JP2841175B2 - Ink supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for a printing press, and more particularly, to a so-called keyless method which does not require adjustment of an ink supply amount, that is, the thickness of ink is constantly reduced by using a measuring roller. The present invention relates to an ink supply device capable of uniformly supplying ink to the entire surface of a printing plate, and more particularly to an ink supply device capable of handling relatively high-viscosity ink.

[0002]

2. Description of the Related Art A conventional keyless ink supply device is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-93397, in which a part of the peripheral surface of a fountain roller (also called an ink source roller) is immersed in ink in an ink pan. By rotating the roller, the ink is guided above the peripheral surface of the roller, the ink is transferred to a downstream measuring roller, and excess ink is scraped off by a doctor blade abutting on the peripheral surface of the measuring roller. A large number of measuring cells (concave portions) provided on the entire peripheral surface of the measuring roller
And a substantially constant amount of ink remains, and the ink is supplied substantially evenly to the entire printing plate surface.

[0003] However, the conventional keyless ink supply device described in the preceding paragraph is compatible with low-viscosity ink, but when high-viscosity ink is used, the adhesion of the ink to the peripheral surface of the fountain roller is low. As a result, the ink was insufficiently guided above the peripheral surface of the roller, and effective ink supply was not possible.

On the other hand, the applicant of the present application has disclosed Japanese Patent Publication No.
As shown in Japanese Patent No. 5244, the ink in the ink fountain formed by the swash plate and the peripheral surface of the fountain roller moves downward from the gap provided between the peripheral surface of the fountain roller and the lower end of the swash plate. A keyless ink supply device compatible with high-viscosity ink that can handle relatively high-viscosity ink is proposed by rotating the fountain roller so as to be derived.

[0005]

However, this keyless ink supply device compatible with high-viscosity ink has problems to be solved with respect to scattering of ink and insufficient pressing force.

[0006] First, the ink is scattered by receiving ink near the peripheral surface of the ink fountain roller, which rotates in response to the ink being drawn downward from the ink fountain. Since the rotation direction of the peripheral surface of the downstream roller that is passed is set to be opposite to each other, ink is scattered when ink transfers between them, and the amount of scattering increases especially when the rotation speed is high. In addition, not only does the supply efficiency of the ink decrease, but also the surrounding stain becomes severe.

Next, the high-viscosity ink drawn from the ink fountain reaches the peripheral surface of the measuring roller without increasing the fluidity due to the application of a large external force, and is also supplied to the peripheral surface of the measuring roller. Because a large pressing force does not work,
Ink does not adhere well to the concave part on the peripheral surface of the measuring roller,
In some cases, the desired ink supply cannot be achieved.

On the other hand, the greatest advantage common to all of the conventional keyless ink supply apparatuses, namely, a function of being able to always supply ink having a substantially uniform thickness over the entire surface of the printing plate without adjustment by an ink adjustment key. However, the use of high-viscosity ink may disadvantageously affect color printing. That is, in the current printing industry, in color printing using relatively high-viscosity ink, ink is often applied to only a very limited part of the printing surface, such as spotlight printing, for example, the newspaper advertisement "Hinomaru". In some cases, it is not necessary to supply ink to the entire printing surface.In such a case, if a conventional keyless ink supply device is used, ink is supplied even to parts that are originally unnecessary, The waste was a lot of waste, and the subsequent cleaning was troublesome, time-consuming, and inefficient.

[0009] On the other hand, conventionally, printing using a special color other than the usual three primary colors (yellow, cyan, magenta) and black (black), a so-called special color, using an ink having a higher viscosity than usual, There is high quality printing with excellent color gloss and volume using high-intensity three primary color inks and black ink, and in order to respond to that printing, it is necessary to specially install high quality printing equipment, It has been difficult to perform printing by also using printing equipment by keyless ink supply. Therefore, in order to cope with both of the above printings, the above two types of printing equipment must be kept at all times,
There was much waste.

An object of the present invention is to provide an ink supply apparatus which solves the problems described in the above items (0005) to (0009) at once.

[0011]

SUMMARY OF THE INVENTION An ink supply device according to the present invention is a printing press for supplying ink to a printing plate of a plate cylinder and printing the printing plate. They are evenly disposed on the peripheral surface and its periphery in contact with the peripheral surface of the upstream side of the wearing roller in the supply of ink
Ink rotary friendly having a large number of the minute depressions to accommodate the
A weighing roller, an intermediate roller that rotates in contact with the peripheral surface on the upstream side of the weighing roller in the supply of ink, and a downstream side from a contact position with the intermediate roller, and A doctor means contacting the peripheral surface of the weighing roller on the upstream side of the contact position with the roller, and the doctor means facing upward, the upper part and the front part are opened, and both side plates and the inclined base are formed. And a peripheral surface provided at a position to close the front of the ink fountain, and at a position close to the front edge of the base of the ink fountain via a first gap, and the peripheral surface is displaced downward. A fountain roller that rotates by rotating the fountain roller and a peripheral surface of the fountain roller downstream of the fountain roller via a second gap that is smaller than the first gap, and a circumstance upstream of the intermediate roller. Evenly on the peripheral surface and its periphery in contact with the
A rotatable uneven roller with the arranged unevenness,
Ink having a thickness corresponding to the first gap drawn out by the rotation of the fountain roller,
Is supplied to the peripheral surface of the concavo-convex roller while being pressed when passing through the gap between the roller and the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller, and the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller. The fluidity increases due to the pressure and division caused by the pressure, and is supplied to the peripheral surface of the measuring roller.Furthermore, the excess ink on the peripheral surface of the measuring roller is scraped by a doctor means and returned to the ink fountain, while along the axis of the measuring roller. It features a full ink supply that supplies a substantially uniform amount of ink at all positions to the plate of the plate cylinder via the circumferential surface of the applicator roller.

