JPH0938551A - Coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating apparatus by which a coating liq. can be stably applied on one face of a card medium with a uniform thickness. SOLUTION: In an apparatus by which a coating liq. P is applied on a card medium 6 by using a coater roller 53, the coater roller 53 consists of a groove part 53a on which grooves are engraved on the peripheral direction of the surface and a no-groove part 53b on which no groove is engraved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating device for coating a surface protective film on the surface of a card when making a certification card such as a personal identification card as an ID card.

[0002]

2. Description of the Related Art Conventionally, when producing a certification card such as a personal identification card as an ID card, a protective film is formed on the entire surface (front surface) of the card in order to protect the printed portion of the card. There is. The formation of this protective film is carried out by applying an ultraviolet curable liquid to the entire card and irradiating the applied ultraviolet curable liquid with ultraviolet rays to cure it.

As described above, a coater roller coating method is known as one method for coating a liquid on a flat surface. This system is equipped with a tank containing the liquid to be applied, a pickup roller for taking out the liquid from the tank, a coater roller for providing a fine depression on the surface to transfer the solution from the pickup roller, and a pickup roller provided on the coater roller. In addition, it consists of a scraper that scrapes off unnecessary liquid and a backup roller that is placed opposite to the coater roller and that conveys the medium to be coated. Application is performed by transferring the liquid from the coater roller onto the medium to be coated. Is a method of performing.

When a liquid is applied to a card-shaped medium to be coated by such a coater roller coating system, the end surface of the medium to be coated, especially the coater roller, is separated due to the viscosity of the liquid, the tension with the medium to be coated, and the surface tension of the liquid. Liquid swelling occurs in the portion, and this is a problem because the coating film obtained by aesthetically or by drying or curing the applied liquid becomes uneven in strength.

In many cases, the viscosity of the applied liquid changes depending on the temperature of the atmosphere, so that the film thickness is not stable. If the applied liquid is a hygroscopic liquid,
There is a problem that the coating characteristics change depending on the humidity of the atmosphere and the film thickness is not stable. Therefore, there is a drawback that the coating liquid cannot be stably applied to one surface of the card medium with a uniform thickness.

[0006]

SUMMARY OF THE INVENTION As described above, it eliminates the drawback that the coating liquid cannot be stably applied to one side of the card medium with a uniform thickness. An object of the present invention is to provide a coating device capable of stably coating the coating liquid with a uniform thickness.

[0007]

The coating apparatus of the present invention comprises:
In a case where a coater roller is used to apply a coating liquid to a card medium, the coater roller is composed of a grooved portion on the surface of which a groove is formed and a grooveless portion where the groove is not formed.

In the coating apparatus of the present invention, the coating liquid is coated on the card medium by using the coater roller. In the coater roller, a groove portion in which the groove is formed in the circumferential direction of the surface and the groove is not formed. It is composed of two or more ungrooved portions.

In the coating apparatus of the present invention, the coating liquid is applied to the card medium by using the coater roller, and the coater roller is made of a material that repels the coating liquid from the groove portion in which the groove is formed in the circumferential direction of the surface. It is composed of a non-grooved part without grooves.

The coating apparatus of the present invention comprises a tank containing the coating liquid, a pickup roller for pumping the coating liquid from the tank, and a coater roller for receiving the coating liquid from the pickup roller and coating the coating liquid on the card medium. In this case, a brush that contacts the coater roller and scrapes the coating liquid on the surface of the coater roller into the tank, and a filter that filters the coating liquid scraped into the tank by this brush, and the coating liquid filtered by this filter Is picked up by a pickup roller.

In the coating apparatus of the present invention, for coating the coating liquid on the card medium conveyed by using the coater roller, the conveying means for conveying the card medium and the conveying position of the card medium conveyed by the conveying means are detected. First detecting means, a second detecting means for detecting the rotational position of the coater roller, a card medium conveyance position detected by the first detecting means, and a rotation of the coater roller detected by the second detecting means. The control means is configured to control the transportation of the card medium by the transportation means according to the position.

The coating apparatus of the present invention, which coats the coating liquid on the card medium by using the coater roller, comprises a flexible film sheet which is in contact with the coater roller and makes the coating liquid on the coater roller uniform. There is.

In the coating apparatus of the present invention, which coats a card medium with a coating liquid by using a coater roller, two or more flexible film sheets which are in contact with the coater roller and make the coating liquid on the coater roller uniform. It consists of

In the coating apparatus of the present invention, the coating liquid is coated on the card medium conveyed by using the coater roller. In the coating apparatus, the control means for controlling the conveyance speed of the card medium and the rotation speed of the coater roller with the passage of time. It consists of

The coating apparatus of the present invention, which coats the coating liquid on the card medium conveyed by using the coater roller, is provided on the card medium conveyance path and detects the conveyance of the card medium. Two detection means, and the first,
The control means is configured to change and control the conveyance speed of the card medium and the rotation speed of the coater roller according to the detection output of the second detection means.

