Patent Publication Number: US-9415965-B2

Title: Media conveying device and media processing device

Description:
TECHNICAL FIELD 
     The present invention relates to a media conveying device and a media processing device, and is suitable for application to, for example, a bank note processing device in which media such as cash or the like are inserted and that carries out a desired transaction, or the like. 
     BACKGROUND ART 
     Conventionally, at bank note processing devices and the like that are used in financial institutions or the like, for example, a client deposits cash such as bank notes or coins or the like, or cash is dispensed to the client, in accordance with the contents of the transaction with the client. 
     There are bank note processing devices that have, for example, a bank note deposit/withdrawal opening that carries out the transfer of bank notes to and from clients, a discriminating section that discriminates the denomination and the authenticity of an inserted bank note, a temporary holding section that temporarily holds inserted bank notes, and denomination cassettes that store bank notes per denomination. 
     This bank note processing device conveys bank notes by connecting the respective sections, that are the bank note deposit/withdrawal opening, the discriminating section, the temporary holding section, the denomination cassettes and the like, by a conveying path that is provided at the interior of a housing (see, for example, Japanese Patent Application Laid-Open (JP-A) No. 2010-186448). 
     A roller conveying section  220 , that conveys bank notes by the mechanisms shown in  FIG. 18  to  FIG. 21 , is used as a portion of the conveying path in such a bank note processing device. 
       FIG. 18  shows the roller conveying section  220  seen from the right side of a frame right side plate  19 R, and  FIG. 19  shows the roller conveying section  220  seen from the right side through the frame right side plate  19 R, an upper guide right side plate  44 R and a lower guide right side plate  46 R. In  FIG. 19 , the frame right side plate  19 R and the upper guide right side plate  44 R are shown virtually by the two-dot chain lines. 
       FIG. 20  shows the roller conveying section  220  seen from the front side of an upper guide front side plate  44 F and a lower guide front side plate  46 F.  FIG. 21  shows the roller conveying section  220  seen from the front side through the upper guide front side plate  44 F and the lower guide front side plate  46 F. 
     At this roller conveying section  220 , an upper conveying unit  262  in which plural mechanism parts are combined is made into a sub-assembly. The roller conveying section  220  is assembled due to this upper conveying unit  262  that has been assembled in advance being fit into a frame  19 . 
     The frame right side plate  19 R and a frame left side plate  19 L, that are plate-shaped and are formed of metal, extend along the vertical direction at the left and right end portions of the roller conveying section  220 . Hereinafter, the frame right side plate  19 R and the frame left side plate  19 L are also collectively called the frame  19 . 
     An outer side metal plate  16  that covers the upper conveying unit  262  from above is mounted to the frame  19 . The outer side metal plate  16  is structured by a metal plate, and is bent downward at the four corners of a shape that is rectangular as seen in plan view and extends in the horizontal direction, and is electrically conductive with the frame  19  by being fixed to the frame  19 . 
     An inner side metal plate  17  that is structured by a metal plate is provided beneath the outer side metal plate  16 . At this inner side metal plate  17 , the left and right end portions of an inner side metal plate ceiling plate  17 J that extends in the horizontal direction are bent downward substantially orthogonally, and structure an inner side metal plate right side plate  17 R and an inner side metal plate left side plate  17 L. 
     Due to the inner side metal plate ceiling plate  17 U being fixed to the outer side metal plate  16 , this inner side metal plate  17  is electrically conductive with the outer side metal plate  16  and holds an upper conveying guide  44 . 
     A bank note conveying path  48 , at which bank notes are conveyed with the upper side and lower side thereof being guided respectively by the upper conveying guide  44  and a lower conveying guide  46  that are plate-shaped and whose left and right end portions are held at the frame  19 , is formed at this roller conveying section  220 . 
     It is easy to see the interior of the bank note conveying path  48  from the exterior due to this upper conveying guide  44  being resin-molded and formed to be transparent. 
     The roller conveying section  220  has drive rollers  26  that are provided so as to rotate freely, and pushing rollers  30  that are formed of metal and push the bank notes against the drive rollers  26  in a direction orthogonal to the surface direction that is the direction in which the surfaces of the bank notes extend. 
     The pushing rollers  30  rotate around pushing shafts  32  that are made of metal, and are electrically conductive with the inner side metal plate  17  due to these pushing shafts  32  being slidably inserted and fit into pushing shaft hole portions  76  that are formed in the inner side metal plate right side plate  17 R and the inner side metal plate left side plate  17 L. 
     The pushing shafts  32  are urged downward by a pushing spring  38  that is made of metal. This pushing spring  38  is supported by a supporting point shaft  236 . 
     The supporting point shaft  236  is cylindrical, is formed of metal, and extends in the left-right direction. The supporting point shaft  236  is electrically conductive with the inner side metal plate  17  by being fit into and fixed to supporting point shaft hole portions  74  that are formed in the inner side metal plate right side plate  17 R and the inner side metal plate left side plate  17 L. 
     The supporting point shaft  236  is pushed against the upper end surfaces of the supporting point shaft hole portions  74  due to reaction force that is generated toward an upward direction in accordance with the pushing force that the pushing spring  38  applies to the pushing shafts  32 . 
     This roller conveying section  220  is made into a sub-assembly as the upper conveying unit  262  in a state in which the upper conveying guide  44 , and the pushing rollers  30 , the pushing shafts  32 , the pushing spring  38  and the supporting point shaft  236  that are mechanism parts within this upper conveying guide  44 , and the inner side metal plate  17  and the outer side metal plate  16  are made integral. The roller conveying section  220  is assembled due to the outer side metal plate  16  being fixed to the frame  19 . 
     By the way, the pushing rollers  30 , the pushing shafts  32 , the pushing spring  38  and the supporting point shaft  236 , that are charged because they are made of metal, must be connected to the frame  19  by conductors through which electricity flows, as a countermeasure to erroneous operation and noise that are due to static electricity. 
     However, the upper conveying guide  44  is a transparent, resin-molded product and is not electrically conductive. Therefore, at the roller conveying section  220 , the mechanism parts within the upper conveying guide  44  cannot be made to be electrically conductive with the frame  19  via the upper conveying guide  44 . 
     Therefore, at the roller conveying path  220 , although the upper conveying unit  262  is made into a sub-assembly, the mechanism parts within the upper conveying guide  44  can be made to be electrically conductive all the way to the frame  19  by holding the supporting point shaft  236  at the inner side metal plate  17 , and fixing the inner side metal plate  17  to the outer side metal plate  16 , and further, fixing the outer side metal plate  16  to the frame  19 . 
     SUMMARY OF INVENTION 
     Technical Problem 
     At the roller conveying section  220 , the number of the mechanism parts, that are made of metal and are disposed within the upper conveying guide  44  at the upper conveying unit  262  that has been made into a sub-assembly, that are made to be conductive all the way to the frame  19  as a countermeasure to static electricity, is large, and the structure becomes complex. 
     The present invention proposes a media conveying device and a media processing device that may be easily assembled while maintaining electrical conductivity in a simple structure. 
     Solution to Problem 
     A first aspect of the present invention is a media conveying device including: a conveying guide that is electrically non-conductive, that forms one side surface of a conveying path at which media are conveyed along a surface direction, and that has an internal space; a frame that is electrically conductive and holds the conveying guide; pushing rollers, provided in the internal space of the conveying guide, which convey the media, by nipping a media between the pushing rollers and driving rollers that face the pushing rollers with the conveying path therebetween, and by rotating; a pushing roller urging portion that applies pushing force that urges the pushing rollers toward the driving rollers; and a supporting point shaft that is electrically conductive, and whose position in a first direction, that is substantially orthogonal to a length direction of the supporting point shaft and a direction of the pushing force, is positioned by the conveying guide in vicinities of both end portions in the length direction, and that supports the pushing roller urging portion in a vicinity of a central portion in the length direction, and that abuts supporting point shaft abutment portions of the frame by receiving reaction force that arises in a direction of separating from the conveying path in accordance with the pushing force. 