[0012] In the ink supply device described in the preceding paragraph, the fine concave portion of the measuring roller has a concave portion provided regularly on the peripheral surface or a hollow portion formed evenly in the outer peripheral layer and opened on the peripheral surface. The doctor means consists of a depression, and further, the doctor means is a doctor roller rotating at a lower peripheral speed than the doctor blade, the doctor bar, the measuring roller, or a contact portion with the measuring roller, and is displaced in a direction opposite to the displacement of the peripheral surface of the measuring roller. And rotate as a doctor roller. In addition, the unevenness of the uneven roller is composed of a large number of regular projections having a circumferential surface separated by grooves.

Further, the ink supply device according to the present invention is
2. Description of the Related Art In a printing press that supplies ink to a printing plate of a plate cylinder and performs printing, a forming roller whose peripheral surface rotates in contact with the printing plate, and a forming roller that contacts an upstream peripheral surface of the forming roller in supplying ink. A rotatable metering roller having a surface and a number of fine recesses accommodating ink evenly arranged on the peripheral surface thereof , and a rotatable metering roller for supplying ink. The intermediate roller whose peripheral surface rotates in contact with the peripheral surface on the upstream side, the downstream side of the contact position with the intermediate roller, and of the weighing roller at the upstream side of the contact position with the wearing roller. A doctor means having means for selectively switching between a position in contact with the peripheral surface and a position separated from the peripheral surface, and facing the doctor means upward,
An ink fountain consisting of a side plate and an inclined base with the top and front open, and a position to close the front of the ink fountain, and
The ink base front edge of pot at a position close through the first gap provided circumferential surface, and a fountain roller peripheral surface thereof rotates displaced downward, the said first gap fouling <br /> and adjustment means of the first gap along the axial direction of the emission Ten roller provided in each adjustably ink fountain by sorting for each constant meth dividing partition, the peripheral surface of the downstream side of the fountain roller in the supply of ink the first proximity through a narrow second gap than the gap, and equally on the circumferential surface and the circumferential surface in contact with the peripheral surface on the upstream side of the intermediate roller
And a rotatable unevenness roller having a disposed the uneven, with to fully open the first gap, contacting the doctor means on the peripheral surface of the metering roller, drawn by the rotation of the fountain roller Ink having a thickness corresponding to the fully opened first gap is supplied to the peripheral surface of the concavo-convex roller while being pressed when passing through the second gap, and the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller. The fluidity increases due to pressure and splitting caused by the contact with the surface and the contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller, and the fluid is supplied to the peripheral surface of the measuring roller. Scraping it back with the doctor means in contact with the peripheral surface of the measuring roller and returning it to the ink fountain, while applying a substantially uniform amount of ink at all positions along the axis of the measuring roller A full ink supply to the plate of the plate cylinder via the peripheral surface, the first gap being adjusted to the required size for each division by the adjusting means, and the doctor means being connected to the peripheral surface of the measuring roller. The ink drawn out of the ink fountain at a desired thickness for each section by the rotation of the fountain roller by the rotation of the fountain roller passes through the second gap, and is uneven by an amount corresponding to the thickness of the ink for each section. While being supplied to the peripheral surface of the roller, the fluidity increases due to the pressure and division caused by the contact between the peripheral surface of the uneven roller and the peripheral surface of the intermediate roller and the contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller. The ink supplied to the peripheral surface of the roller, and the ink supplied to the peripheral surface of the measuring roller is supplied to the printing plate of the plate cylinder through the peripheral surface of the applying roller. It is characterized in that can be selected deviation or the other of the ink supply.

In the ink supply device described in the preceding paragraph, the fine concave portion of the measuring roller has a concave portion provided regularly on the peripheral surface, or a hollow portion formed uniformly in the outer peripheral layer and opened on the peripheral surface. The doctor means consists of a depression, and further, the doctor means is a doctor roller rotating at a lower peripheral speed than the doctor blade, the doctor bar, the measuring roller, or a contact portion with the measuring roller, and is displaced in a direction opposite to the displacement of the peripheral surface of the measuring roller. And rotate as a doctor roller. In addition, the unevenness of the uneven roller is composed of a large number of regular projections having a circumferential surface separated by grooves.

