JP4569811B2 - Recording medium coating apparatus - Google Patents

Description

  The present invention relates to a recording medium coating apparatus for coating a surface of a recording medium with a coating layer.

  In order to maintain the image quality such as a color image recorded on the recording medium, and to ensure the water resistance and strength of the recording medium, there is a recording medium coating apparatus that coats the surface of the recording medium with a coating layer. In this recording medium coating apparatus, first, a long recording medium (recording paper) is conveyed at a constant speed, and the laminate material (coating material) is peeled off on the mount so as to face the recording surface of the recording medium. A covering sheet between a covering sheet supply means that holds the laminate sheet (covering sheet) that is formed and rollable so as to be able to supply and a mount recovery means that winds and collects the peeled backing sheet in a roll shape Feed and transport. At that time, the laminate material is continuously transferred onto the recording surface of the recording medium by applying heat and pressure in a state where the recording medium and the laminate sheet are laminated by the pressure roller pair. Thereafter, only the backing sheet of the laminate sheet is peeled off, and a laminate process is performed on the recording surface of the recording medium. Then, the recording medium subjected to the lamination is sequentially cut by the cutter at the cuts of the image formed on the recording surface, and discharged in a state of being separated for each image (for example, see Patent Document 1).

JP 58-22479A

In the conventional recording paper coating apparatus, since the tension applied to the coating sheet is not considered to change due to the change in the winding diameter of the backing paper in the backing paper collecting means, the tension of the coating sheet being transported is not considered. There is a problem that the recording sheet may not be properly coated due to twisting or distortion of the coating sheet due to the fluctuation.
In addition, in the case where an auxiliary sheet conveyed opposite to the covering sheet is provided and a recording medium is supplied between the covering sheet conveyed opposite to the auxiliary sheet and the auxiliary sheet, Due to the twist and distortion, there is a problem that the recording medium cannot be properly coated.

  In the case where the recording medium is supplied between the covering sheet and the auxiliary sheet, the recording medium is supplied so as to be sandwiched between the covering sheet and the auxiliary sheet. In some cases, the step of peeling the base material and the step of peeling the auxiliary sheet are performed at different points during the conveyance of the recording medium. At that time, if the tension of the covering sheet and the auxiliary sheet is different from each other, the tension applied to the recording medium when one of them is peeled is offset, which may cause further twisting and distortion to the recording medium. Become.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a recording medium coating apparatus capable of appropriately coating a recording medium.

In order to achieve the above object, the first characteristic configuration of the recording medium coating apparatus according to the present invention is formed to be peelable on one surface of the base material as a coating layer material to be attached to the base material and the recording medium. The coated transfer layer is provided and is wound in a roll shape so that the coated sheet can be supplied to the coated sheet supply means. The coated sheet supply means and the base material of the coated sheet are wound up and collected in a roll shape. A covering sheet transporting means for transporting between the substrate collecting means and the covering sheet held so as to be able to be supplied to the auxiliary sheet supplying means in a rolled state, the auxiliary sheet supplying means and the auxiliary sheet being an auxiliary sheet transport means for feeding transportable at the same speed as the cover sheet so as to face the covering sheet between the auxiliary sheet recovery means for winding collected into a roll, said coating being conveyed opposite each other A recording medium feeding means for supplying the recording medium between the over bets and the auxiliary sheet, and crimping means for crimping interposed therebetween and the cover sheet facing the auxiliary sheet between said recording medium, said cover sheet By controlling the substrate winding torque by the substrate collecting means and the auxiliary sheet winding torque by the auxiliary sheet collecting means so as to keep the tension and the auxiliary sheet tension within a predetermined set range, respectively, the covering sheet The covering sheet conveying means that keeps the covering sheet tension given to the covering sheet by the conveying means and the auxiliary sheet tension given to the auxiliary sheet by the auxiliary sheet conveying means within a predetermined setting range, respectively. And tension control means for controlling the auxiliary sheet conveying means.

According to the first characteristic configuration, the tension control means winds the base material of the covering sheet in a roll shape by the base material collecting means so that the covering sheet tension and the auxiliary sheet tension are kept within the predetermined setting ranges, respectively. The covering sheet applied to the covering sheet by the covering sheet conveying means by controlling the winding torque of the base material and the auxiliary sheet winding torque when the auxiliary sheet is wound into a roll by the auxiliary sheet collecting means tension and, since that Tsu coercive an auxiliary sheet tension is given to the auxiliary sheet to each within the predetermined setting range by the auxiliary sheet transport means, Ya twist to the coated sheet and the auxiliary sheet is conveyed while sandwiching the recording medium Distortion will not occur. As a result, it is ensured that the cover sheet and the auxiliary sheet are not twisted or distorted when the recording medium is coated, and a recording medium coating apparatus capable of appropriately covering the recording medium is provided. Become.
In addition, even if the step of peeling the base material of the covering sheet from the recording medium and the step of peeling the auxiliary sheet are performed at different points during the conveyance of the recording medium, the tension applied to the recording medium when any of them is peeled Does not change, so that the recording medium is not twisted or distorted.

A second characteristic configuration of the recording medium coating apparatus according to the present invention includes: a substrate winding diameter detection unit that directly or indirectly detects the winding diameter of the substrate in the substrate recovery unit; and the auxiliary sheet. Auxiliary sheet winding diameter detecting means for directly or indirectly detecting the winding diameter of the auxiliary sheet in the recovery means, and the tension control means is configured to control the base material according to the winding diameter of the base material. The winding torque is controlled, and the auxiliary sheet winding torque is controlled according to the winding diameter of the auxiliary sheet.

According to the second characteristic configuration, the tension control means controls the substrate winding torque in accordance with the winding diameter of the substrate so as to keep the covering sheet tension and the auxiliary sheet tension within the predetermined setting ranges, respectively. Then, the coating sheet tension applied to the conveyed coating sheet is controlled, and the auxiliary sheet winding torque is controlled according to the winding diameter of the auxiliary sheet, and applied to the conveyed auxiliary sheet. By controlling the auxiliary sheet tension being applied, even if the winding diameter of the substrate changes as the winding of the covering sheet by the substrate collecting means proceeds, and the auxiliary sheet by the auxiliary sheet collecting means Even if the winding diameter of the auxiliary sheet changes as the winding progresses, the coating sheet tension applied to the coating sheet by the base material collecting means and the auxiliary sheet collected by the auxiliary sheet collecting means Auxiliary sheet tension is to be properly adjusted, respectively that. As a result, the cover sheet and the auxiliary sheet conveyed while sandwiching the recording medium are prevented from being twisted or distorted, and the contact state between the recording medium and the cover sheet and the contact state between the recording medium and the auxiliary sheet are set. In substantially the same manner, the recording medium can be properly coated.

