JP3981377B2 - Image transfer device - Google Patents

Description

  The present invention relates to an image transfer apparatus, and more particularly to an image transfer apparatus for transferring various information such as images and characters to a recording medium such as a card.

  Conventionally, when producing a card-like recording medium such as a credit card, cash card, license card, ID card, etc., the desired image, characters, etc. are recorded by thermal transfer to the recording medium with a thermal head via a thermal transfer film. A thermal transfer printing apparatus is used (see, for example, Patent Document 1). In this thermal transfer system, the technique described in Patent Document 1 is called a direct transfer system because images, characters, and the like are directly transferred to a recording medium via a thermal transfer film, and by using a heat sublimable ink. Although it has an advantage that a high-quality image can be obtained because of excellent gradation expression by ink characteristics, a receiving layer for receiving this ink is essential on the surface of the recording medium to which the image is transferred, so that recording is possible. The medium is limited or a receiving layer needs to be formed on the surface of the recording medium.

  In general, a card made of polyvinyl chloride (so-called PVC card) is widely used as a recording medium capable of accepting heat sublimation ink. However, when a PVC card that has become unnecessary is incinerated, a pollutant is generated. Recently, switching to a polyethylene terephthalate card (so-called PET card) or the like has been studied.

  Furthermore, in an IC card in which an IC chip or an antenna is embedded, such as an IC card whose use range has been expanding in recent years, unevenness is generated on the surface by these elements embedded therein, so that the uneven surface Some drawbacks have been pointed out, such as hindering image transfer to the camera.

  As a thermal transfer type printing apparatus that solves the above-mentioned problems, there is known a technique of a so-called indirect transfer type printing apparatus that once transfers an image to an intermediate transfer medium and then retransfers the image to a transfer target ( For example, see Patent Document 2). According to this method, it is possible to improve the problems such as limitation of the recording medium related to the receiving layer and defects at the time of image transfer to the uneven surface of the recording medium, which were regarded as defects in the direct transfer method, There is an advantage that the entire surface printing on the card-like recording medium can be easily performed as compared with the direct transfer method. In addition, a specific pattern or a hologram film with a specific image is heat-fixed on the surface of a card-like recording medium as an information card manufactured by a printing apparatus as disclosed in Patent Document 1, that is, for the purpose of preventing falsification, that is, 2. Description of the Related Art An overcoat fixing device for a coat film such as a hologram film that is transferred and coated is known (for example, see Patent Document 3).

  Film-like transfer media such as intermediate transfer media used in indirect transfer systems and coat films used in overcoat fixing devices are fed from the supply section side where the film-like transfer media is continuously wound and transported on a predetermined transport path. It is wound up to the winding part side. A transfer unit such as a heat roller is disposed on the conveyance path, and an image or the like formed on the film-like transfer medium is transferred to the recording medium by the transfer unit.

  However, if the transfer process is performed while the film-shaped transfer medium is conveyed to the winding unit side, the heat from the heat roller at the end of the transfer process to the recording medium is not used for the intermediate transfer medium body. Deterioration of wrinkles and alterations due to thermal expansion and contraction is transmitted to unimaged areas and untransferred areas of the coated film, so high-quality and high-quality image transfer processing to card-like recording media can be performed during subsequent transfer processing. The problem of not occurring occurs. This is because when the image transfer operation to the recording medium by the transfer means is performed in the forward transfer operation in the direction of the take-up portion of the film-like transfer medium, the separation point is intended to separate the film-like transfer medium and the recording medium. This is because the unused portion of the film-shaped transfer medium needs to be transported until the unused portion of the film-shaped transfer medium comes into contact with the transfer means during the transport, and deterioration due to thermal shrinkage occurs.

  In order to avoid this problem, if a process that does not use a predetermined area of a film-like transfer medium that has deteriorated is employed, the running cost of the consumables increases, leading to a high production cost of the recording medium. Will occur.

JP-A-9-131930 JP 2000-141727 A Japanese Patent Laid-Open No. 10-71789

  Therefore, in the transfer process of the film-shaped transfer medium, it is possible to prevent deterioration of unused portions and obtain high-quality and high-quality images continuously, and to reduce the running cost. It is the film transfer medium that is transferred for separation by performing the image transfer operation in the reverse direction to the conventional technology and executing it in the return transfer (reverse transfer) operation in the direction of the supply portion of the film transfer medium. It is considered that only the used part is in contact with the transfer means and the unused part is not in contact with the transfer means. Even if the image transfer operation to the recording medium is performed in the reverse conveyance (reverse conveyance) operation in the part direction, the image transfer to the recording medium cannot be reliably performed, and the image transfer process with high image quality and high quality is performed. Can not be obtained, there may lead to damage of the film transfer medium.

  In view of the above circumstances, the present invention improves the reliability of image transfer to a recording medium, can ensure stable conveyance to the separation point of the film-shaped transfer medium after image transfer, It is an object of the present invention to provide an image transfer apparatus capable of preventing damage to a film-like transfer medium due to contact with the film.

In order to solve the above problems, the present invention provides a transfer medium supply unit that supplies a film-shaped transfer medium on which an image is formed, a transfer medium winding unit that winds up the transfer medium, and a heat roller that incorporates a heating element. A transfer means for transferring an image formed on the transfer medium to a recording medium, a holder for holding the heat roller, a recording medium conveyance path for conveying the recording medium, and affixed to the holder. An image transfer device comprising: transfer medium guide means for guiding the transfer medium to an image transfer position of the transfer means; and moving means for moving the heat roller between an image transfer position and a retracted position of the transfer means. an apparatus, as well as disposing the transfer medium guiding means between said transfer means and the transfer medium supplying unit, the transfer medium guide means with the movement of the heat roller by the moving means And it is movable in a direction in contact away with respect to the recording medium conveying path.

The image transfer apparatus of the present invention includes a transfer medium supply unit that supplies a film-like transfer medium on which an image is formed, a transfer medium take-up unit that winds up the transfer medium, and a heat roller that includes a heating element. Transfer means for transferring an image formed on a medium to a recording medium, a holder for holding a heat roller, a recording medium conveyance path for conveying the recording medium, and an image transfer of the transfer means fixed to the holder A transfer medium guiding means for guiding the position to the position; and a moving means for moving the heat roller between the image transfer position and the retracted position of the transfer means . In the present invention, the transfer medium guide means fixed to the holder for holding the heat roller is disposed between the transfer medium supply section and the transfer means, and the transfer medium guide means is recorded along with the movement of the heat roller by the movement means. It is configured to be movable in a direction in which it is separated from and contacting the medium conveyance path. According to the present invention, the transfer medium can be moved in the direction of moving away from or in contact with the recording medium conveyance path by the transfer medium guide means as the heat roller is moved by the moving means. Positioning in the medium conveyance path improves the certainty of transfer to the recording medium, can ensure stable conveyance to the separation site of the transfer medium after image transfer, and also separates the transfer medium from the recording medium conveyance path Thus, it is possible to prevent damage due to contact with the recording medium conveyed on the recording medium conveyance path.

