JP2008068977A - Paper feed roller, manufacturing method thereof, paper feed unit, and recording apparatus - Google Patents

Abstract

A method of manufacturing a paper feed roller that is easy to manufacture and can form a high friction region with high accuracy is provided.
A first step of forming a high friction region 50 by subjecting at least a part of a plate body 60 to a concavo-convex process, and a second step of rounding the plate body 60 formed with the high friction region 50 into a pipe. And a process.
[Selection] Figure 3

Description

  The present invention relates to a paper feed roller, a manufacturing method thereof, a paper feed unit, and a recording apparatus, and more particularly to a paper feed roller capable of realizing weight reduction, a manufacturing method thereof, a paper feed unit, and a recording apparatus.

  There is a printer as one of the recording devices. In this printer, after a recording medium such as paper is fed to a recording unit by a paper feeding roller and a driven roller, a paper discharge roller (driving roller) and its driven roller (gagged roller) are used. The thing of the composition to discharge is adopted.

  This type of paper feed roller conveys the paper to the recording position in the sub-scanning direction orthogonal to the carriage moving direction by sandwiching the paper with the driven roller and rotationally driving it. Power is required.

  Therefore, in order to maintain a high frictional force on the paper feed roller, Patent Document 1 discloses a technique for forming a large number of protrusions on the peripheral surface of a metal round bar by punching.

Further, Patent Document 2 discloses a technique for forming a large number of protrusions by hitting the surface by press working and raising the surface.
Japanese Patent No. 3271848 JP-A-10-119374

  However, the following problems exist in the conventional technology as described above.

  Since it is necessary to form protrusions along the circumferential direction on the shaft-like (cylindrical) surface, in addition to poor workability, there is a problem that the cost is increased because a solid material is used.

  Patent Document 2 also describes the use of a hollow shaft (pipe), but there is a problem that deformation tends to occur especially in the case of thin-walled pipes by hitting the surface by press working. There is a risk that the accuracy may decrease.

  On the other hand, when the paper is transported, paper dust is generated due to friction between the paper and the projection of the paper feed roller, and when this paper dust accumulates, the frictional force between the paper and the projection of the paper feed roller decreases, and the transport force decreases. Problem arises.

  The present invention has been made in consideration of the above points, and provides a paper feed roller that can be easily manufactured and can form a high friction area with high accuracy, a manufacturing method thereof, a paper feed unit, and a recording apparatus. Objective.

  Another object of the present invention is to provide a paper feed roller, a method for manufacturing the same, a paper feed unit, and a recording apparatus that can suppress a decrease in conveying force.

  In order to achieve the above object, the present invention employs the following configuration.

  The method for manufacturing a paper feed roller of the present invention includes a first step of forming a high friction region by subjecting at least a part of a plate body to a concavo-convex process, and rounding the plate body having the high friction region formed thereon. And a second step of forming a pipe.

  Therefore, in the present invention, since a smooth plate-like body is subjected to uneven processing such as press processing, a high friction region such as a protrusion can be easily manufactured as compared with the case of processing the outer peripheral surface of a cylinder. Can do. Further, in the present invention, since a pipe is formed after a high friction region is formed on the plate-like body, damage to the pipe is reduced and a high precision paper feed roller as compared with the case where the unevenness treatment is performed on the pipe. Can be manufactured.

  Furthermore, in the present invention, since the paper feed roller is hollow and the weight of the material is reduced, the material cost can be reduced, and the paper feed roller is reduced in weight, so the load of the motor that drives the paper feed roller is reduced. Can be reduced, and inertia during operation / stop can be reduced. Therefore, in the present invention, the paper feed roller can be driven by a smaller motor, which can contribute to the reduction in size and weight and the cost of the equipment including the paper feed roller.

  Further, in the second step of the present invention, a procedure of rounding a region from which the high friction region is removed as a contact portion can be suitably employed.

  Thereby, in this invention, when performing the process which rounds a plate-shaped object, it can prevent that a conveyance force falls by damaging a high friction area | region (convex part) and reducing a frictional force.

  In the second step of the present invention, a procedure for spirally winding the plate-like body can also be suitably employed.

  As a result, in the present invention, the plate-like body is formed into, for example, a belt shape, and by repeating the spiral winding step and the cutting step, it becomes possible to manufacture a large number of paper feed rollers continuously, and productivity is improved. It can contribute to improvement.

  In the first step of the present invention, a procedure for forming a through hole in the plate-like body can be preferably employed.

