JP2015110482A - Image processing apparatus and sheet feeder mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily eliminate reduction in performance when a retard roller becomes worn.SOLUTION: An image processing apparatus includes: a hopper 4 provided in an apparatus body 2 and stores sheets in a stacked state; a conveyance path 14 for feeding out the sheets in the hopper 4; a feed roller 17 provided to face the conveyance path 14; a retard unit 19 having a retard roller 20 provided across the conveyance path 14 opposed to the feed roller 17 and a torque limiter 21 coaxially connected to the retard roller 20; and urging means 29 that urges the retard unit 19 such that the retard roller 20 is press-contacted with the feed roller 17. The retard unit 19 is provided to be detachably attached to the apparatus body 2.

Description

  The present invention relates to an image processing apparatus for forming an image on a sheet such as a check or recording paper, and reading an image on the sheet, and more particularly, to separate sheets stacked and accommodated in the apparatus to convey the sheet. The present invention relates to a sheet feeding structure for feeding to a sheet.

  Usually, this type of image processing apparatus is provided with a medium separation mechanism for preventing the stacked and stored sheets from being sent to the sheet conveying path in a state of being overlapped. Patent Document 1 discloses a structure using a retard roller as an example of such a medium separation mechanism. Here, by passing the sheet to be conveyed between the feed roller and the retard roller pressed against the feed roller under a rotational load, the double overlapped sheet will pass between the two rollers. In this case, the feeding of the retard roller side sheet is restricted by the frictional force generated between the retard roller side sheet and the retard roller.

JP 2009-18891 A

  In Patent Document 1, in order to maintain the pressing load on the separation roller of the retard roller at an appropriate value, a guide for sliding the retard roller in a direction orthogonal to the sheet feeding direction is applied to the reaction force acting on the retard roller from the sheet. It is supported by the surface. By adopting such a structure, in Patent Document 1, the support structure of the retard roller is complicated, and the retard roller cannot be easily replaced.

  In general, the retard roller generates a large braking force, but wears quickly. Such wear causes a decrease in the nip force and a decrease in the braking force, and may lead to a phenomenon that the sheet is double fed or the sheet itself is not delivered. In this case, if the retard roller cannot be easily replaced, the life of the sheet feeding mechanism or the entire image processing apparatus will be affected.

  Such a problem is common to the sheet feeding mechanism provided with the retard roller or the image processing apparatus. In the present invention, even when the retard roller is worn, it is an object to easily eliminate the decrease in performance. .

  In order to solve at least a part of the above problems, the present invention can be realized as the following application examples.

Application Example 1 An image processing apparatus for performing at least one of image formation on a sheet and reading of an image on the sheet, the apparatus main body, provided in the apparatus main body, and accommodating the sheets in a stacked state A sheet storage portion to be fed, a feed path for sending out the sheet in the sheet storage portion, a feed roller provided facing the feed path, and a feed roller provided opposite to the feed path across the feed path. A retard unit having a retard roller and a torque limiter coaxially connected to the retard roller, and biasing means for biasing the retard unit so that the retard roller is in pressure contact with the feed roller, The retard unit is detachably provided on the apparatus main body.

  Thus, since the retard roller is unitized and can be detached from the apparatus main body, when the retard roller is worn, the retard roller can be replaced as a unit.

Application Example 2 In the image processing apparatus of Application Example 1, the apparatus main body includes a shaft body that extends in a direction intersecting the sheet feeding direction, and the retard unit is provided with an insertion hole. The retard unit is supported so as to be swingable around the shaft body when the shaft body is inserted into the insertion hole.
With such a configuration, the retard unit can be easily attached to and detached from the apparatus main body by inserting the insertion hole of the retard unit through the shaft body.

Application Example 3 In the image processing apparatus according to Application Example 2, the shaft body is disposed to protrude upward from the apparatus body, and the retard unit is fitted into the shaft body from above. Is attached to the apparatus main body.
With this configuration, the insertion hole of the retard unit can be easily inserted into the shaft body.

