JP2008100787A - Feeding roller, feeding device, recording device, and liquid jetting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel feeding roller capable of smoothly and securely eliminating skewing to correct inclination of a recording member caused at the feeding start time and to provide a feeding device provided with the feeding roller, a recording device provided with the feeding device or the like. <P>SOLUTION: This feeding roller 1 feeds the recording member P in the direction of feeding by rotating while an outer peripheral face 35 of the roller is in contact with the recording member P. The outer peripheral face of the roller is provided with a contact part 36 having a small width being smaller than the whole width W of the outer peripheral face of the roller. The contact part 36 having small width is constituted to come into contact with the recording member when feeding the recording member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention provides a feeding roller that feeds the recording material in a feeding direction by rotating an outer peripheral surface of the roller in contact with the recording material, a feeding device including the feeding roller, and the feeding device. The present invention relates to a recording apparatus including a feeding device.
Furthermore, the present invention relates to a liquid ejecting apparatus such as an ink jet recording apparatus that performs recording on a recording material, that is, a liquid ejecting material by ejecting or ejecting a liquid such as ink from the head, and the liquid ejecting apparatus. The present invention relates to a feeding device provided for the feeding device and a feeding roller provided for the feeding device.

  Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a plotter, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording material. Instead, it includes a device for ejecting a liquid corresponding to the application from a liquid ejecting head corresponding to the recording head to a liquid ejecting material corresponding to a recording material and attaching the liquid to the liquid ejecting material. Use.

  In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

  Hereinafter, an ink jet printer which is an example of a liquid ejecting apparatus and a recording apparatus will be described as an example. Many ink jet printers are provided with an automatic feeding device that can automatically and continuously feed sheets placed in a stacked state on a feeding tray.

  The automatic feeding device includes a feeding tray on which a plurality of sheets can be loaded in a folded state, a hopper that pushes up the sheets stacked on the feeding tray toward the feeding roller, , A feeding roller for picking up the upper sheet on the feeding tray by the nipping and feeding operation with the hopper, the uppermost sheet used for executing the recording of a plurality of sheets fed multiple times, and other sheets Separating means for separating into subsequent sheets is provided. The paper separated into one sheet by the separating means is fed until the leading edge of the paper is pressed to the nip position of the conveying roller, and the feeding roller is temporarily stopped to perform skew removal for correcting the inclination of the paper. There are many things.

  Among them, the feeding roller is configured as shown in FIG. 9 (for example, Patent Document 1). That is, the roller outer peripheral surface (nip surface) 103 of the feeding roller 101 in contact with the paper P is a uniform flat surface having no step in the width direction. As shown in FIG. 9, the entire width W of the flat roller outer peripheral surface 103 is a nip width B, and the entire surface of the roller outer peripheral surface 103 is in contact with the paper P. In such a configuration, when the paper P is nipped with the large nip width B when the paper is fed, the slip between the paper P and the feeding roller 101 is eliminated, and the paper P can be fed in a stable posture. It was adopted based on the idea.

The skew removal is performed as follows. As shown in FIG. 9, abutting skew removal will be described by taking, for example, a case where a retard roller 105 is employed as the separating means. The sheet P is separated into the uppermost sheet by rotating the sheet feeding roller 101 while the sheet P is nipped by the retard roller 105 and the sheet feeding roller 101. After separation, the leading edge of the sheet P separated into one sheet reaches the nip position of a conveying roller (not shown) that is stopped, and the leading edge of the sheet is further pressed against the nip position, so that the surface of the sheet P is slightly The paper is fed until it bends, and after all the leading edges of the paper P have hit the nip position, the transport roller is rotated.
Note that the feeding roller 101 may be temporarily stopped before the conveying roller is rotated. That is, the rotation of the feeding roller may be stopped while the paper P is nipped by the feeding roller 101 and the retard roller 105.

  Subsequently, by rotating the conveying roller (when the feeding roller 101 is temporarily stopped, the feeding roller 101 is also rotated at the same time), the inclination with respect to the paper P is corrected by the nip position of the conveying roller. Thus, the leading edge of the sheet P is corrected in posture and sent toward the downstream. At that time, at the position where the sheet P is nipped by the feeding roller 101 and the retard roller 105 in the rear, the sheet P rotates around the nipped position based on the correction force, and the inclination of the entire sheet is corrected. Is done.