According to a third characteristic configuration of the recording medium coating apparatus according to the present invention, the tension control unit covers the coating sheet by the coating sheet supply unit so that the coating sheet tension and the auxiliary sheet tension are kept within a predetermined setting range, respectively. The auxiliary sheet supply resistance is controlled by the sheet supply resistance and the auxiliary sheet supply means.

According to the third characteristic configuration, the tension control means controls the covering sheet supply resistance by the covering sheet supply means so as to keep the covering sheet tension and the auxiliary sheet tension within the predetermined setting ranges, respectively. The sheet is fed while adjusting the feeding amount, and is fed while adjusting the feeding amount of the auxiliary sheet by controlling the auxiliary sheet feeding resistance by the auxiliary sheet feeding means, so that the recording medium is sandwiched and conveyed. It is possible to appropriately cover the recording medium so that the covering sheet and the auxiliary sheet are not twisted or distorted.

A fourth characteristic configuration of the recording medium coating apparatus according to the present invention is a recording medium coating apparatus that coats the surface of the recording medium with a coating layer, as a base material and a coating layer material attached to the recording medium. A transfer layer formed so as to be peelable is provided on one surface of the base material, and the cover sheet held so as to be supplied to the cover sheet supply means in a state of being wound in a roll shape, the cover sheet supply means and the cover sheet Cover sheet transporting means for transporting the base material of the cover sheet to a base material recovery means for winding and collecting the base material in a roll shape, and the cover sheet held so as to be supplied to the auxiliary sheet supply means while being wound in a roll shape Between the auxiliary sheet supply means and the auxiliary sheet collecting means for winding and collecting the auxiliary sheet in a roll shape, and facing the covering sheet, and conveying the auxiliary sheet at the same speed as the covering sheet A recording medium supplying means for supplying the recording medium between the covering sheet and the auxiliary sheet conveyed opposite to each other, and the covering sheet and the auxiliary sheet facing each other with the recording medium interposed therebetween. The crimping means for crimping, and the covering sheet supply resistance by the covering sheet supply means and the auxiliary sheet supply resistance by the auxiliary sheet supply means are controlled so as to keep the covering sheet tension and the auxiliary sheet tension within predetermined setting ranges, respectively. By doing so, the covering sheet tension applied to the covering sheet by the covering sheet conveying means and the auxiliary sheet tension applied to the auxiliary sheet by the auxiliary sheet conveying means are each kept within a predetermined setting range. And a tension control means for controlling the covering sheet conveying means and the auxiliary sheet conveying means. A.

According to the fourth characteristic configuration, the tension control means controls the covering sheet supply resistance by the covering sheet supply means so as to keep the covering sheet tension and the auxiliary sheet tension within the predetermined setting ranges, respectively. The sheet is fed while adjusting the feeding amount, and is fed while adjusting the feeding amount of the auxiliary sheet by controlling the auxiliary sheet feeding resistance by the auxiliary sheet feeding means, so that the recording medium is sandwiched and conveyed. It is possible to appropriately cover the recording medium so that the covering sheet and the auxiliary sheet are not twisted or distorted.

A fifth characteristic configuration of the recording medium coating apparatus according to the present invention includes: a coated sheet remaining winding diameter detecting unit that detects a remaining winding diameter of the coated sheet in the coated sheet supplying unit; and the auxiliary sheet in the auxiliary sheet supplying unit. Auxiliary sheet winding remaining diameter detecting means for detecting the remaining winding diameter of the auxiliary sheet, wherein the tension control means controls the covering sheet supply resistance in accordance with the remaining winding diameter of the covering sheet, and the remaining winding of the auxiliary sheet The auxiliary sheet supply resistance is controlled according to the diameter.

According to the fifth characteristic configuration, the tension control means controls the covering sheet supply resistance by the covering sheet supply means so as to keep the covering sheet tension and the auxiliary sheet tension within the predetermined setting ranges, respectively. The sheet is fed while adjusting the feeding amount, and is fed while adjusting the feeding amount of the auxiliary sheet by controlling the auxiliary sheet feeding resistance by the auxiliary sheet feeding means, so that the recording medium is sandwiched and conveyed. It is possible to appropriately cover the recording medium so that the covering sheet and the auxiliary sheet are not twisted or distorted.

According to a sixth characteristic configuration of the recording medium coating apparatus according to the present invention, the coating sheet tension setting range and the auxiliary sheet tension setting range are such that the elongation of the coating sheet and the auxiliary sheet is substantially the same. It is in the point to be set.

According to the sixth characteristic configuration, the tension control means includes the covering sheet conveying means and the auxiliary sheet tension so that the covering sheet tension setting range and the auxiliary sheet tension setting range are substantially equal to each other. By controlling the sheet conveying means, it is possible to appropriately cover the recording medium so that the covering sheet and the auxiliary sheet conveyed opposite to each other with the recording medium interposed therebetween are not twisted or distorted.

The recording medium coating apparatus of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a state in which the coating apparatus according to the present embodiment is housed in a casing, and FIG. 2 is a cross-sectional view of the coating apparatus according to the present embodiment cut near the center in the width direction.

As shown in FIG. 1 and FIG. 2, in the recording medium coating apparatus of the present invention, the recording paper A is supplied into the apparatus main body along the supply tray 1 and the supply guide 2 continuous thereto, Then, while being transported along a transport path L provided in a substantially horizontal direction, a coating layer F is formed on the surface thereof, and is discharged to a discharge tray 4 by a discharge mechanism 3 described later. At this time, the recording paper A is conveyed with the recording surface on which the image is recorded facing upward, and the coating apparatus is configured to form a coating layer F on the recording surface.
Therefore, in the present embodiment, the recording paper A constitutes the “recording medium” in the present invention, and the supply tray 1 and the supply guide 2 constitute the “recording medium supply unit” in the present invention.

