JP2002001921A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a printer to inform or recognize a point where a printing sheet carrier error including printer sheet jam or curling of a printing sheet at a plate cylinder often occurs, then to immediately recognize information on a part which causes a printing sheet carrier error. SOLUTION: When the number of occurrences per each point of the printing sheet carrier error or the curling of a printing sheet at a each plate cylinder 1a, 1b during the prescribed operation time of a stenciling apparatus 500 is larger than the number set beforehand, a controller 100 controls a liquid crystal display 95 in an operation panel 90 so as to display and inform the points of the occurrences based on each signal from a counter 105 and a timer 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus including a stencil printing apparatus and the like. The present invention relates to a printing device that performs printing.

[0002]

2. Description of the Related Art As a simpler printing method than before, there has been known a thermosensitive digital stencil printing apparatus as an example of a printing apparatus. In this stencil printing machine, the master is brought into contact with the fine heating elements of the thermal head, and the master is conveyed while energizing the heating elements of the thermal head in a pulsed manner. The master that has been prepressed (hereinafter referred to as “preprinted master”) is wound around the outer peripheral surface of a porous cylindrical plate cylinder, and ink is supplied from ink supply means inside the plate cylinder, and the printing that is fed By continuously pressing the paper against the plate cylinder through the master that has been made by pressing means such as a press roller, the ink oozes out from the hole in the plate cylinder and from the perforated part of the master, and the ink is printed. A print image is formed by transferring the image to paper.

In recent years, Japanese Patent Application Laid-Open No.
As disclosed in JP-A-34467, JP-A-11-151852, JP-A-11-208085, and the like, a plurality of plate cylinders are arranged in a printing paper transport direction (hereinafter, referred to as a "paper transport direction"). Attempts have been made to supply inks of different colors to the masters wound around each plate cylinder to continuously perform multicolor printing on printing paper. In performing such multicolor printing, prevention of a so-called double image is an important theme. The doubling image means that the undried and unset ink on the printing paper printed on the upstream plate cylinder (hereinafter referred to as “upstream plate cylinder”) is printed on the downstream plate cylinder (hereinafter “downstream plate cylinder”). A phenomenon in which the attached ink adheres to the master on the upper part of the printing paper, and the attached ink is retransferred with a slight shift when printing on the same part of the printing paper to be conveyed next. Also called offset ghost or simply ghost. In order to prevent such double images and obtain a desired print image quality, the printing paper printed by the upstream plate cylinder in the paper transport direction is transported with high positional accuracy to the master on the downstream plate cylinder. It becomes important.

Therefore, for example, in a stencil printing apparatus described in Japanese Patent Application Laid-Open No. 11-34467, a suction conveyance device (also referred to as an intermediate conveyance means) disposed between an upstream plate cylinder and a downstream plate cylinder is provided. The following advantages are obtained by providing an intermediate blowing means provided with a blowing source and a blowing member. That is, by providing the above-mentioned intermediate air blowing means, via the air guiding member,
Since the airflow generated by the air supply source is efficiently guided and blown to the paper transport path formed between the upstream plate cylinder and the downstream plate cylinder, the separation performance of the printing paper in the upstream plate cylinder is improved. At the same time, the printing paper is pressed against the suction conveyance device to improve the conveyance performance, and if the printing paper is blown to the leading edge of the printing paper when the paper enters the downstream printing cylinder, the paper enters the downstream printing cylinder. The performance is improved, and generation of double images can be reduced. Therefore, in order to surely separate and separate the printed paper from the plate cylinder, or to increase the accuracy of the transport position of the printed paper, for example, the intermediate blowing means as described above or the Japanese Patent Application Laid-Open 11-15185
The arrangement of the apparatus has been complicated by providing the blower fan 34 and the like disclosed in FIG.

On the other hand, in the double-cylinder printing apparatus described in Japanese Patent Application Laid-Open No. 11-151852, the presence or absence of the winding of the printing paper between the upstream plate cylinder and the downstream plate cylinder is determined by an intermediate transfer device (intermediate transfer means). And a print paper curl detection sensor (print paper curl detection means).
Then, by using the above-described print paper roll-up detection sensor or the like, it is checked whether or not the paper transport is being performed in a timely manner in accordance with the necessary printing timing on the upstream plate cylinder or the downstream plate cylinder. If they do not match, a paper transport error including a paper transport jam or a paper roll up on the plate cylinder has occurred. Here, "paper curling" means that the printing paper is stuck to the master or the like on the plate cylinder due to the adhesive force of the ink, and is used with an air knife, a separation claw, the above-described intermediate blowing means, or a combination thereof. It means a paper error (paper ejection error) phenomenon that cannot be peeled or separated.

[0006]

However, although a paper conveyance jam can be detected by the print paper curl detection sensor, it is difficult to determine where a paper conveyance error or paper curl occurs at each plate cylinder. However, it is not clear why the paper conveyance jam occurs or how often the paper jam occurs, and it is difficult to find out the location and cause of the jam even if it is repaired after the jam is cleared. Also, it is not possible to notify the serviceman of the location where the jam has occurred or to properly arrange or replace unstable parts or failure parts related to the occurrence of jams that frequently stop working (operation). In some cases, the machine stopped for a while.

Accordingly, the present invention has been made in view of the above circumstances, and is capable of notifying or knowing a place where a sheet conveyance error including a sheet conveyance jam or a sheet winding up on a plate cylinder frequently occurs. Accordingly, it is an object of the present invention to provide a printing apparatus which allows the user to immediately know the component information that causes a paper error and easily arrange or replace components when repairing.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems and to achieve the above-mentioned object, the invention described in each claim has the following characteristic structure. Claim 1
The described invention has a plurality of plate cylinders arranged in the paper transport direction, and in a printing apparatus that supplies ink to a master on each plate cylinder and prints on printing paper, a paper transport error or the above-described each plate cylinder causes A plurality of paper error detecting means for detecting the presence or absence of occurrence of paper winding, and a paper transport error detected by each of the plurality of paper error detecting means or a paper winding error at each plate cylinder. A sheet error counting unit that is provided correspondingly and counts the number of occurrences of the sheet conveyance error or the sheet winding in each of the plate cylinders for each occurrence position,
A timer for measuring the operating time of the printing apparatus; a notifying means capable of notifying the occurrence location; a predetermined operating time based on each signal from each of the paper error counting means and the clocking means; Control means for controlling the notifying means so as to notify the occurrence position when the number of occurrences of the paper conveyance error or the paper curling for each occurrence position occurring in the number is greater than a preset number of times. And characterized in that:

According to a second aspect of the present invention, there is provided the printing apparatus according to the first aspect, wherein the occurrence of the paper transport error or the roll-up of the paper in each of the plate cylinders, which is notified by the notification means, is in the vicinity of the occurrence. The information is characterized by including the component information provided in the.

[0010] The third aspect of the present invention is the first or second aspect.
In the printing apparatus described above, between the upstream plate cylinder disposed on the upstream side in the paper transport direction and the downstream plate cylinder disposed on the downstream side adjacent to the upstream plate cylinder, An intermediate conveying unit for conveying the printing paper printed by the upstream plate cylinder to the downstream plate cylinder, the paper error detecting unit includes:
The paper error detecting means is provided in the intermediate conveyance means, and the paper error detecting means detects the paper winding at the upstream plate cylinder side, and the paper winding due to the printing paper not being separated from the upstream plate cylinder. Alternatively, it is characterized in that it is detected whether or not the paper has rolled up due to no pressing by the pressing means which is relatively free to contact and separate from the upstream plate cylinder.

The invention described in claim 4 is the first or second invention.
In the printing apparatus described above, between the upstream plate cylinder disposed on the upstream side in the paper transport direction and the downstream plate cylinder disposed on the downstream side adjacent to the upstream plate cylinder, An intermediate conveying unit for conveying the printing paper printed by the upstream plate cylinder to the downstream plate cylinder, the paper error detecting unit includes:
The sheet error detecting means is disposed in the intermediate conveying means, and the sheet error detecting means detects the sheet conveying error on the upstream plate cylinder side, and causes the sheet conveying due to the print sheet remaining on the intermediate conveying means. It is characterized in that it is detected whether or not the paper transport error has occurred due to an error or a pressure not being applied to the downstream plate cylinder by a pressing means which is relatively free to contact and separate.

[0012] The invention according to claim 5 is the invention according to claim 1 or 2.
In the printing apparatus described above, downstream of a most downstream plate cylinder disposed on the most downstream side in the paper transport direction, a discharge transport unit for discharging printing paper printed by the most downstream plate cylinder Wherein the sheet error detecting means is provided in the sheet discharging and conveying means, and the sheet error detecting means detects the sheet winding at the most downstream plate cylinder side at the most downstream position. Detecting whether the paper has rolled up due to the printing paper not being separated from the plate cylinder or whether the paper has rolled up due to not being pressed by the pressing means capable of relatively approaching and separating from the most downstream plate cylinder. It is characterized by.

The invention according to claim 6 is the first or second invention.
In the printing apparatus described above, downstream of a most downstream plate cylinder disposed on the most downstream side in the paper transport direction, a discharge transport unit for discharging printing paper printed by the most downstream plate cylinder Wherein the sheet error detecting means is provided in the sheet discharging and conveying means, and the sheet error detecting means detects the sheet discharging and conveying at the timing of detecting the sheet conveying error on the most downstream plate cylinder side. It is characterized in that it is detected whether or not the paper transport error has occurred due to the print paper remaining on the means.

[0014] The invention according to claim 7 is the invention according to claims 1 to 6.
In the printing apparatus according to any one of the above, the control unit controls the notifying unit so as to notify the occurrence location, and then resets only the sheet error counting unit corresponding to the occurrence location. Features.

According to an eighth aspect of the present invention, in a printing apparatus for supplying ink to a master on a plate cylinder and printing on printing paper, it is detected whether a paper conveyance error or a paper curl has occurred on the plate cylinder. A sheet error detecting means for detecting a sheet conveyance error detected by the sheet error detecting means or a position at which the sheet rolls up on the plate cylinder. Paper error counting means for counting the number of occurrences of paper winding for each occurrence location, time counting means for counting the operating time of the printing apparatus, notification means capable of notifying the occurrence location, and Based on each signal from the counting means and the time counting means, the number of occurrences of the paper transport error or the paper winding for each occurrence location within the predetermined operation time is determined in advance. When more than the constant has been set times, and having a control means for controlling the informing means so as to notify the occurrence location.

According to a ninth aspect of the present invention, in the printing apparatus according to the eighth aspect, the occurrence location notified by the notification means includes component information arranged near the occurrence location. I do.

According to a tenth aspect of the present invention, there is provided the printing apparatus according to the eighth or ninth aspect, further comprising, at the downstream side of the plate cylinder in the sheet conveying direction, a sheet discharging and conveying means for discharging the printed printing sheet. Wherein the paper error detecting means is provided in the paper discharging and conveying means, and the paper error detecting means does not separate the printing paper from the plate cylinder at a timing at which the paper roll is detected at the plate cylinder. It is characterized in that the presence or absence of the occurrence of the paper curl due to the fact that the paper curl or the press by the pressing means which is relatively free to contact and separate from the plate cylinder is not applied is detected.

According to an eleventh aspect of the present invention, there is provided the printing apparatus according to the eighth or ninth aspect, further comprising a discharge conveying means for discharging the printed printing paper downstream of the plate cylinder in the paper conveying direction. The paper error detecting means is provided in the paper discharge conveying means, and the paper error detecting means prints the printing paper on the paper discharging conveying means at the timing of detecting the paper transport error in the plate cylinder. It is characterized in that the presence or absence of the above-mentioned paper conveyance error due to the presence of the remaining is detected.

According to a twelfth aspect of the present invention, in the printing apparatus according to any one of the eighth to eleventh aspects, the control means controls the notifying means so as to notify the occurrence location, and then controls the notifying means. It is characterized in that only the paper error counting means corresponding to the occurrence location is reset.

According to a thirteenth aspect of the present invention, there is provided a printing apparatus having a plurality of plate cylinders arranged in a sheet conveying direction and supplying ink to a master on each plate cylinder to perform printing on a printing sheet. A plurality of sheet error detecting means for detecting whether or not a sheet is rolled up in each of the plate cylinders; and a sheet transport error detected by each of the plurality of sheet error detecting means or a sheet in each of the plate cylinders A sheet error counting unit that is provided corresponding to the position where the winding occurs and counts the number of occurrences of the sheet conveyance error or the sheet winding in each plate cylinder for each occurrence position, and the operation time of the printing apparatus. Based on each signal from the above-mentioned paper error counting means and the above-mentioned clocking means, based on each signal from the above-mentioned paper error counting means and the above-mentioned clocking means, the above-mentioned paper transport error or the above-mentioned paper winding-up at each occurrence location occurring within the predetermined operation time. And having a storage means for storing the raw count.