  However, conventionally, the roller outer peripheral surface 103 is a flat surface, the entire width W of which is the nip width B, and the entire surface of the roller outer peripheral surface 103 is in contact with the paper P. The rotational resistance when the paper P rotates is not small. For this reason, there is a possibility that the skew removal becomes unstable.

Regarding the inclination of the paper P that occurs during paper feeding, the posture of the paper P is kept stable by other mechanisms such as an edge guide provided for the feeding tray, and the paper inclination is kept small. Therefore, the necessity to increase the nip width B more than necessary is decreasing.
JP 2005-112696 A

  The present invention relates to a novel feeding roller that can smoothly and reliably perform skew correction for correcting the inclination of a recording material generated at the start of feeding, a feeding device including the feeding roller, and the feeding It is an object of the present invention to provide a recording device or the like provided with a feeding device.

  In order to solve the above-described problem, the feeding roller according to the first aspect of the present invention is configured to feed the recording material in the feeding direction by rotating the roller outer peripheral surface in contact with the recording material. A roller for feeding, wherein the outer peripheral surface of the roller includes a narrow contact portion having a width smaller than the entire width of the outer peripheral surface of the roller, and the narrow contact portion feeds the recording material when the recording material is fed. It is comprised so that a material may be contacted.

  The feeding roller according to the second aspect of the present invention is a feeding roller that feeds the recording material in the feeding direction by rotating the roller outer peripheral surface in contact with the recording material, The roller outer peripheral surface is provided with a narrow contact portion that is narrower than the entire width of the roller outer peripheral surface and contacts the recording material when feeding the recording material. To do.

  In the feeding roller according to the third aspect of the present invention, the small width portion whose width is narrower than the entire width of the outer peripheral surface of the roller that applies a feeding force to the recording material by rotating in contact with the recording material is It is configured to be a contact portion when feeding the recording material.

  According to the first aspect, the second aspect, and the third aspect of the present invention, the roller outer peripheral surface includes a narrow contact portion having a width dimension narrower than the entire width of the roller outer peripheral surface, and the small contact portion is Since the recording material is configured to come into contact with the recording material when the recording material is fed, the contact area where the roller outer peripheral surface comes into contact with the recording material is reduced, and the inclination of the recording material performed at the time of skew removal The correction can be performed smoothly. Further, by reducing the nip width, the center of rotation of the recording material at the time of correcting the tilt is determined, so that the skew removal performance of the recording material is also improved.

  The feeding roller according to a fourth aspect of the present invention is the feeding roller according to any one of the first to third aspects, wherein the narrow contact portion is a partial range in the circumferential direction of the roller outer peripheral surface or It is provided in the whole range.

  For example, when the feeding roller has a D shape as viewed from the side, the linear portion does not contact the recording material, and therefore, the narrow contact portion is preferably provided in a range excluding the linear portion. In addition, since it is sufficient that the portion that contacts the recording material at the time of skew removal is the narrow contact portion, the narrow contact portion is provided in a partial range in the circumferential direction of the roller outer peripheral surface including the portion. You may just have. The narrow contact portion may be provided in the entire range in the circumferential direction of the roller outer peripheral surface, and this is particularly good in the case of a feeding roller having a circular side view.

  The feeding roller according to a fifth aspect of the present invention is the feeding roller according to any one of the first to third aspects, wherein the small contact portion is formed in a bowl shape over the entire width of the outer peripheral surface of the roller. It is a top part of the protruding convex part.

  According to the fifth aspect of the present invention, the roller outer peripheral surface comes into contact with the recording material in one annular line passing through the apex of the bowl-shaped convex portion. Accordingly, the contact area with respect to the recording material becomes extremely small, and further, the vertex of the convex portion comes into the strongest contact and gradually comes into weak contact with the distance from it, so that the skew removal of the recording material is further smoothed. Thus, the skew removal performance can be further improved.

