JP4196202B2 - Conveyance path opening / closing mechanism and image reading apparatus - Google Patents

Description

  The present invention relates to a processing apparatus for reading an image or other recorded content recorded on a read medium while conveying a recording medium (read medium) along the conveyance path or recording on the recording medium. The present invention relates to a transport path opening / closing mechanism that can easily take out a jammed medium to be read when the medium to be read is jammed.

  In order to increase the efficiency of check processing in banks and the like, attempts have been made to read information written on checks and process them online. For this reason, recently, the use of an image reading apparatus that reads an image by an image reading unit such as a scanner while conveying a foldable recording medium such as a check on a U-shaped conveyance path has been studied. . When a U-shaped conveyance path is used, the entrance and exit of the conveyance path can be adjacent to each other, so that an operator can easily insert a reading medium into the image reading apparatus without taking a seat. There is an advantage that you can. In addition, by using a U-shaped conveyance path, it is possible to increase the conveyance distance and allow the apparatus to be combined (by increasing the conveyance distance, a plurality of reading devices and printing apparatuses can be arranged in the conveyance path. The entire apparatus can be reduced in size.

  FIG. 10 is a perspective view illustrating an example of an image reading apparatus having a U-shaped conveyance path. The image reading apparatus 101 has a U-shaped conveyance path 103, and the conveyance path 103 is provided with an image reading area 104 in which an image reading unit such as a scanner is provided. When the read medium 90 is conveyed on the conveyance path 103 and passes through the image reading area 104, the image of the read medium 90 is read by the image reading unit. Although not shown, a conveyance roller that conveys the medium to be read 90 is installed in the conveyance path 103 with a predetermined interval corresponding to the length of the medium 90 to be read.

  The image reading unit used in the image reading apparatus 101 shown in FIG. 10 needs to read the entire range of the height (width) K of the read medium 90 having the maximum height among the read medium 90 to be conveyed. is there. Therefore, the height of the image reading unit is higher than the height K of the read medium 90. Further, it is necessary to provide a pressing device or a pressing roller that presses the read medium 90 against the reading surface of the image reading unit at a position facing the reading surface of the image reading unit. It becomes higher than the height K of 90. The height (width) k of the medium to be read indicates the height (width) of the medium to be read having the maximum width that can be read by the image reading apparatus.

  Therefore, as shown in FIG. 10, the image reading area 104 having the image reading unit and the pressing device on both sides of the conveyance path is higher than the medium 90 to be conveyed and covers the medium 90 to be read from both sides. It becomes. Therefore, if a paper jam occurs in the read medium 90 in the image reading area 104, it is difficult to remove the jammed portion because the inside cannot be accessed. In many cases, it is necessary to call a dedicated worker to disassemble the image reading area 104 and remove the jammed medium 90 to be read.

  Further, the conveyance roller that conveys the read medium 90 is nipped and conveyed by a feed roller (driving roller) and a pressing roller (pressing roller). Since this clamping force is relatively strong, it becomes difficult to take out the medium 90 to be read if the medium 90 to be read is pinched by the transport roller when a paper jam occurs. In addition, if the medium to be read sandwiched between the conveyance rollers is forcibly pulled out when the paper is jammed, the medium to be read may be damaged.

  Accordingly, an object of the present invention is to solve the above-described conventional problems, and easily access a jammed read medium without disassembling the image reading apparatus, and damage the read medium. It is another object of the present invention to provide a transport path opening / closing mechanism that can be easily removed.

  According to the present invention, when a paper jam occurs, a part of the conveyance path including the image reading unit can be opened and closed, and when a part of the conveyance path is opened, the elastic load of the presser roller is decreased to convey the conveyance path. The above object is achieved by using a mechanism that weakens the clamping force of the rollers.

The transport path opening / closing mechanism according to the first embodiment of the present invention is configured to transport while being guided by the transport walls on both sides so as to stand the read medium, and is provided in a transport path higher than the height of the recording medium, One or more image reading units that read information recorded on the read medium; a conveyance path opening / closing block that opens a part of the conveyance path in an installation region of the image reading unit of the conveyance path; and the conveyance Provided at a position different from the image reading unit in the path, and linked with the opening / closing operation of the transport path opening / closing block, and at least a pair of transport rollers that sandwich and rotate the read medium by a feed roller and a pressing roller. When the conveying path opening / closing block is in the closed position, an elastic load having a predetermined strength is applied to the pressing roller, and when the conveying path opening / closing block is opened, the pressing roller is elastically applied. The characterized in that it comprises a roller press block to reduce while keeping the holding state of the object to be read medium.

As a result, even when a paper jam occurs in the conveyance path higher than the read medium, the paper jam area can be easily accessed by opening the conveyance path opening / closing block. Also, by reducing the elastic load of the feed roller in conjunction with the opening operation of the open / close block, the holding force of the transport roller is weakened, so it is possible to easily remove paper jams without damaging the read medium. It becomes. Note that reducing the elastic load includes not only reducing the elastic load applied to the feed roller but also completely removing it.