According to a fourteenth aspect of the present invention, in a printing apparatus which supplies ink to a master on a plate cylinder and prints on printing paper, it detects whether a paper conveyance error or a paper curling has occurred in the plate cylinder. A sheet error detecting means for detecting a sheet conveyance error detected by the sheet error detecting means or a position at which the sheet rolls up on the plate cylinder. Paper error counting means for counting the number of occurrences of paper winding for each occurrence location, time counting means for counting the operation time of the printing apparatus, based on each signal from the sheet error counting means and the time counting means, Storage means for storing the number of occurrences of the paper transport error or the paper curling for each of the occurrence locations occurring within the predetermined operation time.

As a specific example of the paper error detecting means in claim 1 and the like, a light reflection type as shown in FIG. An optical sensor (a paper leading edge sensor, a registration sensor, an intermediate curling detection sensor, or a paper discharging curling detection sensor) is preferably used. In addition, when there is room in cost and installation space, a light transmission type optical sensor may be used in order to further improve the reliability of the detection operation.

As a specific example of the sheet error counting means in claim 1 or the like, a counter (counter) as shown in FIG. 1 described in an embodiment to be described later is preferably used. As the counter (counter), for example, a JK flip-flop circuit used in digital control is used.
The counter is a backup power supply (for example, a battery)
However, the configuration may be such that the count value is sequentially stored and held in a RAM having a backup power supply (for example, a battery) as shown in FIG. .

As a specific example of the time measuring means in claim 1 or the like, a timer provided with a backup power supply (for example, a battery) as shown in FIG.

As a specific example of the notification means in claim 1 or the like, a liquid crystal display (liquid crystal display) as shown in FIG. 1 described in an embodiment to be described later is preferably used. In addition, the occurrence location may be lit or blinked by an LED (Light Emitting Diode) to notify the user, or a combination of the above-described units and a buzzer may be used to notify the user.

As a specific example of the control means in claim 1 or the like, a microcomputer or a microprocessor as shown in FIG. 1 described in an embodiment of the invention described later is preferably used. There may be.

Specific examples of the pressing means in the third to seventh and tenth aspects are an impression cylinder provided with a holding means for holding a leading end of a printing paper, a press roller described in an embodiment to be described later, and a plate. It is also possible to use a well-known device that performs printing by moving the cylinder to the impression cylinder side (including the type in which the ink roller inside the plate cylinder projects to the impression cylinder side).

In the printing apparatus according to the first to fourteenth aspects of the present invention, for example, as described in JP-A-7-17013, ink is supplied from outside the plate cylinder to a master on the plate cylinder to perform printing. A printing device for forming an image on printing paper, wherein the printing device is a double-cylinder printing device having a plurality of plate cylinders or a single-cylinder printing device having a single plate cylinder And so on.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention including embodiments with reference to the drawings (hereinafter, simply referred to as "embodiments").
Will be described. Throughout each embodiment and the like, for components such as members and components having the same function and shape,
The description is omitted as much as possible by attaching the same reference numerals. For simplicity of the drawings and the description, even if they are components to be shown in the drawings, components that do not need to be specifically described in the drawings will be omitted as appropriate. In the drawings, components that are configured as a pair and do not need to be specifically distinguished and described will be replaced with the description by appropriately describing one of them in order to simplify the description. (First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 7, reference numeral 500 denotes a double-cylinder stencil printing apparatus as an example of a printing apparatus to which the present invention is applied. Reference numeral 501 denotes a main body frame as the main body of the stencil printing apparatus 500.
The main body frame 501 is arranged in a substantially housing shape. As shown in FIG. 7, the stencil printing apparatus 500 is arranged side by side from the upstream side to the downstream side in the paper transport direction X, which is the direction in which the print paper 22 is transported, and is detachably attached to the main body frame 501. Two first plate cylinders 1a (hereinafter simply referred to as “plate cylinder 1a”) and a second plate cylinder 1b
(Hereinafter simply referred to as “plate cylinder 1b”). Plate cylinder 1a
Is an upstream plate cylinder 1 disposed on the upstream side in the sheet transport direction X.
a (hereinafter simply referred to as “plate cylinder 1 a”), and the plate cylinder 1 b is a downstream plate cylinder 1 b (hereinafter simply referred to as “plate cylinder 1 a”) disposed downstream of the sheet conveyance direction X adjacent to the plate cylinder 1 a. "Print cylinder 1
b ").

In the stencil printing machine 500, the adjacent plate cylinders 1
a and 1b are provided with an initial phase difference in advance, and each of the plate cylinders 1a and 1b can be attached to and detached from the main body frame 501 when occupying the predetermined phase.
3b is wound around each plate cylinder 1a, 1b, and each plate cylinder 1a, 1b
Ink is supplied to the upper masters 33a and 33b, and each plate cylinder 1 is supplied with ink.
The printing is continuously performed by pressing the printing paper 22 against the masters 33a and 33b on a and 1b, thereby enabling simultaneous multicolor printing (simultaneous two-color printing in the first embodiment). It is configured as follows. In the first embodiment, for simplicity of description, two plate cylinders 1a and 1b arranged in the sheet conveying direction X will be described, but of course, three or more plate cylinders are arranged in the sheet conveying direction X. To perform multi-color (color) printing.

As shown in FIG. 7, each plate cylinder 1a, 1b has
Each home position and each plate cylinder 1a, 1b can be stopped at a position where it can be attached and detached. Each plate cylinder 1a,
The home position 1b is different from the position where the plate cylinders 1a and 1b can be attached and detached because the plate cylinders 1a and 1b occupy a predetermined phase.
This is set at the initial position of each of the plate cylinders 1a and 1b that position the plate cylinders a and 5b upward without being positioned substantially directly below. In FIG. 7, the state where the plate cylinder 1a occupies the home position is indicated by H.
-It is indicated as P.

First, referring to FIG.
After describing the overall configuration of the present invention, detailed configurations of an operation panel, a control device, and the like according to the gist configuration of the present invention will be described. The plate cylinder 1a and the plate cylinder 1b have substantially the same function and configuration, respectively. Similarly, the ink supply means and the like described below provided on the inner and outer circumferences of the plate cylinder 1a and the ink supply means and the like described later provided on the inner and outer circumferences of the plate cylinder 1b have substantially the same functions and functions. Since they have a configuration, they are distinguished by adding a symbol a or b to the end of the same code, and when one of them is described in detail, the other description is omitted to avoid redundant description.

As shown in FIG. 7, the stencil printing apparatus 500 includes a sheet feeder for feeding printing paper 22 loaded on a sheet feed tray 21 disposed at the lower right of the plate cylinder 1a, as shown in FIG. The apparatus 20 and a printing master 22a on the plate cylinder 1a which are fed with the printing paper 22 arranged and fed below the plate cylinder 1a.
A printing pressure device 32a that performs printing by pressing against
An air knife 7a that separates and separates the printed printing paper 22 printed by the printing pressure device 32a from the plate cylinder 1a, and a printing paper 22 that is disposed below and fed below the plate cylinder 1b and is placed on the plate cylinder 1b. A printing pressure device 32b that performs printing by pressing against a master 33b that has undergone plate making, and a printed printing paper 22 that is disposed between the printing pressure devices 32a and 32b and printed by the printing pressure device 32a. An intermediate conveying device 17 for conveying to the device 32b, an intermediate blowing means 50 disposed above the intermediate conveying device 17, and a printing paper 22 printed by the printing pressure device 32b. The air knife 7b to be separated and the printed printing paper 22 arranged at the lower left of the plate cylinder 1b and subjected to multicolor printing by the printing pressure device 32a and the printing pressure device 32b are discharged onto a discharge tray 37.
A sheet discharging and conveying device 35 as a sheet discharging and conveying unit for discharging a sheet, and a sheet discharging and blowing unit 59 disposed above the air knife 7b.
And a paper leading edge sensor 48, a registration sensor 49, an intermediate winding detection sensor 74, and a paper discharging winding detection sensor 75, which are arranged in this order on the paper conveyance path from the upstream side to the downstream side in the paper conveyance direction X. Have.

Paper edge sensor 48, registration sensor 4
9. The intermediate curl detection sensor 74 and the paper discharge curl detection sensor 75 are provided with a plurality of paper mistakes for detecting whether or not paper curl has occurred on the paper convey path or whether paper curl has occurred on each of the plate cylinders 1a and 1b. It has a function / configuration as a detecting means. Each of these sensors 48, 49, 7
Details of 4, 75 will be described later.

The stencil printing apparatus 500 is provided with each of the plate cylinders 1a and 1b.
Japanese Patent Application Laid-Open No. 11-208085 (Japanese Patent Application No. 10-1), which does not have a plate making device and a plate discharging device around it, and does not have a document reading device above each plate cylinder 1a, 1b.
67322) shown in FIG. 4. That is, the stencil printing apparatus 500 is a stencil printing apparatus integrated with a thermosensitive digital stencil printing machine provided with a document reading device, a stencil discharging device, and a stencil making device (both not shown). 1a, 1b
Constitute detachable drum units (not shown), and each of the plate cylinders 1a, 1a,
1b, the used masters 33a, 33b are discharged, or the masters 33a, 33b that have been made are removed from the plate cylinders 1a, 1b.
b is wound around the outer peripheral surface. The stencil printing apparatus 500 uses the same drum unit and components that constitute the above-described thermosensitive digital stencil making type integrated stencil printing apparatus, and is designed to be a common part between the series models. The device configuration is simple and small, and the cost is reduced.

Examples of the above-mentioned drum units and attaching / detaching means (not shown) for detachably attaching these drum units include, for example, Japanese Unexamined Patent Application Publication No.
FIG. 3 of Japanese Patent Publication No.
The same configuration as that disclosed in FIG.

The plate cylinder 1a has a well-known porous cylindrical shape.
It is rotatably supported around the drum shaft 2a via an end plate (not shown). The plate cylinder 1a is provided so as to extend in the central axis direction of the drum shaft 2a.
A metal supporting cylinder (not shown) having a large number of fine openings (not shown) for printing ink similar to that shown in FIG. 4 of JP-A-38961. ,
It has a two-layer structure with a resin or metal mesh screen layer (not shown) wound around the outer peripheral surface. The support cylinder has a printable area in which the opening is formed over a predetermined range on the circumference excluding the periphery of the clamper 5a, and a printing ink impermeability in which the opening is not formed. A non-print area is formed. The non-printing area is also provided on both side edges of the support cylinder. Both end edges of the plate cylinder 1a are mounted and fixed on the outer peripheral surfaces of the end plates provided at both ends of the plate cylinder 1a.

As shown in FIG. 7, an openable and closable clamper 5a for clamping the leading end of the master 33a is provided on one bus line of the outer peripheral portion of the plate cylinder 1a. The clamper 5a
It is pivotally mounted on the plate cylinder 1a by a clamper shaft 6a. In addition,
In the thermosensitive digital stencil making type stencil printing apparatus, the stencil printing machine is opened and closed at a predetermined position by opening and closing means (not shown) provided at an appropriate position around the outer circumference of the plate cylinder 1a.

Inside the plate cylinder 1a, as shown in FIG.
An ink supply means for supplying ink from the inner peripheral surface to the outer peripheral surface of the plate cylinder 1a is provided. In the ink supply means of the plate cylinder 1a, for example, black (Bk) color (hereinafter, referred to as "black") ink is used as the first color ink. In the ink supply means of the plate cylinder 1b, magenta (M) is used as the second color ink. Color (hereinafter "red"
(In other words) are supplied respectively. The ink supply means in the plate cylinder 1a includes the plate cylinder 1
Ink roller 3a for supplying black ink to the inner peripheral surface of a
A doctor roller 4a which is arranged in parallel with the ink roller 3a with a slight gap therebetween and forms an ink reservoir Ia with the ink roller 3a, and an ink supply which also serves as a drum shaft 2a for supplying ink to the ink reservoir Ia. A tube 2a is arranged.

The ink is pumped by an ink pump (not shown) from an ink container (not shown) provided in a drum unit (not shown) configured to make the plate cylinder 1a detachable from the main body frame 501. , Drum shaft 2
a through the ink supply pipe 2a also serving as a
a. The amount of ink supplied to the ink reservoir Ia is determined by an ink sensor or an ink detection circuit as an ink detection means (see, for example, FIG. 2 of Japanese Patent Laid-Open No. 5-229243).
The ink is fed and detected by the above-mentioned ink pump, and the ink pumping amount is controlled by the ink pump. The ink roller 3a is
It is formed of metal such as aluminum or stainless steel, rubber, or the like, and rotates clockwise with the plate cylinder 1a by a gear train (not shown). The ratio of the rotation speeds of the ink roller 3a and the plate cylinder 1a is set to a predetermined value. The doctor roller 4a is formed of a metal such as iron or stainless steel,
It rotates counterclockwise by a gear train (not shown). The rotation speed ratio between the doctor roller 4a and the plate cylinder 1a is also set to a predetermined value.

As the master 33a, a master obtained by bonding a Japanese paper or the like as a porous support (base) to a thermoplastic resin film such as polyester is used. The master 33a is not limited to the one described above, and may be a very thin master made of only a thermoplastic resin film or a master made of substantially only a thermoplastic resin film (having a thickness of about 1 mm).
Although the thickness is not as large as about 8 μm, the master is thinner (20 to 30 μm in thickness) than the above-mentioned conventional master 33a (about 40 to 50 μm in thickness) and has a high mixing ratio of synthetic fibers in the base. For example, it is also possible to use a synthetic fiber base master having a base made of 100% polyethylene terephthalate (PET) having an extremely high mixing ratio of synthetic fibers.