In the apparatus main body of the coating apparatus, a coating sheet conveyance mechanism 6 that conveys the coating sheet B, an auxiliary sheet conveyance mechanism 7 that conveys the auxiliary sheet E, and a coating sheet B and an auxiliary sheet E that sandwich the recording paper A therebetween. The first pressurizing mechanism 8 that pressurizes both sides of the recording sheet A, the first branch guide 9 that branches the transport path L of the recording paper A and the transport path of the cover sheet B, and the base material C of the cover sheet B are separated. The second pressurizing mechanism 10 that further pressurizes the recording paper A and the auxiliary sheet E after the coating layer F is formed from both sides, and the first branching path for the recording paper A conveyance path L and the auxiliary sheet E conveyance path. A two-branch guide 11 and a discharge mechanism 3 for discharging the recording paper A after the auxiliary sheet E is separated to the discharge tray 4 are provided. These components are integrally supported by the main body frame 12.
Therefore, in this embodiment, the covering sheet conveying mechanism 6 constitutes the “covering sheet conveying means” of the present invention, and the auxiliary sheet conveying mechanism 7 constitutes the “auxiliary sheet conveying means” of the present invention.

In addition, heaters 8g are respectively provided inside the driving roller 8a and the pressure roller 8b of the first pressure mechanism 8, and heat the recording paper A, the cover sheet B, and the auxiliary sheet E while applying pressure. It has a configuration. In the present embodiment, a halogen lamp is disposed as the heater 8g at the axial center of each of the drive roller 8a and the pressure roller 8b. In this embodiment, the heating temperature by the heater 8g is set to be about 90 to 110 ° C. for the pressure roller 8b and about 50 to 70 ° C. for the driving roller 8a.
Therefore, in this embodiment, the 1st pressurization mechanism 8 comprises the "crimping means" of this invention.
The second pressure mechanism 10 includes a driving roller 10a and a pressure roller 10b that follows the driving roller 10a. A heater 10g is provided inside the pressure roller 10b so that the recording paper A and the auxiliary sheet E on which the coating layer F is formed are heated while being pressed. In the present embodiment, a halogen lamp is disposed in the axial center portion of the pressure roller 10b as the heater 10g. In this embodiment, the heating temperature by the heater 10g is set to be about 80 to 100 ° C. as the surface temperature of the pressure roller 10b.
The first pressure mechanism 8 and the second pressure mechanism 10 are driven by a driving force from a single motor 13.

  As shown in FIG. 3, the covering sheet B used in the covering apparatus according to this embodiment includes a base material C and a peelable transfer layer D provided on one surface of the base material C. . The transfer layer D is a portion that is transferred to the recording surface of the recording paper A to form a coating layer F, and is provided on the base material C and plays a main role for protecting the recording surface of the recording paper A. The protective layer D1 is provided on the outer side of the protective layer D1 and has an adhesive layer D2 for adhering the protective layer D1 to the recording surface of the recording paper A. Moreover, in this embodiment, in order to maintain the coupling | bonding state of these protective layers D1 and contact bonding layers D2, the anchor layer D3 is provided among these.

  As shown in FIG. 5, the transfer layer D of the covering sheet B, which is a material for the covering layer to be attached to the recording paper A, becomes a covering layer F that protects the recording surface of the recording paper A. It is preferable that it is excellent in adhesiveness, has high transparency, is hardly discolored by heat and light, and has excellent chemical and physical barrier properties. As will be described later, when the recording sheet A and the auxiliary sheet E are separated from each other after forming the coating layer F by being transferred onto the recording surface of the recording sheet A and the surface of the auxiliary sheet E around the recording sheet A. In addition, a material and a thickness that can be separated along the vicinity of the edge of the recording paper A from the portion formed on the recording surface of the recording paper A and the portion formed on the surface of the auxiliary sheet E around the recording paper A. Is preferable. Therefore, it is preferable to use, for example, an acrylic resin, a vinyl acetate resin, or the like for the protective layer D1. Here, as will be described later, since the first pressurizing mechanism 8 is configured to pressurize and heat the covering sheet B and the auxiliary sheet E sandwiching the recording paper A from both sides, the adhesive layer D2 includes It is preferable to use a thermoplastic resin such as a polyester resin that has transparency and exerts an adhesive force when heated. The base material C of the covering sheet B has heat resistance and mechanical strength that can stably maintain the shape under the pressurization and heating conditions in the first pressurization mechanism 8 described later, and good peeling from the transfer layer D. It is preferable to have the property. Therefore, for the substrate C, for example, a film of polyethylene terephthalate, polypropylene, polyethylene naphthalate or the like is preferably used.

  Further, the cover sheet B has a constant width that is larger than the width of the recording paper A (the width of the recording paper A having the maximum width in the case of recording paper A having a plurality of types of width). The long sheet is used. In the present embodiment, as the covering sheet B, a sheet wound in a roll shape with the base material C as the outside and the transfer layer D as the inside is used. Thus, the cover sheet B is transported by the cover sheet transport mechanism 6 in a direction in which the transfer layer D faces the auxiliary sheet E.

  As shown in FIGS. 1 and 2, the cover sheet transport mechanism 6 includes a cover sheet supply holding unit 6 a that holds the cover sheet B wound up in a roll shape so that the cover sheet B can be supplied, and a first branch guide 9. A covering sheet base material recovery portion 6b that branches off and recovers the base material C of the covering sheet B after being branched from the transport path L of A and the transfer layer D being peeled off. In the present embodiment, the covering sheet supply holding unit 6a is supported by the main body frame 12 at both ends, and a holding shaft 6c that rotatably holds the covering sheet B wound in a roll shape, and the holding shaft 6c. A rotation limiting mechanism (not shown) for limiting the rotation. As this rotation limiting mechanism, for example, a configuration including a torque limiter between the main body frame 12 and the holding shaft 6c is preferably used. The covering sheet B is pulled out by rotation of a driving roller 8a of the first pressure mechanism 8 to be described later and a pressure roller 8b driven by the first pressure mechanism 8. At this time, the rotation of the holding shaft 6c is limited by the rotation limiting mechanism. Therefore, the tension of the covering sheet B from the covering sheet supply holding portion 6a to the pressure roller 8b of the first pressure mechanism 8 can be maintained. A free roller 6e is rotatably provided between the covering sheet supply holding unit 6a and the conveyance path L of the recording paper A. The free roller 6e adjusts the intrusion angle of the conveyance path of the cover sheet B at a portion where the cover sheet B merges with the conveyance path L of the recording paper A by winding the cover sheet B around the outer periphery thereof in a predetermined angle range. The transport path of the cover sheet B after joining the transport path L of the recording paper A is provided to coincide with the transport path L of the recording paper A up to the branch position by the first branch guide 9.