Further, the ink supply device according to the present invention is
2. Description of the Related Art In a printing press that supplies ink to a printing plate of a plate cylinder and performs printing, a forming roller whose peripheral surface rotates in contact with the printing plate, and a forming roller that contacts an upstream peripheral surface of the forming roller in supplying ink. A rotatable metering roller having a surface and a number of fine recesses accommodating ink evenly arranged on the peripheral surface thereof , and a rotatable metering roller for supplying ink. The intermediate roller whose peripheral surface rotates in contact with the peripheral surface on the upstream side, the downstream side of the contact position with the intermediate roller, and of the weighing roller at the upstream side of the contact position with the wearing roller. A doctor roller having means for contacting the peripheral surface and selectively switching between rotation for scraping the ink from the peripheral surface of the measuring roller and rotation for not scraping, and facing the doctor roller upward, the upper part and the front part. Open, with both side plates An ink fountain comprising an inclined base, a peripheral surface provided at a position for closing a front portion of the ink fountain, and a position close to a front edge of the base of the ink fountain via a first gap. a fountain roller surface rotates displaced downward, the first gap having a first respective adjustable ink fountain by sorting for each divided sections defined along the axial direction of said fountain roller clearance An adjusting means for supplying ink, which is close to a peripheral surface on a downstream side of the fountain roller via a second gap narrower than the first gap and in contact with a peripheral surface on an upstream side of the intermediate roller; Is evenly distributed on the peripheral surface and the peripheral surface
And the uneven roller rotatable with a unevenness was, with a,
While the first gap is fully opened, the doctor roller is switched to rotate to scrape the ink from the peripheral surface of the measuring roller, and the thickness corresponding to the fully opened first gap drawn out by the rotation of the fountain roller is adjusted. The ink that has been deposited is supplied to the peripheral surface of the concave and convex roller while being pressed when passing through the second gap, and is brought into contact with the peripheral surface of the concave and convex roller and the peripheral surface of the intermediate roller, and is weighed with the peripheral surface of the intermediate roller. The fluidity increases due to pressure and splitting caused by contact with the peripheral surface of the roller and is supplied to the peripheral surface of the measuring roller, and the excess ink on the peripheral surface of the measuring roller is further scraped off from the peripheral surface of the measuring roller. The doctor roller removes the ink and returns it to the ink fountain while applying a substantially uniform amount of ink at all positions along the axis of the measuring roller. A full ink supply to the plate of the plate cylinder via the peripheral surface, the first gap being adjusted to the required size for each division by the adjusting means, and the doctor means being connected to the peripheral surface of the measuring roller. The ink is drawn out of the ink fountain by the rotation of the fountain roller at a desired thickness for each section, and the ink is drawn for each section when the ink passes through the second gap. Is supplied to the peripheral surface of the concavo-convex roller by an amount corresponding to the thickness of the roller, and is pressed by contact between the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller, and contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller. Fluidity increases due to splitting and is supplied to the peripheral surface of the measuring roller,
Furthermore, the fluidity is increased by applying pressure and external force of splitting by the peripheral surface of the doctor roller that rotates without scraping the ink from the measuring roller on the peripheral surface of the measuring roller, and applies the ink to the plate through the peripheral surface of the roller. It is characterized in that either one of the two types of ink supply can be selected from the two-part ink supply to be supplied to the printing plate of the cylinder.

[0016] In the ink supply device described in the preceding paragraph, the fine concave portion of the measuring roller has a regular concave portion provided on the peripheral surface or a hollow portion formed evenly dispersed in the peripheral layer opened on the peripheral surface. Consisting of a depression, the rotation of the doctor roller when not scraping the ink from the peripheral surface of the measuring roller is the co-rotation by contact frictional force with the measuring roller, or the same peripheral speed as the peripheral surface of the measuring roller, This is a driving rotation in which the peripheral surface is displaced and rotated in the same direction as the change in the peripheral surface of the measuring roller at the contact portion with the measuring roller, and is used when scraping ink from the peripheral surface of the measuring roller .
Kicking rotation of the doctor roller, rotated by slower peripheral speed than the metering roller, or, at the contact portion with the metering roller is rotated to rotate displaced to the displacement in the opposite direction from the peripheral surface of the metering roller, and The unevenness of the uneven roller is made up of a large number of regular projections whose periphery is separated by grooves.

[0017]

The operation of the present invention will be described below.

First, when ink having a high viscosity is put into the ink fountain, the fluidity is low even though the first gap is provided between the leading edge of the bottom of the ink fountain and the peripheral surface of the fountain roller. Therefore, the ink is stored in the ink fountain without dripping from the first gap due to its own deformation.

Then, when the fountain roller is rotated in a direction in which the peripheral surface closing the open front portion of the ink fountain is displaced downward, the ink in the ink fountain touching this peripheral surface is rotated by the peripheral surface of the fountain roller. Following the displacement of the peripheral surface of the fountain roller due to the viscosity attached to the ink, the ink is drawn out from the ink fountain while being rolled to a thickness that can pass through the first gap.

