JP2001328332A - Printing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a certain fixed printing image quality by a method wherein the optimum printing conditions in response to the kind of paper are set, that is, the optimum ink discharge from the opening portions of a plate cylinder or the perforated portions of a master is controlled. SOLUTION: This printing equipment has a paper kind detection sensor 40, which automatically detects the difference among the surface states of papers, and a controlling means 41C for controlling a thermal head driving board 9 by selecting and setting the predetermined energizing pulse widths among energizing pulse widths (or perforating energies) supplying to the respective heating elements 11a of a thermal head 11 as printing conditions memorized in advance in response to the kind of paper, on the basis of the signal concerning to the paper kind detection sent from the paper kind detection sensor 40 so as to supply the set and predetermined energizing pulse widths to the respective heating elements 11a of the thermal head 11 for generating heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a printing apparatus including a stencil printing apparatus and the like.

[0002]

2. Description of the Related Art Conventionally, stencil printing using a digital thermosensitive stencil printing apparatus has been known as a simpler printing method. This is called a thermal stencil master (hereinafter simply referred to as "master") in which fine heating elements are arranged in a line.
Based on image information, the master is conveyed by a platen roller or the like while applying pressure to the platen roller via a platen roller and applying heat in a pulsed manner to a minute heating element also called a heating portion or a heating element of the thermal head to generate heat. After performing the heat-melting perforation and plate-making, the master is automatically conveyed, automatically wound around the outer peripheral surface of the porous cylindrical plate cylinder, and fed to the master by pressing means such as a press roller or an impression cylinder. The printing paper fed from the paper section is continuously pressed, and the ink in the ink pool provided inside the plate cylinder is supplied to the inner peripheral surface of the plate cylinder by an ink supply member (ink supply means) such as an ink roller. A print image is formed by passing ink from the opening portion of the plate cylinder and the perforated portion of the master and transferring the ink to printing paper.

In the conventional stencil printing machine as described above,
Printing has been performed under certain printing conditions regardless of the type of printing paper (hereinafter simply referred to as “paper”). Alternatively, an operator or user (hereinafter collectively referred to as "user")
It was necessary to determine the printing conditions optimally according to the type of paper and change the printing conditions such as the pressing force of the pressing means against the plate cylinder manually (manually). It was very difficult.

[0004]

In this type of stencil printing apparatus, one of the factors that affect the quality of a printed image is the type of paper, that is, surface smoothness and ink permeability due to differences in the surface condition of the paper. There is a difference. In order to ensure a good print image density, it is necessary to change the printing conditions in accordance with the "paper surface roughness" and "paper ink permeability" of various types of paper. This is because the optimum printing conditions are different for each sheet.

When attention is paid to the roughness of the surface state of the paper, for example, when paper 39B having poor surface smoothness is used as shown in FIG. Is not transferred onto the paper 38B, and the printed image is poor in solid filling.

[0006] The setting of printing conditions includes, for example, a master perforation diameter setting for setting the size of perforations formed in the master, a pressing force (printing pressure) setting for setting a pressing force of the pressing means against the plate cylinder, and a pressing means. In contrast, there is an offset amount setting for setting an offset amount generated when the ink roller is displaced in the rotation direction of the plate cylinder.

Generally, the setting of the drilling energy to be supplied to the heating element required for the master drilling and the setting of the printing pressure are carried out exclusively by a maintenance operation by a serviceman, and the offset amount is adjusted in view of the structure of the apparatus. Not possible.

Further, when determining the optimum print image density based on the type of paper (hereinafter referred to as “paper type”), there is an individual difference in the visual check by a service person, so that the range from which position is treated as appropriate is determined. However, it is difficult to make an objective judgment because the judgment involves ambiguity. For this reason,
In a conventional stencil printing apparatus, even if the print image density changes due to a difference in paper type, general users cannot compensate for it. That is, since the setting of the optimal printing conditions according to the paper type, that is, the control of the optimal ink ejection amount from the opening portion of the plate cylinder or the punching portion of the master is not performed, it is possible to obtain a constant print image quality. There was a problem that it was not possible.

Therefore, an object of the present invention is to solve the above problem by automatically detecting the paper type, manually setting the paper type, or by using these together. An object of the present invention is to determine the type and automatically set an optimal printing condition according to the type of paper, thereby making it possible to appropriately change the print image density and obtain a high-quality print image.

[0010]

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. The invention according to claim 1 is a printing apparatus that performs printing by winding a master made on a plate cylinder around a plate cylinder, supplying ink to the master on the plate cylinder, and pressing a sheet against the master on the plate cylinder. Paper type detecting means for detecting the type of paper, and control means for automatically selecting and setting pre-stored printing conditions in accordance with the type of paper based on a signal from the paper type detecting means. It is characterized by having.

According to a second aspect of the present invention, in the printing apparatus of the first aspect, the paper type detecting means automatically detects a difference in the surface state of the paper.

The invention described in claim 3 is the first or second invention.
In the printing apparatus described above, plate making means having a plurality of heating elements for making a plate on a master, and perforation energy adjusting means for adjusting perforation energy supplied to individual heating elements of the plate making means to predetermined energy, The printing condition is the perforation energy, and the control means selects the predetermined energy from the printing conditions, and adjusts the perforation energy to set the predetermined energy. It is characterized by controlling the means.

The invention according to claim 4 is the first or second invention.
In the printing apparatus described above, an ink supply unit that supplies ink to an inner peripheral surface of the plate cylinder, a pressing unit that presses a sheet against an outer peripheral surface of the plate cylinder, and the ink supply unit with respect to the pressing unit. Offset adjustment means for adjusting an offset amount generated when the cylinder is deviated in the rotation direction to a predetermined offset amount, wherein the printing condition is the offset amount, and the control means is configured to select one of the printing conditions. The method is characterized in that the predetermined offset amount is selected, and the offset adjusting means is controlled so as to set the predetermined offset amount.

According to a fifth aspect of the present invention, there is provided the first or second aspect.
The printing apparatus according to (1), further comprising: pressing means for pressing a sheet against the plate cylinder; and pressing force adjusting means for adjusting a pressing force of the pressing means to the plate cylinder to a predetermined pressing force. A pressing force, wherein the control means selects the predetermined pressing force from the printing conditions, and controls the pressing force adjusting means so as to set the predetermined pressing force.

The invention according to claim 6 is the invention according to claims 1 to 5
In the printing apparatus according to any one of the above, the paper type detecting means has a light emitting means for projecting light on the surface of the paper, and a light receiving means for receiving the reflected light reflected on the surface of the paper, these The two means move relative to the sheet and detect the type of the sheet by recognizing a variation in the light receiving position of the reflected light received by the light receiving means.

According to a seventh aspect of the present invention, a master made on a plate is wound around an outer peripheral surface of a plate cylinder, ink is supplied to the master on the plate cylinder, and printing is performed by pressing a sheet against the master on the plate cylinder. In a printing apparatus, a paper type setting means for setting a paper type according to a difference in the surface state of the paper, and a printing condition stored in advance according to the paper type based on a signal from the paper type setting means. And a control means for selecting and setting an automatic station.

According to an eighth aspect of the present invention, in the printing apparatus according to the seventh aspect, a plate making means having a plurality of heating elements for making a plate on a master, and a perforation for supplying to each heating element of the plate making means. A perforation energy adjustment unit that adjusts energy to a predetermined energy, wherein the printing condition is the perforation energy, and the control unit is
The method is characterized in that the predetermined energy is selected from the printing conditions and the perforation energy adjusting means is controlled so as to set the predetermined energy.

According to a ninth aspect of the present invention, in the printing apparatus of the seventh aspect, there is provided an ink supply unit for supplying ink to an inner peripheral surface of the plate cylinder, and a pressing unit for pressing a sheet against the outer peripheral surface of the plate cylinder. Offset adjusting means for adjusting an offset generated when the ink supply means is deviated in the rotational direction of the plate cylinder with respect to the pressing means to a predetermined offset amount, wherein the printing condition is the offset amount Wherein the control means selects the predetermined offset amount from the printing conditions and controls the offset adjusting means so as to set the predetermined offset amount.

According to a tenth aspect of the present invention, in the printing apparatus according to the seventh aspect, a pressing means for pressing a sheet against the plate cylinder and a pressing means for adjusting a pressing force of the pressing means against the plate cylinder to a predetermined pressing force. Pressure adjusting means, wherein the printing condition is the pressing force, and the control means selects the predetermined pressing force from the printing conditions, and sets the predetermined pressing force. The above-mentioned pressing force adjusting means is controlled.

The configuration of the present invention is not limited to the invention described in each of the above-mentioned claims, and the following technical configuration can be adopted by appropriately combining the above-mentioned plural components and plural printing conditions. That is, the first technical configuration is as follows.
3. The printing apparatus according to claim 1, wherein the plate making means includes a plurality of heating elements for making a plate on a master, and the punching energy supplied to each heating element of the plate making means is adjusted to a predetermined energy. Energy adjusting means, ink supply means for supplying ink to the inner peripheral surface of the plate cylinder, pressing means for pressing a sheet against the outer peripheral surface of the plate cylinder, and the ink supply means for the pressing means Offset adjustment means for adjusting the offset amount generated when the cylinder is deviated in the rotation direction to a predetermined offset amount, wherein the printing conditions are the perforation energy and the offset amount, and the control means The predetermined energy and the predetermined offset amount are respectively selected from printing conditions, and the predetermined energy is set so as to set the predetermined energy. Energy adjustment means for holes, and controlling each said offset adjusting means to set the predetermined offset amount.

According to a second technical configuration, in the printing apparatus according to the first or second aspect, plate-making means provided with a plurality of heating elements for making a master on a master, and perforations to be supplied to individual heating elements of the plate-making means. Energy adjusting means for adjusting the energy for use to a predetermined energy, pressing means for pressing the paper against the plate cylinder, pressing force adjusting means for adjusting the pressing force of the pressing means against the plate cylinder to a predetermined pressing force, Wherein the printing conditions are the perforation energy and the pressing force, and the control means respectively selects the predetermined energy and the predetermined pressing force from the printing conditions, and The energy adjusting means for perforation to set energy, and the pressing force adjusting means is controlled to set the predetermined pressing force, respectively. That.

A third technical configuration is the printing apparatus according to claim 1 or 2, wherein the ink supply means supplies ink to the inner peripheral surface of the plate cylinder, and the pressing means presses a sheet against the outer peripheral surface of the plate cylinder. Offset adjusting means for adjusting the offset amount generated when the ink supply means is deflected with respect to the pressing means in the rotational direction of the plate cylinder to a predetermined offset amount; and pressing force of the pressing means against the plate cylinder. And a pressing force adjusting means for adjusting the pressing force to a predetermined pressing force. The offset adjusting means is configured to select a predetermined pressing force and set the predetermined offset amount, and the pressing force adjusting means is configured to set the predetermined pressing force. And controlling, respectively.

According to a fourth technical configuration, in the printing apparatus according to the first or second aspect, plate making means provided with a plurality of heating elements for making a master plate, and perforations to be supplied to individual heating elements of the plate making means. Energy adjusting means for adjusting energy for use to a predetermined energy, ink supply means for supplying ink to the inner peripheral surface of the plate cylinder, pressing means for pressing a sheet against the outer peripheral surface of the plate cylinder, and this pressing means Offset adjusting means for adjusting the offset amount generated when the ink supply means is displaced in the rotation direction of the plate cylinder to a predetermined offset amount; and a pressing force of the pressing means against the plate cylinder being a predetermined pressing force. The printing conditions are the perforation energy, the offset amount, and the pressing force, and the control unit controls the printing The predetermined energy, the predetermined offset amount, and the predetermined pressing force are respectively selected from the items, and the drilling energy adjustment unit sets the predetermined offset amount so as to set the predetermined energy. So that the offset adjustment means,
Each of the pressing force adjusting means is controlled so as to set the predetermined pressing force.

According to a fifth technical configuration, in the printing apparatus according to the seventh aspect, plate making means provided with a plurality of heating elements for making a plate on a master, and perforation energy supplied to each heating element of the plate making means. Perforating energy adjusting means for adjusting the pressure to a predetermined energy, ink supply means for supplying ink to the inner peripheral surface of the plate cylinder, pressing means for pressing a sheet against the outer peripheral surface of the plate cylinder, Offset adjusting means for adjusting the offset amount generated when the ink supply means is displaced in the rotation direction of the plate cylinder to a predetermined offset amount, wherein the printing condition is determined by the perforation energy and the offset amount. The control means selects the predetermined energy and the predetermined offset amount from the printing conditions, and sets the predetermined energy The drilling energy adjusting means to set the, and controlling each said offset adjusting means to set the predetermined offset amount.

According to a sixth technical configuration, in the printing apparatus according to the seventh aspect, plate making means provided with a plurality of heating elements for making a plate on a master, and perforation energy supplied to each heating element of the plate making means. Energy adjusting means for adjusting the pressure to a predetermined energy, pressing means for pressing the sheet against the plate cylinder, and pressing force adjusting means for adjusting the pressing force of the pressing means against the plate cylinder to a predetermined pressing force. The printing conditions are the perforation energy and the pressing force, and the control unit selects the predetermined energy and the predetermined pressing force from the printing conditions, respectively, and sets the predetermined energy. The drilling energy adjusting means is controlled so as to be set, and the pressing force adjusting means is controlled so as to set the predetermined pressing force.