     In the first aspect of the present invention, although the conveying unit, in which at least the conveying guide, the pushing rollers, the pushing roller urging portion and the supporting point shaft are made integral, is made into a sub-assembly, the parts at the interior of this conveying unit may be made to be conductive with the frame that is at the exterior. 
     A second aspect of the present invention is a media processing device including: an operation section that receives operations relating to a paper-sheet-like media; a conveying path that conveys the media along a surface direction in accordance with operation of the operation section; a conveying guide that is electrically non-conductive, and that forms one side surface of the conveying path, and that has an internal space; a frame that is electrically conductive and holds the conveying guide; pushing rollers, provided in the internal space of the conveying guide, that convey the media, by nipping the media between the pushing rollers and driving rollers that face the pushing rollers with the conveying path therebetween, and by rotating; a pushing roller urging portion that applies pushing force that urges the pushing rollers toward the driving rollers; and a supporting point shaft that is electrically conductive, and whose position in a direction, that is substantially orthogonal to a length direction of the supporting point shaft and a direction of the pushing force, is positioned by the conveying guide in vicinities of both end portions in the length direction, and that supports the pushing roller urging portion in a vicinity of a central portion in the length direction, and that abuts supporting point shaft abutment portions of the frame by receiving reaction force that arises in a direction of separating from the conveying path in accordance with the pushing force. 
     In the second aspect of the present invention, although the conveying unit, in which at least the conveying guide, the pushing rollers, the pushing roller urging portion and the supporting point shaft are made integral, is made into a sub-assembly, the parts at the interior of this conveying unit may be made to be conductive with the frame that is at the exterior. 
     Advantageous Effects of Invention 
     In accordance with the above-described aspects of the present invention, although the conveying unit, in which at least the conveying guide, the pushing rollers, the pushing roller urging portion and the supporting point shaft are made integral, is made into a sub-assembly, the parts at the interior of this conveying unit may be made to be conductive with the frame that is at the exterior. Thus, the above-described aspects of the present invention may realize a media conveying device and a media processing device that may be easily assembled while maintaining electrical conductivity in a simple structure. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view showing the external structure of a bank note processing device. 
         FIG. 2  is a right side view showing the internal structure of the bank note processing device. 
         FIG. 3  is a right side view showing structure ( 1 ) of a roller conveying section in accordance with a first exemplary embodiment. 
         FIG. 4  is a right side view showing structure ( 2 ) of the roller conveying section in accordance with the first exemplary embodiment. 
         FIG. 5  is a front view showing structure ( 3 ) of the roller conveying section in accordance with the first exemplary embodiment. 
         FIG. 6  is a front view showing structure ( 4 ) of the roller conveying section in accordance with the first exemplary embodiment. 
         FIG. 7  is a right side view showing the structure of a guide hole portion in accordance with the first exemplary embodiment. 
         FIG. 8  is a right side view showing the structures of a supporting point shaft, the guide hole portion and a frame hole portion in accordance with the first exemplary embodiment. 
         FIG. 9  is a right side view showing structure ( 1 ) of an upper conveying unit in accordance with the first exemplary embodiment. 
         FIG. 10  is a right side view showing structure ( 2 ) of the upper conveying unit in accordance with the first exemplary embodiment. 
         FIG. 11  is a right side view showing structure ( 3 ) of the upper conveying unit in accordance with the first exemplary embodiment. 
         FIG. 12  is a right side view showing structure ( 4 ) of the upper conveying unit in accordance with the first exemplary embodiment. 
         FIG. 13  is a right side view showing structure ( 1 ) of a roller conveying section in accordance with a second exemplary embodiment. 
         FIG. 14  is a right side view showing structure ( 2 ) of the roller conveying section in accordance with the second exemplary embodiment. 
         FIG. 15  is a right side view showing structure ( 3 ) of the roller conveying section in accordance with the second exemplary embodiment. 
         FIG. 16  is a right side view showing structure ( 4 ) of the roller conveying section in accordance with the second exemplary embodiment. 
         FIG. 17  is a right side view showing the structures of a supporting point shaft, the guide hole portion and a position restricting portion in accordance with the second exemplary embodiment. 
         FIG. 18  is a right side view showing structure ( 1 ) of a conventional roller conveying section. 
         FIG. 19  is a right side view showing structure ( 2 ) of the conventional roller conveying section. 
         FIG. 20  is a right side view showing structure ( 3 ) of the conventional roller conveying section. 
         FIG. 21  is a right side view showing structure ( 4 ) of the conventional roller conveying section. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiments for implementing the present invention (hereinafter called exemplary embodiments) are described in detail hereinafter by using the drawings. 
     1. First Exemplary Embodiment 
     1-1. External Structure of Bank Note Processing Device 
     As shown in  FIG. 1 , a bank note processing device  1  is a bank clerk operated terminal that a bank clerk of a financial institution (e.g., a clerk at the reception counter) operates, and carries out deposit/withdrawal processing of bank notes on the basis of operations of the bank clerk. 
     At this bank note processing device  1 , an insertion opening  3 A of a deposit section  3 , a dispense opening  4 A of a withdrawal section  4 , a display section  5  and an operation section  6  are provided at the upper end portion of a housing  2  that is box-shaped. 
     When bank notes to be deposited are inserted in from the insertion opening  3 A by the bank clerk, the deposit section  3  separates these bank notes one-by-one and takes the bank notes into the interior of the bank note processing device  1 . 
     The withdrawal section  4  stacks bank notes to be withdrawal, and has the bank clerk take the bank notes out from the dispense opening  4 A. Further, a shutter (not shown) that opens and closes the dispense opening  4 A is provided at the withdrawal section  4 , and opens at the time of dispensing the bank notes. 
     The display section  5  is structured by a liquid crystal display, and displays menu screens, screens of the results of various types of processings, and the like. The operation section  6  is structured by push buttons, and receives operations with respect to the bank note processing device  1 . 
     Moreover, although not illustrated, the bank note processing device  1  may communicate with terminals or the host computer of the financial institution via a network, and may transmit and receive various types of information to and from the terminals and host computer, and may be operated from the terminal sides. 
     1-2. Internal Structure of Bank Note Processing Device 
     As shown in  FIG. 2 , in addition to the above-described deposit section  3  and withdrawal section  4 , a discriminating section  10 , a temporary holding section  11 , bank note cassettes  12 A to  12 D, a bank note cassette  13  with a reject container, and a conveying path  14  are provided within the housing  2  of the bank note processing device  1 . 
     At the upper portion of the housing  2  interior, the deposit section  3  and the withdrawal section  4  are provided so as to be lined-up in the front-rear direction such that the deposit section  3  is at the rear side and the withdrawal section  4  is at the front side. Further, the temporary holding section  11  is provided obliquely downward to the front of the withdrawal section  4 . The discriminating section  10  is provided further toward the rear than the temporary holding section  11 , and obliquely downward to the rear of the deposit section  3 . 
     Moreover, the bank note cassettes  12 A to  12 D and the bank note cassette  13  with a reject container are provided at the lower portion of the housing  2  interior, to as to be lined-up in the front-rear direction. 
     At this bank note processing device  1 , the bank note cassette  13  with a reject container is at the front-most side, and, to the rear thereof, the bank note cassettes  12 A to  12 D are provided so as to be lined-up in the order of the bank note cassettes  12 A,  12 B,  12 C,  12 D. 