  The conveyance path opening / closing mechanism according to another embodiment of the present invention is such that one end of the conveyance path opening / closing block is attached to the main body frame by a rotary joint, and the opening / closing block can be opened and closed by rotating about the rotary joint. Features. Since the conveyance path opening / closing block can be opened and closed in a hinge shape around the rotary joint, it is possible to easily open and close a part of the conveyance path without requiring skill.

  The conveyance path opening / closing mechanism according to another embodiment of the present invention is configured such that the conveyance path opening / closing block engages with the roller pressing block when the conveyance path opening / closing block is in the closed position, and is provided on the roller pressing block. A pressing engagement portion that presses the member against the feed roller and opens the roller pressing block when the conveyance path opening / closing block is opened is provided. In this aspect, the press engagement part provided in the conveyance path opening / closing block moves according to the opening / closing operation of the conveyance path opening / closing block. When the conveyance path opening / closing block is closed, the pressing engagement portion and the roller pressing block are engaged to press the elastic member in the roller pressing block, thereby applying an elastic load to the feed roller. When the conveyance path opening / closing block is opened, the pressing engagement portion is separated from the roller pressing block, and the pressing force applied to the elastic member applied by the pressing engagement portion is released. As a result, the elastic load applied to the feed roller is reduced.

  In the conveyance path opening / closing mechanism according to another embodiment of the present invention, the roller pressing block holds the pressing roller, the roller holding member is slidable in the feed roller direction, and the roller holding member is interposed via the elastic member. A pressing frame that can be pressed in the direction of the feeding roller, and the pressing engagement portion engages with the pressing frame when the conveyance path opening / closing block is in the closed position, and the roller holding member is fed through the elastic member to the feeding roller. It is characterized by pressing in the direction.

  According to this aspect, in the process in which the transport path opening / closing block is closed, the pressing engagement portion first contacts the pressing frame. Thereafter, by further closing to the closed position, the pressing engagement portion moves while pressing the pressing frame. Accordingly, the pressing frame further presses the roller holding member via the elastic member. When the roller holding member comes into contact with the feed roller and cannot move, the elastic member contracts according to the amount of movement of the pressing frame by the pressing engagement portion. Since a pressing force is applied to the roller holding member according to the amount of contraction of the elastic member, a constant pressing force is always applied to the roller holding member by moving the conveyance path opening / closing block to the closed position. . Therefore, the presser roller comes into contact with the feed roller with a constant pressing force, so that the transport roller can maintain a predetermined clamping force. When the conveyance path opening / closing block is opened, the pressing engagement portion moves away from the pressing frame. Therefore, the pressing force of the elastic member is gradually released and the clamping force is weakened. When the pressing engagement portion is completely separated from the pressing frame, the elastic member loses the pressing force and the clamping force is lost.

  The conveyance path opening / closing mechanism according to another embodiment of the present invention is characterized in that the pressing frame presses the plurality of roller holding members with one pressing frame. As described above, by pressing the plurality of roller holding members with the common pressing frame, the pressing amount of the pressing frame with respect to all the roller holding members becomes constant, and the plurality of pressing rollers can be pressed uniformly.

  A transport path opening / closing mechanism according to another embodiment of the present invention is characterized in that the pressing frame is slidably held by the main body frame, and the roller holding member is slidably held by the pressing frame. To do.

  In the transport path opening / closing mechanism according to another embodiment of the present invention, the roller holding member is slidably held by the main body frame, and the pressing frame is slidably held by the roller holding member. And

  A transport path opening / closing mechanism according to another embodiment of the present invention is characterized in that the roller holding member and the pressing frame are both slidably held by the main body frame.

  According to the image reading apparatus of the present invention, even when a paper jam occurs in the image reading area of the conveyance path, the conveyance path is opened by the opening / closing mechanism provided in the conveyance path, and this opening operation is performed. In conjunction with this, the pressing force of the conveying roller can be reduced, so that the jammed reading medium can be easily removed without being damaged.

When the opening / closing mechanism includes an opening / closing wall that rotates around a rotary joint and opens / closes, the conveyance path can be opened with a simple structure, and the operability and maintainability are excellent.
An image reading apparatus according to the present invention includes a conveyance path that conveys a medium to be read, an insertion section that communicates with the conveyance path, and that inserts the medium to be read, and the conveyance path opening / closing mechanism described above. To do.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
(Application example to image reading device)
FIG. 1 is a perspective view illustrating an appearance of an image reading apparatus 10 to which an opening / closing mechanism according to an embodiment of the present invention is applied. 2A is a plan view schematically showing the conveyance path of the image reading apparatus 10 in FIG. 1 and each part provided around the conveyance path, and FIG. 2B is a conveyance diagram of FIG. 2A. FIG. 3 is a cross-sectional view of the path 12 and a read medium (recording medium) taken along line AA ′.

