JP2016204145A - Sheet support device, and sheet conveyance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet support device providing an excellent operation feeling while suppressing the floating of guide parts, and a sheet conveyance device.SOLUTION: A sheet support device comprises a base part 51, a support part 53, and guide parts 55F, 55R. First hooks 71F, 71R and second hooks 72F, 72R are formed in the guide parts 55F, 55R. The guide parts 55F, 55R are attached to the support part 53 so as to be displaceable in a width direction of a sheet. When the support part 53 is not attached to the base part 51, the guide parts 55F, 55R can be attached and detached to and from the support part 53 by displacing the guide parts 55F, 55R to a second region. When the support part 53 is attached to the base part 51, the guide parts 55F, 55R cannot be displaced to the second region by being restricted by the base part 51.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a sheet supporting apparatus and a sheet conveying apparatus.

  An ADF (Automatic Document Feeder) provided in the image reading apparatus is provided with a sheet support device, and a sheet to be conveyed by the ADF is set on the sheet support device. This type of sheet support apparatus includes a support unit that supports a sheet conveyed downstream in the conveyance direction on a first surface, and a guide unit configured to be displaceable in the sheet width direction on the first surface of the support unit. (For example, refer to Patent Document 1).

  In the case of the sheet support apparatus described in Patent Document 1 below, a guide portion (original guide plate (2)) is disposed on the first surface (front surface) of the support portion (original document feed base (1)), and the support portion. A rack (rack (3)) is disposed on the second surface (back surface). A groove (guide hole (11)) is formed in the support portion, and the guide portion and the rack are coupled by a claw (21) through the groove.

Japanese Utility Model Publication No. 60-183735

  However, in the case of the sheet support device described in Patent Document 1, the connecting portion between the guide portion and the rack (that is, the portion where the claw (21) is located) is near the center of the guide portion in the sheet conveyance direction. For this reason, when the guide portion is operated and displaced in the sheet width direction, the end portion in the sheet conveyance direction of the guide portion is easily lifted from the support portion with the vicinity of the connection portion between the guide portion and the rack as a fulcrum. Therefore, when the guide unit is operated, the end of the guide unit on the downstream side in the sheet conveyance direction is likely to be lifted from the support unit, and the operational feeling is poor.

  In view of the circumstances as described above, it is desirable to provide a sheet support device and a sheet transport device that have a good feeling of operation by suppressing the lifting of the guide portion.

  The sheet support apparatus described below can support a base portion and a sheet conveyed downstream in the conveyance direction with a first surface, and the second surface on the opposite side of the first surface faces the base portion. A support portion attached to the support portion, and attached to the support portion, displaceable in the width direction of the sheet orthogonal to the sheet conveyance direction on the first surface, and on the edge in the width direction of the sheet supported by the support portion A first hook and a second hook provided at positions separated from each other in the sheet conveying direction. The first hook is a second hook. The guide unit is caught in the width direction of the sheet with respect to the support unit by being hooked on the support unit on the upstream side in the sheet conveyance direction and the second hook is hooked on the support unit on the downstream side in the sheet conveyance direction than the first hook. Displacement When the support portion is not attached to the base portion, the guide portion is a first range in which the first hook and the second hook are caught by the support portion, and the first hook and the second hook. In the second range where at least one is removed from the support part, the sheet can be displaced in the width direction of the sheet, and by displacing the guide part to the second range, the guide part can be attached to and detached from the support part. The guide portion is configured to be displaceable in the width direction of the seat in the first range and to be undisplaceable to the second range by being restricted by the base portion.

  According to the sheet support device configured as described above, the guide unit is attached to the support unit by the first hook and the second hook as described above being hooked on the support unit at positions separated from each other in the sheet conveying direction. It has been. Therefore, compared to the case where the guide part is attached to the support part at a position corresponding to either the first hook or the second hook, the guide part can be prevented from floating from the support part, and the operation feeling of the guide part is improved. can do.

  Further, when the support portion is not attached to the base portion, the guide portion can be attached to and detached from the support portion by displacing the guide portion to the second range as described above. On the other hand, when the support portion is attached to the base portion, the guide portion is restricted by the base portion and cannot be displaced to the second range. Therefore, even if a structure in which the guide portion can be easily attached to and detached from the support portion in the second range is adopted, if the support portion is attached to the base portion, the guide portion is not displaced to the second range, and the guide portion is When displacing in the width direction of the sheet, it is possible to appropriately suppress the guide portion from being detached from the support portion.

  A sheet conveying apparatus described below includes a main body, a conveying unit that is disposed in the main body, conveys the sheet to the downstream side in the conveying direction along a predetermined conveying path, and a base attached to the main body. And a sheet that is conveyed downstream in the conveyance direction by the conveyance unit can be supported on the first surface, and the second surface on the opposite side of the first surface is attached to the base unit with the second surface facing the base unit And a guide surface that is attached to the support portion and is displaceable in the width direction of the sheet perpendicular to the sheet conveyance direction on the first surface and capable of contacting the edge in the width direction of the sheet supported by the support portion. A first hook and a second hook provided at positions spaced apart from each other in the sheet conveyance direction. The first hook is upstream of the second hook in the sheet conveyance direction. Hook on the support on the side And the second hook is hooked to the support portion downstream of the first hook in the sheet conveyance direction, so that the guide portion is attached to the support portion so as to be displaceable in the sheet width direction, and the support portion is the base portion. When the guide portion is not attached to the support portion, the guide portion includes a first range in which the first hook and the second hook are hooked on the support portion, and a second range in which at least one of the first hook and the second hook is detached from the support portion. In this case, it is possible to displace in the width direction of the sheet, and by displacing the guide portion to the second range, the guide portion can be attached to and detached from the support portion, and when the support portion is attached to the base portion, the guide portion Is configured to be displaceable in the width direction of the sheet in the first range and to be incapable of displacement to the second range by being restricted by the base portion.

  According to the sheet conveying apparatus configured as described above, since the configuration equivalent to that of the above-described sheet supporting apparatus is provided, the operations and effects as described for the above-described sheet supporting apparatus are achieved. Therefore, the operation feeling of the guide part can be improved, and even when adopting a structure in which the guide part can be easily attached to and detached from the support part in the second range, when the guide part is displaced in the width direction of the sheet, It can suppress appropriately that a guide part remove | deviates from a support part.

