JP2007237396A - Printing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent various troubles generating at the plate delivering device of a printing equipment such as a stencil printing equipment employing UV cure type ink or the like from developing. <P>SOLUTION: This printing equipment has a controller 74, in which controlling is performed based on signals sent from an identifying sensor 72 of a kind of ink in a drum unit so as to put on a plate delivering UV lamp 26, a first plate delivering UV lamp 39 and a second plate delivering UV/LED 43 when the mounting of a printing drum unit for UV ink is detected, while to put off the plate delivering UV lamp 26, the first plate delivering UV lamp 39 and the second plate delivering UV/LED 43 when the mounting of a printing drum unit for non-UV ink is detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printing apparatus, and more particularly, to a printing apparatus including a stencil printing apparatus that performs stencil printing using an ultraviolet curable ink, and more specifically, to irradiate a used plate peeled from a printing drum with ultraviolet rays. The present invention relates to an ultraviolet irradiation device in a printing apparatus.

Among stencil printers, stencil printers (hereinafter referred to as “stencil printers”) have low running costs and can be printed at high speed, so various distributions and formats in the educational market, government agencies, associations, hospitals, etc. It is widely used for printing, and for obtaining printed materials in large numbers and multiple copies, such as newspaper advertisements, real estate advertisements, and private company correspondence. In order to make it easy for anyone to use it whenever they want to use it, the ink used for printing is usually an emulsion type ink that does not solidify in the air. There is no need to clean up each time. This ink for stencil permeates printing paper (an example of a medium to be printed, hereinafter referred to as “paper”) and is pseudo-dried, and the printed matter is hand-dried for undried ink immediately after printing. If it rubs, it will easily get dirty. This has been pointed out as a major problem of stencil printing apparatuses, but no effective countermeasures have been implemented yet.
The following proposals have been made as methods for improving the drying of printed matter.
That is, it has an ultraviolet ray (hereinafter abbreviated as “UV” except for those used in the claims, the means for solving the problems and the effect column), and uses UV curable ink. A stencil printing apparatus dedicated to UV curable ink that performs stencil printing and irradiates the obtained printed matter with UV is already known (see, for example, Patent Documents 1 and 2). Hereinafter, “ink” is referred to as ink in this specification.

Japanese Utility Model Publication No. 4-35188 JP-A-5-64878

However, in the techniques described in Patent Documents 1 and 2, printing is performed using UV curable ink (hereinafter sometimes referred to as “UV ink”), and the printed matter is applied to the printed matter by the UV irradiation device provided in the paper discharge conveyance unit. The main purpose is to obtain the immediate drying of the ink by UV irradiation. On the other hand, when UV ink is used, it is known that unique problems different from those of conventional emulsion inks occur due to the properties of UV ink.
That is, the monomers and oligomers in the components required for the currently known UV inks have very high reactivity, so it is necessary to consider the safety to the human body. If the UV ink is completely reacted and dried and solidified by UV irradiation, it becomes stable and safe. However, unreacted UV ink still has problems such as sensitivity to the human body. For example, specifically, when unreacted UV ink adheres to a human finger or the like, it has skin irritation, and thus it is necessary to wear protective gloves.
UV inks have a more or less specific odor. This odor is at a level where there is no problem if the reaction is completely caused by UV irradiation to dry and solidify, but it cannot be ignored with unreacted UV ink, and it is difficult to eliminate it.

By the way, in the stencil printing apparatus, the used master is peeled off from the printing drum and conveyed, and is stored in a stencil box and compressed. From the viewpoint of maintaining confidentiality, there is a need for a system that prevents others from obtaining print image information even when handling a used master (stencil sheet) peeled from a printing drum. For this purpose, there have conventionally been proposed a method for prohibiting additional printing, a method for prohibiting and locking the extraction of the printing drum, or a method for locking the extraction of the discharge box.
However, confidentiality is not sufficient with these methods. In addition, a method of finely cutting the discharged plate, a method of heat welding or chemical dissolution has been proposed, but these methods have problems in terms of safety and realization cost, and have not been realized. .

In addition, a used master cannot be prevented from being peeled and conveyed in a state where a considerably large amount of ink is adhered to one side thereof. If these inks are conventional emulsion inks, there is no particular problem even if they are contaminated during the processing or when the discharged plates are discarded.
However, in the case of UV ink, in consideration of safety to the human body, it is necessary to avoid touching the ink directly by hand as much as possible. Even so, it is very troublesome to wear protective gloves one by one as described above, so that it is required to prevent problems even if touched by hand, considering workability and immediacy.

Furthermore, in the case of UV ink, a problem has been pointed out that depending on the content of UV ink, the resin (plastic) part or rubber part of the mechanical device may act on and be eroded or altered. Therefore, there is a problem in that a part having a high possibility of adhesion of UV ink has a great restriction on material selection.
Incidentally, rubber and plastic materials are employed for the plate release roller and the transport roller of the plate release device in the stencil printing apparatus. For example, in the case of a general ABS resin, urethane resin, or urethane rubber, the UV ink adheres to the resin or rubber roller, and the portion softens, melts, or swells. It became clear from the confirmation test result by et al. Therefore, it is necessary to prevent the uncured UV ink from adhering to the resin and rubber parts arranged in the plate removal apparatus for a long period of time.

  Therefore, the main object of the present invention is to prevent the various troubles occurring in the plate discharging apparatus in the printing apparatus such as the stencil printing apparatus using the UV curable ink as described above. In addition, matters appropriately described in the embodiments and the like described later are also included in the object.

In order to solve the above-described problems and achieve the above object, the present invention employs the following means / invention specific matters (hereinafter referred to as “configuration”) in the invention of each claim. Is.
The invention according to claim 1 is a printing apparatus comprising a plate discharging means for peeling off and storing a used plate on a printing drum and capable of printing using an ultraviolet curable ink, and peeling from the printing drum. An ultraviolet irradiating means for irradiating ultraviolet rays to the surface of the used stencil where the ultraviolet curable ink is attached is disposed in the arrangement portion of the evacuating means.

  A second aspect of the present invention is the printing apparatus according to the first aspect, wherein the ultraviolet curable type is provided with ultraviolet irradiating means for the printing medium for irradiating the printed medium with ultraviolet rays, and ultraviolet curable ink. An attachment / detachment means for selectively attaching / detaching an ink printing drum and a non-ultraviolet curable ink printing drum mounted with a non-ultraviolet curable ink to a printing apparatus main body, and the printing via the attachment / detachment means The printing drum mounted on the apparatus main body is either the ultraviolet curable ink printing drum or the non-UV curable ink printing drum, or the ink mounted on the printing drum is the ultraviolet curable ink or the An ink type detecting means for detecting which of the non-ultraviolet curable ink and the ultraviolet curable ink printing dosimeter by the ink type detecting means. Or when the UV curable ink is detected, the UV irradiation means for the printing medium and the UV irradiation means for discharging the plate are operated to attach the non-UV curable ink printing drum or the non-UV curable ink. And a first control unit that disables the ultraviolet irradiation unit for the printing medium and the ultraviolet irradiation unit for discharging the plate when ink is detected.

  According to a third aspect of the present invention, in the printing apparatus according to the first or second aspect, the plate discharging means is conveyed by a peeling conveying means that peels and conveys a used plate from the printing drum, and the peeling conveying means. A waste plate storing means for storing the used plate, and the UV irradiating means for discharging the plate is on a plate discharging path between the peeling and conveying means and the waste plate storing means, and the UV of the used plate. It is characterized in that it is a first ultraviolet irradiating means for discharging the plate disposed so as to irradiate ultraviolet rays on the surface of the curable ink adhering surface.

  According to a fourth aspect of the present invention, in the printing apparatus according to the third aspect, the plate is composed of a thermoplastic resin film and a porous support, and the first ultraviolet irradiation means for discharging the plate is used as the porous plate of the used plate. It arrange | positions so that an ultraviolet-ray may be irradiated to the conductive support surface side.

  According to a fifth aspect of the present invention, in the printing apparatus according to any one of the first to fourth aspects, the discharged plate means includes a discharged plate storage means for storing a used plate peeled from the printing drum. The ultraviolet irradiating means for discharging the plate is a second ultraviolet irradiating means for discharging the plate disposed in the vicinity of the discharged plate storing means so as to irradiate the used plate stored in the discharged plate storing means with ultraviolet rays. It is characterized by that.

  According to a sixth aspect of the present invention, in the printing apparatus according to any one of the first to fourth aspects, the discharged plate means includes a discharged plate storing means for storing a used plate peeled from the printing drum, A waste plate compression means for compressing a used plate stored in the plate release storage means, and the ultraviolet irradiation means for discharging the plate irradiates ultraviolet rays toward the used plate stored in the plate release storage means. In this way, it is the second ultraviolet irradiating means for discharging the plate disposed in the discharged plate compression means.

  According to a seventh aspect of the present invention, in the printing apparatus according to the sixth aspect, the discharged plate compression means abuts a used plate stored in the discharged plate storage means and compresses the compressed plate, and the compressed position. It is configured to be displaceable between an uncompressed position separated from the squeezed plate, and the discharged plate compressing means is ultraviolet transmissive when occupied in the compressed position, and is used in the used discharged plate storing means. It has a net-like portion that abuts on the plate and compresses, and the second ultraviolet irradiating means for discharging the plate is arranged in the net-like portion.

  According to an eighth aspect of the present invention, in the printing apparatus according to the sixth or seventh aspect, after the used plate compression means is used to compress the used plate stored in the discharged plate storage means, the compressed state is maintained for a predetermined time. The second control means is characterized in that it has a second control means for irradiating the used plate in the compressed state with ultraviolet rays for a predetermined time as a second discharge ultraviolet irradiation means.

  According to a ninth aspect of the present invention, in the printing apparatus according to any one of the first to eighth aspects, the plate removing means is detachable from the main body of the printing apparatus for storing the peeled used plate. The printing apparatus main body is provided with a locking means for restricting detachment of the printing plate storage means from the printing apparatus main body. The ultraviolet irradiation means for discharging the plate and the first ultraviolet light for discharging the plate Third control for prohibiting detachment of the discharged plate storage means from the printing apparatus main body during the ultraviolet irradiation by at least one of the discharged ultraviolet irradiation means and the irradiation means and the second discharged ultraviolet irradiation means. Means are provided.

  According to a tenth aspect of the present invention, in the printing apparatus according to the first aspect, the discharging plate means includes a discharging plate winding means for winding and storing the peeled used plate, and a winding for rotating the discharging plate winding means. Drive means, and the winding drive means is rotated so that the discharged plate winding means rotates for a predetermined time after winding of the used plate by the discharged plate winding means is completed. And a fourth control means for controlling the ultraviolet irradiation means for discharging the plate for a predetermined time so as to irradiate the attached surface of the used plate with the ultraviolet curable ink on the discharged plate winding means for a predetermined time. It is characterized by that.

According to the present invention, it is possible to provide a novel printing apparatus that solves the problems of the conventional printing apparatus as described above and the aforementioned problems. The effects for each claim are as follows.
According to the present invention, in a printing apparatus capable of performing printing using ultraviolet curable ink, ultraviolet rays are applied to the ultraviolet curable ink adhering surface of a used plate peeled from a printing drum. Since the UV irradiating means for evacuation is provided in the arrangement section of the evacuation means, it becomes possible to irradiate the UV curable ink attached to the used plate by UV irradiation and to cure it. Even when the user touches the UV curable ink that has been cured, the safety can be ensured. In addition, it is possible to prevent the resin parts and rubber parts constituting the plate discharging means (for example, the plate discharging device) from being eroded or altered by being in contact with the ultraviolet effect ink for a long time. In addition, by curing the UV curable ink attached to the used plate, the compressed used plate will be in close contact with each other, and it will be difficult to peel it off and check its contents. (Claim 1).