  An image reading apparatus 10 shown in FIG. 1 includes an insertion unit 11 for inserting a recording medium 90 such as a check or a slip, a U-shaped conveyance path 12 for conveying the inserted recording medium 90, and a recording that has undergone processing such as reading. A discharge port 14 for discharging the medium 90 is provided. Further, the conveyance path 12 includes a conveyance path opening / closing block 30 that can open a part of the conveyance path 12.

  As shown in FIG. 2A, the image reading apparatus 10 of the present invention has a U-shaped conveyance path 12 that conveys a first first read medium 90 such as a check made of a foldable material. And a straight conveyance path 13 shown on the right side of FIG. The straight conveyance path 13 is a conveyance path for conveying various cards such as an ID card and a license made of a material that cannot be bent, and shares a part of the U-shaped conveyance path 12.

The image reading apparatus 10 includes two detection sensors 21, a conveyance roller 15, a magnet 23, a CIS (contact image sensor) and the like provided near the insertion portion 11 along the U-shaped conveyance path 12. Image reading units 24 and 26, pressing roller 25 and pressing device 27 for pressing a medium to be read to the image reading unit, conveying roller 16, MICR head (magnetic character reading head) 28 provided below conveying roller 16, Conveyance rollers 17, 18 and the like for guiding the medium toward the discharge port 14 are provided. The two image reading units 24 and 26 can read images on the front and back surfaces of a medium to be read (checks and the like), respectively. In FIG. 2 (a), only four pairs of transport rollers 15, 16, 17, and 18 are shown for the sake of simplicity of explanation, but a feed roller is provided near the insertion portion 11 and the read medium is inserted. It is also possible to adopt a configuration in which the is fed into the conveyance path. It is also possible to provide a printing device between the MICR head 28 and the discharge port 14 so as to perform front writing and end printing.
(U-shaped transport path and transport mechanism)
The U-shaped transport path 12 will be described in further detail. As shown in FIG. 2B, the U-shaped conveyance path 12 includes conveyance walls 12a and 12b that guide the medium to be read from both sides. Hereinafter, the conveyance path on the inner circumference side of the U-shaped conveyance path 12 is referred to as an inner conveyance wall 12a, and the conveyance path on the outer circumference side is referred to as an outer conveyance wall 12b. A conveyance space between the two conveyance walls is a conveyance path 12, and the read medium 90 is conveyed in the space (conveyance path).

  In the plan view shown in FIG. 2A, the read medium 90 is inserted from the insertion unit 11 into the transport path 12. The height of the inner conveyance wall 12a and the outer conveyance wall 12b in the conveyance path 12 near the insertion portion 11 and the discharge port 14 is lower than that of the medium to be read 90 (see FIG. 2B). Half is exposed from the transport path 12. Therefore, even if a paper jam occurs at this position, the read medium 90 can be removed from the conveyance path 12 relatively easily.

  When the reading medium 90 inserted from the insertion portion 11 is detected by the detector 21, the reading medium 90 is drawn into the U-shaped conveyance path 12 by a conveyance roller or a feed roller (not shown), and the conveyance rollers 15 to 18 is sequentially conveyed in the U-shaped conveyance path 12. These transport rollers 15 to 18 are constituted by drive rollers (feed rollers) 15a to 18a and press rollers 15b to 18b. Hereinafter, the relationship between the driving roller and the pressing roller using the conveying roller 15 will be described. The driving roller 15a is rotationally driven by a conveyance motor (not shown). The presser roller 15b is pressed by the drive roller 15a. Accordingly, the read medium 90 is conveyed in the rotation direction of the driving roller in the U-shaped conveying path 12 while being sandwiched between the driving roller 15a and the pressing roller 15b. The relationship between the driving roller 15a and the pressing roller 15b is common to all the conveying rollers 15-18.

  When the read medium 90 conveyed in the conveyance path 12 is detected by the detector 22 provided in front of the first image reading unit 24, the read medium 90 is first triggered by the detection signal. Each reading process is executed at the timing of passing through the image reading unit 24, the second image reading unit 26, and the MICR head 26.

  In this way, the read medium 90 passes through the two curved portions of the U-shaped transport path 12 so that the transport direction is changed by 180 degrees and is discharged from the discharge port 14 in the direction opposite to the insertion direction.

In the process of being conveyed along the conveyance path 12, the read medium 90 is read by the first and second image reading units 24 and 26 disposed in the conveyance path 12. In addition, a magnet 23 for magnetizing the magnetic ink characters is provided downstream of 15 for reading the magnetic ink characters printed on the lower part of a check or the like. The magnetized magnetic ink characters are read by the MICR head 28 disposed downstream of the image reading units 24 and 26.