In the present invention, the transfer medium comprises transfer medium transport means capable of transporting the transfer medium in both directions from the transfer medium supply section side to the transfer medium take-up section side and from the transfer medium take-up section side to the transfer medium supply section side. The image formed on the transfer medium may be transferred to the recording medium while the transfer medium is being conveyed from the transfer medium take-up unit side to the transfer medium supply unit side by the transfer medium conveying unit. In this case, the transfer medium guiding means is preferably guide piece der Rukoto to guide to separate the recording medium and the transfer medium on which an image has been transferred by the transfer means. In addition, when the transfer unit transfers the image formed on the transfer medium to the recording medium, it is preferable that the end of the guide piece is positioned in the recording medium conveyance path. In this case, provided with a platen roller which supports the recording medium at the time of image transfer to the recording medium by the heat roller, the moving means is retractable moving the heat roller to the platen roller, and forward and backward movement of the heat roller by the moving means You may make it a guide piece move integrally .

According to the present invention, the transfer medium can be moved in the direction of moving away from or in contact with the recording medium conveyance path by the transfer medium guide means as the heat roller is moved by the moving means. Positioning in the medium conveyance path improves the certainty of transfer to the recording medium, can ensure stable conveyance to the separation site of the transfer medium after image transfer, and also separates the transfer medium from the recording medium conveyance path Thus, it is possible to obtain an effect that damage due to contact with the recording medium conveyed on the recording medium conveyance path can be prevented.

  Embodiments of an image transfer apparatus to which the present invention is applied will be described below with reference to the drawings.

(Constitution)
As shown in FIG. 1, an image transfer apparatus 1 according to this embodiment includes a card conveyance path for forming (transferring) an image on a card C as a recording medium in a housing 2 serving as a housing by an indirect transfer method. A card transport path P. On the card conveyance path P, the card supply unit 3 that separates the cards C one by one and sends them to the card conveyance path P, the cleaner 4 that cleans both sides of the card C on the downstream side of the card supply unit 3, and the downstream of the cleaner 4 On the side, a horizontal transport section 5 for transporting the card C in the horizontal direction is provided.

  The card supply unit 3 has a card stacker that accommodates a plurality of cards C in a stacked manner. A stacker side plate 32 having an opening slot that allows passage of only one card C is disposed at a position facing the card transport path P of the card stacker. A kick roller 31 that presses the card C located at the bottom of the plurality of cards C stacked and accommodated in the stacker to the card transport path P is disposed in pressure contact. The cleaner 4 has a cleaning roller 34 made of a rubber material or the like that is opposed to each other with the card conveying path P interposed therebetween, and a pressure-contact roller 35 that is in pressure contact with the cleaning roller 34. The horizontal transport unit 5 includes a pair of horizontal transport rollers 38, 39, and 11 that are paired so as to be able to hold the card C therebetween. One of these horizontal conveying roller pairs 38, 39, and 11 is a driving roller, and the other is a driven roller.

  The image transfer apparatus 1 is disposed above the card supply unit 3, the cleaner 4 and the horizontal conveyance unit 5, and heats the thermal transfer ink in accordance with the mirror image data sent from the thermal head control unit 19H, so that the intermediate transfer sheet F is applied. An image forming unit 9 for forming an image is provided. The image forming unit 9 adopts a thermal transfer printer configuration, and a platen roller 21 that supports the intermediate transfer sheet F at the time of image formation on the intermediate transfer sheet F, and a thermal that is disposed so as to be movable back and forth with respect to the platen roller 21. A head 20 is provided. A thermal transfer sheet R is interposed between the platen roller 21 and the thermal head 20.

  As shown in FIGS. 7A and 7B, the forward and backward movement of the thermal head 20 relative to the platen roller 21 is performed by a holder (not shown) that detachably holds the thermal head 20 and a driven roller 22 fixed to the holder. A non-circular thermal head advance / retreat cam 23 that rotates in either direction (in the direction of arrow A or the opposite direction) around the cam shaft 24 while being in circumferential contact with the driven roller 22, and a holder are pressed against the thermal head advance / retreat cam 23. This is executed by a thermal head advance / retreat drive unit having a spring (not shown).

  As shown in FIG. 4A, the thermal transfer sheet R has a width slightly larger than the longitudinal length of the card C on the film, for example, Y (yellow), M (magenta), C (cyan), and Bk ( (Black) ink is applied in order, and after Bk (black), the protective layer region T that protects the surface of the card C on which the image is formed has a belt-like shape that is repeated in the surface order. .

As shown in FIGS. 7A and 7B, the thermal transfer sheet R is supplied from a thermal transfer sheet supply unit 14 that is a roll of the thermal transfer sheet R, and is supplied to a plurality of guide rollers 53 and the above-described holder (not shown). The thermal transfer sheet take-up unit 15 is driven by the rotational drive of the take-up roller pair 57 and winds the thermal transfer sheet R in a roll shape while being guided by the fixed guide plate 25 and substantially in contact with the tip of the thermal head 20. Rolled up. The thermal transfer sheet supply unit 14 and the thermal transfer sheet take-up unit 15 are disposed at positions on both sides of the thermal head 20, and the central portions are respectively loaded on the spool shafts. The image forming section 9, the light emitting element and a light receiving element for detecting the position of the Bk of the thermal transfer sheet positioning mark or the thermal transfer sheet R of R (hereinafter, referred to as light-receiving sensor S _1.) The thermal transfer sheet supply Between the two guide rollers 53 disposed between the portion 14 and the thermal head 20, the thermal transfer sheet R is disposed so as to be orthogonal to the thermal transfer sheet R in a separated state. A gear (not shown) is coaxially fitted on the driving side roller shaft of the winding roller pair 57, and this gear meshes with a gear having a clock plate (not shown) coaxially. In the vicinity of the clock plate, an integrated transmission sensor (not shown) for detecting the rotation of the clock plate is disposed in order to manage the amount of winding of the thermal transfer sheet R.

  The printing position (heating position) Sr of the thermal head 20 through the thermal transfer sheet R with respect to the intermediate transfer sheet F is a peripheral portion of the platen roller 21 and extends horizontally from the axis of the platen roller 21 toward the thermal head 20. Corresponds to the intersection with the extended virtual horizon.