  According to the second aspect of the present invention, the first control means includes the ultraviolet irradiation means for the print medium when the ink type detection means detects the installation of the ultraviolet curable ink printing drum or the ultraviolet curable ink, and Since the ultraviolet irradiation means for evacuation is operated and the ultraviolet irradiation means for printing medium and the ultraviolet irradiation means for evacuation are deactivated when a non-UV curable ink printing drum is mounted or when a non-UV curable ink is detected, Even when the “ultraviolet curable ink printing drum” and the “non-ultraviolet curable ink printing drum” are attached and detached, the ultraviolet irradiation means for the printing medium and the first ultraviolet irradiation means for the discharged printing plate operate properly and operate. Can be improved. Accordingly, while aiming to improve the drying of printed medium (printed matter) printed with ultraviolet curable ink by ultraviolet irradiation by the ultraviolet irradiation means for printing medium and the effect by ultraviolet irradiation means for discharging the plate, it is mistakenly non-printing. It is possible to prevent the ultraviolet irradiation by the ultraviolet irradiation means for the printing medium and the ultraviolet irradiation means for discharging the plate while the ultraviolet curable ink printing drum is mounted.

  According to the invention described in claim 3, the ultraviolet irradiation means for discharging the plate is disposed on the discharging plate path between the peeling and conveying device and the discharging plate storing means, and is disposed on the surface of the used plate on which the ultraviolet curable ink is attached. By using the first ultraviolet irradiating means for discharging the plate disposed so as to irradiate the ultraviolet rays, it is possible to reliably irradiate the ultraviolet rays with respect to the ultraviolet curable ink adhering to the adhesion surface side of the ultraviolet curable ink of the used plate. The effective curing can be obtained in a short time.

  According to the invention described in claim 4, the plate is composed of a thermoplastic resin film and a porous support, and the first ultraviolet irradiating means for discharging the plate is irradiated with ultraviolet rays on the porous support surface side of the used plate. Since it is arranged so that ultraviolet rays can be reliably applied to the ultraviolet curable ink adhering to the porous support surface side of the used plate, effective curing can be obtained in a short time. be able to.

  According to the invention described in claim 5, the UV irradiating means for discharging the plate is a second discharging plate disposed in the vicinity of the discharged plate storing means so as to irradiate ultraviolet rays toward the used plate stored in the discharged plate storing means. By using the ultraviolet irradiation means for use, it is possible to irradiate the used plate stored in the discharged plate storing means with ultraviolet rays and, for example, the operation of the discharged plate compression means (for example, compression plate) constituting the discharged plate means (for example, discharged plate apparatus). Since the second ultraviolet irradiating means for discharging the plate can be arranged at a position not interfering with the area, and the second ultraviolet irradiating means for discharging the plate can be arranged at a position that does not adversely affect the attaching / detaching operation of the discharged plate storing means. Miniaturization and cost reduction can be achieved.

  According to the sixth aspect of the present invention, the UV irradiating means for discharging the plate is a second UV irradiating plate disposed in the discharging plate compressing means so as to irradiate the used plate stored in the discharging plate storing means with ultraviolet rays. By using the irradiation means, it is possible to irradiate the used plate stored in the discharge plate storage means with ultraviolet rays from a closer position, so that the effective ultraviolet irradiation efficiency can be increased, and the second ultraviolet irradiation means for discharging the plate is made compact. And cost reduction. Further, since the curing rate of the ultraviolet curable ink by ultraviolet rays increases as the distance between the second ultraviolet irradiating means for discharging the plate and the object decreases, the ultraviolet irradiation time can be shortened.

  According to the seventh aspect of the present invention, the discharged plate compressing means has a net-like portion that is ultraviolet transmissive when it occupies the compression position and compresses in contact with the used plate stored in the discharged plate storing means. Since the second ultraviolet irradiating means for discharging the plate is disposed in the mesh portion, in addition to the effect of the invention of claim 6, the mesh portion has an intensity sufficient to compress the used plate, Can prevent the used plate from adhering to the surface of the discharge plate compression means or the second discharge plate ultraviolet irradiation means due to the viscosity of the UV curable ink. Can do.

  According to the invention described in claim 8, after the second control means compresses the used plate stored in the discharged plate storing means by using the discharged plate compressing means, the compressed state is held for a predetermined time, In addition to the effect of the invention according to claim 6 or 7, by using the second discharging ultraviolet irradiation means for irradiating the used plate in a compressed state with ultraviolet rays for a predetermined time, it is inexpensive, compact and has a relatively small amount of ultraviolet rays. Even if an ultraviolet light source such as a light-emitting diode (LED) is used as the second UV irradiating means for discharging the plate, sufficient UV irradiation time can be taken. It is possible to give a total light amount sufficient for curing to the mold ink. Further, since the ultraviolet curable ink is cured and brought into close contact with the used plate while the used plate is compressed, the used plate cannot be opened again and viewed, and confidentiality can be maintained.

  According to the ninth aspect of the present invention, the third control means is at least one of the ultraviolet ray irradiating means for discharging the plate, the first ultraviolet ray irradiating means for discharging the plate, and the second ultraviolet ray irradiating means for discharging the plate. During the ultraviolet irradiation, a locking unit is used to prohibit the removal of the discharged plate storage unit from the printing apparatus main body, whereby at least one of the discharged plate ultraviolet irradiation unit, the first discharged plate ultraviolet irradiation unit, and the second discharged plate ultraviolet irradiation unit. While the ultraviolet ray irradiation by one discharge plate ultraviolet irradiation means is being performed, the discharge plate storage means is mistakenly detached from the printing apparatus main body, and at that time, the discharge plate ultraviolet irradiation means, the first discharge plate ultraviolet irradiation means, and the second discharge plate ultraviolet irradiation means The ultraviolet rays from at least one of the ultraviolet irradiating means for evacuating the plate are exposed to the outside and hit the user's hand, eyes or body, causing a safety or health problem. It is possible to prevent the Rukoto in advance.

  According to the tenth aspect of the present invention, the fourth control means allows the discharged plate winding means to rotate for a predetermined time even after the winding of the used plate is completed by the discharged plate winding means. And controlling the first UV irradiating means for discharging the plate for a predetermined time so as to irradiate the UV curable ink adhering surface of the used plate on the discharged plate winding means for a predetermined time. This makes it possible to uniformly and uniformly irradiate the surface with ultraviolet rays while winding the used plate into, for example, a cylindrical shape, thereby increasing the reliability of curing of the ultraviolet curable ink. In addition, after the winding is completed, while the discharge plate winding means is rotated as it is, the ultraviolet irradiation is continuously performed by the ultraviolet irradiation means for discharging the plate, so that the ultraviolet light adhered to the used plate on the outermost peripheral surface on the discharge plate winding means. Since curing of the curable ink becomes more reliable, even if the user touches it at the time of disposal, it is not necessary to consider the safety and health of the human body. Moreover, even if an ultraviolet light source such as a light emitting diode (LED), which is inexpensive and compact and has a relatively small amount of ultraviolet light, is used as the ultraviolet irradiation means for discharging the plate, it is possible to take sufficient ultraviolet irradiation time. It is possible to give a total amount of light sufficient for curing to the ultraviolet curable ink attached to the plate. In addition, while the used plate is wound up, the UV curable ink attached to the used plate is cured and adhered together with the used plate, so that the used plate cannot be opened again for viewing. Confidentiality can be maintained.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention (hereinafter referred to as “embodiments”) including the best mode for carrying out the present invention and examples will be described below with reference to the drawings. Constituent elements such as members and components having the same function and shape throughout the embodiment and the modified examples are given the same reference numerals and will not be described after being described once. In order to simplify the drawings and the description, even components that are to be represented in the drawings may be omitted as appropriate without being specifically described in the drawings. When a constituent element such as a published patent gazette is cited and explained as it is, the reference numeral is attached with parentheses to distinguish it from each embodiment.

(First embodiment)
First, a stencil printing apparatus 100 as an example of a printing apparatus according to a first embodiment of the present invention will be described with reference to FIG. Other than the various UV (ultraviolet) irradiation devices specific to the present embodiment are well known to those skilled in the art, and will be briefly described together with their operations.
As shown in FIG. 1, the stencil printing apparatus 100 separates and feeds sheets S as an example of a printing medium stacked on the paper feed tray 2 one by one, and feeds the sent one sheet S. A paper feed unit 3 that feeds to the stencil printing unit 6 at a predetermined timing, and a stencil printing unit 6 as a printing unit that performs stencil printing on the paper S fed at a predetermined timing between the printing drum 4 and the press roller 5; A paper discharge unit 7 that discharges and conveys the paper S on which a print image is formed by stencil printing, and a used master 8a as a used plate on the printing drum 4 (hereinafter referred to as “used master 8a”). And a plate discharging unit 10 in which a plate discharging device 9 is disposed as a plate discharging means for automatically separating and storing the sheet). In FIG. 1, reference numeral 101 denotes a main body frame as a printing apparatus main body that forms the framework of the stencil printing apparatus 100. Here, the plate discharging unit 10 includes the plate discharging device 9 and also includes the vicinity of the arrangement portion of the plate discharging device 9.
In the figure facing the plate discharging unit 10 with the printing drum 4 interposed therebetween, a plate making apparatus in which a well-known plate making apparatus for making a plate for stencil printing on the master 8 serving as a plate and feeding the printing drum 4 is disposed is arranged on the upper right side. A plate feeding unit 1 is provided. In addition, a plurality of stencil printing apparatuses constitute a stencil printing system, and only the stencil printing apparatus performs the stencil printing by moving the printing drum unit configured to be detachable with respect to each stencil printing apparatus main body. It should be noted that there may be a configuration in which the plate making and feeding unit 1 is removed from the apparatus configuration of FIG. 1 in which the printing drum unit is moved and mounted to perform only the plate discharging operation and the printing operation.

In this embodiment, the master 8 is a porous support made of a thermoplastic resin film made of, for example, a polyester film, and a Japanese paper fiber that is permeable to UV curable ink (UV ink) or ordinary non-UV curable ink (non-UV ink). Laminate structure with body bonded with adhesive. The thermoplastic resin film has a thickness of about 0.5 to 5 μm, and the master 8 has a total thickness of about 0.5 to 60 μm.
As the porous support, in addition to those described above, synthetic fibers or a mixture of Japanese paper fibers and synthetic fibers may be used. Further, for example, a heat-sensitive stencil master proposed in Japanese Patent Laid-Open No. 10-147075, which has already been put into practical use, that is, its thickness is relatively thinner than that of the conventional one, and its strength is relatively low, and its bending stiffness is high. A master having a characteristic of 5 mN or more, or a master substantially consisting only of a thermoplastic resin film is also used as appropriate.