Application Example 4 In the image processing apparatus according to any one of Application Examples 1 to 3, the urging unit includes a pressing plate that contacts the retard unit from the rear toward the feed roller, and the pressing plate. And an elastic body that urges the feed roller toward the feed roller.
With this configuration, the retard unit can be pressed against the feed roller with a simple structure.

Application Example 5 In the image processing apparatuses according to Application Examples 1 to 4, the apparatus main body is provided with a pressing portion that contacts the retard unit and prevents the retard unit from being lifted.
With such a configuration, it is possible to prevent the redder unit from separating and moving upward.

Application Example 6 In the image processing apparatus according to Application Example 5, the retard unit is urged by the urging unit and is engaged with the pressing portion.
With such a configuration, the retard unit can be easily engaged with the pressing portion.

Application Example 7 In the image processing apparatus according to any one of Application Examples 1 to 6, the sheet storage unit stores the sheet in an upright state, and the sheet is in an upright state in the delivery path. Sent out.
With such a configuration, the retard unit can be arranged so that the axial direction of the retard roller is the vertical direction.

(Application example 8) The image processing apparatus according to any one of application examples 1 to 7, wherein the apparatus main body includes a first member having a plate-like portion arranged in an upright state, and the plate-like portion. The second member is disposed between the plate-like portion and the plate-like portion as the delivery path. A second portion formed, and at least a portion of the retard unit is disposed between the first portion and the second portion when viewed from the sheet feeding direction. .
By adopting such a structure, it is possible to reduce the size of the sheet feeding structure viewed from the sheet feeding direction.

Application Example 9 A sheet feeding structure for separating and feeding sheets stacked and accommodated in an apparatus main body to a sheet conveyance path, the feed roller being rotationally driven in the sheet feeding direction, and the feed roller A retard roller that contacts from a position across the sheet conveyance path, a torque limiter that is connected to the retard roller and restricts rotation of the retard roller by a torque equal to or less than a predetermined value, and the retard roller and the torque limiter A case that is rotatably accommodated on the same axis, urging means that urges the case in a predetermined direction toward the feed roller, and that the case can be swung in the predetermined direction, and to the apparatus main body. And an attachment / detachment mechanism that enables attachment / detachment of the case.

  With such a configuration, the retard roller can be attached to and detached from the apparatus main body by detaching the case from the apparatus main body.

(Application Example 10) The sheet feeding structure according to Application Example 9, wherein the attachment / detachment mechanism includes a shaft body fixed to the apparatus main body, and an insertion hole provided in the case and through which the shaft body can be inserted. It is prepared for.
With such a configuration, the attachment / detachment mechanism can be easily configured.

Application Example 11 In the sheet feeding structure according to Application Example 10, the shaft body is arranged in the vertical direction.
With such a configuration, the insertion hole of the case can be fitted to the shaft body from above.

Application Example 12 In the sheet feeding structure according to Application Example 10 or 11, rotation axes of the retard roller and the torque limiter are arranged in parallel to the shaft body.
With such a configuration, the case can be swingably supported by the shaft body in a direction orthogonal to the rotational axes of the retard roller and the torque limiter.

(Application Example 13) The sheet feeding structure according to any one of Application Examples 9 to 12,
The urging means includes a pressing plate that contacts the case from the predetermined direction, and a pressing spring provided between the pressing portion and the apparatus main body.
With such a configuration, the case containing the retard roller can be uniformly pressed in the direction of the feed roller with a simple configuration.

Application Example 14 In the sheet feeding structure according to Application Example 13, the pressing plate is swingably attached to the apparatus main body.
With such a configuration, even when the case is to be pressed uniformly by the pressing plate, only one pressing spring needs to be provided.

Application Example 15 In the sheet feeding structure of Application Example 13 or 14, the case is provided with a contact surface that contacts the pressing plate.
With such a configuration, the urging force of the pressing spring can be uniformly transmitted from the pressing plate to the case.