According to a seventh technical configuration, in the printing apparatus according to the seventh aspect, ink supply means for supplying ink to the inner peripheral surface of the plate cylinder, pressing means for pressing a sheet against the outer peripheral surface of the plate cylinder, An offset adjusting means for adjusting an offset generated when the ink supply means is deviated in the rotational direction of the plate cylinder with respect to the pressing means to a predetermined offset amount; and a pressing force of the pressing means against the plate cylinder being predetermined. And a pressing force adjusting unit for adjusting the pressing force to the pressing force, wherein the printing conditions are the offset amount and the pressing force, and the control unit determines the predetermined offset amount and the predetermined The pressing force is selected, the offset adjusting means is set to set the predetermined offset amount, and the pressing force adjusting means is set to set the predetermined pressing force. Characterized in that it is controlled.

According to an eighth technical configuration, in the printing apparatus according to the seventh aspect, plate making means provided with a plurality of heating elements for making a plate on a master, and perforation energy supplied to each heating element of the plate making means. Perforating energy adjusting means for adjusting the pressure to a predetermined energy, ink supplying means for supplying ink to the inner peripheral surface of the plate cylinder, pressing means for pressing a sheet against the outer peripheral surface of the plate cylinder, Offset adjusting means for adjusting the offset amount generated when the ink supply means is displaced in the rotation direction of the plate cylinder to a predetermined offset amount, and adjusting the pressing force of the pressing means against the plate cylinder to a predetermined pressing force. Pressing force adjusting means, the printing conditions are the perforation energy, the offset amount and the pressing force, the control means,
The predetermined energy, the predetermined offset amount, and the predetermined pressing force are respectively selected from the printing conditions, and the perforation energy adjusting means is set to the predetermined offset amount so as to set the predetermined energy. The offset adjusting means is controlled so as to set the pressing force, and the pressing force adjusting means is controlled so as to set the predetermined pressing force.

Here, as a specific example of the energy adjusting means for perforation in the printing apparatus and the like according to the third and eighth aspects, for example, a microcomputer or a microprocessor also serving as a control means can be used. The microcomputer and the microprocessor are electrically connected to the thermal head via a thermal head drive board provided with an output port, a thermal head drive circuit and the like.

As a specific example of the paper type setting means in the printing apparatus according to the seventh aspect, for example, a paper type setting for manually setting and inputting a desired type of printing paper provided on an operation panel of the printing apparatus is provided. Key. (See FIGS. 4 and 9).

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention including embodiments (hereinafter, referred to as "embodiments") will be described below with reference to the drawings. Throughout the embodiments and the like, components (members, components, and the like) having the same function, shape, and the like are denoted by the same reference numerals, and description thereof is omitted as much as possible. 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. As an example of this, a conveying roller pair 12 of the plate making device 70 and a registration roller pair 20 of the sheet feeding device 90 shown in FIG. In addition, in order to simplify the drawings and the description, even if they are components to be illustrated in the drawings, components that do not need to be specifically described in the drawings may be appropriately omitted without omission. (Embodiment 1) Hereinafter, a first embodiment of the present invention (hereinafter, referred to as a first embodiment)
"Embodiment 1") will be described. FIG. 1 shows the overall configuration of a stencil printing apparatus 100 as an example of a printing apparatus to which Embodiment 1 of the present invention has been applied. First, the overall configuration will be described.

The stencil printing apparatus 100 has a printing drum cylinder 80 on which a printing master is wound and a printing cylinder printing press 80 having a press roller as a pressing means for pressing the paper 39 against the printing master on the printing cylinder 1. And the plate cylinder printing pressure device 80
A plate-making device for transferring the master 8 toward the plate cylinder 1, and a plate-making device 70 for transferring the master 8 toward the plate cylinder 1. An ink supply device 18 that supplies ink from the peripheral side, a paper feed device 90 that feeds the paper 39 between the plate cylinder 1 and the press roller 21, and the like are provided.

The plate making device 70 is provided with a master supporting member 8c as a master storing means for storing the master 8 so as to be able to be fed out in the master conveying direction X1, and disposed downstream of the master supporting member 8c in the master conveying direction X1. The thermal head 11 serves as plate making means for heating and making a master 8 in accordance with image information, and the master 8 is moved and conveyed to the downstream side in the master conveying direction X1 while being pressed against the thermal head 11. A rotatable platen roller 10 and a master transport direction X1 adjacent to the platen roller 10
, A pair of upper and lower rotatable transport rollers 12 for transporting the master 8 downstream of the platen roller 10 in the master transport direction X1 than the platen roller 10, and a master transport direction X1 , A pair of rotatable upper and lower reversing rollers 14 for transporting the master 8 toward the clamper 7 of the plate cylinder 1, and a pair of transport rollers 1.
The master 8 which has been provided in the master transport path between the master 2 and the pair of reversing rollers 14
And a cutter 13 for cutting the sheet into a predetermined length.

The master 8 has a continuous sheet shape, and is wound around a roll core 8b made of synthetic resin to form a master roll 8a.
Is formed. The roll core 8b protrudes from both end surfaces of the master roll 8a and is formed to be longer than the width of the master 8. In the master roll 8a, the roll cores 8b on both ends are rotatably supported in a counterclockwise direction by a master support member 8c, and are detachable from the master support member 8c. Roll cores 8b at both ends of master roll 8a
A brake rubber (not shown) for applying a back tension to the master 8 fed from the master roll 8a to such an extent that the master roll 8a does not rotate due to vibration or the like is provided so as to be able to contact the roll cores 8b at both ends. The master supporting member 8c is moved in the master conveying direction X in the plate making device 70.
It is attached to a pair of plate making side plates (not shown) arranged on both left and right sides along the line 1. Therefore, Master 8
Are stored so as to be fed out from the master roll 8a in the master transport direction X1 by the master support member 8c. The master 8 is a known material in which a support of Japanese paper or synthetic fiber is attached to a thermoplastic resin film having a thickness of, for example, 1 to 3 μm. As the master 8, a master or the like substantially composed of only a thermoplastic resin film is used.

The platen roller 10 is formed integrally with a platen roller shaft via a metal core. It is covered with a silicone rubber layer having good strain and conductivity. Platen roller 10
Is rotatable clockwise because both ends of the platen roller shaft are rotatably supported by the plate making side plate pair. The platen roller 10 is rotated via a rotation transmitting member (not shown) such as a timing belt and a gear.
It is connected to a stepping motor (not shown) as platen roller driving means, and is rotated clockwise by this. As described above, by driving the platen roller 10 to rotate clockwise by the stepping motor, the master 8 is pulled out from the master roll 8a while receiving the back tension by the brake rubber.

The thermal head 11 is a platen roller 1
The platen roller 10 extends in parallel with the platen roller shaft 0 and is freely movable toward and away from the platen roller 10 via the master 8 by a contacting / separating mechanism including a cam, a spring member, and the like (not shown). The thermal head 11 is urged by the spring member in a direction in which the thermal head 11 comes into contact with the platen roller 10. Master transport direction X1 in thermal head 11
A large number of heating elements 11a are arranged at a position where the heating element 11a abuts on the platen roller 10 via the master 8 in the main scanning direction orthogonal to the above. The thermal head 11 selectively heats each heating element 11a based on a digital image signal processed and transmitted by an A / D converter and a plate making control device (both not shown) of a document reading device (not shown). With this, the master 8 is selectively heated and melt-punched / plate-formed.

The upper transport roller 12 is rotated by the stepping motor at a peripheral speed (transport speed) slightly higher than the peripheral speed (transport speed) of the platen roller 10. The transport roller pair 12 slides between the master 8 and the platen roller 1 via the stepping motor.
An appropriate front tension is applied to the master 8 between the transport roller pair 12 and the transport roller pair 12. The upper transport roller 12 is connected to the stepping motor via a rotation transmission member (not shown) such as a plurality of gears, and is thereby driven to rotate clockwise. A drive system around the platen roller 10 and the conveyance roller pair 12 via the above-described stepping motor employs, for example, the same mechanism as the rotation transmission mechanism shown in FIG. Has adopted.

The outer peripheral portion of the transport roller pair 12 is made of silicone rubber, and is formed integrally with a metal shaft. The transport roller pair 12 is provided with an appropriate pressing force applied by an urging means such as a spring to be in pressure contact with each other. They are rotatable in opposite directions.

The cutter 13 is provided with a guillotine type cutter 13 having a fixed blade 13b and a movable blade 13a. The cutter 13 is not limited to the guillotine type,
A rotary blade moving type in which the movable blade moves while rotating in the master width direction orthogonal to the master transport direction X1 is also used.

The upper reversing roller 14 is connected to the stepping motor via a plurality of gears or a rotation transmitting member (not shown) such as a belt, and is driven to rotate clockwise. The reversing roller pair 14 is set to rotate at a peripheral speed (transport speed) slightly higher than the peripheral speed (transport speed) of the platen roller 10 by the rotation transmitting member including the stepping motor. A suitable front tension is applied to the master 8 while sliding between the master 8 and the vehicle. At the shaft end of the upper reversing roller 14, there is provided an electromagnetic clutch (not shown) for connecting and disconnecting the rotational driving force of the stepping motor to the upper reversing roller 14. This electromagnetic clutch
For example, it comprises a powder type electromagnetic clutch or a hysteresis type electromagnetic clutch. Note that, instead of the electromagnetic clutch, a single stepping motor independent of the stepping motor 35 may be driven.

Master transport direction X adjacent to the reversing roller pair 14
The master 8 or master 8 that has been made
A guide plate 15 for guiding the leading end of the pair of rollers to the clamper 7 of the plate cylinder 1 is provided to extend in each axial direction of the pair of reversing rollers 14.

The plate cylinder 1 is composed of a porous cylindrical support cylinder and a mesh screen (not shown) made of a resin or metal mesh wound around a plurality of layers so as to cover the outer periphery of the support cylinder. It has a two-layer structure. The plate cylinder 1 has a well-known configuration including an opening 1a (printable area) having a large number of ink-permeable openings and a non-opening (non-printable area) provided with a clamper 7 and the like. Have. Plate cylinder 1
Is wound around and fixed to the outer peripheral portion of an end plate flange (not shown), and is rotatably supported around a support shaft also serving as an ink pipe 5 described later. The plate cylinder 1 is rotated in a direction indicated by an arrow (clockwise) in the figure by transmitting the rotational driving force of the electric motor by a drive transmitting means such as a gear or a belt connected to an electric motor (not shown).

The ink supply device 18 is arranged in parallel with a small gap with the ink roller 2 as an ink supply means for supplying ink by contacting the inner peripheral surface of the plate cylinder 1 with ink. It is mainly composed of a doctor roller 3 that forms a wedge-shaped ink reservoir 4 with the roller 2, and an ink pipe 5 that supplies ink to the ink reservoir 4.

Each end of the ink roller 2 and the doctor roller 3 is provided with a pair of ink side plates 17a, 17a,
17b rotatably supported via a bearing (not shown). The ink roller 2 rotates in the arrow direction (clockwise direction) in the figure in synchronization with the plate cylinder 1 by transmitting the rotational driving force of the electric motor through a drive transmission unit such as a gear or a belt (not shown). Driven. The ink in the ink reservoir 4 is sucked by an ink pump (not shown) or the like provided outside the plate cylinder 1 by an ink pump (not shown) and supplied from a supply hole of an ink pipe 5. Ink side plate pair 17
a, 17b are the rotation directions of the plate cylinder 1 via a bearing (not shown) around the ink pipe 5 (FIG.
(Clockwise and counterclockwise directions). 1 and 2, when describing the arrangement position and the like of the components, the left side (the front side of the paper of FIG. 1) or the right side (the back side of the paper of FIG. 1) when viewed in the paper transport direction X.
There is a time.

Inside the plate cylinder 1, an offset amount XA generated when the ink roller 2 is biased in the rotation direction of the plate cylinder 1 (the counterclockwise direction in FIG. 1 in the first embodiment) with respect to the press roller 21. Offset adjustment means 65 for adjusting the offset amount to a predetermined offset amount XA. The offset adjusting means 65 includes a worm wheel 67 having a partial fan shape formed at the upper end of the ink side plate 17a, a worm 66 meshing with the worm wheel 67, a moving motor 16 having the worm 66 on an output shaft, Side plate 1
Shield plate 1 integrally formed at a position near the upper end of 7a
7c, the offset home sensor 19 for detecting the initial position of the offset amount by detecting the home position of the ink side plate 17a, and the ink side plate 1 by detecting the rotation amount of the moving motor 16.
7A for detecting the displacement amount 7a, ie, the offset amount XA.
It is mainly composed of

The moving motor 16 is composed of, for example, a stepping motor, and is fixedly attached to a stationary member fixed to the ink pipe 5. Similarly, the offset home sensor 19 is fixedly attached to the immovable member. An offset amount detection sensor 19A (not shown in FIG. 1) is provided on an output shaft of the moving motor 16, and is provided so as to sandwich a photo encoder having a slit disk (not shown) having a large number of slits. Photo sensor. Offset amount detection sensor 19A
Detects the amount of rotation of the moving motor 16, that is, the number of rotations of the worm 66, by detecting a change in a pulse generated by the cooperation of the photo encoder and the transmission type photo sensor when the moving motor 16 is rotationally driven. Then, the offset amount is indirectly detected. In the case of the first embodiment, the offset amount control is always performed.
Offset home sensor 19 of offset adjusting means 65
From the home position of the photo encoder detected by the above.