The coating apparatus of the present invention comprises a tank containing the coating liquid, a pickup roller for pumping the coating liquid from the tank, and a coater roller for receiving the coating liquid from the pickup roller and coating the coating liquid on the card medium. The temperature of the coating liquid in the tank is detected by a detecting means, a heating means for heating the coating liquid in the tank, and the heating means is controlled in accordance with the detection result of the detecting means to keep the coating liquid in the tank at a constant temperature. It is composed of a control means.

The coating apparatus of the present invention is for coating a coating liquid on a card medium conveyed by using a coater roller, and is provided in contact with the heating means incorporated in the coater roller and the coater roller, and the surface of the coater roller. It is composed of detection means for detecting the temperature and control means for controlling the heating means according to the detection result of the detection means to bring the surface temperature of the coater roller to a predetermined temperature.

The coating apparatus of the present invention comprises a tank containing the coating liquid, a pickup roller for pumping the coating liquid from the tank, and a coater for receiving the coating liquid from the pickup roller and coating the coating liquid on the card medium conveyed. A detection means for detecting the humidity of the coating liquid in the tank by a change in conductivity between two electrodes in contact with the coating liquid, and a card medium transport speed according to the detection result of the detection means. And a control means for changing and controlling the rotation speed of the coater roller.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic sectional view showing the structure of the ID card producing apparatus of the present invention. That is, the ID card creation device 1 has a housing as the device body 2.

An operation input unit 3 for inputting personal data to be printed on a card medium, that is, character information, is provided on the front surface of the housing 2 (on the right side of FIG. 2 when viewed from the upright direction of the reference numeral). It is arranged. The operation input unit 3 has an ID
An operation panel 4 as a first input means for inputting information for independently operating the card making apparatus 1 and information necessary for a certification card, and a second input means for directly inputting the face photograph data of the owner, that is, face image information. A magneto-optical disk device 5 and a display device, which is not described in detail, for displaying the information content or abnormality input by these devices are arranged.

Above the front side of the housing 2, a card medium 6 which is an original ticket before printing and is to be issued as a certification card S by printing a face photograph and character information is held and sequentially printed one by one. A card medium supply unit 7 is provided for picking up and supplying each one.

The card medium supply unit 7 has a card hopper 8 for accommodating a plurality of card mediums 6 in a horizontal state with the surface to be printed, that is, the surface facing upward. Card hopper 8
A weight 9 for pressing the stored card medium 6 downward is provided therein.

The card media 6 in the card hopper 8 are taken out one by one from the card media 6 located at the lowermost part of the card hopper 8 by a take-out roller 10 composed of a rubber roller which rotates counterclockwise. It should be noted that the card medium take-out port 8a of the card hopper 8 has a gap wider than one card medium 6 and narrower than two to prevent the card medium 6 from being stacked and taken out. An unillustrated double feed prevention mechanism called a knife is provided.

To the left of the card hopper 8 in the state in which FIG.
With respect to the card medium 6 taken out from the card hopper 8 by the above, the glue that adheres to the adhesive layer and peels off dust that may be attached to the surface (printing surface) of the card medium 6 due to contact with the throat knife at the time of taking out A roller 11 is arranged. Card medium 6 taken out by take-out roller 10
Is cleaned by the glue roller 11 to remove dust that may be attached due to contact with the throat knife during removal.

To the left of the glue roller 11, a heat-sensitive sublimation color photographic printing section 12 for printing a face photograph of the owner is arranged. The card medium 6 from which the surface dust has been removed by the glue roller 11 is sent to the color thermal sublimation printing unit 12.

The heat-sensitive sublimation color photographic printing section 12 prints the face image of the holder (updater) on the card medium 6 in full-color multicolor, and red (R) color-separated based on the subtractive color mixing method. ), Green (G), and blue (B), which are complementary colors to each other, yellow (yellow, hereinafter Y or suffix Y), magenta (red, hereinafter M or suffix M), and A yellow printing section 14Y and a magenta printing section, which are sequentially arranged along the direction in which the card medium 6 is conveyed, in order to sequentially superimpose three colors of cyan (purple, hereinafter C or suffix C) for thermal sublimation printing. 14M and a cyan printing unit 14C. On the surface of the card medium 6 guided to the heat-sensitive sublimation color photographic printing section 12, the owner's face photograph supplied by the magneto-optical disk device 5 is color printed by superimposing three colors of Y, M and C. .

The printing units 14Y, 14M and 14C are
Specifically, the platen rollers 15Y, 15M and 15
C, thermal printing heads 16Y, 16M and 16C, and thermal sublimation printing ink ribbons 17Y, 17M and 17C of three colors of Y, M and C with an intermediate portion interposed between each platen roller and the thermal printing head. Ink ribbon delivery shafts 18Y, 18M and 18C with the rear ends of the ink ribbons 17Y, 17M and 17C wound, and ink ribbon take-up shafts 19Y and 19M with the ends of the ink ribbons 17Y, 17M and 17C wound. And 19C.

Platen rollers 15Y, 15M and 15
C is formed of a soft rubber roller or a ceramic implantation roller in which ceramic powder is implanted in order to minimize slippage with the card medium 6.

