JP5949633B2 - Sheet conveying device, image reading device, and separation pad assembly - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that conveys a sheet, an image reading apparatus that reads an image of a sheet conveyed by the sheet conveying apparatus, and a separation pad set that can be used for separating the sheet.

  Conventionally, in a sheet conveying apparatus that conveys a sheet, the sheet is conveyed by passing between a roller that conveys the sheet by rotating and a separation pad made of an elastic material whose one surface contacts the outer peripheral surface of the roller. There is a case. In that case, even when a plurality of sheets are stacked and held, the sheets can be separated and conveyed one by one by conveying the sheet between the roller and the separation pad.

  However, the separation pad is formed of an elastic material such as rubber, and abnormal noise due to friction may be generated between the separation pad and the sheet during conveyance of the sheet. Therefore, it has been proposed to reduce noise by attaching a damping rubber or the like to the other surface of the separation pad (see, for example, Patent Document 1).

JP-A-8-91608

  However, simply attaching a damping rubber or the like on the other surface of the separation pad may not sufficiently suppress the vibration and may not sufficiently suppress abnormal noise. Therefore, the present invention can be applied to a sheet conveying apparatus capable of satisfactorily suppressing the occurrence of abnormal noise during sheet conveyance, an image reading apparatus including the sheet conveying apparatus, and the sheet conveying apparatus or the image reading apparatus. An object of the present invention is to provide a separation pad set including a separate separation pad.

  In order to achieve the above object, the sheet conveying apparatus of the present invention includes a first casing that rotatably supports a roller that conveys a sheet, a second casing connected to the first casing, and the first casing. 2 a flat separation pad having a contact surface that is supported by the housing and that imparts conveyance resistance to the sheet at a position facing the roller, and a back surface on the back side of the contact surface; an upstream end in the sheet conveyance direction; The downstream end portion is adhered to the back side surface, and a film is disposed so as to be bent so that an intermediate portion between the upstream end portion and the downstream end portion is lifted from the back side surface, and the second casing. A first contact portion that contacts the upstream end portion of the film or the back side surface of the separation pad that protrudes outside the upstream end portion; and the second housing, the first contact portion, Protrudes outside the downstream end or downstream end A second contact portion in contact with the back side surface of the separation pad, provided on the second body, and characterized in that and a third contact portion for contact with said intermediate portion of the film.

  In the sheet conveying apparatus of the present invention configured as described above, a flat plate-shaped separation pad having a contact surface that imparts conveyance resistance to the sheet at a position facing the roller and a back side surface on the back side of the contact surface includes the following: The film is stuck like this. That is, both end portions of the film in the sheet conveying direction are attached to the back side surface, and an intermediate portion between the both end portions of the film is bent and disposed so as to be lifted from the back side surface.

  And the three contact portions provided in the second housing that supports the separation pad are the both end portions of the film or the back side surface of the separation pad that protrudes outside the both end portions and the intermediate portion of the film. And three places. For this reason, the film acts as a damper between the second housing and the separation pad to suppress vibration of the separation pad, and it is possible to satisfactorily suppress the generation of abnormal noise during sheet conveyance.

  The separation pad is supported by the second housing with the upstream side in the sheet conveying direction as a base end, and the end of the separation pad opposite to the base end side is the end of the film. It may be disposed at a position facing the outer peripheral surface of the roller across the separation pad, and may be pressed toward the rotating shaft of the roller by the second contact portion. In that case, the vibration suppressing effect on the separation pad by the film becomes more prominent, and the generation of the abnormal noise can be further suppressed.

  In the present invention, the second housing is connected to the first housing so that the separation pad can be displaced between a proximity position where the separation pad is close to the roller and a separation position where the separation pad is separated from the roller. May be.

  In this case, a rocking shaft is provided at a position shifted to either side of the sheet conveyance direction from the separation pad, and the first housing and the second housing are rocked about the rocking shaft. It may be movably connected.

  In the present invention, the separation pad may be detachably supported on the second housing. In this case, the separation pad can be easily exchanged as follows by attaching and detaching the separation pad as a separation pad set integrated with the film.