Each plate cylinder 1a, 1b and each printing pressure device 32
a, 32b, for example, the above-mentioned JP-A-11-1
The same configuration as the configuration of the press roller displacement driving means 150 disclosed in FIG. This press roller displacement driving means is disclosed in
As disclosed in FIG. 2 and the like of Japanese Patent No. 51852, a printing pressure position for rotating the plate cylinder 1a and the plate cylinder 1b and pressing the press rollers 9a and 9b against the outer peripheral surfaces of the plate cylinders 1a and 1b. And a non-printing position separated from the printing pressure position, and has a function and configuration for swinging and displacing in synchronization with the rotation of each of the plate cylinders 1a and 1b.

FIG. 4 schematically shows the press roller displacement driving means in a simplified manner. In FIG. 4, reference numeral 80 denotes a plate cylinder driving unit included in the press roller displacement driving unit. As shown in FIG. 4, the plate cylinder driving means 80 includes a main motor 81 as a single drive source for rotating each of the plate cylinders 1a and 1b, and a plate cylinder of each of the drum units mounted in the main body frame 501. And a rotation transmitting means for transmitting the rotational driving force by the main motor 81 for driving the first and the first motors 1a and 1b in a rotatable state. The main motor 81 is composed of a DC motor, and this DC motor is provided with a known braking means.

The rotation transmitting means is attached to a main body rear side plate (not shown) fixed to the rear main body frame 501, and corresponds to the drive pulley 82 fixed to the output shaft of the main motor 81 and the plate cylinder 1a. The first pulley 84 is rotatably supported by the rear plate of the main body, and the drive pulley 82 is connected to the first pulley 84 via a plurality of tension pulleys (not shown).
A timing belt 83 stretched between a plate cylinder pulley 84, a second plate cylinder pulley 85 rotatably supported by the main body rear side plate corresponding to the plate cylinder 1b, and a first plate cylinder pulley 8
4 and a timing belt 86 stretched between the second plate cylinder pulley 85. The rotation ratio between the first plate cylinder pulley 84 and the second plate cylinder pulley 85 is set to 1: 1. As a result, the plate cylinders 1a and 1b rotate synchronously.
The main motor 81 is connected to a CPU 101 constituting a control device 100 shown in FIG.
It is connected to the.

In the first embodiment, the plate cylinder driving means 8
Although the illustration of the up-down moving means is omitted in order to clarify the features of the configuration of FIG.
13 and 16 of Japanese Patent No. 38961 may be provided with a second vertical movement means 245 similar to that shown in FIGS.

2 and 4, each plate cylinder 1a, 1
body frame 5 facing an end plate (not shown) on the back side of b
At a predetermined position 01, home position sensors 70a and 70b for detecting the home position when the plate cylinders 1a and 1b occupy the home position are provided respectively. Home position sensors 70, 70
b is a light-transmitting optical sensor having a light-emitting element and a light-receiving element similar to those shown in FIG. 7 of JP-A-11-151852, for example. Each plate cylinder 1a, 1
b, a light shielding plate 71a, which selectively engages with the home position sensors 70a, 70b,
71b is provided to protrude outward. With the above configuration, the stencil printing apparatus 500 does not require a detecting unit for exclusively detecting the stencil feeding position and the stencil discharging position. In FIG. 4,
Each home position sensor 7 is used to simplify the drawing.
The mounting positions of 0, 70b are deliberately shifted in the outer centrifugal direction of the plate cylinders 1a, 1b.

An incremental type optical rotary encoder 72 (hereinafter abbreviated as "encoder 72") having a large number of slits is attached to the end plate on the back side of the plate cylinder 1a so as to protrude outward. An encoder 7 is provided on the rear frame (not shown) of the drum unit on the plate cylinder 1a side.
An encoder sensor 73 for detecting a rotation amount (rotation angle) and a rotation speed (peripheral speed) of the plate cylinder 1a with the outer peripheral portion of the plate cylinder 2 interposed therebetween is attached. The encoder sensor 73 is a light transmission type optical sensor. In the first embodiment, since the home position sensors 70a and 70b are provided, the encoder sensor 73 may not be an essential control component. This is because the CPU 101 of the control device 100, which will be described later, shown in FIGS. This is because the rotational positions of the plate cylinders 1a and 1b can be obtained by calculation.

The sheet feeding device 20 includes an elevator type sheet feeding tray 21 that can be moved up and down, a call roller 23 and a separation roller 24 rotatably supported by a sheet feeding side plate (not shown).
And a separation pad 26 pressed against the separation roller 24 to prevent double feeding of the printing paper 22, and a predetermined timing in which the leading end of the printing paper 22 is directed between the outer peripheral surface of the plate cylinder 1a and the press roller 9a. Pair of upper and lower registration rollers 2
9, 30 and a pair of registration rollers 2
A pair of upper and lower guide plates 28, a lower guide plate 27, and a pair of upper and lower resist guide plates 31, 31 for guiding between the nip portions of 9, 9 and the outer peripheral surface of the plate cylinder 1a and the outer peripheral surface of the press roller 9a; A paper feed motor 44 for rotating the call roller 23 and the separation roller 24, which is provided independently of the main motor, and an independent of the main motor for rotating the registration roller pairs 29, 30. A registration motor 47, a paper leading edge sensor 48 that is disposed in a paper transport path between the separation roller 24 and the registration roller pair 29, 30 and detects the leading edge of the printing paper 22, and a plate cylinder 1a. A registration sensor 49 is provided in the sheet transport path between the registration roller pairs 29 and 30 and detects the leading end of the printing paper 22.

The paper feed tray 21 has printing paper 22 thereon.
And is supported by the paper feeder body so as to be able to move up and down. The paper feed tray 21 is moved up and down by a motor device (not shown) in conjunction with the increase and decrease of the printing paper 22. The call roller 23 and the separation roller 24 are provided so as to come into contact with the uppermost printing paper 22 on the paper feed tray 21, and the separation roller 24 and the separation pad 26 are cooperated by the call roller 23. Printing paper 2 sent out
It has the function of separating 2 into one. The paper feeding unit that separates the printing paper 22 one by one and feeds the leading end of the printing paper 22 toward the pair of registration rollers 29 and 30 includes the above-described call roller 23, also called a pickup roller, the separation roller 24, and the like. It is composed of a separation pad 26.

The paper feed motor 44 is composed of a stepping motor, and has a function as paper feed drive means for rotating the separation roller 24 and the call roller 23. Paper feed motor 44
Is a toothed endless belt stretched between a drive pulley (not shown) provided on the output shaft of the paper feed motor 44 and a paper feed pulley (not shown) provided on the shaft of the separation roller 24. It is connected to the separation roller 24 via a belt (not shown). Thus, the separation roller 24 is rotated clockwise by the rotation of the sheet feeding motor 44. A one-way clutch (not shown) is incorporated in each shaft of the separation roller 24 and the call roller 23. The separation roller 24 and the call roller 23 are connected to a feed pulley provided on the shaft of the separation roller 24 and a call roller. It rotates only in the clockwise direction via a toothed endless belt (not shown) stretched between a roller and a paper feed pulley provided on the shaft of the roller 23.

The pair of registration rollers 29 and 30 once contact the leading end of the printing paper 22 conveyed by the paper feeding means with a portion immediately before the nip portion of the pair of registration rollers 29 and 30 to form the shape of the guide plate 28. After the upper curved portion of the printing paper 22 is formed at the leading end of the printing paper 22, the leading end of the printing paper 22 is gripped and conveyed between the outer peripheral surface of the plate cylinder 1a and the press roller 9a in a timely manner. I do.
The registration motor 47 is composed of a stepping motor,
It has a function as registration driving means for rotating the lower registration roller 30. The registration motor 47 is provided with a toothed belt extending between a driving pulley (not shown) provided on the output shaft of the registration motor 47 and a registration pulley (not shown) provided on the shaft of the registration roller 30. It is connected to a registration roller 30 via an endless belt (not shown).

The paper leading edge sensor 48 and the registration sensor 49 are light reflection type optical sensors having a light emitting element and a light receiving element. The upper guide plate 28 and the resist guide plate 31 have openings (not shown) through which light emitted from the light emitting elements and light reflected from the front end surface of the printing paper 22 pass. Paper edge sensor 48
Has a jam detecting function of detecting the leading end of the printing paper 22 to detect a jam of the printing paper 22 generated on the upstream side in the paper conveying direction X including the above-described paper feeding means. It also has a part of the function of adjusting the amount of deflection when the tip of the printing paper 22 is abutted against the portion immediately before the nip portion 30 to form a curved deflection.

The registration sensor 49 detects the leading end of the printing paper 22 to detect the registration roller pair 29, 30.
In addition to having a jam detection function of detecting a jam of the printing paper 22 generated on the upstream side in the paper feeding direction X including
Registration roller pairs 29 and 30 that change according to the two types
Is transmitted to a control device (not shown) for detecting the leading end of the printing paper 22 for correcting the slip amount of the printing paper 22 at the time.

The printing pressure device 32a includes an ink roller 3a, a press roller 9a, a press roller bracket 11a, a press roller tension 13a, and a press roller cam 12a.
a.

The press roller 9a presses the fed printing paper 22 against the plate cylinder 1a to print a print image on the printing paper 2
2 has a function as a pressing means. The press roller 9a is rotatably supported at one swing end of the press roller bracket 11a, and is provided on the outer peripheral surface of the plate cylinder 1a so as to be able to freely contact and separate. The printing pressure of the press roller 9a on the plate cylinder 1a is
It is applied by a press roller tension 13a (tensile spring) stretched on the other swing end side of 1a. Due to the urging force of the press roller tension 13a, the other swinging end of the press roller bracket 11a is pressed against the outer peripheral surface of the substantially pear-shaped press roller cam 12a. The press roller cam 12a is connected to the main motor of the press roller displacement drive unit, and is rotated in synchronization with the timing of feeding the printing paper 22 from the paper feed device 20 and the rotation of the plate cylinder 1a. It has become. When the printing paper 22 is not fed from the paper feeding device 20, the large diameter portion of the press roller cam 12a is opposed to and pressed against the other swinging end of the press roller bracket 11a. The press roller cam 12a rotates when the printing paper 22 is fed from the paper feeding device 20, and makes its small diameter portion face the other swinging end of the press roller bracket 11a. It swings around. At this time, the printing pressure by the press roller tension 13a is applied to the outer peripheral surface of the plate cylinder 1a.

The tip of the air knife 7a is a nozzle in order to prevent the printing paper 22 from sticking to the outer peripheral surface of the plate cylinder 1a and winding up. Air knife 7
A compressed air flow is discharged from the pump of the air pressure generating device (not shown) at high speed in synchronization with the conveyance of the leading end of the printing paper 22 to the nozzle a, and is blown to the leading end of the printing paper 22. The air knife 7a is arranged near the outer peripheral surface of the plate cylinder 1a around the air knife shaft 8a.
2 can be pivoted between a separation position where the leading end portion is peeled and separated from the outer periphery of the plate cylinder 1a and a non-separation position separated from the separation position. That is, the air knife 7a swings in synchronization with the rotation of the plate cylinder 1a so that the clamper 5a and the tip of the air knife 7a do not interfere with each other.

The intermediate conveying device 17 mainly includes a porous conveying belt 16 stretched between the driven roller 14 and the driving roller 15, an intermediate suction fan 18, and a casing 19. Since at least the surface of the transport belt 16 employs a material such as urethane rubber having a high coefficient of friction with the printing paper 22, a force for pulling the printing paper 22 to the left in FIG. 7 is generated. However, since the upstream side in the sheet conveying direction X is still pressed by the nip portion (printing portion) between the plate cylinder 1a and the press roller 9a, the traveling speed of the printing paper 22 in the left direction is equal to that of the plate cylinder 1a. It is set to be the same as the rotational peripheral speed.

The transport belt 16 is driven synchronously with the plate cylinder 1a at a transport speed equal to or slightly higher than the peripheral speed of the plate cylinder 1a.
Will be conveyed with tension applied to the left in FIG. The intermediate suction fan 18 includes a casing 19
And a negative pressure state is created in the casing 19 by an intermediate suction fan motor that rotates the same.

The intermediate blowing means 50 includes an intermediate blowing fan 51 as a blowing source for generating an air flow (blowing), and an intermediate blowing motor 52 for driving the intermediate blowing fan 51 to rotate.
And the air blow from the intermediate blower fan 51 is transmitted to the plate cylinder 1a and the plate cylinder 1
b and a paper transport path (transport belt 16)
And a wind guide path forming section 53 that forms a flow path for blowing air to the air passage.

The paper transport path is between a printing position Ea formed by a nip between the plate cylinder 1a and the press roller 9a and a printing position Eb formed by a nip between the plate cylinder 1b and the press roller 9b. The transport surface is mainly configured by the transport belt 16 disposed in the first position. The intermediate blower fan 51 is
By being rotationally driven by the intermediate blower motor 52, a strong airflow is generated toward the intermediate transfer device 17. The intermediate blower motor 52 is electrically connected to a control device (not shown) via a motor drive circuit (not shown). When a print start key 92 of the operation panel 90 shown in FIG. When input to the above-mentioned control device, it operates (activates) using it as a start signal.