  The feeding roller according to a sixth aspect of the present invention is the feeding roller according to any one of the first to fourth aspects, wherein the narrow contact portion is formed in a part of the circumferential surface of the feeding roller in the width direction. It is characterized by being a convex part.

  According to the sixth aspect of the present invention, only the highest portion comes into contact with the recording material by providing the convex portion. Therefore, the contact area with the recording material is reduced, and the skew of the recording material is smoothed.

  According to a seventh aspect of the present invention, in the feeding roller according to any one of the first to sixth aspects, the feeding roller is provided integrally with a rotation shaft of the feeding roller. A roller bushing that forms a skeleton of the feeding roller; and an elastically deformable roller cover that covers the outer peripheral surface of the roller bushing and that contacts the recording material and applies a feeding force. An uneven base portion is provided on the outer peripheral surface of the roller bush portion to be attached. By attaching the roller cover portion to the outer peripheral surface of the roller bush portion, the roller cover portion is elastically deformed along the shape of the uneven base portion. The narrow contact portion is formed.

  According to the seventh aspect of the present invention, the shape of the roller bush portion that is easily formed integrally with the rotating shaft of the feeding roller without forming the roller cover portion that is difficult to be formed into a special shape. It becomes possible to form a desired narrow contact portion on the outer peripheral surface of the roller only by changing a part of the roller.

A feeding device according to an eighth aspect of the present invention is a feeding tray in which a plurality of recording materials can be placed in a stacked state, and the recording material on the feeding tray to a feeding roller. A hopper that moves between the contact state and the separation state, and a feeding roller that picks up the upper recording material in the feeding tray by rotating in a state where the recording material is in the contact state; Separating means for separating a plurality of recording materials fed by the pickup into an uppermost recording material and a succeeding recording material, and one recording material separated by the separating means. A feeding apparatus including a conveying roller that conveys to a recording execution unit, wherein the feeding roller is the feeding roller according to any one of the first to seventh aspects. It is characterized by this.
According to the eighth aspect of the present invention, it is possible to realize a feeding device that can smoothly and surely perform skew removal for correcting the inclination of the recording material generated at the start of feeding.

The feeding device according to a ninth aspect of the present invention is the feeding device according to the eighth aspect, wherein the separating means is in contact with the narrow contact portion of the feeding roller and cooperates with the feeding roller. It is a retard roller for separating the recording material.
According to the ninth aspect of the present invention, it is possible to reduce the contact area between the outer peripheral surface of the roller and the peripheral surface of the retard roller, which is related to smoothness of the skew removal of the recording material and the skew removal performance, and for feeding to the retard roller. By reducing the nip width of the roller, the rotation center of the recording material at the time of correcting the inclination becomes constant.

A recording apparatus according to a tenth aspect of the present invention is a recording apparatus comprising: a feeding device that sends a recording material to a recording execution unit; and a recording execution unit that performs recording on the recording material. The apparatus is the feeding apparatus described in the eighth aspect or the ninth aspect.
According to the tenth aspect of the present invention, it is possible to realize a recording apparatus capable of smoothly and reliably performing skew removal for correcting the inclination of the recording material generated at the start of feeding.

  A liquid ejecting apparatus according to an eleventh aspect of the present invention is a liquid ejecting apparatus including a feeding device that sends a liquid ejecting material to a liquid ejecting execution unit, and a liquid ejecting execution unit that ejects liquid onto the liquid ejecting material. The feeding device includes a feeding tray in which a plurality of liquid ejecting materials can be placed in a stacked state, and the liquid ejecting material on the feeding tray contacts the feeding roller. A hopper that moves between a state and a separated state, and a feeding roller that picks up the upper liquid ejecting material in the feeding tray by rotating while the liquid ejecting material is in the contact state Separating means for separating a plurality of liquid jetting materials fed by the pickup into an uppermost liquid jetting material and a succeeding liquid jetting material, and one piece of the liquid jetting material separated by the separating means. A transport roller for transporting the liquid jet material to the liquid jet execution unit; The feeding roller feeds the liquid ejecting material in the feeding direction by rotating the outer peripheral surface of the roller in contact with the liquid ejecting material, and the roller outer circumferential surface has a full width of the roller outer circumferential surface. A narrow contact portion having a narrower width dimension is provided, and the narrow contact portion contacts the liquid jet recording material when feeding the liquid jet material.