A melt transfer character printing section 20 is arranged at a subsequent stage of the thermal sublimation color photographic printing section 12, that is, to the left of the thermal sublimation color photographic printing section 12 in FIG. The card medium 6 on which the face image is printed by the heat-sensitive sublimation color photo printing unit 12 is sent to the melt transfer character printing unit 20.

The heat-sensitive sublimation color photographic printing section 12 is a heat-sensitive sublimation type three-color printing, whereas the melt transfer character printing section 20 is a melt transfer type and prints only black. This is because the melt transfer type printing requires a lower applied energy as compared with the sublimation type printing to make the printing speed faster. That is, the print area (length in the longitudinal direction) compared to color printing of face images
For wide character printing, melt transfer printing is desirable.

The melt transfer character printing section 20 is used for the card medium 6
A black printing device for printing the owner's personal data, that is, character information, including a platen roller 21, a thermal printing head 22, a melt transfer ink ribbon 23, an ink ribbon delivery shaft 24, and an ink ribbon winding shaft 25. Has been done.

A light resistance improving protective film (ultraviolet ray or UltraViolet protective film) transfer portion (hereinafter, referred to as a UV protective film transfer portion) 26 as a protective film forming means is arranged in the subsequent stage of the melt transfer character printing portion 20. There is. UV protection film transfer unit 2
6 is for preventing the sublimation-printed face image from fading when a UV-curable surface protective film is applied to the surface of the card medium 6 on which the color face photograph and black character information are printed in the final step. It forms the protective film of. The UV protection film transfer section 26 includes a heating roller 27, a pinch roller 28, a UV protection film sheet 29, a UV sheet feeding shaft 30, and a UV sheet winding shaft 31.

On the surface of the card medium 6 on which the face photograph and the character information are printed, which is guided to the UV protective film transfer section 26,
In order to prevent the sublimation-printed face image from fading from the ultraviolet rays applied in the final step, the UV protection film transfer section 26 melt-transfers the UV protection film. Note that U
The V protective film is also used to prevent fading (light resistance) due to exposure to sunlight when the certification card S formed of the card medium 6 is actually used. Also,
The UV protective film heats a sheet in which a transparent UV protective film is continuously formed on a support ribbon like a thermal printing ink ribbon, by a pinch roller 28 and a heating roller 27 in which a heating element is embedded. By applying pressure at the same time,
The UV protection film is transferred onto the card medium 6. The UV protection film can be transferred by a thermal printing head, but since it is transferred on the entire surface of the card medium 6, a cheaper heat roller is used.

At the subsequent stage of the UV protective film transfer section 26, already,
A surface protective film applying section 3 for applying a surface protective film, which will be described later, onto the surface of the card medium 6 on which the face photograph and the character information are printed.
4, and a card transport mechanism that transports the card medium 6 from the UV protective film transfer unit 26 toward the surface protective film coating unit 34.

The card medium 6 to which the UV protection film has been melt-transferred by the UV protection film transfer section 26 is sent to the chute section 33 by the clamp roller 32 and supplied to the surface protection film coating section 34 below the chute section 33. . More specifically, when the front end of the card medium 6 sent by the clamp roller 32 hits the chute member 33a, the rear end (right end) of the card medium 6 separates from the clamp roller 32 and rotates clockwise, and the guide plate 35 is released. Is supplied to the surface protection film coating section 34 below.

The surface protective film coating section 34 coats the surface of the card medium 6 with an ultraviolet (UV) curing liquid as a surface protective film. The card medium 6 coated with the ultraviolet curable liquid as the surface protective film by the surface protective film coating section 34 is
It is guided by the guide plate 36 and is transferred to the horizontal belt conveyor 37 below the surface protective film coating section 34. The belt conveyer 37 receives the transferred card medium 6 and conveys it to the right, and gradually guides the posture disturbed by a drop through an alignment guide (not shown) to a correct posture, and serves as a surface protective film curing unit. Surface protective film curing section 38
Sent to The surface protective film curing unit 38 cures the ultraviolet curable liquid applied on the card medium 6, and is composed of a belt conveyor 39 and a mercury lamp 40 installed above the belt conveyor 39 with a distance of about 10 cm.

The card medium 6 carried by the belt conveyor 37 is transferred to the belt conveyor 39 and carried by the belt conveyor 39 over a predetermined time. At this time, the surface of the card medium 6 conveyed on the belt conveyor 39 is irradiated with ultraviolet rays from the mercury lamp 40. As a result, the ultraviolet curable liquid applied to the surface of the card medium 6 by the surface protective film application unit 34 is reliably cured for a predetermined time, that is, while the card medium 6 is being conveyed by the belt conveyor 39.

The card medium 6 that has passed through the surface protective film curing portion 38, that is, the completed certification card S, is conveyed by the conveying roller 41.
The surface protection film curing unit 38 is conveyed through the stacker 42 and is housed in a stacker 42 provided to the right in the figure.

Next, the operation of the ID card making apparatus 1 will be described. In the case of creating a normal card with a facial photograph, first, the facial photograph of the owner is taken through a photographing device (not shown). The photographed face photograph is stored in an optical disc as a storage medium, and is supplied to the device 1 by the magneto-optical disc device 5 as face photograph data.