As shown in FIGS. 1 and 7A and 7B, the intermediate transfer sheet F is stretched around the platen roller 21 around the thermal head 20 side. As shown in FIG. 4B, the intermediate transfer sheet F protects the base film Fa, the back coat layer Fb formed on the back side of the base film Fa, the receiving layer Fe that receives ink, and the surface of the receiving layer Fe. An overcoat layer Fd that is formed on the surface side of the base film Fa, and a release layer Fc that promotes the peeling from the base film Fa by heating the overcoat layer Fd and the receiving layer Fe as a unit. The base film Fa, the release layer Fc, the overcoat layer Fd, and the receiving layer Fe are laminated in this order. The intermediate transfer sheet F is stretched so that the receiving layer Fe side faces the thermal transfer sheet R and the back coat layer Fb side contacts the platen roller 21. At the printing position Sr, the conveyance speed of the intermediate transfer sheet F when an image is formed on the intermediate transfer sheet (see FIG. 7B) is set to be the same as the conveyance speed of the thermal transfer sheet R. The image forming unit 9 includes a light emitting element and a light receiving element (hereinafter referred to as a light receiving sensor S ₂ ) for detecting a positioning mark on the intermediate transfer sheet F, between the platen roller 21 and the guide roller 91. The intermediate transfer sheet F is arranged so as to be orthogonal to the intermediate transfer sheet F in a separated state.

  As shown in FIG. 1, the image transfer apparatus 1 transfers the image formed on the intermediate transfer sheet F by the image forming unit 9 on the downstream side of the horizontal conveying unit 5 on the card conveying path P to the card C. A transfer unit 10 as means, and a horizontal conveyance discharge unit 12 having a pair of discharge rollers for discharging the card C to the outside of the housing 2 while conveying the card C in the horizontal direction on the downstream side of the transfer unit 10 are provided. Yes.

  The transfer unit 10 includes a platen roller 50 that supports the card C when the intermediate transfer sheet F is transferred to the card C, and a heat roller 45 that is disposed so as to be movable back and forth with respect to the platen roller 50. The heat roller 45 incorporates a heat generating lamp 46 as a heat generating element for heating the intermediate transfer sheet F. An intermediate transfer sheet F is interposed between the platen roller 50 and the heat roller 45.

  As shown in FIGS. 8A and 8B, the forward and backward movement of the heat roller 45 with respect to the platen roller 50 includes a holder 49 that detachably holds the heat roller 45, a driven roller 43 fixed to the holder 49, A non-circular heat roller elevating cam 51 that rotates in one direction (in the direction of arrow B) around the cam shaft 52 while being in circumferential contact with the driven roller 43, and the upper surface of the holder 49 that is built in the holder 49 is pressed against the heat roller elevating cam 51. It is executed by a heat roller raising / lowering drive unit as a moving means having a spring (not shown).

  As shown in FIGS. 1 and 8A, the intermediate transfer sheet F is supplied from an intermediate transfer sheet supply unit 16 that is a roll of the intermediate transfer sheet F, and includes a conveying roller 58 with a driven roller 59, a guide. The roller 60, the platen roller 21, the guide roller 91, and the pinch roller 89 are disposed between the back tension roller 88 that applies reverse tension to the intermediate transfer sheet F, the guide roller 92, the guide roller 44, and the guide roller 44 and the heat roller 45. The guide plate 47, the heat roller 45, and the sheet winding as a guide piece fixed to a frame (holder 49) constituting the transfer unit 10 and guiding the card C and the intermediate transfer sheet F to be separated as will be described later. The transfer unit 1 is disposed between the transfer unit 10 and is fixed to a frame (holder 49) constituting the transfer unit 10 and cooperates with the guide plate 47. Of the auxiliary guide plate 54 to prevent contact with the heat roller 45 of the intermediate transfer sheet F during non-transfer, guided intermediate transfer sheet F to the sheet winding unit 17 for winding into a roll. Also, as shown in FIG. 8B, when the transfer unit 10 transfers, the intermediate transfer sheet F is sandwiched between the platen roller 50 and the heat roller 45 on the card conveyance path P via the card C, and the image is transferred. It is rewound in the direction of arrow E where the forming part 9 is arranged.

As shown in FIG. 1, the transfer unit 10 has a card C in the direction of the arrow L or R in cooperation with a horizontal conveyance roller pair having a capstan roller 156 arranged on the transfer unit 10 side of the horizontal conveyance discharge unit 12. A pair of horizontal transport rollers that use a capstan roller 48 that is in pressure contact with each other across the card transport path P as a driving roller is disposed downstream of the horizontal transport roller pair 11 and upstream of the platen roller 50. Yes. Note that a light emitting element and a light receiving element (hereinafter referred to as a light receiving element S ₃ ) for detecting a positioning mark on the intermediate transfer sheet F are provided between the guide roller 44 and the guide plate 47 in the transfer unit 10. It is arranged so as to straddle the transfer sheet F.

  As shown in FIG. 2, the region defined by the platen roller 21, the card transport path P and the housing 2 shown in FIG. 1 includes a pulse motor M 1 capable of forward / reverse rotation and a pulse motor M 2 capable of forward / reverse rotation. An intermediate transfer sheet conveyance mechanism is provided as a transfer medium conveyance unit that uses as a driving power source. A timing pulley (hereinafter simply referred to as a pulley) 61 is fitted on the motor shaft of the pulse motor M1, and an endless timing belt (hereinafter simply referred to as a belt) 62 is wound around the pulley 63. Yes. A pulley 64 having a smaller diameter than the pulley 63 is fitted on the shaft of the pulley 63.

  A belt 65 is wound around the pulley 64 between the pulley 66. An electromagnetic clutch 67 is fitted on the shaft of the pulley 66. The electromagnetic clutch 67 connects the rotational driving force of the pulley 66 to the pulley 68 fitted to the shaft of the electromagnetic clutch 67 when the thermal head 20 forms an image on the intermediate transfer sheet F. A pulley 70 is coaxially fitted to the platen roller 21, and a belt 69 is wound around the pulley 68 and the pulley 70.

Further, another belt 81 is strung on the pulley 64, and the rotational driving force is transmitted to the pulley 82. A gear 83 that meshes with the gear 84 is fitted on the shaft of the pulley 82. A gear 85 having a smaller diameter than the gear 84 is fitted on the shaft of the gear 84, and the gear 85 meshes with the gear 86. A torque limiter 87 is fitted on the shaft of the gear 86, and the rotational driving force is transmitted to the back tension roller 88 via the torque limiter 87. A pinch roller 89 is pressed against the back tension roller 88. A clock plate 90 is fitted coaxially with the back tension roller 88. When the intermediate transfer sheet F is fed in the forward and reverse directions, the back tension roller 88 rotates in synchronization with the intermediate transfer sheet F. In the vicinity of the clock plate 90, the conveyance amount of the intermediate transfer film F (feed amount, return amount) unit transmission sensor S _A for detecting the rotation amount of the clock plate 90 in order to manage is disposed.

  On the other hand, a pulley 93 is fitted on the motor shaft of the pulse motor M <b> 2, and a belt 94 is wound around the pulley 95. A gear 96 is fitted on the shaft of the pulley 95.

