JP2014047036A - Sheet feeding device and recording apparatus including sheet feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet feeding device capable of suppressing, even if a recording medium having high rigidity is fed, generation of noise, and a recording apparatus including the sheet feeding device.SOLUTION: A sheet feeding device includes a recording medium stacking unit (a sheet feeding casette unit 12) storing a plurality of recording media 100, a sheet feeding roller 132 that contacts the uppermost one of the stacked recording media 100, and a sheet feeding mechanism unit (a swing arm sheet feeding mechanism 14). The sheet feeding mechanism unit includes a first drive train connected to the sheet feeding roller 132 via a drive gear (a delay gear 143), which transmits a first rotational torque therebetween, and a second drive train connected to a drive unit. The sheet feeding device further includes a drive coupling unit (a clutch mechanism unit 145) arranged between the first drive train and the second drive train for transmitting a second rotational torque from the second drive train to the first drive train.

Description

  The present invention relates to a recording medium feeding apparatus and a recording apparatus that includes the feeding apparatus and forms an image on a recording medium.

  Recording provided with a paper feeding device (feeding unit) having a swing arm paper feeding mechanism unit equipped with a paper feeding roller (front feeding roller) for feeding recording media loaded in a paper feeding cassette one by one An apparatus is disclosed in US Pat. In this sheet feeding device, the sheet feeding roller contacting the uppermost recording medium loaded in the sheet feeding cassette is rotated, so that the recording medium is conveyed toward the inclined surface separation portion (front feeding separation guide portion). The recording medium is separated and fed one by one in the slope separation unit. The fed recording medium is conveyed to a recording unit that forms an image on the recording medium by a conveying roller provided downstream in the recording medium conveying direction of the slope separation unit.

JP 2010-76421 A

  In the invention disclosed in Patent Document 1, when a recording medium is fed, when the recording medium passes over the inclined surface separation portion and is sandwiched by the transportation roller, the rotation speed of the transportation roller that is sandwiched by the recording medium. It is conveyed according to. However, since the conveyance roller generally has a higher rotation speed than the paper feed roller, when the recording medium is conveyed at the rotation speed of the conveyance roller, tension is applied to the recording medium by the conveyance roller, and the slope separation unit is caused by the rigidity of the recording medium. May be lifted from. At this time, the swing arm paper feed mechanism having a paper feed roller in contact with the surface of the recording medium is lifted from the position in contact with the recording medium and then moved to a position in contact with the surface of the recording medium lifted. However, when the paper feed roller comes into contact with the surface of the recording medium again, the paper feeding roller will idle due to the difference between the rotation speed of the paper feeding roller and the conveyance speed of the recording medium, and the swing arm paper feeding mechanism will bounce on the recording medium. End up. When the swing arm paper feeding mechanism bounces on the recording medium, there is a problem that the conveyance of the recording medium becomes unstable and the recording medium vibrates and generates abnormal noise.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a paper feeding device and a paper feeding device that can solve the above-described problems and can stably convey even if a rigid recording medium is fed, and can suppress the generation of abnormal noise. It is to provide a recording apparatus provided.

  In order to achieve the above object, the present invention provides a recording medium stacking unit that accommodates a plurality of recording media, and a paper feed roller that is in contact with the uppermost recording medium of the plurality of recording media stacked on the recording medium stacking unit. And a paper feed mechanism section, the paper feed mechanism section being connected to a paper feed roller and a first drive train connected via a drive gear that transmits the first rotational torque to each other, The second drive train connected to the drive unit that generates the second rotational torque for rotating the roller, and the first drive train and the second drive train are arranged from the second drive train. And a drive connecting portion that transmits the second rotational torque only in one direction to the first drive train.

  According to the present invention, the drive connecting portion is provided between the first drive row including the paper feed roller and the second drive row connected to the drive portion that generates the second rotational torque. Since the drive connecting portion transmits the second rotational torque only in one direction, the first rotational torque generated by the paper feed roller is not transmitted to the second drive train. For this reason, even if a recording medium having high rigidity is lifted from the inclined surface separation portion, the paper feeding mechanism portion does not bounce on the lifted recording medium. Thereby, the recording medium can be stably conveyed, and the recording medium does not vibrate, so that the generation of abnormal noise due to the vibration of the recording medium can be suppressed.