The air guide path forming section 53 is, for example, shown in FIGS. 1 and 4 to 6 of Japanese Patent Application Laid-Open No.
54) to (0056).
8 is similar to that of FIG. The description of the air guide member 48 is omitted to avoid redundant description.

The paper discharge blower 59 includes a paper discharge fan 60 as a blower for generating an air flow (air blow), and a paper discharge motor 61 for driving the paper discharge fan 60 to rotate.
And a wind guide path forming unit 62 that forms a flow path and the like for blowing air from the paper discharge fan 60 between the outer peripheral surface of the plate cylinder 1b and the printed paper 22 attached to the plate cylinder 1a. It is mainly composed of The discharge air blower motor 61 is electrically connected to a control device (not shown) via a motor drive circuit (not shown), and a print start key 92 of the operation panel 90 shown in FIG. Is input to the above-described control device, the device is operated (operated) using the input as an activation signal. For this reason, the paper discharge blowing means 5
Numeral 9 assists the air knife 7b in separating and separating the sheet 22 in order to prevent the printed sheet 22 from winding around the plate cylinder 1b.

The paper discharging and conveying device 35 is mainly composed of a porous conveying belt 40 stretched between a driven roller 39 and a driving roller 38, a paper discharging suction fan 36, a casing 41 and the like. I have.

The transport belt 40 is driven synchronously with the plate cylinder 1b at a transport speed substantially equal to the peripheral speed of the plate cylinder 1b. The discharge suction fan 36 is disposed in the casing 41, and creates a negative pressure state in the casing 41 by a discharge suction fan motor that rotates the discharge suction fan 36. Further, the air flow (blast) sent by the rotation of the paper discharge fan 60 constituting the above-described paper discharge blowing means 59 is the same as the air flow discharged from the air knife 7b, and the air knife 7b. Is sprayed from the upper left to the surface of the printed printing paper 22. The latter air blowing from the paper discharge fan 60 is also for the purpose of preventing the printed printing paper 22 from rising from the conveyor belt 40 and promoting the drying of the ink of the printed image.

In FIG. 7, near the downstream side of the drum unit 1a of the drum unit mounted in the main body frame 501 in the sheet conveying direction X, whether or not the printing paper 22 has rolled up and whether or not a paper conveyance error has occurred. Is provided with an intermediate winding detection sensor 74 as a paper error detection means for detecting the error. In the vicinity of the downstream side of the drum cylinder 1b of the drum unit mounted in the main body frame 501 in the paper transport direction X, a paper error for detecting whether the print paper 22 has rolled up and whether the paper transport error has occurred is detected. A paper ejection winding detection sensor 75 as a detection unit is provided. Each winding detection sensor 7
Reference numerals 4 and 75 each include a reflection type optical sensor similar to the print paper roll-up detection sensor 50 shown in FIG. 6 of JP-A-11-151852. The intermediate winding detection sensor 74 is disposed and fixed below the opening between the plurality of divided transport belts 16 in the intermediate transport device 17. On the other hand, the paper ejection winding detection sensor 75 is provided with a plurality of divided conveyance belts 40 in the paper ejection conveyance device 35.
It is arranged and fixed below the opening between them.

Here, referring to FIG. 6, a technical matter in which the printing distance between adjacent plate cylinders is made shorter than the outer peripheral length of the plate cylinder to provide an initial phase difference between the adjacent plate cylinders. Will be described. In FIG. 6, reference symbol A indicates the outer peripheral length of each of the plate cylinders 1a and 1b, and reference symbol L indicates the inter-print distance between the plate cylinder 1a and the plate cylinder 1b. Further, a rectangular black mark on the printing paper 22 indicates a first color image, and a rectangular white mark indicates a second color image. The printing paper 22 is conveyed by the clockwise rotation of the plate cylinder 1a while being pressed by a nip formed when the plate cylinder 1a and the press roller 9a are pressed, and the intermediate conveying device 17 rotates the peripheral speed of the plate cylinder 1a. Is transported to the plate cylinder 1b at the same transport speed as Under such sheet transport conditions, each reference position of the image on the printing paper 22 must be set to be the same position between the plate cylinder 1a and the plate cylinder 1b. The phase is
That is, it must be delayed by the printing distance L from the plate cylinder 1a.

The stencil printing apparatus 500 of the first embodiment
Then, in order to make the device compact, L ≠ A, and
L <A, the distance between plate cylinders L = 240 mm, and the outer peripheral length A
= 180π (565) mm, the phase difference between the plate cylinder 1a and the plate cylinder 1b is shifted by about 153 degrees when compared at the positions of the clampers 5a and 5b, as schematically shown in FIG.

The embodiment of the present invention has a relation of L ≠ A and L <A in order to make the apparatus compact, and is not limited to the one having two plate cylinders 1a and 1b. It goes without saying that the present invention can also be applied to a double-cylinder printing apparatus having three or more plate cylinders and corresponding to each of the plate cylinders having the above relationship.

Next, referring to FIG.
The detailed configuration of the operation panel 90 for operating 0 will be described. On the operation panel 90, various keys for operating the stencil printing apparatus 500 and giving predetermined instructions, various indicators and display devices for displaying the operation state, operation state, warning and the like of the stencil printing apparatus 500 are provided. Is arranged. As shown in FIG. 3, a numeric keypad 93 for setting the number of prints and the like is provided on the operation panel 90.
A print start key 92 for starting a printing operation for a predetermined number of prints set and set in step 3, and a stop key 94 for stopping each operation of paper feeding, printing, and paper discharging.
And so on.

Further, on the operation panel 90, a sheet conveyance error detected by each of the sheet leading edge sensor 48, the registration sensor 49, the intermediate curling detecting sensor 74, and the paper discharging curling detecting sensor 75, or the plate cylinders 1a and 1b. A liquid crystal display unit 95 having a function and configuration as a notifying unit capable of displaying and notifying a location where paper roll-up or the like has occurred, and displaying and notifying component information arranged near the location where the paper has rolled up. Is arranged. The liquid crystal display unit 95 displays, in addition to the above functions, messages such as operation status, warnings, and the like, set modes and functions, and displays operation contents for selecting and setting the functions as needed. It also has the function of doing.

The liquid crystal display section 95 is composed of a liquid crystal display device, and is driven and controlled by a control device 100 described later via a liquid crystal driving circuit. The liquid crystal display unit 95 displays a pictorial display unit 95a that displays a location where a paper transport error or a roll of paper has occurred on each of the plate cylinders 1a and 1b in a picture, and component information arranged near the above-mentioned location. It mainly comprises a character display section 95b.

Next, a control configuration of a main part of the first embodiment will be described with reference to FIG. As shown in FIG. 1, the control device 100 includes a CPU (Central Processing Unit) 10 connected to each other by, for example, a signal bus (not shown).
1. RA with backup power supply and capable of holding data
A microcomputer provided with an M (read / write storage device) 102, a ROM (read only storage device) 103, a timer 104 having a backup power supply, a counter 105, and an I / O (input / output) port (not shown). I have it. The control device 100 is provided at a position shown in FIG. It should be noted that the control configuration shown in FIG. 1 shows only main control components for simplification of description and simplification of the drawing.

Paper edge sensor 48, registration sensor 4
9. On / off signals and data signals from various keys on the home position sensors 70a and 70b, the encoder sensor 73, the intermediate curl detection sensor 74, the paper discharge curl detection sensor 75, and the operation panel 90 are transmitted to the control device 10.
0 is transmitted to the CPU 101. CP of control device 100
From U101, a command signal described later is transmitted to the liquid crystal display unit 95 of the operation panel 90. The CPU 101 of the control device 100 transmits and receives an on / off signal, a data signal, and a command signal to and from the main motor 81 via a motor controller 87 not shown in FIG.

The counter 105 includes a sheet leading edge sensor 48, a registration sensor 49, and a plurality of sheet error detecting means.
A sheet conveyance error or each plate cylinder 1 detected for each of the intermediate winding detection sensor 74 and the discharged paper winding detection sensor 75
A plurality is provided corresponding to the location where the paper curling occurs at a and 1b. The counter 105 functions as sheet error counting means for counting the number of occurrences of sheet conveyance errors or sheet windings in the plate cylinders 1a and 1b for each occurrence location.
Having a configuration. The counter 105 (counter) is composed of, for example, a JK flip-flop circuit used in digital control, and is configured to be resettable. Paper transport error counted by the counter 105 or each plate cylinder 1
The number of occurrences of paper winding in a and 1b is stored and saved in the RAM as needed.

The timer 104 has a function and configuration as a time measuring means for measuring the operation time of the stencil printing apparatus 500. The timer 104 adds and counts the operation and operating time for each operation from ON to OFF of a power switch (not shown) which is provided in the stencil printing apparatus 500 and supplies and supplies power to each unit. This is used to calculate the rate of occurrence of sheet transport error or sheet winding in each of the plate cylinders 1a and 1b (number of occurrences / operating time of the stencil printing apparatus 500). The value of the timer 104 may be variably set by, for example, a so-called serviceman program that can be set by a combination of the key operations on the operation panel 90.

If it is desired to obtain a more accurate operation time of the stencil printing apparatus 500, that is, a printing operation time during which the printing operation is substantially performed, the timer 104 measures the driving time of the main motor 81. Is also good. Further, the operation time of the stencil printing apparatus 500 is more accurate, that is, around the components arranged in the vicinity of the above-mentioned occurrence location (for example, the registration roller pair 29, 30 and the registration motor 23, the separation roller 24, the paper feed motor 44, etc.). 47, the air knives 7a, 7b, the main motor 81, etc., the intermediate blower fan 51, the intermediate blower motor 52, etc., the components of the printing pressure device 32a, the intermediate suction fan 18, the intermediate suction motor driving this, etc. The driving time of each component of the printing pressure device 32b, such as the fan 60 and the discharge air blower motor 61, the discharge suction fan 36, and the discharge suction motor that drives the discharge suction fan 36, may be measured. The time measuring means is the timer 104
Not limited to this, the backup power supply may be removed from the timer 104, and the operation / operating time for each operation transmitted from the timer from which the backup power supply has been removed may be added and stored in the RAM 102 side.

The CPU 101 of the control device 100 (hereinafter sometimes simply referred to as “control device 100”) generates a signal generated within a predetermined operation time of the stencil printing device 500 based on signals from the counter 105 and the timer 104. A function as a control means for controlling the liquid crystal display unit 95 so as to display and inform the occurrence location when the number of occurrences of paper transport error or paper curl at each occurrence location is greater than a preset number of times. Having. The preset number of times of sheet conveyance error or sheet winding is set to, for example, five, and the set value of the timer 104 is, for example, one.
The description will be made as 00 hours. That is, the control device 100
Indicates the occurrence rate of a sheet conveyance error or sheet winding in each of the plate cylinders 1a and 1b, that is, when the number of occurrences per 100 hours of the stencil printing apparatus 500 is six or more, the occurrence location is displayed. The following description is based on the assumption that the liquid crystal display unit 95 is controlled.

In addition to the above functions, the control device 100 has a function of resetting only the counter 105 corresponding to the above-mentioned occurrence location after controlling the liquid crystal display unit 95 so as to display and notify the above-mentioned occurrence location.

The control device 100 calculates the absolute rotation angle from the home position (machine origin) based on the signals from the home position sensors 70a and 70b and the encoder sensor 73 in addition to the above functions. The rotational position of each plate cylinder 1a, 1b can be obtained.

The ROM 103 stores in advance data for controlling the driving of the main motor 81 and the liquid crystal display unit 95 and a program for performing the operation described later. More specifically, the occurrence frequency data (5 times) and the operation time data (100 hours) of the stencil printing apparatus 500 described above, and the items described in (1) to (5) described later, that is, the sheet leading edge sensor 48 and the registration The timing of the detection operation of the sensor 49, the timing of the detection operation of each of the winding detection sensors 74 and 75, and the relation data between the cause system and the occurrence location determined based on the result of the detection operation are stored in advance.

The RAM 102 temporarily stores data signals and the like from the keys, sensors, and the like. Also, RA
M102 has a function as storage holding means for storing and holding the number of times of sheet conveyance errors counted by the plurality of counters 105 or the number of times of sheet winding in each of the plate cylinders 1a and 1b even after the power switch is turned off. . The storage holding means is not limited to the RAM 102 having a backup power supply and capable of performing a storage holding operation, but may be a flash memory or the like having similar functions, that is, a nonvolatile memory.

Next, the operation of the stencil printing apparatus 500 will be described. The plate cylinders 1a, 1 on which the used masters 33a, 33b are discharged, and on which the masters 33a, 33b which have been used are wound.
b each of the drum units provided with
The paper feeding and printing processes are started from the initial state shown in FIG. At this time, the plate cylinder 1a
At the home position, the clamper 5a is located slightly near the upper right, and the plate cylinder 1b is rotated and stopped until the clamper 5b is positioned slightly near the upper left. As described above, in the first embodiment, when each of the plate cylinders 1a and 1b is in the main body frame 501, an initial phase difference is previously provided between the plate cylinder 1a and the plate cylinder 1b as described above. .