     Moreover, the conveying path  14 , that connects these respective sections that are the deposit section  3 , the withdrawal section  4 , the discriminating section  10 , the temporary holding section  11 , the bank note cassettes  12 A to  12 D and the bank note cassette  13  with a reject container, is provided within the housing  2 . The conveying path  14  conveys the bank notes along the short-side direction. 
     The conveying path  14  is structured by plural belt conveying sections and a roller conveying section  20  that is described later. At the belt conveying section, two sets of tapes, that are trained around pairs of rollers that are disposed so as to face one another and that circulate between the rollers, are provided, and the bank notes are nipped and conveyed from the both surface sides thereof by the two sets of tapes. 
     Mainly, the roller conveying section  20  is provided between belt conveying sections that are adjacent to one another, or, the roller conveying sections are provided adjacent to one another. The roller conveying section  20  nips and conveys bank notes by pushing rollers and driving rollers that are described later. 
     The deposit section  3  has a storage section  3 B that is shaped as a box and whose top surface is open. A portion of the opening of the storage section  3 B is the aforementioned insertion opening  3 A. At the time of a deposit transaction, the deposit section  3  separates one-by-one the bank notes to be deposited that have been inserted into the storage section  3 B from the insertion opening  3 A, and takes the bank notes into the interior of the bank note processing device  1 . 
     The withdrawal section  4  has a stacking portion  4 B that is shaped as a box and whose top surface is open. The opening of this stacking portion  4 B is the aforementioned discharge opening  4 A. At the time of a withdrawal transaction, the withdrawal section  4  stacks, in the stacking portion  4 B, the bank notes to be dispensed that have been conveyed-in from the bank note cassettes  12 A to  12 D and the like. 
     Further, a shutter (not illustrated) for opening and closing the dispense opening  4 A is provided at the withdrawal section  4 . This shutter opens after the bank notes to be dispensed have been stacked in the stacking portion  4 B. Due to the shutter opening, the bank clerk can take the bank notes to be dispensed, that are stacked in the stacking portion  4 B, out from the dispense opening  4 A. 
     The deposit section  3  and the withdrawal section  4  are fixed in states of being inclined forward such that the upper end portions thereof are positioned further forward than the lower end portions thereof. Note that the deposit section  3  and the withdrawal section  4  are not limited to such fixed types, and may be, for example, movable types whose slopes in the front-rear direction can be adjusted. 
     The discriminating section  10  discriminates the denomination, the authenticity, the undamaged/damaged state, the travelling state, and the like of the bank notes that are conveyed-in one-by-one via the conveying path  14 . This discriminating section  10  determines, per bank note and on the basis of the results of discrimination thereof, whether a bank note is a normal bank note that can be handled or is a reject bank note that cannot be handled. 
     The temporary holding section  11  temporarily stacks the bank notes that have been taken-in from the deposit section  3  and have been determined by the discriminating section  10  as being normal bank notes. After a transaction is established, the bank notes that are stacked in the temporary holding section  11  are sent-out from the temporary holding section  11  and conveyed to the discriminating section  10 , and, after the denominations thereof are specified by the discriminating section  10 , the bank notes are conveyed to and stored in the bank note cassettes  12 A to  12 D. 
     The respective bank note cassettes  12 A to  12 D have bank note storage containers  15 A to  15 D that are vertically long and can accommodate bank notes per denomination, and stack the bank notes, that are conveyed-in via the conveying path  14 , in piles in the top-bottom direction at the interiors of these bank note storage containers  15 A to  15 D. 
     Further, the bank note cassettes  12 A to  12 D not only store bank notes, but also can send the bank notes, that are stacked within the bank note storage containers  15 A to  15 D, out to the conveying path  14  one-by-one. Moreover, the bank note cassettes  12 A to  12 D are removable types that can be individually installed in and removed from the bank note processing device  1 . 
     The bank note cassette  13  with a reject container has a bank note storage container  13 A at the upper side thereof and a reject container  13 B at the lower side thereof. This bank note cassette  13  with a reject container also is a removable type that can be installed in and removed from the bank note processing device  1 . 
     In this bank note cassette  13  with a reject container, for example, bank notes, that are sent-out from the bank notes cassettes  12 A to  12 D at the time of collecting bank notes, are stored in the bank note storage container  13 A. Thereafter, the bank notes are collected by a bank clerk removing the bank note cassette  13  with a reject container from the bank note processing device  1 . 
     Further, at the time of replenishing bank notes, the bank clerk sets the bank note cassette  13  with a reject container, in which bank notes to be replenished are stored in the bank note storage container  13 A, in the bank note processing device  1 . Thereafter, the bank notes to be replenished that are stored in the bank note storage container  13 A are sent-out from the bank note cassette  13  with a reject container, and go through the discriminating section  10 , and are conveyed to and replenished into the bank note cassettes  12 A to  12 D. The replenishing of bank notes is carried out in this way at the bank note processing device  1 . 
     In this way, the bank note storage container  13 A of the bank note cassette  13  with a reject container can be used for plural applications. 
     Further, the reject container  13 B of the bank note cassette  13  with a reject container stacks the bank notes that have been determined as being reject bank notes by the discriminating section  10 . 
     Further, a control section (not shown) that controls the entire bank note processing device  1  is provided at a predetermined place within the housing  2  of the bank note processing device  1 . 
     With this structure, at the bank note processing device  1 , the control section controls the respective sections on the basis of the results of discrimination of bank notes by the discriminating section  10 , and the like, and carries out deposit processing or withdrawal processing of bank notes. 
     Namely, at the bank note processing device  1 , at the time of a deposit transaction, when deposit transaction is selected by the bank clerk via the operation section  6 , and further, bank notes are inserted into the deposit section  3  from the insertion opening  3 A, the inserted bank notes are conveyed one-by-one to the discriminating section  10 . 
     Here, the bank note processing device  1  conveys bank notes, that have been determined by the discriminating section  10  as being normal bank notes, to the temporary holding section  11  and stores the bank notes temporarily. On the other hand, the bank note processing device  1  returns bank notes, that have been determined as being deposit reject bank notes that are unsuited for depositing, to the withdrawal section  4 , and, by opening the shutter, returns the bank notes to the bank clerk. 
     Thereafter, when the deposit amount is confirmed by the bank clerk, the bank note processing device  1  conveys the bank notes, that are stored in the temporary holding section  11 , to the discriminating section  10  and discriminates the denominations, and, in accordance with the denominations thereof, conveys the bank notes to and stores the bank notes in the respective bank note cassettes  12 A to  12 D. 
     On the other hand, at time of a withdrawal transaction, when withdrawal transaction is selected and the amount to be dispensed and the like are inputted by the bank clerk via the operation section  6 , the bank note processing device  1  identifies the number of bank notes of each denomination that is needed in accordance with the requested amount, and sends the bank notes out one-by-one from the respective bank note cassettes  12 A to  12 D in accordance with the number of bank notes per denomination, and conveys the bank notes to the discriminating section  10 . 
     Here, the bank note processing device  1  conveys bank notes, that are determined by the discriminating section  10  as being normal bank notes, to the withdrawal section  4 . On the other hand, the bank note processing device  1  conveys bank notes, that are determined as being withdrawal reject bank notes that are unsuitable for withdrawal, to the temporary holding section  11  and temporarily stores the bank notes. 
     Then, when the bank notes of the requested amount are stacked in the withdrawal section  4 , the bank note processing device  1  opens the shutter. Due thereto, there becomes a state in which receipt of the bank notes that are stacked within the withdrawal section  4  is possible, and the bank clerk accepts the bank notes. 
     Thereafter, the bank note processing device  1  conveys the withdrawal reject bank notes, that are stored in the temporary holding section  11 , to the reject container  13 B of the bank note cassette  13  with a reject container, and stores them therein. 