  In the present invention, since both ends of the film are attached to the separation pad in advance, the separation pad can be easily changed even by a general user who has no specialized knowledge by exchanging them as an integral separation pad group. Can be replaced. That is, it is conceivable to arrange the film so as to act as a damper in an arrangement different from the present invention, such as arranging a film between the free end of the separation pad and the second casing. A typical user may not be able to properly place the film during replacement. In contrast, in the present invention, since the film is positioned by sticking both ends to the separation pad in advance, it is easy for a general user to replace the separation pad. Then, by replacing the separation pad that has been worn by use with a new one, the sheets can be separated and conveyed one by one through the roller and the separation pad.

  In addition, when the separation pad can be exchanged in this way, if the second housing can be displaced between the proximity position and the separation position, the replacement becomes even easier, and the second housing can be moved from the separation pad in any direction of sheet conveyance. Swinging about the swinging shaft at a position shifted to either side makes it possible to increase the separation distance between the separation pad and the roller, making replacement even easier.

  Further, an image reading apparatus of the present invention made to achieve the above object is a reading device for reading an image of a sheet conveyed through any of the sheet conveying apparatus described above and between the roller and the separation pad. And a section.

  In the image reading apparatus of the present invention configured as described above, an image of a sheet conveyed through between the roller of the sheet conveying apparatus and the separation pad can be read via the reading unit. For this reason, it is possible to satisfactorily suppress the generation of abnormal noise during the reading operation by the reading unit.

  Further, the separation pad set of the present invention made to achieve the above object is a flat plate having a contact surface that comes into contact with a conveyed sheet and imparts conveyance resistance to the sheet, and a back surface on the back side of the contact surface. And a film in which both end portions in the sheet conveying direction are attached to the back side surface, and the intermediate portion between the both end portions is bent and arranged so as to be lifted from the back side surface. It is characterized by.

  For this reason, by providing the separation pad set of the present invention in the sheet conveying apparatus or the image reading apparatus so that the contact surface faces the roller side, the sheet conveying apparatus or the image reading apparatus can be easily configured. In the sheet conveying apparatus or the image reading apparatus thus provided with the separation pad set, the vibration of the separation pad is suppressed, so that it is possible to favorably suppress the generation of abnormal noise during sheet conveyance.

  In the separation pad set of the present invention, one end is sandwiched between one of the both end portions of the film and the back side surface of the separation pad, and the other end extends along the back side surface of the separation pad. May further comprise an elastomer sheet disposed unconstrained between the intermediate portion of the film and the back side surface of the separation pad. When such a separation pad is provided in the sheet conveying apparatus or the image reading apparatus, vibration of the separation pad can be suppressed even by an elastomer sheet, and the generation of the abnormal noise can be further suppressed. it can.

It is a perspective view showing the state which opened the tray of the image reading apparatus to which this invention is applied. It is a perspective view showing the state which closed the tray of the image reading apparatus. It is the sectional view on the AA line of FIG. FIG. 3 is a cross-sectional view illustrating a configuration in the vicinity of a separation roller of an image reading device. It is the perspective view and top view showing the structure of the separation pad of the image reading apparatus. It is the perspective view and the exploded perspective view showing the structure of the fixing member of the image reading apparatus. It is a perspective view showing the state where the 2nd case of the image reading device was opened. It is the BB sectional view taken on the line of FIG. It is a perspective view showing the replacement | exchange method of a separation pad.

  Next, an embodiment of the present invention will be described with an example. The image reading apparatus 1 exemplified in this embodiment reads an image of a document and writes data corresponding to the read image into a storage medium such as a removable memory, or a personal computer or the like via a wired or wireless communication unit. Or an external storage device. In the following description, the respective parts of the image reading apparatus 1 will be described using the respective directions of the top, bottom, left, and right, which are also shown in the drawing, in order to facilitate understanding of the relative positional relationship between them.

[Schematic Configuration of Embodiment]
FIG. 1 is a perspective view illustrating a configuration of the image reading apparatus 1. As shown in FIG. 1, the image reading apparatus 1 includes a first tray 3, a second tray 5, a third tray 7, and an extension tray 9 that hold a sheet such as a document. The body 10 is provided so that it can be opened and closed.