1 is a perspective view showing a recording apparatus according to an embodiment of the present invention. It is a perspective view which shows the engine part of the recording device of this embodiment. It is a perspective view which shows the paper feed part of this embodiment. It is sectional drawing which shows the paper feed part of this embodiment. It is a perspective view which shows the paper feed cassette unit of this embodiment. It is sectional drawing which shows the edge part of the paper feed cassette unit of this embodiment. It is a perspective view which shows the side guide in the paper feed cassette unit of this embodiment. It is sectional drawing which shows the side guide in the paper feed cassette unit of this embodiment. It is a perspective view which shows the slope separation part of this embodiment. (A) is A-A 'sectional drawing of the slope separation part shown in FIG. 9, (b) is B-B' side view. It is a perspective view which shows the state which the separation piece which the slope separation part shown in FIG. 9 has retracted from the surface. It is a perspective view which shows the swing arm paper feeding mechanism part of this embodiment. FIG. 13 is a perspective view illustrating a mechanism for transmitting a driving force to a sheet feeding roller of the swing arm sheet feeding mechanism unit illustrated in FIG. 12. FIG. 13 is a perspective view showing a structure around the clutch mechanism of the swing arm sheet feeding mechanism shown in FIG. FIG. 15 is a perspective view illustrating a state in which the clutch mechanism unit illustrated in FIG. 14 is operated to transmit a driving force to the sheet feeding roller. (A) is a cross-sectional view and a plan view showing a state in which the recording medium is started to be fed by the swing arm feeding mechanism, and (b) is a state in which the recording medium is fed by the swing arm feeding mechanism and the conveying roller. They are sectional drawing and a top view which show. It is a top view which shows the structure which provided the resistance member in the swing arm paper feeding mechanism part of this embodiment. It is a top view which shows the structure which provided the resistance member by making the paper supply gear of the swing arm paper supply mechanism part of this embodiment into the one-way gear.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of the recording apparatus of the present invention.

  The recording apparatus 900 includes a panel unit 600 on which operation buttons and the like for inputting operation instructions to the recording apparatus 900 are arranged, an exterior unit 700, and a scanner unit 800 for scanning and capturing an image. . When the exterior portion 700 is removed, the engine portion 500 is formed inside the recording apparatus 900 as shown in FIG.

  The engine unit 500 includes a paper feeding unit 1, a conveyance unit 2, a carriage unit 3, a drive switching unit 4, a chassis unit 5, a recovery device unit 6, a bottom unit 7, and an electric board 8. ing. The transport unit 2 transports the single recording medium 100 transported by the paper feeding unit 1 to a recording unit that forms an image on the recording medium 100, and discharges the recording medium 100 on which the image is formed (not shown). This is a unit that discharges paper to the center. The carriage unit 3 has a recording head (not shown) for ejecting ink onto the recording surface of the recording medium 100. In the recording unit for image formation, the carriage unit 3 is orthogonal to the conveying direction of the recording medium 100. And is configured to reciprocate.

  As shown in FIGS. 3 and 4, the paper feed unit 1 includes a paper feed cassette unit 12, a swing arm paper feed mechanism unit 14, and a slope separation unit 16.

  The paper feed cassette unit 12 is a recording medium stacking unit for setting the recording medium 100, and is housed in the recording apparatus 900 in a state of being inserted into a bottom frame unit (not shown). As shown in FIG. And a paper feeding outer cassette 122. The paper feeding inner cassette 121 and the paper feeding outer cassette 122 are extendable, and the paper feeding outer cassette 122 is stretched and used when loading a recording medium 100 having a size different from a normal size such as a legal size (LGL size). The The paper feed inner cassette 121 is provided with a side guide L124 and a side guide R125 for positioning and holding the end of the recording medium 100 in the width direction, and the paper feed outer cassette 122 is positioned and held at the rear end of the recording medium 100. An end guide 123 is provided. The end guide 123, the side guide L124, and the side guide R125 are configured so that their positions on the paper feed cassette unit 12 can be changed according to the size of the recording medium 100.

  The end guide 123 is configured to be able to change the position by sliding in the groove portion of the paper feed inner cassette 121. As shown in FIG. 6, a lock pin 123 b that presses the sheet feeding inner cassette 121 by an end guide spring 123 a is provided inside the end guide 123. Accordingly, a click feeling can be obtained when the user operates the end guide 123, and the end guide 123 can hold the rear end of the recording medium 100.