It is an appearance perspective view showing a check processing device concerning an embodiment of the invention. It is a top view inside the check processing apparatus shown in FIG. FIG. 3 is a plan view of a portion related to a sheet feeding structure in the check processing apparatus shown in FIG. 2. FIG. 4 is a perspective view of the sheet feeding structure shown in FIG. 3. FIG. FIG. 6 is an exploded perspective view when the sheet feeding structure is viewed from the direction of arrow IV in FIG. 5.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external perspective view of a check processing device (image processing device) 1 according to an embodiment of the present invention. The check processing device 1 has a hopper (sheet storage portion) 4 for stacking and storing sheets 3 such as checks and the like, and a transport path 5 for transporting the sheet 3 sent from the hopper 4. The processing unit 6 that performs image printing, data reading, scanning, or the like on the sheet 3 conveyed along the conveyance path 5, and the sheet 3 discharged through the conveyance path 5 after the processing in the processing unit 6 ends. Etc., and a discharge section 7 for receiving the same from the conveyance path 5.

  FIG. 2 is a plan view showing the inside of the apparatus main body 2 of the check processing apparatus 1. As shown in the drawing, the periphery of the portion of the apparatus main body 2 where the hopper 4 is provided is formed as a sheet feeding structure 10 for feeding the sheet 3 to the conveyance path 5.

  FIG. 3 is a plan view showing the sheet feeding structure 10 of the apparatus main body 2 in more detail. As shown in the drawing, the sheet feeding structure 10 includes a first member 12 having a plate-like portion 11 arranged in an upright state, and a second member 13 arranged along the first member 11, The hopper 4 is formed between the first member 12 and the second member 13.

  The second member 13 includes a first portion 13a that constitutes a portion of the hopper 4 on the sheet insertion port 4a side, and a second portion 13b that constitutes a portion on the conveyance path 5 side in a stepped shape. It has become. By arranging such a second member 13 along the plate-like portion 11 of the first member 12, a space between the plate-like portion 11 and the first portion 13a arranged in a separated state is formed as a hopper 4. At the same time, a space between the plate-like portion 11 and the second portion 13 b arranged close to each other is formed as a delivery path 14 for feeding the sheet inside the hopper 4 toward the conveyance path 5.

  Further, in the sheet feeding structure 10 (apparatus main body 2), a pickup roller 16 for separating sheets in the hopper 4 and a sheet separated by the pickup roller 16 are sent to the conveying path 5 through the sending path 14. The feed roller 17 is provided. The pickup roller 16 is provided in the vicinity of the opening 11a provided in the plate-like portion 11 of the first member 12, and is configured to be able to appear and disappear inside the hopper 4 through the opening 11a. On the other hand, the feed roller 17 is disposed so that a part of the feed roller 17 is exposed to the delivery path 14 through the opening 11 b provided to face the delivery path 14 in the plate-like portion 11.

  A retard unit 19 is provided at a position facing the feed roller 17 across the delivery path 14. The retard unit 19 is partly accommodated in a step formed by the first portion 13a and the second portion 13b of the second member 13, that is, from the sheet conveying direction (A direction in FIG. 3). As seen, the first portion 13a and the second portion 13b are disposed so as to be accommodated.

4 is a perspective view of the sheet feeding structure 10 when viewed from the IV direction in FIG. The retard unit 19 includes a retard roller 20 that is pressed against the feed roller 17 from a position opposed to the delivery path 14, a torque limiter 21 that is coaxially connected to the retard roller 20, the retard roller 20 and the torque limiter. And a case 22 for housing 21.

  The torque limiter 21 is formed so that the rotating shaft 21a rotates only when a torque greater than a predetermined value is applied. Here, the rotation of the retard roller 20 is restricted by the torque limiter 21 when a torque less than a predetermined value is applied to the retard roller 20 by connecting the rotating shaft 21a to the retard roller 20. It is like that.