  The first tray 3 is provided at the rear portion of the housing 10, that is, upstream in the sheet conveyance direction, so as to be swingable about a left-right axis via a hinge 3A (see FIG. 7). The second tray 5 is connected to the end of the first tray 3 opposite to the end connected to the housing 10 via a hinge 5A so as to be swingable about a horizontal axis. . Further, the third tray 7 is connected to the end of the second tray 5 opposite to the end connected to the first tray 3 via a hinge 7A so as to be swingable about a horizontal axis. Has been.

  When the first tray 3, the second tray 5, and the third tray 7 are opened in a direction away from the housing 10, the first tray 3, the second tray 5, and the third tray 7, as shown in FIG. Each surface constitutes a series of surfaces for holding a sheet such as a document. In addition, a pair of extension trays 9 that are swingable about an axis provided in the central portion in the left-right direction are provided on the edge of the third tray 7 opposite to the side connected to the second tray 5. ing. The third tray 7 can be extended by extending the extension tray 9. The extension tray 9 is accommodated in the third tray 7 through an opening 7B formed at the edge of the third tray.

  When the extension tray 9 is accommodated in the third tray 7 and the first tray 3, the second tray 5, and the third tray 7 are closed in the direction approaching the housing 10, the first tray 3, as shown in FIG. The tray 3 to the third tray 7 are disposed along the outer surface of the housing 10.

  As shown in FIGS. 1 and 3, the housing 10 includes a second housing 11, a first housing 12, and a pair of side plates 13. The second casing 11 is disposed on the first casing 12 and the pair of side plates 13 are provided with the second casing 11 and the first casing 12 sandwiched from the left and right directions. As shown in FIG. 3, a chute 12 </ b> A that is connected to the opened first tray 3 and serves as a sheet conveyance surface is formed on the upper surface of the first housing 12. The separation roller 15 is exposed from below at the front end of the chute 12A, and the lower surface (hereinafter referred to as contact surface) 21A of the separation pad 21 is in contact with the upper surface of the separation roller 15 (see FIG. 4). When sheets (not shown) such as documents are held on the first tray 3, the second tray 5, and the third tray 7 opened as described above, when the separation roller 15 is driven, the sheets are The sheet is conveyed forward one by one from the sheet in contact with the separation roller 15 through between the separation roller 15 and the separation pad 21. The separation pad 21 forms a separation pad group 20 together with the film 22 and the like. Further, the position of the conveyed sheet in the left-right direction is defined by a pair of guides 3 </ b> B provided on the first tray 3. The pair of guides 3B are interlocked symmetrically with respect to the center in the left-right direction via an interlocking mechanism 3C including a gear and a rack.

  A pair of upper and lower transport rollers 16 are disposed in front of the separation roller 15 inside the housing 10. A pair of upper and lower paper discharge rollers 17 are disposed at the front ends of the second housing 11 and the first housing 12. The sheet conveyed forward by the separation roller 15 is conveyed toward the paper discharge roller 17 through the conveyance roller 16, and is discharged to the outside of the housing 10 through the paper discharge roller 17. A pair of CIS (Contact Image Sensor) units 18 and 19 (an example of a reading unit) are provided above and below the sheet conveyance path from the conveyance roller 16 to the paper discharge roller 17 to read the image of the sheet from both above and below. ing. The upper CIS unit 18 is provided in the second casing 11, and the lower CIS unit 19 is provided in the first casing 12.

  As shown in FIG. 1, a display device 11 </ b> B that displays information is provided in the center of the upper surface 11 </ b> A of the second housing 11. Further, the display device 11B includes a touch panel that can be input by operation. The upper surface 11A and the display device 11B are slightly inclined forward rather than upward in the vertical direction. Therefore, the visibility and operability from the front of the image reading apparatus 1 can be improved. As shown in FIG. 2, when the first tray 3, the second tray 5, and the third tray 7 are closed, the opening 5B formed at the center of the second tray 5 is superimposed on the display device 11B. Therefore, even when the first tray 3, the second tray 5, and the third tray 7 are closed, the display device 11B exposed through the opening 5B can be viewed and operated.

[Support structure of separation pad]
FIG. 4 is a cross-sectional view illustrating a configuration in the vicinity of the separation roller 15 of the image reading apparatus 1. As shown in FIG. 4, the second housing 11 has a separation pad group 20 and a pair of document pressers 27 (on the left and right sides) disposed on the rear side of the bearing portion 11 </ b> F that receives the upper conveying roller 16. 9)). Hereinafter, the configuration of the support portion 30 will be described in detail.