FIG. 1 is a block diagram showing the configuration of the multifunction machine. FIG. 2 is a longitudinal sectional view of the reading unit. FIG. 3A is an explanatory view of the supply unit viewed from a direction perpendicular to the sheet conveyance direction. FIG. 3B is an explanatory view of the supply unit viewed from the opposite direction to FIG. FIG. 4A is an explanatory diagram of the base portion viewed from a direction perpendicular to the sheet conveyance direction. FIG. 4B is an explanatory view of the support portion viewed from a direction perpendicular to the sheet conveyance direction. FIG. 5A is an enlarged view of the VA portion shown in FIG. FIG. 5B is an enlarged view of the VB portion shown in FIG. FIG. 5C is an enlarged view of the VC portion shown in FIG. FIG. 5D is an enlarged view of the VD portion shown in FIG. FIG. 5E is a perspective view of the vicinity of the second hook in the guide portion at the front. FIG. 5F is a perspective view of the vicinity of the second hook in the rear guide portion. FIG. 5G is an enlarged view of the VG portion shown in FIG. FIG. 5H is an enlarged view of the VH portion shown in FIG. FIG. 6A is an explanatory diagram showing a state where the guide portion is in the first position. FIG. 6B is an explanatory diagram illustrating a state where the guide portion is in the second position. FIG. 6C is an explanatory diagram showing a state where the guide portion is in the third position. FIG. 7 is a perspective view showing a middle process when the guide part is attached to and detached from the support part. FIG. 8A is a plan view showing a main body portion of the ADF portion. FIG. 8B is a perspective view showing a contact portion and a contacted portion. FIG. 9A is an explanatory diagram illustrating the shape of the groove exemplified as a modification. FIG. 9B is a front view showing a part of the support portion and the guide portion exemplified as a modification. FIG. 10 is a perspective view showing a middle course when the guide portion exemplified as a modification is attached to and detached from the support portion.

Next, the sheet support device and the sheet conveyance device described above will be described with reference to exemplary embodiments.
[Configuration of MFP]
A multifunction device 1 illustrated in FIG. 1 includes a configuration corresponding to an example of the above-described sheet support device and sheet conveyance device. As shown in FIG. 1, the multifunction machine 1 includes a main body unit 2 and a reading unit 3. The reading unit 3 includes an FB unit 5 and an ADF unit 6 (corresponding to an example of a sheet conveying device in this specification). Details of the reading unit 3 will be described later.

  As shown in FIG. 1, the main unit 2 is provided with a control unit 11. The control unit 11 includes a known CPU 11A, ROM 11B, RAM 11C, NVRAM 11D, interface unit 11E, and the like. The CPU 11A executes a predetermined process according to a control program stored in the ROM 11B or the RAM 11C, and thereby controls each part of the multifunction device 1.

  As control objects by the control unit 11, an image forming unit 12, a LAN communication unit 13, an operation panel 14, a first image sensor 15, a second image sensor 16, a motor 17, a motor 18, a sheet detection sensor 19, and the like are provided. ing. Among these, the image forming unit 12, the LAN communication unit 13, and the operation panel 14 are provided in the main unit 2. The first image sensor 15 and the motor 17 are provided in the FB unit 5. The second image sensor 16, the motor 18, and the sheet detection sensor 19 are provided in the ADF unit 6.

  The image forming unit 12 is configured to be able to form an image on a recording medium by an inkjet method. More specifically, the image forming unit 12 includes a transport mechanism for transporting a recording medium, a recording head for ejecting ink, a drive mechanism for reciprocating the recording head, and the like. However, since these are known configurations, further explanation and illustration are omitted. The image forming unit 12 may be configured to be able to form an image on a recording medium by an electrophotographic method.

  The LAN communication unit 13 includes a communication interface device compatible with a wireless LAN and a communication interface device compatible with a wired LAN. The operation panel 14 is an input device (for example, a touch panel, various buttons, and switches) that is operated when the user gives various commands to the multifunction device 1, and an operation state of the multifunction device 1. Output device (for example, a liquid crystal display device and various lamps).

  In the present embodiment, the first image sensor 15 and the second image sensor 16 are both contact image sensors (CIS). The motor 18 is a power source for operating the first image sensor 15. The motor 18 is a power source for conveying the sheet in the ADF unit 6. The sheet detection sensor 19 is a sensor that detects that the leading end and the trailing end in the transport direction of the sheet transported by the ADF unit 6 have passed a predetermined detection position.

  As the sheet detection sensor 19, in the case of this embodiment, a contact type sensor that switches on and off depending on whether or not the sheet being conveyed is in contact is employed. However, whether or not to use a contact type sensor is arbitrary, and a sensor that can detect in a non-contact manner that the leading end or the trailing end in the transport direction of the sheet has passed a predetermined detection position may be used. For example, an optical sensor capable of detecting whether the sheet being conveyed is in a state of blocking the optical path, an optical sensor capable of detecting whether light is reflected by the sheet being conveyed, or the like can be used. .

[Details of reading unit]
In the reading unit 3, the ADF unit 6 includes a conveyance unit 20 that conveys a sheet along a predetermined conveyance path, as illustrated in FIG. 2. On the upstream side of the conveyance unit 20 in the conveyance direction, a supply unit 21 (corresponding to an example of a sheet support device in this specification) that supports a sheet supplied to the conveyance unit 20 is provided. A discharge unit 22 that supports the sheet discharged from the conveyance unit 20 is provided on the downstream side in the conveyance direction of the conveyance unit 20. An upper cover 24 that covers the transport unit 20 is disposed above the transport unit 20.

  The conveyance unit 20 includes a suction roller 25, a separation roller 26A, a separation piece 26B, a first conveyance roller 27A, a first pinch roller 27B, a second conveyance roller 28A, a second pinch roller 28B, a discharge roller 29A, and a discharge pinch roller 29B. Etc.

  The sheets placed on the supply unit 21 are sent from the supply unit 21 to the downstream side in the transport direction by the suction roller 25, and are separated one by one by the separation roller 26A and the separation piece 26B. Then, it is further transported downstream in the transport direction by the first transport roller 27A and the second transport roller 28A, and discharged onto the discharge unit 22 by the discharge roller 29A.