     In this way, the bank note processing device  1  carries out depositing processing and withdrawal processing of bank notes. 
     1-3. Structure of Roller Conveying Section 
     The roller conveying section  20  in accordance with the first exemplary embodiment is illustrated in  FIG. 3  to  FIG. 6  in which the same reference numerals are given to the portions corresponding to  FIG. 18  to  FIG. 21 . 
       FIG. 3  shows the roller conveying section  20  seen from the right side of the frame right side plate  19 R, and  FIG. 4  shows the roller conveying section  20  seen from the right side through the frame right side plate  19 R, the upper guide right side plate  44 R and the lower guide right side plate  46 R. In  FIG. 4 , the frame right side plate  19 R and the upper guide right side plate  44 R are shown virtually by the two-dot chain lines. 
       FIG. 5  shows the roller conveying section  20  seen from the front side of the upper guide front side plate  44 F and the lower guide front side plate  46 F.  FIG. 6  shows the roller conveying section  20  seen from the front side through the upper guide front side plate  44 F and the lower guide front side plate  46 F. 
     At this roller conveying section  20 , an upper conveying unit  62  in which plural mechanism parts are combined is made into a sub-assembly. At the time of manufacturing the bank note processing device  1 , the roller conveying section  20  is assembled due to the upper conveying unit  62  that has been assembled in advance being fit into the frame  19 . 
     As shown in  FIG. 4 , the roller conveying section  20  is structured by a front side conveying section  22  and a rear side conveying section  24 . Because the front side conveying section  22  and the rear side conveying section  24  are formed substantially similarly to one another, hereinafter, mainly the front side conveying section  22  is described. 
     At the roller conveying section  20 , the front side conveying section  22 , that is formed from driving rollers  26 F, pushing rollers  30 F, pushing roller rails  34 F and the like, and the rear side conveying section  24 , that is formed from driving rollers  26 B, pushing rollers  30 B, pushing roller rails  34 B and the like, are disposed so as to have front-rear symmetry (left-right symmetry in the drawing) across a supporting point shaft  36  that is made of metal. Hereinafter, the driving rollers  26 F and  26 B are collectively called the driving rollers  26 , the pushing rollers  30 F and  30 B are collectively called the pushing rollers  30 , and the pushing roller rails  34 F and  34 B are collectively also called the pushing roller rails  34 . 
     The bank note conveying path  48 , at which bank notes are conveyed with the upper side and lower side thereof being guided respectively by the upper conveying guide  44  and the lower conveying guide  46 , is formed at this roller conveying section  20 . 
     The upper conveying guide  44 , that is formed in a plate shape and is resin molded and is transparent, is provided at the upper side of the bank note conveying path  48 . 
     At the upper conveying guide  44 , the left and right end portions of an upper guide bottom plate  44 D, that extends along the horizontal direction toward the front and rear and left and right in a vicinity of the lower end portions of the pushing rollers  30 , are bent upward, and an upper guide left side plate  44 L and the upper guide right side plate  44 R are respectively formed. Further, the front and rear end portions of the upper guide bottom plate  44 D are bent upward, and the upper guide front side plate  44 F and an upper guide rear side plate  44 B are respectively formed. 
     Due thereto, the upper conveying guide  44  has, at the upper side of the upper guide bottom plate  44 D, an interior space in which mechanism parts are disposed. 
     Due to openings (not shown) being formed in the upper guide bottom plate  44 D at positions facing the pushing rollers  30 , the lower end portions of the pushing rollers  30  project-out to the lower side of the upper guide bottom plate  44 D. 
     On the other hand, the lower conveying guide  46 , that is formed in a plate shape and is formed from a metal plate and is not transparent, is provided at the lower side of the bank note conveying path  48 . At the lower conveying guide  46 , the front, rear, left and right end portions of a lower guide ceiling plate  46 U, that extends parallel to the upper guide conveying plate  44 D in a vicinity of the upper end portions of the driving rollers  26 , are bent downward, and the lower guide front side plate  46 F, a lower guide rear side plate  46 B, the lower guide right side plate  46 R and a lower guide left side plate  46 L are respectively formed. 
     Due to openings (not shown) being formed in the lower guide ceiling plate  46 U at positions facing the driving rollers  26 , the upper end portions of the driving rollers  26  project-out to the upper side of the lower guide ceiling plate  46 U. 
     The bank note conveying path  48 , at which a bank note that has been conveyed-in from a belt conveying section or a roller conveying section that is a portion of the conveying path  14  ( FIG. 2 ) is conveyed from front to rear or from rear to front, is formed in the space of the gap between the upper conveying guide  44  and the lower conveying guide  46  at the roller conveying section  20 . 
     The frame right side plate  19 R and the frame left side plate  19 L, that are plate-shaped and made of metal, extend along the vertical direction at the outer sides in the left-right direction of the upper conveying guide  44  and the lower conveying guide  46 , and are fixed to the housing  2  ( FIG. 2 ). Hereinafter, the frame right side plate  19 R and the frame left side plate  19 L are also collectively called the frame  19 . 
     The left and right end portions of the upper conveying guide  44  and the lower conveying guide  46  are held at the frame  19 . 
     In this way, the roller conveying section  20  restricts the range of conveying of a bank note at the bank note conveying path  48 , by the upper conveying guide  44 , the lower conveying guide  46  and the frame  19 . 
     At the lower portion of the front side conveying section  22 , the two driving rollers  26 F ( 26 FL and  26 FR) that are made of metal are provided so as to be lined-up left and right with a gap therebetween that is shorter than the length of the bank notes in the long-side direction, so as to rotate freely clockwise and counterclockwise in  FIG. 4  with a driving roller shaft  28 F, that is cylindrical and made of metal and is mounted to the frame  19  along the left-right direction, being the shaft. 
     The pushing rollers  30 F ( 30 FL and  30 FR) that are made of metal are provided at the upper portions of the respective driving rollers  26 F so as to face the driving rollers  26 F. The two pushing rollers  30 F are provided so as to be lined-up left and right and so as to rotate freely clockwise and counterclockwise in  FIG. 4  with a pushing shaft  32 F, that is cylindrical and made of metal and extends in the left-right direction, being the shaft. Therefore, the pushing rollers  30 F and the pushing shaft  32 F are electrically conductive. 
     The pushing roller rails  34 F ( 34 FR and  34 FL), that are transparent and are resin molded such that the upper portions thereof are open, are provided integrally with the upper conveying guide  44  at the right side of the pushing roller  30 FR and the left side of the pushing roller  30 FL. 
     The opening width in the front-rear direction of the pushing roller rails  34 F is formed to be slightly larger than the front-rear width of the pushing shaft  32 F. Due thereto, the pushing roller rails  34 F cause the pushing shaft  32 F to slide in the vertical direction. 
     The rear side conveying section  24  is structured similarly to this front side conveying section  22 , at the rear side of the supporting point shaft  36 . 
     The supporting point shaft  36  is cylindrical and formed of metal and extends in the left-right direction. A supporting point shaft right end portion  36 R that is the right end portion and a supporting point shaft left end portion  36 L that is the left end portion are formed so as to be narrower than a supporting point shaft central portion  36 C that is the central portion in the left-right direction. 
     Guide hole portions  50 , that are shown in  FIG. 7  and are substantially gourd-shaped, are formed in the upper guide left side plate  44 L and the upper guide right side plate  44 R at positions facing the supporting point shaft  36 . 