As described above, the medium 90 to be read inserted from the insertion unit 11 into the U-shaped conveyance path 12 is conveyed on both sides by the first image reading unit 24 and the second image reading unit 26 while being conveyed. Is read. Further, the read medium having the magnetic ink characters is discharged from the discharge port 14 after the information of the magnetic ink is read by the MICR head 28 and the conveyance direction is changed by 180 degrees.
(Image reading)
Next, image reading will be described in more detail. The first image reading unit 24 is installed on the outer conveyance wall 12b side, and a pressing roller 25 is installed on the inner conveyance wall 12a side at the opposite position. The medium 90 to be read is pressed against the reading surface of the first image reading unit 24 by the pressing roller 25. As a result, when the read medium 90 passes through the first image reading unit 24, an image on one side of the read medium 90 is read.

  The second image reading unit 26 is installed on the inner conveyance wall 12 a side downstream (next to) the first image reading unit 24. A pressing device 27 is provided at a position facing the second image reading unit 26 across the conveyance path 12 (on the outer conveyance wall 12b side). A pressing roller 27 a is provided at the tip of the pressing device 27, and the read medium 90 passing through the transport path 12 is pressed against the reading surface of the second image reading unit 26 by the pressing roller 27 a. As a result, when the read medium 90 passes through the second image reading unit 26, the image on the other surface of the read medium 90 is read.

  Since the first image reading unit 24 and the second image reading unit 26 read the entire image of the medium 90 to be read, the reading surface of the first image reading unit 24 that forms the U-shaped conveyance path 12 at this position. The height of the reading surface of the second image reading unit 26, the inner conveyance wall 12a, and the outer conveyance wall 12b is higher than the height (width) K of the medium 90 to be read (see FIGS. 1 and 3). That is, in the portion where the first image reading unit 24 and the second image reading unit 26 are arranged, the medium 90 to be read is covered with both the inner conveyance wall 12a and the outer conveyance wall 12b. Therefore, when a paper jam occurs in the read medium 90 at this position, it is difficult to repair the paper jam in the transport path 12 because the inside of the transport path 12 cannot be accessed as it is. is there.

In the present invention, in order to solve this problem, an opening / closing mechanism capable of opening a part of the conveyance path is provided, and the clamping force of the conveyance roller adjacent to the opening / closing mechanism is weakened in conjunction with the opening / closing operation of the opening / closing mechanism. Thus, a mechanism is provided that can easily remove the medium 90 to be read.
(Straight conveyance path: second conveyance path)
The image reading apparatus according to the embodiment of the present invention can also read an image of a card (second read medium) such as a license or an ID card that cannot be bent.
An image of a card or the like is also read using the first and second image reading units 24 and 26 arranged in the U-shaped conveyance path 12. For this reason, a straight conveyance path 13 is provided for feeding the card to the position where the first and second image reading units 24 and 26 of the U-shaped conveyance path 12 are arranged.

The card is inserted into the straight conveyance path 13 from the card insertion slot 13a (see FIG. 3). When a detector (not shown) detects insertion of a card, the conveyance rollers including the linear conveyance roller 19 start to rotate. The linear conveying roller 19 is composed of a driving roller 19a and a pressing roller 19b to which the driving force of the driving motor is transmitted, like the other conveying rollers.

  The card is conveyed by the linear conveyance roller 19 and sent to the U-shaped conveyance path 12. Then, the paper is sandwiched between the transport rollers 16 and transported until the rear end of the card reaches a position where it is removed from the second image recording unit 26, and stops there. Thereafter, the card is conveyed in the reverse direction, and images on both sides are read when passing through the second image reading unit 26 and the first image reading unit 24, and are ejected from the inserted original position to the outside. .

As described above, the card introduced from the straight conveyance path 13 into the conveyance path 12 reads the image of the U-shaped conveyance path 12 where the first and second image reading units 24 and 26 are arranged in a straight line. The card image is read by being conveyed back and forth across the sections 24 and 26. When the image reading is completed, the card is discharged from the card insertion slot 13a via the straight conveyance path 13. In the present embodiment, the image reading devices 24 and 26 and a part of the conveyance path 12 are shared for reading the image on the card, thereby efficiently using the image reading apparatus. Since the height of the second read medium such as a card is smaller than the read medium 90 such as a check, only the upper half of the transport path 12 is used (the lower half may be used). ).
(Conveying path opening / closing mechanism)
In order to read the entire image of the medium to be read by the image reading units 24 and 26, as shown in FIG. 1, the conveyance path of the portion where the first image reading unit 24 and the second image reading unit 26 are arranged. The 12 inner transport walls 12a and the outer transport wall 12b have a structure that is higher than the height of the medium 90 to be read. Therefore, when a paper jam occurs in this, it is difficult to access the inside of the conveyance path 12 and take out the jammed paper. Therefore, in the present invention, an opening / closing mechanism is provided in this portion, and a part of the conveyance path 12 is opened so that a paper jam inside the conveyance path can be removed.