The face photograph data supplied by the optical disk is taken into an image memory typified by a video RAM or a page memory (not shown), and stored in the card medium 6 as 3
It is developed and held as Y, M, and C print data for performing color printing of colors.

When an instruction to create a card is given by the operation panel 4, the card media 6 are taken out one by one from the lowermost part of the card hopper 8 of the card medium supply section 7 via the take-out roller 10. The card medium 6 taken out from the card hopper 8 is cleaned by the glue roller 11 and guided to the color thermal sublimation printing unit 12.

Color printing is performed on the surface of the card medium 6 guided by the color thermal sublimation printing unit 12 by superimposing images of three colors of Y, M and C corresponding to the print data held in the image memory. It

The card medium 6 on which the face image is printed by the heat-sensitive sublimation color photographic printing unit 12 is the melt transfer character printing unit 2
It is sent to 0. On the surface of the card medium 6 guided to the melt transfer character printing section 20, character information of the owner input by the operation panel 4 or supplied by an external device (not shown) or a floppy disk is printed in black.

The card medium 6 on which the character information is printed by the melt transfer character printing unit 20 is guided by the UV protection film transfer unit 26 to form a UV protection film, and then the surface protection film coating unit 34 and the surface protection film. A protective film made of an ultraviolet curable resin is formed via the curing section 37.

A face photograph and character information are printed, and UV
The certification card S having the protective film and the ultraviolet curable resin protective film formed thereon is discharged to the stacker 42. The surface protective film coating section 34 will be described in detail with reference to FIGS. 1 to 10.

That is, the card medium 6 inserted along the guide plate 35 is taken in by the take-in roller pair 51a, 51b, and passes through the card position detecting sensor 52 for detecting the position of the card medium 6, and then the coater roller. By being nipped and conveyed by 53 and the backup roller 54,
The coating liquid P is applied by the coater roller 53, guided by the guide plate 36, and guided to the belt conveyor 37.

The take-up roller pairs 51a and 51b rotate in the direction of the arrow shown in the figure, and the rotary shaft 71 of the take-up roller pair 51a is connected to the pulse motor 87 via the take-up roller electromagnetic clutch 72. There is. A pulse motor 87 is also connected to the rotary shaft 73 of the backup roller 54. As a result, the take-up rollers 51a, 51b and the backup roller 54 have the same peripheral speed.

The card position detecting sensor 52 is composed of a separate type light emitting element 52a and a light receiving element 52b which are arranged opposite to each other. Further, it may be a reflection type in which a light emitting element and a light receiving element are provided side by side to detect reflected light from a detection target.

When the front end of the card medium 6 is detected by the card position detection sensor 52, the transmission of the rotational force of the pulse motor 87 by the take-in roller electromagnetic clutch 72 is interrupted, and the rotation of the take-in rollers 51a, 51b is stopped. By doing so, the card medium 6 stops at that position.

The coater roller 53 is in contact with the pickup roller 55 at a contact A, and the pickup roller 55
Thus, the coating liquid P drawn up from the tank 56 is applied.

The pick-up roller 55 is immersed in the coating liquid P in the tank 56. By rotating the pickup roller 55, the coating liquid P is agitated to make the liquid temperature uniform, and the coating liquid P is applied to the surface of the pickup roller 55. It is designed to be taken out.

A part of the coating liquid P taken out by the pickup roller 55 is applied to the coater roller 53 at a contact point A where the pickup roller 55 and the coater roller 53 face each other.
To move to.

As shown in FIG. 4, the surface portion of the coater roller 53 is provided with a groove portion 53a to which the coating liquid P adheres and an ungrooved portion (sealing portion) 53b to which the coating liquid P does not adhere. The coating liquid P can be stably held by a certain amount by the groove of the groove portion 53a. The length of one circumference of the surface portion of the coater roller 53 matches the length of the card medium 6, and the width of the coater roller 53 is the same as the width of the card medium 6 or slightly (+
It is wide (about 3 mm). The grooveless portion 53 has a predetermined width in the direction orthogonal to the rotation direction of the coater roller 53. Since the non-grooved portion 53a has no groove, the amount of the coating liquid P is small. Ungrooved portion 53a
Is more effective if it is made of a material that repels the coating liquid P, the amount of the coating liquid P can be reduced. When the card medium 6 is conveyed by the coater roller 53, the grooveless portion 5
3 is controlled so as to face the rear end of the card medium 6.

A pulse motor 88 is connected to one end of the rotary shaft 74 of the coater roller 53. A pulse motor 88 is also connected to the rotary shaft 76 of the pickup roller 55.

Coater roller 53 and backup roller 5
4, independent speed control is performed. For example,
When the coating liquid P on the coater roller 53 is insufficient and the liquid film thickness on the card medium 6 becomes thin, the lack of the coating liquid P can be compensated by increasing the rotation speed of the coater roller 53. On the contrary, when the coating liquid P on the coater roller 53 is excessive, the rotation speed of the coater roller 53 is reduced to reduce the film thickness of the liquid on the card medium 6.

