent recording operation, the recording sheet 54 is transported by the transport roller 4 and the paper ejection roller 27. The recorded recording sheet 54 is discharged onto a paper discharge tray 16 (a cover that also serves as a paper feed tray of the recording apparatus 10).

Note that when the recording sheet 54 is pulled out or conveyed by the conveyance roller 14 or the conveyance roller and the paper ejection roller 27, the recording sheet 54 is
Even if there is, the recording sheet 54 at this time is in pressure contact only with the rotatable freely rotating roller 302 and is away from the feeding roller 53, so the recording sheet 54 can be pulled out with almost no resistance. It is possible to eliminate the braking action during conveyance of the recording sheet, and also to prevent double feeding of the second and subsequent sheets.

When the automatic paper feeder W50 is attached to the recording device 10,
A gear (output gear from the recording device 10) 71 fixed to the shaft of the sheet conveyance roller 14 meshes with a manual gear 72 provided in the gear box 51A of the automatic paper feeder 50 (FIGS. 1 and 3).

Therefore, the input gear 72 is rotationally driven in synchronization with sheet conveyance of the recording apparatus 10.

The rotation of this input gear is transmitted to a gear (clutch gear) 74 on the paper feed shaft 52 via a gear 73.

Here, a rotary spring clutch 75 is provided between the gear 74 and the paper feed shaft 52.

This one-turn spring clutch 75 operates as follows.

That is, in conjunction with a small amount of reverse rotation (rotation in the opposite direction to the conveyance direction) of the sheet conveyance roller (platen roller) 14 based on a paper feed signal, the rotary spring clutch 75 causes the feed roller 53 to perform recording. The rotation is reversed at the reference position or initial position away from the sheet 54, and the movement at the time of this reversal releases the locking with the control means such as the control lever (hook) for preventing rotation in the recording direction, and the spring clutch 75 is turned off from the OFF position. Switched on.

Note that even when the feeding roller 53 is separated from the recording sheet 54, the free rotation roller 302, which has a perfect circular cross section, is in pressure contact with the recording sheet 54 at a position adjacent to the feeding roller 53.

Convey roller (platen roller) 1 with clutch on
By rotating the feed roller (D-shaped roller or half-moon roller) 53 by a predetermined amount of rotation in the recording direction of 4, one recording sheet 54 is separated and pulled into the platen roller 14. When the paper is fed to a position beyond the recording sheet and returns to the initial position (a position where a gap is created between the feeding roller 53 and the recording sheet 54), the control means is again locked at the recording direction rotation prevention position, The spring clutch 75 is turned off to interrupt the interlock between the platen roller 4 and the feeding roller 53, and the feeding roller 53 is stopped.

In this way, only 54 recording sheets are separated and fed during one rotation of the feeding roller 53 (paper feeding shaft 52).

FIG. 9 is a longitudinal sectional view showing the structure of the one-rotation spring clutch 75, and FIGS. 10 to 13 are views showing the control lever (control means) and control ring in FIG. 9.

One-turn spring clutch 7 attached to the paper feed shaft 52
5 includes a boss portion (winding body portion) 76 that is integral with the clutch gear (input gear) 74, a coiled clutch spring 77, a clutch drum 78, and a control ring 79.

Further, as shown in FIGS. 10 to 13, the control ring 7
At 9, a control means (control lever) 80 for controlling the clutch operation is connected to a control spring 8.
1 in the radial inward direction and in the axial direction.

The clutch drum 78 is fixed to the paper feed shaft 52 by a parallel pinch or the like, and rotates integrally therewith.

On the other hand, the clutch gear 74 including the boss portion 76 is connected to the paper feed shaft 5.
2 is rotatably fitted. A clutch spring receiver is provided on the circumferential surfaces of the boss portion 76 and the clutch drum 78, and a coiled clutch bar 277 is installed astride both.

One end of the clutch spring 77 is engaged with a hole 82 formed in the clutch drum 78, and is constantly connected to the clutch drum 78.