  As shown in FIG. 4, the separation pad 21 is supported by the support unit 30 with the upstream side in the sheet conveyance direction, that is, the upper side as a base end. The contact surface 21 </ b> A is in contact with the separation roller 15 on the downstream side in the sheet conveyance direction, that is, the lower side, which is the front end side of the separation pad 21. A flat support surface 31 is formed as an example of the first contact portion on the rear lower surface of the support portion 30, and a bulging portion 32 in which the resin constituting the second housing 11 swells in both the upper and lower directions is formed at the rear end. Is formed. Furthermore, two protrusions 31A and 31B (see FIG. 9) are formed on the support surface 31. The separation pad set 20 is mounted on the support surface 31 by engaging the holes 20A and 20B (see FIG. 5) formed in the separation pad set 20 with the protrusions 31A and 31B. The holes 20A and 20B are formed through the separation pad 21.

  FIG. 5A is a perspective view illustrating the configuration of the separation pad set 20 in detail, and FIG. 5B is a plan view illustrating the configuration in detail. As shown in FIG. 5A, the separation pad 21 is formed in a flat plate shape having a rectangular shape in plan view by an elastic material (for example, cork-containing silicone rubber). The contact surface 21 </ b> A of the separation pad 21 imparts conveyance resistance to the sheet at a position facing the separation roller 15. A film 22 made of PET or the like is attached to the back side surface 21B on the back side of the contact surface 21A. The film 22 has a distal end portion 22A on the downstream side in the sheet conveying direction and an upstream proximal end portion 22B attached to the back side surface 21B, and an intermediate portion 22C between the distal end portion 22A and the proximal end portion 22B. It is bent and arranged so as to float from the back side surface 21B. Further, the base end portion 22B of the film 22 is stuck between the back end surface 21B of the separation pad 21 with the base end portion 23B of the elastomer sheet 23 interposed therebetween. The elastomer sheet 23 is made of, for example, an acrylic elastomer and extends along the back side surface 21B at the center in the left-right direction of the back side surface 21B, and the front end portion 23A is not restrained between the intermediate portion 22C and the back side surface 21B. Arranged. Further, an opening 22D for confirming the presence or absence of the elastomer sheet 23 is formed in the intermediate part 22C of the film 22 facing the tip part 23A of the elastomer sheet 23 in the manufacturing process or the like.

  The holes 20 </ b> A and 20 </ b> B are formed on the back surface 21 </ b> B of the separation pad 21 with the base end portion 23 </ b> B of the elastomer sheet 23 sandwiched between the base end portion 22 </ b> B of the film 22. The elastomer sheet 23 is attached to the back side surface 21B with a double-sided tape (not shown). Further, the hole 20B has a larger diameter than the hole 20A, and accordingly, the protrusion 31B that engages with the hole 20B has a larger diameter than the protrusion 31A that engages with the hole 20A (FIG. 9C). )reference). For this reason, it is suppressed that the hole 20A is erroneously engaged with the protrusion 31B, and as a result, the separation pad set 20 is suppressed from being attached to the support surface 31 upside down.

  Returning to FIG. 4, a pressing member 33 is provided as an example of the second contact portion at a position facing the separation roller 15, and a spring receiving portion 35 that receives a spring 34 attached to the pressing member 33 on the support portion 30. Is formed. The pressing member 33 is formed in a long shape extending in the entire left and right direction of the separation pad set 20 (see FIG. 9C), and receives the pressing force from the spring 34 to cause the separation pad set 20 to rotate about the rotation shaft of the separation roller 15. Press toward.

  The pair of document pressers 27 are disposed on both sides of the separation pad 21 in the left-right direction, and press the sheet against the separation roller 15 by contacting the separation roller 15. The pair of document holders 27 are connected to each other by a ground wire 28 so that static electricity generated by friction can be removed, and the wire 28 is fixed to the support portion 30 via a screw 29 from above. . A screw threaded portion 37 of the support portion 30 to which the screw 29 is screwed swells downward from the support portion 30 and contacts the film 22 when the separation pad set 20 is mounted. That is, the screw threaded portion 37 is an example of a third contact portion.