Further, the covering sheet base material recovery unit 6b is a predetermined unit for winding and recovering the base material C of the covering sheet B after being branched from the conveyance path L of the recording paper A by the first branch guide 9 in a roll shape. A take-up shaft 6f that is rotationally driven in the direction and a take-up shaft drive mechanism 6g that drives the take-up shaft 6f are provided. The take-up shaft drive mechanism 6g includes a motor 14 and a transmission mechanism such as a sprocket, a chain, and a gear that transmits the driving force of the motor 14 to the take-up shaft 6f. Further, the conveying speed V1 of the covering sheet B is controlled to be the same as the conveying speed of the auxiliary sheet E.
Therefore, in the present embodiment, the covering sheet supply holding unit 6a constitutes the “covering sheet supplying unit” in the present invention, and the covering sheet base material collecting unit 6b serves as the “base material collecting unit” in the present invention. Constitute.

  The auxiliary sheet E used in the coating apparatus according to the present embodiment transfers the transfer layer D of the cover sheet B onto the recording surface of the recording sheet A to form the cover layer F, In the portion where the recording paper A does not exist between the plurality of recording papers A, the transfer layer D of the covering sheet B conveyed oppositely is a sheet to which the recording sheet A is transferred. Therefore, as the material of the auxiliary sheet E, it is preferable to use a material to which the adhesive layer D2 provided on the surface of the transfer layer D of the covering sheet B can easily adhere. Therefore, for example, it is preferable to use a film such as polyethylene terephthalate.

  Further, for example, as shown in FIG. 5, the auxiliary sheet E is coated to prevent the transfer layer D from protruding outward from the side edge of the auxiliary sheet E when the transfer layer D of the cover sheet B is transferred. The width of the sheet B is equal to or greater than that of the sheet B. In the present embodiment, as the auxiliary sheet E, a long sheet having a certain width that is slightly wider than the width of the covering sheet B and being wound in a roll shape is used. As a result, the entire lower surface (transfer surface) of the cover sheet B faces the upper surface of the auxiliary sheet E, so that the transfer layer D of the cover sheet B is transferred to the drive roller 8 a of the first pressure mechanism 8. This can be prevented.

  The auxiliary sheet conveyance mechanism 7 is branched from the conveyance path L of the recording paper A by the auxiliary sheet supply holding unit 7a that holds the auxiliary sheet E wound in a roll shape so that the auxiliary sheet E can be supplied. And an auxiliary sheet collecting section 7b for winding and collecting the auxiliary sheet E. In the present embodiment, the auxiliary sheet supply holding unit 7a is supported at the both ends by the main body frame 12, and holds the auxiliary sheet E wound in a roll shape so as to be rotatable, and the holding shaft 7c. A rotation limiting mechanism (not shown) for limiting the rotation. As this rotation limiting mechanism, for example, a configuration including a torque limiter between the main body frame 12 and the holding shaft 7c is preferably used. The auxiliary sheet E is pulled out by rotation of a driving roller 8a of the first pressure mechanism 8 described later and a pressure roller 8b driven by the auxiliary sheet E. At this time, the rotation of the holding shaft 7c is limited by the rotation limiting mechanism. Therefore, the tension of the auxiliary sheet E from the auxiliary sheet supply holding unit 7a to the driving roller 8a of the first pressure mechanism 8 can be maintained. A free roller 7e is rotatably provided between the auxiliary sheet supply holding unit 7a and the conveyance path L of the recording paper A. The free roller 7e adjusts the intrusion angle of the conveyance path of the auxiliary sheet E at the portion joining the conveyance path L of the recording paper A by winding the auxiliary sheet E around the outer periphery of the free roller 7e in a predetermined angle range. Then, the conveyance path L of the auxiliary sheet E after joining the conveyance path L of the recording paper A reaches the branching position by the second branch guide 11 on the downstream side of the second pressurizing mechanism 10. Is provided to match. At this time, the auxiliary sheet E is conveyed opposite to the covering sheet B with the recording paper A sandwiched between the auxiliary sheet E and the covering sheet B until the branch position of the conveying path of the covering sheet B by the first branch guide 9. The

The auxiliary sheet collecting unit 7b is a winding that is rotationally driven in a predetermined direction in order to wind up and collect the auxiliary sheet E that has been branched off from the conveyance path L of the recording paper A by the second branch guide 11 in a roll shape. A take-up shaft 7f and a take-up shaft drive mechanism 7g for driving the take-up shaft 7f are provided. The take-up shaft drive mechanism 7g includes a motor 15 and a plurality of transmission mechanisms such as a plurality of sprockets, chains, and gears that transmit the driving force of the motor 15 to the take-up shaft 7f.
Therefore, in the present embodiment, the auxiliary sheet supply holding unit 7a constitutes the “auxiliary sheet supply unit” in the present invention, and the auxiliary sheet collection unit 7b constitutes the “auxiliary sheet collection unit” in the present invention.

  By the cover sheet transport mechanism 6 and the auxiliary sheet transport mechanism 7 as described above, between the cover sheet B and the auxiliary sheet E which are transported at the same transport speed V1 facing each other, the supply tray 1 and the supply guide 2 are interposed. The recording paper A is supplied, and the recording paper A, the cover sheet B, and the auxiliary sheet E are pressed from both sides by the first pressurizing mechanism 8 in a stacked state.