  The paper feed unit 3 feeds the uppermost paper S stacked on the paper feed tray 2 in the paper transport direction X (the print medium transport direction) and the paper S sent out by the call roller 11 one by one. The separation roller 11A and the separation pad 11B that are separated and sent in the paper conveyance direction X, and the one sheet S that is arranged and sent downstream of the separation roller 11A in the paper conveyance direction X at a predetermined timing. And a pair of upper and lower registration rollers 12, 12 (hereinafter referred to as "registration roller pair 12"), and a sheet S disposed in a sheet conveyance path extending from the separation roller 11A to between the printing drum 4 and the press roller 5. It has a guide plate and the like (not shown).

The stencil printing unit 6 includes the printing drum 4 and the press roller 5 described above. The printing drum 4 includes a porous cylindrical plate cylinder 4a around which a pre-made master 8 is wound and mounted on an outer peripheral surface thereof, and a single line of the plate cylinder 4a for clamping and holding the front end of the pre-made master 8. And a master clamper 13 that can be freely opened and closed. The plate cylinder 4a has a porous structure through which UV ink and normal non-UV ink can pass. The printing drum 4 is rotationally driven in the direction of the arrow in the figure by a drive mechanism (not shown) having a main motor (not shown). Hereinafter, for the sake of simplicity of explanation, the “plate cylinder 4 a” is sometimes simply referred to as the outer peripheral portion or the outer peripheral surface of the printing drum 4.
The press roller 5 is configured to be freely contacted and separated from the outer peripheral surface of the printing drum 4 via a contact / separating means (not shown). With respect to the printing drum 4 wound around the outer peripheral surface of the master 8 that has been subjected to plate making, It has a function as a pressing means that rotates following the sheet S sent from the registration roller pair 12 at a predetermined timing. As the pressing means, an impression cylinder that has the same outer diameter as the printing drum 4 and rotates at a peripheral speed equal to the peripheral speed of the printing drum 4 is also used.

  Inside the printing drum 4, an ink roller 14 that is rotated in synchronization with the rotation of the printing drum 4, parallel to the ink roller 14, and in the direction of the rotation center axis of the printing drum 4 with a slight gap. A doctor roller 14A disposed along the ink roller 14A, and an ink supply pipe 15 for supplying UV ink or ordinary non-UV ink toward an ink reservoir 14B formed between the ink roller 14 and the doctor roller 14A. An ink supply device is provided.

The printing drum 4 constitutes a drum unit integrated with the ink supply device and an ink container (ink pack) and an ink supply pump (not shown), and can be attached to and detached from the main body frame 101 with a simple operation. It is like that. Then, a UV ink printing drum unit equipped with a UV curable ink printing drum (hereinafter referred to as “UV ink printing drum”) to which UV curable ink was attached, and a normal non-UV curable ink were installed. The non-UV ink printing drum unit provided with a non-UV curable ink printing drum (hereinafter referred to as “non-UV ink printing drum”) is set separately from each other, and each of the main body frames 101 via the attaching / detaching means. It is comprised so that attachment or detachment is possible.
Specific examples of the attaching / detaching means or attaching / detaching mechanism (not shown) for selectively attaching / detaching the UV ink printing drum unit and the non-UV ink printing drum unit to / from the main body frame 101 include, for example, Japanese Utility Model Laid-Open No. 61-85462. The same plate cylinder supporting apparatus as shown in FIGS. 1 to 4 of the publication is employed. In addition, for example, holding means (36), gripping frame (50), front frame (51), and rear frame shown in FIG. 2 and FIG. (52) or the like may be used.

FIG. 2 shows an ink type detecting means for detecting whether the main body frame 101 in the vicinity of the attaching / detaching means is a UV ink printing drum unit or a non-UV ink printing drum unit attached via the attaching / detaching means. A drum unit ink type identification sensor 72 is provided. Specific examples of the drum unit ink type identification sensor 72 include, for example, a combination of an electrical connector (for example, male) disposed on the printing drum unit side and an electrical connector (for example, female) disposed on the main body frame 101 side. The control device 74 shown in FIGS. 1 and 2 employs a device that electrically detects and determines the difference.
The ink type detection means is not limited to the drum unit ink type identification sensor 72, and may be a method of detecting the type of an ink container (ink pack) mounted / mounted on the printing drum unit side. Therefore, the ink type detecting means for detecting whether the UV ink printing drum unit or the non-UV ink printing drum unit is mounted via the attaching / detaching means should also be called a printing drum detecting means.

  Here, it is assumed that a UV ink printing drum unit is mounted on the main body frame 101. In this case, when the paper S is fed to the stencil printing unit 6 by the operation of the paper feeding unit 3, a UV ink printing drum (hereinafter referred to as “a discriminator as much as possible) is wound around the master 8 that has been subjected to plate making. When the press roller 5 presses the sheet S against the printing drum 4), the UV ink is transferred to the inner peripheral surface of the printing drum 4 (the inner periphery of the plate cylinder 4 a) by the ink roller 14 of the ink supply device inside the printing drum 4. The UV ink that has been supplied to the surface and passed through the perforated portion of the master 8 that has been subjected to the plate making process is transferred and transferred to the surface of the paper S, whereby a predetermined stencil printing image is formed.

  The paper S on which stencil printing has been performed by the stencil printing unit 6 is forcibly separated from the master 8 already made on the printing drum 4 by the separation claw 16 and the air pressure from the air discharge fan 17 in the paper discharge unit 7. Further, the paper is conveyed by the paper discharge conveying device 18 in the left direction in the figure. The paper discharge conveying device 18 is connected to the rear roller 20 via a belt driving force transmission means, and an endless belt 21 made of a plurality of thin metal plates stretched between a front roller 19 and a rear roller 20. A drive motor 22 that rotates the endless belt 21 by rotating the roller 20, and an air suction duct 23 and an air suction fan 24 for sucking the back surface of the printed paper S and bringing it into contact with the endless belt 21. .

In the vicinity of the upper side of the paper discharge transport device 18, a UV irradiation device for paper discharge provided with an ultraviolet irradiation source for the print medium as UV irradiation means for the print medium for irradiating UV onto the print image surface of the printed paper S. 25 is arranged.
The discharge UV irradiation device 25 includes, for example, a UV lamp 26 as an ultraviolet irradiation source for a printing medium such as a high-pressure mercury lamp or a metal halide lamp, a reflection plate 27 that is formed of an aluminum plate or the like and reflects UV, and a reflection plate 27. And a metal cover casing 28 for preventing UV leakage. Further, the discharge UV irradiation device 25 sucks air in the cover casing 28, passes it through an ozone filter (not shown), and discharges it outside the main body frame 101. A suction fan (both not shown) and the like are also provided.
As described above, the paper discharge unit 7 mainly includes the peeling claw 16, the air discharge fan 17, the paper discharge conveyance device 18, the paper discharge UV irradiation device 25, the paper discharge tray 29, and the like.

  At this time, it is determined that the printed paper S conveyed by the paper discharge conveying device 18 is printed with the UV ink printing drum unit mounted on the basis of the signal from the drum unit ink type identification sensor 72. After the UV lamp 26 is turned on and turned on and irradiated with UV in accordance with a command from the control device 74 shown in FIGS. 1 and 2, the fixed sheet Sa is fixed and becomes a fixed sheet Sa. The tips are aligned while being received by the end fence 30, and are neatly discharged / dropped onto a paper discharge tray 29 serving as a paper discharge table, and loaded and accommodated.

On the other hand, when the printing drum unit for non-UV ink is mounted on the main body frame 101, when the sheet S is fed to the stencil printing unit 6 by the operation of the sheet feeding unit 3, the master 8 that has been subjected to plate making is wound. When the press roller 5 presses the paper S against the non-UV ink printing drum, the normal non-UV ink is supplied to the inner peripheral surface of the printing drum 4 by the ink roller 14 of the ink supply device inside the printing drum 4. Further, the non-UV ink that has passed through the perforated portion of the master 8 that has been subjected to plate making is transferred and transferred to the surface of the paper S, whereby a predetermined stencil printing image is formed.
At this time, it is determined that the printed sheet S conveyed by the paper discharge conveying device 18 is printed with the non-UV ink printing drum unit mounted on the basis of the signal from the drum unit ink type identification sensor 72. In response to a command from the control device 74, the UV lamp 26 is turned on / off so that it is not subjected to UV irradiation, and its front end is received by the end fence 30 to be aligned, and is discharged neatly onto the discharge tray 29. -Dropped and loaded.

Next, the periphery of the plate removal unit 10 having a configuration unique to the present embodiment will be described in detail.
The plate removal device 9 disposed in the plate removal unit 10 includes a plate removal peeling roller 32 as a peeling conveyance means for peeling and conveying the used master 8a from the outer peripheral surface of the printing drum 4, and a used master 8a peeled off by the plate removal peeling roller 32. The upper belt 35 and the lower belt 36 (guide means) that are stretched between a first discharge plate conveyance roller pair 33a, 33b and a second discharge plate conveyance roller pair 34a, 34b as conveyance means for conveying the toner toward the plate release box 37. ), A plate discharge box 37 as a plate discharge storage means for storing the used master 8a conveyed and guided by the roller pair, the upper belt 35 and the lower belt 36, and the inside of the plate discharge box 37 is moved downward in FIG. Then, ascending / descending itself as a discharged plate compression means for compressing the used master 8a stored in the discharged plate box 37 and increasing the stored amount thereof. It is mainly composed of Do compression plate 38..

The discharged plate peeling roller 32 includes, for example, a swing arm (3), a support shaft (4), a spring (7), and a solenoid (8) shown in FIGS. 1 and 2 of Japanese Utility Model Laid-Open No. 63-112053. The used master 8a on the printing drum 4 is peeled off and conveyed by a swinging contact / separation means (swinging contact / separation mechanism) similar to the stopper (9). The discharged plate peeling roller 32 is rotationally driven in the direction of the arrow in FIG. 1 by a discharged plate driving means (not shown) such as a discharged plate motor via a driving force transmitting means (not shown). By the rocking contact / separation means, the discharge plate peeling roller 32 abuts the outer peripheral surface of the printing drum 4 with the standby position indicated by a solid line in FIG. It selectively occupies the peeling position indicated by the two-dot chain line in FIG.
The upper belt 35 and the lower belt 36 are endless and made of metal having flexibility, and are respectively a first discharge plate conveying roller pair 33a, 33b rotatably supported on the main body frame 101 side. It is stretched between the second discharge plate conveying roller pair 34a, 34b. One of the first plate discharge roller pairs 33a and 33b is connected to the plate discharge motor as roller drive means via drive force transmission means such as a gear. The upper belt 35 and the lower belt 36 are not planar flat belts such as the endless belt 21 used in the paper discharge conveyance device 18, but are formed in a linear shape (wire shape), so that UV is well transmitted. .

  A master detection sensor 81 for detecting whether or not the rear end of the used master 8a that has been peeled and conveyed has passed through the second discharged plate conveying roller pair 34a and 34b is located near the left in the drawing of the second discharged plate conveying roller 34a. It is fixed on the main body frame 101 side. The master detection sensor 81 is composed of, for example, a reflective photosensor.