The gear 96 is meshed with a one-way gear 97 that is fitted to a shaft that is transmitted counterclockwise and receives a drive from the gear 96 and is free (clockwise) in the clockwise direction. A gear 98 and a pulley 99 are fitted on the shaft of the one-way gear 97, and the gear 98 meshes with a one-way gear 101 that is free in the clockwise direction and locked in the counterclockwise direction. A belt 102 is wound around the pulley 99 between the pulley 103. A gear 104 is fitted on the shaft of the pulley 103, and the gear 104 meshes with the gear 105. A torque limiter 106 is fitted on the shaft of the gear 105, and the rotational driving force is transmitted to the gear 107 via the torque limiter 106. A clock plate 108 is fitted on the same axis as the gear 107. The gear 107 meshes with a gear 109 fitted to a take-up spool shaft 110 for taking up the intermediate transfer sheet F. In the vicinity of the clock plate 108, the rotation amount of the take-up spool shaft 110 is detected through the rotation of the clock plate 108, and the rotation of the take-up spool shaft 110 is detected to detect a breakage failure of the intermediate transfer sheet F. It is arranged unit transmission sensor S _B.

Further, the gear 96 is engaged with a one-way gear 111 that is fitted to a shaft that is transmitted in the clockwise direction and driven free from the counter-clockwise direction on the opposite side of the one-way gear 97. A gear 112 and a pulley 113 are fitted on the shaft of the one-way gear 111, and the gear 112 meshes with a one-way gear 114 that is free to rotate counterclockwise and locked clockwise. A belt 115 is wound around the pulley 113 between the pulley 116 and the pulley 125. A tension roller 126 is disposed between the pulley 116 and the pulley 125 connected by the belt 115 so that the belt 115 maintains a constant tension. A gear 117 is fitted on the shaft of the pulley 116, and the gear 117 meshes with the gear 118. A torque limiter 119 is fitted on the shaft of the gear 118, and the rotational driving force is transmitted to the gear 123 via the torque limiter 119. A clock plate 121 is fitted coaxially with the gear 123. The gear 123 meshes with a gear 124 fitted to a supply spool shaft 120 for supplying the intermediate transfer sheet F. In the vicinity of the clock plate 121, the rotation of the supply spool shaft 120 is detected through the rotation of the clock plate 121, and the rotation of the supply spool shaft 120 is detected to detect a breakage of the intermediate transfer sheet F. sensor S _C is arranged. The supply spool shaft 120 is loaded with the intermediate transfer sheet supply unit 16, and the winding spool shaft 110 is loaded with the sheet winding unit 17.

  On the other hand, the drive from the pulley 113 is also transmitted to the pulley 125 via the belt 115. A gear 127 is fitted on the shaft of the pulley 125, and the gear 127 meshes with the gear 128. Further, the drive is transmitted to the gear 130 through the gear 129 disposed coaxially with the gear 128. An electromagnetic clutch 131 is fitted on the shaft of the gear 130. The electromagnetic clutch 131 connects the rotational driving force of the gear 130 to the gear 133 through the gear 132 fitted to the shaft of the electromagnetic clutch 131 only when the intermediate transfer sheet F is rewound (Rv). A torque limiter 134 is fitted on the shaft of the gear 133, and the rotational driving force is transmitted to the conveying roller 58 that conveys the intermediate transfer sheet F via the torque limiter 134. Note that the conveyance speed of the intermediate transfer sheet F by the supply spool shaft 120, the platen roller 21, and the conveyance roller 58 when the electromagnetic clutch 131 is connected to the drive has a relationship of supply spool shaft 120> conveyance roller 58> platen 21, and torque. Management is set so that platen 21> conveying roller 58> supply spool shaft 120.

  Feeding (Fw) and rewinding (Rv) of the intermediate transfer sheet F are performed mainly by switching the rotation direction of the pulse motor M2, and to the intermediate transfer sheet F performed in the rewinding (Rv) operation of the intermediate transfer sheet F. When the image is formed, the conveyance speed of the intermediate transfer sheet F by the supply spool shaft 120, the platen roller 21, and the back tension roller 88 has a relationship of supply spool shaft 120> platen roller 21> back tension roller 88. For this reason, when the intermediate transfer sheet F is fed away from the thermal head 20, the driving is disconnected by the electromagnetic clutch 67 in order to prevent the intermediate transfer sheet F from being loosened.

  As shown in FIG. 3, on the card conveyance path P, a card conveyance drive mechanism using a pulse motor M3 capable of forward and reverse rotation as a drive power source is disposed. A pulley 142 is fitted on the motor shaft of the pulse motor M3, and a belt 143 is wound around the pulley 144. A pulley 145 having a smaller diameter than the pulley 144 is fitted on the shaft of the pulley 144, and a belt 146 is wound around the pulley 147. The above-described platen roller 50 and a gear 148 having a smaller diameter than the platen roller 50 are fitted on the shaft of the pulley 147.

  A gear 149 having a diameter larger than that of the gear 148 is engaged with the gear 148, and a gear 150 is engaged with the gear 149. The capstan roller 48 having a diameter larger than that of the gear 150 is fitted on the shaft of the gear 150 as a driving roller, and a horizontal conveying roller pair is configured by being placed in pressure contact with the driven roller on the card conveying path P. Yes. A torque limiter 155 having a diameter larger than that of the capstan roller 48 is fitted to the shaft of the gear 150. The torque limiter 155 is the rear end of the card C (hereinafter, regardless of the horizontal conveyance direction of the card C, the end on the arrow L side shown in FIG. 1 of the card C is called one end, and the end on the arrow R side shown in FIG. In order to ensure good separation (peeling) between the intermediate transfer sheet F and the intermediate transfer sheet F, the speed of the card C is increased when the nip between the heat roller 45 and the platen roller 50 is released. It has a function to make it. A gear 151 is engaged with the gear 150, and a gear 152 is engaged with the gear 151. A driving roller having a diameter larger than that of the gear 152 and constituting the above-described horizontal conveying roller pair 11 is fitted on the shaft of the gear 152, and is arranged in pressure contact with the driven roller on the card conveying path P. The rotational driving force of the pulse motor M3 transmitted to the gear 152 is applied to the driving rollers of the horizontal conveying roller pair 38 and 39 of the horizontal conveying unit 5 and the cleaning roller 34 of the cleaner 4 via a plurality of gears (not shown). Has also been communicated.

  Further, the gear 148 is engaged with a gear 153 having a larger diameter than the gear 148, and the gear 153 is engaged with the gear 154. A pulley 157 having a smaller diameter than the capstan roller 156 and the gear 154 is fitted to the shaft of the gear 154. A belt 158 is hung on the pulley 157, and the other end side of the belt 158 is hung on the pulley 159. A discharge roller 160 for discharging the conveyed card C to the outside of the housing 2 is fitted to the shaft of the pulley 159. The capstan roller 156 and the discharge roller 160 are arranged in pressure contact with the driven roller on the card transport path P, respectively. Between the capstan roller 156 and the discharge roller 160, a roller pair 161 that does not have a drive for correcting a displacement such as a curve of the card C is disposed.