  The transport path opening / closing mechanism according to one embodiment of the present invention includes a transport path opening / closing block 30 that opens and closes a part of the transport path. The conveyance path opening / closing block 30 (hereinafter referred to as “opening / closing block 30”) can be opened in the direction of arrow B shown in FIG. Hereinafter, a transport path opening / closing mechanism according to an embodiment of the present invention and a transport roller opening mechanism for facilitating the removal of a paper jam in conjunction with this will be described with reference to FIGS.

  3 is a partial perspective view of the open / close block 30 as viewed from the direction of arrow C in FIG. 1, and FIG. 4 is a partial perspective view of the same state as in FIG. 3 as viewed from the direction of arrow D in FIG. It is. FIG. 5 is a perspective view showing the appearance of the roller pressing block 45 that weakens (opens) the clamping force of the conveying roller 16 in conjunction with the opening / closing operation of the opening / closing block 30, and the roller pressing block 45 is attached to the main body frame 40. It shows the state that has been. 6 is an exploded perspective view of the roller pressing block 45, and FIG. 7 is a perspective view of the roller pressing block 45 as viewed from the opposite side of FIG. FIG. 8 is a cross-sectional view of the roller pressing block 45 and shows a state when the opening / closing block 30 is closed. FIG. 9 is a cross-sectional view of the roller pressing block 45 and shows a state in the middle of the opening / closing block 30 being opened.

  As shown in FIGS. 3 and 4, in this embodiment, an opening / closing block 30 is provided on the outer conveyance wall 12 b side of the conveyance path 12. When a paper jam occurs, a part of the transport path 12 is released by opening the opening / closing block 30 outward.

  FIG. 3 shows a state where the opening / closing block 30 is rotated about 90 degrees outward and a part of the transport path 12 is opened. The opening / closing block 30 is provided with an opening / closing part frame 31 that constitutes a part of the outer conveyance wall 12 b, a first image reading part 24, and a pressing device 27 for the second image reading part 26. A rotary bearing portion 32 is provided below the opening / closing portion frame 31. The rotary bearing portion 32 is rotatably attached to a rotary shaft 41 fixed to the main body frame 40 of the image reading apparatus (the rotary shaft 41 and the rotary bearing portion 32 constitute a rotary joint). Accordingly, the opening / closing block 30 can be opened / closed by rotating around the rotation shaft 41. When the opening / closing block 30 is closed, the first image reading unit 24 is disposed so as to face the pressing roller 25, and the pressing roller 27 a of the pressing device 27 is disposed to face the second image reading unit 26.

  The opening / closing part frame 31 is provided with hooks 36a, 36b urged counterclockwise by a torsion spring or the like (not shown), and corresponding locking bars 47a, 47b (FIG. 5) when the opening / closing block 30 is closed. 3 (see FIG. 4). When opening, the lever 38 of the opening / closing block 30 is pulled up to remove the hooks 36a, 36b. As a result, the opening / closing block 30 can be rotated outward about the rotation shaft 41, and the conveyance path 12 is opened.

  The opening / closing block 30 of this embodiment is provided at the arrangement position of the first image reading unit 24 and the second image reading unit 26 in the transport path 12. Since this portion can be opened when a paper jam occurs, the paper jam can be eliminated without imposing unnecessary load on the image reading surface, so that the image reading surface can be prevented from being soiled or damaged.

In a state where the closing block 30 is opened, as the power supply of each device of the image reading device does not turn, it is also possible to provide interlocking.
(Conveying roller opening mechanism)
As described above, by opening a part of the transport path, it is possible to access the transport path that has been difficult to access in the past. However, even if a part of the transport path 12 is opened, the jammed read medium 90 may be held in a state of being sandwiched between transport rollers 16 provided downstream of the opening / closing block 30. . If the holding force of the conveying roller 16 is strong, it becomes difficult to take out the read medium 90 even if the opening / closing block 30 is opened. In such a case, if the medium 90 to be read sandwiched between the transport rollers 16 is pulled out with a strong force, the medium 90 to be read may be broken. Since the medium to be read is a financial security equivalent to a banknote such as a check, it is necessary to prevent damage.

  Therefore, in the present invention, a conveyance roller opening mechanism that releases the clamping force of the conveyance roller in conjunction with the opening operation of the opening / closing block 30 is provided. In this specification, “releasing the clamping force” includes both removing the clamping force completely and weakening the clamping force. In this embodiment, the holding force of the conveying roller 16 is released by weakening the pressing force of the pressing roller 16b against the driving roller 16a.