  FIG. 5 is an exploded perspective view of the sheet feeding structure 10. As shown in the figure, the retard unit 19 is detachable from the sheet feeding structure 10 (apparatus main body 2). The attachment / detachment mechanism of the retard unit 19 is configured as follows. That is, the case 22 of the retard unit 19 is provided with an insertion hole 24 that passes through in the same direction as the axial direction (vertical direction in the drawing) of the retard roller 20 and the torque limiter 21, and the sheet feeding structure 10 (apparatus body 2). ), The shaft body 26 is provided in an upright state from the bottom plate 25. The retard unit 19 can be attached to the sheet feeding structure 10 by being disposed from above the sheet feeding structure 10 while the shaft body 26 is inserted through the insertion hole 24. The retard unit 19 attached in this way can swing in the B direction in FIGS. 3 and 4 and in the opposite direction with the shaft body 26 as the center of rotation. Further, in this case, since the insertion hole 24 and the shaft body 26 are merely fitted, the retard unit 19 can be easily detached from the sheet feeding structure 10. In addition, the handle part 28 is provided in the upper part of the case 22 of the retard unit 19, and the attachment / detachment work of the retard unit 19 can be easily performed by holding the handle part 28 by hand.

  As shown in FIGS. 4 and 5, the retard roller 20 is located with respect to the feed roller 17 behind the retard unit 19 when viewed from the delivery path 14 side (on the side opposite to the feed roller 17 when viewed from the retard unit 19). An urging means 29 is provided for energizing. As shown in FIG. 5, the biasing means 29 includes a pressing plate 30 arranged in an upright state, and a pressing spring (elastic body) 31 for biasing the pressing plate 30 toward the delivery path 14. It has a configuration with.

  6 is a perspective view of the sheet feeding structure 10 when viewed from the VI direction in FIG. As shown in the drawing, one end 31 a of the presser spring 31 is attached to one end 30 a of the presser plate 30, and the other end 31 b is fixed to the fixing portion 32 provided on the bottom plate 25 of the sheet feeding structure 10. Attached. On the other hand, the other end 30b of the presser plate 30 is provided with insertion holes 30c, 30c separated from each other in the vertical direction, and a shaft body provided upright from the sheet feeding structure 10 is provided in the insertion holes 30c, 30c. 33 is inserted. Thus, the pressing plate 30 is configured to be swingable about the shaft body 33 and is always biased toward the delivery path 14 by the pressing spring 31. In this case, the rear side of the case 22 of the retard unit 19 (on the side opposite to the delivery path 14) is formed as an abutment surface 22 a for abutting against the retainer plate 30, whereby the urging force by the retainer spring 31 is suppressed. It is transmitted uniformly to the case 22 through the plate 30.

  Further, as shown in FIG. 6, a protruding portion 35 is provided on the side surface 13 c of the second member 13 in the vicinity of the attachment target position of the retard unit 19. The protrusion 35 lifts the retard unit 19 attached to the sheet feeding structure 10 by engaging an engaging portion 22b (see FIG. 5) provided on the case 22 of the retard unit 19 from below. It functions as a holding part that prevents The protruding portion 35 and the engaging portion 22 are engaged with each other when the retard unit 19 is urged by the urging means 29 and swings in the B direction in FIGS. Are moved away from each other and disengaged from each other.

Next, the operation of the sheet feeding structure 10 in the check processing apparatus 1 will be described.
In the sheet feeding structure 10, the urging force of the pressing spring 31 acts on the retard unit 19 through the pressing plate 30, so that the retard roller 20 is constantly pressed against the feed roller 17. When one of the sheets 3 housed in an upright state in the hopper 4 is moved by the operation of the pickup roller 16 with respect to the feeding path 14, first, the leading end of the sheet 3 is moved to the feed roller 17 and the retard. It reaches between the rollers 20. When the sheet 3 passes between the feed roller 17 and the retard roller 20, normally, a friction force similar to the friction force acting between the feed roller 17 and the sheet 3 is normally applied to the sheet 3 and the retard roller 20. Therefore, the retard roller 20 rotates along with the paper feed of the sheet 3 by using the frictional force generated between the sheet 3 and the retard roller 20 as a driving force.