Coater roller 53 and backup roller 5
The gap 4 is smaller than the thickness of the card medium 6, and the coater roller 53 and the backup roller 54 apply a conveying force to the card medium 6.

That is, since the gap between the coater roller 53 and the backup roller 54 is set to be slightly smaller than the thickness of the card medium 6, the card medium 6 is conveyed by the rotation of the backup roller 54. Since the coating liquid P, which is a fluid, is present between the coater roller 53 and the card medium 6, the friction resistance is small, and the card medium 6 is small.
The conveyance speed of is almost equal to the rotation speed of the backup roller 54.

When the card medium 6 separates from the coater roller 53, a swelling portion of the coating liquid P is generated at the rear end of the card medium 6 due to the surface tension and viscosity of the coating liquid P. Further, since the card medium 6 is pressed against the coater roller 53, the coating liquid P
Are accumulated on the contact side of the coater roller 53 and the surface of the card medium 6 on the card medium 6 taking-in side, and the backup roller 54 is soiled at the rear end of the card medium 6 without being completely transferred to the card medium 6.

Therefore, as shown in FIG. 8, the backup roller is reduced by reducing the speed (peripheral speed) of the coater roller 53 before the rear end of the card medium 6 reaches the coater roller 53 to reduce the supply of the coating liquid P. It is possible to prevent 54 from being soiled and to reduce the rise of the coating liquid P at the rear end of the card medium 6.

The upper part of the coater roller 53 is shown in FIG.
As shown in FIG. 5, two sheets of smoothers 57 and 58 made of thin films (flexible film sheets) are provided in an overlapping state. A spacer 59 is provided between the smoothers 57 and 58. Smoother 57,
Reference numeral 58 is for reducing unevenness of the coating liquid P on the coater roller 53 to realize a flat liquid surface.

As a result, the coating liquid P transferred to the coater roller 53 is spread by the smoothers 57 and 58 and spread on the surface of the coater roller 53 with a uniform thickness. Further, since the smoothers 57 and 58 hold the coating liquid P in the gap between the smoothers 57 and 58 and the coater roller 53,
The change in the thickness of the liquid film due to the change in the speed of the coater roller 53 is provided with hysteresis, and the function of a low-pass filter that changes the change smoothly is realized.

The ends of the smoothers 57 and 58 are formed obliquely. For example, as shown in FIG. 6A, the end of the smoother 57 is raised to the left and shown in FIG. 6B. As described above, the end portion of the smoother 58 is rising to the right. As a result, a frictional force acts on the coating liquid inside the smoothers 57, 58 with the end surfaces of the smoothers 57, 58 as a boundary, and no friction occurs on the coating liquid outside the smoothers 57, 58. Therefore, the direction in which the coating liquid P flows (coater roller 53
6), when the rear ends of the smoothers 57, 58 are inclined, the coating liquid P moves to the longer side of the smoother, so that the coater roller 53 is centered as shown in FIG. 6C. The coating liquid P is evenly applied to the above.

At this time, obliquely cutting the rear ends of the smoothers 57 and 58 is easy to process because the processing is simple. As a result, when the pulse motor 88 rotates, the pick-up roller 55 receives the coating liquid P drawn from the tank 56 at the contact A, and the smoother 57,
At 58, the coating liquid P is spread on the surface of the coater roller 53 to have a uniform thickness.

Instead of using the two smoothers 57 and 58, one smoother having a rear end having a curvature shown in FIGS. 7A and 7B may be used. In the case of (a) of FIG. 7, the coating liquid is collected at the center of the rear end of the smoother, which is effective when the viscosity of the coating liquid is low and the coating liquid easily escapes to both sides of the card medium. In the case of FIG. 7B, the coating liquid collects on both sides of the rear end of the smoother, which is effective when the viscosity of the coating liquid is high and it is difficult for the coating liquid to escape. You can choose which one to use.

A heater 62 for heating the coater roller 53 is provided inside the coater roller 53, and a thermistor 60 for detecting the surface temperature of the coater roller 53 is provided on the surface of the coater roller 53. This thermistor 6
The heater 62 is turned on and off by a temperature control circuit 92 described later according to the temperature detected by 0, and the surface temperature of the coater roller 53 is controlled to a constant temperature.

Further, as shown in FIG. 3, the coater roller 5
A disk 75 having a cutout portion 75 a is connected to the other end of the rotary shaft 74 of No. 3, and the cutout portion 75 a is detected by a coater roller rotation angle sensor 61 provided facing the disk 75. By doing so, the rotational position of the coater roller 53 is detected.

The coater roller rotation angle sensor 61 is composed of an optical sensor. Also, the coater roller 53
A brush 65 that is in contact with the coater roller and scrapes off the coating liquid on the surface of the coater roller into the tank 56 is provided in the lower part of the. The other end of the brush 65 is connected to a partition 64 in the tank 56, and a filter 63 for removing dust by filtering the coating liquid P scraped into the tank 56 by the brush 65 is provided below the partition 64. ing.

As a result, even if dust adheres to the grooves of the coater roller 53, the brush 65 cleans the coating liquid P scraped off from the coater roller 53, and the filter 63 filters the coating liquid P before reuse of the pickup roller. can do.