  As shown in FIG. 7, in the side guide L124 and the side guide R125, the holding surface for holding the recording medium 100 is a flat surface, and a rack is provided on the back surface of the holding surface. Further, a side guide gear 115 is provided at the center of the sheet feeding inner cassette 121, and the racks of the side guide L124 and the side guide R125 mesh with each other so as to sandwich the side guide gear 115 therebetween. Thus, when the side guide gear 115 rotates, the side guide L124 and the side guide R125 are configured to move in directions opposite to each other with respect to the width direction of the recording medium 100. As shown in FIG. 8, a side guide spring 125a and a side guide friction pad 125b are provided inside the side guide R125, and the side guide spring 125a presses the side guide friction pad 125b against the sheet feeding inner cassette 121. It is configured. The side guide L124 and the side guide R125 can align the recording medium 100 by the frictional force between the side guide friction pad 125b and the sheet feeding inner cassette 121.

  Further, in the paper feeding inner cassette 121, since the bottom stacked recording medium 100 is not double-fed, a paper feeding roller 132 of a swing arm paper feeding mechanism unit 14 and a paper feeding inner cassette 121 which will be described later come into contact with each other. It has a cassette friction pad 126 in position. In addition, in the same position as the cassette friction pad 126, a cassette roller for causing the sheet feeding roller 132 to idle so as not to bite into the sheet feeding inner cassette 121 when the recording medium 100 is not stacked on the sheet feeding cassette unit 12. 127 is provided.

  As shown in FIG. 9, the slope separating portion 16 is provided with slope members 162 (a slope member L 162 a and a slope member R 162 b) on the slope portion of the base 161. The slope member 162 is partially formed with a hole or notch, and a separation piece 163 and a recording medium front end return mechanism 164 are formed there. The separation piece 163 facilitates separation of the overlapping recording media in order to feed the recording media one by one, and is provided at a position where it comes into contact with the center of the leading end of the recording media 100 to be stacked. Further, as shown in FIG. 10A and FIG. 11, the separation piece 163 moves by driving the switching drive lever 165a between a position protruding from the surface of the slope member 162 and a position retracted. Can do. The recording medium front end returning mechanism 164 is a mechanism that returns the front end of the recording medium to a predetermined position so that the fed recording medium does not cause double feeding, and includes a return plate 164a, a return plate spring 164c, and a cam. And a plate drive shaft 164d. As shown in FIG. 10B, the recording medium front end returning mechanism 164 can rotate around a shaft 164b that is a part of the base 161, and a force is applied toward the base 161 by a return leaf spring 164c. It is configured as follows. On the other hand, since the return plate drive shaft 164d including the cam rotates to push the return plate 164a from the back surface, the surface of the return plate 164a can move to a position protruding from the slope member 162.

  The transport unit 2 that transports the recording medium 100 transported on the surface of the slope separation unit 16 to the recording unit of the recording apparatus 900 includes a transport roller 231. The conveyance roller 231 is disposed in the downstream of the inclined medium separation unit 16 in the conveyance direction of the recording medium 100 and immediately above the surface of the inclined member 162. The same number of driven rollers 232 and driven roller springs 232a as the roller portions 231c of the conveying roller 231 are arranged inside the inclined surface separating portion 16 opposed to the conveying roller 231. The driven roller spring 232 a is a spring shaft that presses the driven roller 232 against the transport roller 231 at the same time as the shaft of the driven roller 232.

  As shown in FIG. 12, the swing arm sheet feeding mechanism unit 14 includes a swing arm 141, a flap sheet 142, a delay gear (drive gear) 143, a clutch mechanism unit 145, a sheet feeding shaft 146, and a sheet feeding input. And a gear 148. The swing arm 141 is provided with a paper feed roller 132 for feeding the recording medium 100. Paper feed rubber 132c is attached to the left and right rollers (paper feed roller L132a and paper feed roller R132b) of the paper feed roller 132, respectively. As shown in FIG. 13, the paper feed roller L132a and the paper feed roller R132b sandwich the bearing portion of the swing arm 141 and the paper feed gear 134, and are fixed in the rotational direction with a single shaft passing through the center of each. Is configured to connect. The first drive train to which the first rotational torque from the paper feed roller 132 is transmitted includes a paper feed roller L132a, a paper feed roller R132b, a paper feed gear 134, and a delay gear 143. A second drive train that transmits a second rotational torque from a drive motor, which is a drive unit (not shown), includes a paper feed input gear 148, a paper feed idler gear 147, and a paper feed shaft 146. Further, a swing arm pressurizing spring (not shown) is configured to apply pressure to the swing arm paper feeding mechanism 14 by a spring force generated between the swing arm pressurizing spring and a bottom frame (not shown). The flap sheet 142 is for stabilizing the posture of the recording medium 100 when the fed recording medium 100 comes into contact with the inclined surface separation portion 16, and is provided on the surface of the swing arm 141 facing the recording medium 100. ing.