First, when a user such as an operator (hereinafter, referred to as “user”) turns on the power switch, the operation panel 90 appropriately displays the contents relating to the initial setting state. Next, when the user presses the print start key 92, the printing process starts. The paper feed tray 21 is raised until the uppermost printing paper 22 stacked on the paper feed tray 21 contacts the call roller 23. The topmost printing paper 22 that is in contact with the call roller 23 is conveyed by rotating the call roller 23 together with the separation roller 24 by activating the paper feed motor 44, and
By the cooperative action of the separation roller 24 and the separation pad 26, 1
The sheet is separated into sheets, and is fed in the sheet conveying direction X toward the pair of registration rollers 29 and 30 while being guided by a pair of upper and lower guide plates 28 and a lower guide plate 27. At this time, the leading end of the conveyed printing paper 22 is aligned with the pair of registration rollers 29 and 3.
It is in contact with the portion immediately before the nip portion of No. 0 and stops in a state where it is bent along the guide plate 28.

On the other hand, when the printing operation is started, the first color plate cylinder 1a starts rotating at the printing rotation speed. On the inner peripheral side of the plate cylinder 1a, an ink supply distributor (not shown)
Supplies black ink to an ink reservoir Ia formed between the ink roller 3a and the doctor roller 4a, and the black ink is kneaded and extended by the rotation of the ink roller 3a and the doctor roller 4a, and the ink roller is rotated. 3a is uniformly attached to the outer peripheral surface.
The remaining amount of the ink is detected by the above-mentioned ink detecting means, and when the amount of the ink becomes low, the ink is supplied from the ink supply distributor. In this manner, the ink roller 3a that rolls on the inner peripheral surface while rotating in the same direction as the rotation direction of the plate cylinder 1a and in synchronization with the rotation speed of the plate cylinder 1a.
As a result, ink is supplied to the inner peripheral side of the plate cylinder 1a.

Then, the registration motor 47 is activated to feed the leading end of the printing paper 22 in synchronization with the rotational position of the plate-making image of the plate-making master 33a on the plate cylinder 1a. 30 is driven to rotate so that the leading end of the printing paper 22 becomes the plate cylinder 1a.
The timing of the rotation of the plate-making image of the master 33a on which the plate has been made is adjusted in timing, in other words, at a predetermined timing in accordance with the rotation of the plate cylinder 1a, the plate cylinder 1 in the printing pressure device 32a.
a, the leading edge of the printing paper 22 is fed to the printing position Ea, in synchronism therewith, the press roller 9 which is separated below the outer peripheral surface of the plate cylinder 1a.
As a swings and rises, a is pressed against the stencil master 33a wound around the outer peripheral surface of the plate cylinder 1a. As a result, the master 33a, which has undergone plate-making, is brought into close contact with the outer peripheral surface of the plate cylinder 1a by the adhesive force due to the viscosity of the ink oozing out from the opening (not shown) of the plate cylinder 1a. The ink exudes from the perforation pattern portion 33a, and the exuded ink
2 to form a first black printed image.

The printing paper 22 on which a black print image is formed
When the tip reaches the vicinity of the tip of the air knife 7a, the air knife 7a rotates around the air knife shaft 8a in synchronization with the rotation of the plate cylinder 1a and approaches the outer peripheral surface of the plate cylinder 1a. The leading end of the printing paper 22 is separated and separated from the plate cylinder 1a by the compressed air flow blown from the leading end of the air knife 7a and the air blown from the intermediate blowing fan 51 of the intermediate blowing means 50. The printing paper 22 separated and separated by the air knife 7a and the intermediate blowing means 50 is further transported to the downstream side in the paper transport direction X by the intermediate transport device 17.

The provision of the intermediate blower means 50 allows the sheet conveying path formed between the plate cylinder 1a and the plate cylinder 1b to move through the operation of the air guide path forming section 62 having a wind guide member (not shown). Since the air flow generated by the intermediate blowing fan 51 is efficiently guided and blown, the printing paper 22 on the plate cylinder 1a is
Is improved, and the printing paper 22 is pressed against the conveying belt 16 of the intermediate conveying device 17 to improve the conveying performance. Further, when air is blown to the leading end of the printing paper 22 when the printing paper 22 enters the plate cylinder 1b, the performance of the printing paper 22 entering the plate cylinder 1b can be improved, and generation of double images can be reduced. it can.

The details of the peeling / separating operation of the printing paper 22 including the intermediate blowing means 50 are described in, for example, JP-A-11-3446.
No. 7, paragraphs (0062) to (006)
6), and the same as the supplementary explanation of the first embodiment described in paragraphs (0067) to (0070) of the same specification can be applied. And a detailed description thereof will be omitted.

As described above, the conveyor belt 16 rotates in the direction of the arrow in FIG. Is conveyed toward the next printing position Eb by the rotation of the conveyor belt 16 in the counterclockwise direction.

The transport speed of the transport belt 16 (linear rotational speed)
Is, as described above, the circumferential velocity (rotational linear velocity) of the plate cylinder 1a.
However, since the upstream side of the printing paper 22 is still pressed by the nip portion between the plate cylinder 1a and the press roller 9a, the traveling speed of the printing paper 22 in the left direction is set to the plate cylinder 1a. Is the same as the peripheral speed. Therefore, the printing paper 22 is conveyed with tension applied to the left. Strictly, since the transport speed of the transport belt 16 is faster than the traveling speed of the printing paper 22, the transport belt 16 and the printing paper 22 have slipped.

At this time, the plate cylinder 1b for the second color is
The printing operation is started in synchronization with the printing operation, and the printing is started to be rotated at the printing rotation speed. On the inner peripheral side of the plate cylinder 1b, the second color red ink is supplied by the ink roller 3b which is in contact with the inner peripheral surface while rotating in synchronization with the rotation speed of the plate cylinder 1b with the same configuration and operation as the plate cylinder 1a. It is supplied to the inner peripheral side of the plate cylinder 1b. The plate cylinder 1a and the plate cylinder 1b are provided with an initial phase difference in advance so that the reference positions of the black and red images are the same on the printing paper 22. The reason for providing the initial phase difference in advance between the plate cylinder 1a and the plate cylinder 1b is as described above.

Then, while the leading end portion of the printing paper 22 is given a traction force in the traveling direction by the transport belt 16, the printing drum 32b and the press roller 9b in the printing pressure device 32b are synchronized at a predetermined timing synchronized with the rotation of the printing drum 1b. , That is, when the press roller 9b is fed to the print position Eb, the press roller 9b, which has been separated below the outer peripheral surface of the plate cylinder 1b, is swung and raised in synchronization with the feed roller tension, so that the press roller tension 13b The printing pressure is applied to the master 33b and the master 33b is pressed against the master 33b wound around the plate cylinder 1b. As a result, the adhesive force due to the viscosity of the ink oozing out from the opening (not shown) of the plate cylinder 1b causes
At the same time as the master 33b having made the plate comes into close contact with the outer peripheral surface of the plate cylinder 1b, the ink further exudes from the perforation pattern portion of the master 33b which has made the plate, and the exuded ink is transferred to the surface of the printing paper 22, A red print image is formed by the second color red ink.

By the above operation, red printing is performed at the contact portion between the plate cylinder 1b and the press roller 9b in the same positional relationship as the previously printed black image position. The press roller 9b is separated from the outer peripheral surface of the plate cylinder 1b during printing in order to avoid interference with the clamper 5b projecting from the outer peripheral surface of the plate cylinder 1b.
Before the leading edge of the printing paper 22 enters the printing section, the plate cylinder 1b
Is in contact with and pressed against the outer peripheral surface of.

When the leading end of the printing paper 22 on which the second color red print image is formed reaches a position near the leading end of the air knife 7b, the air knife 7b synchronizes with the rotation operation of the plate cylinder 1b. The plate cylinder 1 is rotated around the shaft 8b.
At the same time as approaching the outer peripheral surface of the air knife 7b, the leading end of the printing paper 22 is separated and separated from the plate cylinder 1b by the compressed air flow blown from the leading end of the air knife 7b and the air blown from the discharged air blowing fan 60 of the discharged air blowing means 59. Is done. Air knife 7b
The printed print paper 22 separated and separated by the above is further conveyed by the paper discharge conveyance device 35 to the paper discharge tray 37 located on the downstream side in the paper conveyance direction X.

The air sent by the rotation of the discharge fan 60 is blown onto the surface of the printed printing paper 22 from the upper left of the air knife 7b. this is,
This is also for the purpose of preventing the printed printing paper 22 from floating from the transport belt 40 and promoting the drying of the ink of the printed image.

The air knife 7b and the paper discharge blowing means 59
The printed printing paper 22 separated and separated by the suction is sucked by the operation (operation) of the discharge suction fan 36,
In addition, the air blown by the rotation of the paper discharge fan 60 is attracted to the conveyance belt 40 while preventing the printed printing paper 22 from floating from the conveyance belt 40 while preventing the printed printing paper 22 from rising. The sheets are discharged and stacked on the sheet discharge tray 37 sequentially while the sheets are discharged by a jump table (not shown). In this manner, so-called "printing" or "test printing" is performed, and the press rollers 9a and 9b are separated from the plate cylinders 1a and 1b to return to the initial state shown in FIG. Becomes

After the printing is completed, the user visually confirms the quality of the printed image, the position of the printed image, and the like by visually checking the discharged printed matter, and determines that it is necessary to adjust the position of the printed image in the paper transport direction X, for example. In some cases, a known adjustment may be performed by the vertical movement adjustment means 212 described in JP-A-11-138961. If these are OK, the number of prints is set using the numeric keypad 93, and the print start key 92 is set.
By pressing, each of the paper feeding, printing, and paper discharging processes similar to the above-described printing is repeated for the set number of prints, and all the processes of stencil printing are completed.

Next, referring to FIGS. 5A and 5B and FIG. 7, the sheet leading edge sensor 48 and the registration sensor 49 will be described.
Of the detecting operation of each winding detection sensor 7
The timing of the 4,75 detection operations and the cause system determined based on the detection operation results will be described in detail. (1) Call roller 2 by turning on paper feed motor 44
3 and the separation roller 24 are rotated, and the printing paper 22 on the top surface of the paper feeding tray 21 is separated and fed into one sheet by the cooperative operation with the separation pad 26 at this time.
After a lapse of a predetermined time from the start of the conveyance of the sheet 2,
If the printer 8 does not detect the leading end of the fed printing paper 22, it is a paper transport error including a paper transport jam. That is, if the output signal from the paper leading edge sensor 48 is off at a timing after a predetermined time has elapsed from the start of the transport of the printing paper 22, the control device 100 determines that the paper transport error including the paper transport jam has occurred, and performs printing. The paper 22 is the call roller 23
Further, it is determined that the paper is not fed by the separation roller 24 but is jammed, or that the paper is jammed by the double feeding by the separation roller 24 and the separation pad 26 and is stagnant near the separation roller 24. On the contrary, if the output signal from the sheet leading edge sensor 48 is turned on at a timing after a predetermined time has elapsed from the start of the conveyance of the printing paper 22, the control device 100 determines that the conveyance is normal.

Then, the registration motor 47 is turned on to rotate the registration roller pair 29, 30. After a predetermined time has elapsed from the start of transport of the printing paper 22 by the registration roller pair 29, 30, the registration sensor 49 is fed. If the leading end of the printing paper 22 is not detected, it is a paper transport error including a paper transport jam. That is, the control device 10
0 is a timing after a lapse of a predetermined time from the start of conveyance of the printing paper 22. If the output signal from the registration sensor 49 is off, it is determined that a paper conveyance error including a paper conveyance jam has occurred, and the printing paper 22 It is determined that the paper jam has occurred on the upstream side in the sheet conveyance direction X including the pair 29 and 30 or that the paper jam has occurred due to the double feeding by the separation roller 24 and the separation pad 26 and has stagnated near the separation roller 24. . On the contrary, the control device 100 controls the printing paper 2
If the output signal from the registration sensor 49 is turned on at a timing after a predetermined time has elapsed from the start of the transfer of No. 2, it is determined that the transfer is normal. (2) From the start of conveyance of the printing paper 22 (or the start of printing), the intermediate winding detection sensor 7 at a certain angle K1 of the plate cylinder 1a (the timing of detecting paper winding on the plate cylinder 1a side).
If No. 4 does not detect the print paper 22, it means that the paper has rolled up (miss). That is, the control device 100
Is a timing at which the paper roll is detected on the plate cylinder 1a side.
If the intermediate curl detection sensor 74 is off, it is determined that the paper curl has occurred (miss), and the print paper 22 has jammed on the plate cylinder 1a, or has stagnated near the plate cylinder 1a. Judge that you are. Contrary to this, the control device 100 determines that the conveyance is normal if the intermediate take-up detection sensor 74 is turned on at the timing of detecting the take-up of the paper on the plate cylinder 1a side.