  As shown in FIG. 4, the opening / closing part frame 31 of the opening / closing block 30 includes a pressing engagement part 35 that engages with a roller pressing block 45 that releases the clamping force of the conveying roller 16. When the opening / closing part frame 31 of the opening / closing block 30 is closed, the pressing engagement part 35 engages with the pressing frame 50 of the roller pressing block 45 and presses the pressing frame 50 in the direction of the conveyance path 12 to a predetermined position. Move to. The pressing block 50 presses the pressing roller 16b via an elastic member 65 (see FIGS. 5 to 9). Therefore, when the opening / closing block 30 is closed, the pressing roller 16b is pressed against the driving roller 16a with a predetermined force, and the conveying roller 16 holds the read medium 90 with a predetermined holding force.

  When the opening / closing block 30 is opened, the pressing engagement portion 35 is separated from the pressing frame 50. As a result, the pressing force in the direction of the conveying path 12 against the pressing frame 50 is eliminated, the pressing force of the pressing roller 16b is released, and the clamping force of the conveying roller 16 is released.

  This will be described in more detail with reference to FIGS. 5 to 9 indicate the direction in which the pressing frame 50 moves when pressed by the pressing engagement portion 35 when the opening / closing block 30 is closed. FIG. 5 is a perspective view showing a state in which the roller pressing block 45 is attached to the main body frame 40, and FIG. 6 is a structure in which the pressing frame 50 and the roller holding member 60 constituting the roller pressing block 45 are attached to the main body frame 40. FIG. 6 is a perspective view of a state in which the roller holding member 60 and the pressing block 50 are combined as seen from the opposite side of FIG.

  As shown in FIG. 6, the main body frame 40 is provided with a support shaft 42 having a sliding pin 43 at the tip. The slide pin 43 of the support shaft 42 passes through the slide hole 51 of the pressing frame 50 and is then fixed by the clip 44 (see FIG. 5). That is, the pressing frame 50 is slidably attached to the sliding shaft 42 fixed to the main body frame 40. Thereby, the pressing frame 50 is slidable along the sliding hole 51.

  A roller holding member 60 is slidably attached to the pressing frame 50. At the front end of the roller holding member 60, a presser roller 16b is rotatably supported on the roller shaft 16c. The roller holding member 60 is provided for each pressing roller 16b. In the present embodiment, three roller holding members 60 corresponding to the pressing roller 16 b are attached to the pressing frame 50.

  The roller holding member 60 is provided with first sliding pieces 61 a and 61 b and a second sliding piece 62. The first sliding pieces 61 a and 61 b are attached so as to penetrate the opening 52 of the pressing frame 50 and engage with the first sliding surface 53. The second sliding piece 62 is attached so as to penetrate the through hole 54 and engage with the second sliding surface 55. Therefore, the roller holding member 60 is supported by the first sliding surface 53 and the second sliding surface 55 of the pressing block 50 and can slide on the sliding surfaces 53 and 55. A coil spring 65 is mounted between the pressing frame 50 and the roller holding member 60 (in the opening 64).

  FIG. 7 is a perspective view of the state in which the pressing frame 50 and the roller holding member 60 are combined as seen from the back side of the pressing frame 50. A coil spring 65 is mounted, the leading end 65a of the coil spring is in contact with the roller holding member 60, and the rear end 65b is in contact with the spring pressing piece 56 protruding from the pressing frame 50 to the back side. The pressing frame 50 can slide along the sliding hole 51 while being supported by the sliding pin 43 (see FIGS. 5 and 6), and moves along the sliding hole 51 by the opening / closing operation of the opening / closing block 30. . FIG. 7 shows a state in which the opening / closing block 30 is opened, that is, a state in which the pressing frame 50 is opened and the coil spring 65 is extended so that the holding force of the conveying roller 16 is released. When the opening / closing block 30 is closed, the pressing engagement portion 35 and the pressing frame 50 are engaged, and the pressing frame 50 is pressed by the pressing engagement portion 35 and moved to a predetermined position (FIGS. 4, 8). (See FIG. 9).

  When the opening / closing block 30 is closed, when the pressing frame 60 slides in the direction of the conveyance path 12 by the pressing engagement portion 35, the spring pressing piece 56 moves in the direction of the pressing roller 16b, and the rear end 65b of the coil spring 65 is reached. Press. The coil spring 65 whose rear end 65b is pressed presses the roller holding member 60 with its front end 65a. Accordingly, the roller holding member 60 supported by the first and second sliding pieces 61.62 slides on the first and second sliding surfaces 53 and 55 of the pressing frame 50. When the pressing roller 16b comes into contact with the driving roller 16a, the roller holding member 60 cannot move. Therefore, the coil spring 65 is compressed by the spring pressing piece 56 as the pressing frame 50 slides. When the opening / closing block 30 is completely closed and the pressing engagement portion 35 moves to a predetermined closed position, the coil spring 65 is compressed by a predetermined amount. As a result, the pressing roller 16b is pressed against the driving roller 16a with a predetermined pressing force, and the conveying roller secures a predetermined clamping force.