On a part of the outer peripheral surface of the non-opening portion of the plate cylinder 1, a ferromagnetic stage 6 provided along one generatrix of the plate cylinder 1, and provided on both side ends of the stage 6. And a clamper 7 having a rubber magnet that is rotatably mounted on the clamper shaft and that can be opened and closed with respect to the plane portion of the stage 6. The clamper 7 is opened and closed at a predetermined position of the plate cylinder 1 by an opening / closing device (not shown).
The plate cylinder 1 is adapted to be stopped at a plate feeding position where the clamper 7 is located substantially on the right side as shown in FIG. Plate cylinder 1
Is configured as a plate cylinder unit integrally formed with the ink pack and the like, and is removably inserted into and removable from the main body frame (not shown) of the stencil printing apparatus 100 in the axial direction of the ink pipe 5.

As shown in FIGS. 1 and 2, the press roller 21 is disposed near the lower portion of the outer peripheral surface of the plate cylinder 1 facing the ink roller 2. The press roller 21 can be vertically displaced by a press roller displacing means 55 to be described later between a printing pressure position pressed against the outer peripheral surface of the plate cylinder 1 and a non-printing position separated from the printing pressure position. 1 and a pressing force adjusting means 50 described later for changing the pressing force PA of the press roller 21 against the plate cylinder 1 (hereinafter sometimes referred to as "printing pressure PA"). Thus, the pressing force PA is varied.

The press roller 21 has an inner peripheral portion formed of a core metal and an outer peripheral portion formed of an elastic body such as rubber, and is provided so as to extend in parallel with the axial direction of the plate cylinder 1. Both ends of the core have a well-known structure in which roller shafts 21a are integrally formed.

The pressing force adjusting means 50 and the press roller displacing means 55 are described in, for example,
It has the same configuration and function as those shown in FIG. The press roller displacing means 55 is configured to selectively displace the press roller 21 between a printing pressure position for pressing the outer peripheral surface of the plate cylinder 1 and a non-printing position separated from the printing pressure position.
Has functions.

The press roller displacing means 55 is provided to extend substantially parallel to the left and right roller shafts 21a, and both ends thereof are supported by a pair of left and right main body side plates 54 so as to be rotatable by a predetermined angle. The free end of which can swing about a horizontal axis 22A and the roller shaft 21 of the press roller 21
a pair of left and right arms 22a and 22b rotatably supported at both ends of the horizontal shaft 22a and rotatably supported at their base ends by a predetermined angle near both ends of the horizontal shaft 22A, the press roller 21, and the horizontal shaft 22A. And an intermediate connecting stay 22B which is inserted into the arm pair 22a and 22b at a substantially central portion to connect the arm pair 22a and 22b to each other, and whose base end is fixed to the central portion of the horizontal shaft 22A and whose free end is connected to the intermediate connecting stay. The central portion of the horizontal shaft 22A is held at a predetermined angle by the intermediate connecting stay 22B.
Having a cam follower 30A whose base end is integrally attached to the end of the horizontal shaft 22A of the left main body side plate 54 and whose free end swings around the horizontal shaft 22A. A mounting arm 30 and a printing pressure spring 29 whose one end is locked to the free end of the spring mounting arm 30 and urges the spring mounting arm 30 to swing in a direction to press the press roller 21 against the outer peripheral surface of the plate cylinder 1. (Tension coil spring)
And the cam 27 rotatably supported by the left main body side plate 54 with the cam shaft 27a and selectively engaging with the cam follower 30A of the spring mounting arm 30.

As described above, since the slight gap is provided between the intermediate connecting stay 22B and the vertical operating arm 22C, the left-right balance of the press roller 21 when the printing pressure is applied can be adjusted. It is a possible mechanism. The intermediate connecting stay 22B is made of a metal having a hollow rectangular cross section. The intermediate connecting stay 22B is
After being inserted through the arm pairs 22a and 22b, the arm pair 22
A not-shown retaining pin is driven into a portion close to the outer wall surface of each of a and 22b, whereby the left and right sides in the paper width direction are prevented from falling off. The cam 27 is rotatably supported by a left main body side plate 54 with a cam shaft 27a. The spring mounting arm 30 has a triangular plate shape, and a cam follower 30
A is selectively engaged through A. The vertical operating arm 22C and the horizontal shaft 22A are integrally fixed by press-fitting a fixing pin (not shown).

Around the press roller 21, for example, FIG. 1 of Japanese Patent Application Laid-Open No.
Press roller driving means (not shown) similar to that shown in FIG. The press roller driving means includes a main motor for rotating the plate cylinder 1, and swings and displaces the press roller 21 between the printing pressure position and the non-printing position in synchronization with the rotation of the plate cylinder 1. It has a known configuration for causing The press roller 21 is held at a non-printing pressure position separated from the outer peripheral surface of the plate cylinder 1 by a locking means (not shown) except when the sheet is passed.

The pressing force adjusting means 50 is provided on the left main body side plate 5.
4 is fixed via a member (not shown) and
Arm 23 is attached, and printing pressure control that can rotate forward and reverse
The other end of the motor 25 and the printing pressure spring 29 are locked.
And a groove formed in the left main body side plate 54 (shown in FIG.
Only) in the front-back direction of the paper transport direction X
Movable shaft with a female screw formed on its inner periphery
31 and a male screw screwed into the female screw of the movable shaft 31
A rotatable rotating shaft 28 formed on the outer periphery of the
A wobble that is fixed to the rotation shaft 28 and always meshes with the worm 23
Arm 24 and one end of a rotating shaft 28,
Encoder for detecting the rotation speed of the worm wheel 24
(Not shown) at a predetermined position on the main body side plate 54 on the left side.
Supported at a predetermined interval
And the movable shaft 3
1, a shielding plate 31a protruding from the outer peripheral portion,
It is supported at a predetermined position of the main body side plate 54 via a member (not shown).
And sandwich the shielding plate 31a at a predetermined interval.
Home position of encoder 33A (standard printing pressure)
Photo sensor 32 for detecting the position indicating the state)
Mainly composed.

The encoder 33A is a well-known photo encoder having a slit disk having a number of slits (not shown), and the encoder 33A and the pressing force detection sensor 33 cooperate to form the worm wheel 24. The pressing force PA can be indirectly detected by detecting the number of rotations, that is, the amount of advance and retreat of the movable shaft 31 before and after the sheet conveyance direction X, in other words, the amount of displacement of the tension length of the printing pressure spring 29. .

Since the press roller displacement means 55 and the pressing force adjusting means 50 are configured as described above,
Both ends of the printing pressure spring 29 are displaceably locked by the free end of the spring mounting arm 30 and the movable shaft 31. Therefore, the printing pressure control motor 25
The rotation amount of the printing pressure control motor 25 is changed from the worm 23 to the worm wheel 24 by the forward or reverse rotation drive of
Is further converted by the screw mechanism into a linear motion of the movable shaft 31 in the forward or backward direction of the paper transport direction X, whereby the movable shaft 31 is moved in the forward or backward direction of the paper transport direction X, As a result, the tension length of the printing pressure spring 29 is changed, and the tension of the printing pressure spring 29 is changed, so that the pressing force (printing pressure) PA of the press roller 21 against the plate cylinder 1 is changed. In the case of the first embodiment, the above-described printing pressure control is always performed.
The operation is started from the home position of the encoder 33A of the pressing force adjusting means 50.

The paper feeding device 90 includes a paper feeding tray 37, which is also referred to as a paper feeding tray on which the paper 39 is loaded and which can be raised and lowered, and a paper feeding roller which comes into contact with the paper 39 on the paper feeding tray 37 and feeds the paper 39 in the paper transport direction X. 35, a separation pad 36 serving as a separation member that separates and feeds the paper 39 one by one by the cooperation of the paper feed roller 35, and a front end of the cow 39 loaded on the paper feed tray 37. The paper feed front plate 36A and the separated and fed paper 39 are taken at a predetermined timing,
A pair of upper and lower registration rollers 20 and 20 for transporting between the outer peripheral surface of the paper and the press roller 21 and a paper transport path near the paper feed roller 35 are provided. And a paper type detecting sensor 40 as a paper type detecting means for detecting the paper type.

The paper feed tray 37 is provided, for example, in JP-A-7-14
A vertical movement mechanism (not shown) similar to the vertical movement mechanism 42 shown in FIG. 7 of Japanese Patent No. 4402 is provided, and the paper feed tray 37 is raised and lowered in a horizontal state by the operation of the vertical movement mechanism. The paper feed roller 35 is rotatably driven via a pulley or a belt by a paper feed motor (not shown) including a stepping motor as a paper feed drive unit provided independently of, for example, a plate cylinder drive system. . The registration roller pair 20 is disposed independently of, for example, a plate cylinder drive system, and pulleys and belts are driven by a registration motor including a stepping motor (not shown) as a registration drive unit separate from the sheet feeding drive unit. Is driven to rotate. Incidentally, the paper feed driving means and the registration driving means are not limited to those comprising the above-described stepping motors, but may be those using a cam or gear for transmitting the driving force of the main motor of the plate cylinder driving system. used.

A pair of left and right side fences (not shown) are provided on the upper surface of the paper feed tray 37 so as to be movable in a paper width direction orthogonal to the paper conveyance direction X. The pair of side fences has a left-right interlocking structure, and is used by an operator to position the paper 37 in accordance with the size of the paper 37 in accordance with both end surfaces of the paper 37. As shown in FIG. 1, a paper size detection mechanism for detecting the size of the paper 37 is provided inside the paper feed tray 37. The paper size detection mechanism is provided on an immovable member (not shown) of the paper feed tray 37 and has two paper size detection sensors 38 for detecting the length of the paper 39 stacked on the paper feed tray 37 in the paper transport direction X. , 38, and a paper size width detection sensor (not shown) provided on the stationary member for detecting the length of the paper in the paper width direction in conjunction with the movement of the pair of side fences in the paper width direction. The size of the paper 39 is detected from combination data of the two paper size detection sensors 38 and 38 and the paper size width detection sensor. As the details of such a paper size detection method, the one disclosed by the applicant of the present invention, for example, disclosed in Japanese Patent Application Laid-Open No. 9-30714 or the like is used. As shown in FIG. 1, a paper presence / absence detection sensor 34 composed of a reflection type photosensor for detecting the presence / absence of paper 39 is provided on the immovable member of the paper feed tray 37.

More specifically, the paper type detection sensor 40 is provided above the uppermost paper 39 near the paper feed roller 35 in a state where the uppermost paper 39 on the paper feed tray 37 occupies the paper feeding position. In the vicinity, it is arranged together with a member for regulating the upper surface of the uppermost sheet 39 from jumping during conveyance or the like (refers to a member projecting below the sheet type detection sensor 40 shown in a rectangular shape). Here, the state in which the paper 39 occupies the paper feed position means that the drive motor (not shown) of the above-mentioned vertical movement mechanism operates to raise the paper feed tray 37,
The uppermost sheet 39 is in contact with the paper feed roller 35 and faces a position where paper can be fed.

As shown in detail in FIG. 5, the paper type detection sensor 40 includes a light emitting section 40 a having a light emitting element 40 aa as a light emitting means for projecting light on the surface of the paper 39.
And a light receiving section 40b having a plurality of light receiving elements 40ba as light receiving means for receiving the reflected light reflected on the surface of the paper 39. The light emitting section 40a and the light receiving section 4
0b corresponds to the paper 39 moving by being conveyed.
The paper type is detected by recognizing the variation in the light receiving position of the reflected light received by the plurality of light receiving elements 40ba of the light receiving unit 40b. The light emitting element 40aa is composed of an LED, and the light receiving elements 40ba are composed of, for example, 39 photodiodes. The light emitting unit 40a and the light receiving unit 40b constituting the paper type detection sensor 40 are separated from a paper feed side plate arranged on the paper feed device 90 side in the main body frame as shown in FIG.
Is attached and fixed to a detection plate 40A protruding toward the near side of the paper surface of FIG. Light emitting section 40a (light emitting element 40aa)
Is provided to the control means 41 shown in FIG. 3 through a light emitting diode drive circuit and an output port (not shown),
The (plurality of light receiving elements 40ba) is connected to a control unit 41 via a photodiode drive circuit and an input port (not shown).
Are electrically connected to each other. Note that the plurality of light receiving elements 40ba are not limited to photodiodes, and may be configured by a plurality of phototransistors.

The light emitting portion 40a and the light receiving portion 40b constituting the paper type detection sensor 40 are connected to a paper 39 (paper 3 in FIG. 5).
9A, 39B) The light-emitting element 40aa and the light-receiving element 40ba positioned at the center of the 39 light-receiving elements 40ba at the position facing the surface are the paper 39 (the papers 39A and 39A in FIG. 5).
39B) are arranged substantially plane-symmetrically with respect to a vertical plane perpendicular to the sheet transport direction X of FIG.

In the first embodiment, the light-emitting unit 4 emits light to the paper 39 moving in the paper transport direction X at a constant transport speed va.
0a emits light 20 times at equal intervals, that is, the distance from the paper surface to 20 points as a measurement point is measured. If the sheet surface is extremely smooth, the light receiving section 40 of the reflected light 40c received 20 times by the light receiving section 40b
The variation in the light receiving position at b is small, and the distribution is a substantially normal distribution such as 40c 'shown by the solid line. Conversely, if the paper 39B has large and rough paper surface irregularities,
Due to the surface roughness of the paper 39B, the dispersion of the light receiving positions of the 20 times of reflected light 40d received by the light receiving unit 40b at the light receiving unit 40b becomes large, and the distribution thereof is indicated by a broken line 40d '.
And a relatively low mountain-shaped distribution such as

As described above, the unevenness of the light receiving position in the light receiving section 40b increases as the surface of the paper becomes rougher. The state of the surface of the sheet is recognized by counting the number of light receptions indicating how many times the reflected light from the light emitting element 40aa is received, and the control means 41 shown in FIG. The paper type is determined in five steps up to "".