  The first branch guide 9 is provided between the first pressure mechanism 8 and the second pressure mechanism 10 in the transport path L of the recording paper A, and the transport path L of the recording paper A and the base material C of the cover sheet B. It is a guide member which branches the conveyance path. In the present embodiment, as shown in FIGS. 2 and 4, the first branch guide 9 is a long member that extends in a direction substantially perpendicular to the conveyance direction of the recording paper A on the conveyance path L of the recording paper A. A first guide surface 9a is formed on the lower side of the recording paper A and disposed substantially in parallel with the conveyance path L of the recording paper A. The first guide surface 9a is formed downstream of the recording paper A in the conveyance direction with respect to the first guide surface 9a. A second guide surface 9b is formed so as to extend upward at an acute angle. Then, the base material C of the covering sheet B is peeled from the recording paper A and the auxiliary sheet E at the edge 9c where the first guide surface 9a and the second guide surface 9b are in contact with each other. It is conveyed along the guide surface 9b and is wound up and collected in the form of a roll in the covering sheet base material collecting section 6b. As a result, the coating layer F is formed on the recording surface of the recording paper A and the surface of the auxiliary sheet E around the recording paper A. The first branch guide 9 has a distance such that the adhesive layer D2 of the covering sheet B activated by the heating by the first pressure mechanism 8 is cooled and exhibits a sufficient adhesive force. It is suitable to arrange so that it has with respect to 8.

  The second branch guide 11 is a guide member that is provided on the downstream side of the second pressure mechanism 10 in the transport path L of the recording paper A, and branches the transport path L of the recording paper A and the transport path of the auxiliary sheet E. . In the present embodiment, as shown in FIG. 2, the second branch guide 11 is configured by a member extending in a direction substantially perpendicular to the conveyance direction of the recording paper A on the conveyance path L of the recording paper A, and on the upper side thereof. Is formed with a first guide surface 11a disposed substantially parallel to the conveyance path L of the recording paper A, and extends downward at an acute angle with respect to the first guide surface 11a on the downstream side in the conveyance direction of the recording paper A. The 2nd guide surface 11b provided in this way is formed. The auxiliary sheet E is peeled off from the recording paper A at the edge 11c where the first guide surface 11a and the second guide surface 11b are in contact, and the peeled auxiliary sheet E is conveyed along the second guide surface 11b. Then, the auxiliary sheet collecting unit 7b winds and collects the roll. At this time, as shown in FIG. 5, the recording sheet A advances straight along the conveyance path L in the substantially horizontal direction, whereas the auxiliary sheet E extends along the second guide surface 11 b of the second branch guide 11. Since it is bent and conveyed downward, the coating layer F formed on the recording surface of the recording paper A and the coating layer F formed on the surface of the auxiliary sheet E around the recording paper A are separated from each other. Thus, the coating layer F formed on the recording surface of the recording paper A and the coating layer F formed on the surface of the auxiliary sheet E around the recording paper A are cut along the vicinity of the edge of the recording paper A. To be separated.

  In the recording medium coating apparatus according to the present invention configured as described above, as shown in the functional block diagram of the recording medium coating apparatus shown in FIG. A tension control means TC for controlling the transport mechanism 7 is provided. This tension control means TC can be realized by an arithmetic control device provided in the coating apparatus. The tension control means TC is used to prevent the cover sheet B and the auxiliary sheet E from wrinkling, and in particular, to prevent the cover sheet B covering the recording paper A from wrinkling. The tension applied to the coating sheet B by the coating sheet B, that is, the coating sheet tension, and the tension applied to the auxiliary sheet E by the auxiliary sheet transport mechanism 7, that is, the coating tension to the auxiliary sheet, that is, the auxiliary sheet tension are maintained within a predetermined setting range. Operation control of the sheet conveyance mechanism 6 and the auxiliary sheet conveyance mechanism 7 is performed. Specifically, the tension control means TC takes up the take-up shaft drive mechanism 6g at the outer peripheral portion of the covering sheet base material recovery portion 6b so as to keep the covering sheet tension and the auxiliary sheet tension within predetermined set ranges, respectively. And the auxiliary sheet winding torque by the winding shaft drive mechanism 7g at the outer peripheral portion of the auxiliary sheet collecting portion 7b.

  The setting range of the covering sheet tension and the setting range of the auxiliary sheet tension are determined by considering the elasticity and thickness of the covering sheet B and the elasticity and thickness of the auxiliary sheet E, and the elongation between the covering sheet B and the auxiliary sheet E is The covering sheet B, which is conveyed while sandwiching the recording paper A, is set to a value that is substantially the same, and the tension control means TC controls the covering sheet base material collecting unit 6b and the auxiliary sheet collecting unit 7b. In addition, the auxiliary sheet E can be prevented from being twisted or distorted. For example, the thickness of the covering sheet B used in the present embodiment is 30 μm, and the thickness of the auxiliary sheet E is 25 μm.

  In the recording medium coating apparatus according to the present invention, the substrate winding diameter detection means for directly or indirectly detecting the winding diameter of the substrate C of the coating sheet B in the coating sheet substrate recovery unit 6b. 6i and auxiliary sheet take-up diameter detecting means 7i for directly or indirectly detecting the take-up diameter of the auxiliary sheet E in the auxiliary sheet collecting section 7b, and the tension control means TC is a base of the covering sheet B. The base material winding torque by the covering sheet base material collecting portion 6b is controlled according to the winding diameter of the material C, and the auxiliary sheet winding torque by the auxiliary sheet collecting portion 7b is controlled according to the winding diameter of the auxiliary sheet E. Is configured to do.

  The base material winding diameter detecting means 6i shown in FIG. 6 is based on the detection result of the covering sheet winding remaining diameter detecting means 6j that detects the remaining winding diameter of the covering sheet B in the covering sheet supply holding unit 6a. The auxiliary sheet take-up diameter detecting means 7i is provided so as to indirectly detect the take-up diameter of the base material C of the cover sheet B in the base material collecting section 6b, and the auxiliary sheet take-up diameter detecting means 7i Based on the detection result of the auxiliary sheet winding remaining diameter detecting means 7j for detecting the remaining winding diameter, the winding diameter of the auxiliary sheet E in the auxiliary sheet collecting unit 7b is indirectly detected. As a sensor for realizing the covering sheet winding remaining diameter detecting means 6j and the auxiliary sheet winding remaining diameter detecting means 7j, there is a potentiometer for outputting a signal having a strength corresponding to the size of the remaining winding diameter of each sheet.