As shown in FIG. 1, a discharge port 27 is formed on the extension line in the arrow L direction of the card transport path P of the housing 2 to discharge the card C that has undergone processing such as printing to the outside of the housing 2. ing. A stacker 13 for stacking and stocking cards C is detachably attached to the housing 2 below the discharge port 27. Incidentally, unit transmission sensor S ₄ between the cleaner 4 and the horizontal transport unit 5 is integrated transmission sensor S ₅ in the horizontal conveying roller pair 11 side in the vicinity of the horizontal conveying roller pair 39, transfer unit 10 and the horizontal conveying The integrated transmission sensor S ₆ is connected to the discharge unit 12, and the integrated transmission sensor S ₇ is arranged on the capstan roller 156 side near the discharge roller 160 in the horizontal transfer unit 12. unit transmission sensor S ₈ are disposed respectively (not shown), one end or the other end of the card C being conveyed along the card transport path P is detected between.

  Further, as shown in FIG. 1, the image transfer apparatus 1 includes a power supply unit 18 that converts a commercial AC power source into a DC power source that can drive / activate each mechanism unit, control unit, etc. 1. Control unit 19 that controls the entire operation, and the state of the image transfer apparatus 1 and the like are displayed on the top of the housing 2 in accordance with information from the control unit 19, and an operation command is instructed to the control unit 19 by an operation by an operator A possible touch panel 8 is provided.

  As shown in FIG. 5, the control unit 19 has a microcomputer 19 </ b> A that performs control processing of the image transfer apparatus 1. The microcomputer 19A includes a CPU that operates with a high-speed clock as a central processing unit, a ROM that stores control operations of the image transfer apparatus 1, a RAM that functions as a work area of the CPU, and an internal bus that connects these.

An external bus 19B is connected to the microcomputer 19A. The external bus 19B includes a touch panel display operation control unit 19C that controls display and operation commands on the touch panel 8, a sensor control unit 19D that controls signals from various sensors, a motor control unit 19E, and a motor that sends drive pulses to each motor. A motor control unit 19E for controlling the driver, an external input / output interface 19F for communicating with an external computer and the image transfer apparatus 1, a buffer memory 19G for temporarily storing image information to be printed on the card C, and a thermal head 20 A thermal head control unit 19H that controls the heat energy of the electromagnetic clutch and a clutch control unit 19J that outputs an on / off control signal for the electromagnetic clutch are connected. The touch panel display operation control unit 19C, the sensor control unit 19D, a thermal head control unit 19H and the clutch control unit 19J includes a touch panel 8, sensors Sa to _Sc, the sensor comprising S 1 to S _8, the driver of the pulse motor M1~M3 The driver, thermal head 20, and electromagnetic clutches 67 and 131 are connected to the driver, thermal head 20, and electromagnetic clutches 67 and 131, respectively.

(Operation)
Next, with reference to a flowchart, the operation of the image transfer apparatus 1 of the present embodiment will be described with the CPU of the microcomputer 19A of the control unit 19 as a main component. It is assumed that image information already received from the external computer via the external input / output interface 19F and the buffer memory 19G is converted into mirror image data and stored in the RAM.

  The CPU displays an initial screen on the touch panel 8 via the touch panel display operation control unit 19C. At this point, the touch panel 8 (or the display screen of the external computer) displays a start button, whether the image transfer apparatus 1 is on standby or printable, the number of printed cards, and the like. When the operator presses the start button, an indirect transfer routine for performing image transfer to the card C by the indirect transfer method is executed.

As shown in FIG. 6, in this indirect transfer routine, first, in step 202, the pulse motors M1 and M2 are rotated in the feed (Fw) direction (direction in which the intermediate transfer sheet F is wound around the sheet winding unit 17). in the next step 204, recognizing the positioning marks formed on the intermediate transfer sheet F by monitoring the light receiving sensor S _2, the intermediate transfer sheet F feed and return the back tension roller always forward and reverse integrally by detecting in unit transmission sensor S _a rotation amount of the clock plate 90 connected to 88, the intermediate transfer sheet F is determined whether or not conveyed to the print start position, when the determination is negative, step Returning to 202, the conveyance of the intermediate transfer sheet F is continued, and if the determination is affirmative, the drive of the pulse motors M1, M2 is stopped in the next step 206. That. During this time, the thermal head 20 is located away from the platen roller 21 (see FIG. 7A), and the thermal transfer sheet R is, for example, a predetermined distance until the start end of Y (yellow) is located at the printing position Sr. Sent (taken up by the thermal transfer sheet take-up unit 15).

  Next, in step 208, the thermal head advancing / retreating drive unit is driven to rotate the thermal head advancing / retreating cam 23 in the direction of arrow A so that the thermal head 20 is pressed against the platen roller 21 via the thermal transfer sheet R and the intermediate transfer sheet F. In Step 270, the pulse motor M1 and the pulse motor M2 are rotated in the rewinding (Rv) direction, and the platen roller 21 is rotated counterclockwise by the coupling of the electromagnetic clutches 67 and 131, and the conveying roller 58 is also rotated counterclockwise. Rotate to As a result, Y (yellow) image formation is started on the intermediate transfer sheet F. That is, by heating the Y (yellow) ink layer of the thermal transfer sheet R with the thermal head 20, image formation with a mirror image is started on the receiving layer Fe of the intermediate transfer sheet F, and the platen roller 21 is driven by the driving force of the pulse motor M1. By rotating counterclockwise, the intermediate transfer sheet F is wound around the intermediate transfer sheet supply unit 16 by the driving force of the pulse motor M2, and the thermal transfer sheet R is wound around the thermal transfer sheet winding unit 15 in synchronization. Note that mirror image data (thermal energy data given to the thermal head 20 at the time of image formation) stored in the RAM is sent to the thermal head 20 in advance via the thermal head control unit 19H, and each printing element of the thermal head 20 is transmitted. Is heated according to this mirror image data.

  In the next step 212, it is determined whether or not the pulse motor M1 (or pulse motor M2) having a predetermined number of pulses corresponding to the size in the longitudinal direction of the image formed on the intermediate transfer sheet F is rotated. It is determined whether or not the image formation on the transfer sheet F has been completed. If the determination is negative, the process returns to step 210 to continue image formation on the intermediate transfer sheet F. If the determination is affirmative, in the next step 214, the driving of the pulse motors M1 and M2 is stopped and the electromagnetic clutch 67, In 131, the connection to the platen roller 21 and the transport roller 58 is released.