Each of the sheets 39A, 39A shown in FIG.
39B is exaggerated as if it were positioned vertically, but this is due to the illustration for comparing the light reflection state, and each paper 39A, 39B
Are not located one above the other. Each paper 39A, 39B
In order to more accurately compare the difference in the surface state (the degree of smoothness and the degree of unevenness) of each of the papers 39A and 39B on the paper transport path between the paper feed roller 35 and the upper registration roller 20, It is desirable to provide a pair of upper and lower paper guide plates provided with slits in the incident and reflected areas of the light that regulates the light into a planar state (to prevent a wavy state). On the paper transport path between the paper feed roller 35 and the upper registration roller 20, it is normal to form a deflection at the leading end of the paper 39 as described later. In a paper feeder having a layout in which there is a sufficient space in the paper transport path between the registration rollers 20, even if the paper feed path is arranged in the paper transport path between the paper feed rollers 35 and the upper registration rollers 20. Good.

In the example shown in FIG. 5, the paper type detection sensor 40 is fixed to the paper supply side plate and the paper 39 is moved. By moving the paper type detection sensor 40 to the upstream side or the downstream side of the paper 39 in the paper transport direction X, the paper type based on the difference in the surface state of the paper 39 may be determined. That is, the light emitting unit 40a and the light receiving unit 40b of the paper type detection sensor 40
It is only necessary to be configured so as to move relative to 9.

The paper type detecting means for automatically detecting the paper type due to the difference in the surface condition of the paper 39 is not limited to the above-described paper type detection sensor 40, but is disclosed in, for example, JP-A-7-172.
635 and FIG. 1 and paragraph numbers (0007), (0014) to (0019), and the like. As described, sensor means for detecting the surface roughness of the paper (surface roughness detection means)
May be used to identify the paper type.

On the left side of the plate cylinder 1, there is provided a known plate discharging device for separating the used master on the plate cylinder 1 and discharging the plate. Below the plate discharging device, a peeling claw (not shown) for peeling the sheet from the master having been made on the plate cylinder 1 and capable of coming close to the outer peripheral surface of the plate cylinder 1 is provided. There is provided a paper discharge device including a paper discharge tray (not shown) for stacking the discharged printed paper.

A scanner device having an image sensor such as a CCD (Charge Coupled Device) for reading an image of a document, and a document presence detection sensor for detecting the presence of a document are provided above the plate cylinder 1 and the plate making device 70. And a document reading device (not shown) having a document size detection sensor for detecting the size of the document, and the like. The scanner device reads an image of a document automatically conveyed by an automatic document feeder (ADF) not shown,
It is possible to read an image of an original placed on a contact glass (not shown) without passing through F. The document reading apparatus is disclosed in, for example, Japanese Patent No. 2756.
No. 219 (Japanese Unexamined Patent Publication No. 6-320851).
It has a configuration similar to that shown in FIG.

The detailed configuration of the operation panel 42 will be described with reference to FIG. The operation panel 42 is for giving an instruction to operate the stencil printing apparatus 100 and obtaining information or the like when operating the stencil printing apparatus 100, and is disposed above the document reading apparatus. On the operation panel 42, a paper type input setting key 44 as a paper type setting means for manually setting a paper type according to a difference in the surface state of the paper 39.
And a paper type input / set by the paper type input setting key 44 or a paper type detection sensor 4 shown in FIG.
0, a liquid crystal display unit 43 having a function of displaying the paper type automatically detected at 0, and a paper type input setting key 44.
A paper type indicator 45 for illuminating and displaying the set paper type or the paper type automatically detected by the paper type detection sensor 40, and a paper type manual setting mode using the paper type input setting key 44. A mode switching key 46 and the like as mode switching means for switching to a paper type automatic detection mode automatically detected by the type detection sensor 40 are arranged.

The paper type indicator 45 is composed of a lamp composed of five LEDs (light emitting diodes). On the paper type indicator 45, from left to right, the LEDs described as “coarse”, the LEDs corresponding to “slightly coarse”, and the LEDs described as “standard” as “slightly fine” The corresponding LEDs are arranged so that the LEDs described as “fine” can be turned on and displayed. The paper type input key 44 allows the user to input and set five types of paper. One of the five types of paper shown on the paper type indicator 45 and the liquid crystal display 43 is provided. 4, a paper type selection left shift key 44a for shifting to the left side and selecting a paper type in FIG. 4, and a paper type selection right shift key 44b for shifting to the right side and selecting the paper type in FIG. Consists of two keys.

The paper type display section 43a of the liquid crystal display section 43 includes
To display the paper type depending on the surface condition,
From the left, "coarse", "standard", and "fine" are arranged so that black-and-white inversion can be displayed. Between "coarse" and "standard", ".""." Corresponding to "slightly fine" is arranged between "and" fine "so that black-and-white inverted display is possible.

When the mode switch key 46 is pressed once, "auto" of the paper type display section 43 of the liquid crystal display section 43 is displayed in black and white inverted to indicate that the mode has been switched to the automatic paper type detection mode. Thus, each time the button is pressed, the mode is switched to the paper type automatic detection mode or the paper type manual setting mode. As described above, the liquid crystal display unit 43 has a paper type display unit 43a, and also displays an operation state, various messages, and the like. The liquid crystal display section 43 is driven and controlled via a liquid crystal drive circuit and the like, and the five LEDs of the paper type display 45 are driven and controlled via a diode drive circuit and the like.

The operation panel 42 is provided as an operation starting means for starting a series of steps (operations) from reading of an image of a document to plate discharging, plate making, plate feeding, plate printing, and sheet discharging. Stencil making start key (not shown), a numeric keypad (not shown) for setting / inputting the number of prints, etc., and printing for starting the printing operation for the number of prints set (input / input) by the numeric keys A start key (not shown) and the like are arranged on the right side of the operation panel 42, which is omitted in FIG.

In the first embodiment, there are five types of paper types that can be input and set by the paper type input setting key 44 or that can be automatically detected by the paper type detection sensor 40 as described above. However, this is merely an example of the embodiment, and the present invention is not limited to this. For example, six or more types or less than five types of paper types may be appropriately input / set, or may be automatically detected. Needless to say.

Next, referring to FIG.
Will be described. In FIG. 3, reference numeral 41 denotes the stencil printing apparatus 100 mainly for setting and detecting the paper type, the perforation energy supplied to each heating element 11 a of the thermal head 11 as printing conditions, the offset amount described above, 3 shows control means for performing control relating to pressure PA. The control means 41 includes a CPU (not shown).
(Central processing unit), I / O (input / output) port, RO
M (read-only storage device), RAM (read-write storage device), timer, etc., and a microcomputer having a configuration in which they are connected by a signal bus.

The CPU of the control means 41 (hereinafter, may be simply referred to as “control means 41” for simplicity of description) is connected to the paper constituting the operation panel 42 through the input port. The paper type selection left shift key 44a and the paper type selection right shift key 44b of the type input setting key 44, the mode switching key 46, the offset home sensor 19, the offset amount detection sensor 19A, and the paper type detection sensor 4
0 (accurately, the light receiving section 40b), the home position sensor 32, and the pressing force detection sensor 33 are electrically connected to each other, and receive on / off signals and data signals from these keys and sensors. . The control means 41
Although not shown in FIG. 3 through the input port, is electrically connected to the paper presence / absence detection sensor 34 and the paper size detection sensor 38, and outputs ON / OFF signals and data from these sensors. Receive the signal.

The control means 41 includes, via the output port, a liquid crystal display 43 and a paper type indicator 45 constituting the operation panel 42, the thermal head drive board 9, the printing pressure control motor 25, and the moving motor 16 Although not shown in FIG. 3, it is electrically connected to the light emitting unit 40a of the paper type detection sensor 40, and sends various command signals via various drive circuits to the liquid crystal display unit 43 and the paper type display. 45, the thermal head drive board 9, the printing pressure control motor 25, the moving motor 16, and the light emitting unit 40a of the paper type detection sensor 40.

In the first embodiment, the control means 41 has the following various control functions. First, when a power switch (not shown) provided in the stencil printing apparatus 100 is turned on, the control unit 41 transmits a command signal to emit light to the light emitting unit 40a of the paper type detection sensor 40, and transmits a predetermined signal. A function of causing a light emitting operation to be performed, determining a paper type based on an output signal relating to paper type detection from the light receiving unit 40b, and automatically selecting and setting a printing condition stored in advance according to the paper type. Having.

Secondly, the control means 41 selects a predetermined energy, a predetermined offset amount XA, and a predetermined pressing force PA from the printing conditions in the first function, and sets the predetermined energy. Is set, the moving motor 16 of the offset adjusting means 65 is set to set the predetermined offset amount XA, and the pressing force adjusting means 50 is set to set the predetermined pressing force PA. It has a function of controlling each of the printing pressure control motors 25.

Third, when the control means 41 receives the signal relating to the paper type manual setting mode from the mode switching key 46, the control means 41 gives priority to the control operation by the first and second functions described above, Based on a signal from the paper type selection left shift key 44a or the paper type selection right shift key 44b of the paper type input setting key 44, a printing condition stored in advance according to the paper type is automatically selected and set. Has functions.

The ROM in the control means 41 stores the C information of the control means 41 having the above-described first to third functions.
A data table (see Table 1 below) relating to the setting of the optimal printing conditions (master perforation diameter setting, offset amount setting, printing pressure setting) according to the paper type, obtained in advance through experiments and the like, for performing control by the PU. ) And programs for performing the operations described later are stored in advance. Control means 41
RAM temporarily stores the judgment results and calculation results of the CPU, and stores the output signals from each sensor and various keys as needed to input and output these signals.

[0082]

[Table 1]

Here, the energy adjusting means for drilling and the control thereof will be described with reference to Table 1 above. This energy adjusting means for drilling is disclosed in, for example, Japanese Patent No. 2756.
This is the same as the basic technical matters described in Japanese Patent Application Laid-Open No. 219 (Japanese Patent Application Laid-Open No. 6-320851). That is,
In the stencil printing apparatus including the stencil printing apparatus 100 of the first embodiment, the print image density is determined by the amount of ink oozing from the perforated portion of the master 8. The amount of ink that oozes from the perforated portion of the master 8 is proportional to the area of each minute perforation that forms the perforation pattern formed on the master 8.

Therefore, the surface smoothness of the paper 39 is poor, for example, the paper 39 having a poor surface smoothness as shown in FIG.
In the case where B is used, the ink is fixed only to the raised portions of the fibers, and the ink is not transferred and applied uniformly on the paper 38B, resulting in a print image with poor solid filling, or the paper 39 Is excellent in ink permeability, and when the paper 39 is used such that the ink penetrates into the paper 39 before the diffusion and filling of the ink on the surface of the paper 39,
Increasing the size of individual perforations that form the perforation pattern compensates for the reduction of solid fill due to poor surface smoothness of the paper 39 and reduces the decrease in print image density due to excellent ink permeability. By supplementing, a high quality and good print image can be obtained.

Conversely, when the paper 39A having a good surface smoothness as shown in FIG. 5 is used, for example, a printed image with good solid filling is obtained, In the case of using paper 39 such as coated paper with fine fibers on the surface of 39, by relatively reducing individual perforations, the amount of bleeding of ink is suppressed, and a high quality and good printed image is obtained. Can be obtained.

In other words, the size of each perforation (master perforation diameter) of the perforation pattern for obtaining a desired optimum print image density is determined according to the type of paper, while the size of each perforation is determined by the thermal size. Since it is determined by the perforation energy supplied to the heating elements 11a corresponding to the heating temperatures of the individual heating elements 11a of the head 11, there is a correspondence between the paper type and the perforation energy for obtaining the optimum print image density. , This correspondence can be determined experimentally.

According to the technical matters shown in FIG. 3 and the like of Japanese Patent No. 2756224, the drilling pattern formed on the master 8 by the drilling energy supplied to the individual heating elements 11a of the thermal head 11. The size of the perforation (master perforation diameter) as one unit can be controlled. This situation is the same whether the heat generating element is a rectangular type or a heat concentrated type. Adjustment of drilling energy is described in patent 2756
As described in Japanese Patent Publication No. 219, this may be performed by changing the value of a current flowing through each heating element 11a of the thermal head 11 or a voltage value applied to the heating element 11a in accordance with an image signal. In the first embodiment, the control is performed by changing the width of an energizing pulse supplied to the heating element 11a of the thermal head 11 via the thermal head drive board 9.

In the first embodiment, the control means 41 adjusts the drilling energy supplied to the individual heating elements 11a of the thermal head 11 to a predetermined energy (hereinafter sometimes referred to as “punching energy”). It also has a function as energy adjustment means. More specifically, when the control unit 41 receives a signal relating to the paper type manual setting mode from the mode switching key 46, the control unit 41 outputs an output signal relating to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. Instead of taking in, priority is given to this based on the output signal relating to the paper type setting from the paper type selection left shift key 44a or the paper type selection right shift key 44b of the paper type input setting key 44, or from the mode switching key 46. When the signal relating to the paper type automatic detection mode is received, based on the output signal relating to the paper type detection from the light receiving portion 40b of the paper type detection sensor 40, the table 1 stored in advance according to the paper type is used. Out of the drilling energy (here, the energizing pulse width) of the data table relating to the printing condition setting shown in FIG. Select the energizing pulse width of the perforation energy (for simplicity of description for Table 1, are distinguished by large, medium and small, etc.)
In accordance with an image signal, power is supplied from a power supply (not shown) and the energizing pulse width is set to
The thermal head drive board 9 is controlled so as to be supplied to one heating element 11a to generate heat.