  For example, the substrate winding diameter detecting means 6i winds the substrate C of the covering sheet B in the covering sheet substrate collecting portion 6b based on the value of the remaining winding diameter of the covering sheet B in the covering sheet supply holding unit 6a. We have a derivation formula or derivation table for deriving the take-up diameter, and by referring to the derivation formula or derivation table, the winding diameter of the base material C of the covering sheet B in the covering sheet base material recovery unit 6b is determined. To derive. Similarly, the auxiliary sheet take-up diameter detecting means 7i derives the take-up diameter of the auxiliary sheet E in the auxiliary sheet collection section 7b based on the value of the remaining roll diameter of the auxiliary sheet E in the auxiliary sheet supply holding section 7a. The derivation formula or derivation table is held, and the winding diameter of the auxiliary sheet E in the auxiliary sheet collection unit 7b is derived by referring to the derivation formula or derivation table.

  And tension control means TC is the winding diameter of the base material C of the covering sheet B in the base material collection | recovery part 6b for covering sheets derived | led-out by the base material winding diameter detection means 6i with respect to the winding shaft drive mechanism 6g. The base material of the covering sheet B that is wound up in a roll shape around the covering sheet base material collecting part 6b by outputting a control command value (voltage value, current value, etc. for driving the motor 14) according to The base material winding torque at the outer peripheral portion of C, that is, the covering sheet tension applied to the base material C of the covering sheet B wound up in a roll shape by the covering sheet base material collecting portion 6b is constant. Is controlling. Similarly, the tension control means TC controls the control command value corresponding to the winding diameter of the auxiliary sheet E in the auxiliary sheet collecting portion 7b derived by the auxiliary sheet winding diameter detecting means 7i with respect to the winding shaft driving mechanism 7g. By outputting (a voltage value, a current value, etc. for driving the motor 15), the auxiliary sheet winding torque at the outer peripheral portion of the auxiliary sheet E wound in a roll shape on the auxiliary sheet collecting unit 7b, that is, Control is performed so that the auxiliary sheet tension applied to the auxiliary sheet E wound in a roll shape on the auxiliary sheet collecting unit 7b is constant. Further, as described above, the covering sheet tension and the auxiliary sheet tension are kept in a predetermined setting range. The tension control means TC derives a control command value output to the take-up shaft drive mechanism 6g based on the take-up diameter of the base material C of the cover sheet B in the cover sheet base material recovery unit 6b. And a control command value to be output to the take-up shaft drive mechanism 7g based on the take-up diameter of the auxiliary sheet E in the auxiliary sheet collection unit 7b. Has a derivation formula or control table.

  Accordingly, assuming that the tension control means TC controls to always output a constant substrate winding torque to the covering sheet base material collecting portion 6b, the covering sheet in the covering sheet base material collecting portion 6b. When the winding diameter of the base material C of B changes, the base material winding torque at the outer peripheral portion of the base material C changes and is applied to the covering sheet B by the covering sheet base material collecting portion 6b. Similarly, if the covering sheet tension is changed and similarly, the auxiliary sheet collecting unit 7b is controlled to always output a certain auxiliary sheet winding torque, the auxiliary sheet E of the auxiliary sheet collecting unit 7b When the winding diameter changes, the auxiliary sheet winding torque at the outer periphery of the auxiliary sheet E changes, and the auxiliary sheet tension applied to the auxiliary sheet E by the auxiliary sheet collecting unit 7b changes. However, in the coating apparatus according to the present invention, the tension control means TC performs the base material winding at the outer peripheral portion of the base material C of the cover sheet B in the base sheet recovery part 6b for the cover sheet according to the remaining winding diameter of the cover sheet B. Control to make the take-up torque constant, and control to make the auxiliary sheet take-up torque constant at the outer periphery of the auxiliary sheet E in the auxiliary sheet collection unit 7b according to the remaining winding diameter of the auxiliary sheet E Therefore, the covering sheet tension given to the covering sheet B by the covering sheet base material collecting unit 6b and the auxiliary sheet tension given to the auxiliary sheet E by the auxiliary sheet collecting unit 7b are respectively appropriate. Will be adjusted. As a result, the recording medium can be properly coated without twisting or distortion of the covering sheet and the auxiliary sheet.

<Another embodiment>
<1>
In the said embodiment, the base material winding diameter which indirectly detects the winding diameter of the base material C of the coating sheet B in the base material collection | recovery part 6b for coating sheets, and the winding diameter of the auxiliary sheet E in the auxiliary sheet collection | recovery part 7b. The case where the detection means 6i and the auxiliary sheet winding diameter detection means 7i use the covering sheet winding remaining diameter detection means 6j and the auxiliary sheet winding remaining diameter detection means 7j has been described. It is also possible to indirectly detect the winding diameter of the base material C of the covering sheet B in the base material recovery section 6b and the winding diameter of the auxiliary sheet E in the auxiliary sheet recovery section 7b.

  For example, the substrate winding diameter detection means 6i realized by using an arithmetic control device mounted in the coating apparatus performs an execution amount (for example, coating process) of the recording paper A performed in the coating apparatus. The length of the covering sheet B moved from the covering sheet supply holding unit 6a to the covering sheet base material recovery unit 6b side based on the execution time of the recording sheet and the amount of the recording paper A subjected to the covering process). Derived, and based on the supply amount of the covering sheet B and the thickness of the base material C of the covering sheet B, the winding diameter of the base material C in the covering sheet base material recovery unit 6b is sequentially derived. You can also. Similarly, how long the auxiliary sheet take-up diameter detecting means 7i realized by using an arithmetic control device mounted in the coating apparatus is from the auxiliary sheet supply holding unit 7a to the auxiliary sheet collecting unit 7b. The auxiliary sheet E has been moved, and the winding diameter of the auxiliary sheet E in the auxiliary sheet collection unit 7b is sequentially derived based on the supply amount of the auxiliary sheet E and the thickness of the auxiliary sheet E. can do.