     At the guide hole portion  50 , an insertion hole portion  52  that is round is formed at the lower portion, and a fit-in hole portion  54 , whose width in the front-rear direction is slightly smaller than that of the insertion hole portion  52 , is formed at the upper side of the insertion hole portion  52 . A fit-in upper end surface  54 U, that curves substantially the same as the outer peripheral surface of the supporting point shaft  36 , is formed at the upper end portion of the fit-in hole portion  54 , and a fit-in rear end surface  54 B is formed at the rear end portion of the fit-in hole portion  54 , and a fit-in front end surface  54 F is formed at the front end portion of the fit-in hole portion  54 , respectively. 
     By forming the widths of the fit-in hole portions  54  in the front-rear direction to be slightly larger than the outer shapes of the supporting point shaft left end portion  36 L and the supporting point shaft right end portion  36 R of the supporting point shaft  36 , there is a structure in which the supporting point shaft  36  can be inserted through the interiors. 
     Further, frame hole portions  56 , that are shown in  FIG. 8  and are L-shaped, are formed in the frame  19  at positions facing the supporting point shaft  36 . 
     This frame hole portion  56  is structured from a vertically long hole portion  58  that is cut-out downward from the upper end of the frame  19 , and a laterally long hole portion  60  at which the frame  19  is cut-out toward the rear from the lower end of the vertically long hole portion  58 . 
     A laterally long upper end surface  60 U, that is the top surface of the laterally long hole portion  60 , is positioned slightly further downward than the fit-in upper end surface  54 U of the fit-in hole portion  54  at the guide hole portion  50 . 
     The supporting point shaft left end portion  36 L and the supporting point shaft right end portion  36 R of the supporting point shaft  36  are inserted through the guide hole portions  50 , and are inserted into and fixed to the frame hole portions  56 . Due thereto, the supporting point shaft  36  is electrically conductive with the frame  19 . 
     Further, at the supporting point shaft  36 , the right side surface of the supporting shaft central portion  36 C abuts the left side surface of the upper guide right side plate  44 R, and the left side surface of the supporting point shaft central portion  36 C abuts the right side surface of the upper guide left side plate  44 L. 
     Due thereto, positional offset, in the left-right direction, of the supporting point shaft  36  with respect to the upper conveying guide  44  is restricted. 
     As shown in  FIG. 4  and  FIG. 6 , a wound portion  40 , that is the central portion in the front-rear direction of a single metal rod at the pushing spring  38  that is a torsion spring made of metal, is wound on the supporting point shaft  36 . A front arm portion  41  that is a portion of the torsion spring extends in the frontward direction from the wound portion  40 , and a rear arm portion  42  extends in the rearward direction, respectively. 
     At the pushing spring  38 , in the state in which the front end portion of the front arm portion  41  and the rear end portion of the rear arm portion  42  are positioned further upward than the natural state, the front end portion of the front arm portion  41  and the rear end portion of the rear arm portion  42  abut and are electrically conductive with the upper end of the pushing shaft  32 F and the upper end of a pushing shaft  32 B, respectively. 
     Therefore, at the pushing spring  38 , due to the repulsive force that attempts to return the pushing spring  38  to its natural state, the front arm portion  41  applies pushing force, that is urging force in the downward direction, to the pushing shaft  32 F, and the rear arm portion  42  applies pushing force, that is urging force in the downward direction, to the pushing shaft  32 B. 
     Due thereto, the pushing spring  38  applies pushing force in the downward direction to the pushing rollers  30 F and  30 B that are supported by the pushing shafts  32 F and  32 B respectively, and pushes the outer peripheral surfaces of these pushing rollers  30 F and  30 B against the outer peripheral surfaces of the driving rollers  26 F and  26 B. 
     In this state, the pushing shafts  32  do not contact rail lower end surfaces  34 D that restrict movement of these pushing shafts  32  in the downward direction at the pushing roller rails  34 , and are positioned slightly further upward than these rail lower end surfaces  34 D. 
     At the roller conveying section  20 , upwardly-directed reaction force, that corresponds to the downwardly-directed pushing force, is applied to the supporting point shaft  36  via the pushing spring  38 . 
     Therefore, due to the supporting point shaft  36  being pushed against the laterally long upper end surfaces  60 U of the frame hole portions  56 , the supporting point shaft  36  directly contacts the frame  19  and is electrically conductive therewith. 
     Because the pushing rollers  30  ( 30 F and  30 B) are pushed against the driving rollers  26  ( 26 F and  26 B), the pushing rollers  30  rotate together in accordance with the rotation of the driving rollers  26 . 
     In this way, at the roller conveying section  20 , the pushing rollers  30 F and  30 R are urged by the pushing spring  38 , and the front portion and the rear portion of the bank note that is being conveyed are nipped between the pushing rollers  30 F and the driving rollers  26 F that are disposed at the front, and by the pushing rollers  30 B and the driving rollers  26 B that are disposed at the rear, respectively. 
     Namely, the roller conveying section  20  nips the bank note, that has been conveyed-in from the rear side in  FIG. 4  for example, by the pushing rollers  30  and the driving rollers  26  that rotate, and conveys the bank note toward the front side in the drawing, while preventing folding-over and the like by the upper conveying guide  44  and the lower conveying guide  46 . 
     At the roller conveying section  20 , the upper conveying guide  44  is structured from a transparent member. Therefore, merely by looking at the roller conveying section  20  from above, a worker may easily confirm the state of the bank note that is being conveyed along the bank note conveying path  48 , and, in a case in which a bank note becomes jammed, may quickly find that bank note. 
     1-4. Assembly of Roller Conveying Section 
     The upper conveying unit  62  in accordance with the first exemplary embodiment of the present invention is shown in  FIG. 9  to  FIG. 12 .  FIG. 9  shows the upper conveying unit  62  seen from the right side of the upper guide right side plate  44 R, and  FIG. 10  shows the upper conveying unit  62  seen from the right side through the upper guide right side plate  44 R. In  FIG. 10 , the upper guide right side plate  44 R is shown virtually by the two-dot chain line. 
       FIG. 11  shows the upper conveying unit  62  seen from the front side of the upper guide front side plate  44 R.  FIG. 12  shows the upper conveying unit  62  seen from the front side through the upper guide front side plate  44 F. 
     At the roller conveying section  20 , the upper conveying unit  62  is made into a sub-assembly. At the time when the bank note processing device  1  is manufactured, the roller conveying section  20  is assembled due to the upper conveying unit  62 , that has been assembled in advance, being fit into the frame  19 . 
     At the time of assembling this upper conveying unit  62 , first, the worker mounts the pushing rollers  30  and the pushing shafts  32  to the upper conveying guide  44  by fitting the left and right end portions of the pushing shafts  32 , that have been inserted through the pushing rollers  30 , into the pushing roller rails  34  of the upper conveying guide  44 . 
     Next, the worker inserts the supporting point shaft  36  into the insertion hole portion  52  of the guide hole portion  50  from the outer side of either of the upper guide right side plate  44 R or the upper guide left side plate  44 L, and inserts the supporting point shaft  36  through the wound portion  40  of the pushing spring  38 . 
     Moreover, the worker mounts the supporting point shaft  36  and the pushing spring  38  to the upper conveying guide  44  by fitting the supporting point shaft left end portion  36 L and the supporting point shaft right end portion  36 R into the guide hole portions  50  while causing the front arm portion  41  and the rear arm portion  42  of the pushing spring  38  to abut the upper sides of the pushing shafts  32 F and  32 B respectively. 
     At this time, due to the reaction force from the pushing spring  38 , movement of the supporting point shaft  36  is restricted due to the supporting point shaft  36  being pushed such that the upper end portion abuts the fit-in upper end surfaces  54 U of the fit-in hole portions  54  at the guide hole portions  50 , and due to the front end portion abutting the fit-in front end surfaces  54 F and the rear end portion abutting the fit-in rear end surfaces  54 B respectively. Due to the above-described processes, the upper conveying unit  62  is assembled into one sub-assembly. 