The above-mentioned ROM has the following details.
"Program for energy adjustment for drilling" and Table 1
As shown in the figure, “Relationship between paper type, predetermined punching energy, predetermined offset amount XA, and predetermined pressing force PA related to setting of optimum printing conditions for obtaining an optimum print image according to the paper type. Is predetermined and stored as a data table.

From the technical items described above, in Table 1, the energizing pulse as the perforation energy is applied to the paper 39 having a poor surface smoothness included in the “rough” paper type and the paper 39 having excellent ink permeability. By increasing the width of each of the perforations forming the perforation pattern by increasing the width to “large”, the energizing pulse width is set to “medium to large” for the paper 39 belonging to “slightly coarse” as the paper type. Medium-to-large perforation diameter for "standard"
For the paper 39 belonging to the paper type 39, the energizing pulse width is set to “medium” and the diameter of the individual holes is set to be medium. By setting the perforation diameter to small to medium by setting "small to medium", paper 3 belonging to "fine"
For No. 9, a high quality and good printed image can be obtained by making the energization pulse width “small” and making the diameter of each perforation small.

Next, control of the offset adjusting means 65 will be described. In the stencil printing apparatus including the stencil printing apparatus 100, the print image density is determined by the amount of ink oozing from the perforated portion of the master 8. Is inversely proportional to the offset amount XA. If the offset amount XA is small, the ink ejection amount that oozes from the perforated portion of the master 8 increases, and conversely, if the offset amount XA increases, the ink ejection amount decreases.

Therefore, in a case where the paper 39B having poor surface smoothness as shown in FIG. 5 is used, for example, the ink is not transferred and applied uniformly on the paper 38B, and the printed image becomes poor in solid filling. If the paper 39 is excellent in ink permeability and the paper 39 is used such that the ink permeates into the paper 39 before the ink is diffused and filled on the surface of the paper 39, the offset amount By reducing XA and increasing the ink ejection amount, paper 39
It is possible to obtain a high quality and good print image by compensating for the reduction of solid filling caused by poor surface smoothness of the ink or by compensating for the decrease in print image density caused by excellent ink permeability. it can.

Conversely, when the paper 39A having good surface smoothness as shown in FIG. 5 is used, for example, a printed image with good solid filling or a poor ink permeability, for example, paper When using paper 39 such as coated paper with fine fibers on the surface of 39, obtain a high quality and good printed image by relatively controlling the ink ejection amount by increasing the offset amount XA. Can be.

In other words, since the offset amount XA for obtaining the desired optimum print image density is determined according to the paper type, the correspondence between the paper type and the offset amount XA for obtaining the optimal print image density is Exists, and this correspondence can be determined experimentally.

More specifically, the control means 41 comprises:
When a signal relating to the paper type manual setting mode from the mode switching key 46 is received, an output signal relating to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40 is not taken in, and is given priority over this. Paper type selection left shift key 44a or paper type selection right shift key 44b of type input setting key 44
Paper type detection sensor 40 based on an output signal relating to the paper type setting from the printer, or when a signal relating to the paper type automatic detection mode from the mode switching key 46 is received.
Based on the output signal of the paper type detection from the light receiving unit 40b, the appropriate offset amount XA is selected from the data table related to the print condition setting shown in Table 1 stored in advance according to the paper type. (Represented in mm in Table 1), and the moving motor 16 of the offset adjusting means 65 is controlled so as to set the predetermined offset amount XA.

From the technical matters described above, in Table 1, the offset amount XA is set to “0” for the paper 39 having a poor surface smoothness included in “rough” as the paper type and the paper 39 having excellent ink permeability. ≦ XA <2.0 mm ”to increase the ink ejection amount, the offset amount XA for the paper 39 belonging to“ slightly coarse ”as the paper type.
Is set to “2.0 ≦ XA <2.5 mm”, and for the paper 39 belonging to the “standard” as the paper type, the offset amount XA is set to “XA = 2.5 mm”. For the paper 39 belonging to “slightly fine”, the offset amount XA is set to “2.5 <XA ≦ 3.0”.
mm, the offset amount XA is set to “3. mm” for the paper 39 belonging to “fine” as the paper type.
By setting 0 <XA <6.0 mm, it is possible to obtain high quality and good print images.

Next, control of the pressing force adjusting means 50 will be described. In the stencil printing apparatus including the stencil printing apparatus 100, the print image density is determined by the amount of ink oozing from the perforated portion of the master 8, and the amount of ink oozing from the perforated portion of the master 8 is determined by the press roller 21 with respect to the plate cylinder 1.
Is proportional to the pressing force PA (printing pressure PA). Pressing force PA
Is larger, the amount of ink ejected from the perforated portion of the master 8 increases, and conversely, if the pressing force PA is smaller, the amount of ink ejected decreases. Therefore, for example, in the case where the paper 39B having poor surface smoothness as shown in FIG. 5 is used, the ink is not uniformly transferred and applied onto the paper 38B, resulting in a printed image with poor solid filling. ,
When the paper 39 is excellent in ink permeability and the paper 39 is used such that the ink permeates into the paper 39 before the ink is diffused and filled on the surface of the paper 39, the pressing force PA is increased. By increasing the ink ejection amount,
A high quality and good print image is obtained by compensating for a reduction in solid filling caused by poor surface smoothness of the paper 39 and a decrease in print image density due to excellent ink permeability. be able to.

Conversely, when the paper 39A having good surface smoothness as shown in FIG. 5 is used, for example, a printed image with good solid filling is obtained, In the case of using paper 39 such as coated paper with fine fibers on the surface of 39, obtaining a high quality and good printed image by reducing the pressing force PA and relatively suppressing the ink discharge amount Can be.

In other words, since the pressing force PA for obtaining a desired optimum print image density is determined according to the paper type, the correspondence between the paper type and the pressing force PA for obtaining the optimum print image density is determined. Exists, and this correspondence can be determined experimentally.

More specifically, the control means 41 comprises:
When a signal relating to the paper type manual setting mode from the mode switching key 46 is received, an output signal relating to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40 is not taken in, and is given priority over this. Paper type selection left shift key 44a or paper type selection right shift key 44b of type input setting key 44
Paper type detection sensor 40 based on an output signal relating to the paper type setting from the printer, or when a signal relating to the paper type automatic detection mode from the mode switching key 46 is received.
Based on the output signal for detecting the paper type from the light receiving unit 40b, the appropriate pressing force PA is selected from the data table for the printing condition setting shown in Table 1 stored in advance according to the paper type. (In Table 1, it is expressed in N units)
Is selected, and the printing pressure control motor 25 of the pressing force adjusting means 50 is controlled so as to set the predetermined pressing force PA.

From the technical matters described above, in Table 1, the pressing force PA is set to “159” for the paper 39 having a poor surface smoothness included in “rough” as the paper type and the paper 39 having excellent ink permeability. By increasing the ink ejection amount by setting <PA <200N>, the pressing force PA is set to “14” for the paper 39 belonging to “slightly coarse” as the paper type.
8 <PA ≦ 159N ”, the pressing force PA is set to“ PA = 148N ”for the paper 39 belonging to the“ standard ”as the paper type, and the paper belonging to the“ slightly fine ”as the paper type is set. For 39, the pressing force P
By setting A to “137 ≦ PA <148N”, the paper 39 belonging to “fine” as the paper type is
By setting the pressing force PA to “100 <PA <137N”, it is possible to obtain a high quality and good print image. (Operation Example 1) Next, Operation Example 1 of Embodiment 1 will be described. First, when the user turns on a power switch (not shown), the operation panel 42 and the control unit 41 are in a state in which they can be activated, and also in a state in which power can be supplied to each device. Before or after the operation of turning on the power switch, if the paper 39 to be used in the current printing is insufficient on the paper feed tray 37, the paper 39 of the paper type to be used in the current printing is In the case where paper 39 other than the paper type to be used in the current printing is loaded or loaded as appropriate on the paper 37, the paper 39 is removed from the paper tray 37 and After the paper 39 of the paper type to be used in the printing is loaded on the paper feed tray 37, for example, a paper feed tray up / down key (not shown) is pressed, and the paper feed tray 37 is pressed.
The uppermost surface of the paper 39 stacked on the upper surface is made to face a position where paper can be fed (paper feed position).

When the power switch is turned on, the liquid crystal display section 43 of the operation panel 42 displays, for example, "Before pressing the plate making start key, first press the mode switching key 46 once or twice to automatically detect the paper type. Please select the mode or paper type manual setting mode. " The user sees the contents of the message displayed on the liquid crystal display unit 43 and performs an operation of selecting the paper type automatic detection mode or the paper type manual setting mode. Here, assuming that the paper type automatic detection mode is set by pressing the mode switching key 46 once, "Auto" of the liquid crystal display section 43 is inverted between black and white to indicate that the paper type automatic detection mode is set.
Notify. An operation example according to the paper type automatic detection mode is operation example 1.

At the same time that the paper type automatic detection mode is set, the paper type detection operation by the paper type detection sensor 40 is performed. First, the paper feed roller 35 is rotated by operating a paper feed motor (not shown).
The uppermost sheet 39 on the paper feed tray 37 is the separation pad 3
6, and the sheet is separated and fed toward the registration roller pair 20. At this time, with respect to the paper 39 moving in the paper transport direction X at a constant transport speed va,
When the light emitting unit 40a emits light 20 times at regular intervals, that is, the distance from the paper surface to 20 points is measured as a measurement point, and each light receiving element 40ba in the light receiving unit 40b generates reflected light from the light emitting element 40aa. The state of the sheet surface is recognized by counting the number of light receptions indicating that the sheet has been received, and an output signal relating to the sheet type is transmitted to the control means 41. The control means 41 is based on an output signal relating to the paper type from the light receiving section 40b of the paper type detection sensor 40,
The surface condition of the paper 39 is set to 5 from “rough” to “fine”.
The determination is made in stages, the paper type is determined, and the determination result of the paper type is displayed on the paper type display section 4 of the liquid crystal display section 43.
One of “coarse” to “fine” in column 3a is displayed in black and white inverted.

The leading end of the paper 39 conveyed by the paper feed roller 35 is abutted against a position immediately before the nip portion of the pair of registration rollers 20, and a predetermined deflection is formed at the leading end of the paper 39. The motor stops its operation. As a result, the leading end of the paper 39 is temporarily held in a state where the deflection is formed.

Next, before or after the operation of depressing the mode switching key 46, the user places a document (not shown) having an image to be printed on a document table (not shown) arranged above the document reading apparatus. (Not shown), and after the mode switching key 46 is pressed, the plate making start key is pressed. When the plate making start key is depressed, the plate making start signal generated thereby is input to the control means 41, so that the plate discharging step is executed first. In this state, the plate cylinder 1
, The used master used in the previous printing remains attached to the outer peripheral surface.

The plate cylinder 1 rotates counterclockwise, and the used master on the outer peripheral surface of the plate cylinder 1 is peeled off by a plate discharge device (not shown) and discharged to a plate discharge box (not shown). When the used master is completely separated from the outer peripheral surface of the plate cylinder 1, the plate discharging process is completed. Next, the plate cylinder 1 is stopped at a plate feeding position where the clamper 7 is located substantially to the right in FIG.

In parallel with the plate discharging process, the document reading device reads an image of a document (not shown). That is, the document placed on the document placing table is subjected to the same image reading operation as described in paragraph No. (0016) of Japanese Patent No. 2756219 (Japanese Patent Laid-Open No. 6-320851). The document from which the image has been read is discharged onto a document tray (not shown). The electric signal photoelectrically converted by the image sensor is input to an analog / digital (A / D) conversion board (not shown) in the apparatus main body and is converted into a digital image signal.

On the other hand, in parallel with this image reading operation,
A plate making and plate feeding process is performed based on the digitalized image information. That is, when the stepping motor for rotating the platen roller 10 is driven, the platen roller 10, the conveying roller pair 12, and the reversing roller pair 14 start rotating, and the master transport is performed while the master 8 is pulled out from the master roll 8a. It is transported downstream in the direction X1. For the master 8 conveyed in this manner, a plurality of minute heating elements 11a arranged in a line on the thermal head 11 are respectively selected according to the digital image signal sent from the A / D conversion board. Fever
The thermoplastic resin film portion of the master 8 that is in contact with the heat-generating element 11a is melt-punched. in this way,
The image information is written as a punching pattern by the position-selective fusion punching of the master 8 according to the image information.

In the plate making process described above, the control means 4
1 selects and sets an energizing pulse width capable of forming a perforated hole of an appropriate size from the data table relating to the sheet feeding condition setting of Table 1 described above according to the determined sheet type. The thermal head drive board 9 is controlled to supply the optimal energizing pulse width to the heating element 11a to generate heat.

On the other hand, inside the plate cylinder 1 in the plate feeding standby state, the offset adjusting means 65 is controlled. That is, the control means 41 selects an appropriate offset amount XA from the data table of Table 1 in accordance with the discriminated paper type, and moves the motor of the offset adjusting means 65 so as to set the predetermined offset amount XA. 16 will be controlled.

At the same time, the pressing force adjusting means 50 is controlled. That is, the control unit 41 selects an appropriate pressing force PA from the data table of Table 1 according to the determined paper type, and sets the mark of the pressing force adjusting unit 50 so as to set the predetermined pressing force PA. The pressure control motor 25 will be controlled.