  As shown in FIG. 14, the clutch mechanism portion 145 that is a drive connecting portion is formed by combining a delay gear 143, a delay clutch 145 a, a clutch 145 b, and a protrusion 146 b of the paper feed shaft 146. The delay gear 143 that is directly connected to the paper feed gear 134 that rotates together with the paper feed roller 132 has a plurality of ribs formed at certain angular intervals on the gear portion and the side surface portion. The protrusion of the delay clutch 145a is inserted into the space between the ribs and comes into contact with the ribs. The delay clutch 145a has saw-toothed teeth and a hollow cylindrical shaft portion on the opposite side of the protruding portion, and is inserted so that the inner peripheral surface of the clutch 145b is in contact with the shaft portion. The clutch 145b has saw-tooth teeth. As shown in FIG. 15, the saw-tooth teeth are arranged to mesh with the saw-tooth teeth of the delay clutch 145a. When the meshed sawtooth teeth are rotated in one direction, the delay clutch 145a and the clutch 145b rotate together while meshing, and when rotated in the other direction, the meshing is released and the first rotational torque is not transmitted. Is formed. The paper feed shaft 146 is inserted into a through shaft provided at the center of the delay gear 143 and the delay clutch 145a so that the protrusion 146b of the paper feed shaft 146 fits into a notch portion of the clutch 145b.

  A method for feeding a recording medium by the paper feeding device having the above-described configuration will be described.

  The user takes out the paper feed cassette unit 12 from the recording apparatus 900 in order to load the recording medium 100 suitable for forming an image. The user moves the end guide 123, the side guide L124, and the side guide R125 provided in the paper feed cassette unit 12 to the open position according to the size of the recording medium 100, and the plurality of recording media 100 are moved to the paper feed cassette unit. 12 is loaded. When a plurality of recording media 100 are loaded and the end guide 123, the side guide L124, and the side guide R125 are moved to positions where the recording media 100 are held, the paper feed cassette unit 12 is accommodated in the recording apparatus 900.

  When the paper feed cassette unit 12 is set in the paper feed unit 1 of the recording apparatus 900, the paper feed roller 132 provided on the swing arm 141 of the swing arm paper feed mechanism unit 14 is stacked on the top of the paper feed cassette unit 12. In contact with the surface of the recording medium 100. When the surface of the paper feed roller 132 comes into contact with the surface of the uppermost recording medium 100, preparation for conveyance of the recording medium 100 is completed. When image data is input to the recording apparatus 900, a paper feeding step for conveying the recording medium 100 from the paper feeding cassette unit 12 to the recording unit is started.

  In order to transport the recording medium 100 of the paper feed cassette unit 12 to the recording unit, it is necessary to rotate the paper feed roller 132 at the rotational speed Vp. For this purpose, a second rotation torque for rotating the sheet feeding roller 132 at the rotation speed Vp is generated by a sheet feeding roller rotation driving unit (not shown). A sheet feeding roller rotation driving unit (not shown) applies a second rotation torque to the sheet feeding input gear 148, and the second rotation torque is applied to the sheet feeding idler gear 147, the sheet feeding shaft 146, the clutch mechanism unit 145, and the delay gear 143. It is transmitted. At this time, the paper feed roller is not rotating, and the second rotational torque is transmitted in one direction from the clutch 145b of the clutch mechanism 145 to the delay clutch 145a. When the second rotational torque is transmitted to the paper feed gear 134, the paper feed gear 134 is rotated, and the paper feed roller 132 integrated with the paper feed gear 134 is rotated at the rotational speed Vp. In the clutch mechanism 145, the protrusion 146b of the paper feed shaft 146 rotates, so that the clutch 145b itself rotates along the cam surface provided in the notch by rotating in the notch of the clutch 145b. Move forward in the direction. When the clutch 145b moves forward, the sawtooth teeth of the clutch 145b mesh with the sawtooth teeth of the delay clutch 145a, so that a second rotational torque is generated from the paper feed shaft 146 through the clutch mechanism 145 to the delay gear 143. introduce.