     In this state, the supporting point shaft  36  is positioned such that the position thereof in the vertical direction with respect to the upper conveying guide  44  is further upward than in the state in which the roller conveying section  20  has been assembled. Further, due to the pushing force from the pushing spring  38 , the pushing rollers  30  are pushed against the rail lower end surfaces  34 D of the pushing roller rails  34 . 
     Therefore, although the reaction force from the pushing spring  38  is slightly weaker than in the state in which the roller conveying section  20  has been assembled, the supporting point shaft  36  is urged by the reaction force from the pushing spring  38 , and does not come-out from the upper conveying guide  44 . Due thereto, the upper conveying unit  62  can be made into a sub-assembly. 
     Next, the worker assembles the roller conveying section  20 . First, the worker inserts the left and right end portions of the driving roller shafts  28 , that have been inserted through the driving rollers  26 , into hole portions that are not illustrated and that are formed in the frame  19 . 
     Next, the worker fixes the lower conveying guide  46  to the frame  19  by fitting the lower conveying guide  46  into hole portions, that are formed in the frame  19  and are not illustrated, from above. 
     Next, the worker mounts the upper conveying unit  62 , that has been made into a sub-assembly, to the frame  19 . Concretely, the worker inserts the supporting point shaft  36 , that projects-out to the exterior from the upper guide right side plate  44 R and the upper guide left side plate  44 L, in the downward direction along the arrow in  FIG. 8  from the vertically long hole portions  58  of the frame hole portions  56 , and thereafter, moves the supporting point shaft  36  in the rearward direction along the laterally long hole portions  60 . 
     At this time, the upper conveying unit  62  is positioned at the frame  19  due to predetermined projections of the upper conveying guide  44  being fit into predetermined hole portions that are provided together with the frame hole portions  56  in the frame  19 . Due to the above-described processes, the roller conveying section  20  is assembled. 
     At the roller conveying section  20 , the laterally long upper end surfaces  60 U of the frame hole portions  56  are positioned slightly further downward than the fit-in upper end surfaces  54 U of the guide hole portions  50 . 
     Therefore, due to the reaction force from the pushing spring  38 , the supporting point shaft  36  is pushed such that the upper end portion thereof abuts the laterally long upper end surfaces  60 U of the laterally long hole portions  60 . 
     Further, more so than in the state in which the upper conveying unit  62  is a unit by itself that has not been assembled into the frame  19 , the pushing spring  38  is compressed and a greater reaction force is applied to the supporting point shaft  36 . Due thereto, the supporting point shaft  36  is urged in the upward direction more strongly than in the state in which the upper conveying guide  44  is a unit by itself, and contacts the frame  19 . 
     Further, movement of the supporting point shaft  36  is restricted due to the left end portion abutting the fit-in front end surfaces  54 F of the fit-in hole portions  54  at the guide hole portions  50 , and the rear end portion abutting the fit-in rear end surfaces  54 B, respectively. 
     In this way, at the roller conveying section  20 , due to reaction force being applied from the pushing spring  38  to the supporting point shaft  36  and the supporting point shaft  36  being inserted in the frame hole portions  56 , the supporting point shaft  36  is made to contact the frame  19  directly, and may be made to be electrically conductive. 
     Due thereto, at the roller conveying section  20 , the pushing spring  38  is made to contact the pushing shafts  32  that are made of metal, and the supporting point shaft  36  is made to contact the pushing spring  38 , and moreover, the supporting point shaft  36  is made to contact the frame  19 . Due thereto, these pushing shafts  32 , pushing spring  38 , and supporting point shaft  36  that are made of metal can be made to be electrically conductive with the frame  19 . 
     1-5. Operation and Effects 
     In the above-described structure, at the roller conveying section  20 , due to the supporting point shaft  36  being fit into the fit-in hole portions  54  of the guide hole portions  50 , positioning of the supporting point shaft  36  in the front-rear direction with respect to the upper conveying guide  44  is carried out, and the supporting point shaft  36  is pushed against the fit-in upper end surfaces  54 U of the guide hole portions  50  by using the reaction force of the pushing spring  38 . Due thereto, positioning, in the upward direction, of the supporting point shaft  36  with respect to the upper conveying guide  44  is carried out. 
     Due thereto, the mechanism parts at the interior of the upper conveying guide  44  are fixed to the upper conveying guide  44 , and the upper conveying unit  62  can be structured as one sub-assembly. Therefore, at the time of assembling the roller conveying section  20 , the roller conveying section  20  may be assembled merely by assembling the upper conveying unit  62 , that has already been assembled, to the frame  19 , and assembly may be made easy. 
     Here, at the time of assembling the upper conveying unit  62 , if the supporting point shaft  36  were to not contact the upper conveying guide  44  at a predetermined position while being pushed in a predetermined direction, the upper conveying unit  62  could not be made into a sub-assembly because the structural members at the interior of the upper conveying guide  44  could not be fixed to the upper conveying guide  44 . 
     In contrast, in the upper conveying guide  62 , due to the supporting point shaft  36  being pushed against the upper conveying guide  44  along the direction of the reaction force of the pushing spring  38  by using this reaction force, the position of the supporting point shaft  36  in the vertical direction is positioned with respect to and fixed to the upper conveying guide  44 , and, by fitting the supporting point shaft  36  into the fit-in hole portions  54 , the position of the supporting point shaft  36  in the front-rear direction is positioned. Therefore, the upper conveying unit  62  may be made into a sub-assembly. 
     Further, at the roller conveying section  20 , the upper conveying unit  62  is mounted to the frame  19 , and the supporting point shaft  36  is pushed-against the laterally long upper end surfaces  60 U of the frame hole portions  56  by using the reaction force of the pushing spring  38 . Due thereto, the supporting point shaft  36  may be made to directly contact the frame  19 , and may be made to be electrically conductive with respect to the frame  19 . 
     Due thereto, at the roller conveying section  20 , the upper conveying unit  62  is made into a sub-assembly, and the efficiency of assembling the roller conveying section  20  improves, and the supporting point shaft  36  is made to contact the frame  19 . Due thereto, the pushing rollers  30 , the pushing shafts  32  and the pushing spring  38  that are metal parts are made to be conductive with the frame  19 , and the generation of static electricity at the mechanism parts at the interior of the upper conveying guide  44  may be prevented by a simple structure. 
     Further, at the roller conveying section  20 , the outer side metal plate  16  and the inner side metal plate  17  can be omitted as compared with the conventional roller conveying section  220 . Therefore, the number of conductive parts that must be connected as a countermeasure to static electricity may be reduced, and the weight of and the cost of the roller conveying section  20  may be reduced. 
     Further, at the roller conveying section  20 , the interior can be viewed from the exterior by forming the upper conveying guide  44  to be transparent by resin molding. However, in this case, because the upper conveying guide  44  is an insulator, the mechanism parts at the interior of the upper conveying guide  44  cannot be made to be conductive with the frame  19  via the upper conveying guide  44 . 
     Therefore, there was the possibility that the structure for making the mechanism parts at the interior of the upper conveying guide  44  be conductive with the frame  19  would become complex. 
     In contrast, at the roller conveying section  20 , by causing the supporting point shaft  36  to contact the frame  19  by utilizing the reaction force of the pushing spring  38 , the mechanism parts at the interior of the upper conveying guide  44  can be made to be conductive with the frame  19  by a simple structure. 
     Further, if the upper conveying guide were to be made to be conductive due to the mixing-in of a conductive material at the time of resin molding, the parts at the interior of the upper conveying guide could be made to be conductive with the frame via the upper conveying guide. 