The other end of the clutch spring 77 is hooked onto a notch 83 formed in a control ring 79 that is rotatably fitted around the outer periphery of the clutch spring 77 .

The control ring 79 has a shape as shown in FIGS. 10 to 13, and the left rotation in the plan view of FIG. 10 corresponds to the paper feeding direction of the feeding roller 53.

The control lever 80 is rotatably fitted to a shaft 84 provided in the gear box portion 51A of the frame 51, and as shown in FIGS. 11, and is biased inward in the axial direction (to the right in FIG. 11) and in the radial direction.

In the paper feeding standby state (the reference non-contact position of the feeding roller 53), the control lever 80 is caught in the notch 85 of the control ring 79 and stopped.

At this time, the recording sheet 54 is attached to the free rotation roller 302.
A and 302B are pressed together.

When a paper feeding command is received from the control unit, the conveyance roller 14 is first reversed by a predetermined amount, and in synchronization with this, the control ring 7 is
9 is rotated by a predetermined number of steps in the reverse rotation direction (that is, clockwise rotation direction).

The rotation at this time is to reversely rotate the conveying roller 14 and rotate the clutch gear 74 in the direction in which the clutch spring 77 wrapped around the boss portion (winding body portion) 7G is loosened. , the paper feed shaft 52 is the recording sheet 5
Since there is no load such as contact with the clutch spring 77, the initial tightening torque of the clutch spring 77 acts, the rotation of the clutch gear (transmission means) 74 is transmitted, and the spring end of the clutch spring 77 is hooked. The ring 79 rotates in the opposite direction by a predetermined number of steps.

This reverse rotation of the control ring 79 causes the control lever 80 to move radially outwards of the control ring along the ramp 86 of the notch 85 of the control ring 79 and to slide along the surfaces 87,88.

Next, the control ring 79 is rotated approximately one rotation in the forward direction.

That is, when the clutch gear 74 is rotated in the forward direction in synchronization with the rotation of the conveyance roller 14, the clutch spring 77 wound around the boss portion 76 is rotated in the direction of tightening, and the boss portion 76 and the clutch The spring 77 and the clutch drum 78 rotate integrally, and the torque is applied to the paper feed shaft 5.
2 and the feeding roller 53, and are rotationally driven in the forward direction.

At the same time, the control ring 79 engaged with one end of the clutch spring 77 is also rotated in the same direction.

Due to the rotation at this time and the biasing force of the control spring 81, the control lever 80 moves onto the surface 88 and is pressed against the surface 87, so that the control lever 80 moves onto the surface 88 and is pressed against the surface 87.
slide along.

This forward rotation drives the feeding roller 53 and starts feeding the recording sheet 54.

When the control lever 80 is rotated forward by a predetermined angle, the control lever 80 first descends to the surface 89 by the slope 93 and then guided by the surface 94 to come into contact with the surface 89. When the control lever 80 is rotated further forward, the tip of the control lever 80 comes into contact with the control ring 79. The control ring 79 is caught in the notch 85 and stops rotating.

That is, when the control lever 80 is rotated forward by a predetermined angle, the control lever 80 is first dropped onto the surface 89 by the slope 93, and then the control lever 80 is dropped onto the surface 89.
．． 89 at a predetermined angle.

Upon further rotation in the forward direction, the control lever 80 is lifted along the ramp 94 and then slides along the surface 89,90.

When it further rotates forward and rotates once, it fits into the notch 85 formed at the position where it collides and falls from the surface 89.90, and is locked in the notch 85, and the rotation of the control ring 79 is stopped. do.

By stopping the control ring 79, the one-turn spring clutch 75 is brought into the clutch-off state again.

To summarize the above movements, the initial reverse rotation of the control ring 79 (a predetermined number of pulses) triggers the paper feed to rotate the feed roller 53 once, and from there, the control ring 79 rotates once in the forward direction. In the meantime, the feed roller 53 is rotationally driven, and when the feed roller 53 and the control ring 79 have made one rotation and returned to the initial position, the control lever 80 is fitted into the notch 85 again and the clutch is off. , the feeding roller 53 stops at the reference position.