  Next, at step 216, the thermal head advancing / retreating cam 23 is rotated by driving the thermal head advancing / retreating drive unit to retract the thermal head 20 with respect to the platen roller 21, and at the next step 218, an image for a predetermined color (YMC). It is determined whether or not the formation has been completed. In the case of negative determination, the process returns to step 202 in order to form an image by superimposing the next color (for example, M) on the color (for example, Y) already formed on the receiving layer Fe of the intermediate transfer sheet F. When the image formation by YMC is completed, the process proceeds to the next step 220.

In step 220, the pulse motor M2 is rotated in the feed direction so that the rear end of the image area formed on the intermediate transfer sheet F by the image forming unit 9 beyond the position of the heat roller 45 that is previously separated from the platen roller 50. The back tension roller (hereinafter, the end of the image area located on the image forming unit 9 side regardless of the conveyance direction of the intermediate transfer sheet F is referred to as the rear end) passes through the front end of the auxiliary guide plate 54 to a predetermined position. The intermediate transfer sheet F is conveyed according to the amount of rotation of the clock plate connected to 88, and the drive of the pulse motor M2 is stopped. At this time, the leading edge of the image area of the intermediate transfer sheet F (hereinafter, the edge of the image area located on the sheet winding section 17 side regardless of the conveyance direction of the intermediate transfer sheet F is referred to as the leading edge). It is wound on the part 17. Positioning marks of the intermediate transfer sheet F by monitoring the output from the arranged light receiving sensor S ₃ between the guide roller 44 and the guide plate 47 to the transfer unit 10 at the time of conveyance of the intermediate transfer sheet F is detected At this time, the conveyance amount can be set again, and the conveyance accuracy is improved.

In step 220, in parallel with the conveyance of the intermediate transfer sheet F to the sheet winding unit 17, the card C is sent out from the card supply unit 3, and a pair of horizontal conveyance rollers having capstan rollers 156 at both ends of the card C. And a discharge roller 160 and a driven roller pressed against the discharge roller 160, and conveyed along the card conveyance path P. That is, by driving the card supply unit 3 and the pulse motor M3, one card C is sent from the supply unit 3 onto the card transport path P, and both sides are cleaned by the cleaner 4, and one end of the card C is the cleaner 4 And an unillustrated integrated transmission sensor S ₄ disposed between the horizontal conveyance unit 5 and the horizontal conveyance unit 5, the rotation of the kick roller 31 is stopped, and the card C passes through the horizontal conveyance unit 5 and the transfer unit 10. It is further conveyed along the card conveyance path P in the direction of arrow L. When an integral transmission sensor S _{7 (} not shown) arranged on the capstan roller 156 side in the vicinity of the discharge roller 160 detects one end of the card C, the card C is further conveyed in the direction of the arrow L by moving the card C in the direction of the arrow L3. The rotation drive of is stopped. As a result, one end of the card C is sandwiched between the discharge roller 160 and the driven roller in pressure contact, and the other end is sandwiched between the pair of horizontal transport rollers having the capstan roller 156.

In the next step 222, the pulse motor M2 is rotated in the rewinding direction so that the rear end of the image area of the intermediate transfer sheet F is at the transfer start position (as shown in FIGS. 9A and 9B), the heat roller 45 In the return direction (the direction of arrow E in FIG. 9A) on the image forming unit 9 side to the position corresponding to the virtual vertical line from the center of the heat roller 45 when it descends to the position perpendicular to the card transport path P. Then, the driving of the pulse motor M2 is stopped. In the state of step 222, as shown in FIG. 8A, the heat roller 45 is located at the retracted position retracted from the platen roller 50. Further, even when the conveyance of the image forming section 9 side of the intermediate transfer sheet F, positioning marks of the intermediate transfer sheet F is detected by monitoring the output from the light receiving sensor S ₃ described above, the conveyance amount again By setting, the conveyance accuracy can be improved.

In step 222, in parallel with the conveyance of the intermediate transfer sheet F to the image forming unit 9, the card is sandwiched between a pair of horizontal conveyance rollers having a discharge roller 160 and a driven roller and a capstan roller 156 in pressure contact at both ends. C is conveyed to the image forming position. In other words, the pulse motor M3 is driven in reverse, the card C sandwiched at both ends is transported on the card transport path P in the direction of arrow R, and the other end of the card C is between the transfer section 10 and the horizontal transport discharge section 12. is conveyed further direction of arrow R the predetermined number of pulses card C after being detected by stopping the reverse rotation of the pulse motor M3 in unit transmission sensor S ₆ (not shown) arranged, an image forming the other end of the card C Transport to a position corresponding to the position.

Next, in step 224, the heat roller raising / lowering drive unit is driven to rotate the heat roller raising / lowering cam 51 in the direction of arrow B, so that the heat roller 45 is moved from the retracted position on the card conveyance path P on the intermediate transfer sheet F and the card C. Then, it is lowered to the image transfer position that contacts the platen roller 50, and the drive of the heat roller raising / lowering drive unit is stopped. At this time, the guide plate 47 and the auxiliary guide plate 54 fixed to the frame (holder 49) constituting the transfer unit 10 are positioned on the card transport path P or below the card transport path P, and the card C the at the other end bottom side is supported by the platen roller 50, the rear end of the image area F ₁ of the intermediate transfer sheet F is in contact with the other end of the card C is pressed against the upper side to the heat roller 45 (FIG. 9 (a ) State).

In the next step 226, is rotated in the unwinding direction the pulse motor M2, the pulse motor M3 by reverse rotation is, on the image transfer surface side of the card C, and mirror image area F ₁ of the intermediate transfer sheet F heat roller Indirect transfer, in which heat transfer is performed at 45, is executed. The operation in step 226 will be described in detail. The card C is supported by the platen roller 50 whose bottom side rotates counterclockwise, the image transfer surface side is pressed against the heat roller 45 via the intermediate transfer sheet F, and the arrow C It is conveyed in the R direction. The peeling layer Fc of the image area F ₁ guided in the substantially horizontal direction along the card conveying path P by the guide plate 47 and the auxiliary guide plate 54 is peeled off from the base film Fa by the heat from the heating lamp 46, and the image area F _1. The receiving layer Fe and the overcoat layer Fd are integrally transferred to the card C (the state shown in FIG. 8B). At the time of transfer, the conveyance speed of the card C and the intermediate transfer sheet F is set to be the same, and the intermediate transfer sheet F is rewound to the intermediate transfer sheet supply unit 16 by the rotation of the pulse motor M2 in the rewind direction. During this time, in step 228, by monitoring whether the detected in unit transmission sensor S _5, not shown other end of the card C is placed in a horizontal conveying roller pair 11 side in the vicinity of the horizontal conveying rollers 39, an intermediate transfer It is determined whether or not the separation of the sheet F and the card C by the guide plate 47 has been completed. That is, the intermediate transfer sheet F and the card C is, FIG. 9 (A), the from the start of transcription of (B), the FIG. 9 (C), the shown (D), the transfer of the image area _{F 1} of the card C After the completion of the transfer completion position, the sheet is further conveyed in the direction of arrow E and arrow R for separation of the intermediate transfer sheet F and the card C (hereinafter referred to as separation conveyance), and FIGS. as shown in), or separation of the one end of the tip and the card C in the image area of the intermediate transfer sheet F is positioned to complete the separation completion position, the other end of the card C at the unit transmission sensor S ₅ Judgment by detection. If the determination is negative, the process returns to step 226 to continue the transfer. If the determination is affirmative, in order to promote the separation of the intermediate transfer sheet F and the card C by the torque limiter 155 described above, the intermediate transfer sheet F and the card C are transferred. Are further carried by a predetermined number of pulses in the directions of arrow E and R (not shown in FIG. 6).