Next, when the stepping motor in the plate making device 70 is driven to rotate by a predetermined number of steps, the leading end of the master 8 is guided by the guide plate 15 and inserted between the stage 6 and the clamper 7. Reversing roller pair 14a,
14b is rotated by a predetermined angle, and accordingly, it is determined that the step number of the stepping motor has reached a certain set value, and the leading end of the master 8 having been made has reached between the stage 6 and the clamper 7. Then, the clamper 7 is closed by the opening / closing device, and the leading end of the master 8 having been made is adsorbed and clamped between the stage 6 and the clamper 7.

After the front end of the master 8 having been made is clamped, the plate cylinder 1 is restarted to rotate by the drive of the main motor, and the master 8 which has been made is brought into contact with the platen roller 10, the conveying roller pair 12 and the reversing roller pair 14a. , 14b and fed to the outer peripheral surface of the plate cylinder 1, the plate cylinder 1
At the time of winding on the outer peripheral surface without generating wrinkles. If it is determined that the stepping motor has been rotated by a predetermined number of steps to complete the master making to the master 8 and the transfer of the set amount of the master 8 having been set, the rotation of the stepping motor is stopped, and the platen is stopped. The rotation of the roller 10, the conveying roller pair 12, and the reversing roller pair 14 is stopped, and the movable blade 13a of the cutter 13 is operated to cut the master 8 having been made. The rear end of the cut master 8 having been cut is the plate cylinder 1
Is pulled out of the plate making device 70 by the rotation of
At the stage where the master 8 is completely wound on the outer peripheral surface, the winding of the master 8 having been made on the plate cylinder 1 is completed.

When winding of the master 8 having been made on the plate cylinder 1 is completed, a printing process is started. Registration roller pair 2
The leading end of the sheet 39, which has been abutted and held at a position immediately before the nip portion 0, is timed by the registration roller pair 20, and is conveyed between the outer peripheral surface of the plate cylinder 1 and the press roller 21. When the passage of the paper 39 is detected by a paper detection sensor (not shown) disposed in the vicinity of the registration roller pair 20 downstream in the paper conveyance direction X, the locking means is released, and the press roller 21 is pressed. Due to the urging force of the plate 29, the paper 39 is continuously pressed by the master 8 (not shown in FIG. 1), which has been wound around the outer circumference of the plate cylinder 1, and the master 8 which has been made is pressed. So-called plate printing for bringing the cylinder 1 into close contact with the outer peripheral surface is performed. In this printing, the ink oozes out from the perforated portion of the plate cylinder 1 to the perforated portion of the stencil master 8 and is transferred to the surface of the paper 39 to form a print image. At this time, the ink roller 2 also rotates in the same direction as the rotation direction of the plate cylinder 1 and in synchronization with the rotation speed of the plate cylinder.
The ink in the ink reservoir 4 is attached to the surface of the ink roller 2 by the rotation of the ink roller 2, and the amount thereof is regulated when passing through the gap between the ink roller 2 and the doctor roller 3. Supplied to

The leading end of the paper 39 on which the print image is formed is peeled off from the master 8 on the plate cylinder 1 by the peeling claw approaching the outer peripheral surface of the plate cylinder 1. The paper is discharged and stacked on the paper discharge tray. After completion of the printing, the press roller 21 is separated from the plate cylinder 1 and returns to the initial position to be in a printing standby state. After completion of the printing, the user appropriately views the printed matter discharged to the paper discharge tray and determines whether or not to perform a normal printing operation. After setting the number of prints and pressing the print start key, in the same process as above, the paper feed, print and discharge processes are repeated for the set number of prints, and the entire stencil printing process is completed. I do.

For example, when all the paper types of the paper 39 stacked on the paper feed tray 37 are the same,
As in the operation example 1 described above, the paper type may be detected only once by the paper type detection sensor 40 and discriminated by the control means 41 at the time of paper feeding for plate printing, but the following can also be performed. That is, in the operation example 1, the paper type detection sensor 40
Is used, for example, when the paper 39 loaded on the paper feed tray 37 is mixed with a paper 39 having a paper type different from a desired one, not only the plate printing but also the normal printing The paper type detection sensor 40 detects the paper type at the time of each passing of the paper, and when it is detected / determined that the paper 39 different from the desired one has been mixed, a message for warning the user is displayed on the operation panel. The sheet feeding operation may be displayed on the liquid crystal display unit 43 of the display unit 42 or simultaneously with the warning / message. (Operation Example 2) Assuming that the user looks at the message displayed on the liquid crystal display 43 and presses the mode switching key 46 twice to set the paper type manual setting mode, the "auto" of the liquid crystal display 43 is set. The black-and-white inverted display disappears, and for example, the liquid crystal display unit 43 displays “The paper type has been switched to the paper type manual setting mode, and the paper loaded on the paper feed tray 37 with the paper type selection left shift key 44a or paper type selection right shift key 44b Please select the type "is displayed, and the fact that the paper type manual setting mode has been set is displayed and notified.
An operation example relating to the paper type automatic detection mode is operation example 2.

Here, for example, if the user uses “coarse” paper 39 as the paper type to be used in the current printing, and loads and replenishes the paper in the paper feed tray 37, the user selects the paper type selection left shift key 44a. To display the paper type indicator 45
"Rough" LED lamp is lit, and "rough" paper 3
Select and set 9. At the same time that the paper type manual setting mode is set, the paper type detection operation by the paper type detection sensor 40 is performed in the same manner as in the first operation example. Does not take in the output signal relating to the paper type.

Hereinafter, only differences from the operation example 1 will be described. The first difference is that the control means 41
Corresponds to the paper type “coarse” selected and set by the paper type selection left shift key 44 a of the paper type input setting key 44, and from the data table relating to the paper feed condition setting of Table 1 described above,
A thermal head drive board for selecting and setting an energizing pulse width “large” capable of forming a hole of an appropriate size and supplying the optimal energizing pulse width to the individual heating elements 11 a of the thermal head 11 to generate heat. 9 is controlled. The second difference is that the control means 41 selects one of the data types shown in Table 1 from the data table of Table 1 in accordance with the paper type "coarse" selected and set by the paper type selection left shift key 44a of the paper type input setting key 44. The appropriate offset amount XA, “0 ≦ XA
<2.0 mm ”is selected and set, and the moving motor 16 of the offset adjusting means 65 is controlled so as to set the predetermined offset amount XA. The third difference is that the control means 41 selects one of the data types shown in Table 1 from the data table shown in Table 1 in accordance with the paper type "coarse" selected and set by the paper type selection left shift key 44a of the paper type input setting key 44. Appropriate pressing force PA
Is selected and set, and the pressing force adjusting means 5 is set so as to set the predetermined pressing force PA.
0 is to control the printing pressure control motor 25. In addition,
Although the paper type detection sensor 40 is also used in the operation example 2, the present invention is not limited to this. The control unit 41 automatically stops the operation of the paper type detection sensor 40 when the paper type manual setting mode is set. Accordingly, by performing the same control as described above based only on the output signal from the paper type input setting key 44, energy saving can be achieved.

As described above, according to the first embodiment, the paper type is determined by automatically detecting the paper type, manually setting the paper type, or using these together. Optimal printing conditions according to the paper type (master punch diameter setting, offset amount setting, pressing force setting)
Can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained. (Embodiment 2) FIGS. 5 and 7 show the control configuration and operation panel 42 of Embodiment 2. FIG. The second embodiment has a control unit 41A instead of the control unit 41 of the first embodiment as compared with the first embodiment, an operation panel 42A instead of the operation panel 42 of the first embodiment, The main difference is that only the operation relating to the paper type automatic detection mode is performed.

First, immediately after the power switch is turned on and when the uppermost sheet 39 on the sheet tray 37 occupies the sheet feeding position, the controller 41A controls the sheet type detecting sensor 40A. A command signal to emit light is transmitted to the light emitting unit 40a to perform a predetermined light emitting operation, and the paper type is determined based on the output signal relating to the paper type detection from the light receiving unit 40b. It has a function of automatically selecting and setting stored printing conditions.

Secondly, the control means 41A uses the first
Function, a predetermined energizing pulse width, a predetermined offset amount XA and a predetermined pressing force PA are selected from the printing conditions.
Is selected, and the set predetermined energizing pulse width is supplied to the individual heating elements 11a of the thermal head 11 to generate heat, and the thermal head drive substrate 9 is offset-adjusted so as to set the predetermined offset amount XA. It has a function of controlling the moving motor 16 of the means 65 and the printing pressure control motor 25 of the pressing force adjusting means 50 so as to set a predetermined pressing force PA. Specific examples of the printing conditions are similar to the energizing pulse width (perforation energy) shown in Table 1 of the first embodiment, and the numerical values are stored in the ROM of the control unit 41A in advance.

The operation panel 42A is different from the operation panel 42 of the first embodiment in that a paper type selection left shift key 44a and a paper type selection right shift key 4
4b, the mode switching key 46 and the paper type indicator 45 are removed. Therefore, in the second embodiment, only the operation related to the automatic paper type detection mode can be performed.

Next, only the operation of the second embodiment that is different from that of the first embodiment will be described. The operation of the second embodiment is as follows.
Compared to the operation example 1 of the first embodiment, the message displayed on the liquid crystal display unit 43 of the operation panel 42 is not displayed after the power switch is turned on, and the user can automatically detect the paper type or manually set the paper type. The only difference is that there is no need to perform the operation of selecting... Since the operation can be easily performed based on the operation example 1 of the first embodiment, further description is omitted.

As described above, according to the second embodiment, the paper type is determined by automatically detecting the paper type, and the optimum printing conditions (master punching diameter setting, offset amount setting) according to the paper type are determined. , Pressing force setting) can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained. (Third Embodiment) FIG. 8 shows a control configuration of a third embodiment.
The third embodiment is different from the first embodiment in that the paper type detection sensor 40 is eliminated.
Embodiment 1 having a control means 41B instead of the first embodiment
The main difference is that an operation panel 42B is provided instead of the operation panel 42, and only the operation related to the paper type manual setting mode is performed.

First, when the power switch is turned on, the control unit 41B turns off the uppermost sheet 3 on the sheet feed tray 37.
After 9 occupies the paper feeding position, the paper type selection left shift key 44a or the paper type selection right shift key 44b of the paper type input setting key 44
Has a function of automatically selecting and setting a printing condition stored in advance in accordance with the paper type based on an output signal relating to the paper type from the printer.

Secondly, the control means 41B uses the first
In the function (1), a predetermined energy, a predetermined offset amount XA and a predetermined pressing force PA are respectively selected from the above printing conditions, and the set predetermined energizing pulse width is supplied to the individual heating elements 11a of the thermal head 11. The thermal head drive substrate 9 is heated to generate heat, the moving motor 16 of the offset adjusting means 65 is set to set a predetermined offset amount XA, and the pressing force adjusting means 50 is set to set a predetermined pressing force PA. It has a function of controlling each of the pressure control motors 25.

The operation panel 42B has a configuration obtained by removing the mode switching key 46 from the operation panel 42 of the first embodiment. Therefore, in the third embodiment, only the operation related to the paper type manual setting mode can be performed.

Next, the operation of the third embodiment will be described only on the points different from the first embodiment. The operation of the third embodiment is as follows.
Compared to, for example, the operation example 2 of the first embodiment, after the power switch is turned on, the liquid crystal display unit 43 of the operation panel 42 displays, for example, “Before pressing the plate making start key, first,
Select the paper type loaded on the paper feed tray 37 with the paper type selection left shift key 44a or the paper type selection right shift key 44b of the paper type input setting key 44. " The only difference is that the display and notification of the mode setting are mainly different. Since the rest can be easily implemented based on the operation example 2 of the first embodiment, further description is omitted.

As described above, according to the third embodiment, by manually setting the paper type, the optimum printing conditions (master punch diameter setting, offset amount setting, pressing force setting) according to the paper type are set. It can be set automatically, so that the print image density can be properly varied,
High quality print images can be obtained.

As described above, in the first to third embodiments, three printing conditions are set (setting of a predetermined energy for setting a master punching diameter, setting of an offset amount, and setting of a pressing force) for convenience of explanation of the embodiment. However, from the technical matters described in detail in Embodiments 1 to 3, it is apparent that Embodiments 4 to 6 and each of these modifications can be immediately configured with the following simpler configuration. It is. The description of the operation examples of the fourth to sixth embodiments and each of these modifications will be made in comparison with the operation examples 1 and 2 of the above-described first embodiment for easy understanding. (Fourth Embodiment) FIG. 10 shows a control configuration of a fourth embodiment. The fourth embodiment has a control unit 41C instead of the control unit 41 of the first embodiment, an operation panel 42A instead of the operation panel 42 of the first embodiment, as compared with the first embodiment, The main difference is that the offset adjusting unit 65 and the pressing force adjusting unit 50 of the first embodiment are removed, and only the perforating energy adjusting unit is provided, and only the operation related to the paper type automatic detection mode is performed. 2, 3, 6).

When the power supply switch is turned on and the topmost sheet 39 on the paper feed tray 37 occupies the paper feed position immediately after the power switch is turned on, the light emitting section 40a of the paper type detection sensor 40 The light emitting unit 40b transmits a command signal to emit light to perform a predetermined light emitting operation, determines the paper type based on an output signal related to paper type detection from the light receiving unit 40b, and stores in advance according to the paper type. A predetermined energizing pulse width (perforation energy) is selected and set from energizing pulse widths (perforation energy) as printing conditions, and the set predetermined energizing pulse width is supplied to the individual heating elements 11a of the thermal head 11. And has a function of controlling the thermal head drive board 9 so as to generate heat.