In the tank 56, a humidity sensor 66 for detecting the amount of water absorbed by the coating liquid P based on the change in conductivity between the two electrodes in contact with the humidity of the coating liquid P in the tank 56. Is to be inserted.

The amount of the coating liquid P adhered to the pickup roller 55 depends on the humidity of the coating liquid P. Therefore, if the amount of adhesion increases according to the measurement result of the humidity sensor 66, the pickup roller 55 and the coater roller 53 rotate. When the speed is slowed down and the adhered amount is reduced, the rotation speeds of the pickup roller 55 and the coater roller 53 are increased so that the amount of the coating liquid supplied to the card medium 6 is always controlled to be stable. .

As a result, the humidity can be detected by using the humidity sensor 66, and the application control of the hygroscopic coating solution can be switched to perform stable application to the environment. Also, tank 5
A heater 67 that warms (heats: preheats) the coating liquid P in the tank 56 in advance and a thermistor 68 that detects the temperature in the tank 56 are provided below the unit 6. The temperature control circuit 91 described later controls ON / OFF of the heater 67 according to the temperature detected by the thermistor 68, and controls the temperature of the coating liquid P in the tank 56 to a constant temperature.

Next, the control circuit of the ID card making apparatus 1 will be described with reference to FIG. That is, the CPU 81 is provided as a main control unit that controls the entire ID card creating apparatus 1. The CPU 81 has a work RAM 82 in which data is stored, a ROM 83 in which control programs are stored, a nonvolatile RAM 84 in which various parameters are stored, a timer IC 85 for time monitoring, an operation panel 4, a magneto-optical disk. Device 5, card medium supply unit 7, color thermal sublimation printing unit 12, melt transfer character printing unit 2
0, the UV protective film transfer unit 26, the surface protective film coating unit 34, and the surface protective film curing unit 38 are connected.

The surface protective film coating section 34 has a pulse motor drive circuit 86 for driving the pulse motors 87, 88 according to a control signal from the CPU 81, a card position detection sensor 52,
A sensor circuit 89 for outputting the sensor output from the coater roller rotation angle sensor 61 and the humidity sensor 66 to the CPU 81,
An electromagnetic clutch drive circuit 90 for exciting the take-in roller electromagnetic clutch 72 by a control signal from the CPU 81, and a heater 67 turned on in response to a detection signal from the thermistor 68,
By turning off, the temperature control circuit 91 for controlling the temperature of the coating liquid P in the tank 56 to a constant temperature, the thermistor 60.
The temperature control circuit 92 controls the surface temperature of the coater roller 53 to a constant temperature by turning on and off the heater 62 according to a detection signal from the.

As shown in FIG. 10, the temperature control circuit 91 includes a volume resistance Vr for dividing the constant voltage Vc, a series circuit including a thermistor 68 and a resistance Rb to which the constant voltage Vc is applied, and a constant voltage Vc by the volume resistance Vr. Comparator IC1 that compares the difference between the reference voltage obtained by dividing the voltage and the change in the voltage across the resistor Rb due to the change in the resistance value of the thermistor 68, and is turned on according to the output from the comparator IC1,
It is composed of an NPN transistor Tr which is turned off and connected to the heater 67.

As a result, when the temperature of the coating liquid P in the tank 56 detected by the thermistor 68 is lower than the set temperature,
When the transistor Tr is turned on and the power supply voltage Vp is applied to the heater 67, the coating liquid P in the tank 56
Is heated. When the temperature of the coating liquid P in the tank 56 detected by the thermistor 68 is higher than the set temperature, the transistor Tr is turned off and the power supply voltage V to the heater 67 is increased.
The application of p is cut off, and there is a state of waiting until the temperature drops due to natural heat dissipation. By such control, the temperature of the coating liquid P is kept constant.

As described above, the coating liquid P in the tank 56 is preheated to a constant temperature by the heater 67,
Since the temperature of the coating liquid P in 6 is kept constant, the change in viscosity can be suppressed.

The temperature control circuit 92 also has a circuit configuration similar to that of the temperature control circuit 91. The pulse motors 87 and 88 are step motors and can be rotated by the number of steps set by the CPU 81. Therefore, the CPU 81
Uses a built-in timer (not shown) or the timer function of an external timer IC 85 to rotate the pulse motors 87 and 88 at a predetermined speed for a predetermined time to pick up the roller 55, coater roller 53 and backup. The rotation of the roller 54 is controlled.

The CPU 81 uses the card position detection sensor 52.
When the detection signal of the front end of the card medium 6 is supplied, the energization of the take-in roller electromagnetic clutch 72 is cut off.
As a result, the rotational force of the pulse motor 87 is not transmitted to the take-in roller pair 51a and 51b, and the take-in roller pair 51
The a and 51b are designed to be stopped while holding the card medium 6.