In this way, the feeding roller 53 rotates once in synchronization with the conveying roller 14, and the paper feeding operation is completed.

The number of pulses of the reversal trigger described above is determined by the fact that when the feed roller 53 rotates in the reverse direction due to the rotation of the motor for driving the conveyance roller of the recording device 10, the control lever 80 moves along the slope portion 86 of the control ring 79. In addition, the feed roller 53 should not interfere with other parts, such as the recording sheet 54, and cause adverse effects such as sheet displacement. Good to have.

According to the one-rotation spring clutch 75 described above, the feeding roller 5
Since the recording sheet 54 is controlled to rotate reliably once, in the sheet feeding standby state, the recording sheet 54 is at a position protruding in the feeding direction from the predetermined initial position, that is, the bank separation means 57
The recording device 1 is brought into a position beyond the
It is possible to prevent the required amount of feed into 0 from decreasing.

That is, even if the paper feeding is completed before the feeding roller 53 makes one revolution, the control ring 79 returns to the initial position after that due to the setting range of the equal radial surface that is pressed against the recording sheet 54.
Furthermore, even after the rotation of the feeding roller 53 is stopped, the drive source continues to rotate to pull out the recording sheet 54, so the rotation of the control ring 79 is insufficient and the engagement with the control lever 80 becomes uncertain. Therefore, the control ring 79
is always at the initial position (the half-moon or D-shaped cutout faces the recording sheet 54 without contacting it, and the freely rotating roller 3
02 is controlled so that it returns to the position where only the recording sheet 54 is pressed against the recording sheet 54.

Furthermore, even if misalignment or slippage occurs and a paper feeding error is about to occur, the paper can be re-feeded reliably.

Next, a detachable coupling structure between the recording device 10 and the automatic paper feeder 50 will be described.

14 is a rear view showing the mounting surface of the automatic paper feeder of the recording apparatus 10, the 15th is a perspective view showing the mounting surface (front) of the automatic paper feeder 50, and FIG. 16 is a rear view showing the mounting surface of the automatic paper feeder 50. FIG. 5 is a horizontal cross-sectional view showing a state in which the automatic paper feeder 50 and the automatic paper feeder 50 are connected;
FIG. 17 shows a state in which the lock is released from the state shown in FIG. 16.

First, on the back side of the recording device 10, as shown in FIGS. 14, 16, and 17, the output gear 71 that rotates in synchronization with the platen roller 14 is supported.
As shown in FIGS. 15 to 17, the input gear 72 capable of transmitting rotational force to the feed roller 53 (paper feed shaft 52) is pivotally supported on the mounting surface side of the automatic paper feed bag N50. By meshing these gears 71 and 72 at the time of coupling, the driving force of the feeding roller 53 is transmitted to the automatic paper feeding device.

A frame member 35 that supports bearing parts such as the platen roller 14 and the sheet conveyance motor 34 is provided inside the recording apparatus 10, and the case portion is attached to the frame member 35.

The automatic paper feed bag [50 has a lever 101 and a tip hook 10
A hook member 103 having a diameter of 2 is attached to be swingable and movable by a predetermined amount in the front and rear directions, and this hook member 103 is urged inward by a tension spring 104.

On the other hand, the hook 10 of the frame member 35 of the recording bag 210
2, an opening 201 through which the hook 102 enters through the opening of the case is formed, and the hook 102
is adapted to engage with the peripheral edge of the opening 201.

As shown in FIGS. 16 and 17, a bead-shaped portion is formed on the peripheral edge of the opening 201 so that the hook 102 can be smoothly engaged with the hook 102.

When the hook 102 in FIG. 16 is engaged, the tension spring 104 is stretched (for example, 1 to 2 nrm), and the automatic paper feeder 50 is pressed and coupled to the recording device 10 by the spring force.