The compression plate 38 is driven up and down by an elevating drive means similar to the elevating mechanism of the compression plate (60) shown in FIG. 7 of JP-A-5-286223 and described in paragraphs “0036” to “0037”, for example. Is done. That is, the compression plate 38 occupies a non-compression position (home position) located near the upper portion of the discharge box 37 during the non-compression operation as shown by hatching in FIG. Reciprocating up and down so as to occupy a compression position for moving the used master 8a stored in the discharge box 37 by moving downward by the operation of lifting and lowering drive means such as a rack and pinion mechanism with 80 It is configured. The compression plate 38 and the raising / lowering driving means are disposed on the plate removal side plate on the main body frame 101 side.
The compression plate lifting / lowering motor 80 is constituted by a DC motor capable of forward and reverse rotation, for example, when the load on the motor 80 increases, the current flowing through the motor 80 increases in proportion.
When the compression plate 38 occupies the uncompressed position, the uncompressed position is detected by a home position sensor (not shown). The fact that the compression plate 38 has occupied the compression position is the same control content as described in paragraph “0036” of the above-mentioned Japanese Patent Application Laid-Open No. 5-286223, that is, in the present embodiment, the compressed master 8a that has been compressed. As the repulsive force increases, the load on the compression plate lifting / lowering motor 80 that lowers the compression plate 38 increases, and the current flowing through the motor 80 also increases proportionally. The controller 74 shown in FIG. 2 monitors and determines the magnitude of the current flowing through the compression plate lifting / lowering motor 80 via a motor drive circuit (not shown), so that the compression plate lifting / lowering motor 80 is compressed when the load becomes a certain level. Control is performed to stop energization of the plate lifting / lowering motor 80. Therefore, the detection of the compression position of the elevating type compression plate 38 as in the present embodiment is possible without providing special position detection means such as a compression plate bottom dead center sensor. A compression position may be detected by providing a compression plate bottom dead center sensor or the like.

The plate removal box 37 has a substantially box shape, is unitized, and is detachable from the main body frame 101. As shown in FIGS. 1 and 3, the discharged plate box 37 is formed with a locked portion 37 a as a locked member that selectively engages with a locking member, which will be described later, integrally standing on the outer peripheral wall of the box body. In addition, a handle or the like (not shown) that is attached and detached by the user is also integrally formed.
The lower platen 37 is inserted into the main body frame 101 as shown by the solid line in FIG. 1 while the lower wall surface thereof is supported and guided by an attaching / detaching means fixed to the main body frame 101 or a guide rail member 96 as a guiding means. Between the mounting position at which the plate can be stored and locked, and the non-mounting position at which the used master 8a taken out and compressed in the thick arrow direction Xa on the left side in FIG. It is slidable in the direction Xa and the opposite direction, and can be inserted and removed (detachable). When the discharge box 37 is taken out and removed from the main body frame 101, the compression plate 38 is raised to the uncompressed position shown in FIG. 1 so as to remain on the main body frame 101 side.

When the plate release box 37 is mounted in the main body frame 101, as shown schematically in FIG. 1 by a broken line and specifically shown in FIG. 3, the release box 37 is prevented from being separated from the main body frame 101. A locking device 90 as a locking means is arranged.
A lock device 90 shown in FIG. 3 includes a lock portion 91a that engages with a locked portion 37a formed on the plate release box 37 at one end, and a lock lever as a lock member that can swing and displace about a fulcrum shaft 92. 91, the fulcrum shaft 92 rotatably supported within a predetermined angle range by a platen side plate (not shown) on the main body frame 101 side, and the engaged / locked state of the locked portion 37a and the lock portion 91a. A tension spring 93 as a biasing means that constantly biases the lock portion 91a in the clockwise swinging direction in the drawing, which is a direction to be released, and a plunger 94a, and a pin 95 on the other end of the lock lever 91 are provided. And a locking solenoid 94 as a loosely coupled lock driving means.

  One end of the tension spring 93 is locked to the lock lever 91 between the lock 91a and the fulcrum shaft 92, and the other end is locked to the platen plate side plate. The locking solenoid 94 is a pull-type DC solenoid, and is loosely connected to the other end of the lock lever 91 by a pin 95 via a plunger 94a that is an operating member. The solenoid for locking 94 is fixed to the platen side plate. The locked portion 37a and the lock portion 91a are provided at respective positions where they can be engaged with each other when the plate discharging box 37 is mounted and set in the main body frame 101 and occupies the mounting position.

Here, the operation of the locking device 90 for locking the plate ejection box 37 will be described. As shown in FIG. 3, when the discharge box 37 occupies the mounting position and is energized to the locking solenoid 94 and turned on, the plunger 94a is subjected to the urging force of the tension spring 93 as shown by the solid line in FIG. As a result, the lock portion 91a of the lock lever 91 swings counterclockwise about the fulcrum shaft 92, and with this swing, the lock portion 91a and the locked portion 37a of the plate ejection box 37 are swung. By engaging, the plate release box 37 is locked and fixedly held at the mounting position, and therefore it cannot be removed in the arrow direction Xa and detached from the main body frame 101.
On the other hand, when energization of the locking solenoid 94 is cut off while the plate removal box 37 occupies the mounting position, one end of the lock lever 91 is centered on the fulcrum shaft 92 by the urging force of the tension spring 93. And the engagement state between the lock portion 91a and the locked portion 37a of the plate discharging box 37 is released along with this swinging, so that the plate discharging box 37 slides in the arrow direction Xa in FIG. This makes it possible to remove the plate release box 37 from the main body frame 101.

The used master 8a peeled and conveyed from the outer peripheral surface of the printing drum 4 rotating in the direction of the arrow in FIG. 1 is the side on which the upper surface side indicated by the arrow in FIG. Or since it becomes the adhesion surface 8b of normal non-UV ink, a large amount of UV ink or normal non-UV ink is adhered to this adhesion surface 8b.
As described above, the master 8 has a structure in which, for example, a thermoplastic resin film made of a polyester film and a porous support made of a Japanese paper fiber are bonded and bonded. 8b is a surface on the porous support side made of Japanese paper fiber.

Therefore, after the UV ink printing drum unit is mounted on the main body frame 101 and UV ink is used for printing on the UV ink printing drum, it is peeled off from the printing drum 4 when a new plate making is performed. Use between the first discharging plate conveying roller pair 33a, 33b and the second discharging plate conveying roller 34a, 34b in order to UV cure the UV ink adhering to the adhering surface 8b of the used master 8a to be discharged. UV irradiating means for evacuating plate, and first irradiating UV irradiating device as first irradiating UV irradiating means for evacuating plate, which is provided with a first irradiating UV irradiating source for irradiating UV onto the adhering surface 8b of the master 8a. 31 is disposed and provided in the plate removal portion 10 on the main body frame 101 side.
That is, the ultraviolet irradiation means for discharging the plate according to the present embodiment is on the plate discharging path between the printing drum 4, more specifically, the plate releasing roller 32 and the plate discharging box 37, and the UV ink adhesion surface 8 b of the used master 8 a. It is characterized by the first UV irradiating device 31 for discharging the plate disposed so as to irradiate the side with UV.

  The first UV irradiating device 31 for evacuating the plate includes a first evacuating UV lamp 39 serving as a first evacuating UV irradiation source such as a high-pressure mercury lamp and a metal halide lamp, and a first UV lamp 39 for evacuating the plate formed of an aluminum plate or the like. The reflecting plate 40 for efficiently irradiating the adhesion surface 8b of the used master 8a by reflecting UV from the reflecting plate 40 and a metal cover casing 41 provided outside the reflecting plate 40 are provided.

The plate discharging device 9 of the plate discharging unit 10 includes a second ultraviolet irradiation means for discharging a plate, a second ultraviolet irradiation source for discharging the plate, and a second ultraviolet irradiation source for irradiating UV toward the used master 8 a stored in the discharging box 37. A second UV irradiating device 44 for evacuating the plate as an ultraviolet irradiating means for evacuating the plate is disposed in the evacuating box 37. When the plate discharging box 37 occupies the compression position, the plate discharging box 37 has a net-like pressing portion 42 as a net-like portion that is UV transmissive and compresses in contact with the used master 8a stored in the plate discharging box 37. The mesh-shaped pressing portion 42 is formed of a metal wire by providing a clearance from the surface of the compression plate 38 below the compression plate 38. The mesh-shaped pressing portion 42 is set so as to sufficiently transmit UV while having a strength sufficient to compress the used master 8a, and to prevent the used master 8a from adhering to the viscosity of the UV ink. Yes.
More specifically, the second plate UV irradiation device 44 is provided between the lower portion of the compression plate 38 and the mesh-like pressing portion 42. That is, the second UV irradiating device 44 for discharging the plate is disposed on the mesh pressing portion 42.

  The second UV irradiating device 44 is a system in which a plurality of compact UV-LEDs (ultraviolet light-emitting diodes) 43 serving as the second UV irradiating source are disposed side by side. It is arranged so that it can emit light and irradiate towards. Here, since the UV LED 43 does not reach a high temperature, the compression plate 38 may be made of resin in addition to metal.

Next, with reference to FIG. 2, the control configuration of the main part of the stencil printing apparatus 100 will be described.
An operation panel 76 shown in FIG. 2 includes a plate making start key (not shown) for starting a series of operations including a well-known plate discharging operation and plate making operation, and a set number of regular prints corresponding to the set number of prints. Display / notify or change various setting conditions such as a printing start key (not shown) for starting a printing operation, a numeric keypad (not shown) for setting the number of printed sheets, and plate making / printing setting conditions A liquid crystal display unit (not shown) composed of a liquid crystal display device serving as warning display means / warning notification means for enabling or displaying warnings / notifications such as jams and various errors is provided.
In the liquid crystal display section, for example, display sections such as “ink”, “paper”, “paper type”, “image type” and the like are displayed at any time by the hierarchical display structure. The ink type display is automatically displayed on the section based on the detection result from the drum unit ink type identification sensor 72.

  In FIG. 2, a control device 74 for controlling each device and each part specific to this embodiment in the stencil printing apparatus 100 includes a CPU (central processing unit), an I / O (input / output) port, a ROM (not shown). The microcomputer includes a microcomputer having a configuration including a read-only storage device), a RAM (read / write storage device), a timer, and the like, which are connected by a signal bus (not shown). The control device 74 is provided in a control board arrangement section in the stencil printing apparatus 100.

The control device 74 turns on various UV lamps based on various signals from the operation panel 76, detection signals from the various sensors provided in the stencil printing apparatus 100, operation programs called from the ROM, and related data. Through the control circuit, UV / LED drive control circuit, solenoid drive circuit, motor drive circuit, and the like, the discharge UV lamp 26 of the discharge UV irradiation device 25 and the first plate discharge UV irradiation device 31 discharge plate. The operation panel 76 has a function of controlling the 1UV lamp 39, the second UV LED 43 for discharging the second UV irradiating device 44, the solenoid 94 for locking the locking device 90, and the compression plate lifting / lowering motor 80 as will be described later. The liquid crystal display unit also has a function of controlling.
The ROM stores in advance an operation program of essential parts of the stencil printing apparatus 100 shown in FIG. 4, necessary relation data, and the like, and this operation program is appropriately called by the CPU. For example, in the ROM, data related to each “predetermined time” for holding the UV irradiation by the second UV discharging LED 43 for a predetermined time while holding the compression state by the compression plate 38 for a predetermined time (for example, UV irradiation) As an example of the predetermined time, 60 seconds to 180 seconds (to be described later) is stored in advance.
The RAM has a function of temporarily storing calculation results of the CPU, a function of storing data signals and ON / OFF signals set and input from various keys and various sensors on the operation panel 76 as needed. Yes.
The timer has a function as time measuring means for measuring the holding time of the compression state of the compression plate 38 by driving the compression plate raising / lowering motor 80 and the UV irradiation time by the second UV LED 43 for discharging the plate.