  As a result, in the present invention, dust and paper powder can be easily discharged from the through hole, and the dust and paper powder reduce the frictional force between the paper and the paper feed roller, thereby reducing the conveying force. Can be suppressed.

  In the first step of the present invention, a procedure for forming a bowl-shaped cut can also be suitably employed.

  As a result, in the present invention, it becomes possible to simultaneously form the protrusion and the through-hole constituting the high friction region, and dust and paper dust are discharged, and the frictional force between the paper and the paper feed roller is reduced. It is possible to efficiently manufacture a paper feed roller that can suppress the above.

  In the paper feed roller of the present invention, a protruding high friction region is provided on a part of the surface, at least a portion of the high friction region is formed in a pipe shape, and a through hole is formed in the pipe portion. It is characterized by being.

  Therefore, in the paper feed roller of the present invention, the inside is hollow and the weight of the material is reduced, so that the material cost can be reduced and the paper feed roller is reduced in weight. Therefore, the motor for driving the paper feed roller Load, and inertia during operation / stop can be reduced. Therefore, in the present invention, the paper feed roller can be driven by a smaller motor, which can contribute to the reduction in size and weight and the cost of the equipment including the paper feed roller.

  Furthermore, in the paper feed roller of the present invention, dust and paper dust can be easily discharged from the through-hole, and the dust and paper powder reduce the frictional force between the paper and the paper feed roller, thereby reducing the transport force. It can suppress that it falls.

  Moreover, as the through hole in the present invention, a configuration formed in the high friction region can be suitably employed.

  Therefore, according to the present invention, it is possible to efficiently discharge paper dust that is likely to be generated in a high friction region.

  Moreover, as the said through-hole in this invention, the structure currently formed corresponding to a protruding part can be employ | adopted suitably.

  Therefore, according to the present invention, it is possible to efficiently discharge paper dust that is likely to be generated in the protruding portion that becomes the high friction region.

  On the other hand, a paper feed unit according to the present invention includes the paper feed roller described above, a driven roller that is driven in contact with the paper feed roller, and a drive device that rotationally drives the paper feed roller. To do.

  Therefore, in the present invention, since the paper feed roller is provided, it is possible to obtain a paper feed unit that contributes to highly accurate paper transport, cost reduction, reduction in size and weight of the device, and cost reduction.

  Moreover, in this invention, the structure by which the low abrasion process is performed to the surface of the said driven roller can be employ | adopted suitably.

  Thereby, in this invention, it can suppress that a driven roller is damaged by contact with a paper feed roller, especially a contact with a high friction area | region.

  Moreover, in this invention, the structure by which the said driven roller is arrange | positioned corresponding to the said high wear area | region can be employ | adopted suitably.

  As a result, in the present invention, the force for pinching the paper between the paper feed roller and the driven roller is increased, and the paper feed can be stabilized.

  According to another aspect of the present invention, there is provided a recording apparatus including the paper feeding unit described above, a recording unit that performs a recording process on the conveyed paper, and a control unit that controls the recording process of the recording unit. Is.

  Therefore, since the recording apparatus of the present invention includes the above-described paper feeding unit, it is possible to obtain a recording apparatus that contributes to high-precision paper conveyance, cost reduction, downsizing, weight reduction, and cost reduction of equipment. Can be recorded with high accuracy.

  In the present invention, a configuration in which the paper feeding unit is disposed on the paper feeding side with respect to the recording unit can also be suitably employed.

  Thus, in the present invention, the paper can be conveyed to the recording unit with high accuracy, and high-precision recording can be performed on the paper.

  Moreover, in this invention, the structure which has an air drive device which attracts | sucks or injects air through the said through-hole can be employ | adopted suitably.

  Accordingly, in the present invention, it is possible to easily remove dust and paper dust by sucking or ejecting air through the through hole. It is possible to suppress a decrease in the frictional force and a decrease in the conveying force.

  Further, as the control unit in the present invention, a configuration for controlling the driving timing of the air driving device can be suitably employed.

  Thus, in the present invention, it is possible to synchronize the recording process in the recording unit and the suction or ejection of air through the through hole. For example, during the recording process, the ejection of air is stopped and the air is ejected. This can prevent the recording process from being adversely affected.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a paper feed roller, a manufacturing method thereof, a paper feed unit, and a recording apparatus according to the present invention will be described below with reference to FIGS.