After that, when the detection signal for the cutout portion 75a of the disk 75 is supplied from the coater roller rotation angle sensor 61, the CPU 81 determines that the coater roller 53 is at a predetermined position, and makes a fixed time adjustment. After that, the take-in roller electromagnetic clutch 72 is connected. As a result, the take-in roller pairs 51a and 51b are rotated, and the card medium 6 is conveyed between the coater roller 53 and the backup roller 54. That is, the surface position of the coater roller 53 with respect to the cutout portion 75 a is changed from the position of the coater roller rotation angle sensor 61 to
The rotation time of the coater roller 53 up to the transfer position of the coating liquid P to the card medium 6 facing the backup roller 54 depends on the transfer position of the coating liquid P from the detection position by the card position detection sensor 52 to the card medium 6 by the coater roller 53. It can be timed with the transport time of the card medium 6 to the position.

Next, the coating operation of the surface protective film in the surface protective film coating section 34 will be described. That is, the guide plate 3
The card medium 6 inserted along the line 5 is a take-up roller pair 51.
The a and 51b are taken in and conveyed by rotating in the direction of the arrow shown.

When the card position detection sensor 52 detects the leading end of the card medium 6, the take-in roller pairs 51a, 51
The clutch b is disconnected from the pulse motor 87 by the clutch 72, and the conveyance of the card medium 6 is stopped.

The coater roller 53 is the pickup roller 5
5 is connected to the pulse motor 88 together with the pulse motor 8
When the pick-up roller 55 rotates, the coating liquid P drawn from the tank 56 is received by the contact point A by the rotation of the pick-up roller 55, and spreads to a uniform thickness on the surface of the coater roller 53 by the smoothers 57 and 58.

The rotation position of the coater roller 53 is detected by the coater roller rotation angle sensor 61. When the coater roller rotation angle sensor 61 detects that the coater roller 53 is at a predetermined position, the clutch 7 is adjusted for a certain time and the clutch 7
By connecting the card medium 6 to the coater roller 5
3 and the backup roller 54.

Coater roller 53 and backup roller 5
The coating liquid P on the surface of the coater roller 53 is transferred onto the surface of the card medium 6 which was sent during 4. Coater roller 53
Since the gap between the backup roller 54 and the backup roller 54 is set to be slightly smaller than the thickness of the card medium 6, the card medium 6 is conveyed by the rotation of the backup roller 54.

Coater roller 53 and backup roller 5
The card medium 6 that has passed between 4 slides on the guide plate 36, rides on the conveyor belt 37, and is discharged from the coating device.
The pickup roller 55 is rotated by the pulse motor 88.

The pick-up roller 55 is immersed in the coating liquid P in the tank 56, and by rotating it, the coating liquid P
And the coating liquid P is applied to the surface of the pickup roller 55 and taken out.

A part of the taken-out coating liquid P is a contact A at which the pickup roller 55 and the coater roller 53 face each other.
Then, it moves to the coater roller 53. The coating liquid P transferred to the coater roller 53 is spread by the smoothers 57 and 58 and spread on the surface of the coater roller 53 with a uniform thickness.

In the above example, the circumference of the coater roller 53 and the length of the card medium 6 are substantially the same, and the peripheral speed of the coater roller 53 and the conveying speed of the card medium 6 are the same. Not limited to this, when the peripheral speed of the coater roller 53 is half or less than the conveying speed of the card medium 6, the ungrooved portion 53b of the coater roller 53 is set to two or more places as shown in FIG. Is also good. In this case, it is possible to shorten the waiting time for the coater roller 53 to reach the beginning,
The throughput of the card medium can be improved.

As described above, by providing the coater roller with the sealing (no groove) portion, the amount of the coating liquid in that portion can be reduced, and the rear end of the card medium is fitted to the sealing. As a result, it is possible to prevent the coating liquid from rising at the rear end of the card medium.

Further, the supply of the coating liquid can be stopped by stopping the rotation of the coater roll at the rear end of the card medium. In addition, it is the same as the width of the card medium or slightly (+3
By using a wide coater roll, it is possible to prevent the rise of the liquid generated at the end of the coater roll to the end face of the coater and prevent the rise of the coating liquid generated at both ends of the card.

By using a smoother, it is possible to prevent the generation of lines and unevenness. If a smoother with a short center and long ends is used, the liquid will collect in the center. If the smoother having such a shape is used, the thickness of both ends of the card medium can be suppressed, and the rise of the coating liquid of the card medium which occurs in the case of the card medium having rounded corners can be prevented.

By providing a thermistor and a heater on the tank and coater roller to control the temperature, the viscosity of the coating liquid can be kept constant and stable coating can be performed.
Further, by making the feeding speed of the card medium by the coater roller and the backup roller slow at the beginning of coating, it is possible to prevent the generation of streaks and unevenness.

Further, by making the rotation speed of the coater roller slower than that of the backup roller, it is possible to prevent the coating liquid from rising at both ends of the card medium. Further, the humidity can be detected by using the humidity sensor, and the application control of the hygroscopic coating solution can be switched to perform stable application to the environment.

Further, the groove of the coater roller is formed in parallel with the conveying direction of the card medium, so that the surface of the card medium can be prevented from being scraped. Further, the coating liquid which has been brushed off by brush so as to prevent dust from adhering to the groove of the coater roller can be filtered and reused.