In this manner, the continuous rotation of the fountain roller causes the high-viscosity ink in the ink fountain to be sequentially drawn out while adhering to the peripheral surface of the fountain roller at a constant thickness. A second gap is reached between the peripheral surface and the concave / convex roller adjacent to the peripheral surface. The second gap is set narrower than the first gap. Therefore, the ink adhering to the peripheral surface of the fountain roller is further rolled by the passage of the second gap, and is pressed against the irregular surface of the irregular roller while reducing its thickness. The external force acting as described above causes a temporary softening phenomenon in the ink, and the fluidity of the ink temporarily increases.

The concavo-convex roller rotates in a direction in which the peripheral surface facing the peripheral surface of the fountain roller is displaced in the same direction as the peripheral surface of the fountain roller facing the fountain roller. It is set faster than the peripheral speed. Therefore, the transfer of ink from the peripheral surface of the fountain roller to the peripheral surface of the uneven roller is
The protrusions on the peripheral surface of the uneven roller cut into the ink adhering to the peripheral surface of the fountain roller, which rotates slower than that, and scrape off that portion, and the scraped ink is taken into the convex portion and the concave portion adjacent thereto. Done by

The ink supplied to the peripheral surface of the concave-convex roller reaches a contact position with the intermediate roller by rotation of the concave-convex roller, and is supplied to the peripheral surface of the intermediate roller via the contact position. Supplied to the peripheral surface of the measuring roller reaches the contact position with the measuring roller by the rotation of the intermediate roller, and is supplied to the peripheral surface of the measuring roller via the contact position.

When the ink passes from the concavo-convex roller to the intermediate roller, and further from the intermediate roller to the measuring roller, both passing through the contact positions of the peripheral surfaces of both rollers,
Due to the contact between the peripheral surfaces of the two rollers, a pressing force is applied to the ink film, and the ink film adheres to and separates from the peripheral surfaces of the two rollers, causing pressure and division on the ink film. Due to these external forces acting on the ink, a temporary softening phenomenon occurs in the ink, and the fluidity of the ink further increases temporarily.
The supply of ink is performed reliably and sufficiently.

The ink supplied to the peripheral surface of the measuring roller in this way is carried to the position of contact with the doctor means by the rotation of the measuring roller, and excess ink on the peripheral surface of the measuring roller is scraped off by the doctor means. The scraped-off ink is collected in an ink fountain provided with its upper part opened below the doctor means.

The doctor means includes an ink scraping type in which the contact portion with the peripheral surface of the measuring roller is invariable, such as a doctor blade or a doctor bar, and a contact portion with the peripheral surface of the measuring roller, such as a doctor roller. There is a variable type, that is, an ink scraping type in which the doctor roller is rotated so as to be displaced in a different direction from the peripheral surface speed of the measuring roller and / or in a different direction, and the invention according to claims 1 to 8, Suitable for both ink scraping types.

In the preceding paragraph, when the latter, that is, the doctor means of the variable rotation type ink scraping type is adopted, it is left on the peripheral surface of the measuring roller by utilizing the elastic fluid lubrication (elastohydrolubrication) phenomenon. It is possible to adjust the amount of ink, thereby changing the printing density of the entire printing surface.

The ink on the peripheral surface of the measuring roller from which the excess ink has been scraped off by the doctor means reaches the contact position with the forming roller by the rotation of the measuring roller, and contacts the peripheral surface of the forming roller via the contact position. The ink supplied and further supplied to the peripheral surface of the application roller reaches the contact position with the printing plate by the rotation of the application roller, and the ink is supplied with a substantially uniform thickness over the entire printing plate.

Immediately after that, the peripheral surface downstream of the setting roller that has come into contact with the printing plate has a thickness of the residual ink between the portion where the ink is supplied to the image portion of the printing plate and the portion where the ink is not supplied. However, due to the subsequent rotation, by the same operation as described above, the ink is supplied from the peripheral surface of the measuring roller in such a manner that the difference in the thickness of the ink can be nullified, and the ink supply to the printing plate and the measuring roller are performed. The ink supply from the peripheral surface is continuously repeated.

The rollers provided downstream of the concave and convex rollers in the ink supply have substantially the same peripheral surface speed as the peripheral surface speed of the printing plate of the plate cylinder. The surface is displaced and rotated in the same direction at the contact position. Thereby, the supply of the ink to the downstream is performed smoothly, and unnecessary wear of each roller and generation of frictional heat are prevented.

Next, the inventions according to the ninth to sixteenth aspects and the inventions according to the seventeenth to twenty-fourth aspects can perform printing in a keyless ink supply mode when it is necessary to uniformly supply the entire surface of the printing plate. On the other hand, in the case of printing that is wasteful, inconvenient, or unsuitable for keyless ink supply, printing can be performed by switching to a non-keyless ink supply mode.