  The clamping force of the conveyance roller 16 will be described in more detail with reference to FIGS. FIG. 8 is a cross-sectional view showing a state in which the opening / closing block 30 is closed. In this state, the pressing engagement portion 35 of the opening / closing block 30 is engaged with the pressing frame of the roller pressing block 45. Since the pressing frame compresses and compresses the coil spring 45 by the spring pressing piece 56, the pressing frame is urged to the right in FIG. 8 by the coil spring 65. However, since the pressing frame 50 is locked in the rightward movement by the pressing engagement portion 35, it cannot move in the rightward direction. Accordingly, due to the reaction, the pressing force of the coil spring 65 is applied to the roller holding member 60 via the coil spring tip 65a. Since the roller holding member 60 is slidably held by the pressing frame 50, it is urged to the left. At the tip of the roller holding member 60, a presser roller 16b is pivotally supported by the rotating shaft 16c and is pressed by a feed roller (drive roller). As a result, a clamping force corresponding to the elastic force of the coil spring 65 is generated between the feed roller 16a and the pressing roller 16b. Note that, when the open / close block 30 is closed, the pressing engagement portion 35 is always in the same position, so that the transport roller 16 can always maintain a constant clamping force.

  FIG. 9 is a cross-sectional view of the roller pressing block showing a state where the opening / closing block 30 is slightly opened. When the opening / closing block 30 is opened, the pressing engagement portion 35 moves in the right direction. On the other hand, as described in FIGS. 5 and 6, the pressing frame 50 is slidable left and right. Accordingly, when the pressing engagement portion 35 moves in the right direction, the pressing frame 50 also moves in the right direction by the elastic force of the coil spring 65. As a result, the coil spring 65 extends and the elastic force becomes weak. Therefore, due to the reaction, the pressing force of the pressing roller 16b against the feeding roller 16a is also weakened, and the holding force of the conveying roller 16 is weakened. It is possible to determine how much the holding force of the conveying roller 16 is weakened by opening the opening / closing block 30 depending on how much the slidable range of the pressing frame 50 is set. That is, when the pressing engagement portion 35 is completely separated from the pressing frame 50, the clamping force is weaker as the distance that the pressing frame 50 can move in the right direction (the length that the coil spring 65 can extend) is longer. . The sliding range of the pressing frame 50 can be defined by the length of the sliding groove 51. By making the pressing frame 65 slidably movable beyond the free length of the coil spring 65, it is possible to completely remove the clamping force. In general, it is desirable not to completely remove the pinching force but to leave the weak pinching force and hold the read medium lightly.

  When the opening / closing block 30 is thus opened, the pressing engagement portion 35 moves rightward, and the pressing frame 50 moves rightward by the elastic force of the coil spring 65. As a result, the coil spring 65 is extended, the pressing force of the pressing roller 16b is weakened, and the holding force of the conveying roller 16 is released. Therefore, even when the medium 90 to be read is nipped by the conveyance roller 16 when a paper jam occurs, the nipping force of the conveyance roller 16 can be released by opening the opening / closing block 30, and the jam is easily removed. It becomes possible to do.

In the above description, only the coil spring 65 is shown as an elastic member that presses the pressing roller 16b against the drive roller 16a. However, a torsion spring, a leaf spring, or other elastic members can be used as the elastic member.
(Other embodiments)
In the above-described embodiment, the opening / closing mechanism of the present invention shows the conveyance path opening / closing mechanism of the image reading apparatus that includes two image reading units and reads the image data on both sides of the medium to be read. The opening / closing mechanism of the present invention can be applied even when only one part is provided and only one side is read, and can also be applied when three or more image reading parts are provided.

  In the above-described embodiment, the MICR is installed. However, the present invention can also be applied to a case where the MICR is not installed. Further, the present invention can be applied to a case where a print head is provided and printing is performed on a reading medium.

  Furthermore, in the above-described embodiment, the straight conveyance path is provided in addition to the U-shaped conveyance path, but the present invention can also be applied to the case where only the U-shaped conveyance path is provided.

  Further, in the above-described embodiment, the scanner is installed in the conveyance path sandwiched between the two curved portions of the U-shaped conveyance path. However, the present invention can be similarly applied when installed in other places. It is.

  Furthermore, the embodiment of the present invention is not limited to the above-described embodiment, and in addition to releasing the clamping force of the conveyance roller adjacent to the open portion in conjunction with a mechanism for opening a part of the conveyance path. Various embodiments can be taken.