  A first ADF platen 31 is provided at a position along the transport path where the transport path is located at the lowest position, and a first ADF platen 31 across the transport path is located at the first position. A sheet pressing portion 33 is provided. The first sheet pressing portion 33 faces the first ADF platen 31 from above. In addition, a second ADF platen 32 is provided above the conveyance path extending obliquely downward from the second conveyance roller 28A toward the first ADF platen 31 at a position along the conveyance path, and sandwiches the conveyance path. At the position facing the second ADF platen 32, a second sheet pressing portion 34 is provided. The second sheet pressing portion 34 faces the second ADF platen 32 from obliquely below.

  Among these, the first ADF platen 31 is disposed in the FB portion 5, and the second ADF platen 32, the first sheet pressing portion 33, and the second sheet pressing portion 34 are disposed in the ADF portion 6. . In the present embodiment, the first ADF platen 31 and the second ADF platen 32 are configured by glass plates. The first sheet pressing part 33 and the second sheet pressing part 34 are metal members (sheet metal parts).

  The first sheet pressing portion 33 is urged toward the first ADF platen 31 by the spring 35, and presses the passing sheet toward the first ADF platen 31 while contacting the upper surface of the first ADF platen 31. However, the first sheet pressing portion 33 has convex portions (not shown) on the surface facing the first ADF platen 31 and at both ends in the front-rear direction referred to in the present embodiment. One ADF platen 31 is in contact. Therefore, a minute gap corresponding to the protrusion height of the convex portion described above is formed between the surface of the first sheet pressing portion 33 facing the first ADF platen 31 and the first ADF platen 31.

  When the sheet is conveyed between the first ADF platen 31 and the first sheet pressing portion 33, the first sheet pressing portion 33 moves the sheet to the first ADF platen within a range in which the above-described minute gap is maintained. Press toward 31. The spring 35 presses the first sheet pressing portion 33 toward the first ADF platen 31 with an urging force that does not hinder the conveyance of the sheet, thereby suppressing the sheet from floating from the first ADF platen 31.

  The second sheet pressing portion 34 is urged toward the second ADF platen 32 by the spring 36 and presses the passing sheet toward the second ADF platen 32 while contacting the lower surface of the second ADF platen 32. However, the second sheet pressing portion 34 also has convex portions (not shown) on the surface facing the second ADF platen 32 and at both ends in the front-rear direction referred to in the present embodiment. It is in contact with the two ADF platens 32. Therefore, a minute gap corresponding to the protrusion height of the above-described convex portion is formed between the surface of the second sheet pressing portion 34 facing the second ADF platen 32 and the second ADF platen 32.

  When the sheet is conveyed between the second ADF platen 32 and the second sheet pressing portion 34, the second sheet pressing portion 34 moves the sheet to the second ADF platen within a range in which the above-described minute gap is maintained. Press toward 32. The spring 36 presses the second sheet pressing portion 34 toward the second ADF platen 32 with an urging force that does not hinder the conveyance of the sheet, thereby suppressing the sheet from floating from the second ADF platen 32.

  The FB part 5 is provided with an FB platen 37, and the ADF part 6 is provided with a pressing part 38. In the case of this embodiment, the FB platen 37 is configured by a glass plate in the same manner as the first ADF platen 31 and the second ADF platen 32. The press part 38 is comprised by the laminated body of the foamed resin layer and the hard resin film layer. When the ADF unit 6 is closed, the pressing unit 38 comes into close contact with the upper surface of the FB platen 37 with some elastic deformation, and presses the reading object placed on the FB platen 37 toward the FB platen 37. To do.

  The second ADF platen 32 and the second sheet pressing portion 34 are arranged in an inclined state with respect to the upper surface of the FB platen 37 (that is, the support surface of the reading object). Therefore, the conveyance path that passes between the second ADF platen 32 and the second sheet pressing portion 34 is a path that is inclined from the upper left to the lower right in the present embodiment. Therefore, the horizontal length of the region occupied by the conveyance path is shorter than in the case where the conveyance path passing between the second ADF platen 32 and the second sheet pressing portion 34 is configured to extend horizontally. Therefore, the structure in the vicinity of the area occupied by the transport path can be reduced in size in the horizontal direction, and the area necessary for installing the multifunction device 1 can be reduced accordingly.

  The FB unit 5 is provided with a guide rail 41, a carriage 43, and the like. The guide rail 41 extends in the left-right direction as referred to in the present embodiment, in a state parallel to the lower surfaces of the first ADF platen 31 and the FB platen 37 in a range extending from the lower side of the first ADF platen 31 to the lower side of the FB platen 37. doing.

  The carriage 43 is attached to the upper portion of the guide rail 41, and is supported so as to be capable of reciprocating in the left-right direction along the guide rail 41. The carriage 43 is connected to a toothed belt (not shown), and reciprocates in the left-right direction following the circulation of the toothed belt by the power transmitted from the motor 17.

  The first image sensor 15 is mounted on the carriage 43 and reciprocates in the left-right direction together with the carriage 43. The second image sensor 16 does not move from a position facing the conveyance path across the second ADF platen 32. The plurality of reading elements included in the first image sensor 15 and the second image sensor 16 are arranged in the front-rear direction referred to in the present embodiment.

  When reading an image of a reading object (for example, a sheet or a book document) placed on the upper surface of the FB platen 37, the first image sensor 15 is orthogonal to the arrangement direction of the reading elements (main scanning direction). The image is read while moving together with the carriage 43 in the direction (sub-scanning direction). When reading an image of a sheet conveyed by the conveyance unit 20, the first image sensor 15 is stationary below the first sheet pressing unit 33 and the first ADF platen 31, and is placed on the upper surface of the first ADF platen 31. The image of the sheet passing while touching is read. The second image sensor 16 reads an image of a sheet passing through the second sheet pressing portion 34 and the second ADF platen 32 while being in contact with the upper surface of the second ADF platen 32.

[Details of supply section]
As shown in FIGS. 3A and 3B, the supply unit 21 includes a base 51, a support 53, and two guides 55F and 55R. As shown in FIG. 3A, FIG. 3B, and FIG. 4A, the base portion 51 is a main body portion 6A of the ADF portion 6 (see FIG. 2). 2), two leg portions 57F and 57R attached to the same, and a back plate portion 59 supported by the leg portions 57F and 57R.