  In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

  FIG. 1 is a side sectional view of an ink jet printer including a paper feeding unit of a recording apparatus according to an embodiment of the present invention. FIG. 2 is a plan view (A) of a paper feeding unit portion of the recording apparatus and a side surface of a drive system. It is a figure (B).

  In FIG. 1, reference numeral 1 denotes an ink jet printer which is an example of a recording apparatus to which a paper feed unit according to the present invention is applied. The ink jet printer 1 includes a printer main body 3, a paper feeding unit 5 provided at the upper rear portion of the printer main body 3, and a paper discharge unit 7 formed in front of the printer main body 3.

  A paper feed tray 11 is provided in the paper feed unit 5, and a plurality of sheets P can be stacked on the paper feed tray 11. A paper feed roller 13 is provided immediately downstream of the paper feed tray 11. The paper feed roller 13 presses the paper P located at the uppermost part of the paper feed tray 11 between the opposing separation pads and feeds it forward.

  The fed paper P reaches a paper feed roller mechanism 19 composed of a paper feed drive roller (paper feed roller) 15 disposed on the lower side and a paper feed driven roller (driven roller) 17 disposed on the upper side. Therefore, a print head 21 which is a recording head (recording unit) located on the downstream side of the paper feed roller mechanism 19 while receiving a precise paper feed operation in the printing process by rotational driving of a paper feed drive roller 15 by a drive system described later. The paper is fed to.

  The print head 21 is supported by a carriage 23, and the carriage 23 can reciprocate in a direction orthogonal to the paper feeding direction. A platen 24 is provided at a position facing the print head 21, and the platen 24 is constituted by a plurality of diamond ribs 25 arranged at intervals along the moving direction of the carriage 23. The diamond rib 25 acts to support the paper P from below when printing on the paper P by the print head 21, and specifically, the top surface of the diamond rib 25 takes on the action.

  The printing process (recording process) by the print head 21 is controlled by the control unit CONT shown in FIG.

  The distance between the print head 21 and the diamond rib 25 can be adjusted as appropriate according to the thickness of the paper P, so that the paper P smoothly passes over the top surface of the diamond rib 25 and is high quality. You can print. The paper P printed by the print head 21 is sequentially discharged by a paper discharge roller 27 provided in the paper discharge unit 7.

  The paper discharge roller 27 is composed of a paper discharge drive roller 29 disposed on the lower side and a paper discharge roller 31 disposed on the upper side, and the paper P is drawn out and discharged by the rotational drive of the paper discharge drive roller 29. It is a device.

  Here, the relationship between the drive systems of the drive rollers 15 and 29 and the drive speeds of the drive rollers 15 and 29 in the paper feed roller mechanism 19 and the paper discharge roller 27 will be described. As shown in FIG. 2B, the printer main body 3 is provided with a paper feed motor (drive device) 32 driven under the control of the control unit CONT, and a pinion 33 provided on the drive shaft has a paper feed motor 32. The feed drive gear 35 is engaged. A rotation shaft 37 of the paper feed drive gear 35 is connected to the paper feed drive roller 15.

  An intermediate gear 41 meshes with an inner gear 39 provided coaxially with the paper feed drive gear 35, and a paper discharge drive gear 43 meshes with the intermediate gear 41. The rotation shaft of the paper discharge drive gear 43 is a shaft body 45 of the paper discharge drive roller 29. In this way, the drive rollers 15 and 29 in the paper feed roller mechanism 19 and the paper discharge roller 27 are driven by receiving a driving force from the paper feed motor 32 which is the same drive source.

  By adjusting the gear ratio, the rotation speed of the paper discharge drive roller 29 is set to be faster than the rotation speed of the paper feed drive roller 15, so the paper discharge speed of the paper discharge roller 27 is The speed is higher by the speed increase rate s than the paper feed speed of the roller mechanism 19. Further, since the paper pressing force by the paper feed roller mechanism 19 is set to be larger than the pressing force by the paper discharge roller 27, both the paper feed roller mechanism 19 and the paper discharge roller 27 are in a state of holding the paper. The paper transport speed at that time is defined by the paper feed speed of the paper feed roller mechanism 19 regardless of the paper discharge speed of the paper discharge roller 27.

  Hereinafter, the paper feed roller mechanism 19 which is a characteristic configuration of the present invention will be described.

  FIG. 3 is an external perspective view showing details of a main part of the paper feed roller mechanism 19 including the paper feed drive roller 15 and the paper feed driven roller 17.