By pinching and rotating the lever 101, the hook member 103 is unlocked as shown in FIG. 17, and the automatic paper feeder 50 can be removed from the recording apparatus 10.

The pressure contact force in this coupled state is exerted by a total of three contact surfaces.

As shown in Figures 14 to 16, automatic paper feed bag ff50
A first abutting surface I05 and second and third abutting surfaces 106 and 107, which serve as a contact reference surface, are formed on the side. The contact reference surface 105 is connected to the manual gear 7 as shown in the figure.
It is located near 2.

A reference contact surface 202 that is a counterpart surface of this contact reference surface 105
is formed on the frame member 35 having high strength and rigidity,
Its position is selected near the meshing portion of gears 71 and 72.

Further, the hook member 103 that applies pressure contact force of the joint portion
The line of action of the three abutment surfaces 105.10 as shown
6. Considering the position of 107, the position is selected so that stable bonding can be obtained.

Note that the second and third contact surfaces 106 and 107 can also be brought into direct contact with the back surface of the recording device 10.

The press-contacting means consisting of the hook member 103 and the like may be provided at two locations on the left and right in order to further improve the left-right balance.

Further, a positioning pin 2 is provided on the mounting surface of the automatic paper feeder 50.
03.204 are formed and these bins 203.
204 is a positioning hole 2 formed on the back surface of the recording device 10.
05.206, the automatic paper feeding device 50 is positioned with respect to the recording device 10.

In addition, one hole 20 of the positioning holes 205 and 206
5 is a long hole as shown in FIG.

FIG. 18 shows the sheet stacking plate 55 and the sheet guide 6.
5, and FIG. 19 is a plan view showing line XI in FIG. 18.
It is a sectional view along X-XIX.

18 and 19, a guide groove 111 is formed in a predetermined range in the sheet width direction of the sheet stacking plate 55, and a retaining part 112 that can slide along the guide groove 111 is formed at the lower part of the sheet guide 65. has been done.

As shown in FIG. 19, the upper surface of the retaining portion 112 forms the same surface as the upper surface of the sheet stacking plate 55, so that the stacked recording sheets 54 can be stacked on the same surface.

The front end 113 of the sheet guide 65 is connected to the feeding roller 53.
The substantially vertical notch 304 formed in the sheet guide 65 is engaged with the circumferential groove 63 (FIGS. 5 and 7) of the free rotating roller 302A.
Since the sheet guide 65 is slidably engaged with the sheet guide 65,
When moving the paper according to the paper width, the feed roller 53A
The freely rotating roller 302A adjacent thereto also moves at the same time, so that it can always be adjusted to a predetermined position.

FIG. 20 is a front view showing a second embodiment of the automatic paper feeder according to the present invention, and FIG.
22 is a cross-sectional view along line XX I.
FIG.

In this embodiment, the feeding roller 53 and the freely rotating roller 302 are each fixedly arranged at three predetermined positions, and each feeding roller 53 and its shaft (paper feeding shaft) 52 are fixedly arranged at three predetermined positions.
is integrally formed with a plastic mold, etc., and furthermore,
Each freely rotating roller 302 and its shaft (support shaft) 301 are also integrally formed by plastic molding or the like.

Further, the paper feed shaft 52 and the support shaft 30I of this embodiment have a cross-shaped cross section as shown in the figure, and are designed to maintain rigidity and reduce weight.

In this embodiment, a freely rotating roller 302 is disposed in front of the feeding roller 53 in the sheet feeding direction.

Furthermore, since the positions of the feeding roller 53 and the freely rotating roller 302 are fixed, the sheet guide 65 is not engaged with these rollers 53 and 302, and the sheet guide 65 is not engaged with the rollers 53 and 302 on the sheet stacking plate 55. It is attached to the seat so that it can move independently in the width direction of the seat.