  Hereinafter, a feeding roller according to the present invention, an automatic feeding device including the feeding roller, and a recording apparatus which is an example of a liquid ejecting apparatus including the automatic feeding device will be described. First, an ink jet printer 100 is taken up as the best mode for carrying out a liquid ejecting apparatus of the present invention and a recording apparatus as an example thereof, and an outline of the entire configuration will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing an outline of the internal structure of the ink jet printer. The illustrated ink jet printer 100 includes a liquid ejecting apparatus main body and a printer main body 3 which is an example of a recording apparatus main body, and includes the automatic feeding device 2 of the present invention at an upper portion near the rear portion of the printer main body 3. The automatic feeding device 2 is a device that can automatically feed recording materials (hereinafter also referred to as “paper”) P, which is an example of a liquid jetting material, one by one continuously.

  The automatic feeding device 2 includes a feeding tray 5 on which a plurality of sheets P can be placed in a stacked state, and a sheet P stacked on the feeding tray 5 according to the present invention. A hopper 16 that pushes up toward the sheet 1, a feeding roller 1 that picks up the upper sheet P on the feeding tray 5 by cooperation with the hopper 16 (clamping pressure feeding action), and a plurality of sheets that are double-fed And a retard roller 17 that is an example of a separating unit that separates the uppermost sheet P used for execution of recording into another subsequent sheet P.

  The feeding tray 5 is provided with an edge guide 15 that contacts the left and right edges of the paper P and guides the paper P in the feeding direction of the paper P and in the sub-scanning direction as the transport direction. . The hopper 16 is provided so as to be swingable about a swing fulcrum O, and is configured to move up and down in conjunction with the rotation of the rotary shaft 18 of the feeding roller 1. The retard roller 17 is a circular member having a smaller diameter than the feeding roller 1 in a side view, and a cover member 31 formed of synthetic rubber or the like is attached to the peripheral surface of the retard roller 17. In addition, a damper mechanism (not shown) is connected to the rotating shaft 32 of the retard roller 17, and the retard roller 17 is configured to rotate with a load resistance from the damper mechanism.

  The retard roller 17 is held by a swing arm 33 that swings about a swing support point Q. The rocking fulcrum Q is provided at a position downstream of the position where the retard roller 17 is provided as an example. The swing arm 33 is always urged toward the feeding roller 1 by a coil spring 34 as an example of an urging means. The feeding roller 1 of the present invention will be specifically described in the section of the following embodiment.

  A conveyance roller 19 constituted by a pair of upper and lower nip rollers is provided downstream of the feeding roller 1 in the sheet conveyance direction. The sheet P conveyed by the conveying roller 19 is guided to the recording position 26 of the recording execution unit. Above the recording position 26, a recording head 13, which is an example of a liquid ejecting head that directly performs recording by ejecting ink, which is an example of liquid, onto the paper P is positioned. A platen 28 that supports the lower surface of the paper P is provided below the recording position 26. The platen 28 plays a role of defining a gap PG between the recording head 13 and the recording head 13 that is important for recording quality.

  The recording head 13 is mounted on the lower surface of the carriage 10 that reciprocates in the main scanning direction orthogonal to the sub-scanning direction. The carriage 10 is guided by a carriage guide shaft 12 spanned in the main scanning direction, and reciprocates by receiving a driving force from an endless belt 11 similarly stretched in the main scanning direction. Further, a discharge roller 20 constituted by a pair of nip rollers is provided downstream of the recording position 26 in the paper conveyance direction, as with the conveyance roller 19. Then, the paper P discharged by the discharge roller 20 is discharged and stacked on a mounting surface of a discharge stacker that is an example of a liquid injection material receiving portion (not shown).

[Example]
Next, the ink jet printer 100 configured as described above and the feeding roller 1 according to the embodiment of the present invention provided for the automatic feeding device 2 will be specifically described with reference to the drawings.