The cause of the sheet winding error on the plate cylinder 1a side is that the intermediate blower fan 51 of the intermediate blower means 50 and / or the air knife 7a shown in FIG. Printed printing paper 2
When the printing paper 22 is conveyed without being separated and separated from the plate cylinder 1a, the printing paper 22 does not pass over the intermediate winding detection sensor 74 and remains wound around the plate cylinder 1a. Another cause is that, in a normal state, the press roller 9a on the side of the plate cylinder 1a rises to apply a printing pressure to the plate cylinder 1a via the print sheet 22 and print on the print sheet 22 while printing on the print sheet 22. Since the press roller 9a does not move up, the printing paper 22 is not conveyed without applying a printing pressure to the plate cylinder 1a. Is detected.

That is, the intermediate winding detection sensor 74
Is a timing at which the paper roll is detected on the plate cylinder 1a side.
This is to detect the occurrence of paper winding due to the printing paper 22 not being separated from the plate cylinder 1a or the occurrence of paper winding due to the pressing by the press roller 9a which is relatively free to contact and separate from the plate cylinder 1a. . (3) From the start of transport of the printing paper 22 (or the start of printing), the paper winding detection sensor 74 detects the printing paper 22 at a certain angle K2 of the plate cylinder 1a (the timing of detecting a paper transport error).
Is not detected, it is a paper transport error. That is,
If the intermediate roll-up detection sensor 74 is kept ON at the timing of detecting the paper transport error on the side of the plate cylinder 1a, the control device 100 keeps the printing paper 22 remaining in the paper transport path and stagnates near the plate cylinder 1a. Judge that you are. Contrary to this, the control device 100 determines that the normal conveyance is performed if the intermediate winding detection sensor 74 is turned off without detecting the printing paper 22 at the timing of detecting the paper conveyance error on the plate cylinder 1a side. to decide.

The cause of the sheet conveyance error on the plate cylinder 1a side is that the printing paper 22 printed by the plate cylinder 1a is not in operation because the intermediate suction fan 18 of the intermediate conveyance device 17 in FIG. A jam condition in which the printing paper 22 remains at the intermediate winding detection sensor 74 due to the poor conveyance by the conveyance device 17 can be cited. Another cause is that the press roller 9b on the side of the plate cylinder 1b does not rise, so that the sheet is not conveyed without applying a printing pressure to the plate cylinder 1b. Is detected, and a jam state in which the printing paper 22 remains at the intermediate winding detection sensor 74 is mentioned.

That is, the intermediate winding detection sensor 74
Is a sheet conveyance error due to the printing paper 22 remaining on the conveyance belt 16 of the intermediate conveyance device 17 or a press which is relatively movable toward and away from the plate cylinder 1b at the timing of detecting the sheet conveyance error on the plate cylinder 1a side. This is to detect whether or not a paper conveyance error has occurred due to no pressing by the roller 9b. (4) From the start of the transport of the printing paper 22 (or the start of printing), at a certain angle K3 of the plate cylinder 1b (the timing of detecting the paper roll on the plate cylinder 1b side), the discharged paper winding detection sensor 7
If No. 5 does not detect the printing paper 22, it means that the paper has rolled up (miss). That is, the control device 100
Is the timing at which the paper roll is detected on the plate cylinder 1b side.
If the paper ejection curl detection sensor 75 is off, it is determined that paper curl has occurred (mis), and the printing paper 22 has jammed in the plate cylinder 1b, or has stagnated near the plate cylinder 1b. Judge that you are. Conversely, the control device 100 determines that the conveyance is normal if the paper ejection curl detection sensor 75 is on at the paper curl detection timing on the plate cylinder 1b side.

The cause of the sheet winding error on the plate cylinder 1b side is that the sheet discharge fan 60 and / or the air knife 7b of the sheet discharge blower 59 in FIG. 1 do not operate (operate). Printing paper 2 printed in 1b
When the printing paper 22 is conveyed without being separated and separated from the plate cylinder 1b, the printing paper 22 does not pass over the paper discharge winding detection sensor 75 and remains wrapped around the plate cylinder 1b. As another cause, in a normal state, the press roller 9b on the side of the plate cylinder 1b rises to apply a printing pressure to the plate cylinder 1b via the printing paper 22, and discharge and convey while printing on the printing paper 22. The printing paper 22 is not conveyed without applying a printing pressure to the plate cylinder 1b because the press roller 9b does not rise. It is detected that nothing exists.

That is, the paper ejection winding detection sensor 75
Is the timing at which the paper roll is detected on the plate cylinder 1b side.
This is to detect whether the paper roll has risen due to the printing paper 22 not being separated from the plate cylinder 1b or whether the paper roll has risen due to the fact that the press roller 9b, which is relatively free to contact and separate from the plate cylinder 1b, is not applied. . (5) From the start of conveyance of the printing paper 22 (or the start of printing), the discharge winding detection sensor 75 at a certain angle K4 of the plate cylinder 1b (timing of sheet conveyance error detection on the side of the plate cylinder 1b).
If does not detect the print paper 22, it is a paper transport error. In other words, if the paper discharge roll-up detection sensor 75 remains on at the timing of detecting a paper transport error on the side of the plate cylinder 1b, the control device 100 determines that the printing paper 22 remains in the paper transport path and Is determined to be stagnant. Contrary to this, the control device 100 determines that the normal conveyance is performed if the discharge winding detection sensor 75 is turned off without detecting the printing paper 22 at the timing of detecting the paper conveyance error on the plate cylinder 1b side. to decide.

The cause of the sheet conveyance error on the plate cylinder 1b side is that the discharge paper suction fan 36 of the sheet discharge conveyance device 35 shown in FIG. Is not properly conveyed by the paper discharging and conveying device 35, a jam state in which the printing paper 22 remains at the paper discharge winding detection sensor 75 and is not conveyed to the paper discharging tray 37 may be mentioned.

That is, the paper discharge winding detection sensor 75
Is to detect the occurrence of a paper transport error due to the print paper 22 remaining on the transport belt 40 of the paper discharge transport device 35 at the paper transport error detection timing on the plate cylinder 1b side. (Operation Example) As described above, for example, the following operation example is assumed as the stencil printing operation is continued until the power switch of the stencil printing apparatus 500 is turned on and then turned off. That is, the operation time of the stencil printing apparatus 500 is 100
It is assumed that the time has been reached and the paper has rolled up six times on the plate cylinder 1b side.

In this state, the paper discharge winding detection sensor 75 has detected a total of six off-states at the paper winding detection timing on the plate cylinder 1b side. At this time, the counter 105 of the control device 100 counts (counts) six times as the number of occurrences of sheet winding on the plate cylinder 1b side. The six occurrences are stored in the RAM 102. Further, the timer 104 is used for the stencil printing apparatus 5.
A total of 100 hours are counted as the 00 operation time.

At this time, the control device 100
The data on the number of occurrences of the counter 105 and the operating time data of the timer 104 stored in the ROM are stored in the ROM
The number of occurrences data (5 times) and the operation time data (100 hours) of the stencil printing apparatus 500 stored in advance in the memory 103 are compared, checked, and checked to determine whether the stencil printing apparatus 500 has a predetermined operation time (100 hours). It is determined that the number of occurrences (6 times) of the paper curling up at the location where the occurrence has occurred is greater than the preset number of times (5 times),
The liquid crystal display unit 95 is controlled so as to display the location of occurrence and the component where the malfunction has occurred.

The cause of paper winding error on the plate cylinder 1b side is as described in the above (5). That is, the control device 100 displays, for example, the display “jam occurrence location: paper curl on the plate cylinder 1b side” and “operation failure occurrence component: paper discharge fan 60 or air knife 7b” as shown in FIG. The liquid crystal display 95 is configured to display the location of the jam on the character display 95b of the liquid crystal display 95 on the picture display 95a of the liquid crystal display 95.
Will be controlled. In addition, as described collectively in the above (5), the fact that the press roller 9b does not rise is also cited as a place where a jam occurs and a part where a malfunction occurs, but this description is omitted for simplification of description.

The user visually recognizes the location of the occurrence of the jam and the part where the malfunction has occurred displayed on the picture display part 95a and the character display part 95b of the liquid crystal display part 95 in FIG. Such a component malfunction can be specifically, easily and reliably known. Therefore, it is easy and reliable to search for the location or cause of the repair that is to be performed after the jam has been cleared.Therefore, it is appropriate to notify the serviceman of the location of the failure and to arrange or replace the failed component. And the machine will not stop for a long time.
In other words, it is possible to immediately know the component information that causes a paper error, to promptly arrange or replace components at the time of repair, and to shorten the time required for repair. In addition, it is also possible to detect a component whose operation is unstable, and to detect a component failure or the like that becomes defective due to durability reliability such as abrasion before the machine stops due to a failure and becomes unusable. become.

After the user or service person clears and repairs the jam, the control device 100 automatically resets only the counter 105 corresponding to the occurrence location, and the same control operation as described above is continuously performed. It will be. (Second Embodiment) FIG. 8 shows a control configuration according to a second embodiment of the present invention. This second embodiment is an embodiment corresponding to claim 13. This second embodiment is similar to the first embodiment.
As compared with the second embodiment, as shown in FIG. 8, the liquid crystal display unit 95 having the function and configuration as the notifying unit in the first embodiment is removed, and the control unit as the control unit in the first embodiment is removed. Control device 100 having function and configuration
Function as the control means in place of the CPU 101
Control device 100A with its configuration removed and its CPU 10
1A, the RAM 10 in the first embodiment
2 has a RAM 102A which is a non-volatile memory, has a ROM 103A in place of the ROM 103 in the first embodiment, and
The main difference is that a personal computer 200 (hereinafter, abbreviated as “personal computer 200”) that transmits and receives data to and from the CPU 101A of 0A is provided.

The RAM 102A is, for example, a nonvolatile memory having a backup power supply. RAM 102A
Is based on each signal from the counter 105 as each sheet error counting unit and the timer 104 as the time counting unit, and based on the respective signals from the stencil printing apparatus 500 within a predetermined operation time, a sheet conveyance error or a sheet winding error at each occurrence position. It has a function and configuration as storage means for storing the number of occurrences of rising.

A personal computer 200 is a personal computer (not shown)
CPU 10 of control device 100A via a controller or the like
It is electrically connected to 1A and is online. The personal computer 200 includes, for example, a screen display unit 201 (notification unit) capable of performing display and notification substantially the same as the liquid crystal display unit 95 of the first embodiment. PC 20
0 has a CPU or the like having substantially the same function and configuration as the control unit in the first embodiment. That is,
The personal computer 200 is a CPU 101A of the control device 100A.
The predetermined operation of the stencil printing apparatus 500 is performed on the basis of the data on the number of times of paper transport error or paper curl for each occurrence location which has occurred within the predetermined operation time stored in the RAM 102A and transmitted through the RAM 102A. The screen display unit 2 displays and notifies the occurrence location when the number of occurrences of paper transport error or paper curl at each occurrence location within a time period is greater than a preset number of times.
01 is provided.

The screen display unit 201 may be composed of, for example, the same liquid crystal display device as in the first embodiment, or may be a CRT display screen device. ROM10
The data for controlling the driving of the main motor 81, the program for performing the operation described later, and the like are stored in advance in 3A. More specifically, the technical items described in (1) to (5), which are the same as those in the first embodiment, that is, the timing of the detection operation of the sheet leading edge sensor 48 and the registration sensor 49, and the timing of the winding detection sensors 74 and 75 The timing of the detection operation, the relation data between the cause system determined by the result of the detection operation and the location of occurrence, and the like are stored in advance. In the RAM 102A, in addition to the functions described above,
Data signals from the keys, sensors, and the like are temporarily stored.

Under substantially the same conditions as those in the operation example of the first embodiment (operation time of the stencil printing apparatus 500 for 100 hours, paper winding on the plate cylinder 1b side occurs six times), the operation of the second embodiment will be described. An operation example will be described. Similarly to the conditions of the operation example of the first embodiment, while the stencil printing operation is continued until the power switch of the stencil printing device 500 is turned on and off, for example, the operation of the stencil printing device 500 is continued. It is assumed that the time has reached 100 hours and the paper has rolled up six times on the plate cylinder 1b side.

In this state, the paper discharge winding detection sensor 75 has detected a total of six off-states at the timing of detecting the paper winding on the plate cylinder 1b side. At this time, in FIG. 8, the counter 105 of the control device 100A counts (counts) six times as the number of occurrences of sheet winding on the plate cylinder 1b side. In addition, the timer 104 counts a total of 100 hours as the operation time of the stencil printing apparatus 500. The six occurrences and the operation time of the stencil printing apparatus 500 for a total of 100 hours are stored and stored in the RAM 102A, which is the non-volatile memory.

At this time, the personal computer 200
0A CPU 101A and RAM 102A transmitted online via the personal computer controller
The number-of-occurrence data of the counter 105 and the operation time data of the timer 104 stored and held in the personal computer 200 are stored in the ROM or PROM (not shown) of the personal computer 200 in advance. Comparison with operation time data (100 hours)
As a result of the check, the number of times (6 times) of paper curling up at the above-mentioned occurrence location within a predetermined operation time (100 hours) of the stencil printing apparatus 500 is larger than a preset number of times (5 times). Is determined, and the screen display unit 20 is displayed so as to display the occurrence location and the operation failure occurrence component.
Control 1 Thereby, for example, the character display unit 95b and the picture display unit 95 in FIG.
A display similar to that shown in FIG.