This embodiment is different from the embodiments shown in FIGS. 1 to 19 described above in the above points, but other parts have a substantially overlapping structure, and corresponding parts are indicated by the same reference numerals. death,
Detailed explanation thereof will be omitted.

Although the configuration in which the freely rotating roller 302 is disposed behind the feeding roller 53 as in the above-mentioned embodiment is excellent in terms of the sheet holding effect that prevents the recording sheet 54 from floating up on the stacking plate 55, The configuration in which the free rotation roller 302 is arranged in front of the feeding roller 53 as in this embodiment is as follows.
Always keep the loading record sheet 5 close to the bank separation means 57.
Since the floating of the recording sheet 4 is restricted, the separation property of the recording sheet 54 at the start of paper feeding can be further improved.

In addition, the feeding roller 53 and the free rotation roller 302
Although it is possible to arrange them in four or more places, if they are arranged in three places as shown in the figure, for example, it is possible to feed standard sheets such as postcards or cut sheets from either the vertical or horizontal direction. Even in this case, at least two rollers can be brought into pressure contact, and deformation and skew of the recording sheet 54 can be prevented, and stable sheet feeding operation can be performed.

FIG. 23 is a front view showing a third embodiment of the automatic paper feeder according to the present invention, and FIG. 24 is a line XXIV in FIG.
25 is a sectional view taken along line -XXIV, and FIG. 25 is a plan view of FIG. 23.

In this embodiment, the sheet stacking plate 5 is replaced with the free rotation roller 302 in the second embodiment shown in FIGS. 20 to 22.
A guide member 311 that can come into contact with the recording sheet 54 on the top of the recording sheet 54 is provided.

The feeding rollers 53 are fixedly arranged at three predetermined locations in the sheet width direction.

However, in this embodiment, each feeding roller 53 is fixed so as to be immovable in both the rotational direction and the axial direction with respect to the paper feeding shaft 52 which is supported so as to be able to transmit rotational driving force.

That is, each feed roller 53 in this embodiment has substantially the same structure as the paper feed roller 53B in FIG.
are fixed with substantially the same structure.

The guide member 311 is provided in the vicinity of each feeding roller 53 in the sheet width direction in a substantially vertical plate shape.

Further, each guide member 311 is formed integrally with the frame 51 of the automatic paper feeder 50, and in the illustrated example, each guide member 311 is formed so as to connect the gear box portion 51A and the cover portion 51C. It is integrally formed so as to extend rearward from the stay 312.

Further, the shaft (paper feed shaft) 52 of the feed roller 53 is located at a position that passes through each guide member 311. Therefore, each guide member 311 has an opening 3 through which the paper feed shaft 52 is inserted.
13 (Fig. 24) is formed.

Each of the guide members 311 is slightly lower than the equal radial surface (the circumferential surface that presses against and feeds the recording sheet 54) of each of the feeding rollers 53 (flagging from the recording sheet 54) and has an unequal radius surface (
The half-moon portion) is higher (projects toward the recording sheet 54 side) and has a shape and size that allows it to come into contact with the recording sheet 54 on the sheet stacking plate 55.

Furthermore, since the positions of the feeding roller 53 and the guide member 311 are fixed, the sheet guide 65 and these members are separated from each other, and the sheet guide 65 is placed on the sheet stacking plate 55 by itself. It is mounted so that it can be moved in any direction.

Although this embodiment differs from the embodiments shown in FIGS. 1 to 22 described above in the above points, other parts have substantially the same structure, and corresponding parts are designated by the same reference numerals. will be displayed, and their detailed explanation will be omitted.

As described above, the automatic paper feeding device according to the present invention, that is, the feeding roller 53 that rotates together with the paper feeding shaft 52, the sheet stacking plate 55 capable of stacking a plurality of recording sheets 54, and the sheet stacking plate that feeds the sheet a spring urging means 56 which can press the recording sheet against the feeding roller by urging it toward the roller 53; and a bank separation means 57 comprising a slope disposed in front of the feeding roller in the feeding direction. In the automatic paper feeder having the above-mentioned feeding row, a half-moon-shaped roller 53 whose cross section has an equal radius surface and an unequal radius surface.
The recording sheet 54 is placed near the feeding roller and slightly lower than the equiradial surface and on the sheet stacking plate 55.
An automatic paper feeder is constructed in which a guide member 311 that can come into contact with the paper feeder is disposed.