[0095]

As described in detail above, it is possible to provide a coating apparatus capable of stably coating the coating liquid on one surface of a card medium with a uniform thickness.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a surface protective film coating section used in an ID card producing apparatus for explaining an embodiment of the present invention.

FIG. 2 is a side view showing a schematic configuration of an ID card creation device.

FIG. 3 is a diagram showing a schematic configuration of a surface protective film coating section.

FIG. 4 is a perspective view for explaining a surface configuration of a coater roller.

FIG. 5 is a perspective view for explaining a configuration of two smoothers for a coater roller.

FIG. 6 is a perspective view for explaining movement of a coating liquid by two smoothers and a coating state on a card medium.

FIG. 7 is a diagram for explaining the configuration of a smoother.

FIG. 8 is a diagram for explaining the conveyance speed of the card medium by the backup roller and the peripheral speed of the coater roller when the coating liquid is applied to the card medium by the coater roller.

FIG. 9 is a block diagram showing a configuration of a control circuit of the ID card making apparatus.

FIG. 10 is a diagram showing a circuit configuration of a temperature control circuit.

FIG. 11 is a perspective view for explaining a surface configuration of a coater roller.

[Explanation of symbols]

 6 ... Card medium 53 ... Coater roller 53a ... Groove part 53b ... No groove part P ... Coating liquid

Claims (13)

[Claims] 1. A coating device for coating a card medium with a coating liquid by using a coater roller, wherein the coater roller has a grooved portion in the circumferential direction of the surface and a grooveless portion in which the groove is not formed. A coating device comprising: 2. A coating apparatus for coating a card medium with a coating liquid by using a coater roller, wherein the coater roller has a groove portion in which a groove is formed in the circumferential direction of the surface and two or more grooves in which the groove is not formed. A coating device comprising a grooveless portion. 3. A coating device for coating a card medium with a coating liquid by using a coater roller, wherein the coater roller is grooved in a circumferential direction on its surface and a groove is formed with a material that repels the coating liquid. An applicator comprising a non-grooved portion. 4. A coating apparatus comprising a tank containing the coating liquid, a pickup roller for pumping the coating liquid from the tank, and a coater roller for receiving the coating liquid from the pickup roller and coating the coating liquid on a card medium. , A brush that contacts the coater roller and scrapes the coating liquid on the surface of the coater roller into the tank, a filter that strains the coating liquid scraped into the tank by this brush, and a coating liquid strained by this filter A coating device characterized by being pumped up by. 5. A coating device for coating a coating liquid on a card medium transported by using a coater roller, wherein a transport means for transporting the card medium and a transport position of the card medium transported by the transport means are detected. Detecting means, a second detecting means for detecting the rotational position of the coater roller, a conveyance position of the card medium detected by the first detecting means, and a rotating position of the coater roller detected by the second detecting means. And a control means for controlling the transportation of the card medium by the transportation means. 6. The conveying means comprises a conveying roller and a drive motor for rotationally driving the conveying roller via a clutch, and the control means turns the clutch on and off to control the card medium by the conveying means. The coating apparatus according to claim 5, which controls conveyance. 7. A coating device for coating a card medium with a coating liquid using a coater roller, comprising a flexible film sheet which is in contact with the coater roller and makes the coating liquid on the coater roller uniform. apparatus. 8. A coating device for coating a card medium with a coating liquid by using a coater roller, comprising two or more flexible film sheets which are in contact with the coater roller and make the coating liquid on the coater roller uniform. Characteristic coating device. 9. A coating device for applying a coating liquid to a card medium conveyed using a coater roller, comprising control means for controlling changes in the card medium conveyance speed and the coater roller rotation speed over time. A coating device characterized by. 10. A coating device for coating a coating liquid onto a card medium conveyed by using a coater roller, wherein first and second detecting means are provided on a card medium conveying path and detect conveyance of the card medium. And a control means for changing and controlling the conveyance speed of the card medium and the rotation speed of the coater roller according to the detection outputs of the first and second detection means. 11. A coating device comprising a tank containing the coating liquid, a pickup roller for pumping the coating liquid from the tank, and a coater roller for receiving the coating liquid from the pickup roller and coating the coating liquid on a card medium. In the tank, the detection means for detecting the temperature of the coating liquid in the tank, the heating means for heating the coating liquid in the tank, and the heating means are controlled according to the detection result of the detection means to keep the coating liquid in the tank at a constant temperature. A coating device comprising: 12. A coating device for coating a coating liquid on a card medium conveyed by using a coater roller, wherein the coating means is provided in contact with the heating means built in the coater roller and the coater roller, and detects the surface temperature of the coater roller. And a control unit that controls the heating unit according to the detection result of the detection unit to bring the surface temperature of the coater roller to a predetermined temperature. 13. A tank containing a coating solution, a pickup roller for pumping the coating solution from the tank, and a coater roller for receiving the coating solution from the pickup roller and applying the coating solution to a conveyed card medium. In the coating device, the detection means for detecting the humidity of the coating liquid in the tank based on the change in conductivity between the two electrodes in contact with the coating liquid, and the conveyance speed of the card medium according to the detection result of the detection means. A coating device comprising: a control unit that controls the rotation speed of the coater roller.