The control device 74 has a function of performing the following various controls while calling and referring to the ROM operation program and related data.
That is, the control device 74 detects, based on the signal from the drum unit ink type identification sensor 72, whether the UV ink printing drum unit is mounted, the paper discharge UV lamp 26, the first discharge UV lamp 39, and the second discharge UV UV. When the mounting of the non-UV ink printing drum unit is detected so that the LED 43 is lit / on (lit), the discharge UV lamp 26, the first UV discharge UV 39, and the second UV discharge LED 43 are lit. First control for controlling each UV lighting control circuit and UV / LED drive control circuit of the discharge UV lamp 26, the first UV discharge UV lamp 39, and the second discharge UV UV / LED 43 so as to be turned off (light-off operation) It has a function as a control means.

  The control device 74 controls the compression plate elevating motor 80 so as to hold the compressed state for a predetermined time after the compression plate 38 compresses the used master 8a accommodated in the plate removal box 37, and the second UV for plate removal. The second master UVa for discharging the plate 43 functions as a second control means for controlling the lighting control circuit of the LED 43 so that the LED 43 irradiates the used master 8a in a compressed state with UV for a predetermined time.

The control device 74 is configured so that the lock solenoid 94 is turned on and activated to prohibit the release box 37 from being detached from the main body frame 101 during UV irradiation by the first UV discharge lamp 39 and / or the second UV discharge LED 43. It has a function as a 3rd control means which controls a solenoid drive circuit.
On the other hand, if the control device 74 determines that a jam of the used master 8a has occurred near the lower portion of the first UV irradiating device 31 based on the signal from the master detection sensor 81, the first UV for discharging the plate. It also has a function of controlling the UV lamp lighting control circuit so that the lamp 39 is extinguished, and also has a function of controlling the liquid crystal driving circuit so as to give a display warning of a discharged sheet conveyance jam to the liquid crystal display unit of the operation panel 76.

Next, the operation at the time of plate removal will be described with reference to the flowchart of FIG. First, the case where the UV ink printing drum unit is mounted on the main body frame 101 will be described.
When the user presses a plate making start key (not shown) on the operation panel 76, a start signal is generated as the plate making start key is pressed, and this is used as a trigger. When the solenoid 94 is energized / turned on, the plate release box 37 is locked to the main body frame 101 side, and removal of the plate release box 37 from the main body frame 101 is restricted / prohibited (step S1). In the case of the present embodiment, the plate discharge box 37 can be used to discard the used master 8a that is arbitrarily removed and compressed. In a state where the LED 43 is turned on, it is difficult to remove the plate discharge box 37 from the apparatus main body 101 in order to prevent the UV from each of the UV lamps 39 and 43 from coming out and hitting the user. Control is performed so that it is locked.

At the same time as the removal of the plate release box 37 is prohibited, a plate release process (plate release operation) is started. That is, in this state, the used master 8a used in the previous printing remains attached to the outer peripheral surface of the printing drum 4. In this stencil printing apparatus 100, a master tip part peeling method is adopted.
Simultaneously with the start of the plate removal process, the first UV discharge lamp 39 of the first plate discharge UV irradiation device 31 is turned on / on by a command from the CPU of the control device 74 (hereinafter simply referred to as “control device 74”). (Step S2). The printing drum 4 rotates in the direction of the arrow (clockwise) in the drawing, and the master clamper 13 that locks the tip of the used master 8a on the outer peripheral surface of the printing drum 4 approaches the plate discharging position facing the plate discharging roller 32. Then, the printing drum 4 is temporarily stopped and the master clamper 13 is opened by a clamper opening / closing device (not shown). The used master 8a, whose tip is in a free state immediately after the master clamper 13 is opened, is scooped up from the outer peripheral surface of the printing drum 4 by a plate removal roller 32 that rotates and swings to the peeling position. 1 is peeled off from the outer peripheral surface of the printing drum 4 which begins to resume rotation in the direction of the arrow in FIG. 1, and further conveyed and guided by the first discharge plate conveying roller pair 33a, 33b, the upper belt 35 and the lower belt 36, 2 is conveyed to the pair of discharged plate conveying rollers 34a and 34b. At this time, the used master 8a is transported at a predetermined speed slightly higher than the peripheral speed of the printing drum 4 that rotates slowly (steps S3 to S4).

  The discharged surface of the used master 8a while being conveyed by the first discharge plate conveying roller pair 33a, 33b, the upper belt 35, the lower belt 36 and the second discharged plate conveyance roller pair 34a, 34b is disposed on the surface 8b of the used UV ink. UV is irradiated by the first UV lamp 39. At this time, as described above, since the upper belt 35 and the lower belt 36 are not planar but linear, and thus transmit UV well, the UV ink is appropriately cured. When the master detection sensor 81 detects that the rear end in the transport direction of the used master 8a of one plate peeled from the printing drum 4 has passed through the second discharge plate transport roller pair 34a, 34b, a command from the control device 74 After the second UV for discharging plate LED 43 is turned on and turned on, the first UV lamp 39 for discharging plate is turned off (steps S5 to S7).

  When the master detection sensor 81 or the like detects that a jam of the used master 8a has occurred in the vicinity of the lower part of the first UV irradiating apparatus 31 during UV irradiation by the first UV evacuating lamp 39 In order to prevent the occurrence of a high-temperature trouble due to the UV irradiation from the first UV discharge nozzle 39, the first UV discharge lamp 39 is immediately turned off / off by a command from the control device 74. At the same time, the plate removal operation is stopped, and at the same time, a warning message indicating the occurrence of plate release jamming, a buzzer, etc. are appropriately displayed on the liquid crystal display section of the operation panel 76.

In this way, the used master 8a that has been peeled and conveyed is housed in the discharge plate box 37, and the UV from the second UV for discharging plate / LED 43 is transmitted through the mesh-shaped pressing portion 42 and applied to the used master 8a. By driving the compression plate lifting / lowering motor 80 in the normal direction, the compression plate 38 starts to move down together with the mesh pressing portion 42, and crushes and compresses the used master 8a (step S8).
Next, it is determined whether or not the compression plate 38 has reached the lowering limit. If the CPU of the control device 74 confirms the compression position of the compression plate 38 by confirming that the lowering limit of the compression plate 38, that is, the magnitude of the current flowing through the compression plate raising / lowering motor 80 described above, The lowering of the compression plate 38 is stopped at the compression position, and this state is maintained for a predetermined time. While maintaining the compression state by the compression plate 38 for a predetermined period of time, the UV irradiation from the second UV plate discharging LED 43 is simultaneously accelerated by the UV irradiation adhered to the used master 8a compressed in the discharging plate box 37 ( Step S9 to Step S10).

When a predetermined time has passed, the compression plate 38 is driven upward by, for example, driving the compression plate lifting / lowering motor 80 in reverse. Even at this time, the UV irradiation by the second UV-use LED 43 is continued. When it is confirmed by the signal from the home position sensor that the compression plate 38 has reached the home position (top dead center), the lighting of the second UV discharging LED 43 is turned off (extinguished).
The predetermined time of UV irradiation by the second UV-LED 43 for discharging plate increases the certainty of curing of the UV ink attached to the used master 8a in the discharging plate box 37 as long as possible. Since it is desired not to be a restriction when performing plate making, it is usually set to about 60 to 180 seconds. Next, when the energization of the solenoid 94 for locking of the plate release box 37 is turned off, the removal of the plate release box 37 from the main body frame 101 is permitted and preparations for receiving the next plate release are made. (Step S11 to Step S16).

On the other hand, when it is detected that the printing drum unit for non-UV ink is mounted, the discharge UV lamp 26, the first UV discharge UV lamp 39, and the second UV discharge LED 43 are controlled to be turned off / off by a command from the control device 74. Is executed, and the plate discharging operation similar to the conventional one is executed without performing the specific operations according to the above-described steps S1 to S16. During the storing operation of the used master 8a, which has been normally peeled and conveyed, into the discharging plate box 37 and during the compressing operation of the used master 8a by the compression plate 38, the energization to the locking solenoid 94 of the discharging plate box 37 is turned on. By doing so, it is preferable to perform control to prohibit the removal of the discharge box 37 from the main body frame 101.
As described above, according to the present embodiment, it goes without saying that the effects described in the effect column of the invention are exhibited.

(Second Embodiment)
5 and 6 show a second embodiment. Compared with the first embodiment shown in FIGS. 1 to 4, the second embodiment is provided with a plate discharging device 9 </ b> A as a plate discharging unit instead of the plate discharging unit 10 in which the plate discharging device 9 is arranged. The point of using the plate discharging portion 10A, the point of using the first UV irradiating device 54 for UV irradiating means and the first UV irradiating device 54 as the first UV irradiating device for discharging the plate instead of the first UV irradiating device 31 for discharging the plate and the control The main difference is that a control device 74A instead of the device 74 is used. Except for the difference, the second embodiment is almost the same as the first embodiment.

Next, the surroundings of the discharged plate portion 10A having a configuration unique to the present embodiment will be described focusing on differences from the discharged plate portion 10.
The plate discharging device 9A disposed in the plate discharging unit 10A includes a plate releasing roller 32 as a peeling conveying means for peeling and conveying the used master 8a from the outer peripheral surface of the printing drum 4, and a used master 8a peeled off by the plate releasing roller 32. A belt serving as a conveyance guiding unit that is stretched between the upper plate conveying roller 45 and the lower plate conveying roller 46 as conveying units that convey the toner toward the plate discharging box 48, and between the plate releasing roller 32 and the upper plate conveying roller 45. 47, a plate release box 48 as a plate release storage means for storing the used master 8a conveyed and guided by the plate release roller 32 and the belt 47, and the inside of the plate release box 48 is oscillated and displaced counterclockwise in FIG. As a discharged plate compression means for compressing the used master 8a stored in the discharged plate box 48 and increasing its stored amount It is mainly composed of swingable compression plate 49..

The plate removal roller 32, the upper plate conveyance roller 45, and the belt 47 are rotationally driven in the direction of the arrow in FIG. 1 by a plate drive unit (not shown) such as a plate drive motor (not shown) via a drive force transmission unit (not shown). Further, similarly to the swing contact / separation means of the plate release roller 32 in the first embodiment, the plate release roller 32 has its outer peripheral surface separated from the outer peripheral surface of the printing drum 4 via the belt 47. FIG. Are selectively occupied by a standby position indicated by a solid line and a peeling position indicated by a two-dot chain line in FIG.
In the present embodiment, an example in which the endless belt 47 is stretched between the discharged plate peeling roller 32 and the upper discharged plate conveying roller 45 is shown, but the present invention is not limited to this, and the belt 47 may be removed. The belt 47 may be made of a sheet and rubber because it is not irradiated with UV.
A master detection sensor 81 for detecting whether or not the rear end of the used master 8a that has been peeled and conveyed passes through the upper discharged plate conveying roller 45 in the vicinity of the left side of the belt 47 via the upper discharged plate conveying roller 45. It is fixed on the main body frame 101 side.