  FIG. 2 is an enlarged side sectional view showing the periphery of the feeding roller, and FIG. 3 is a perspective view showing the feeding roller. FIG. 4 is a perspective view showing a roller bush portion of the feeding roller, and FIG. 5 is a front view of a main part of the feeding device.

  In the feeding roller 1 according to the present embodiment, a small contact portion 36 for reducing the nip width B is provided on the roller outer peripheral surface 35 that contacts the paper P. In the present embodiment, the narrow contact portion 36 is constituted by a convex portion 37 in which the entire roller outer peripheral surface 35 is projected in a bowl shape over the entire width W. The feeding roller 1 is provided integrally with the rotating shaft 18 of the feeding roller 1, and a roller bush portion 38 that forms a skeleton of the feeding roller 1, and an outer peripheral surface of the roller bush portion 38. The roller cover portion 39 is provided so as to be covered and elastically deformable to apply a feeding force in direct contact with the paper P (execute a feeding operation).

  As shown in FIG. 4, the roller bush portion 38 is provided so as to be sandwiched between two flange portions 40 and 41 located on the left and right sides in the width direction, and the roller bush portion 39 to which the roller cover portion 39 is attached. On the peripheral surface of 38, an uneven base portion 42 is provided as a base when the narrow contact portion 36 is formed. In this embodiment, the concave and convex base portion 42 is formed by raising the central portion of the outer peripheral surface of the roller bush portion 38 in a bowl shape.

  The roller cover portion 39 is an endless belt-shaped member formed of a material that can be elastically deformed flexibly, such as synthetic rubber. The roller cover portion 39 is elastically deformed along the shape of the concave and convex base portion 42 to form an outer shape having the narrow contact portion 36. In addition, on the outer peripheral surface of the roller bush portion 38, flat portions 43 and 44, which are the outer peripheral surfaces of the roller bush portion 38, are formed on the left and right sides of the portion where the uneven base portion 42 is formed. However, since the width dimensions of the flat portions 43 and 44 are set to be substantially the same as the thickness t of the roller cover portion 39, the convexity of the feeding roller 1 to which the roller cover portion 39 is attached is set. As shown in FIG. 3, the shape portion 37 has a uniform convex curved surface over the entire width W of the feeding roller 1.

  Next, the operation will be described. The sheet P is separated into the uppermost sheet by rotating the sheet feeding roller 1 while the sheet P is nipped by the narrow contact portion 36 between the retard roller 17 and the sheet feeding roller 1. After separation, the leading edge of the sheet P separated into one sheet reaches the nip position of the transporting roller 19 that is stopped, and the sheet P is fed until the leading edge is pressed against the nip position and the surface of the sheet P is slightly bent. Then, after all the leading edges of the paper P have hit the nip position, the transport roller 19 is rotated.

  Subsequently, when the conveying roller 19 is rotated, a correction force that corrects the inclination with respect to the paper P is applied depending on the nip position of the conveying roller 19. Sent to. At that time, at a position where the sheet P is nipped by the small contact portion 36 of the feeding roller 1 and the retard roller 17 at the rear, the sheet P rotates around the nip position based on the correction force. The overall tilt is corrected.

  In this case, in the present invention, since the nip width B is set small by adopting the small contact portion 36, the sheet P can be easily rotated, and the skew removal operation is smoothly performed. Further, when the nip width B is set small as in the present embodiment, the skew removal performance of the paper P is improved by determining the rotation center of the paper P. For example, the skew removal performance of an L-size photographic paper is greatly improved from an average of 0.6 ° to an average of 0.3 °.

[Other embodiments]
The feeding roller 1, the automatic feeding device 2 provided with the feeding roller 1, the ink jet recording device 100 provided with the feeding device, and the like are based on the above-described configuration. However, it is of course possible to change or omit the partial configuration without departing from the gist of the present invention.