1 is a perspective view illustrating an appearance of a reading apparatus to which an opening / closing mechanism according to an embodiment of the present invention is applied. 2A is a plan view schematically showing the conveyance path of the image reading apparatus 10 in FIG. 1 and each part provided in the periphery of the conveyance path, and FIG. 2B is a plan view showing the conveyance path 12 of FIG. It is sectional drawing of the AA 'line direction of a reading medium (recording medium). It is a fragmentary perspective view from the arrow C direction of FIG. 1 which shows the state which opened the opening / closing mechanism. It is the fragmentary perspective view seen from the arrow D direction of FIG. 1 of the same state as FIG. It is a perspective view which shows the external appearance of the roller press block which shows the state in which the roller press block is attached to the flame | frame. It is a disassembled perspective view of a roller press block. It is the perspective view which looked at the state which combined the press frame and the roller holding member from the back side of the press frame. It is sectional drawing which shows the relationship between the roller press block of a state with the conveyance path opening / closing block closed, and a press engagement part. It is sectional drawing which shows the relationship between a roller press block and a press engagement part when a conveyance path opening / closing block is open | released. It is a perspective view which shows an example of the image reading apparatus which has the conventional U-shaped conveyance path.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image reader 11 Insertion part 12 U-shaped conveyance path 12a Outer conveyance wall 12b Inner conveyance wall 12c Conveyance space 13 Straight conveyance path 14 Outlet 15, 16, 17, 18, 19 Conveyance roller 15a, 16a, 17a, 18a, 19a Feed roller (drive roller)
15b, 16b, 17b, 18b, 19b Pressing roller (pressing roller)
DESCRIPTION OF SYMBOLS 21 Detection sensor 22 Detector 23 MICR magnetizing head 24 1st image reading part 25 Pressing roller 26 2nd image reading part 27 Pressing device 27a Pressing roller 28 MICR head 30 Conveyance path opening / closing block 31 Opening / closing part frame 32 Rotating bearing part 33 35 Press engaging portion 36 Hook 38 Lever 40 Main body frame 41 Rotating shaft 42 Support shaft 43 Slide pin 44 Clip 45 Roller press block 47 Locking bar 50 Press frame 51 Slide hole 52 Open 53 First slide surface 54 Through Hole 55 Second sliding surface 56 Spring pressing piece 56
60 Roller holding member 60 61a, 61b First sliding piece 62 Second sliding piece 64 Opening 65 Coil spring 65a Spring tip 65b Spring rear end

Claims (9)

One or more images which are conveyed while being guided by conveyance walls on both sides so as to stand the medium to be read and are provided in a conveyance path higher than the height of the medium to be recorded, and read information recorded on the medium to be read A reading unit;
A transport path opening / closing block that opens a part of the transport path in an installation region of the image reading unit in the transport path;
At least a pair of transport rollers provided at a position different from the image reading unit in the transport path and transporting the read medium while being nipped and rotated by a feed roller and a press roller;
In conjunction with the opening / closing operation of the transport path opening / closing block, when the transport path opening / closing block is in a closed position, an elastic load having a predetermined strength is applied to the press roller, and when the transport path opening / closing block is opened, A conveyance path opening / closing mechanism comprising: a roller pressing block that reduces an elastic load of the pressing roller while maintaining the held state of the medium to be read .   2. The transport path opening / closing mechanism according to claim 1, wherein one end of the transport path opening / closing block is attached to a main body frame by a rotary joint, and can be opened and closed by rotating about the rotary joint.   The transport path opening / closing block engages with the roller pressing block and presses an elastic member provided on the roller pressing block against the feed roller when the transport path opening / closing block is in a closed position, and The transport path opening / closing mechanism according to claim 1, further comprising a pressing engagement portion that opens the roller pressing block when the path opening / closing block is opened. The roller pressing block holds the pressing roller, and a roller holding member that can slide in the feed roller direction, and a press frame that can press the roller holding member in the feed roller direction via the elastic member. And
The pressing engagement portion engages with the pressing frame when the conveyance path opening / closing block is in a closed position, and presses the roller holding member toward the feed roller via the elastic member. The conveyance path opening and closing mechanism according to claim 3.   The transport path opening / closing mechanism according to claim 4, wherein the pressing frame presses the plurality of roller holding members with a single pressing frame.   6. The conveyance path opening and closing according to claim 4, wherein the pressing frame is slidably held by a main body frame, and the roller holding member is slidably held by the pressing frame. mechanism.   The conveyance path according to claim 4 or 5, wherein the roller holding member is slidably held by a main body frame, and the pressing frame is slidably held by the roller holding member. Opening and closing mechanism.   The conveyance path opening / closing mechanism according to claim 4 or 5, wherein both the roller holding member and the pressing frame are independently slidably held by the main body frame. A transport path for transporting the read medium;
An insertion portion that communicates with the transport path and inserts the read medium;
An image reading apparatus comprising the transport path opening / closing mechanism according to claim 1.

Images