According to this embodiment, compared to the above embodiments, the free rotation roller 302 and its support shaft can be omitted, and the corresponding guide member 311 can be integrally molded with the frame 51, so that the paper feeding device can be made smaller. We were able to reduce weight and cost.

Note that the feeding roller 53 and the guide member 311 can be arranged in four or more places, but if they are arranged in three places as shown in the figure, for example, a fixed shape such as a postcard or a cut sheet can be Regardless of whether the sheet is fed vertically or horizontally, at least two rollers can be brought into pressure contact, and deformation and skew of the recording sheet 54 can be prevented, and stable sheet feeding operation can be performed. I can do it.

FIG. 26 is a front view showing a fourth embodiment of the automatic paper feeder according to the present invention, and FIG. 27 is a line XX-- in FIG. 26.
28 is a sectional view taken along the line XX■, and FIG. 28 is a plan view of FIG. 26.

In this embodiment, the substantially vertical plate-shaped guide member 311 in the third embodiment shown in FIGS. ) is changed to a flat guide member.

In the illustrated example, an opening 314 is formed in the region of the feeding roller 53 of the guide member 311 .

The feed roller 53 is fixedly disposed at a distance of 3 m from the paper feed shaft 52 in the sheet width direction, as in the case of the third embodiment.

That is, each of the three feed rollers 53 is fixed immovably in both the rotational and axial directions with respect to the paper feed shaft 52, which is supported so as to be able to transmit rotational driving force. The feed roller 53 has substantially the same structure as the paper feed roller 53B in FIG. 4, and is fixed to the paper feed shaft 52 with substantially the same structure.

As shown in the figure, each guide member 311 of this embodiment has a shape that can be pressed against the recording sheet 54 on the stacking plate 55 at substantially the same position in the sheet feeding direction as each feeding roller 53 .

The downward curved portion of each guide member 311 is slightly lower than the equal radial surface (the circumferential surface that presses against and feeds the recording sheet 54) of each of the feeding rollers 53 and higher than the unequal radial surface (half-moon portion);
It has a shape and size that allows it to come into contact with the recording sheet 54 on the sheet stacking plate 55.

Further, each guide member 311 is formed integrally with the frame 5 of the automatic paper feed bag W50, and in the illustrated example, the guide member 311 is formed to connect the gear box portion 51A and the cover portion 51C. It is integrally formed so as to extend rearward from the stay 312.

Although this embodiment differs from the embodiments shown in FIGS. 1 to 25 described above in the above points, other parts have substantially the same structure, and corresponding parts are designated by the same reference numerals. , and their detailed explanation will be omitted.

Also in this embodiment, since the positions of all the feeding rollers 53 and the guide members 311 are fixed, the sheet guides 65 are separated from these members, and the sheet guides 65 are separated from the sheet stacking plate. 55 so that it can move independently in the sheet width direction.

Further, the feeding roller 53 and the guide member 311 can be arranged in four or more places, but if they are arranged in three places as shown in the figure, for example, it is possible to Regardless of whether the sheet is fed vertically or horizontally, at least two rollers can be brought into pressure contact, and deformation and skew of the recording sheet 54 can be prevented, and stable sheet feeding operation can be performed. I can do it.