  For example, as shown in FIG. 6, the narrow contact portion 36 is a convex portion 45 or a concave portion 46 or a combination of the convex portion 45 and the concave portion 46 formed on a part of the roller outer peripheral surface 35 of the feeding roller 1 in the width direction. It is also possible to configure by. Incidentally, in FIG. 6 (a), an example in which a small hook-like convex portion 45 is provided at the center of the roller outer peripheral surface 35 is curved one by one at the left and right corner portions of the roller outer peripheral surface 35 in FIG. 6 (b). In the embodiment formed by providing the concave portions 46, 46, and in FIG. 6C, a rectangular convex portion 45 is provided at the center of the roller outer peripheral surface 35, and a square groove shape is formed on the left and right of the convex portion 45. Each of the embodiments provided with the two recesses 46, 46 is disclosed.

  Further, as shown in FIG. 7A, the narrow contact portion 36 is provided with a convex portion 47 directly on the peripheral surface of the roller cover portion 39, or has a different thickness as shown in FIG. 7B. It can also be formed by changing the configuration of the roller cover 39 side, such as using three roller cover elements 48, 49, 48 in combination.

  Further, as shown in FIGS. 8A and 8B, the narrow contact portion 36 may be configured by providing a convex portion 53 in a partial range in the circumferential direction of the roller bush portion 38. 8A and 8B, for example, when the feeding roller 1 has a D shape as viewed from the side, the linear portion 51 does not contact the recording material P, and therefore the linear portion 51 is excluded. It is preferable to provide a convex portion 53 serving as a base of the narrow contact portion 36 in the range.

  In FIG. 8, the convex portion 53 (the base of the narrow contact portion 36) is provided not in the entire range in the circumferential direction of the curved portion 52 but in a partial range, but provided in the entire range of the curved portion 52. May be. FIG. 8 shows a partial range in the circumferential direction of the roller outer peripheral surface 35 including a portion that contacts the recording material P at the time of skew removal, that is, a curved portion 52 on the end side in the rotation direction of the feeding roller 1. The narrow contact portion 36 is provided in the range. FIG. 8 shows a state where the roller cover portion 39 is not attached.

  Further, when the feeding roller 1 is circular in a side view (not shown), the narrow contact portion 36 is preferably provided in the entire range of the roller outer peripheral surface 35 in the circumferential direction. As a result, the skew removal can be performed by contacting the recording material P at any position in the circumferential direction.

  In addition, the feeding roller 1 of the present invention is not limited to the automatic feeding device 2 as shown in the figure, but can be applied to feeding devices having various configurations, such as a feeding cassette device that handles a large number of sheets P, and the like. It is also applicable to.

FIG. 2 is a side sectional view showing an outline of the internal structure of the ink jet printer. The sectional side view which expands and shows the periphery of a roller for feeding. The perspective view which shows the roller for feeding. The perspective view which shows the roller bush part of the roller for feeding. The front view which shows the roller for feeding. The front view which shows other Example (a)-(c) which varied the structure of the small contact part. The front view which shows other Example (a) and (b) which varied the structure of the small contact part. The perspective view which shows other Example (a) (b) which varied the structure of the small contact part. The front view which shows the conventional roller for feeding.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Feeding roller, 2 Automatic feeding apparatus, 3 Printer main body (recording apparatus main body), 5 Feeding tray, 7 Return lever, 10 Carriage, 11 Endless belt, 12 Carriage guide shaft, 13 Recording head, 15 Edge guide , 16 hopper, 17 retard roller (separating means), 18 rotary shaft, 19 transport roller, 20 discharge roller, 26 recording position, 28 platen, 31 cover member, 32 rotary shaft, 33 swing arm, 34 coil spring, 35 Roller outer peripheral surface, 36 Small contact portion, 37 Convex portion, 38 Roller bush portion, 39 Roller cover portion, 40 Flange portion, 41 Flange portion, 42 Concavity and convexity base portion, 43 Flat portion, 44 Flat portion, 45 Convex portion , 46 Concavity, 47 Convex, 48 Roller cover element, 49 Roller cover element, 1 0 inkjet printer (recording apparatus), P paper (recording material), PG gap, O swing fulcrum, Q fulcrum, W full width, B nip width, t thickness

Claims (11)