  On the other hand, when the sheet 3 is double fed between the feed roller 17 and the retard roller 20, the sheet 3 on the feed roller 17 side is conveyed by the frictional force generated between the sheet 3 and the feed roller 17. Since a sufficient frictional force does not act between the sheet 3 on the feed roller 17 side and the sheet 3 on the retard roller 20 side, the conveying force by the feed roller 17 is greatly transmitted to the sheet 3 on the retard roller 20 side. Never happen. Here, since the retard roller 20 is connected to the torque limiter 21 so as not to rotate even when a torque of a predetermined value or less acts, the conveying force acting on the sheet 3 on the retard roller 20 side is: Even if it is transmitted to the retard roller 20, the retard roller 20 is not rotated, so that the retard roller 20 acts to restrain the sheet 3 on the retard roller 20 side. Here, as the torque limiter 21, it is assumed that a torque threshold value that allows rotation is appropriately set so that double feeding of the sheet 3 can be prevented.

  Since the retard roller 20 is frequently loaded in this way, it gradually wears over time. However, when the retard roller 20 is worn, the existing retard unit 19 is removed and the retard roller 20 is replaced with a new one. By exchanging, the replacement of the retard roller 20 can be completed easily. When removing the retard unit 19, the cover of the check processing device 1 is opened so that the sheet feeding structure 10 is exposed to the outside, and the holding plate 30 is separated from the feed roller 17 in this state (see FIGS. 3 and 4). By moving in the direction opposite to the middle B direction), the urging of the retard unit 19 by the pressing spring 31 is released. And if the retard unit 19 is moved slightly in the direction away from the feed roller 17, the engagement between the engaging portion 22b and the protruding portion 35 is also released, so by holding the handle portion 28 etc. by hand, The retard unit 19 can be easily removed upward.

  Further, the new retard unit 19 may be attached in the reverse procedure. When the retard unit 19 is attached so that the shaft body 26 is inserted through the insertion hole 24, the retard unit 19 is urged by the urging means 29 so that the retard roller 20 is pressed against the feed roller 17 and protrudes. The portion 35 contacts the contact surface 22 a of the case 22 of the retard unit 19. Accordingly, the retard unit 19 can be prevented from being lifted, and the retard unit 19 can be easily disposed at a predetermined position.

  As described above, in the check processing device 1 according to the present embodiment, the retard roller 20 is unitized as the retard unit 19 and can be detached from the apparatus main body 2, so that the retard roller 20 is worn. In addition, the retard roller 20 can be replaced together with the retard unit 19. As a result, it is possible to prevent the performance of the check processing device 1 from being deteriorated due to the wear of the retard roller 20, and as a result, the lifetime of the entire check processing device 1 can be prolonged.

  The retard unit 19 can be easily attached to and detached from the apparatus main body 2 by inserting the insertion hole 24 provided in the case 22 of the retard unit 19 through the shaft body 26 arranged in the vertical direction. In particular, the shaft body 26 is arranged to project upward from the apparatus main body 2, and the retard unit 19 can be attached to the apparatus main body 2 by fitting the insertion hole 24 to the shaft body 26 from above. The replacement work of the retard unit 19 can be performed from above with a high degree of work freedom, and the replacement workability is good.

  Further, the retard unit 19 is configured to be swingable around the shaft body 26, and an urging means 29 for urging the retard roller 20 toward the feed roller 17 is provided with a pressing plate 30 and the pressing plate 30 as a feed roller. Since the configuration includes the pressing spring 31 that biases the retard unit 19, the retard unit 19 can be uniformly pressed by the pressing plate 30 even if the retard unit 19 is slightly misaligned. Therefore, high-precision assembly is unnecessary and the degree of freedom in design is high. Further, since the pressing plate 30 is supported so as to be swingable, it is only necessary to provide the pressing spring 31 in one place, and the cost of components can be suppressed.

  Further, since the apparatus main body 2 is provided with the protruding portion 35 that comes into contact with the retard unit 19 and prevents it from being lifted, the retard unit 19 can be prevented from detaching and moving upward, so that the retard roller 20 is stabilized. It is possible to exert its function.