In addition, the substrate winding diameter detecting means 6i has a rotational speed measurement sensor for measuring the rotational speed of the covering sheet supply holding unit 6a, and a memory chip provided in the covering sheet supply holding unit 6a. The amount of covering sheet B supplied from the covering sheet supply holding section 6a to the covering sheet base material collecting section 6b is derived by reading the number of revolutions stored in the memory chip. It can also be configured to. Then, similarly to the case described above, the winding diameter of the substrate C in the covering sheet base material recovery unit 6b is derived based on the supply amount of the covering sheet B and the thickness of the base material C of the covering sheet B. Can be configured. Similarly, the auxiliary sheet take-up diameter detecting means 7i determines the rotation speed of a rotation speed measurement sensor for measuring the rotation speed of the auxiliary sheet supply holding section 7a and the memory chip provided in the auxiliary sheet supply holding section 7a. An auxiliary sheet E from the auxiliary sheet supply holding unit 7a to the auxiliary sheet collecting unit 7b side by reading the rotational speed stored in the memory chip by the auxiliary sheet winding diameter detecting means 7i. It can be configured to derive the supply amount. Then, based on the supply amount of the auxiliary sheet E and the thickness of the auxiliary sheet E, the winding diameter in the auxiliary sheet collecting unit 7b can be sequentially derived.
Alternatively, the substrate take-up diameter detection means 6i measures the number of rotations of the cover sheet base material recovery unit 6b and the memory chip provided in the cover sheet base material recovery unit 6b. May be modified so as to derive the winding diameter of the base material C in the covering sheet base material recovery unit 6b in the same manner as described above. Similarly, the auxiliary sheet winding diameter detecting means 7i measures the rotational speed of the auxiliary sheet collecting unit 7b, and the writing device that writes the rotational speed to the memory chip provided in the auxiliary sheet collecting unit 7b. And may be modified so as to derive the winding diameter of the auxiliary sheet E in the auxiliary sheet collecting section 7b in the same manner as described above.

<2>
In the above embodiment and the above-described another embodiment, the substrate winding diameter detection means 6i and the auxiliary sheet winding diameter detection means 7i are the winding diameter of the substrate C of the covering sheet B in the covering sheet substrate recovery part 6b, and Although the case where it is a sensor which indirectly detects the winding diameter of the auxiliary sheet E in the auxiliary sheet collection part 7b has been described, the base material C of the covering sheet B in the covering sheet base material recovery part 6b as shown in FIG. As a sensor for directly detecting the winding diameter of the auxiliary sheet E and the winding diameter of the auxiliary sheet E in the auxiliary sheet collecting section 7b, a substrate winding diameter detecting means 6i and an auxiliary sheet winding diameter detecting means 7i can be provided.

  Substrate winding diameter detection means 6i for directly detecting the winding diameter of the base material C of the covering sheet B in the covering sheet base material recovery section 6b and the winding diameter of the auxiliary sheet E in the auxiliary sheet recovery section 7b and the auxiliary The sheet winding diameter detection means 7i detects the winding diameter of the base sheet C of the covering sheet B in the covering sheet base material recovery section 6b and the winding diameter of the auxiliary sheet E in the auxiliary sheet recovery section 7b using a potentiometer or the like. This is possible.

<3>
In the above embodiment, the tension control means TC takes up the take-up shaft drive mechanism 6g that drives the take-up shaft 6f of the covering sheet base material collecting unit 6b and the take-up shaft that drives the take-up shaft 7f of the auxiliary sheet collection unit 7b. The mode of controlling the shaft driving mechanism 7g to adjust the covering sheet tension and the auxiliary sheet tension has been described. However, the tension control means TC controls other devices to adjust the covering sheet tension and the auxiliary sheet tension. You may comprise.

In the example shown in FIG. 8, the tension control means TC keeps the covering sheet tension and the auxiliary sheet tension within predetermined setting ranges, and the covering sheet supply resistance by the covering sheet supply holding unit 6 a and the auxiliary sheet The auxiliary sheet supply resistance is controlled by the supply holding unit 7a.
Specifically, the recording medium coating apparatus shown in FIG. 8 includes coated sheet remaining winding diameter detecting means 6j for detecting the remaining winding diameter of the coated sheet B in the coated sheet supply holding section 6a, and auxiliary sheet supplying and holding. Auxiliary sheet winding remaining diameter detecting means 7j for detecting the remaining winding diameter of the auxiliary sheet E in the section 7a, resistance means 6h such as a brake capable of controlling the rotational resistance of the holding shaft 6c of the covering sheet supply holding section 6a, and auxiliary Resistance means 7h such as a brake capable of controlling the rotational resistance of the holding shaft 7c of the sheet supply holding portion 7a is provided. The covering sheet winding remaining diameter detecting means 6j and the auxiliary sheet winding remaining diameter detecting means 7j can be realized by using a potentiometer or the like that outputs a signal having a strength corresponding to the size of the remaining winding diameter.

  The tension control means TC controls the covering sheet supply resistance according to the remaining winding diameter of the covering sheet B based on the detection result of the covering sheet winding remaining diameter detecting means 6j, and the detection result of the auxiliary sheet winding remaining diameter detecting means 7j. By controlling the auxiliary sheet supply resistance according to the remaining winding diameter of the auxiliary sheet E based on the tension of the covering sheet B sent out from the covering sheet supply holding unit 6a and the auxiliary sheet supply holding unit 7a The tension of the auxiliary sheet E is appropriately controlled. For example, the tension control unit TC winds the covering sheet B based on the value of the remaining winding diameter of the covering sheet B in the covering sheet supply holding unit 6a and the remaining winding diameter of the auxiliary sheet E in the auxiliary sheet supply holding unit 7a. Derivation formulas for deriving the covering sheet supply resistance control value and the auxiliary sheet supply resistance control value in such a relationship that the covering sheet supply resistance and the auxiliary sheet supply resistance are reduced as the remaining diameter and the remaining winding diameter of the auxiliary sheet E are reduced. Alternatively, a derivation table is possessed, and the covering sheet supply resistance control value and the auxiliary sheet supply resistance control value are derived by referring to the derivation formula or the derivation table. The tension control means TC outputs the covering sheet supply resistance control value and the auxiliary sheet supply resistance control value to the resistance means 6h and the resistance means 7h, respectively. As a result, the covering sheet tension and the auxiliary sheet tension are each maintained within a predetermined setting range, and in particular, the covering sheet tension generated in the covering sheet B between the covering sheet supply holding unit 6a and the first pressurizing mechanism 8. And the auxiliary sheet tension generated in the auxiliary sheet E between the auxiliary sheet supply holding unit 7a and the first pressurizing mechanism 8 are each maintained within a predetermined setting range, and the covering sheet when the recording paper A is sandwiched The auxiliary sheet will not be twisted or distorted.