According to each of the embodiments described above, the feeding roller 53 and the stacked recording sheets 54 are released from pressure contact at the reference position, and the freely rotating roller 3 presses the recording sheets at the reference position.
Since the 02 or guy and member 311 are provided on the support shaft 301 separate from the paper feed shaft 52 or on the support shaft 301 alone, the load (pressure force, etc.) on the paper feed shaft 52 at the reference position can be eliminated, and the spring clutch etc. It is possible to improve the drive efficiency when rotating the paper feed shaft 52 through the drive, and further downsize the motor as a drive source, reduce power consumption, and simplify the structure, thereby reducing the size and cost of the company. It has become possible to aim for

〔Effect of the invention〕

As is clear from the above description, according to the present invention, there is provided a feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate capable of stacking a plurality of recording sheets, and a sheet stacking plate that is directed toward the feeding roller. a spring biasing means that can press the recording sheet against the feeding roller by biasing the recording sheet; and a bank diversion means consisting of a slope disposed in front of the feeding roller in the feeding direction. In the paper feeding device, a half-moon-shaped roller whose cross section has an equal radius surface and an unequal radius surface is used as the feeding roller, and a support shaft installed parallel to the paper feeding shaft is used to provide the stacked recording sheets with the Since the configuration is such that a freely rotating roller that has a circumferential surface that is slightly hotter than the equiradial surface and that can come into contact with the recording sheet is supported, a complicated structure such as a one-way clutch is not required in the feeding roller drive system. First, there is provided an automatic sheet feeding device that has a simple, compact, and inexpensive configuration, can reliably separate stacked sheets one by one, and can smoothly pull out recording sheets even when the feeding roller is stopped.

According to another aspect of the present invention, a feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate capable of stacking a plurality of recording sheets, and a sheet stacking plate that is biased toward the feeding roller. In the automatic sheet feeding apparatus, the automatic sheet feeding apparatus includes a spring biasing means capable of pressing the recording sheet against the feeding roller, and a bank separating means formed of a running slope disposed in front of the feeding roller in the feeding direction. A half-moon roller whose cross section has an equal radius surface and an unequal radius surface is used as the feed roller,
A guide member that is slightly lower than the equal radius surface and that can come into contact with the recording sheets on the sheet stacking plate is arranged near the feed roller, so the feed roller drive system does not require a complicated one-way clutch or the like. Provided is an automatic paper feeding device that does not require a special structure, has a simple, compact, and inexpensive configuration, can reliably separate stacked sheets one by one, and can smoothly pull out recording sheets even when a feeding roller is stopped. .

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an automatic paper feeder according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 4 is a plan view of FIG. 3; FIG. 5 is a horizontal sectional view showing details of the feeding roller and freely rotating roller in FIG. 1; 6 is a sectional view taken along the line Vl-VT in FIG. 5, FIG. 7 is an end view taken from the line ■-■ in FIG. 5, and FIG. 8 is a cross-sectional view of the recording device in FIG. A schematic perspective view showing the state in which it is used in a horizontal position, FIG. 9 is a vertical sectional view showing details of the one-rotation spring clutch in FIG. 1, and FIG. 10 shows the control ring and control lever in FIG. 9. Front view shown, 1st
Figure 1 is a side view taken from line X1-Xl in Figure 1O.
2 is a side view of the control ring seen from line xn-xn in FIG. 10, FIG. 13 is a side view of the control ring seen from line xm-xm in FIG. 15 is a perspective view of the automatic paper feeder shown in FIG. 1 seen from the mounting surface on the recording device, and FIG. 16 is a rear view showing the mounting surface of the automatic paper feeder gt of the recording device in FIG. 17 is a cross-sectional view of the main part showing the locked state of the joint between the device and the automatic paper feeder, FIG. 17 is a cross-sectional view of the main part showing the unlocked state in FIG. 16, and FIG. 18 is the automatic paper feeder shown in FIG. FIG. 19 is a plan view showing the sheet stacking plate and sheet guide of the apparatus, FIG. 19 is a sectional view taken along the line XIX-XIX in FIG. 18, and FIG. Front view, Figure 21 is line XX in Figure 20
22 is a plan view of FIG. 20, FIG. 23 is a front view of the automatic paper feeder according to the third embodiment of the present invention, and FIG. 24 is a cross-sectional view taken along I-XXI. line XXIV-XX
25 is a sectional view along IV, FIG. 25 is a 23rd plan view, FIG. 26 is a front view of the automatic paper feeder according to the fourth embodiment of the present invention, and FIG. 27 is mxx■ in FIG. A sectional view taken along the line -XX■, and FIG. 28 is a plan view of FIG. 26. Below, symbols representing main components in the drawings are listed. 10-- Recording device, 14-- Conveyance roller, 15 B head, 28-- Sheet insertion slot, 34 Conveyance motor, 50--- Automatic paper feeding device, 51...-・Frame body, 52...-Paper feed shaft, 53 (53A, 53B) feeding rollers, 54--1 recording sheet, 55 sheet stacking plate, 56-----pressure spring, 57 ・-bank separation means,
58---Boss part (feed roller), 63---One circumferential groove, 65---Sheet guide, 71 Output gear,
72...-Human gear, 74--Franch gear, 75
--- One rotation spring clutch, 76 --- Boss part, 77 --- Clutch spring, 79 --- One control ring, 80 --- Control lever (control means) , 81-----control spring, 103
Hook member, 111--Guide groove (sheet stacking plate), 1
12-・-Engaging part (seat guide), 301-・-
Support shaft, 302 (302A, 302B)...
Free rotation roller, 304------notch (sheet guide), 305---circumferential groove (free rotation roller), 3
11--Guide member, 312--Stay, 31
3-・-Sekiguchi, 3111---Ichinosekiguchi. Figure 1S