  Above the bulging portion 32, a protruding portion 38 that is connected to the rear end surface of the second housing 11 and contacts the upper surface 11A of the second housing 11 from below is disposed. A gap is formed between the protruding portion 38 and the bulging portion 32 so that a leaf spring 50 (more specifically, an upper tongue portion 50B to be described later: see FIG. 6C) can be inserted. Yes.

  FIG. 6A is a perspective view illustrating a configuration of a fixing member 60 in which a metal leaf spring 50 is mounted on a resin slider 40. FIG. 6B is a perspective view illustrating the configuration of the slider 40. Further, FIG. 6C is a perspective view showing the configuration of the leaf spring 50. As shown in FIG. 6B, the slider 40 includes a main body portion 41 disposed on the contact surface 21A side of the separation pad 21, a rear portion 42 disposed behind the bulging portion 32, and a main body portion thereof. 41 and a rear part 42 are provided with a pair of side plates 43 that support the left and right sides. The side plate 43 supports both the main body portion 41 and the rear portion 42 so that a gap is left between them.

  As shown in FIG. 6C, the leaf spring 50 includes a lower tongue portion 50 </ b> A that is inserted into the upper surface of the main body portion 41 through a space surrounded by the main body portion 41, the rear portion 42, and the pair of side plates 43. The upper tongue part 50B inserted into the back side of the support surface 31 in the support part 30 is provided. The lower tongue portion 50A and the upper tongue portion 50B are connected at their rear end portions via a connecting portion 50C that comes into contact with the rear end surface of the rear portion 42, and the leaf spring 50 is configured in a generally U shape as viewed from the side. Yes. The lower tongue portion 50A abuts on the upper surfaces of the plurality of ribs 41A formed on the upper surface of the main body portion 41 along the sheet conveying direction. The tip of the lower tongue 50A is bent downward (on the main body 41 side), and the base end of the bent portion is a contact portion 51 that contacts the separation pad 21 in front of the rib 41A. .

  At the tip of the upper tongue portion 50B, an engagement portion 52 is formed that is bent into a V shape on the lower tongue portion 50A side. As shown in FIG. 4, a recess 39 that engages with the engaging portion 52 when the leaf spring 50 is inserted forward is formed on the back side of the support surface 31 in the support portion 30. Further, the upper tongue portion 50B is formed with a restricting portion 53 that is cut and raised upward (in the direction opposite to the lower tongue portion 50A). The restricting portion 53 contacts the protruding portion 38 when the leaf spring 50 is removed rearward from the support portion 30.

  Further, as shown in FIGS. 6A to 6C, when the leaf spring 50 is mounted on the slider 40 and the connecting portion 50C comes into contact with the rear end surface of the rear portion 42, the leaf spring 50 is formed. The hook 44 formed on the main body 41 is engaged with the square hole 54. As a result, the leaf spring 50 is fixed to the slider 40.

  As shown in FIG. 7 and FIG. 8 as a cross-sectional view taken along line BB, the second housing 11 is swingably connected to the first housing 12. The second housing 11 is located at a position shifted to the downstream side in the sheet conveyance direction from the separation pad 21 and swings about a swing axis J extending in the left-right direction. For this reason, the second housing 11 has the separation pad 21 close to the separation roller 15 as shown in FIGS. 1 to 4 and the separation pad 21 from the separation roller 15 as shown in FIGS. It can be displaced between the separated positions.

  When the second housing 11 is disposed at the separated position, the separation pad set 20 and the fixing member 60 are exposed above the image reading apparatus 1 as shown in FIG. As easily as possible. Further, since the contact surface 21A of the separation pad 21 can be viewed from above at the separation position, the friction state of the contact surface 21A can be easily confirmed.

  That is, as shown in FIGS. 4 and 9A, when the fixing member 60 is pushed to the fixing position where the rear portion 42 of the slider 40 contacts the bulging portion 32, the engaging portion 52 engages with the recess 39. The fixing member 60 is stably held at the fixing position. That is, the fixing member 60 covers a part of the contact surface 21A of the separation pad 21. At this time, the contact portion 51 receives the restoring force of the leaf spring 50 and contacts the contact surface 21A of the separation pad 21 on the downstream side of the protrusions 31A and 31B in the sheet conveying direction. For this reason, when the fixing member 60 is disposed at the fixing position, the engagement between the protrusions 31A, 31B and the holes 20A, 20B cannot be released, and the separation pad set 20 is fixed to the support surface 31 satisfactorily.