  The compression plate 49 is provided inside the plate discharging box 48, and for example, by a swing driving means similar to the swing mechanism of the compression plate (84) shown in FIG. 1 of JP-A-2005-153224. It is driven to swing around the shaft 50 in the direction of the arrow in FIG. The compression plate 49 occupies an uncompressed position (home position) located in the vicinity of the right side of the discharge box 48 when the used master 8a that has been peeled and conveyed is received, that is, as shown in FIG. The platen box is swung about 270 degrees counterclockwise by the operation of a compression plate drive motor (not shown) via a drive force transmission means provided on the main body frame 101 side and provided with a gear (not shown). It is configured to occupy a compression position for compressing the used master 8a accommodated in 48. The compression plate 49 is configured to be detachable from the main body frame 101 together with the plate release box 48, for example, as shown in FIG. 1 of JP-A-2005-153224 and described in paragraphs “0068” to “0069”. Yes.

The plate discharging box 48 has a substantially cylindrical shape, is unitized, and is configured to be detachable from the main body frame 101, that is, more specifically, configured to be detachable from the front side and the back side of the paper surface of FIG. Has been. In the discharge box 48, a locked portion as a locked member that selectively engages with a locking member (not shown) is integrally formed on the outer peripheral wall on the back side of the paper surface of the box body, and the user performs an attaching / detaching operation. A handle or the like (not shown) is also integrally formed.
The lower platen box 48 is supported and guided by a guide rail member (not shown) as an attaching / detaching means or guide means fixed to the main body frame 101, and the main body frame 101 is shown by a solid line in FIG. Between a mounting position where the plate can be stored and can be locked by being inserted into the inside, and a non-mounting position where the used master 8a which has been taken out and compressed and compressed in FIG. 5 can be discarded. It is slidable and detachable (detachable).
When the discharge box 48 is mounted in the main body frame 101, the main body of the discharge box 48 is schematically shown by a broken line in FIG. 5 and specifically shown in FIG. 3, as in the first embodiment. A locking device 90 is disposed as a locking means for preventing / restricting separation from the frame 101.

The plate removal box 48 is basically formed integrally with an appropriate resin, but its upper region is covered with a UV transparent and metal wire mesh member 51.
The used master 8a peeled and conveyed from the outer peripheral surface of the printing drum 4 rotating in the direction of the arrow in FIG. 5 is the side on which the upper surface side indicated by the arrow in FIG. Or since it becomes the adhesion surface 8b of normal non-UV ink, a large amount of UV ink or normal non-UV ink is adhered to this adhesion surface 8b. In this case, the attachment surface 8b on the upper surface side is a surface on the porous support side made of Japanese paper fibers.

  Therefore, after the UV ink printing drum unit is mounted on the main body frame 101 and UV ink is used for printing on the UV ink printing drum, it is peeled off from the printing drum 4 when a new plate making is performed. In order to UV cure the UV ink adhering to the adherent surface 8b of the used master 8a to be discharged, the adhesive surface 8b of the used master 8a is peeled and conveyed by the belt 47 and the lower discharged plate conveying roller 46. On the other hand, a first plate discharging UV irradiation device 54 including a first plate discharging UV irradiation source for irradiating UV is disposed in the plate discharging portion 10A on the main body frame 101 side. More specifically, the first UV irradiating device 54 for discharging the plate is provided in the vicinity of the upper part of the wire mesh member 51 disposed in the upper region of the plate discharging box 48. That is, the first UV irradiating device 54 for evacuating the plate is arranged so as to irradiate the UV on the UV ink adhesion surface 8b side of the used master 8a on the evacuation path between the printing drum 4 and the evacuation box 48. Has been placed.

  Since the first plate discharging UV irradiation device 54 has a small plate discharging device 9A itself, a plurality of compact UV / LEDs 52 are used as the first plate discharging UV irradiation source. . It arrange | positions like a figure so that it can light-emit and irradiate UV from UV * LED52 toward the downward direction. The upper vicinity of the plurality of UV / LED 52 arrangement portions is covered with a metal casing 53. Here, since the UV LED 52 does not reach a high temperature, the compression plate 49 may be made of resin as in the conventional case.

Next, with reference to FIG. 6, the control configuration of the main part of the stencil printing apparatus 100 will be described with a focus on differences from the first embodiment.
In FIG. 6, a control device 74A for controlling each device and each part specific to the present embodiment in the stencil printing machine 100 includes a CPU, an I / O port, a ROM, a RAM, a timer, etc., which are not shown. And a microcomputer having a configuration connected by a non-signal bus.

The control device 74A controls the UV lamp lighting based on various signals from the operation panel 76, detection signals from the various sensors provided in the stencil printing device 100, operation programs called from the ROM, and related data. Via the circuit, the UV / LED drive control circuit, the solenoid drive circuit, and the like, the discharge UV lamp 26 of the discharge UV irradiation device 25, the discharge UV / LED 52 of the first discharge UV irradiation device 54, and the lock device In addition to having a function of controlling 90 locking solenoids 94 as described later, it also has a function of controlling the liquid crystal display unit of the operation panel 76.
The ROM stores in advance an operation program of essential parts of the stencil printing apparatus 100, necessary related data, and the like, and this operation program is appropriately called by the CPU. The timer has a function as time measuring means.

The control device 74A has a function of performing the following various controls while calling and referring to the ROM operation program and related data.
That is, the control device 74A turns on / operates (activates) the discharge UV lamp 26 and the discharge UV LED 52 when the installation of the UV ink printing drum unit is detected based on the signal from the drum unit ink type identification sensor 72. Thus, when the mounting of the printing drum unit for non-UV ink is detected, the discharge UV lamp 26 and the discharge UV lamp / LED 52 are turned on / off (light-off operation). It has a function as a first control means for controlling the UV lighting control circuit and the UV / LED drive control circuit of the discharging UV / LED 52.

The control device 74A controls the solenoid drive circuit so that the lock solenoid 94 is turned on and activated to prohibit the release box 48 from being detached from the main body frame 101 during UV irradiation by the discharge UV / LED 52. It has a function as a means.
Based on the signal from the master detection sensor 81, the control device 74 </ b> A uses the used master in the vicinity of the lower part of the first plate discharging UV irradiation device 54, that is, in the vicinity of the belt 47 and the lower discharging plate conveyance path roller 46 arrangement portion. When it is determined that the transport jam of 8a has occurred, the UV / LED drive control circuit is controlled to stop the light emission drive of the UV / LED 52 for discharging the plate, and the plate is discharged to the liquid crystal display unit of the operation panel 76. It has a function of controlling the liquid crystal driving circuit so as to give a display warning of a conveyance jam.

Next, the operation at the time of plate removal in the second embodiment will be described focusing on differences from that of the first embodiment. First, the case where the UV ink printing drum unit is mounted on the main body frame 101 will be described.
When the user presses a plate making start key (not shown) on the operation panel 76, a start signal is generated as the plate making start key is pressed, and this is a trigger to start a plate discharging process (plate discharging operation). That is, in this state, the used master 8a used in the previous printing remains attached to the outer peripheral surface of the printing drum 4.
The print drum 4 rotates in the direction of the arrow (clockwise) in the figure, and a master clamper 13 (not shown in FIG. 5) that locks the tip of the used master 8 a on the outer peripheral surface of the print drum 4 is belt 47. , The printing drum 4 is temporarily stopped and the master clamper 13 is opened by a clamper opening / closing device (not shown). The used master 8a, whose tip is immediately freed immediately after the master clamper 13 is opened, is scooped up from the outer peripheral surface of the printing drum 4 by the belt 47 on the plate removal roller 32 that rotates and swings to the peeling position. At this time, the compression is released from the outer peripheral surface of the printing drum 4 which starts to resume rotation in the direction of the arrow in FIG. 1, and further occupies the home position shown in FIG. It is conveyed on the plate 49. At this time, the used master 8a is transported at a predetermined speed that is slightly higher than the peripheral speed of the printing drum 4 that rotates slowly as in the first embodiment.

When the used master 8a for one plate on the printing drum 4 is completely transported onto the compression plate 49 in the plate discharging box 48 as shown in the drawing, the first UV for discharging plate is instructed by the control device 74A. By turning on / turning on the discharge plate UV • LED 52 of the irradiation device 54, the UV ink adhesion surface 8 b of the used master 8 a is irradiated with relatively weak UV from the discharge plate UV • LED 52. In this way, the UV ink adhering to the used master 8a is allowed to react and be cured to prevent the occurrence of problems.
Immediately before the UV ejection LED 52 is turned on / on, the solenoid 94 for locking the ejection box 48 is energized / turned on by a command from the control device 74A, so that the ejection box 48 is locked to the main body frame 101 side. Removal of the discharge box 48 from the main body frame 101 is restricted / prohibited. Even in the case of this embodiment, in the state where the lighting of the plate UV-LED 52 is turned on, although the UV is relatively weak, the UV from the plate UV-LED 52 leaks to the outside and hits the user. In order to prevent this, control is performed to lock the plate discharge box 48 so that it cannot be removed from the apparatus main body 101.
Thus, for a predetermined time (the UV irradiation energy from the discharge UV / LED 52 is smaller than that of the UV lamp, a long time of UV irradiation is required. For example, it usually takes about 60 seconds to 180 seconds until the next discharge is performed. After the UV irradiation elapses, the compression plate 49 is driven to swing around the shaft 50 in the direction of the arrow in the figure by a compression plate drive motor (not shown), thereby crushing and compressing the used master 8a. At the same time, in response to a command from the control device 74A, the discharge UV / LED 52 is turned off.

In the unlikely event that the master detection sensor 81 or the like detects that a jam of the used master 8a has occurred in the vicinity of the lower part of the first discharge UV irradiation device 54 during UV irradiation by the discharge UV / LED 52. Since the discharge box 48 is taken out, the discharge UV / LED 52 is immediately turned off / off by a command from the control device 74A, and the discharge operation is stopped and the discharge box 48 is locked. When the energization of the solenoid 94 is turned off, the removal box 48 is allowed to be taken out from the main body frame 101, and at the same time, a warning message indicating occurrence of a discharge jam, a buzzer, etc. are appropriately displayed on the liquid crystal display portion of the operation panel 76. The
Next, when the energization of the solenoid 94 for locking of the plate release box 48 is turned off, the removal of the plate release box 48 from the main body frame 101 is allowed, and preparations for receiving the next plate release are made.

On the other hand, when it is detected that the non-UV ink printing drum unit is mounted, the control to turn off / off the discharge UV lamp 26 and the discharging UV / LED 52 is executed according to a command from the control device 74A. A plate removal operation similar to the conventional one is performed without performing a specific operation. Also in this embodiment, during the storing operation onto the compression plate 49 of the used master 8a that has been normally peeled and conveyed, and during the compression operation of the used master 8a by the compression plate 49, the plate discharging is performed. It is preferable to perform control for prohibiting the removal of the plate release box 48 from the main body frame 101 by turning on the energization to the locking solenoid 94 of the box 48.
As described above, according to the present embodiment, it goes without saying that the effects described in the effect column of the invention are exhibited.

(Third embodiment)
7 and 8 show a third embodiment that is different from the first and second embodiments. Compared with the first embodiment shown in FIGS. 1 to 4, the third embodiment is provided with a plate discharging device 9 </ b> B as a plate discharging means instead of the plate discharging unit 10 in which the plate discharging device 9 is arranged. A point of using the plate discharging portion 10B, instead of the first UV irradiating device 31 for evacuating a plate, a plurality of first and second UV irradiating devices 67 for evacuating a plate as ultraviolet irradiating means for evacuating and first ultraviolet irradiating means for discharging the plate. 68 is different from the control device 74 in that the control device 74B is used instead of the control device 74. Except for the difference, the second embodiment is almost the same as the first embodiment.