  The paper feed drive roller 15 is formed in a pipe shape by rolling a metal plate 60 such as stainless steel (described later), and the outer peripheral surface thereof has a high friction with a predetermined interval in the axial direction. Region 50 is provided. In each high-friction region 50, a plurality of protrusions 51 formed by subjecting the plate-like body 60 to a concavo-convex process are arranged at substantially constant intervals in the axial direction and the circumferential direction.

  As this uneven | corrugated process, the method of forming the notch | incision of a bowl shape (triangle) in the plate-shaped body 60 by press work here is taken. As a result, as shown in FIG. 4A, with one side of the triangle as a base end, as shown in FIG. 4B, the protrusion 51 protruding from the apex of the triangle bent outward (outside) is formed. Is formed. The plate-like body 60 into which the protrusions 51 are cut is formed with triangular through-holes 61 in a plan view so as to correspond to the protrusions (protruding portions) 51, respectively.

  In addition, between the high friction area | region 50 and the both ends of the paper feed drive roller 15 are made into the unprocessed part of an uneven | corrugated process, and paper feed drive is carried out in the edge part of the paper feed drive roller 15 which is this unprocessed part. The rotary shaft 37 of the gear 35 is connected.

  As shown in FIGS. 2 and 3, the inkjet printer 1 of the present embodiment includes an air suction device (air drive device) that sucks negatively the air inside the paper feed drive roller 15 formed in a pipe shape. 55 is provided. The driving of the air suction device 55 is also controlled by the control unit CONT.

  As shown in FIG. 3, the paper feed driven roller 17 is divided into a number and a length corresponding to the high friction region 50 of the paper feed drive roller 15. Each paper feed driven roller 17 is arranged to be urged so as to come into contact with the high friction region 50 (protrusion 51) with a predetermined urging force (clamping force with respect to the paper P). Therefore, the surface of the paper feed driven roller 17 is subjected to a low wear process such as a fluororesin coating in order to suppress damage due to sliding contact with the protrusion 51.

  Next, a method for manufacturing the paper feed drive roller 15 will be described with reference to FIGS.

  First, as shown in FIG. 5, the projections 51 are formed in groups by subjecting the plate-like plate-like body 60 to unevenness processing (cutting processing) at predetermined intervals by pressing, thereby forming a paper feed driving roller. A high friction region 50 is provided along the direction of 15 rotation axes (first step).

  Next, as shown in FIG. 6, a support portion 71 that supports a region from which the high friction region 50 is removed, a jig 70 having a recess 72 that forms a gap with the high friction region 50, and the support portion 71. The plate-like plate-like body 60 is rounded into a pipe shape using a mold 75 that is arranged opposite to the plate 75 and rounds the plate-like body 60 into a pipe shape (second step).

  Specifically, as shown by arrows in FIG. 5, the plate body 60 is rounded around the rotation axis into a pipe shape using the mold 75 with the vicinity of both ends of the region from which the high friction region 50 is removed as a contact portion. .

  Thereby, as shown in FIG. 7, the plate-like body 60 is curved in an arc shape in the width direction, and as shown in FIG. 3, the paper feed driving roller 15 is formed into a pipe (cylindrical).

  Then, at the end, it is incorporated into the ink jet printer 1 by being connected to the rotation shaft 37 of the paper feed drive gear 35.

  Next, the operation of the inkjet printer 1 of the above embodiment will be described.

  When the paper P fed by the paper feed roller 13 reaches the vicinity of the upstream side of the paper feed roller mechanism 19, the upper surface thereof is guided and guided between the paper feed drive roller 15 and the paper feed driven roller 17. The two rollers are driven at a constant speed toward the lower side of the print head 21 located on the downstream side. The paper feed driving roller 15 is formed with a high friction area 50 having a protrusion 51, and the paper feed driven roller 17 is disposed in an urging state so as to face the high friction area 50. It is transported stably with a strong clamping force.

  At this time, the control unit CONT operates the air suction device 55 in synchronization with the paper feed motor 32 to suck the air inside the paper feed drive roller 15.

  As a result, the paper dust of the paper P generated by being sandwiched between the paper feed driving roller 15 and the paper feed driven roller 17, the dust that floats in the inkjet printer 1 due to the rotation of various gears, etc. As shown in FIG. 8, the air is sucked into the paper feed driving roller 15 through the through hole 61 and discharged to the outside together with air.

  In this case, it is preferable that the air suction direction is a direction from the distal end side of the protrusion 51 toward the proximal end side so that paper dust or the like can be sucked smoothly.