  The support portion 53 has a first surface 531 (see FIGS. 3A and 4B) that is an upper surface in a state of being attached to the base portion 51 and a second surface 532 on the back side of the first surface 531. (See FIG. 3B). The support unit 53 is attached to the base unit 51 with the second surface 532 facing the base unit 51, and can support the sheet conveyed downstream in the conveyance direction by the conveyance unit 20 with the first surface 531. . When the support portion 53 is attached to the base portion 51, a part of the second surface 532 of the support portion 53 is covered with the back plate portion 59 of the base portion 51 as shown in FIG.

  As shown in FIGS. 3A, 3B, and 4B, grooves 61F and 61R are formed in the support portion 53. The groove portions 61F and 61R pass through between the first surface 531 and the second surface 532 in the support portion 53, and the through portions extend in the sheet width direction orthogonal to the sheet conveyance direction. ing. As shown in FIGS. 3A and 4B, the groove portion 61F includes a narrow width portion 611F in which the width direction dimension of the groove portion 61F, which is the same direction as the sheet conveyance direction, is the first dimension; The groove portion 61F has a wide portion 612F in which the dimension in the width direction is a second dimension wider than the first dimension. The groove portion 61R includes a narrow width portion 611R in which the dimension in the width direction of the groove portion 61R is the first dimension, and a wide width portion 612R in which the dimension in the width direction of the groove portion 61R is a second dimension wider than the first dimension. And have.

  As shown in FIG. 3A, the guide portion 55F has a guide surface 551F, and the guide portion 55R has a guide surface 551R. The guide surface 551F and the guide surface 551R are surfaces that extend upward with respect to the first surface 531 of the support portion 53. The two guide portions 55F and 55R are arranged with the guide surfaces 551F and 551R facing each other at a position along the first surface 531 of the support portion 53 with an interval in the width direction of the sheet. As shown in FIG. 3B, a rack 63F and a connecting portion 65F are integrally formed on the guide portion 55F. A rack 63R and a connecting portion 65R are integrally formed on the guide portion 55R.

  The connecting portion 65F is a portion that connects the guide portion 55F and the rack 63F, the guide portion 55F is disposed at a position along the first surface 531, the connecting portion 65F is passed through the groove portion 61F, and the rack 63F is the first portion. It is disposed at a position along the two surfaces 532. The connecting portion 65R is a portion that connects the guide portion 55R and the rack 63R, the guide portion 55R is disposed at a position along the first surface 531, the connecting portion 65R is passed through the groove portion 61R, and the rack 63R is the first portion. It is disposed at a position along the two surfaces 532. A pinion 67 is disposed on the second surface 532 of the support portion 53.

  As shown in FIGS. 5A, 5C, and 5E, a first hook 71F and a second hook 72F are formed on the guide portion 55F. As shown in FIGS. 5B, 5D, and 5F, the guide portion 55R is formed with a first hook 71R and a second hook 72R.

  The first hook 71F is located upstream of the second hook 72F in the sheet conveying direction, and is hooked on the second surface 532 of the support portion 53 at a location facing the groove 61F as shown in FIG. 5A. ing. The first hook 71R is located upstream of the second hook 72R in the sheet conveying direction, and is caught by the second surface 532 of the support portion 53 at a location facing the groove 61R as shown in FIG. 5B. ing.

  The second hook 72F is located downstream of the first hook 71F in the sheet conveying direction, and as shown in FIG. 5C, the second hook 72F is located at the downstream end of the supporting portion 53 in the sheet conveying direction. It is caught on two sides 532. The second hook 72R is located downstream of the first hook 71R in the sheet conveyance direction, and as shown in FIG. 5D, the second hook 72R is located at the downstream end of the support portion 53 in the sheet conveyance direction. It is caught on two sides 532.

  Further, as shown in FIG. 5E, the second hook 72F includes a base portion 721F protruding from the guide portion 55F, and a claw portion bent from the front end in the protruding direction of the base portion 721F and hooked on the second surface 532 of the support portion 53. 722F. The guide portion 55F is formed with a through hole 74F penetrating in the same direction as the protruding direction of the base portion 721F. When viewed from the penetration direction of the through hole 74F, the claw portion 722F is formed at a position overlapping the through hole 74F. As shown in FIG. 5F, the second hook 72R includes a base portion 721R protruding from the guide portion 55R, a claw portion 722R bent from the front end in the protruding direction of the base portion 721R, and hooked on the second surface 532 of the support portion 53. Have The guide portion 55R is formed with a through hole 74R penetrating in the same direction as the protruding direction of the base portion 721R. When viewed from the penetration direction of the through hole 74R, the claw portion 722R is formed at a position overlapping the through hole 74R.

  In a state in which the support portion 53 is attached to the base portion 51, the guide portions 55F and 55R have a first position where the distance between the guide surfaces 551F and 551R is the width W1 (see FIG. 6A). The distance between the guide surfaces 551F and 551R is displaced between the second position (see FIG. 6B) where the distance is the width W2.

  When displacing the guide portions 55F and 55R, if one of the guide portions (for example, the guide portion 55F) is displaced in the width direction of the sheet, one rack (for example, the rack 63F) that is displaced integrally with the guide portion. .) Rotates the pinion 67 meshing with the one rack. When the pinion 67 rotates, the other rack (for example, the rack 63R) meshing with the pinion 67 is displaced in the opposite direction to the one rack, and the other guide part (for example, the guide part 55R) displaced integrally with the other rack. .) Is also displaced in the opposite direction to the one guide portion.

  For this reason, the two guide portions 55F and 55R are displaced only by displacing one of the guide portions (for example, the guide portion 55F), so that both the guide portions 55F and 55R are displaced, and the distance between the guide surfaces 551F and 551R. Expands or contracts. When the sheet is supported by the support part 53, the guide parts 55F and 55R are displaced to a position where the guide surfaces 551F and 551R come into contact with the edge in the width direction of the sheet, so that the sheet is inclined with respect to the conveyance direction. Can be regulated.

  As shown in FIG. 5G, a rib 77 protruding toward the rack 63R is formed at a position opposite to the pinion 67 across the rack 63R. As shown in FIG. 5H, a rib 78 protruding toward the rack 63F is formed at a position opposite to the pinion 67 across the rack 63F.