That is, the invention according to claims 9 to 16 and the inventions according to claims 17 to 24 are characterized in that, in the former, the doctor means comes into contact with the peripheral surface of the measuring roller, and in the latter, it comes from the peripheral surface of the measuring roller. By changing the rotation of the doctor roller from the rotation that does not scrape the ink to the rotation that scrapes the ink, excess ink can be scraped off from the peripheral surface of the measuring roller, and both of them can adjust the first gap provided in the ink fountain. By operating the device with the means fully opened, it is possible to provide substantially the same operation as the inventions described in the first to eighth aspects, that is, to provide a substantially keyless ink supply to the entire surface of the printing plate at all times.

On the other hand, the invention according to claims 9 to 16 and the inventions according to claims 17 to 24 are characterized in that in the former, the doctor means is separated from the peripheral surface of the measuring roller, and in the latter, the rotation of the doctor roller is performed. The rotation of the fountain roller is switched from the rotation of scraping the ink from the peripheral surface of the measuring roller to the rotation of not scraping the ink, so that the scraping of excess ink is lost. If the first gap between the front edge of the base of the ink fountain and the peripheral surface of the fountain roller is adjusted in accordance with the distribution of the image on the plate surface for each of the sections divided along the axial direction, each section becomes non-keyless. In each case, a necessary and sufficient amount of ink can be supplied to a desired portion of the printing plate surface.

In order to cut off the ink supply from the fountain roller to the concave / convex roller for each section for the section that does not require the ink supply, the first gap between the front edge of the base of the ink fountain and the peripheral surface of the fountain roller is defined as follows. Adjustment is made for each section by the first gap adjusting means so as to be smaller than the second gap between both peripheral surfaces of the fountain roller and the uneven roller.

In order to supply ink only to a limited division, the ink fountain is partitioned in accordance with the division and ink is stored only in the partition.

In the invention according to claims 17 to 24, when the doctor roller is rotated so as not to scrape the ink from the peripheral surface of the measuring roller, the doctor roller presses the ink on the peripheral surface of the measuring roller. And acts as a rider roller to split it.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the ink supply device according to the present invention will be described below with reference to the drawings. First, FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention. In FIG. 1, an ink fountain 1 includes a base 11 that is inclined downward toward the peripheral surface of the fountain roller 2, and side plates 12, 12 that partition both sides of a groove formed by the base and the peripheral surface of the fountain roller 2. The upper part of the ink fountain 1 is opened, and the ink is stored in the groove. A first gap 13 (see FIG. 20) is provided between the inclined lower end of the base 11 and the peripheral surface of the fountain roller 2, and the ink adhered to the peripheral surface of the fountain roller from the first gap 13 is removed. It is pulled out by the rotation of the roller.

According to the first to eighth aspects of the present invention, the first gap 13 is constant as shown in the embodiments of FIGS. On the other hand, according to the invention described in claims 9 to 24, as shown in the embodiment of FIGS. 9 to 15, the first gap is provided for each divided section divided into a predetermined width along the axial direction of the fountain roller. Can be adjusted widely or narrowly by the adjusting means 14.

As shown in FIG. 20, for example, the adjusting means 14 fixes the bottom plate 142 at an appropriate interval from the inclined upper surface of the base 11 and
2, a plurality of divided adjusting plates 141 having a thickness matched to this interval are provided side by side so as to be in contact with each other in the axial direction of the fountain roller 2, and the divided adjusting plates 141 are further provided on the peripheral surface of the fountain roller 2. A moving mechanism is provided so as to be able to move far and near.

This moving mechanism includes a compression spring 146 for moving the split adjusting plate 141 away from the peripheral surface of the fountain roller 2.
And the split adjusting plate 141 against the force of the compression spring 146.
Push rod 143 which holds down and pushes back the rear end of the push rod 1
43, an end face cam 145 having a ring-shaped inclined surface facing the rear end, a cam follower 144 attached to the rear end of the pusher 143, and in contact with the inclined surface of the cam, and rotating the end cam 145. And a transmission mechanism 147 in which several gears for transmitting power from the drive source 148 are engaged. The drive source 14
8, an operation knob 149 is provided on one of the output shafts so that manual operation can be performed.

The open front edge of the ink fountain 1 is closed by the peripheral surface of the fountain roller 2 provided through the first gap 13 with respect to the inclined lower end of the base 11 as described above.

The fountain roller 2 rotates in a direction in which the peripheral surface closing the open front edge of the ink fountain is displaced downward, and its rotational peripheral speed changes according to the change in the rotational peripheral speed of the plate cylinder. It is slower than the rotational peripheral speed of the trunk, and the contrast is, for example, 1/30 to 1/100.

At a downstream side of the fountain roller 2 in ink supply, a second gap smaller than the first gap 13 is provided.
The uneven roller 3 whose peripheral surface faces the peripheral surface of the fountain roller 2 in the gap 33 (see FIGS. 5 to 7 and FIGS. 9 to 15).