Next, in step 230, the driving of the pulse motors M2 and M3 is stopped to end the conveyance of the intermediate transfer sheet F and the card C at the time of transfer / separation, and the heat roller elevating drive unit 51 is driven to drive the heat roller elevating cam 51. Is rotated again to position (raise) the heat roller 45 in the retracted position with respect to the platen roller 50. In the next step 232, the pulse motor M3 is rotationally driven to further convey the card C along the card conveyance path P in the direction of the arrow L. In step 232, the card C is disposed between the horizontal conveyance discharge unit 12 and the discharge port 27. has been integrated transmission sensor S ₈ (not shown) determines whether it has detected one edge of the card C, when the determination is negative, the process returns to step 232 to further transport the card C, when the determination is affirmative In step 236, the card C is continuously conveyed after waiting for a predetermined time. As a result, the card C is discharged to the stacker 13 through the discharge port 27. In the next step 238, the driving of the pulse motor M3 is stopped, and the number of processed cards and the completion of processing are displayed on the touch panel 8.

In the next step 240 to step 244, in preparation for processing to a new card C, the unused portion F ₀ (see FIG. 9F) adjacent to the image area F1 of the intermediate transfer sheet F is imaged. And the indirect transfer routine is completed. That is, in step 240, the pulse motor M1, M2 causes a reverse rotation driven, determined by detecting at a predetermined distance transport was whether the above-described unit transmission sensor S _A in the next step 240, When the determination is negative the transport to the vicinity of the image forming portion 9 of the unused portion F ₀ of the intermediate transfer sheet F returns to step 240 to continue, the next step 244 stops driving of the pulse motor M1, M2 when the determination is affirmative.

(Action etc.)
Next, the operation and the like of the image transfer apparatus 1 of the present embodiment will be described.

As described above, in the image transfer apparatus 1 of the present embodiment, the intermediate transfer sheet F is conveyed in the direction of arrow E, which is the rewind direction to the image forming unit 9, and the card C is conveyed in the direction of arrow R during transfer / separation. (See FIGS. 9A to 9F). Therefore, after the transfer is completed (see FIGS. 9C and 9D), the separation transfer for separating the intermediate transfer sheet F and the card C is performed from the heat roller 45 to the guide plate 47 ( Figure 9 (E), (F) refer), the separating and conveying region F ₃ on the intermediate transfer sheet F to the separation conveyance is performed, since the direction of the separation conveyance of the arrow E direction, the spent portion of the intermediate transfer sheet F belonging to the used part F ₂ is. On the other hand, as shown in FIGS. 10A to 10F, when the intermediate transfer sheet F and the card C are conveyed in the direction opposite to the present embodiment in the direction of the arrow E ′ and the direction of the arrow L according to the conventional technique, separating and conveying region F ₃ on the transfer sheet F, since the separation conveyance direction of the intermediate transfer sheet F is the arrow E 'direction and belong to unused portion F ₀ of the intermediate transfer sheet F (Fig. 10 (F) see ). Thus, in the conveying direction of the conventional image transfer apparatus, wrinkles due to heat is transferred thermal expansion and contraction of the heat roller 45 to the separating and conveying region F ₃ belonging to the unused portion F _0, than deterioration of the alteration or the like occurs, on subsequent transfer process Although the image transfer processing with high image quality and high quality to the card C cannot be performed, or the quality can be maintained in the image transfer processing by not using the separation conveyance region F ₃ belonging to the deteriorated unused portion F ₀ , since unusable portion of the unused portion F ₀ is generated, can not be used well intermediate transfer sheet F efficiency, results causes an increase in manufacturing cost per C1 cards as. As described above, the image transfer apparatus 1 of this embodiment, the intermediate transfer direction of conveyance of the sheet F is the direction of arrow E separating and conveying region F ₃ for that belongs to the used portion F _2, unused portion F ₀ Since there is no deterioration due to contact with the heat roller 45, continuous image transfer processing with high image quality and high quality can be performed, and the running cost of the intermediate transfer sheet F, which is a consumable item, can be reduced. 10, (A) and (B) are shown in FIGS. 9 (A) and (B), and (C) and (D) are shown in FIGS. 9 (C) and (D), and (E) and (F). ) Corresponds to FIGS. 9E and 9F, respectively.

Further, in the image transfer apparatus 1 of the present embodiment, the guide plate 47 fixed to the frame (holder 49) constituting the transfer unit 10 is moved to the card transport path P together with the heat roller 45 by driving the heat roller lifting / lowering drive unit. It can be moved in the direction of separating from and contacting. Since the front end portion of the guide plate 47 is positioned on the card conveyance path P or below the card conveyance path P when the heat roller 45 is lowered, the intermediate transfer sheet cooperates with the auxiliary guide plate 54 at the time of transfer. F is surface contact with the card C in the card transport path P, and is secured transferred to the card C in the image region F ₀ by the heat roller 45, when the separation conveyed, the intermediate transfer sheet F in cooperation with the auxiliary guide plate 54 It is possible to stably convey along the card conveying path P, and at the time of separation, an angle is set so that the card C conveyed in the horizontal direction and the intermediate transfer sheet F conveyed in the arrow E direction can be separated. Since it gives, separation of both can be secured. At the time of the separation, the separation between the intermediate transfer sheet F and the card C is further promoted by the cooperation with the torque limiter 155. Further, when the heat roller 45 is located at the retracted position, the intermediate transfer sheet F is separated from the card transport path P, so that damage due to contact with the card C transported on the card transport path P can be prevented.