  When the rack 63R is displaced in the sheet width direction without bending, there is a slight gap between the rib 77 and the rack 63R, so that the rack 63R and the rib 77 do not rub against each other. . Further, when the rack 63F is displaced in the sheet width direction without being bent, there is a slight gap between the rib 78 and the rack 63F, so that the rack 63F and the rib 78 do not rub against each other. ing.

  On the other hand, when the rack 63R is displaced in the width direction of the sheet and is bent in a direction away from the pinion 67, the rib 77 contacts the rack 63R at the leading end in the protruding direction. Thereby, the rib 77 suppresses further bending of the rack 63 </ b> R and suppresses disengagement between the rack 63 </ b> R and the pinion 67. When the rack 63F is displaced in the sheet width direction and bent in a direction away from the pinion 67, the rib 78 comes into contact with the rack 63F at the leading end in the protruding direction. Thereby, the rib 78 suppresses further bending of the rack 63F and suppresses disengagement between the rack 63F and the pinion 67.

  As shown in FIGS. 3A and 4A, the base portion 51 is provided with restricting portions 81F and 81R. In the state where the support portion 53 is attached to the base portion 51, the restriction portions 81F and 81R are located above the first surface 531 of the support portion 53 (in FIG. 3A, generally toward the front of the paper surface). It is arranged at the protruding position.

  Therefore, when the guide portion 55F is displaced to the second position (see FIG. 6B), the guide portion 55F comes into contact with the restricting portion 81F, and further displacement is restricted. Further, when the guide portion 55R is displaced to the second position, the guide portion 55R comes into contact with the restricting portion 81R, and further displacement is restricted.

  On the other hand, in a state where the support portion 53 is not attached to the base portion 51, the guide portion 55F does not contact the restricting portion 81F, and the guide portion 55R does not contact the restricting portion 81R. Therefore, the guide portions 55F and 55R can be displaced to the third position (see FIG. 6C) where the distance between the guide surfaces 551F and 551R is the width W3.

  When the guide portion 55F is displaced to the third position, the first hook 71F is displaced to a position where it overlaps with the wide portion 612F of the groove portion 61F, and the second hook 72F is displaced to a position away from the edge of the support portion 53. To do. Therefore, both the first hook 71F and the second hook 72F are not caught on the second surface 532 of the support portion 53, and the guide portion 55F can be detached from the support portion 53 at this position.

  Similarly, when the guide portion 55R is displaced to the third position, the first hook 71R is displaced to a position overlapping the wide portion 612R of the groove portion 61R, and the second hook 72R is disengaged from the edge of the support portion 53. Displace to position. Therefore, both the first hook 71R and the second hook 72R are not caught on the second surface 532 of the support portion 53, and the guide portion 55R can be detached from the support portion 53 at this position.

  When removing the guide portion 55R from the support portion 53, as shown in FIG. 7, the guide portion 55R is rotated about the vicinity of the connecting portion 65R. Thereby, the first hook 71R is pulled out from the groove 61R. The connecting portion 65R and the rack 63R can be pulled out from the groove portion 61R while appropriately adjusting the orientation of the connecting portion 65R and the rack 63R in the wide width portion 612R of the groove portion 61R. In addition, although illustration is abbreviate | omitted, the guide part 55F can also be removed from the support part 53 in the same procedure as the guide part 55R.

  Further, when attaching the guide portions 55F and 55R to the support portion 53, the work may be performed in a procedure reverse to the above-described series of procedures. Specifically, the connecting portions 65F and 65R and the racks 63F and 63R are inserted into the groove portions 61F and 61R while appropriately adjusting the directions of the connecting portions 65F and 65R and the racks 63F and 63R in the wide width portions 612F and 612R. Then, the first hooks 71F and 71R are introduced into the wide portions 612F and 612R by rotating the guide portions 55F and 55R with the vicinity of the coupling portions 65F and 65R as the rotation center, and the guide portions 55F and 55R are introduced into the above-described manner. Place in the third position.

  After that, if the guide portions 55F and 55R are displaced between the first position and the second position described above, the first hooks 71F and 71R are on the upstream side and the downstream side in the conveying direction across the narrow width portions 611F and 611R. The second hooks 72 </ b> F and 72 </ b> R are displaced to positions where they are hooked on the edge of the support portion 53. And if the support part 53 is attached with respect to the base part 51 in that state, it will be arrange | positioned in the position which the control parts 81F and 81R may contact | abut to the guide parts 55F and 55R. As a result, when the guide portions 55F and 55R are displaced to the second position, they abut against the restricting portions 81F and 81R, and the guide portions 55F and 55R are not displaced to the third position, so that the guide portions 55F and 55R are supported. It can be prevented from coming off from the portion 53. The range from the first position to the second position described above corresponds to an example of the first range referred to in this specification. The third position described above corresponds to an example of the second range referred to in this specification.

  As shown in FIGS. 3A and 4A, the base portion 51 is provided with blocking portions 83F and 83R. The closing portion 83F is disposed at a position overlapping the wide portion 612F of the groove portion 61F in a state where the support portion 53 is attached to the base portion 51. The blocking portion 83R is disposed at a position overlapping the wide portion 612R of the groove portion 61R in a state where the support portion 53 is attached to the base portion 51. As a result, the wide portions 612F and 612R are blocked by the blocking portions 83F and 83R, so that intrusion of foreign matter in the wide portions 612F and 612R can be suppressed.

  Further, a positioning contact portion 85 is provided on the second surface 532 of the support portion 53. The contact portion 85 is constituted by two wall surfaces facing each other with a predetermined interval. As shown in FIG. 8A, the body portion 6A of the ADF portion 6 is provided with a contacted portion 86 for positioning. The contacted portion 86 is a projecting object that fits between two wall surfaces of the contact portion 85 when the base portion 51 and the support portion 53 are attached to the main body portion 6A of the ADF portion 6. is there. The support portion 53 is directly positioned with respect to the main body portion 6A of the ADF portion 6 in the width direction of the sheet by the contact between the side surface of the contacted portion 86 and the wall surface of the contact portion 85.