The operation of the fourth embodiment is different from the first operation example of the first embodiment in that the message displayed on the liquid crystal display section 43 of the operation panel 42 is not displayed after the power switch is turned on, There is no need to perform an operation of selecting the automatic type detection mode or the paper type manual setting mode, and all the operation descriptions relating to the offset adjustment unit 65 and the pressing force adjustment unit 50 have been deleted from the description of the operation example 1 of the first embodiment. Is mainly different from the first embodiment, and can be easily implemented based on the operation example 1 of the first embodiment. As described above, according to the fourth embodiment, the paper type is determined by automatically detecting the paper type, and a predetermined energy (for example, an energizing pulse as a punching energy) is determined as an optimal printing condition according to the paper type. Width) can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained. (First Modification) The embodiment of the present invention is not limited to the fourth embodiment, but may be the following first modification. Modification 4
Is compared with the control unit 41 of the fourth embodiment.
Control means 41D shown in parentheses in FIG.
Having an operation panel 42B shown in parentheses in FIG. 10 instead of the operation panel 42A of the fourth embodiment, removing the paper type detection sensor 40 from the control components shown in FIG. 10, and The main difference is that only the operation related to the paper type manual setting mode is performed.
reference).

After the power switch is turned on and the uppermost sheet 39 on the sheet tray 37 occupies the sheet feeding position, the controller 41D selects the sheet type selection left shift key 44a of the sheet type input setting key 44. Alternatively, based on an output signal relating to the paper type from the paper type selection right shift key 44b, a predetermined energizing pulse width is selected from among energizing pulse widths (energy for punching) as printing conditions stored in advance according to the paper type. And a function of controlling the thermal head drive board 9 so as to supply the set predetermined energizing pulse width to the individual heating elements 11a of the thermal head 11 to generate heat.

Next, the operation of the first modification will be described only on the points different from the operation of the first embodiment. The operation of Modification Example 1 is different from Operation Example 2 of Embodiment 1, for example, in Operation Example 2.
The main difference is that all the description of the operations relating to the offset adjusting means 65 and the pressing force adjusting means 50 has been deleted from the description of the first embodiment, and the rest can be easily implemented based on the operation example 2 of the first embodiment. Is omitted. As described above, according to the first modification, by manually setting the paper type, a predetermined energy (for example, an energizing pulse width as perforation energy) is automatically set as an optimal printing condition according to the paper type. This makes it possible to set the print image density appropriately, thereby obtaining a high-quality print image. (Modification 2) The embodiment of the present invention is not limited to Embodiment 4, and the following Modification 2 may be used. Modification 4
Is compared with the control unit 41 of the fourth embodiment.
Control means 41E shown in parentheses in FIG.
Having an operation panel 42 shown in parentheses in FIG. 10 in place of the operation panel 42A of the fourth embodiment, and performing an operation related to a paper type automatic detection mode or a paper type manual setting mode. Mainly different.

When the control unit 41E receives a signal relating to the paper type manual setting mode from the mode switching key 46, it does not take in the output signal relating to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. In preference to this, the paper type selection left shift key 44a of the paper type input setting key 44
Alternatively, based on an output signal relating to paper type setting from the paper type selection right shift key 44b, or based on a mode switching key 46b.
When a signal related to the paper type automatic detection mode is received from the printer, the printing stored in advance according to the paper type based on the output signal related to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. A predetermined energizing pulse width is selected and set from among energizing pulse widths (energy for drilling) as conditions, and the set predetermined energizing pulse width is supplied to the individual heating elements 11a of the thermal head 11 to generate heat. It has a function of controlling the thermal head drive board 9.

In the operation of the modified example 2, as compared with, for example, the operation examples 1 and 2 of the first embodiment, the explanation of the operation relating to the offset adjusting means 65 and the pressing force adjusting means 50 is omitted from the description of the operation examples 1 and 2. The only difference is that the above operation is mainly carried out. Since the rest can be easily implemented based on the operation examples 1 and 2 of the first embodiment, further explanation is omitted. As mentioned above,
According to the second modification, by automatically detecting the paper type, manually setting the paper type, or using these together, the predetermined energy (the predetermined energy ( For example, the energizing pulse width (perforation energy) as the perforation energy can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained.

Each of the control means 41C, 41D, 41 described above
In the ROM E, the energizing pulse width (perforation energy) according to the paper type, which is similar to the specific example of the energizing pulse width (perforation energy) in Table 1 in the first embodiment, is stored in advance. In the fourth embodiment and the first and second modified examples, since the ink ejection amount due to the difference in the paper type is corrected only by the perforation energy adjusting means, the tendency is rougher than the energization pulse width (perforation energy) setting example in Table 1. Become. (Fifth Embodiment) FIG. 11 shows a control configuration of a fifth embodiment. The fifth embodiment includes a control unit 41F instead of the control unit 41 of the first embodiment, an operation panel 42A instead of the operation panel 42 of the first embodiment, as compared with the first embodiment, The main difference is that the energy adjustment unit for punching and the pressing force adjustment unit 50 of the first embodiment are eliminated, and only the offset adjustment unit 65 is provided, and only the operation related to the automatic paper type detection mode is performed. , 2, 4, 6).

When the power supply switch is turned on and the topmost sheet 39 on the sheet supply tray 37 occupies the sheet supply position immediately after the power switch is turned on, the light emitting section 40a of the sheet type detection sensor 40 The light emitting unit 40b transmits a command signal to emit light to perform a predetermined light emitting operation, determines the paper type based on an output signal related to paper type detection from the light receiving unit 40b, and stores in advance according to the paper type. It has a function of selecting a predetermined offset amount XA from among the offset amounts XA as printing conditions, and controlling the moving motor 16 of the offset adjusting means 65 so as to set the predetermined offset amount XA.

The operation of the fifth embodiment is different from the first operation example of the first embodiment in that the message displayed on the liquid crystal display section 43 of the operation panel 42 after the power switch is turned on is not displayed, It is not necessary to perform the operation of selecting the automatic seed detection mode or the paper type manual setting mode, and the operation description relating to the energy adjustment unit for punching and the pressing force adjustment unit 50 has been deleted from the description of the operation example 1 of the first embodiment. The only difference is that the present embodiment can be easily implemented based on the operation example 1 of the first embodiment, and further description will be omitted. As described above, according to the fifth embodiment, the paper type is determined by automatically detecting the paper type, and the predetermined offset amount XA is automatically set as the optimal printing condition according to the paper type. As a result, the print image density can be appropriately varied, and a high-quality print image can be obtained. (Modification 3) The embodiment of the present invention is not limited to Embodiment 5, and the following modification 3 may be used. Modification 3
Is compared with the control means 41 of the fifth embodiment.
Control means 41G shown in parentheses in FIG.
Having an operation panel 42B shown in parentheses in FIG. 11 in place of the operation panel 42A of the fifth embodiment, removing the paper type detection sensor 40 from the control components shown in FIG. 11, and The main difference is that only the operation related to the paper type manual setting mode is performed.
reference).

After the power switch is turned on and the uppermost sheet 39 on the sheet tray 37 occupies the sheet feeding position, the controller 41G controls the sheet type input setting key 44 to select the sheet type left shift key 44a. Alternatively, based on an output signal relating to the paper type from the paper type selection right shift key 44b, a predetermined offset amount XA is selected from among offset amounts XA as printing conditions stored in advance according to the paper type, and Offset adjusting means 6 so as to set a predetermined offset amount XA
5 has a function of controlling the moving motor 16.

Next, the operation of the third modification will be described only on points different from the operation of the first embodiment. The operation of Modification 3 is different from Operation Example 2 of Embodiment 1, for example, in Operation Example 2.
The main difference is that all of the description of the operation related to the energy adjusting means for drilling and the pressing force adjusting means 50 has been deleted from the description of the first embodiment, and the rest can be easily implemented based on the operation example 2 of the first embodiment. The above description is omitted. As described above, according to the third modification, by manually setting the paper type, it is possible to automatically set the predetermined offset amount XA as the optimum printing condition according to the paper type. The print image density can be appropriately varied, and a high-quality print image can be obtained. (Modification 4) The embodiment of the present invention is not limited to Embodiment 5, and the following Modification 4 may be used. Modification 4
Is compared with the control means 41 of the fifth embodiment.
Control means 41H shown in parentheses in FIG.
Having an operation panel 42 shown in parentheses in FIG. 11 in place of the operation panel 42A of the fifth embodiment, and performing an operation related to a paper type automatic detection mode or a paper type manual setting mode. Mainly different.

When the signal relating to the paper type manual setting mode is received from the mode switching key 46, the control means 41H does not take in the output signal relating to the paper type detection from the light receiving section 40b of the paper type detection sensor 40. In preference to this, the paper type selection left shift key 44a of the paper type input setting key 44
Alternatively, based on an output signal relating to paper type setting from the paper type selection right shift key 44b, or based on a mode switching key 46b.
When a signal related to the paper type automatic detection mode is received from the printer, the printing stored in advance according to the paper type based on the output signal related to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. It has a function of selecting a predetermined offset amount XA from the offset amount XA as a condition, and controlling the moving motor 16 of the offset adjusting means 65 so as to set the predetermined offset amount XA.

The operation of the fourth modification is different from that of the first embodiment, for example, the first and second operation examples. The only difference is that they ’re removed,
The rest can be easily implemented based on the operation examples 1 and 2 of the first embodiment, and further description will be omitted. As described above, according to the fourth modification, by automatically detecting the paper type, manually setting the paper type, or using these together, the optimum printing condition according to the paper type is obtained. The predetermined offset amount XA can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained.

The control means 41F, 41G, 41 described above
In the ROM of H, the offset amount XA corresponding to the paper type, which is similar to the specific example of the offset amount XA in Table 1 in the first embodiment, is stored in advance.
In the third and fourth modifications, since the ink ejection amount due to the difference in the paper type is corrected only by the offset adjusting means 65, Table 1 is used.
Tend to be coarser than the offset amount XA setting example. (Sixth Embodiment) FIG. 12 shows a control configuration of the sixth embodiment. The sixth embodiment has a control unit 41J instead of the control unit 41 of the first embodiment, an operation panel 42A instead of the operation panel 42 of the first embodiment, as compared with the first embodiment, The main difference is that the energy adjustment unit for perforation and the offset adjustment unit 65 of the first embodiment are eliminated, and only the pressing force adjustment unit 50 is provided, and only the operation related to the automatic paper type detection mode is performed. , 2, 5, 6).

When the power supply switch is turned on and the uppermost sheet 39 on the paper feed tray 37 occupies the paper feed position immediately after the power switch is turned on, the light emitting section 40a of the paper type detection sensor 40 The light emitting unit 40b transmits a command signal to emit light to perform a predetermined light emitting operation, determines the paper type based on an output signal related to paper type detection from the light receiving unit 40b, and stores in advance according to the paper type. It has a function of selecting a predetermined pressing force PA from among the pressing forces PA as printing conditions, and controlling the printing pressure control motor 25 of the pressing force adjusting means 50 so as to set the predetermined pressing force PA.

The operation of the sixth embodiment is different from the first operation example of the first embodiment in that the message displayed on the liquid crystal display section 43 of the operation panel 42 is not displayed after the power switch is turned on, There is no need to perform the operation of selecting the automatic seed detection mode or the manual paper type setting mode, and the operation description relating to the energy adjustment unit for punching and the offset adjustment unit 65 has been deleted from the description of the operation example 1 of the first embodiment. Is mainly different from the first embodiment, and can be easily implemented based on the operation example 1 of the first embodiment. As described above, according to the sixth embodiment, by automatically detecting the paper type,
The type of paper is determined, and a predetermined pressing force PA can be automatically set as the optimal printing condition according to the type of paper, whereby the print image density can be appropriately varied, and high quality A printed image can be obtained. (Modification 5) The embodiment of the present invention is not limited to Embodiment 6, and the following Modification 5 may be used. Modification 5
Is compared with the control means 41 of the sixth embodiment.
12. Control means 41K shown in parentheses in FIG.
Having an operation panel 42B shown in parentheses in FIG. 12 instead of the operation panel 42A of the sixth embodiment, removing the paper type detection sensor 40 from the control components shown in FIG. 12, and The main difference is that only the operation relating to the paper type manual setting mode is performed.
0).

After the power switch is turned on and the paper 39 on the uppermost surface on the paper feed tray 37 occupies the paper feed position, the control means 41K presses the paper type selection left shift key 44a of the paper type input setting key 44. Alternatively, based on an output signal relating to the paper type from the paper type selection right shift key 44b, a predetermined pressing force PA is selected from among the pressing forces PA stored in advance as printing conditions in accordance with the paper type. The printing pressure control motor 25 of the pressing force adjusting means 50 is set to set a predetermined pressing force PA.
Has the function of controlling

Next, the operation of the fifth modification will be described only on the points different from the operation of the first embodiment. The operation of Modification Example 5 is different from Operation Example 2 of Embodiment 1 in Operation Example 2, for example.
The main difference is that all the explanations of the operations relating to the energy adjusting means for drilling and the offset adjusting means 65 have been deleted from the description of the first embodiment, and the rest can be easily implemented based on the operation example 2 of the first embodiment. Is omitted. As described above, according to the fifth modification, by manually setting the paper type, it is possible to automatically set the predetermined pressing force PA as the optimum printing condition according to the paper type. The print image density can be appropriately varied, and a high-quality print image can be obtained. (Modification 6) The embodiment of the present invention is not limited to Embodiment 6, and the following Modification 6 may be used. Modification 6
Is compared with the control means 41 of the sixth embodiment.
12. Control means 41L shown in parentheses in FIG.
And having an operation panel 42 shown in parentheses in FIG. 12 in place of the operation panel 42A of the sixth embodiment, and performing an operation related to the paper type automatic detection mode or the paper type manual setting mode. Mainly different.