  When the fixing member 60 is moved upward (upward in FIGS. 7 and 8, that is, upstream in the sheet conveying direction) from the state of FIG. 9A, the contact portion 51 contacts the contact surface 21 A of the separation pad 21. However, it moves along the contact surface 21A and does not contact the separation pad 21 as shown in FIG. 9B. When the fixing member 60 is disposed at the attachment / detachment position, the engagement between the protrusions 31 </ b> A, 31 </ b> B and the holes 20 </ b> A, 20 </ b> B can be released, and the separation pad set 20 can be attached / detached to / from the support surface 31. Further, when the fixing member 60 is disposed at the attachment / detachment position, the engaging member 52 is engaged with the bulging portion 32, whereby the fixing member 60 is held by the support portion 30. Further, when the restricting portion 53 comes into contact with the wall portion 38A of the protruding portion 38, the fixing member 60 is restricted from moving upward (upstream in the sheet conveying direction) (see FIG. 4). For this reason, it is possible to hold the fixing member 60 in the attach / detach position so that the fixing member 60 does not come off the support portion 30 when the separation pad is replaced.

  From the state where the fixing member 60 is disposed at the attachment / detachment position, the separation pad set 20 can be removed as shown in FIG. Then, the holes 20A and 20B of the new separation pad set 20 are engaged with the protrusions 31A and 31B as shown in FIG. 9B, and the fixing member 60 is disposed at the fixing position as shown in FIG. 9A. Then, the replacement of the separation pad group 20 is completed.

[Effects of this embodiment and its modifications]
As shown in FIG. 4, the film 22 of the separation pad set 20 attached to the support portion 30 has three contact portions in which a base end portion 22B, a tip end portion 22A, and an intermediate portion 22C are provided on the support portion 30, that is, The support surface 31, the pressing member 33, and the screw threaded portion 37 are in contact with each other. Further, the intermediate portion 22C of the film 22 with which the screw threaded portion 37 contacts is lifted from the back side surface 21B, and the film 22 does not behave integrally with the separation pad 21. For this reason, the film 22 acts as a damper between the support part 30 of the second housing 11 and the separation pad 21 to suppress the vibration of the separation pad 21, and to satisfactorily suppress the generation of abnormal noise during sheet conveyance. be able to. In addition, the leading end 22 </ b> A of the film 22 is pressed toward the rotating shaft of the separation roller 15 by the pressing member 33. For this reason, the vibration suppression effect with respect to the separation pad 21 by the film 22 becomes more remarkable, and generation | occurrence | production of the said unusual noise can be suppressed more favorably.

  In addition, this invention is not limited to the said embodiment at all, It can implement with a various form in the range which does not deviate from the summary of this invention. For example, as shown in FIGS. 5C and 5D, the elastomer sheet 23 may be omitted. However, when the separation pad set 20 shown in FIGS. 5A and 5B is used, the vibration of the unconstrained portion of the separation pad 21 can be suppressed also by the elastomer sheet 23, and the generation of the abnormal noise is suppressed. It can suppress more favorably. For example, according to the experimental results conducted by the applicant of the present application, the separation pad set 20 shown in FIGS. 5A and 5B can reduce abnormal noise by about 95%, and the separation pads shown in FIGS. 5C and 5D. In group 20, abnormal noise was reduced by about 90%.

  In the embodiment, the separation pad 21 and the film 22 have the same shape in plan view. However, the back side surface 21B of the separation pad 21 may be exposed. For example, as shown in FIGS. 5E and 5F, the back side surface 21B of the separation pad 21 may protrude from the outer periphery of the film 22 to the outside in the sheet conveying direction. And in that case, the three contact portions are the tip end portion 22A of the film 22, the tip end exposed portion 21C of the back side surface 21B protruding outside the base end portion 22B, the base end exposed portion 21D, and the intermediate portion 22C of the film 22. You may touch. Further, the back side surface 21B may protrude from only one of the front end portion 22A and the base end portion 22B of the film 22. Further, the holes 20 </ b> A and 20 </ b> B may be recesses that do not penetrate the separation pad 21. Furthermore, the sheet conveying apparatus of the present invention can be used in various apparatuses such as an image forming apparatus.