[effect]
According to the multifunction machine 1 configured as described above, the first hooks 71F and 71R and the second hooks 72F and 72R as described above are hooked on the support unit 53 at positions separated from each other in the sheet conveying direction. The guide portions 55F and 55R are attached to the support portion 53. Therefore, compared with the case where the guide portion is attached to the support portion at a position corresponding to either the first hook or the second hook, the guide portions 55F and 55R can be suppressed from floating from the support portion 53, and the guide portions 55F, 55F, The operational feeling of 55R can be improved.

  When the support portion 53 is not attached to the base portion 51, when the guide portions 55F and 55R are displaced to the third position as described above (that is, the second range), the guide portions 55F and 55R are moved. It can be attached to and detached from the support portion 53. On the other hand, when the support portion 53 is attached to the base portion 51, the guide portions 55F and 55R are restricted by the restriction portions 81F and 81R included in the base portion 51 and cannot be displaced to the third position. Therefore, even if the structure in which the guide portions 55F and 55R can be easily attached to and detached from the support portion 53 in the third position is adopted, if the support portion 53 is attached to the base portion 51, the guide portions 55F and 55R are in the third position. Will not be displaced. Accordingly, when the guide portions 55F and 55R are displaced in the sheet width direction, it is possible to appropriately suppress the guide portions 55F and 55R from being detached from the support portion 53.

  In the case of the multifunction machine 1, when the guide parts 55F and 55R are attached to the support part 53, the racks 63F and 63R are inserted in the through-groove direction of the groove parts 61F and 61R, and then the connecting parts 65F and 65R. Is passed through the grooves 61F and 61R, and the guide portions 55F and 55R are arranged at the third position. Therefore, there is no need to provide an introduction port for introducing the connecting portions 65F and 65R into the groove portions 61F and 61R at the end portion of the support portion 53, and the rigidity of the support portion 53 is increased by the absence of such an introduction port. It can suppress that it falls.

  In the case of the multifunction machine 1, the second hook 72 </ b> F has a shape having the base portion 721 </ b> F and the claw portion 722 </ b> F as described above, and the through hole 74 </ b> F as described above is formed in the guide portion 55 </ b> F. The second hook 72R has a shape having the base portion 721R and the claw portion 722R as described above, and the through hole 74R as described above is formed in the guide portion 55R. Therefore, even if the claw portions 722F and 722R have an undercut shape when there is no through hole, they can be easily formed without using a slide core or the like, and the productivity of the guide portions 55F and 55R can be improved. .

  In the case of the multifunction machine 1, the main body 6 </ b> A of the ADF unit 6 in which the transport unit 20 is disposed and the support unit 53 are brought into direct contact using the contact part 85 and the contacted part 86. Can be positioned. Accordingly, the positional accuracy between the guide portions 55F and 55R and the transport portion 20 is improved as compared with the case where the positioning is performed between the main body portion 6A of the ADF portion 6 and the base portion 51. Therefore, it is possible to supply the sheet to the conveyance unit 20 with higher accuracy, and to prevent the sheet from being skewed.

  Further, in the case of the multifunction machine 1, the first hooks 71F and 71R are located from the lower surface (back surface) of the guide portions 55F and 55R at a position on the upstream side of the guide members 55F and 55R on the downstream side in the transport direction. It is formed to protrude. Therefore, the shape of the front end portion on the downstream side in the conveyance direction of the guide portions 55R and 55F can be formed in a shape extending straight in the front-rear direction. As a result, the shape of the leading end portion on the downstream side in the conveyance direction of the guide portions 55R and 55F can be cleared, and the sheet can be conveyed smoothly.

  Further, if the shape of the front end portion on the downstream side in the transport direction of the guide portions 55R and 55F is formed to extend straight in the front-rear direction, the front end portion on the downstream side in the transport direction of the guide members 55R and 55F and the main body portion 6A of the ADF portion 6 The seam with the upper surface can be made smooth, and the sheet conveying surface can be formed smoothly.

  Further, in the case of the multifunction machine 1, the configuration in which the first hooks 71 </ b> R and 71 </ b> F are hooked using the edge of the support part 53 is adopted, so that another groove for hooking the first hooks 71 </ b> R and 71 </ b> F is provided in the support part 53. The first surface 531 of the support portion 53 (sheet support surface) can be made clear, and the appearance can be improved.

[Supplement]
As described above, the sheet support device and the sheet conveyance device have been described with reference to exemplary embodiments. However, the above-described embodiments are merely illustrated as one aspect of the present invention. That is, the present invention is not limited to the exemplary embodiments described above, and can be implemented in various forms without departing from the technical idea of the present invention.

  For example, in the above embodiment, the groove portions 61F and 61R have a shape that does not reach the edge in the width direction of the support portion 53. However, as shown in FIGS. 9A and 9B, the groove portions 61F and 61R may have a shape in which one end in the extending direction reaches an end edge in the width direction of the support portion 53.

  In this case, the racks 63F and 63R and the connecting portions 65F and 65R can be introduced into the groove portions 61F and 61R from the edge in the width direction of the support portion 53. Therefore, when the guide portions 55F and 55R are attached to the support portion 53, as shown in FIG. 10, the racks 63F and 63R and the connection portions 65F and 65R are groove portions 61F and 61R from the edge of the support portion 53 in the width direction. The guide portions 55F and 55R can be arranged at the third position.

  Therefore, the shape of the grooves 61F and 61R need not be such that the racks 63F and 63R can pass as long as the grooves 65F and 65R can be introduced. Therefore, compared with the case where the racks 63F and 63R are passed through the groove portions 61F and 61R, the dimension in the width direction of the groove portions 61F and 61R can be reduced, and entry of foreign matter into the groove portions 61F and 61R can be suppressed.

  In the above-described embodiment, the reading unit 3 and the ADF unit 6 corresponding to the sheet conveying apparatus have been incorporated into the multifunction machine 1. However, in the case where the reading apparatus 3 is configured as a single-function image scanner apparatus, A configuration may be adopted.