     However, in this case, the upper conveying guide would no longer be transparent, and the visibility of the bank note conveying path  48  would deteriorate. In contrast, at the roller conveying section  20 , the mechanism parts at the interior of the upper conveying guide  44  can be made to be conductive with the frame  19  while the visibility of the bank note conveying path  48  is maintained. 
     In accordance with the above-described structure, the roller conveying section  20  that serves as a media conveying device in the bank note processing device  1  has: the upper conveying guide  44  that is electrically non-conductive, and that forms one side surface of the bank note conveying path  48  at which bank notes are conveyed along a surface direction, and that has an internal space; the frame  19  that is electrically conductive and holds the upper conveying guide  44 ; the pushing rollers  30  that are provided in the internal space of the upper conveying guide  44 , and that convey bank notes by nipping the bank notes between the pushing rollers  30  and the driving rollers  26 , that face the pushing rollers  30  with the bank note conveying path  48  therebetween, and rotating; the pushing spring  38  that applies pushing force that urges the pushing rollers  30  toward the driving rollers  26 ; and the supporting point shaft  36  that is electrically conductive, and whose position in a direction, that is substantially orthogonal to the length direction of the supporting point shaft  36  and the pushing force direction, is positioned by the upper conveying guide  44  at the supporting shaft left end portion  36 L and the supporting shaft right end portion  36 R that are vicinities of both end portions in the length direction, and that supports the pushing spring  38  at the supporting point shaft central portion  36 C that is a vicinity of the central portion in the length direction, and that abuts the laterally long upper end surfaces  60 U, that serve as supporting point shaft abutment portions, of the frame  19  by receiving reaction force that arises in a direction of separating from the bank note conveying path  48  in accordance with the pushing force. 
     Due thereto, at the roller conveying section  20 , although the upper conveying unit  62  is made into a sub-assembly, the parts at the interior of the upper conveying unit  62  may be made to be conductive with the frame  19  that is at the exterior. 
     2. Second Exemplary Embodiment 
     2-1. Structure of Roller Conveying Section 
     As shown in  FIG. 13  to  FIG. 16  in which the same reference numerals are given to parts corresponding to  FIG. 3  to  FIG. 6 , the bank note processing device  1  in accordance with the second exemplary embodiment is structured similarly to the bank note processing device  1  in accordance with the first exemplary embodiment, although a roller conveying section  120  differs from the roller conveying section  20 . 
     Further, at the roller conveying section  120  in accordance with the second exemplary embodiment, a frame  119  differs from the frame  19  in accordance with the first exemplary embodiment. 
     At the frame  119 , in addition to a frame left side plate  119 L and a frame right side plate  119 R that extend along the vertical direction at the outer sides in the left-right direction of an upper conveying guide  144  and the lower conveying guide  46 , there is provided a frame ceiling plate  119 U that connects the upper end portions of the frame left side plate  119 L and the frame right side plate  119 R along the horizontal direction and that covers the upper conveying guide  144  from the upper side. 
     Further, position restricting portions  70 , that are parallelepiped and project-out in the downward direction, are formed at places of the bottom surface of the frame ceiling plate  119 U, which places face a supporting point shaft  136 . The position restricting portions  70  abut vicinities of the end portions in the left-right direction of a supporting point shaft central portion  136 C at the supporting point shaft  136 . 
     Further, due to the supporting point shaft  136  being formed such that the length thereof in the left-right direction is shorter than that of the supporting point shaft  36  ( FIG. 6 ), a supporting point shaft left end portion  136 L and a supporting point shaft right end portion  136 R at the supporting point shaft  136  fit into the guide hole portions  50  that are formed in the upper conveying guide  144 , but do not contact the frame  119 . Further, differently than the frame  19 , the frame hole portions  56  are not formed in the frame  119 . 
     2-2. Assembly of Roller Conveying Section 
     At this roller conveying section  120 , an upper conveying unit  162  is made into a sub-assembly in the same way as the upper conveying unit  62 . At the time when the bank note processing device  1  is manufactured, the roller conveying section  120  is assembled due to the upper conveying unit  162 , that has been assembled in advance, being fit into the frame  119 . 
     At the time of assembling this upper conveying unit  162 , the worker carries out processes that are similar to those of the above-described upper conveying unit  62 , and assembles the upper conveying unit  162  as one sub-assembly. 
     In the state in which the upper conveying unit  162  is a unit by itself, the position of the supporting point shaft  136  in the vertical direction with respect to the upper conveying guide  44  is positioned further toward the upper side than in the state in which the roller conveying section  120  has been assembled. Further, due to the pushing force from the pushing spring  38 , the pushing rollers  30  are pushed against the rail lower end surfaces  34 D of the pushing roller rails  34 . 
     Therefore, although the reaction force from the pushing spring  38  is slightly weaker than in the state in which the roller conveying section  120  has been assembled, the supporting point shaft  36  is urged by the reaction force from the pushing spring  38 , and does not come-out from the upper conveying guide  144 . Due thereto, the upper conveying unit  162  can be made into a sub-assembly. 
     Next, the worker assembles the roller conveying section  120 . First, the worker carries out processes that are similar to those of the above-described roller conveying section  20 , and assembles the driving rollers  26 , the driving roller shafts  28  and the lower conveying guide  46  to the frame  119 . 
     Next, the worker mounts the upper conveying unit  162 , that has been made into a sub-assembly, to the frame  119 . Concretely, the worker positions the supporting point shaft  136  beneath position restricting bottom end surfaces  70 D that are the bottom end surfaces of the position restricting portions  70 , and fits predetermined projections of the upper conveying guide  144  into predetermined hole portions that are provided in the frame  19 . Due thereto, the upper conveying unit  162  is positioned at the frame  119 . Due to the above-described processes, the roller conveying section  20  is assembled. 
     As shown in  FIG. 17 , at the roller conveying section  120 , the position restricting bottom end surfaces  70 D are positioned slightly further toward the lower side than the fit-in upper end surfaces  54 U of the guide hole portions  50 . 
     Therefore, due to the reaction force from the pushing spring  38 , the supporting point shaft  136  is pushed such that the upper end portion thereof abuts the position restricting bottom end surfaces  70 D of the position restricting portions  70 . 
     Further, more so than in the state in which the upper conveying unit  162  is a unit by itself that has not been assembled into the frame  119 , the pushing spring  38  is compressed and a greater reaction force is applied to the supporting point shaft  136 . Due thereto, the supporting point shaft  136  is urged in the upward direction more strongly than in the state in which the upper conveying guide  144  is a unit by itself, and contacts the frame  119 . 
     Further, movement of the supporting point shaft  136  is restricted due to the left end portion abutting the fit-in front end surfaces  54 F of the fit-in hole portions  54  at the guide hole portions  50 , and the rear end portion abutting the fit-in rear end surfaces  54 B, respectively. 
     In this way, at the roller conveying section  120 , due to reaction force being applied from the pushing spring  38  to the supporting point shaft  136  and the supporting point shaft  136  being made to abut beneath the position restricting bottom end surfaces  70 D, the supporting point shaft  136  is made to contact the frame  119  directly, and may be made to be electrically conductive. 
     Due thereto, at the roller conveying section  120 , the pushing spring  38  is made to contact the pushing shafts  32  that are made of metal, and the supporting point shaft  136  is made to contact the pushing spring  38 , and moreover, the supporting point shaft  136  is made to contact the frame  119 . Due thereto, these pushing shafts  32 , pushing spring  38 , and supporting point shaft  136  that are made of metal may be made to be electrically conductive with the frame  119 . 
     In this way, at the roller conveying section  20  ( FIG. 4 ), the supporting point shaft  36  is made to contact the frame  19  due to the supporting point shaft  36  being inserted into the frame hole portions  56 . However, at the roller conveying section  120 , the supporting point shaft  136  is pushed upward from beneath against the position restricting portions  70  of the frame  119 . 