When the control unit 41L receives the signal relating to the paper type manual setting mode from the mode switching key 46, it does not take in the output signal relating to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. In preference to this, the paper type selection left shift key 44a of the paper type input setting key 44
Alternatively, based on an output signal relating to paper type setting from the paper type selection right shift key 44b, or based on a mode switching key 46b.
When a signal related to the paper type automatic detection mode is received from the printer, the printing stored in advance according to the paper type based on the output signal related to the paper type detection from the light receiving unit 40b of the paper type detection sensor 40. A predetermined pressing force PA is selected from the pressing force PA as a condition, and the predetermined pressing force P is selected.
It has a function of controlling the printing pressure control motor 25 of the pressing force adjusting means 50 so as to set A.

The operation of the modification 6 is different from the operation example 1 and the operation example 1 of the first embodiment in that the description of the operation of the drilling energy adjusting means and the offset adjusting means 65 is omitted from the description of the operation examples 1 and 2. The only difference is that the above operation is mainly carried out. Since the rest can be easily implemented based on the operation examples 1 and 2 of the first embodiment, further explanation is omitted. As described above, according to the modified example 6, by automatically detecting the paper type, manually setting the paper type, or using these together, the optimum printing condition according to the paper type is obtained. The predetermined pressing force PA can be automatically set, whereby the print image density can be appropriately varied, and a high-quality print image can be obtained.

Each of the control means 41J, 41K, 41 described above
In the ROM of L, the pressing force PA of Table 1 in the first embodiment is stored.
Although the pressing force PA corresponding to the paper type, which is similar to the specific example of FIG.
In No. 6, since the ink ejection amount due to the difference in the type of paper is corrected only by the pressing force adjusting means 50, the printing force tends to be rougher than the pressing force PA setting example in Table 1.

From the above, it can be said that the present invention is not limited to the above-described first to sixth embodiments and each of the first to sixth modifications, but may have the following configuration examples. That is, a combination of any two of the perforating energy adjusting means, the offset adjusting means 65, and the pressing force adjusting means 50, and the combination of the paper type detection sensor 40 and / or the operation panels 42, 42A, 42B. A configuration having a configuration and control means corresponding to the configuration may be used (first, second, and second configurations described in Means for Solving the Problems).
3, 5, 6, 7).

Further, there is provided an energy adjusting means for drilling,
In order to set an appropriate master perforation diameter, a predetermined energy (for example, energizing pulse width) is selected and set from among perforating energies (for example, energizing pulse width) as printing conditions, and
When controlling the thermal head drive board 9 to supply the set predetermined energy (for example, energizing pulse width) to the individual heating elements 11a of the thermal head 11 to generate heat, a more appropriate master hole diameter is set. Therefore, it can be controlled finely. That is, the print image density is generally or empirically determined to be a certain degree of the amount of ink transferred to the paper 39 even if the appropriate master perforation diameter is set according to the paper type as described above. For example, the characteristic values of the image density-related factors affecting the density of the printed image density (ink viscosity, ink temperature, thermal head 1)
(Temperature 1 and the type of ink in the printing drum) varies depending on the degree and type of the ink. Therefore, it is conceivable to control the temperature more precisely taking this into consideration. As the characteristic values (parameters) of the image density-related factors, in addition to the above,
For example, in a printing apparatus that can use a plurality of types of masters, the type of the master, the temperature inside the apparatus main body, the humidity inside the apparatus main body, the leaving time of the printing apparatus, the printing speed, and the like may be mentioned. it can. Any of these controls taking into account the characteristic values of the image density-related factors can be easily implemented based on the technology proposed by the applicant of the present application, and therefore, further description will be omitted.

As described above, the present invention has been described with respect to the specific embodiments and the like including the examples. However, the present invention is not limited to the above-described embodiments and the like, and is configured by appropriately combining the above-described embodiments. It is obvious to those skilled in the art that various embodiments and examples can be configured according to the necessity and use of the present invention within the scope of the present invention.

[0155]

As described above, according to the present invention, it is possible to provide a novel printing apparatus by solving the above-mentioned problems of the conventional apparatus. The effects of each claim are as follows. According to the first aspect of the present invention, control for automatically selecting and setting a printing condition stored in advance in accordance with a type of paper based on a signal from a paper type detecting unit for detecting the type of paper. Means, it is possible to automatically detect the type of paper and automatically set the optimal printing conditions according to the type of paper. The print image density can be appropriately varied, and a high-quality print image can be obtained.

According to the second aspect of the present invention, the paper type detecting means automatically detects the difference in the surface state of the paper, and thereby the roughness of the various papers, especially the surface roughness of the paper and the ink permeability of the paper. The effect of the invention described in claim 1 is exhibited according to the difference.

According to the third aspect of the present invention, the control means selects a predetermined energy from among the energies for piercing as the printing conditions, and controls the energy adjusting means for piercing so as to set the predetermined energy. By controlling, the size of the perforations formed in the master can be adjusted for each type of paper, so that the amount of ink ejected from the perforated portion of the master can be controlled according to the type of paper. The effect of the invention described in claim 1 or 2 is achieved.

According to the fourth aspect of the present invention, the control means selects a predetermined offset amount from the offset amounts as printing conditions and controls the offset adjusting means so as to set the predetermined offset amount. 3. The method according to claim 1, wherein the predetermined amount of offset can be adjusted for each type of paper, so that the amount of ink ejected from the inner peripheral surface of the plate cylinder can be controlled according to the type of paper. The effect of the invention of the invention is exhibited.

According to the fifth aspect of the present invention, the control means selects a predetermined pressing force from the pressing forces as printing conditions, and controls the pressing force adjusting means to set the predetermined pressing force. By controlling, it is possible to adjust to a predetermined pressing force for each type of paper, it is possible to control the amount of ink ejected from the opening portion of the plate cylinder and the perforated portion of the master according to the type of paper, The effects of the invention described in claim 1 or 2 are achieved.

According to the sixth aspect of the present invention, the paper type detecting means has a light emitting means for projecting light on the surface of the paper, and a light receiving means for receiving the reflected light reflected on the surface of the paper,
Both of these means move relative to the paper and detect the type of the paper by recognizing the variation in the light receiving position of the reflected light received by the light receiving means.
In addition to the effects of the invention described in any one of (5) to (5), it is possible to reliably detect the type of sheet due to the difference in the surface state of the sheet.

According to the seventh aspect of the present invention, the printing conditions stored in advance in accordance with the type of paper based on the signal from the paper type setting means for setting the type of paper according to the difference in the surface state of the paper. Control means for selecting and setting an automatic station to automatically set a paper type according to a difference in the surface state of the paper and automatically determine an optimal printing condition according to the paper type. Because it can be set, it is possible to appropriately change the print image density in response to differences in the roughness of the paper surface and differences in the ink permeability of the paper, especially for a wide variety of papers, and obtain high-quality print images. be able to.

According to the eighth aspect of the present invention, the control means selects a predetermined energy from among the piercing energies as printing conditions, and controls the puncturing energy adjusting means so as to set the predetermined energy. By controlling, the size of the perforations formed in the master can be adjusted for each type of paper, so that the amount of ink ejected from the perforated portion of the master can be controlled according to the type of paper. Thus, the effects of the invention described in claim 7 are exhibited.

According to the ninth aspect of the present invention, the control means selects a predetermined offset amount from the offset amounts as printing conditions and controls the offset adjusting means so as to set the predetermined offset amount. By doing so, the predetermined offset amount can be adjusted for each type of paper, so that the amount of ink ejected from the inner peripheral surface of the plate cylinder can be controlled according to the type of paper. Has the effect of

According to the tenth aspect of the present invention, the control means selects a predetermined pressing force from the pressing forces as printing conditions, and controls the pressing force adjusting means so as to set the predetermined pressing force. By controlling, it is possible to adjust to a predetermined pressing force for each type of paper, it is possible to control the amount of ink ejected from the opening portion of the plate cylinder and the perforated portion of the master according to the type of paper, The effects of the invention described in claim 7 are exhibited.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a main part of a stencil printing machine showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration around a pressing force adjusting means provided in FIG. 1;

FIG. 3 is a block diagram illustrating a control configuration according to the first embodiment.

FIG. 4 is a plan view of a main part of the operation panel according to the first embodiment.

FIG. 5 is an explanatory diagram showing a configuration and an operation of a paper type detection sensor provided in FIG. 1;

FIG. 6 is a block diagram illustrating a control configuration according to a second embodiment.

FIG. 7 is a plan view of a main part of an operation panel according to a second embodiment.

FIG. 8 is a block diagram illustrating a control configuration according to a third embodiment.

FIG. 9 is a plan view of a main part of an operation panel according to a third embodiment.

FIG. 10 is a block diagram illustrating a control configuration according to a fourth embodiment and the like.

FIG. 11 is a block diagram illustrating a control configuration according to a fifth embodiment and the like.

FIG. 12 is a block diagram illustrating a control configuration according to a sixth embodiment and the like.

[Explanation of symbols]

Reference Signs List 1 plate cylinder 2 ink roller as ink supply means 8 master 9 thermal head drive substrate 11 thermal head 11a as plate making means 21 heating element 21 press roller as pressing means 39 paper 40 paper type detection sensor 40a as paper type detection means 40a light emission Light emitting unit 40b as means Light receiving unit 40c, 40d as light receiving means Reflected light 41, 41A to 41L Control means 42, 42A, 42B Operation panel 44 Paper type input setting key 44a as paper type setting means Paper type input setting key 44a Paper type selection left shift key 44b Paper type selection right shift key which configures the paper type input setting key 46 Mode switching key 50 Pressing force adjusting means 62 Printing paper 65 Offset adjusting means

Claims (10)

[Claims] 1. A printing apparatus for winding a master made on a plate cylinder around a plate cylinder, supplying ink to the master on the plate cylinder, and pressing a sheet against the master on the plate cylinder to perform printing. And a control means for automatically selecting and setting a printing condition stored in advance in accordance with the type of paper based on a signal from the paper type detecting means. Characteristic printing device. 2. A printing apparatus according to claim 1, wherein said paper type detecting means automatically detects a difference in the surface state of the paper. 3. A printing apparatus according to claim 1, wherein a plate making means provided with a plurality of heating elements for making a plate on a master, and a perforating energy supplied to each heating element of said plate making means is supplied by a predetermined amount. Perforation energy adjustment means for adjusting to energy, wherein the printing condition is the perforation energy, and the control means selects the predetermined energy from the printing conditions, and selects the predetermined energy. A printing energy control unit that controls the perforation energy adjusting unit so as to set the printing energy. 4. A printing apparatus according to claim 1, wherein said ink supply means supplies ink to an inner peripheral surface of said plate cylinder, and a pressing means presses a sheet against an outer peripheral surface of said plate cylinder.
Offset adjusting means for adjusting the offset amount generated when the ink supply means is deviated in the rotation direction of the plate cylinder with respect to the pressing means to a predetermined offset amount, wherein the printing condition is the offset amount The printing apparatus, wherein the control unit selects the predetermined offset amount from the printing conditions and controls the offset adjusting unit to set the predetermined offset amount. 5. A printing apparatus according to claim 1, wherein said pressing means presses a sheet against said plate cylinder, and pressing force adjusting means for adjusting a pressing force of said pressing means against said plate cylinder to a predetermined pressing force. Wherein the printing condition is the pressing force, and the control means selects the predetermined pressing force from the printing conditions and adjusts the pressing force so as to set the predetermined pressing force. A printing apparatus characterized by controlling means. 6. A printing apparatus according to claim 1, wherein said paper type detecting means includes a light emitting means for projecting light on the surface of the paper, and a light reflected on the surface of the paper. Receiving means for detecting the type of paper by moving relative to the paper and recognizing the variation in the light receiving position of the reflected light received by the light receiving means. A printing device, comprising: 7. A printing apparatus for winding a master made on a plate cylinder around an outer peripheral surface of a plate cylinder, supplying ink to the master on the plate cylinder, and pressing a sheet on the master on the plate cylinder to perform printing. Paper type setting means for setting the paper type according to the difference in the surface state of the paper; and automatically selecting a printing condition stored in advance according to the paper type based on a signal from the paper type setting means. And a control means for setting. 8. A printing apparatus according to claim 7, wherein a plate making means having a plurality of heating elements for making a plate on a master, and a perforating energy supplied to each heating element of said plate making means to a predetermined energy. Perforation energy adjusting means for adjusting, wherein the printing condition is the perforation energy, and the control means selects the predetermined energy from the printing conditions and sets the predetermined energy. A printing apparatus for controlling the perforating energy adjusting means so as to perform the perforating operation. 9. A printing apparatus according to claim 7, wherein said ink supply means supplies ink to an inner peripheral surface of said plate cylinder, and a pressing means presses a sheet against the outer peripheral surface of said plate cylinder.
Offset adjusting means for adjusting the offset amount generated when the ink supply means is deviated in the rotation direction of the plate cylinder with respect to the pressing means to a predetermined offset amount, wherein the printing condition is the offset amount The printing apparatus, wherein the control unit selects the predetermined offset amount from the printing conditions and controls the offset adjusting unit to set the predetermined offset amount. 10. A printing apparatus according to claim 7, further comprising pressing means for pressing a sheet against said plate cylinder, and pressing force adjusting means for adjusting a pressing force of said pressing means against said plate cylinder to a predetermined pressing force. The printing condition is the pressing force, and the control means selects the predetermined pressing force from the printing conditions, and controls the pressing force adjusting means to set the predetermined pressing force. A printing device characterized by controlling.