By visually recognizing the location of the occurrence of a jam and the part where a malfunction has occurred displayed on the screen display unit 201, the user or the serviceman can identify the malfunction of the part or the malfunction of the part that does not operate frequently. And easily and reliably. Therefore, it is easy and reliable to search for the location or cause of the repair that is to be performed after the jam has been cleared.Therefore, it is appropriate to notify the serviceman of the location of the failure and to arrange or replace the failed component. And the machine will not stop for a long time. That is, the above-described advantages similar to those of the first embodiment can be obtained.

After the user or service person clears and repairs a jam, only the counter 105 corresponding to the above-mentioned location is automatically reset by a command from the personal computer 200 or the control device 100A, and the same control operation as described above is performed. Will be continuously performed.

Further, another configuration example can be as follows. That is, for example, instead of the personal computer 200 shown in FIG.
By bringing a display means such as a liquid crystal display device having substantially the same functions as the above and connecting this display means to the control device 100A, it is possible to operate in substantially the same manner as the above-described operation example of the second embodiment. Of course it is possible.

Note that the personal computer 200 is not limited to the above-described functions, and data transmitted online via the CPU 101A of the control device 100A and the personal computer controller, that is, of the stencil printing device 500 stored and held in the RAM 102A. A function having a function of controlling the screen display unit 201 so as to display / notify the occurrence position at any time based on data on the number of occurrences of sheet transport errors or paper curling for each occurrence position occurring within a predetermined operation time It may be. (Third Embodiment) The third embodiment is an embodiment corresponding to claims 8 to 12. In the third embodiment, the invention according to claims 8 to 12 is applied to a single cylinder stencil printing apparatus instead of the so-called double cylinder stencil printing apparatus 500. The third embodiment differs from the first embodiment in that the plate cylinder 1b, the air knife 7b, the intermediate conveying device 17, Blower 50, printing device 32b, intermediate winding detection sensor 74, home position sensor 70
The main difference lies in that a single plate cylinder 1a and the components after the above-mentioned removal are removed by removing b and the like, and that a control device (not shown) to be described later is provided instead of the control device 100 in FIG. . As described above, the configuration around the plate cylinder 1a in the third embodiment is such that the paper discharge blowing unit 59, the paper discharge conveyance device 35, the paper discharge tray 37, and the like are moved to the right side in FIG.

The paper ejection curl detection sensor 75 has a function and configuration as a paper error detecting means described in the section for solving the problem. The control device according to the third embodiment has the function and configuration of the control means described in the section for solving the problem. That is, referring to FIG. 1, the control device, based on each signal from the counter 105 and the timer 104, controls each of the occurrence locations generated within a predetermined operation time of the single cylinder stencil printing apparatus. When the number of occurrences of paper transport errors or paper curling is greater than a preset number of times, it has a function as a control unit that controls the liquid crystal display unit 95 to display and notify the location where the occurrence has occurred.

Further, in the first embodiment, FIG.
The technical matters (1) to (5) described with reference to (a) and (b) and FIG. can do. Regarding the technical matter (1), the “control device 100” in the first embodiment is referred to as “the control device”.
(This technical matter is referred to as (A)).

Regarding the above technical item (4), “plate cylinder 1
“b” to “plate cylinder 1a”, “certain angle K3” to “certain angle K1”, and “control device 100” in the first embodiment.
Are replaced with “the control device” and “press roller 9b” with “press roller 9a”, respectively.
In (b), if the timing chart of the home position sensor 70b and the paper ejection curl detection sensor 75 is deleted, and the timing chart of the intermediate paper curl detection sensor 74 is changed to the timing chart of the paper ejection curl detection sensor 75, it can be applied almost as it is ( This technical matter is referred to as (B)).

Regarding the above technical matter (5), “plate cylinder 1
“b” to “plate cylinder 1a”, “certain angle K4” to “certain angle K2”, and “control device 100” in the first embodiment.
Is read as “the above control device”, and FIG.
In (b), if the timing chart of the home position sensor 70b and the paper ejection curl detection sensor 75 is deleted, and the timing chart of the intermediate paper curl detection sensor 74 is changed to the timing chart of the paper ejection curl detection sensor 75, it can be applied almost as it is ( This technical matter is referred to as (C)).

The third embodiment can be extremely easily implemented based on the above-described configuration, the technical items (A), (B), (C) and the operation example of the first embodiment. Therefore, further detailed description is omitted. (Fourth Embodiment) This fourth embodiment is defined by claim 14
This is an embodiment corresponding to FIG. In the fourth embodiment, the invention described in claim 14 is applied to a single cylinder stencil printing apparatus instead of the so-called double cylinder stencil printing apparatus 500. The fourth embodiment is different from the second embodiment in that the plate cylinder 1b, the air knife 7b, the intermediate conveying device 17, By removing the blowing means 50, the printing device 32b, the intermediate winding detection sensor 74, the home position sensor 70b, and the like,
The main difference lies in having a single plate cylinder 1a and the components after the removal. Around the plate cylinder 1a in the fourth embodiment, the paper discharge blower 59, the paper discharge conveyance device 35, the paper discharge tray 37, and the like are arranged as if moved to the right in FIG.

The control configuration of the fourth embodiment will be described in more detail with reference to FIG. That is, the paper ejection winding detection sensor 75 according to the fourth embodiment.
Has a function and a configuration as a paper error detecting unit described in a unit column for solving the problem. The RAM 102A of the fourth embodiment is, for example, a nonvolatile memory provided with a backup power supply. The RAM 102A is configured to transfer a sheet at each occurrence position within the predetermined operation time of the single-stencil stencil printing apparatus based on signals from the counter 105 as sheet error counting means and the timer 104 as time counting means. It has a function and configuration as a storage unit for storing the number of occurrences of mistakes or paper curling. The personal computer 200 according to the fourth embodiment is different from the CP of the control device 100A.
Based on the paper transport error or the number of times of paper curl for each occurrence location, which is transmitted through U101A and stored in the RAM 102A and stored in the RAM 102A during the predetermined operation time of the single cylinder stencil printing apparatus. When the number of occurrences of paper conveyance errors or paper curling at each occurrence location within a predetermined operation time of the single cylinder type stencil printing apparatus is greater than a preset number of occurrences, the occurrence location is determined. Has a function of controlling the screen display unit 201 so as to display and inform the user.

The ROM 103A stores in advance data for controlling the driving of the main motor 81, programs for performing the operations described later, and the like. More specifically, the timing of the detection operation of the sheet leading edge sensor 48 and the registration sensor 49, the timing of the detection operation of the paper ejection curl detection sensor 75, and the relation data between the cause system and the occurrence location determined based on the detection operation result, etc. Is stored in advance. In addition, the above technical items (A), (B), and (C) replaced in the third embodiment can be omitted simply by replacing the “control device” with “control device 100A” shown in FIG. Applicable as it is.

Note that the personal computer 200 of the fourth embodiment
Is not limited to the functions described above, and the CPU of the control device 100A
101A and data transmitted online via the personal computer controller, ie, RAM 10
The occurrence location is displayed at any time based on the data on the number of times of paper transport error or paper curl for each occurrence location which occurred within a predetermined operation time of the single cylinder type stencil printing apparatus stored in 2A. -It may have a function of controlling the screen display unit 201 to notify.
The fourth embodiment can be extremely easily implemented based on the above-described configuration, operation examples of the second and third embodiments, and the like, and therefore, further detailed description will be omitted.

The present invention is not limited to the stencil printing apparatus 500 shown in FIG. 7 to which the first and second embodiments are applied, but is disclosed, for example, in FIGS. 1, 8 to 10 of Japanese Patent Application Laid-Open No. 11-34467. The present invention can be applied to a stencil printing apparatus as described above, or a double-cylinder printing apparatus as disclosed in, for example, FIG. 1 of JP-A-11-151852. That is, in addition to the stencil printing apparatus 500 shown in FIG. 7, a stencil making apparatus corresponding to each plate cylinder 1a, 1b, and a plate cylinder 1a, 1
The apparatus may include a plate discharging device corresponding to each of the printers b and a document reading device (not shown) that is disposed above the plate making devices and the plate discharging devices and reads an image of a document. The data for plate making may be data read by the document reading device as described above or data created by a computer or the like.

The configuration and arrangement of each of the above-described devices constituting the stencil printing apparatus 500 shown in FIG. 7 is merely an example, and other well-known devices are configured in various arrangements. It goes without saying that this may be done. In the first and second embodiments described above, description will be made before and after. However, thin paper that is likely to be rolled up may be used, and even if printing conditions are poor such as high temperature and high humidity, paper errors such as jams may occur. To reduce the likelihood of
In addition to the air knives 7a and 7b, the intermediate blowing means 50 and the paper discharge blowing means 59 are used, but of course the following configuration example may be used. That is, for example, according to the difference in the type of the printing paper 22 to be used or the difference in the use environment condition of the apparatus, instead of the air knives 7a and 7b, it is possible to swing around the outer peripheral surfaces of the plate cylinders 1a and 1b. The air knife 7a, 7b may be removed from the stencil printing apparatus 500, and only the intermediate blowing means 50 and the discharged paper blowing means 59 may be used. It may be a device that uses. Needless to say, these can be applied mutatis mutandis to the single cylinder type stencil printing apparatus in the third and fourth embodiments. The present invention is naturally applicable to monochrome and color copiers such as an electrophotographic system. As described above, the present invention has been described with respect to the specific embodiments and the like including the examples. However, the configuration of the present invention is not limited to the above-described embodiments and the like, and may be configured by appropriately combining these. It will be apparent to those skilled in the art that various embodiments and examples can be configured according to the necessity, application, and the like within the scope of the present invention.

[0133]

As described above, according to the present invention,
A new printing apparatus can be provided by solving the problems of the conventional apparatus as described above. The effects of each claim are as follows. According to the first aspect of the present invention, a sheet conveyance error or a plate cylinder is provided corresponding to a sheet conveyance error detected for each of a plurality of sheet error detection means or a position where a sheet roll-up occurs in each plate cylinder. Based on each signal from each sheet error counting means for counting the number of occurrences of paper curling in each of the occurrence locations and the timing means for timing the operation time of the printing apparatus, for each occurrence location within a predetermined operation time When the number of occurrences of paper conveyance errors or paper curling is greater than a preset number of times, the control unit and the like for controlling the notifying unit so as to notify the location where the occurrence has occurred. It is possible to immediately identify the location where paper transport errors including transport jams or paper roll-ups on the plate cylinder often occur, and thus to immediately know the component information that may cause paper errors. It is possible, it is possible to easily to make arrangements and replacement of parts at the time of repair.

According to the second aspect of the present invention, the location where the paper transport error or the roll-up of the paper on each plate cylinder, which is reported by the reporting means, includes the component information disposed near the location where the occurrence. Thus, in addition to the effect of the invention described in claim 1, the user can immediately know the component information that causes the paper error, and can easily arrange or replace the component when repairing it. It can be carried out.

According to the third aspect of the present invention, the paper error detecting means provided in the intermediate conveying means separates the printing paper from the upstream plate cylinder at the timing of detecting the paper winding on the upstream plate cylinder side. The user or the like according to claim 1 can detect whether the paper is rolled up due to not being pressed or whether or not the paper is rolled up due to not being pressed by the pressing means which can be relatively moved toward and away from the upstream plate cylinder. The occurrence location or the occurrence location including the component information described in claim 2 can be immediately known.

According to the fourth aspect of the present invention, the sheet error detecting means provided in the intermediate conveying means detects the printing sheet remaining on the intermediate conveying means at the timing of detecting the sheet error on the upstream plate cylinder side. 2. The user according to claim 1, wherein the user or the like detects the occurrence of a paper transport error due to the occurrence of a paper transport error due to the occurrence of a paper transport error due to a pressing operation that is relatively free to approach and separate from the downstream plate cylinder. Or the location including the component information according to claim 2 can be immediately known.

According to the fifth aspect of the present invention, the sheet error detecting means provided in the sheet discharging / conveying means prints from the most downstream plate cylinder at the timing of detecting the paper winding on the most downstream plate cylinder side. By detecting whether the paper is rolled up due to the paper not being separated or whether the paper roll is rolled up due to the pressure not being applied to the downstream plate cylinder by the relatively freely contactable pressing means, the user etc. It is possible to immediately know the occurrence location described in (1) or the occurrence location including the component information described in (2).

According to the sixth aspect of the present invention, the sheet error detecting means provided in the sheet discharging and conveying means prints on the sheet discharging and conveying means at the timing of detecting the sheet conveying error on the most downstream plate cylinder side. By detecting whether or not a paper transport error has occurred due to remaining paper, a user or the like can immediately know the location of the occurrence described in claim 1 or the occurrence location including the component information described in claim 2.

According to the seventh aspect of the present invention, the control means controls the notifying means so as to notify the occurrence position of the sheet conveyance error or the sheet winding up at each plate cylinder, and then responds to the occurrence position. By resetting only the paper error counting means, the paper error counting means corresponding to the occurrence location can be newly activated from the next time, and the operation of other paper error counting means not corresponding to the occurrence location can be performed. Can be continued.