DESCRIPTION OF SYMBOLS 1 ... Image reading apparatus 11 ... 2nd housing | casing 12 ... 1st housing | casing 12A ... Chute 15 ... Separation roller 18, 19 ... CIS unit 20 ... Separation pad group 20A, 20B ... Hole 21 ... Separation pad 21A ... Contact surface 21B ... Back side 22 ... Films 22A, 23A ... Tip portion 22B, 23B ... Base end portion 22C ... Intermediate portion 23 ... Elastomer sheet 30 ... Support portion 31 ... Support surface 31A, 31B ... Projection 33 ... Pressing member 34 ... Spring 37 ... Screw Screw part 60 ... Fixing member J ... Oscillating shaft

Claims (8)

A first housing that rotatably supports a roller that conveys the sheet;
A second housing connected to the first housing;
A flat separation pad having a contact surface that is supported by the second housing and that imparts conveyance resistance to the sheet at a position facing the roller, and a back surface on the back side of the contact surface;
A film in which an upstream end portion and a downstream end portion in the sheet conveying direction are adhered to the back side surface, and an intermediate portion between the upstream end portion and the downstream end portion is bent so as to be lifted from the back side surface. When,
A first contact portion that is provided in the second housing and contacts the upstream end portion of the film or the back side surface of the separation pad that protrudes outside the upstream end portion;
A second contact portion that is provided in the second casing and contacts the back side surface of the separation pad that protrudes outside the downstream end portion or the downstream end portion of the film;
A third contact portion provided in the second housing and in contact with the intermediate portion of the film;
A sheet conveying apparatus comprising: The separation pad is supported by the second housing with the upstream side in the sheet conveying direction as a base end,
Of the both ends of the film, the end of the separation pad opposite to the base end is disposed at a position facing the outer peripheral surface of the roller across the separation pad, and the second contact portion The sheet conveying device according to claim 1, wherein the sheet conveying device is pressed toward the rotating shaft of the roller.   The second housing is connected to the first housing so that the separation pad is displaceable between a proximity position where the separation pad is close to the roller and a separation position where the separation pad is separated from the roller. The sheet conveying apparatus according to claim 1 or 2.   A swing shaft at a position shifted to either side of the sheet conveyance direction from the separation pad is provided, and the first housing and the second housing are swingably connected around the swing shaft. The sheet conveying apparatus according to claim 3, wherein the sheet conveying apparatus is provided. A sheet conveying device according to any one of claims 1 to 4,
A reading unit that reads an image of a sheet conveyed between the roller and the separation pad;
An image reading apparatus comprising: A separation pad set that is configured by a first casing and a second casing, and is attached to a sheet conveying device in which the first casing rotatably supports a sheet conveying roller,
The second housing is configured to be detachable, and has a contact surface that contacts the conveyed sheet and applies conveyance resistance to the sheet at a position facing the roller, and a back surface on the back side of the contact surface. A flat separation pad;
A film in which an upstream end and a downstream end in the sheet conveying direction are attached to the back side surface, and an intermediate portion between the upstream end portion and the downstream end portion is bent and disposed so as to be lifted from the back side surface; ,
Equipped with a,
When the separation pad is mounted on the second casing, the upstream side of the film or the back side surface of the separation pad that protrudes outside the upstream end is provided on the second casing. Contacting the first contact portion,
When the separation pad is attached to the second casing, the downstream end of the film or the back side surface of the separation pad that protrudes outside the downstream end is provided on the second casing. In contact with the second contact portion,
When the separation pad is mounted on the second housing, the intermediate portion of the film is in contact with a third contact portion provided on the second housing.
Separation pad set characterized by that. One end is sandwiched between one of the both end portions of the film and the back side surface of the separation pad, and the other end extends along the back side surface of the separation pad, and the other end is separated from the intermediate portion of the film. An elastomer sheet disposed unconstrained between the back side surface of the pad,
The separation pad set according to claim 6, further comprising: The separation pad set according to claim 6 or 7,
A first housing that rotatably supports a roller that conveys the sheet;
A second housing connected to the first housing;
The sheet conveying apparatus, wherein the separation pad group has the contact surface at a position facing the roller and is detachably supported by the second casing.

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