  Further, in the check processing device 1, since the sheet 3 is accommodated in the hopper 4 in an upright state and the sheet 3 is also sent up in the delivery path 14, the axial direction of the retard roller 20 is in the vertical direction. It is possible to arrange the retard unit 19 in the above, and the mounting structure of the retard unit 19 as described above can be easily realized.

  The retard unit 19 is disposed at least partially between the first portion 13a and the second portion 13b of the second member 13 when viewed from the feeding direction of the sheet 3 (A direction in FIG. 3). Therefore, it is possible to reduce the horizontal dimension of the sheet feeding structure 10 in which a large number of devices are arranged along the conveyance path 5. Thereby, size reduction of the check processing apparatus 1 whole can be achieved.

  In addition, since the rotation shafts of the retard roller 20 and the torque limiter 21 are arranged in a direction parallel to the shaft body 26, the shaft body 26 is set as a center in a direction orthogonal to the rotation shafts of the retard roller 20 and the torque limiter 21. The retard unit 19 is swung. As a result, the retard roller 20 can be appropriately brought into pressure contact with the feed roller 17 while making the retard unit 19 swingable.

  Further, since the retard roller 20 and the torque limiter 21 are coaxially arranged in the vertical direction, the retard unit 19 does not increase in size in the horizontal direction in which a large number of devices are arranged along the conveyance path 5, The fit is good. Thereby, size reduction of the whole apparatus can be achieved.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be employed without departing from the spirit of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Check processing apparatus (image processing apparatus), 2 ... Apparatus main body, 3 ... Sheet, 4 ... Hopper (sheet accommodating part), 5 ... Conveyance path, 10 ... Sheet feeding structure, 11 ... Plate-shaped part, 12 ... No. One member, 1
DESCRIPTION OF SYMBOLS 3 ... 2nd member, 13a ... 1st part, 13b ... 2nd part, 14 ... Delivery path, 16 ... Pick-up roller, 17 ... Feed roller, 19 ... Retard unit, 20 ... Retard roller, 21 ... Torque limiter, 21a ... rotating shaft, 22 ... case, 22a ... abutting surface, 26 ... shaft body, 29 ... biasing means, 31 ... pressing spring (elastic body), 35 ... projecting part (pressing part)

(Application Example 13) A sheet feeder mechanism as set forth in application Example 9 in any one of 12, wherein the biasing means includes a pressing plate which contacts from said predetermined direction relative to said casing, said push even parts A pressing spring provided between the apparatus main body and the apparatus main body is provided.
With such a configuration, the case containing the retard roller can be uniformly pressed in the direction of the feed roller with a simple configuration.

It is an appearance perspective view showing a check processing device concerning an embodiment of the invention. It is a top view inside the check processing apparatus shown in FIG. FIG. 3 is a plan view of a portion related to a sheet feeding structure in the check processing apparatus shown in FIG. 2. FIG. 4 is a perspective view of the sheet feeding structure shown in FIG. 3. FIG. FIG. 6 is an exploded perspective view when the sheet feeding structure is viewed from the direction of arrow VI in FIG. 5.

FIG. 5 is an exploded perspective view of the sheet feeding structure 10. As shown in the figure, the retard unit 19 is detachable from the sheet feeding structure 10 (apparatus main body 2). The attachment / detachment mechanism of the retard unit 19 is configured as follows. That is, the case 22 of the retard unit 19 is provided with an insertion hole 24 penetrating in parallel with the axial direction (vertical direction in the drawing) of the retard roller 20 and the torque limiter 21 and the sheet feeding structure 10 (apparatus body 2). The shaft body 26 is provided in a standing state from the bottom plate 25. The retard unit 19 can be attached to the sheet feeding structure 10 by being disposed from above the sheet feeding structure 10 while the shaft body 26 is inserted through the insertion hole 24. The retard unit 19 attached in this way can swing in the B direction in FIGS. 3 and 4 and in the opposite direction with the shaft body 26 as the center of rotation. Further, in this case, since the insertion hole 24 and the shaft body 26 are merely fitted, the retard unit 19 can be easily detached from the sheet feeding structure 10. In addition, the handle part 28 is provided in the upper part of the case 22 of the retard unit 19, and the attachment / detachment work of the retard unit 19 can be easily performed by holding the handle part 28 by hand.