As shown in FIG. 4, on the peripheral surface of the concave-convex roller 3, there are provided a large number of projections 31 each of which is surrounded by grooves 32.
The ink on the peripheral surface of the fountain roller 2 is easily received and accepted. The shape of the projection 31 is shown in FIG.
In addition to the diamond shape shown in FIG. 7, the shape may be a triangle, a circle, or the like. Further, instead of the regular unevenness as shown in FIG. 4, a peripheral surface having uniform satin-like unevenness may be provided.

On the downstream side of the uneven roller 3 in the ink supply, an intermediate roller 4, a measuring roller 5, and a setting roller 7 are sequentially provided with their peripheral surfaces in contact with each other. Provided in contact with the printing plate. Then, the uneven roller 3, the intermediate roller 4, the measuring roller 5, and the application roller 7 are all rotated at a rotational peripheral speed substantially equal to the rotational peripheral speed of the plate cylinder.

The fountain roller 2, the uneven roller 3, the intermediate roller 4, the weighing roller 5, and the application roller 7 are displaced in the same direction at the mutually opposing portions or the mutually contacting portions. At the point of contact with the printing plate, the wear roller 7 rotates and its peripheral surface is displaced in the same direction as the direction in which the printing plate displaces.

In the above-described layout of the roller arrangement, the intermediate roller 4 is supplied with ink from the concave / convex roller 3, and in the process of supplying this ink to the downstream measuring roller 5, compression and division are repeatedly applied to the ink twice. This repetition temporarily increases the fluidity of the ink due to the temporary softening phenomenon, and sets favorable conditions for downstream supply. The intermediate roller 4 has, for example, a surface hardness of 2
This is a roller having a rubber surface layer of 0 to 40 degrees (Shore A).

As shown in FIG. 2, on the peripheral surface of the measuring roller 5, a large number of fine concave portions capable of storing a predetermined amount of ink are uniformly arranged. These recesses are used for measuring rollers 5
Of microcavities 55 uniformly distributed in the base material 54 constituting the outer peripheral layer 53, that is, specifically, for example, the synthetic resin of the base material 54 has a diameter of 5 to 300
The outer peripheral layer 53 of the roller is formed by mixing and dispersing micro hollow bodies of about μm.

The substrate 5 constituting the outer peripheral layer 53 as described above
The measuring roller 5 in which the minute cavities 55 are evenly dispersed in
When receiving the ink scraping action by the doctor means 6 described later, even if the peripheral surface of the measuring roller 5 is worn out and the microcavity 55 opening on the surface disappears, the microcavity 55 located below the same is removed. Since the ink is newly opened on the surface, a significant change does not occur in the amount of ink accommodated in the concave portion of the peripheral surface as the measuring roller 5.

The measuring roller 5 having the outer peripheral layer in which the fine hollow body is mixed and dispersed in the synthetic resin is formed, for example, with a surface hardness of 70 to 100 degrees (Shore A).

As shown in FIG. 3, the concave portion on the peripheral surface of the measuring roller 5 may be formed by regularly arranged depressions (cells) 51 and banks 52 surrounding the depressions. Such a depression 51 is formed at a density of 80 to 200 lines / cm by subjecting a material such as a metal, a synthetic resin, and tungsten carbide to rolling, laser processing, corrosion, or the like.

The doctor means 6 comes into contact with the peripheral surface of the measuring roller which is downstream of the contact position with the intermediate roller 4 and upstream of the contact position with the wearing roller in the rotation direction of the measuring roller 5. The specific configuration is, for example, a doctor blade 6 shown in FIG.
1, a doctor bar 62 shown in FIG. 6 and a doctor roller 63 shown in FIG. 7, all of which contact the peripheral surface of the weighing roller 5 during the printing operation over the entire length thereof. Excessive ink is scraped off from the peripheral surface.

First, in FIG. 5, the doctor blade 61 has a blade 6 that contacts the peripheral surface of the measuring roller 5.
11 and a blade holder 612 supporting the same, and are supported by a frame (not shown).

Next, referring to FIG.
2 is a bar 621 that contacts the peripheral surface of the measuring roller 5,
The bar comprises a back step stay 622 for suppressing the bending deformation of the bar, and is supported by a frame not shown.

Further, in FIG. 7, the doctor roller 63 comprises a doctor roller 63 which comes into contact with the peripheral surface of the measuring roller 5, and is rotatably supported by a frame (not shown).

In the present invention, the doctor roller 63 is designed to have various driving mechanisms listed below so as to correspond to various printing modes. That is, as shown in FIG. 8, the doctor roller 63 can rotate at a rotation peripheral speed lower than that of the measuring roller 5 and in a direction in which the peripheral surface is displaced in the same direction as the peripheral surface of the measuring roller 5 at the contact portion. A simple drive mechanism is provided. Alternatively, as shown in FIGS. 18 and 19, the doctor roller 63 can be driven in a direction in which the peripheral surface is displaced in a direction opposite to the peripheral surface of the measuring roller 5 at the contact portion regardless of the rotational peripheral speed. Provide a mechanism.