Next, the periphery of the plate removal unit 10B having a configuration unique to the present embodiment will be described focusing on the differences from the plate removal unit 10.
The plate discharging device 9B arranged in the plate discharging unit 10B is a used plate peeling and conveying roller 32 as a peeling and conveying means for peeling and conveying the used master 8a from the outer peripheral surface of the printing drum 4 Use that has been transported between the upper plate transport roller 45 and the lower plate transport roller 46 as a transport means for transporting the master 8a toward the cored bar 66, and is peeled and transported between the upper plate transport roller 45 and the pressing roller 58. A plurality of endless belts 61 as pressing means for pressing and winding the used master 8a against the core metal 66 and the used master 8a that has been passed between the pressing rollers 58 and 59 and pressed are pressed against the core metal 66. A plurality of endless belts 60 as pressing means for winding, an upper plate discharge conveying roller 45, and pressing rollers 58, 59 And a cored bar 66 serving as a plate take-up winding means for winding up and storing the used master 8a peeled and conveyed by the belts 60 and 61, and the used master 8a wound on the cored bar 66 or the cored bar 66 is rotated. Mainly composed of support rollers 55 and 56 as winding drive means to be driven and a plurality of endless belts 57 stretched between the support rollers 55 and 56.

  Since the belts 60 and 61 are irradiated with UV, the belts 60 and 61 are made of a UV transparent wire (wire) and are made of metal having flexibility. Each of the pressing rollers 58 and 59 is a skewered roller extending to the back side of the paper surface, and the roller shaft of the upper plate transport roller 45 according to the increase in the diameter of the used master 8a wound around the cored bar 66. It has a joint shape that is rotatably supported in the direction of the arrow in FIG. The pressing rollers 58 and 59 and the belts 60 and 61 are placed so as to press the used master 8a wound on the metal core 66 or the metal core 66 in close contact with each other by its own weight. The roller shaft 45 a of the upper plate conveying roller 45 and the shaft of the lower plate conveying roller 46 are rotatably supported by a pair of plate discharging side plates (not shown) fixed to the main body frame 101.

Driving means such as a driving motor (not shown) is connected to the roller shaft 45a of the upper discharging conveying roller 45 via a driving force transmitting means such as a gear. The driving motor drives the upper discharging conveying roller 45 and each pressing roller. 58 and 59 and the belts 60 and 61 are driven to rotate by transmitting a rotational driving force in the directions of arrows in FIG.
The cored bar 66 rotatably supported on the plurality of belts 57 or the used master 8a wound up on the cored bar 66 is wound around the support roller 55 via a driving force transmitting means such as a gear. 7 is driven to rotate in the direction of the arrow in FIG.
A master detection sensor 81 for detecting whether or not the rear end of the used master 8a that has been peeled and conveyed has passed through the upper discharged plate conveying roller 45 is located on the main body frame 101 side in the vicinity of the left side of the upper discharged plate conveying roller 45 in the drawing. It is fixed.

The used master 8a peeled and conveyed from the outer peripheral surface of the printing drum 4 rotating in the direction of the arrow in FIG. 7 is the side where the upper surface side indicated by the arrow in FIG. 7 is in contact with the outer peripheral surface of the printing drum 4, that is, UV ink Or since it becomes the adhesion surface 8b of normal non-UV ink, a large amount of UV ink or normal non-UV ink is adhered to this adhesion surface 8b. In this case, the attachment surface 8b on the upper surface side is a surface on the porous support side made of Japanese paper fibers.
Therefore, after the UV ink printing drum unit is mounted on the main body frame 101 and UV ink is used for printing on the UV ink printing drum, it is peeled off from the printing drum 4 when a new plate making is performed. In order to UV-react the UV ink adhering to the adhering surface 8b of the used master 8a to be discharged, it is pressed against the adhering surface 8b of the used master 8a which is pressed by the belt 61 and wound around the cored bar 66. The second UV irradiating device 68 having a second UV irradiating source for irradiating UV is disposed in the vicinity of the upper portion of the belt 61 and is further pressed against the belt 60 and wound around the cored bar 66. A first evacuation UV irradiation device 67 having a first evacuation UV irradiation source for irradiating UV is disposed near the upper surface of the belt 61 on the adhesion surface 8b of the finished master 8a. It is.

  The first plate ejection UV irradiation device 67 and the second plate ejection UV irradiation device 68 are fixed to the plate ejection side plate pair. The first UV irradiating device 67 is mainly composed of a first UV evacuating lamp 62 as a first evacuating UV irradiation source and a reflector 63. The second UV irradiating device 68 is mainly composed of a second UV evacuating lamp 64 as a second UV irradiating source and a reflecting plate 65. The first UV irradiating device 67 and the second UV irradiating device 68 are on the plate discharging path between the printing drum 4 and the cored bar 66 and on the UV ink adhesion surface 8b side of the used master 8a. It arrange | positions so that UV may be irradiated.

Next, with reference to FIG. 8, the control configuration of the main part of the stencil printing apparatus 100 will be described with a focus on differences from the first embodiment.
In FIG. 8, a control device 74B that controls each device and each part specific to the present embodiment in the stencil printing machine 100 includes a CPU, an I / O port, a ROM, a RAM, a timer, etc., which are not shown. And a microcomputer having a configuration connected by a non-signal bus.

The control device 74B controls the UV lamp lighting based on various signals from the operation panel 76, detection signals from the various sensors provided in the stencil printing apparatus 100, operation programs called from the ROM, and related data. The discharge UV lamp 26 of the discharge UV irradiation device 25, the first discharge UV lamp 62 of the first discharge UV irradiation device 67, and the second discharge UV irradiation device 68 through a circuit, a motor drive circuit, and the like. In addition to the function of controlling the second UV lamp 64 for discharging the plate and the take-up motor 69 as described later, it also has a function of controlling the liquid crystal display unit of the operation panel 76.
The ROM stores in advance an operation program of essential parts of the stencil printing apparatus 100, necessary related data, and the like, and this operation program is appropriately called by the CPU. The timer has a function as time measuring means.

The control device 74B has a function of performing the following various controls while calling and referring to the ROM operation program and related data.
That is, the control device 74B, based on the signal from the drum unit ink type identification sensor 72, detects the mounting of the UV ink printing drum unit 26, the discharge UV lamp 26, the first plate discharge UV lamp 62, and the second plate discharge UV. When it is detected that the non-UV ink printing drum unit is mounted so that the lamp 64 is turned on / on (lighting operation), the discharge UV lamp 26, the first UV discharge lamp 62, and the second discharge UV lamp 64 are turned on. A function as a first control means for controlling each UV lighting control circuit of the discharge UV lamp 26, the first plate discharge UV lamp 62, and the second plate discharge UV lamp 64 so as to be turned off (light-off operation). .

The control device 74B is configured so that the cored bar 66 rotates for a predetermined time even after the winding of the used master 8a due to the rotation of the cored bar 66 through the rotation driving of the winding motor 69 is completed. The winding motor 69 is controlled, and the first UV lamp 62 for discharging the plate and the second UV lamp 64 for discharging the plate are configured to irradiate the UV ink adhering surface 8b of the used master 8a on the cored bar 66 with UV for a predetermined time. It has a function as the 4th control means which controls each UV lighting control circuit.
Further, based on the signal from the master detection sensor 81, the control device 74B indicates that a jam of the used master 8a has occurred in the vicinity of the discharge plate transfer path roller 45, the lower discharge plate transfer path roller 46, and the belt 61 arrangement portion. When the determination is made, each UV lighting control circuit is controlled so that the lighting / operation of the first UV discharging lamp 62 and the second UV discharging lamp 64 is stopped, and the liquid crystal display unit of the operation panel 76 has a discharging function. It has a function of controlling the liquid crystal driving circuit so as to give a display warning of a conveyance jam.

Next, the operation at the time of discharging the plate in the third embodiment will be described focusing on differences from those of the first and second embodiments. First, the case where the UV ink printing drum unit is mounted on the main body frame 101 will be described.
After the user presses a plate making start key (not shown) on the operation panel 76, the used master 8 a on the printing drum 4 is scooped up from the outer peripheral surface of the printing drum 4 by the discharged plate peeling roller 32 and peeled off from the outer peripheral surface of the printing drum 4. Up to this point, the operation is the same as that of the second embodiment, and the description thereof is omitted. The used master 8a peeled off from the outer peripheral surface of the printing drum 4 is further conveyed toward the cored bar 66 arranged on the left side in FIG. 7 by the upper discharged plate conveying roller 45 and the lower discharged plate conveying roller 46.

Next, the winding motor 69 is rotationally driven simultaneously with the drive motor, whereby the pressing rollers 58 and 59 and the belts 61 and 60 are rotated in the direction of the arrows in FIG. 56 and belt 57 are rotated in the direction of the arrow in FIG. At this time, the used master 8a (thermoplastic resin film side) peeled and conveyed by the pressing force due to the weight of each pressing roller 58, 59 and each belt 61, 60 is the outer peripheral surface (core metal 66) of the core metal 66. And the used master 8a wound around the cored bar 66 (on the UV ink adhesion surface 8b side).
Simultaneously with or slightly before the rotation of the drive motor and take-up motor 69, the first UV lamp 62 for discharging and the second UV lamp 64 for discharging are turned on / on by a command from the control device 74B. As a result, each UV from the first UV discharge lamp 62 and the second UV discharge UV lamp 64 is irradiated to the UV ink adhesion surface 8b of the used master 8a guided and conveyed by the belts 61 and 60.

Thereby, the UV ink attached to the outer peripheral surface of the cored bar 66 or the attached surface 8b of the used master 8a wound around the cored bar 66 starts to be reactively cured. At this time, the winding / conveying speed of the used master 8a is conveyed at a predetermined speed that is slightly higher than the peripheral speed of the printing drum 4 that rotates slowly as in the first embodiment.
Even after the used master 8a for one plate on the printing drum 4 has been completely wound around the outer periphery of the core metal 66, the first UV lamp 62 for discharging and the second UV lamp 64 for discharging are turned on for a predetermined time, while the core is turned on. Control is performed in which the gold 66 is rotated slowly and UV is applied to the adhesion surface 8b of the used master 8a to cure the UV ink.

  During the UV irradiation by the first plate discharge UV lamp 62 and the second plate discharge UV lamp 64, it is detected by the master detection sensor 81 or the like that a jam of the used master 8a has occurred in the vicinity of the upper plate transfer roller 45. In such a case, in order to prevent a trouble due to high temperature, control is performed to immediately turn off / turn off the first UV discharge plate 62 and the second UV discharge plate 64 in accordance with a command from the control device 74B. Then, the plate removal operation is stopped, and at the same time, a warning message indicating the occurrence of a plate release jam, a buzzer, etc. are appropriately displayed on the liquid crystal display unit of the operation panel 76.

On the other hand, when mounting of the non-UV ink printing drum unit is detected, control to turn on / off the discharge UV lamp 26, the first UV discharge lamp 62, and the second discharge UV lamp 64 in accordance with a command from the control device 74B. Is executed, and the plate discharging operation similar to the conventional one is executed without performing the above-described specific operation.
As described above, according to the present embodiment, it goes without saying that the effects described in the effect column of the invention are exhibited.