As is clear from the exemplary embodiments described above, the sheet supporting device and the sheet conveying device described in this specification may further include the following configurations.
First, in the sheet supporting device and the sheet conveying device described in this specification, there are two guide portions, and the two guide portions are spaced apart in the width direction of the sheet at a position along the first surface. Each guide portion is disposed with the guide surfaces facing each other, and each guide portion is integrally formed with a rack disposed at a position along the second surface, and a connecting portion that connects the guide portion and the rack. Is formed between the first surface and the second surface, the groove portion is formed in a shape that extends in the width direction of the sheet, the connection portion is passed through the groove portion, A pinion that displaces the other rack in the opposite direction to the one rack when one of the racks is displaced by engaging with the two racks may be disposed on the second surface of the support portion. .

According to the sheet supporting apparatus configured as described above, the sheet conveyance direction can be regulated by the center register method.
Further, in the sheet supporting device and the sheet conveying device described in this specification, when the guide portion is attached to the supporting portion, the connecting portion is continuously passed through the groove portion after the rack is inserted in the penetration direction of the groove portion. By doing so, you may be comprised so that a guide part may be arrange | positioned in the 2nd range.

  According to the seat support device configured as described above, when the guide unit is attached to the support unit, after the rack is inserted in the penetration direction of the groove unit, the connecting unit is subsequently passed through the groove unit, and the guide unit Is arranged in the second range. Therefore, it is not necessary to provide an introduction port for introducing the connecting portion into the groove portion at the end of the groove portion, and the rigidity of the support portion can be prevented from being lowered by the amount that such an introduction port is not provided. .

  Further, in the sheet support device and the sheet conveying device described in the present specification, the groove portion includes a narrow width portion in which the width direction dimension of the groove portion that is the same direction as the sheet conveying direction is the first dimension, and the groove portion When the guide portion is attached to the support portion, the first hook is inserted into the groove portion in the penetration direction when the guide portion is attached to the support portion. The first hook may be configured such that when the first hook is displaced from the wide-width portion to the narrow-width portion, the first hook is caught by a portion forming the groove portion and cannot be removed from the groove portion.

  According to the seat support device configured as described above, when the first hook is introduced in the through direction of the groove portion in the wide portion as described above and the first hook is displaced from the wide portion to the narrow portion, the first hook is provided. Is caught in the part forming the groove and cannot be removed from the groove. Therefore, it is possible to suppress the first hook from coming off from the groove.

  Further, in the sheet supporting device and the sheet conveying device described in the present specification, the wide portion may be configured to be closed by the base portion when the supporting portion is attached to the base portion.

  According to the seat support device configured as described above, the wide portion is closed by the base portion when the support portion is attached to the base portion. Therefore, compared with the case where the wide portion is not blocked, it is possible to prevent the foreign matter that has entered the wide portion from entering further into the back than the groove portion.

  Further, in the sheet supporting device and the sheet conveying device described in the present specification, one end in the extending direction of the groove portion reaches the edge in the width direction of the supporting portion, and the connecting portion is connected to the edge in the width direction. It is configured to be able to be introduced into the groove part, and when the guide part is attached to the support part, the guide part is arranged in the second range by being introduced into the groove part from the edge in the width direction of the support part. It may be configured to be.

  According to the seat support device configured as described above, when the guide portion is attached to the support portion, the connecting portion is introduced into the groove portion from the edge in the width direction of the support portion, and the guide portion is within the second range. Be placed. Therefore, as long as the shape of the groove portion is such that the connecting portion can be introduced, it is not necessary to make the shape that the rack can pass through. It is possible to reduce the size and prevent foreign matter from entering the groove.

  Further, in the sheet supporting device and the sheet conveying device described in the present specification, ribs protruding toward the racks are formed at positions opposite to the pinions across the racks, and the racks are separated from the pinions. You may comprise so that it may contact | abut to a rack at the protrusion direction front-end | tip of a rib, when it bends in the direction to separate.

  According to the seat support device configured as described above, when the rack is bent in a direction away from the pinion, the engagement between the rack and the pinion is released by contacting the rack at the leading end of the rib in the protruding direction. Can be suppressed.

  Further, in the sheet supporting device and the sheet conveying device described in the present specification, the second hook includes a base portion that protrudes from the guide portion, and a claw that is bent from the tip in the protruding direction of the base portion and is hooked on the second surface of the supporting portion. The guide part is formed with a through hole penetrating in the same direction as the protruding direction of the base part, and the claw part is formed at a position overlapping the through hole when viewed from the through direction of the through hole. It may be.

  According to the seat support device configured as described above, the second hook has a shape having the base portion and the claw portion as described above, and the through hole as described above is formed in the guide portion. Therefore, even if it is a nail | claw part used as an undercut shape when there is no through-hole, it can shape | mold easily without using a slide core etc., and the productivity of a guide part can be improved.

  Further, in the sheet conveying apparatus described in the present specification, the support portion is brought into contact with a contacted portion for positioning provided in the main body portion, so that the relative position between the support portion and the main body portion is set in the sheet width direction. There may be provided a contact portion for positioning.

  According to the sheet conveying apparatus configured as described above, since the main body portion on which the conveying portion is disposed and the support portion can be directly brought into contact with each other, the positioning can be performed between the main body portion and the base portion. In comparison with this, the positional accuracy between the guide unit and the transport unit is improved. Therefore, it is possible to supply the sheet with higher accuracy to the conveyance unit, and it is possible to suppress the skew of the sheet from occurring.

  DESCRIPTION OF SYMBOLS 1 ... MFP, 2 ... Main unit, 3 ... Reading unit, 5 ... FB unit, 6 ... ADF unit, 6A ... Main unit, 11 ... Control unit, 11A ... CPU, 11B ... ROM, 11C ... RAM, 11D ... NVRAM , 11E: interface unit, 12: image forming unit, 13: LAN communication unit, 14: operation panel, 15: first image sensor, 16: second image sensor, 17: motor, 18: motor, 19: sheet detection sensor , 20 ... transport section, 21 ... supply section, 22 ... discharge section, 24 ... upper cover, 25 ... suction roller, 26A ... separation roller, 26B ... separation piece, 27A ... first transport roller, 27B ... first pinch roller, 28A ... second conveying roller, 28B ... second pinch roller, 29A ... discharge roller, 29B ... discharge pinch roller, 31 ... first ADF platen, 32 ... second ADF platen , 33 ... First sheet pressing part, 34 ... Second sheet pressing part, 35 ... Spring, 36 ... Spring, 37 ... FB platen, 38 ... Pressing part, 41 ... Guide rail, 43 ... Carriage, 51 ... Base part, 53 ... support part, 55F, 55R ... guide part, 57F, 57R ... leg part, 59 ... back plate part, 61F, 61R ... groove part, 63F, 63R ... rack, 65F, 65R ... coupling part, 67 ... pinion, 71F, 71R ... 1st hook, 72F, 72R ... 2nd hook, 74F, 74R ... Through hole, 77 ... Rib, 78 ... Rib, 81F, 81R ... Restriction part, 83F, 83R ... Closure part, 85 ... Contact part, 86 ... Place to be contacted, 531 ... first surface, 532 ... second surface, 551F ... guide surface, ... guide surface, 611F, 611R ... narrow portion, 612F, 612R ... wide portion, 721F, 721R ... base, 722F 722R ... claw portion.