The drive mechanism 64 shown in FIG. 8 rotates the transmission gear 643 located on the upstream side of the drive via the gear 642 on the measuring roller side attached to the end shaft of the measuring roller 5.
The transmission to the gear 641 on the doctor roller side attached to the end shaft of the doctor roller 63,
Is transmitted in such a manner that its peripheral surface is displaced in the same direction as the peripheral surface of the measuring roller 5 at the contact portion with the measuring roller 5 and rotates at a rotational peripheral speed lower than the rotational peripheral speed of the measuring roller.

The drive mechanism 65 shown in FIG. 18 is provided integrally with the first gear 652 on the measuring roller side attached to the end shaft of the measuring roller 5 by rotating the transmission gear 654 located on the driving upstream side. The second gear 653 on the measuring roller side and the intermediate gear 655 rotatably supported on the frame 9 by appropriate means, the gear 65 on the doctor roller side attached to the end shaft of the doctor roller 63.
To transmit the power so that the doctor roller 63 rotates in such a manner that the peripheral surface of the doctor roller 63 is displaced in a direction opposite to the peripheral surface of the measuring roller 5 at a contact portion with the measuring roller 5.

The drive mechanism 66 shown in FIG. 19 is provided with an independent doctor roller drive source 664 on the upstream side of the drive, and rotates the drive source 664 with a pulley 663 on the drive source side attached to the output shaft of the drive source 664. , Doctor roller 6
Pulley 6 on the doctor roller side attached to end shaft 3
The doctor roller 63 is transmitted to the doctor roller 63 via a transmission belt 665 wrapped around the roller 61, and the doctor roller 63 is rotated.

The driving source 66 includes the doctor roller 6
In selecting the rotation direction of No. 3, the rotation direction of the drive source 664 can be changed by selecting either the right rotation or the left rotation. Further, the rotation peripheral speed of the doctor roller 63 can be changed by controlling the number of rotations of the output shaft of the drive source 664 per unit time. The change in the rotational peripheral speed of the doctor roller 63 makes it possible to change the thickness of the ink passing through the contact portion between the metering roller 5 and the doctor roller 63 by using the elastic fluid lubrication phenomenon, whereby the entire printing surface is Concentration can be changed. Also, the doctor roller 63,
The driving rotation can be performed in both a rotation for scraping the ink from the peripheral surface of the measuring roller 5 and a rotation for not scraping the ink from the peripheral surface of the measuring roller 5. Doctor roller 63
It is desirable to select the material and hardness according to the material and hardness of the surface of the measuring roller 5.

Further, in this drive mechanism 66, in order to surely transmit the rotation to the doctor roller 63, the pulley 663 on the drive source side and the pulley 66 on the doctor roller side are used.
1 is a toothed pulley, and the transmission belt 665 is desirably a toothed belt that meshes with the teeth of the pulley and is transmitted. The position of the belt pulley 662 is set so that the slack of the transmission belt 665 can be removed. It is urged against the surface of the transmission belt 665 by the force of the torsion spring 666 so that it can be displaced in accordance with the change in looseness.

In the embodiment shown in FIG. 19, the measuring roller 5 is driven by, for example, a driving mechanism linked to an opposite end shaft (not shown).

The application roller 7 is supplied with substantially uniform ink over the entire length from the peripheral surface of the measuring roller 5 after the excess ink has been scraped off by the doctor means 6, and the ink is applied to the plate of the plate cylinder 8. Supply. Wearing roller 7
Is a roller having a rubber surface layer having a surface hardness of 20 to 40 degrees (Shore A), for example.

According to the ninth to twenty-fourth aspects of the present invention, the doctor means 6 may move the doctor means 6 between a position in contact with the measuring roller 5 and a non-contacting position, that is, a position distant from the measuring roller 5 as necessary during printing operation. To be selectively changeable.

As shown in the embodiments of FIGS. 9 and 10, when the doctor means 6 is the doctor blade 61, the doctor holder 612 is attached to a holder displacement shaft 613 provided on the frame so as to be angularly displaceable. And an attachment / separation arm 614 attached to at least one side of the holder displacement shaft 613, and a drive for bringing the blade 611 into or out of contact with the peripheral surface of the measuring roller 5 at the open end of the attachment / detachment arm 614. The output rod of a hydraulic cylinder 615, which is a source, is connected to the hydraulic cylinder 615, and the hydraulic cylinder 615 is attached to a frame (not shown) so as to be capable of angular displacement by a hydraulic cylinder support shaft 616. And a rotation displacement mechanism for coming into contact with and separating from the peripheral surface.

As shown in the embodiments of FIGS. 11 and 12,
When the doctor means 6 is the doctor bar 62, stay end shafts 623 are provided at both ends of the backup stay 622 so as to be angularly displaceable on a frame (not shown), and the doctor blade 61 is attached to at least one of the stay end shafts 623. A mechanism (not shown) similar to that in the case of (1) is linked, and this is a rotation displacement mechanism for bringing the bar 621 into and out of contact with the peripheral surface of the measuring roller 5.