In the present embodiment, an example in which an arbitrary image is formed by the image forming unit 9 on the intermediate transfer sheet F supplied from the intermediate transfer sheet supply unit 16 and the image is transferred to the card C by the transfer unit 10 is shown. However, the present invention can also be applied to a hologram sheet or the like on which a specific pattern or a specific image is formed in advance. For example, as shown in FIG. 11, the image transfer apparatus 1 ′ includes a hologram sheet supply unit 29 in addition to the intermediate transfer sheet supply unit 16, and the hologram sheet H is disposed on both sides of the transfer unit 10 via guide rollers. Are guided by the guide plate 47 and the auxiliary guide plate 54 disposed on the sheet take-up portion 17 and taken up by the sheet take-up portion 17. When the intermediate transfer sheet F is used, the hologram sheet H is completely rewound onto the hologram sheet supply unit 29, and when the hologram sheet H is used, the intermediate transfer sheet F is used as the intermediate transfer sheet F. Is completely rewound. The sheet winding unit 17 winds either the intermediate transfer sheet F or the hologram sheet H, so that any one sheet is used. The CPU, by monitoring the platen roller 21 and the guide roller 91 light-receiving sensor S ₂ disposed between, it is determined whether the intermediate transfer sheet F is used. As with the intermediate transfer sheet F described above, the hologram sheet H is transferred in the direction of being rewound to the hologram sheet supply unit 29 side. The image transfer apparatus 1 ′ can achieve the same effects as described above for the hologram sheet H. In FIG. 11, the same members as those in the image transfer apparatus 1 shown in FIG. Therefore, the term “transfer medium supply unit” of the present invention is an upstream mechanism unit that supplies the transfer unit 10 with the intermediate transfer sheet F or the hologram sheet H on which an image is formed, according to the above embodiment. Means.

  In the present embodiment, as shown in FIG. 8A, the length of the auxiliary guide plate 54 is the same as the length of the guide plate 47, and the intermediate transfer sheet F is transferred to the card transport path P at the retracted position of the heat roller 45. However, the function of the auxiliary guide plate 54 is to prevent the intermediate transfer sheet F from contacting the card C and the intermediate transfer medium F at the retracted position. It is not necessary to be the same, and may be short.

  The present invention improves the certainty of image transfer to a recording medium, can ensure stable conveyance to the separation point of the film-shaped transfer medium after image transfer, and is a film by contact with the conveyed recording medium Therefore, the present invention has industrial applicability because it provides an image transfer apparatus that can prevent damage to the transfer medium.

1 is a side view illustrating a schematic configuration of an image transfer apparatus according to an embodiment to which the present invention is applicable. It is a side view showing an intermediate transfer sheet conveyance mechanism of the image transfer apparatus of the embodiment. It is a side view showing a card conveyance mechanism in the vicinity of a transfer portion of the image transfer apparatus of the embodiment. It is explanatory drawing of a thermal transfer sheet and an intermediate transfer sheet, (A) is a front view which shows typically a thermal transfer sheet, (B) is sectional drawing which shows an intermediate transfer sheet typically. FIG. 2 is a block diagram illustrating a schematic configuration of a control unit of the image transfer apparatus according to the embodiment. 5 is a flowchart of an indirect transfer routine executed by a CPU of a control unit of the image transfer apparatus according to the embodiment. 4A and 4B are side views of an image forming unit of the image transfer apparatus according to the embodiment, in which FIG. 5A illustrates a state in which the thermal head is retracted, and FIG. 4A and 4B are side views of a transfer unit of the image transfer apparatus according to the embodiment, in which FIG. 5A illustrates a state where the heat roller is positioned at a retracted position, and FIG. 4A is a side view of the vicinity of the heat roller of the transfer unit of the image transfer apparatus according to the embodiment and a plan view of the intermediate transfer sheet. FIG. 5A corresponds to the state where the card is positioned at the transfer start position, and FIG. The position of the intermediate transfer sheet, (C) is the state where the card is located at the transfer completion position, (D) is the position of the intermediate transfer sheet corresponding to (C), (E) is the separation of the intermediate transfer sheet and the card is completed (F) shows the position of the intermediate transfer sheet corresponding to (E). FIG. 5A is a side view of the transfer unit and the vicinity of the heat roller when the conveyance of the intermediate transfer sheet and the card is conveyed in the direction opposite to that of the embodiment according to the prior art and a plan view of the intermediate transfer sheet. (B) is the position of the intermediate transfer sheet corresponding to (A), (C) is the state where the card is positioned at the transfer completion position, and (D) is the position of the intermediate transfer sheet corresponding to (C). , (E) shows a state where the separation between the intermediate transfer sheet and the card is completed, and (F) shows the position of the intermediate transfer sheet corresponding to (E). It is a side view which shows schematic structure of the image transfer apparatus of other embodiment which can apply this invention.

Explanation of symbols

1 Image transfer device 10 Transfer section (transfer means)
16 Intermediate transfer sheet supply part (part of transfer medium supply part)
17 Intermediate transfer sheet take-up part (transfer medium take-up part)
45 Heat roller 46 Heating lamp (heating element)
47 Guide plate ( transfer medium guide means, guide piece)
50 Platen roller 51 Heat roller lifting cam (part of moving means)
F Intermediate transfer sheet (film transfer medium)
M2 pulse motor (part of transfer medium transport means)
P card transport path (recording medium transport path)

Claims (5)

A transfer medium supply unit for supplying a film-like transfer medium on which an image is formed;
A transfer medium winding unit for winding the transfer medium;
A transfer unit having a heat roller with a built-in heating element, and transferring an image formed on the transfer medium to a recording medium;
A holder for holding the heat roller;
A recording medium conveyance path for conveying the recording medium;
A transfer medium guide means fixed to the holder and guiding the transfer medium to an image transfer position of the transfer means;
Moving means for moving the heat roller between an image transfer position and a retracted position of the transfer means;
In an image transfer apparatus comprising:
The transfer medium guide means is disposed between the transfer medium supply section and the transfer means, and the transfer medium guide means is separated from the recording medium conveyance path as the heat roller is moved by the moving means. An image transfer apparatus configured to be movable in a contact direction. The transfer medium, a transfer medium conveying means can be conveyed from the transfer medium supply side in both of the transfer medium supply portion side from the transfer medium winding end side and the transfer medium take-up unit side, the transfer unit Is configured to transfer an image formed on the transfer medium onto the recording medium while the transfer medium is being conveyed from the transfer medium winding unit side to the transfer medium supply unit side by the transfer medium conveying unit. The image transfer apparatus according to claim 1 . The transfer medium guiding means, image transfer apparatus according to claim 2, wherein a guide piece der Rukoto the image by said transfer means is guided for separating the transfer medium and the recording medium which has been transferred . 4. The image transfer according to claim 3 , wherein when the transfer unit transfers an image formed on the transfer medium to the recording medium, an end portion of the guide piece is positioned in the recording medium conveyance path. 5. apparatus. Wherein comprising a platen roller for supporting said recording medium by the heat roller during image transfer to the recording medium, the moving means moves the retractable said heat roller to said platen roller, the heat roller by the moving means The image transfer apparatus according to claim 4 , wherein the guide piece moves integrally with the forward / backward movement of the image forming apparatus.

Images