  Then, when the printing start end of the paper P reaches a predetermined printing position directly below the print head 21, printing is started. Here, the control unit CONT can also stop the air suction via the air suction device 55 when the air suction by the air suction device 55 adversely affects recording processing such as ink ejection by the print head 21. is there.

  Thereafter, when the leading edge of the paper P reaches the paper discharge roller 27, the paper discharge operation is started. On the other hand, since the transport speed of the paper discharge roller 27 is set higher than the transport speed of the paper feed roller mechanism 19, the paper P It is transported with back tension applied.

  As described above, in this embodiment, the plate-like body 60 is subjected to the unevenness process to form the high friction region 50 having the protrusions 51, and then rounded to form a pipe. Compared with the case where it processes, it becomes possible to manufacture a high friction area | region easily and can improve manufacturing efficiency. Further, in the present embodiment, since the unevenness processing of the flat plate-like body 60 is performed, damage to the pipe can be reduced as compared with the case where the unevenness processing is performed on the pipe, and high-precision paper feed driving. The roller 15 can be manufactured.

  Furthermore, in this embodiment, since the paper feed drive roller 15 is hollow, the cost related to material costs can be reduced, and the paper feed drive roller 15 is reduced in weight. The load on the motor 32 to be driven can be reduced, and the inertia at the time of operation / stop can be reduced. Therefore, in the present embodiment, the paper feed driving roller 15 can be driven by a smaller motor, and the printer main body 3, the paper feeding unit 5, and the ink jet printer 1 having these can be reduced in size, weight, and cost. Can contribute.

  In the present embodiment, since the paper feed driving roller 15 has the through-hole 61, paper dust or the like generated during the conveyance of the paper P can be guided into the tube of the paper feed driving roller 15 and the projection 51 etc. Since the amount of adhesion can be reduced, the frictional force between the paper P and the paper feed driving roller 15 is reduced due to the presence of paper dust and the like, and it is possible to suppress a reduction in the transporting force. Can be realized.

  In addition, in this embodiment, since the air suction device 55 that sucks air inside the paper feed drive roller 15 is provided, dust, paper dust, etc. floating outside the paper feed drive roller 15 are also passed through the through hole 61. Therefore, it is possible to more effectively suppress a reduction in the frictional force related to the paper feed drive roller 15 and a reduction in the conveyance force.

  Further, in the present embodiment, when the plate-like body 60 is rolled, the region from which the high friction region 50 is removed is used as the contact portion. Therefore, the protrusion 51 forming the high friction region 50 is damaged and the conveying force is reduced. Can be prevented.

  In the present embodiment, since the through-hole 61 is formed in the high friction region 50, particularly for each protrusion 51 that actually contacts the paper P, and immediately below the protrusion 51, the paper dust and the like are sucked more efficiently. Can be discharged. In addition, in this embodiment, since the plate-like body 60 is formed with a bowl-shaped cut, the protrusion 51 and the through hole 61 can be formed at the same time, and the paper feed roller can be manufactured efficiently. it can.

  In the present embodiment, the paper feed driven roller 17 is disposed corresponding to the high friction region 50 of the paper feed drive roller 15, and therefore the paper P between the paper feed driven roller 17 and the paper feed drive roller 15. As a result, the force for pinching the sheet increases, and the paper feeding can be stabilized. In this embodiment, since the surface of the paper feed driven roller 17 is subjected to a low wear process, the paper feed driven roller 17 is damaged by contact with the high friction area 50 (projection 51) of the paper feed drive roller 15. Can be suppressed, and a stable conveying force for the paper P can be maintained over a long period of time.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above-described embodiment, the configuration is such that dust or paper dust is removed through the through hole 61 by sucking the air inside the paper feed drive roller 15 formed in a pipe shape. Instead of this, by supplying air, the air may be ejected from the through hole 61 to remove dust, paper dust, and the like.

  Moreover, in the said embodiment, it was set as the structure which forms the paper feed drive roller 15 by what rounded the plate-shaped body, However, In addition to this, it is the structure which winds and attaches a plate-shaped body to another pipe body. Also good.

  Furthermore, in the said embodiment, although it was set as the procedure which rounds the plate-shaped body 60 around a rotating shaft line and forms the paper feed drive roller 15, as shown in FIG. 9, for example, as shown in FIG. The procedure for forming the paper feed driving roller 15 by spirally winding may be adopted.