  When the paper feed roller 132 rotates, the uppermost recording medium 100 in contact with the paper feed roller 132 moves toward the inclined surface separation unit 16 as shown in FIG. When the leading edge of the uppermost recording medium 100 abuts on the inclined surface separating portion 16, a frictional force is generated between the leading edge of the recording medium 100 and the inclined surface separating portion 16, and the feeding roller 132 is conveyed by this frictional force. Power is great. Therefore, the leading end of the recording medium 100 is conveyed so as to slide along the inclined surface of the inclined surface separating portion 16, and according to this, the entire recording medium 100 is conveyed so as to slide on the inclined surface separating portion 16 by the conveying force of the paper feed roller 132. . As viewed in the conveyance direction of the recording medium 100, the recording medium 100 is sandwiched between a conveyance roller 231 and a driven roller 232 provided downstream of the slope separation unit 16 and is conveyed to the recording unit.

  As shown in FIG. 16B, the rotation speed Vr of the transport roller 231 is faster than the rotation speed Vp of the paper feed roller 132. Therefore, when the recording medium 100 is sandwiched between the conveyance roller 231 and the driven roller 232, the recording medium 100 is conveyed at the speed Vr in accordance with the rotation speed Vr of the conveyance roller 231. When the recording medium 100 is conveyed at the speed Vr, the paper feeding roller 132 is rotated by the recording medium 100 at a first rotational speed that is faster than the rotational speed Vp, thereby generating a first rotational torque. Along with this, the delay gear 143 and the delay clutch 145a meshing with the paper feed roller 132 rotate at the same speed in conjunction with the paper feed roller 132, and the first rotational torque is transmitted. At this time, since the delay clutch 145a and the clutch 145b rotate at different speeds, the clutch 145b rotates in the opposite direction as viewed from the delay clutch 145a. Then, the meshed tooth of the delay clutch 145a and the tooth of the clutch 145b are disengaged, and the delay clutch 145a and the clutch 145b are disconnected. As a result, the paper feed roller 132, the delay gear 143, and the delay clutch 145a rotate in accordance with the conveyance speed of the recording medium 100, and the clutch 145b, the paper feed shaft 146, the paper feed idler gear 147, and the paper feed input gear 148 Rotates at a second rotation speed Vp. Incidentally, between the circumferential load Ft of the paper feed roller 132 when rotating at the rotational speed Vp and the circumferential load Fb of the paper feed roller 132 when rotating following the conveyance speed of the recording medium 100. Holds the relationship Ft <Fb.

  When the clutch mechanism unit 145 is in the disconnected state, the swing arm sheet feeding mechanism unit 14 including the sheet feeding roller 132 is lifted directly above by the rigidity of the recording medium 100 from the sheet feeding start position that contacts the uppermost recording medium 100. When the swing arm sheet feeding mechanism 14 is lifted, the swing arm sheet feeding mechanism 14 attempts to return by its own weight from the lifted position toward the sheet feeding start position. At this time, the paper feed roller 132 rotates along the surface of the recording medium 100 because the clutch mechanism 145 is disconnected. However, the raised swing arm sheet feeding mechanism 14 is lifted again by losing the rigidity of the recording medium 100 before returning to the sheet feeding start position, and the swing arm sheet feeding mechanism 14 bounces on the recording medium 100. There is a risk that. The bounce of the swing arm paper feeding mechanism unit 14 causes the vibration of the recording medium 100, and the vibration of the recording medium 100 generates an abnormal noise.

  As a countermeasure against this, semi-solid oil (grease in the present embodiment) is applied to the inner peripheral surfaces along the central axes of the delay gear 143 and the delay clutch 145a to suppress the rotation speed of the paper feed roller 132. The grease suppresses the rotational slidability between the delay gear 143 and the delay clutch 145a and the paper feed shaft 146, and the rotation speed of the paper feed roller 132 is suppressed by the delay gear 143 becoming difficult to rotate. When the rotation speed of the paper feed roller 132 is suppressed, the swing arm paper feed mechanism unit 14 becomes a resistance because the paper feed roller 132 does not rotate when returning to the paper feed start position by its own weight, and the swing arm paper feed mechanism unit. 14 is kept on the recording medium 100. The swing arm paper feed mechanism unit 14 does not return to the paper feed start position due to its own weight, and is kept lifted on the recording medium 100, so that the swing arm paper feed mechanism unit 14 is prevented from bouncing on the recording medium 100. Can do. Therefore, the vibration of the recording medium 100 is suppressed, the stability of conveyance of the recording medium is improved, and the occurrence of abnormal noise can be suppressed at the same time.