According to the eighth aspect of the present invention, a sheet conveyance error detected by the sheet error detection means or a position where the sheet rolls up on the plate cylinder occurs, and is provided. Based on the signals from the sheet error counting means for counting the number of occurrences of paper winding for each occurrence location and the timing means for timing the operation time of the printing apparatus, the paper conveyance for each occurrence location within a predetermined operation time is performed. When the number of occurrences of mistakes or paper curling is greater than a preset number of times, the user has control means for controlling the notifying means so as to notify the occurrence position, so that the user etc. It is possible to immediately identify the location where paper misfeeding or paper curling up frequently occurs on the plate cylinder, and immediately find information on parts that could cause paper misfeeds. Making it possible to Rukoto, it is possible to easily to make arrangements and replacement of parts at the time of repair.

According to the ninth aspect of the present invention, the location where the paper transport error or the paper roll-up on the plate cylinder reported by the reporting means includes the component information disposed near the location where the paper transport error occurs. As a result, in addition to the effect of the invention described in claim 8, the user or the like can immediately know the part information causing the paper error, and easily arrange or replace the part when repairing. be able to.

According to the tenth aspect of the present invention, the sheet error detecting means provided in the sheet discharging / conveying means detects that the printing sheet is not separated from the plate cylinder at the timing of detecting the winding of the sheet on the plate cylinder. 10. A user or the like according to claim 8 or 9 by detecting whether or not the paper has rolled up due to the curling up or the pressing of the plate cylinder by a pressing means which is relatively free to contact and separate. The occurrence location including the described component information can be immediately known.

According to the eleventh aspect of the present invention, the sheet error detecting means disposed in the sheet discharging and conveying means detects that the printing paper remains on the sheet discharging and conveying means at the timing of detecting the sheet conveying error in the plate cylinder. By detecting the occurrence of a paper transport error due to the presence of the user, the user or the like can immediately know the location of the occurrence described in claim 8 or the location including the component information described in claim 9.

According to the twelfth aspect of the present invention, the control means controls the notifying means so as to notify the paper transport error or the location where the paper rolls up on the plate cylinder. By resetting only the error counting means, the paper error counting means corresponding to the occurrence location can be newly activated from the next time, and the operation of other paper error counting means not corresponding to the occurrence location can be continued. Can be done.

According to the thirteenth aspect of the present invention, a plurality of sheet error detecting means are provided corresponding to a sheet conveyance error detected at each of a plurality of sheet error detecting means or a position at which a sheet rolls up at each plate cylinder.
A predetermined operation time is determined based on each signal from each sheet error counting unit that counts the number of occurrences of sheet conveyance errors or sheet windings on each plate cylinder for each occurrence position and a timing unit that counts the operation time of the printing apparatus. For example, a user or a service person connects a personal computer, a computer, or a notification unit to the storage unit by having a storage unit for storing the number of occurrences of paper conveyance errors or paper curling for each occurrence location within the storage unit. This makes it possible to obtain the above-mentioned occurrence frequency data online and notify it, and it is possible to immediately know the location where the paper transport error including the paper transport jam or the paper roll-up at the plate cylinder often occurs, and as a result, Parts information that can cause paper errors can be immediately known, and parts can be easily arranged or replaced when repairing It is possible to perform.

According to the fourteenth aspect of the present invention, a sheet conveyance error detected by the sheet error detection means or a position where the sheet rolls up on the plate cylinder occurs, and is provided in correspondence with the sheet conveyance error or the plate cylinder. Based on the signals from the sheet error counting means for counting the number of occurrences of paper winding for each occurrence location and the timing means for timing the operation time of the printing apparatus, the paper conveyance for each occurrence location within a predetermined operation time is performed. By having storage means for storing the number of occurrences of mistakes or paper curling, for example, a user or service person can obtain the above-mentioned number of occurrences data online by connecting a personal computer, computer, or notification means to the storage means. To cause notification, and often causes paper transport errors including paper transport jams or paper roll-up at the plate cylinder Since it is possible to know the raw place immediately, and thus the parts information that causes the paper mistakes it is possible to know immediately, it is possible to easily to make arrangements and replacement of parts at the time of repair.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a control configuration according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part around a home position sensor according to the first embodiment.

FIG. 3 is a plan view of an operation panel according to the first embodiment.

FIG. 4 is a schematic block diagram around a plate cylinder driving unit in the first embodiment.

FIG. 5A is a schematic front view showing the arrangement of an intermediate curling detection sensor and a paper discharge curling detection sensor in the first embodiment, and FIG. 5B shows the operation of each of the curling detection sensors. FIG.

FIG. 6 is a schematic front view for explaining an arrangement relationship of each plate cylinder of the stencil printing machine shown in FIG. 7;

FIG. 7 is a schematic front view of the stencil printing apparatus showing the first embodiment to which the present invention is applied, as viewed from the near side of the main body frame.

FIG. 8 is a block diagram illustrating a control configuration according to a second embodiment of the present invention.

[Explanation of symbols]

1a, 1b Plate cylinder 17 Intermediate transport device as intermediate transport means 18 Intermediate suction fan 22 Printing paper 33a, 33b Master 35 Discharge transport device as paper discharge transport device 36 Discharge suction fan 48 Sheet leading edge as paper error detection device Sensor 49 Registration sensor as paper error detecting means 50 Intermediate air blowing means 51 Intermediate air blowing fan 59 Discharge air blowing means 60 Paper discharging air blowing fan 70a, 70b Home position sensor 74 Intermediate winding detection sensor as paper error detecting means 75 Paper error detection Paper discharge winding detection sensor 81 as a means 81 main motor 90 operation panel 95 liquid crystal display unit 100, 100A as an example of notification means control device 101 CPU as control means 102 RAM as storage means 102A RAM 103A as storage means, 1 03A ROM 104 Timer as time counting means 105 Counter as paper error counting means 500 Stencil printing apparatus 501 as an example of printing apparatus 501 Body frame X Paper transport direction

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65H 7/06 B65H 7/06

Claims (14)

[Claims] A plurality of plate cylinders arranged in a sheet conveying direction;
In a printing apparatus that supplies ink to a master on each plate cylinder and prints on printing paper, a plurality of paper error detection means for detecting whether a paper conveyance error or a paper curling has occurred on each of the plate cylinders is provided. A plurality of sheet error detecting means provided for each of the sheet conveyance errors detected by the plurality of sheet error detection means or a position at which the sheet rolls up at each of the plate cylinders; Sheet error counting means for counting the number of rises for each occurrence location; clock means for counting the operation time of the printing apparatus; notification means capable of notifying the occurrence location; Based on each signal from the means and the timing means, the number of occurrences of the paper transport error or the paper curl for each occurrence location occurring within the predetermined operation time is set in advance. When more than a constant number, printing apparatus characterized by comprising a control means for controlling the informing means so as to notify the occurrence location, a. 2. The printing apparatus according to claim 1, wherein the occurrence location notified by the notification means includes component information disposed near the occurrence location. 3. The printing apparatus according to claim 1, wherein an upstream plate cylinder is disposed on an upstream side in the sheet conveying direction.
An intermediate transport for transporting the printing paper printed by the upstream plate cylinder to the downstream plate cylinder is provided between the upstream plate cylinder and a downstream plate cylinder adjacent to the upstream plate cylinder. The paper error detecting means is provided in the intermediate conveyance means, and the paper error detecting means is configured to detect the paper roll on the upstream plate cylinder side and to detect the paper winding up on the upstream plate cylinder. Detecting whether or not the paper has been rolled up due to the fact that the printing paper is not separated from the paper roll or the pressing of the upstream plate cylinder by a pressing means that is relatively free to contact and separate is not applied. Printing device. 4. The printing apparatus according to claim 1, wherein an upstream plate cylinder is disposed on an upstream side in the sheet conveying direction.
An intermediate transport for transporting the printing paper printed by the upstream plate cylinder to the downstream plate cylinder is provided between the upstream plate cylinder and a downstream plate cylinder adjacent to the upstream plate cylinder. The paper error detection means is provided in the intermediate conveyance means, and the paper error detection means is provided on the intermediate conveyance means at a paper conveyance error detection timing on the upstream plate cylinder side. Detecting the occurrence of the paper transport error due to the paper transport error due to the remaining print paper or the paper transport error due to the pressure not being applied to the downstream plate cylinder by the pressing means that can be relatively moved toward and away from the downstream plate cylinder. Printing device. 5. The printing apparatus according to claim 1, wherein a printing sheet printed by the most downstream plate cylinder is located downstream of the most downstream plate cylinder disposed on the most downstream side in the sheet transport direction. The paper error detecting means is disposed in the paper discharging and conveying means, and the paper error detecting means is provided at the most downstream plate cylinder side. At the winding detection timing, the printing paper is not separated from the lowermost plate cylinder, and the paper is rolled up, or the pressing is not applied to the lowermost plate cylinder by a pressing means which is relatively free to contact and separate. A printing apparatus for detecting whether or not a paper roll has occurred. 6. The printing apparatus according to claim 1, wherein a printing sheet printed by the most downstream plate cylinder is located downstream of the most downstream plate cylinder disposed on the most downstream side in the sheet transport direction. The paper error detecting means is disposed in the paper discharging and conveying means, and the paper error detecting means is provided at the most downstream plate cylinder side. A printing apparatus, wherein at a transport error detection timing, it is detected whether or not a paper transport error has occurred due to print paper remaining on the paper discharge transport unit. 7. The printing apparatus according to claim 1, wherein the control unit controls the notifying unit so as to notify the occurrence location, and then controls the notification unit corresponding to the occurrence location. A printing apparatus characterized in that only the paper error counting means is reset. 8. A printing apparatus which supplies ink to a master on a plate cylinder and prints on printing paper, wherein a sheet error detecting means for detecting a sheet conveyance error or a sheet roll-up on the plate cylinder. And a number of occurrences of the sheet conveyance error or the sheet winding up at the plate cylinder provided corresponding to the sheet conveyance error detected by the sheet error detection means or the sheet winding up position at the plate cylinder. Paper error counting means for counting each occurrence location, timing means for counting the operating time of the printing apparatus, notification means capable of notifying the occurrence location, paper error counting means and the timing means A predetermined number of occurrences of the paper transport error or the paper curling for each occurrence location within the predetermined operation time based on each signal from When the remote lot,
And a control means for controlling the notifying means so as to notify the occurrence position thereof. 9. The printing apparatus according to claim 8, wherein the occurrence location notified by the notifying unit includes component information disposed near the occurrence location. 10. The printing apparatus according to claim 8, further comprising a discharge conveyance means for discharging printed printing paper downstream of the plate cylinder in the paper conveyance direction, wherein The detecting means is provided in the sheet discharging / conveying means, and the sheet error detecting means is configured to detect the winding of the sheet at the plate cylinder and detect the sheet winding due to the printing paper not being separated from the plate cylinder. Alternatively, the printing apparatus detects whether or not the paper has rolled up due to the fact that the pressing by the pressing means which can be relatively moved toward and away from the plate cylinder is not applied. 11. The printing apparatus according to claim 8, further comprising a discharge conveyance means for discharging printed printing paper downstream of the plate cylinder in a paper conveyance direction, wherein The detecting means is provided in the paper discharging and conveying means, and the paper error detecting means is provided at the timing of detecting the paper conveying error in the plate cylinder, because the printing paper remains on the paper discharging and conveying means. A printing apparatus for detecting whether or not the paper transport error has occurred. 12. The printing apparatus according to claim 8, wherein the control means controls the notifying means so as to notify the occurrence location, and then controls the notifying means corresponding to the occurrence location. A printing apparatus characterized in that only the paper error counting means is reset. 13. A printing apparatus which has a plurality of plate cylinders arranged in a sheet conveying direction and supplies ink to a master on each plate cylinder to print on printing paper. A plurality of paper error detecting means for detecting the presence or absence of the occurrence of paper winding; and a position where the paper conveyance error detected by each of the plurality of paper error detecting means or the paper winding in each plate cylinder occurs. Correspondingly provided, sheet error counting means for counting the number of occurrences of the sheet conveyance error or sheet winding in each plate cylinder for each occurrence location, and time counting means for counting the operation time of the printing apparatus, Based on each signal from each of the sheet error counting means and the time counting means, the number of occurrences of the sheet transport error or the sheet curl for each occurrence location within the predetermined operation time is stored. A printing device, comprising: 14. A printing apparatus which supplies ink to a master on a plate cylinder and prints on printing paper, wherein a paper error detecting means for detecting whether a paper conveyance error or a roll-up of the paper in the plate cylinder has occurred. And a number of occurrences of the sheet conveyance error or the sheet winding up at the plate cylinder provided corresponding to the sheet conveyance error detected by the sheet error detection means or the sheet winding up position at the plate cylinder. Paper error counting means for counting each occurrence location, time counting means for counting the operation time of the printing apparatus, and within a predetermined operation time based on each signal from the sheet error counting means and the time counting means. And a storage unit for storing the number of occurrences of the paper transport error or the paper curl for each occurrence location of the printing device.