Claims (7)

[Claims] (1) A feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate capable of stacking a plurality of recording sheets, and a sheet stacking plate that is biased toward the feeding roller to load the recording sheets into the desired position. a spring biasing means that can be pressed against the feeding roller;
an automatic sheet feeding device comprising a bank separating means comprising a running slope disposed in front of the feeding roller in the feeding direction, wherein the feeding roller is a half-moon-shaped roller having a cross section of an equal radius surface and an uneven radius surface; A freely rotating roller having a circumferential surface slightly apart from the equiradial surface with respect to the stacked recording sheets and capable of contacting the recording sheets is mounted on a support shaft installed parallel to the paper feed shaft. An automatic paper feeder characterized by being pivoted. (2) The driving force transmission mechanism for the feeding roller is provided with a one-turn spring clutch that performs on/off operation of the clutch when the feeding roller is at a reference position where it does not come into contact with the recording sheet. The automatic paper feeder according to claim 1. (3) The automatic paper feeding device according to claim 1 or 2, wherein the recording sheet sent out by the feeding roller is pulled out by a conveying roller in the recording device after the feeding roller stops. . (4) At least one set of the feeding roller and the free rotation roller is engaged with a sheet guide that guides the width of the recording sheet, and is adjustable in position in the sheet width direction together with the sheet guide. The automatic paper feeder according to claim 1. (5) A feeding roller that rotates together with a paper feeding shaft, a sheet stacking plate capable of stacking a plurality of recording sheets, and a sheet stacking plate that is biased toward the feeding roller to load the recording sheets into the desired position. a spring biasing means that can be pressed against the feeding roller;
an automatic sheet feeding device comprising a bank separating means comprising a running slope disposed in front of the feeding roller in the feeding direction, wherein the feeding roller is a half-moon-shaped roller having a cross section of an equal radius surface and an uneven radius surface; An automatic sheet feeding apparatus characterized in that a guide member is disposed near the feeding roller at a position slightly lower than the equiradial surface and capable of coming into contact with the recording sheets on the sheet stacking plate. (6) The driving force transmission mechanism for the feeding roller is provided with a one-turn spring clutch that performs an on/off operation of the clutch when the feeding roller is at a reference position where it does not contact the recording sheet. The automatic paper feeder according to claim 5. (7) The automatic paper feeding device according to claim 5 or 6, wherein the recording sheet sent out by the feeding roller is pulled out by a conveying roller in the recording device after the feeding roller stops. .