Claims (10)

A base part;
A support portion that can support the sheet conveyed downstream in the conveyance direction with the first surface, and is attached to the base portion with the second surface opposite to the first surface facing the base portion;
A guide surface that is attached to the support portion and is displaceable in the width direction of the sheet perpendicular to the sheet conveyance direction on the first surface, and is capable of abutting against an edge in the width direction of the sheet supported by the support portion. A guide portion having
A first hook and a second hook provided at positions separated from each other in the sheet conveyance direction are formed on the guide portion, and the first hook is located upstream of the second hook in the sheet conveyance direction. The guide portion is caught in the width direction of the sheet with respect to the support portion by being hooked on the support portion, and the second hook is hooked on the support portion on the downstream side of the first hook in the sheet conveyance direction. Mounted displaceably,
When the support portion is not attached to the base portion, the guide portion includes a first range in which the first hook and the second hook are hooked on the support portion, and the first hook and the second hook. In the second range in which at least one of them is disengaged from the support portion, the sheet can be displaced in the width direction of the sheet, and the guide portion is displaced to the second range by detaching the guide portion from the support portion. Enabled,
When the support portion is attached to the base portion, the guide portion can be displaced in the width direction of the sheet in the first range, and is restricted by the base portion and cannot be displaced in the second range. A seat support device configured to be. The seat support device according to claim 1,
There are two guide portions, and the two guide portions are arranged with the guide surfaces facing each other with a gap in the width direction of the sheet at a position along the first surface.
Each guide part is integrally formed with a rack disposed at a position along the second surface, and a connecting part for connecting the guide part and the rack,
The support part is formed with a groove part that penetrates between the first surface and the second surface, and the penetration part extends in the width direction of the sheet. The connecting part is passed,
A pinion is disposed on the second surface of the support portion to engage the two racks so that when one of the racks is displaced, the other rack is displaced in a direction opposite to the one rack. Seat support device installed. The seat support device according to claim 2,
When the guide portion is attached to the support portion, the guide portion is inserted into the groove portion after the rack is inserted in the penetration direction of the groove portion, so that the guide portion is inserted into the second groove portion. A seat support device configured to be arranged in a range. The seat support device according to claim 3,
The groove portion has a narrow width portion in which the width direction dimension of the groove portion, which is the same direction as the conveyance direction of the sheet, is a first dimension, and a width direction dimension of the groove portion is wider than the first dimension. A wide portion having a second dimension, and when the guide portion is attached to the support portion, the first hook can be introduced in the through direction of the groove portion in the wide portion. A seat support device configured such that when the hook is displaced from the wide width portion to the narrow width portion, the first hook is caught by a portion forming the groove portion and cannot be removed from the groove portion. The seat support device according to claim 4,
The wide-width portion is configured to be closed by the base portion when the support portion is attached to the base portion. The seat support device according to claim 2,
One end of the groove part in the extending direction reaches the edge in the width direction of the support part, and is configured to be able to introduce the connecting part into the groove part from the edge in the width direction.
When the guide portion is attached to the support portion, the connecting portion is introduced from the end edge in the width direction of the support portion into the groove portion, so that the guide portion is disposed in the second range. A seat support device configured to be. The seat support device according to any one of claims 2 to 6,
Ribs that protrude toward the racks are formed at positions opposite to the pinions across the racks, and when the racks are bent away from the pinions, the leading ends of the ribs in the protruding direction A seat support device configured to abut on the rack. It is a sheet | seat support apparatus as described in any one of Claim 1- Claim 7, Comprising:
The second hook has a base portion protruding from the guide portion, and a claw portion bent from the protrusion direction tip of the base portion and hooked on the second surface of the support portion,
The guide portion is formed with a through hole penetrating in the same direction as the protruding direction of the base portion, and the claw portion is formed at a position overlapping the through hole when viewed from the through direction of the through hole. Sheet support device. The main body,
A transport unit that is disposed in the main body unit and transports the sheet downstream in the transport direction along a predetermined transport path;
A base part attached to the main body part;
A sheet that is transported downstream in the transport direction by the transport unit can be supported on the first surface, and a second surface that is opposite to the first surface is attached to the base unit with the second surface facing the base unit. And
A guide surface that is attached to the support portion and is displaceable in the width direction of the sheet perpendicular to the sheet conveyance direction on the first surface, and is capable of abutting against an edge in the width direction of the sheet supported by the support portion. A guide portion having
A first hook and a second hook provided at positions separated from each other in the sheet conveyance direction are formed on the guide portion, and the first hook is located upstream of the second hook in the sheet conveyance direction. The guide portion is caught in the width direction of the sheet with respect to the support portion by being hooked on the support portion, and the second hook is hooked on the support portion on the downstream side of the first hook in the sheet conveyance direction. Mounted displaceably,
When the support portion is not attached to the base portion, the guide portion includes a first range in which the first hook and the second hook are hooked on the support portion, and the first hook and the second hook. In the second range in which at least one of them is disengaged from the support portion, the sheet can be displaced in the width direction of the sheet, and the guide portion is displaced to the second range by detaching the guide portion from the support portion. Enabled,
When the support portion is attached to the base portion, the guide portion can be displaced in the width direction of the sheet in the first range, and is restricted by the base portion and cannot be displaced in the second range. A sheet conveying device configured to be. The sheet conveying device according to claim 9,
The support portion includes a contact portion that positions a relative position between the support portion and the main body portion in the width direction of the sheet by contacting a contacted portion for positioning provided on the main body portion. A sheet conveying device.