  As a result, the plate-like body is prepared in a state of being wound around a roller or the like, and a large number of paper feed rollers are continuously manufactured by repeating the step of winding the plate-like body spirally and the step of cutting. Can contribute to the improvement of productivity. In this case, it is preferable that the protrusions 51 are not formed at both ends so that the protrusions 51 of the high friction region 50 are not damaged when the plate-like body is wound spirally. Further, when the plate-like body is wound in a spiral shape, as shown in FIG. 9, it is preferable to form a through hole with a gap for each turn.

  In the above embodiment, the paper feed roller according to the present invention is applied to the paper feed drive roller 15. However, the present invention is not limited to this, and the paper feed roller is applied to the paper discharge drive roller 29 and the paper discharge jagged roller 31. It is good also as a structure. In particular, since the paper discharge serpentine roller needs to be supported with a light load, the present invention capable of realizing weight reduction can be suitably applied.

  In the above embodiment, the plate-like body 60 is cut to form the protrusions 51 and the through holes 61 at the same time. However, the present invention is not limited to this. For example, the protrusions and the through holes are formed. It is good also as a structure formed separately.

It is a sectional side view of an inkjet printer. FIG. 4 is a plan view (A) of a paper feed unit portion and a side view (B) of a drive system. It is an external appearance perspective view which shows the principal part detail of a paper feed roller mechanism. (A) which shows the detail of protrusion is a top view, (b) is sectional drawing. It is a figure which shows the manufacture procedure of a paper feed drive roller. It is sectional drawing of the jig | tool used at the time of manufacture of a paper feed drive roller. It is a figure which shows the manufacture procedure of a paper feed drive roller. It is a figure for demonstrating the mode of air suction. It is a figure which shows another form of a paper feed drive roller.

Explanation of symbols

  CONT: control unit, 1: inkjet printer (recording apparatus), 15: paper feed driving roller (paper feed roller), 17: paper feed driven roller (driven roller), 21 ... print head (recording head, recording unit), 32 ... Paper feed motor (drive device), 50 ... High friction region, 51 ... Protrusion, 55 ... Air suction device (air drive device), 60 ... Plate-like body, 61 ... Through hole

Claims (15)

A first step of forming a high friction region by subjecting at least a part of the plate-like body to a concavo-convex treatment;
A second step of rolling the plate-like body formed with the high friction region into a pipe;
A method of manufacturing a paper feed roller, comprising: In the manufacturing method of the paper feed roller of Claim 1,
In the second step, the paper feed roller manufacturing method is characterized in that a region excluding the high friction region is rounded as a contact portion. In the manufacturing method of the paper feed roller of Claim 1 or 2,
In the second step, the sheet-like roller manufacturing method, wherein the plate-like body is spirally wound. In the manufacturing method of the paper feed roller in any one of Claim 1 to 3,
In the first step, a through-hole is formed in the plate-like body. In the manufacturing method of the paper feed roller of Claim 4,
In the first step, the paper feed roller manufacturing method is characterized in that a bowl-shaped cut is formed. Protruding high friction area is provided on a part of the surface,
At least a portion of the high friction region is formed in a pipe shape,
A paper feed roller, wherein a through hole is formed in a pipe-like portion. The paper feed roller according to claim 6,
The paper feed roller, wherein the through hole is formed in the high friction region. The paper feed roller according to claim 7,
The paper feed roller, wherein the through hole is formed to correspond to the protruding portion. A paper feed roller according to any one of claims 6 to 8,
A driven roller that is driven in contact with the paper feed roller;
A paper feed unit comprising: a drive device that rotationally drives the paper feed roller. The paper feeding unit according to claim 9, wherein
A paper feed unit, wherein the surface of the driven roller is subjected to a low wear treatment. The paper feeding unit according to claim 9 or 10,
The paper feeding unit, wherein the driven roller is arranged corresponding to the high wear region. A paper feeding unit according to any one of claims 9 to 11,
A recording unit for performing a recording process on the conveyed paper;
And a control unit that controls a recording process of the recording unit. The recording apparatus according to claim 12, wherein
The recording apparatus, wherein the paper feeding unit is disposed on a paper feeding side with respect to the recording unit. The recording apparatus according to claim 12 or 13,
A recording apparatus comprising an air driving device that sucks or jets air through the through hole. The recording apparatus according to claim 14, wherein
The recording apparatus, wherein the control unit controls a driving timing of the air driving device.

Images