Claims (15)

An image processing apparatus for performing at least one of image formation on a sheet and reading of an image on the sheet,
The device body;
A sheet storage portion provided in the apparatus main body for storing the sheets in a stacked state;
A delivery path for delivering the sheet in the sheet accommodating portion;
A feed roller provided facing the delivery path;
A retard roller provided opposite to the feed roller across the delivery path; a retard unit having a torque limiter connected coaxially to the retard roller; and the retard roller in pressure contact with the feed roller An urging means for urging the retard unit;
The retard unit is an image processing apparatus detachably provided on the apparatus main body. The image processing apparatus according to claim 1,
The apparatus main body includes a shaft body extending in a direction intersecting with the feeding direction of the sheet,
The retard unit is provided with an insertion hole,
The retard unit is supported by the shaft body so as to be swingable around the shaft body when the shaft body is inserted through the insertion hole. The image processing apparatus according to claim 2,
The shaft body is arranged to project upward from the apparatus main body,
The retard unit is attached to the apparatus main body by fitting the insertion hole from above into the shaft body. The image processing apparatus according to any one of claims 1 to 3,
The urging means includes an pressing plate that comes into contact with the retard unit from the rear toward the feed roller, and an elastic body that urges the pressing plate toward the feed roller. 5. The image processing apparatus according to claim 1, wherein the apparatus main body is provided with a pressing portion that contacts the retard unit and prevents the retard unit from being lifted. The image processing apparatus according to claim 5, wherein
The image processing apparatus according to claim 1, wherein the retard unit is urged by the urging means and engages with the pressing portion. The image processing apparatus according to any one of claims 1 to 6,
The sheet accommodating portion accommodates the sheet in an upright state,
The image processing apparatus, wherein the sheet is sent out in an upright state on the sending path. The image processing apparatus according to any one of claims 1 to 7,
The apparatus main body has a first member having a plate-like portion arranged in a standing state, and a second member arranged along the plate-like portion,
The second member has a first portion formed as the sheet accommodating portion between the plate-like portions and a second portion formed as the delivery path between the plate-like portions. And
At least a part of the retard unit is disposed between the first part and the second part as viewed from the sheet feeding direction. A sheet feeding structure for separating and feeding the sheets stacked and accommodated in the apparatus main body to the sheet conveyance path,
A feed roller that is rotationally driven in the sheet feeding direction;
A retard roller in contact with the feed roller from a position sandwiching the sheet conveyance path;
A torque limiter that is connected to the retard roller and restricts rotation of the retard roller by a torque equal to or less than a predetermined value;
A case that accommodates the retard roller and the torque limiter so as to be rotatable coaxially; and an urging unit that urges the case in a predetermined direction toward the feed roller;
A sheet feeding structure comprising: an attachment / detachment mechanism that enables the case to swing in the predetermined direction and allows the case to be attached to and detached from the apparatus main body. The sheet feeding structure according to claim 9,
The sheet feeding structure, wherein the attachment / detachment mechanism includes a shaft body fixed to the apparatus main body, and an insertion hole provided in the case through which the shaft body can be inserted. The sheet feeding structure according to claim 10,
The shaft feeding structure is characterized in that the shaft body is arranged in a vertical direction. The sheet feeding structure according to claim 10 or 11,
The sheet feeding structure according to claim 1, wherein rotation axes of the retard roller and the torque limiter are arranged in parallel to the shaft body. The sheet feeding structure according to any one of claims 9 to 12,
The sheet feeding structure, wherein the urging unit includes a pressing plate that contacts the case from the predetermined direction, and a pressing spring provided between the pressing portion and the apparatus main body. The sheet feeding structure according to claim 13,
The sheet feeding structure, wherein the pressing plate is swingably attached to the apparatus main body. The sheet feeding structure according to claim 13 or 14,
The sheet feeding structure according to claim 1, wherein the case is provided with a contact surface that contacts the pressing plate.

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