A roller for feeding the recording material in a feeding direction by rotating the roller outer peripheral surface in contact with the recording material,
The roller outer peripheral surface is provided with a narrow contact portion having a width dimension narrower than the entire width of the roller outer peripheral surface,
The feeding roller, wherein the narrow contact portion contacts the recording material when feeding the recording material. A roller for feeding the recording material in a feeding direction by rotating the roller outer peripheral surface in contact with the recording material,
The roller outer peripheral surface is provided with a narrow contact portion that is narrower than the entire width of the roller outer peripheral surface and contacts the recording material when feeding the recording material. Roller for feeding.   Feeding, which is a contact portion when feeding the recording material, a narrow portion having a width narrower than the entire width of the outer peripheral surface of the roller that applies a feeding force to the recording material by rotating in contact with the recording material Roller.   The feeding roller according to any one of claims 1 to 3, wherein the narrow contact portion is provided in a partial range or a total range in a circumferential direction of the roller outer peripheral surface. The feeding roller.   The feeding roller according to any one of claims 1 to 3, wherein the narrow contact portion is a top portion of a convex portion in which the entire outer peripheral surface of the roller is projected in a hook shape over the entire width. A feeding roller characterized by that.   5. The feeding roller according to claim 1, wherein the narrow contact portion is a convex portion formed in a part of the circumferential surface of the feeding roller in the width direction. Roller for feeding. In the feeding roller according to any one of claims 1 to 6,
The feeding roller is provided integrally with a rotating shaft of the feeding roller, and forms a skeleton of the feeding roller. The feeding roller covers the outer peripheral surface of the roller bushing and comes into contact with the recording material. An elastically deformable roller cover that applies a feeding force,
An uneven base portion is provided on the outer peripheral surface of the roller bush portion to which the roller cover portion is attached. By attaching the roller cover portion to the outer peripheral surface of the roller bush portion, the roller cover portion has the shape of the uneven base portion. A feeding roller characterized in that it is elastically deformed along with the narrow contact portion. A feeding tray capable of placing a plurality of recording materials in a stacked state; and
A hopper that moves the recording material on the feeding tray between a contact state with a feeding roller and a separated state;
A feeding roller that picks up the upper recording material in the feeding tray by rotating while the recording material is in the contact state;
Separating means for separating a plurality of recording materials fed by the pickup into a top recording material and a subsequent recording material;
A feeding device including a conveyance roller configured to convey a single recording material separated by the separation unit to a recording execution unit;
The feeding device according to claim 1, wherein the feeding roller is a feeding roller according to claim 1.   9. The feeding device according to claim 8, wherein the separating unit is a retard roller that contacts the narrow contact portion of the feeding roller and separates the recording material in cooperation with the feeding roller. A feeding device characterized by being.   A recording apparatus comprising: a feeding device that sends a recording material to a recording execution unit; and a recording execution unit that records on the recording material, wherein the feeding device is a feeding device according to claim 8 or 9. A recording apparatus characterized by the above. A liquid ejecting apparatus comprising: a feeding device that sends a liquid ejection material to a liquid ejection execution unit; and a liquid ejection execution unit that performs liquid ejection on the liquid ejection material,
The feeding device is
A feeding tray capable of placing a plurality of liquid jetting materials in a stacked state; and
A hopper that moves the liquid jetting material on the feeding tray between a contact state with a feeding roller and a separated state;
A feeding roller that picks up the upper liquid ejecting material in the feeding tray by rotating the liquid ejecting material in the contact state;
Separating means for separating a plurality of liquid jetting materials fed by the pickup into an uppermost liquid jetting material and a subsequent liquid jetting material;
A transport roller for transporting a single liquid jet material separated by the separating means to a liquid jet execution unit;
The feeding roller is
The roller outer peripheral surface rotates in contact with the liquid jetting material to feed the liquid jetting material in the feeding direction,
The roller outer peripheral surface is provided with a narrow contact portion having a width dimension narrower than the entire width of the roller outer peripheral surface,
The liquid ejecting apparatus, wherein the narrow contact portion contacts the liquid ejected recording material when feeding the liquid ejected material.

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