  Note that a method other than the above-described grease may be used as a method of suppressing the rotation speed of the paper feed roller 132. As shown in FIG. 17, the friction member provided in the swing arm paper feeding mechanism unit 14 is formed at a position in contact with the delay gear 143, and by applying a frictional force to the delay gear 143, The rotation speed is suppressed. Further, the clutch mechanism 145 may be eliminated, and the delay gear 143 may have a one-way gear performance. Also, as shown in FIG. 18, the paper feed gear 134 has a one-way gear performance, and a resistance member that gives resistance to the paper feed roller 132 only when the one-way gear idles sandwiches the paper feed gear 134. The structure currently formed may be sufficient.

  As described above, by providing the clutch mechanism unit 145 in the swing arm sheet feeding mechanism unit 14, even if the recording medium 100 is conveyed by the conveying roller 231 having a rotational speed different from that of the sheet feeding roller 132, The rotation speed follows the conveyance speed of the recording medium 100. Therefore, the paper feed roller 132 does not damage the surface of the recording medium 100. Further, the swing arm paper feed mechanism unit 14 performs recording by maintaining the rotational speed of the paper feed roller 132 following the conveyance speed of the recording medium 100 by applying a frictional force to suppress the rotational speed of the paper feed roller 132. Bounding on the medium 100 can be suppressed. Therefore, the vibration of the recording medium 100 can be suppressed and the occurrence of abnormal noise can be suppressed at the same time.

DESCRIPTION OF SYMBOLS 1 Paper feed part 2 Transport part 100 Recording medium 12 Paper feed cassette unit 121 Paper feed inner cassette 122 Paper feed outer cassette 132 Paper feed roller 134 Paper feed gear 14 Swing arm paper feed mechanism part 141 Swing arm 143 Delay gear 145 Clutch mechanism part 146 Feeding shaft 16 Slope separating portion 163 Separating piece 231 Conveying roller 711 Bottom frame

Claims (10)

A recording medium stacking unit for storing a plurality of recording media, a paper feed roller in contact with an uppermost recording medium of the plurality of recording media stacked on the recording medium stacking unit, and a paper feeding mechanism unit,
The paper feed mechanism section is connected to the paper feed roller via a drive gear that transmits a first rotational torque to each other, and a second rotation that rotates the paper feed roller. The second drive train connected to the drive unit for generating torque, and the first drive train and the second drive train are arranged between the first drive train and the first drive train. And a drive connecting portion that transmits the second rotational torque only in one direction to the row.   A recording medium conveying unit positioned downstream of the sheet feeding roller in the conveying direction of the recording medium, and the sheet feeding roller from the recording medium conveyed by the conveying unit to the first drive train; 2. The sheet feeding device according to claim 1, wherein the first rotational torque transmitted through the second drive train is greater than the second rotational torque transmitted from the drive unit to the second drive train.   The first rotational torque is a torque generated when the paper feed roller rotates at a first rotational speed according to a conveyance speed of the recording medium conveyed by the conveyance unit, and the second rotation torque is 3. The sheet feeding device according to claim 2, wherein the driving unit generates a torque for rotating the sheet feeding roller at a second rotation speed that is slower than the first rotation speed. 4.   3. The sheet feeding device according to claim 2, wherein when the first rotational torque is greater than the second rotational torque, the drive coupling unit interrupts transmission of the second rotational torque. 4.   And a resistance member that applies at least a resistance force to the rotation of the sheet feeding roller to the sheet feeding roller when the drive connecting portion interrupts transmission of the second rotational torque. The sheet feeding device according to claim 4.   6. The sheet feeding device according to claim 4, wherein the drive connecting portion is a clutch mechanism portion.   6. The sheet feeding device according to claim 4, wherein the drive connecting portion is a one-way gear.   The semi-solid oil is applied between a drive shaft provided so as to penetrate the center of the drive gear and the drive gear. Paper feeder.   2. A resistance member which is provided so as to contact the drive gear and which gives the drive gear a resistance force against the rotation of the drive gear interlocked with the rotation of the paper feed roller. 8. The sheet feeding device according to any one of items 1 to 7.   10. The paper feeding device according to any one of 1 to 9, a recording unit that forms an image on a recording surface of the recording medium, and a paper discharge unit that discharges the recording medium on which the image is formed. Recording device having.

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