The perspective view which shows the state which accommodated the coating | coated apparatus which concerns on this invention in the casing. Sectional drawing which cut | disconnected the coating | coated apparatus which concerns on this invention in width direction center vicinity Schematic cross-sectional view showing the structure of the covering sheet according to the present invention Enlarged view of the vicinity of the first branch guide in FIG. Schematic sectional view showing the state when the base material of the covering sheet is peeled off from the recording paper and the auxiliary sheet in the second branch guide of the covering apparatus according to the present invention The figure which shows the functional block diagram of the coating | coated apparatus which concerns on this invention The figure which shows the functional block diagram of the coating | coated apparatus which concerns on this invention The figure which shows the functional block diagram of the coating | coated apparatus which concerns on this invention

Explanation of symbols

1 Supply tray (recording medium supply means)
2 Supply guide (recording medium supply means)
6 Cover sheet transport mechanism (cover sheet transport means)
7 Auxiliary sheet conveying mechanism (auxiliary sheet conveying means)
8 First pressurizing mechanism (crimping means)
A Recording paper (recording medium)
B Coating sheet D Transfer layer (coating layer material)
E Auxiliary sheet F Coating layer TC Tension control means

Claims (6)

A recording medium coating apparatus for coating the surface of a recording medium with a coating layer,
A substrate, said transfer layer peelably formed on one surface of the substrate is provided as a coating layer material to adhere to a recording medium, can be supplied to the cover sheet supply means in a state wound into a roll the coated sheet held on a cover sheet transport means for transporting the cover sheet feeding means and the base material of the cover sheet between the base material collecting means for winding collected into a roll,
The covering sheet held so as to be able to be supplied to the auxiliary sheet supply means in a rolled state is covered between the auxiliary sheet supply means and the auxiliary sheet collection means for collecting and collecting the auxiliary sheet in a roll shape. an auxiliary sheet transport means for feeding transportable at the same speed as the cover sheet to face the seat,
Recording medium supply means for supplying the recording medium between the covering sheet and the auxiliary sheet conveyed opposite to each other;
A crimping means for crimping the covering sheet and the auxiliary sheet facing each other with the recording medium interposed therebetween;
By controlling the substrate winding torque by the substrate collecting means and the auxiliary sheet winding torque by the auxiliary sheet collecting means so as to keep the covering sheet tension and the auxiliary sheet tension within a predetermined setting range, The covering sheet tension is applied to the covering sheet by the covering sheet conveying unit and the auxiliary sheet tension applied to the auxiliary sheet by the auxiliary sheet conveying unit is kept within a predetermined setting range. A recording medium coating apparatus comprising a sheet conveying unit and a tension control unit that controls the auxiliary sheet conveying unit. A substrate winding diameter detection means for directly or indirectly detecting the winding diameter of the substrate in the substrate recovery means;
An auxiliary sheet winding diameter detecting means for directly or indirectly detecting the winding diameter of the auxiliary sheet in the auxiliary sheet collecting means,
The said tension control means controls the said base material winding torque according to the winding diameter of the said base material, and controls the said auxiliary sheet winding torque according to the winding diameter of the said auxiliary sheet. Recording medium coating apparatus. The tension control means controls the covering sheet supply resistance by the covering sheet supply means and the auxiliary sheet supply resistance by the auxiliary sheet supply means so as to keep the covering sheet tension and the auxiliary sheet tension within predetermined setting ranges, respectively. The recording medium coating apparatus according to claim 1 or 2. A recording medium coating apparatus for coating the surface of a recording medium with a coating layer,
A transfer layer formed on the surface of the base material so as to be peelable is provided as a coating layer material to be attached to the recording medium, and can be supplied to the coating sheet supply means in a rolled state. A coated sheet transporting means for transporting the coated sheet held between the coated sheet supplying means and a substrate collecting means for winding and collecting the coated sheet base material in a roll shape;
The covering sheet held so as to be able to be supplied to the auxiliary sheet supply means in a rolled state is covered between the auxiliary sheet supply means and the auxiliary sheet collection means for collecting and collecting the auxiliary sheet in a roll shape. An auxiliary sheet conveying means that conveys the sheet at the same speed as the covering sheet,
  Recording medium supply means for supplying the recording medium between the covering sheet and the auxiliary sheet conveyed opposite to each other;
A crimping means for crimping the covering sheet and the auxiliary sheet facing each other with the recording medium interposed therebetween;
By controlling the covering sheet supply resistance by the covering sheet supply means and the auxiliary sheet supply resistance by the auxiliary sheet supply means so as to keep the covering sheet tension and the auxiliary sheet tension within a predetermined set range, respectively, The covering sheet is conveyed so that the covering sheet tension applied to the covering sheet by the sheet conveying means and the auxiliary sheet tension applied to the auxiliary sheet by the auxiliary sheet conveying means are kept within a predetermined setting range, respectively. And a tension control means for controlling the auxiliary sheet conveying means. Covering sheet winding remaining diameter detecting means for detecting the remaining winding diameter of the covering sheet in the covering sheet supply means;
An auxiliary sheet winding remaining diameter detecting means for detecting a remaining winding diameter of the auxiliary sheet in the auxiliary sheet supply means,
The tension control means controls the covering sheet supply resistance according to the remaining winding diameter of the covering sheet, and controls the auxiliary sheet supplying resistance according to the remaining winding diameter of the auxiliary sheet. Recording medium coating apparatus. 6. The setting range of the covering sheet tension and the setting range of the auxiliary sheet tension are set so that the covering sheet and the auxiliary sheet have substantially the same elongation. 6. Recording medium coating apparatus.

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