     Due thereto, at the roller conveying section  120 , the upper conveying unit  162  is made into a sub-assembly, and the efficiency of assembling the roller conveying section  120  improves, and the supporting point shaft  136  is made to contact the frame  119 . Due thereto, the pushing rollers  30 , the pushing shafts  32  and the pushing spring  38  that are metal parts are made to be conductive with the frame  119 , and the generation of static electricity at the mechanism parts at the interior of the upper conveying guide  144  may be prevented by a simple structure. 
     In accordance with the above-described structure, the roller conveying section  120  that serves as a media conveying device at the bank note processing device  1  has: the upper conveying guide  144  that is electrically non-conductive, and that forms one side surface of the bank note conveying path  48  at which bank notes are conveyed along a surface direction, and that has an internal space; the frame  119  that is electrically conductive and holds the upper conveying guide  144 ; the pushing rollers  30  that are provided in the internal space of the upper conveying guide  144 , and that convey the bank notes by nipping the bank notes between the pushing rollers  30  and the driving rollers  26 , that face the pushing rollers  30  with the bank note conveying path  48  therebetween, and rotating; the pushing spring  38  that applies pushing force that urges the pushing rollers  30  toward the driving rollers  26 ; and the supporting point shaft  136  that is electrically conductive, and whose position in a direction, that is substantially orthogonal to a length direction of the supporting point shaft  136  and the pushing force direction, is positioned by the upper conveying guide  144  at a supporting point shaft left end portion  136 L and a supporting point shaft right end portion  136 R that are vicinities of both end portions in the length direction, and that supports the pushing spring  38  at the supporting point shaft central portion  136 C that is a vicinity of the central portion in the length direction, and that abuts position restricting bottom end surfaces  70 D, that serve as supporting point shaft abutment portions, of the frame  119  by receiving reaction force that arises in a direction of separating from the bank note conveying path  48  in accordance with the pushing force. 
     Due thereto, at the roller conveying section  120 , although the upper conveying unit  162  is made into a sub-assembly, the parts at the interior of the upper conveying unit  162  may be made to be conductive with the frame  119  that is at the exterior. 
     3. Other Exemplary Embodiments 
     Note that the above-described exemplary embodiments describe cases in which the upper conveying guide  44  is formed to be transparent. The present invention is not limited to this, and, for example, the upper conveying guide may be formed to be semi-transparent, and, in short, it suffices for the upper conveying guide to be formed such that the interior can be viewed through from the exterior. 
     Further, the above-described embodiments described above describe cases in which the upper conveying guide  44  is formed to be transparent, and the lower conveying guide  46  is formed from a metal plate that is non-transparent and is high-strength. The present invention is not limited to this, and the lower conveying guide  46  may be formed to be transparent. 
     Moreover, the above-described exemplary embodiments describe cases in which the roller conveying section  20  is structured from the two sets of conveying sections at the front and the rear that are the front side conveying section  22  and the rear side conveying section  24 . 
     The present invention is not limited to this, and the roller conveying section  20  may be structured by only either one conveying section among the front side conveying section  22  and the rear side conveying section  24 . 
     Moreover, the above-described exemplary embodiments describe cases in which the pushing rollers  30  are urged by the pushing spring  38  that is a torsion spring. The present invention is not limited to this, and the pushing rollers  30  may be urged by using any of various mechanisms, such as, for example, a plate spring or the like. 
     Moreover, the above-described exemplary embodiments describe cases in which the guide hole portions  50  are substantially gourd shaped. The present invention is not limited to this, and the guide hole portions  50  may be any of various shapes through which the supporting point shaft  36  can be inserted and that can make the supporting point shaft  36  abut the fit-in upper end surfaces  54 U. 
     Moreover, the above-described exemplary embodiments describe cases in which the supporting point shaft  36  is made to contact the frame  19  along the direction of the reaction force in the upward direction generated by the pushing spring  38  in accordance with the pushing force that arises in the downward direction. 
     The present invention is not limited to this. Pushing force, that is from the downward direction and that runs along a direction that is inclined with respect to the front-rear or the left-right direction, may be applied from the pushing spring  38  to the pushing shafts  32 , and the supporting point shaft  36  may be made to contact the frame  19  along reaction force from the upward direction that is generated in accordance with this pushing force and that is inclined with respect to the front-rear or the left-right direction. 
     Further, the direction of the reaction force, that runs along the direction of the reaction force in the upward direction, may be converted by a predetermined member, and the supporting point shaft  36  may be made to contact the frame  19  from the upward direction at an incline with respect to the front-rear or left-right direction. 
     In short, it suffices for the pushing rollers  30 , the pushing shafts  32 , the pushing spring  38  and the supporting point shaft  36  to be made to be conductive with the frame  19  due to the supporting point shaft  36  being urged by reaction force, that is generated by the pushing spring  38  in accordance with the pushing force that pushes the pushing rollers  30 , and the supporting point shaft  36  being made to contact the frame  19  that holds the upper conveying guide  44 . 
     Moreover, although the above-described exemplary embodiments describe cases in which the pushing rollers  30  are structured of metal, the present invention is not limited to this, and the pushing rollers may be structured of rubber or the like. 
     Moreover, the above-described exemplary embodiments describe cases in which the pushing rollers  30 , the pushing shafts  32 , the pushing spring  38  and the supporting point shaft  36  are structured of metal. The present invention is not limited to this, and these parts may be structured by, for example, insulators whose surfaces are plated with conductive materials. In short, it suffices for there to be electrical conductivity due to surfaces contacting one another. 
     Moreover, the above-described exemplary embodiments describe cases in which the present invention is applied at times of conveying bank notes at the roller conveying section  20  of the bank note processing device  1  that processes cash. 
     The present invention is not limited to this, and may be applied at times when media are conveyed in, for example, an automated teller machine at which media such as cash or the like are inserted and that carries out a desired transaction. 
     Moreover, although the above-described exemplary embodiments describe bank notes that serve as the media, the present invention is not limited to this, and it suffices for there to be thin, paper-sheet-like media such as, for example, gift certificates, cash vouchers, admission tickets, or the like. 
     Moreover, the above-described exemplary embodiments describe cases in which the roller conveying section  20  that serves as the media conveying device is structured by the upper conveying guide  44  that serves as the conveying guide, the frame  19  that serves as the frame, the pushing rollers  30  that serve as the pushing rollers, the pushing spring  38  that serves as the pushing roller urging portion, and the supporting point shaft  36  that serves as the supporting point shaft. 
     The present invention is not limited to this, and the media conveying device may be structured by a conveying guide, a frame, pushing rollers, a pushing roller urging portion and a supporting point shaft of any of various other structures. 
     Moreover, the above-described exemplary embodiments describe cases in which the bank note processing device that serves as the media processing device is structured by the operation section  6  that serves as the operation section, the bank note conveying path  48  that serves as the conveying path, the upper conveying guide  44  that serves as the conveying guide, the frame  19  that serves as the frame, the pushing rollers  30  that serve as the pushing rollers, the pushing spring  38  that serves as the pushing roller urging portion, and the supporting point shaft  36  that serves as the supporting point shaft. 
     The present invention is not limited to this, and the media processing device may be structured by an operation section, a conveying path, a conveying guide, a frame, pushing rollers, a pushing roller urging portion and a supporting point shaft of any of various other structures. 
     The disclosure of Japanese Patent Application No. 2012-274939 is, in its entirety, incorporated by reference into the present specification. 
     All publications, patent applications, and technical standards mentioned in the present specification are incorporated by reference into the present specification to the same extent as if such individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference. 
     INDUSTRIAL APPLICABILITY 
     The present invention may be applied also to various types of devices that conveying paper-sheet-like media such as bank notes or the like.