In the first to third embodiments, the following problems of the conventional apparatus can be solved and a new stencil printing apparatus can be provided. That is, for example, the stencil printing apparatus described in Japanese Utility Model Publication No. 4-35188 only discloses a stencil printing apparatus dedicated to UV ink that can use only UV ink. A stencil printing device for UV ink was required.
The printing apparatus described in Japanese Patent Application Laid-Open No. 5-64878 has been described that printing is possible even with normal ink, but it is necessary to remove the paper conveying means, and its operation and work are very troublesome.
Needless to say, according to the first to third embodiments, the problems described above can be solved and the effects described in the effect column of the invention can be achieved (see claim 2).

  The master peeling method for peeling / conveying the used master 8a on the printing drum 4 is described in the first to third embodiments, for example, in Japanese Patent Laid-Open Nos. 5-309933 and 5-286223. Like the disclosed one, the master tip part peeling method was started by releasing the master clamper arranged on the printing drum (plate cylinder) and starting to peel off the used master from the master tip part. Not limited to this, for example, after the used master wound around the outer peripheral surface of the printing drum (plate cylinder) as disclosed in Japanese Utility Model Publication No. 2-274, Japanese Patent Laid-Open No. 63-74679, etc. It is also possible to adopt a master rear end peeling method in which a displaceable discharge roller is brought into contact with the end and peeling of the used master from the master rear end is started.

In view of the above-described problems of the present invention, the present invention is directed to a plate discharging apparatus that includes a plate discharging ultraviolet irradiation means for irradiating ultraviolet light onto the surface of a used master (plate) that has been peeled off from a printing drum. In a broad sense, ultraviolet light is applied to the surface of the used master (plate) that has been peeled off from the printing drum and to which the ultraviolet curable ink is attached. It may have ultraviolet irradiating means for discharging the plate.
As an example of this, ultraviolet light is applied to the surface of the used master UV curable ink peeled off between the printing drum and the peeling and conveying means via an ultraviolet reflector (reflecting means) or the like. In addition, there may be mentioned one in which the ultraviolet irradiation means for discharging the plate is arranged at a position away from the arrangement portion of the plate discharging apparatus (plate discharging means).

  As described above, the present invention has been described with respect to specific embodiments including examples, but the technical scope disclosed by the present invention is not limited to those exemplified in the above-described embodiments. These may be combined as appropriate, and the operability can be further improved by such a combination. Thus, it will be apparent to those skilled in the art that various embodiments, modifications, and examples can be configured within the scope of the present invention in accordance with the necessity and application.

  The present invention is not limited to the stencil printing apparatus described above, and for example, has a configuration in which ink is supplied from the outside of a printing drum as disclosed in JP-A-7-17013 (Patent No. 2790963), that is, The present invention can also be applied to or applied mutatis mutandis to a printing apparatus configured to supply ink to a master on a printing drum and form a printed image on a sheet S, that is, an intaglio printing apparatus. In other words, while supplying non-UV ink or UV ink to a printing plate including a master or the like wound around the printing drum, the sheet S is directly or indirectly (for example, via a transfer cylinder) on the printing plate on the printing drum. It can also be applied or applied mutatis mutandis to a printing apparatus that performs printing by pressing the

1 is a schematic front view of a stencil printing apparatus showing a first embodiment of the present invention. It is a block diagram which shows the control structure of the principal part of the stencil printing apparatus of FIG. It is a partial cross section front view which shows the locking device of the stencil box in the stencil printing apparatus of FIG. 2 is a flowchart showing a sequence operation around a stencil part of the stencil printing apparatus of FIG. 1. It is a partial cross section front view around the plate discharging part of the stencil printing apparatus showing the second embodiment of the present invention. It is a block diagram which shows the control structure of the principal part of the stencil printing apparatus of FIG. FIG. 6 is a front view around a stencil part of a stencil printing apparatus showing a third embodiment of the present invention. It is a block diagram which shows the control structure of the principal part of the stencil printing apparatus of FIG.

Explanation of symbols

1 Stencil printing machine (printing machine)
2 Feeder 3 Feeder 4a Plate cylinder 4 Printing drum 5 Press roller (pressing means)
6 Stencil Printing Department (Printing Department)
7 Discharge unit 8 Master (Example of plate or printing plate)
8a Used master (used version)
8b UV curable ink adhering surface in the used master 9, 9A, 9B Plate removal device (plate removal means)
10, 10A, 10B Discharge plate 25 UV irradiation device for paper discharge (ultraviolet irradiation means for printing medium)
26 Discharge UV lamp (UV irradiation source for printing medium, UV irradiation means for printing medium)
31, 67 1st UV irradiating device for discharging plate (UV irradiating means for discharging plate / 1st UV irradiating device for discharging plate)
32 Exfoliation peeling roller (peeling conveyance means)
33a, 33b first conveying roller pair (discharge plate conveying means)
34a, 34b Second conveying roller pair (discharge plate conveying means)
37, 48 Discharge box (Discard storage means)
38, 49 Compression plate (Discard compression means)
39, 62 First UV lamp for discharging plate (first ultraviolet irradiation source for discharging plate, first ultraviolet irradiation means for discharging plate)
64 Second UV lamp for discharging plate (first ultraviolet irradiation source for discharging plate, first ultraviolet irradiation means for discharging plate)
42 Reticulated pressing part (reticulated part)
43 Second UV LED for discharging plate (second ultraviolet irradiation source for discharging plate, second ultraviolet irradiation means for discharging plate)
44 Second UV irradiating device for discharging plate (ultraviolet irradiating means for discharging plate, second ultraviolet irradiating means for discharging plate)
45 Upper Plate Transfer Roller (Discard Plate Transfer Unit)
46 Lower plate conveying roller (emitted plate conveying means)
52 UV / LED for plate removal (first ultraviolet irradiation source for plate removal, first ultraviolet irradiation means for plate removal)
54 1st UV irradiating device for evacuating plate (ultraviolet irradiating means for evacuating plate, 1st ultraviolet irradiating means for discharging plate)
66 Metal core (Discard winding means)
67 1st UV irradiating device for evacuating plate (UV irradiating means for evacuating plate, 1st UV irradiating means for evacuating plate)
68 Second UV irradiating device for plate discharging (UV irradiating means for discharging plate / first UV irradiating means for discharging plate)
69 Winding motor (winding drive means)
72 Drum unit ink type identification sensor (ink type detection means)
74, 74A, 74B Control device (first to fourth control means)
76 Operation panel 80 Compression plate elevating motor 90 Locking device (locking means)
94 Solenoid for lock (lock drive means)
100 Stencil printing machine (printing machine)
101 Body frame (printer body)
S paper (an example of printing media and sheet-like recording media)
X Paper transport direction

Claims (10)

In a printing apparatus comprising a plate discharging means for peeling off and storing a used plate on a printing drum and capable of printing using an ultraviolet curable ink,
A printing apparatus comprising: an ultraviolet irradiating means for discharging a plate to irradiate ultraviolet light onto an adhesion surface of a used plate peeled from the printing drum on a surface of the used plate. UV irradiation means for a printing medium for irradiating ultraviolet rays onto a printed printing medium;
Attaching and removing the UV curable ink printing drum with UV curable ink and the non-UV curable ink printing drum with non-UV curable ink selectively attached to and detached from the printer body Means,
The printing drum attached to the printing apparatus main body through the attaching / detaching means is either the ultraviolet curable ink printing drum or the non-ultraviolet curable ink printing drum, or the ink attached to the printing drum. Ink type detection means for detecting whether the ultraviolet curable ink or the non-ultraviolet curable ink;
When the ultraviolet ray curable ink is detected by the ink type detecting means or when the ultraviolet curable ink is detected, the ultraviolet ray irradiating means for the printing medium and the ultraviolet irradiating means for discharging the plate are operated, A first control means for disabling the ultraviolet irradiation means for the printing medium and the ultraviolet irradiation means for discharging the printing medium when the curable ink printing drum is mounted or the non-ultraviolet curable ink is detected;
The printing apparatus according to claim 1, further comprising: The plate removal means has a peeling conveyance means for peeling and transporting a used plate from the printing drum, and a waste plate storage means for storing a used plate that has been conveyed by the peeling conveyance means,
The UV irradiating means for discharging the plate is disposed on the discharging path between the peeling and conveying means and the discharging plate storing means so as to irradiate the UV curable ink adhering surface side of the used plate with ultraviolet rays. The printing apparatus according to claim 1, wherein the printing apparatus is a first discharging ultraviolet irradiation unit. The plate consists of a thermoplastic resin film and a porous support,
4. The printing apparatus according to claim 3, wherein the ultraviolet irradiating means for discharging the first plate is arranged so as to irradiate the used plate with ultraviolet rays on the surface of the porous support. The plate removal means has a plate release storage means for storing a used plate peeled from the printing drum,
The UV irradiating means for discharging the plate is a second UV irradiating means for discharging the plate disposed in the vicinity of the discharged plate storing means so as to irradiate ultraviolet rays toward the used plate stored in the discharged plate storing means. The printing apparatus according to claim 1, wherein: The plate removal means has a plate release storage means for storing a used plate peeled from the printing drum, and a plate release compression means for compressing a used plate stored in the plate release storage means,
The UV irradiating means for discharging the plate is a second UV irradiating means for discharging the plate disposed in the discharged plate compressing means so as to irradiate the used plate stored in the discharged plate storing means with ultraviolet rays. The printing apparatus according to any one of claims 1 to 4. The discharged plate compression means is configured to be displaceable between a compressed position where the used plate stored in the discharged plate storage means contacts and compresses the used plate, and an uncompressed position spaced from the compressed position. ,
The discharged plate compression means has a net-like portion that is ultraviolet transparent when it occupies the compression position and compresses in contact with a used plate stored in the discharged plate storage means,
The printing apparatus according to claim 6, wherein second irradiating ultraviolet irradiating means is disposed in the mesh portion.   After the used plate compression means compresses the used plate stored in the discharged plate storage means, the compressed state is maintained for a predetermined time, and the second ultraviolet irradiation means for discharging the plate is used as the compressed state. The printing apparatus according to claim 6, further comprising a second control unit that irradiates the used plate with ultraviolet rays for a predetermined time. The plate discharging means has a plate discharging storage means that stores the peeled used plate and is detachable from the printing apparatus main body,
The printing apparatus main body is provided with a locking means for restricting detachment of the discharged plate storage means from the printing apparatus main body,
During the ultraviolet irradiation by at least one of the plate irradiating ultraviolet irradiating means, the first evacuating ultraviolet irradiating means, and the second evacuating ultraviolet irradiating means, the locking means is used to disengage from the printing apparatus main body. The printing apparatus according to claim 1, further comprising a third control unit that prohibits detachment of the discharged plate storage unit. The plate removal means includes a plate removal winding means for winding and storing the peeled used plate, and a winding drive means for rotating the plate removal winding means,
Even after the used plate is being wound by the discharged plate winding means, the winding drive means is controlled so that the discharged plate winding means rotates for a predetermined time, and the discharged plate winding is performed. 2. A fourth control means for controlling the ultraviolet ray irradiating means for discharging the plate for a predetermined time to irradiate the surface of the used plate with the ultraviolet curable ink adhering thereto. The printing apparatus as described.

Images