As shown in the embodiments of FIGS. 13 and 14,
When the doctor means 6 is the doctor roller 63, both ends of the doctor roller 63 are held by the eccentric sleeve 631 as shown in FIG.
3 is a mechanism for contacting and separating the peripheral surface of the measuring roller 5. That is, the eccentric sleeve 631 is angularly displaced with respect to the frame 9 by appropriate means,
3 is moved to a position in contact with the measuring roller 5 (FIG. 13) and a position away from the measuring roller 5 (FIG. 14).
As shown in FIG. 16, the driving mechanism for rotating the doctor roller 63 has the same configuration as the driving mechanism 64 (FIG. 8), but the driving mechanism 66 (FIG. 1).
9) or 65 (FIG. 18).

[0067] On the other hand, in the invention described in claim 1 7 to 24, during the printing operation, provided with such contact a doctor roller 63 on the peripheral surface of the metering roller 5, the rotation of the doctor roller 63, the metering roller 5 It is provided so as to be selectively changeable between rotation for scraping ink and rotation for not scraping ink.

First, the rotation of the doctor roller 63 for scraping the ink from the measuring roller 5 is such that the rotation peripheral speed of the doctor roller 63 is lower than the rotation peripheral speed of the measuring roller 5 or the doctor roller 63 is rotated by the measuring roller. 5, at the contact portion with the rotation of the peripheral surface of the measuring roller 5 is displaced in a direction opposite to the displacement of the peripheral surface of the measuring roller 5,
The rotation of the doctor roller 63 that does not scrape is a rotation in which the doctor roller 63 is displaced in the same direction as the displacement of the peripheral surface of the measuring roller 5 at the contact portion with the measuring roller 5, and Doctor roller 63
Is a rotation at which the rotational peripheral speed of the roller is substantially the same as the rotational peripheral speed of the measuring roller 5.

Next, as shown in FIG. 17, the mechanism for selectively changing the rotation of the doctor roller 63 as described above is the same as the driving mechanism 64 shown in FIG. An electromagnetic clutch 644 is provided between the doctor roller 63 and the doctor roller 63.
A mechanism for switching between a state in which the rotation transmitted to 1 is transmitted to the doctor roller 63 and a state in which the doctor roller 63 is completely separated from the drive mechanism 64.

A similar mechanism is a driving mechanism 66 shown in FIG.
The drive mechanism 65 shown in FIG.

In the drive mechanism 66 shown in FIG. 19, as mentioned above, the rotation of the doctor roller 63 is controlled by appropriately setting and switching the number of rotations of the drive source 664 per unit time. 5 can be changed to a rotation for scraping the ink and a rotation for not scraping the ink.

In each of the embodiments described above, when performing printing requiring normal print quality, that is, printing by keyless ink supply, as shown in FIGS. 5 to 7, the base 11 of the ink fountain 1 or the first The first distance between the split adjusting plate 141 of the gap adjusting means 14 and the peripheral surface of the fountain roller 2
When the doctor means 6 is the doctor roller 63, the doctor roller 63 scrapes the ink from the peripheral surface of the measuring roller 5 when the doctor means 6 is in contact with the peripheral surface of the measuring roller 5. The printing operation is performed by selecting the rotation.

On the other hand, when the print or the print image requiring higher quality is present only in a part of the plate cylinder 8 in the axial direction, the printing is performed by the non-keyless ink supply. That is, as shown in FIGS.
Embodiments corresponding to the inventions described in claims 9 to 24 (FIG. 9)
15 to the first gap width adjusting means 1.
4, the dividing adjustment plate 141 is moved to the fountain roller 2
The first gap 13 between the tip of the split adjusting plate 141 and the peripheral surface of the fountain roller 2 is adjusted with respect to the peripheral surface of the fountain roller 2.
In accordance with the distribution of the printing plate image of the plate cylinder 8 in each of the divided sections in the axial direction of the plate cylinder 8 so that a desired amount of ink can be drawn out. When the doctor roller 63 cannot be separated from the peripheral surface of the measuring roller 5 by the doctor roller 63, or the doctor means 6 cannot be separated from the peripheral surface of the measuring roller 5, the doctor roller 63 rotates so as not to scrape ink from the peripheral surface of the measuring roller 5. And print operation.

When printing is performed on a printing plate in which the print image exists only in a part of the plate cylinder 8 in the axial direction, printing is performed by non-keyless ink supply. At that time, as shown in FIG.
The ink fountain partitioning means 15 is attached to a portion of the printing plate which matches the area of the printing image.
When the printing operation is performed by storing the ink in the ink, the area to which the ink adheres in the ink supply is limited, the waste of the ink can be reduced, and the cleaning of the ink fountain 1 or the like after the printing operation is limited to only the limited area. It is very easy.

The ink fountain partitioning means 15 comprises a bottom plate 1 for partitioning.
51, a partition side plate 152 and a handle 153 for facilitating the handling of the ink fountain partitioning means 15. The front side of the partition side plate 152 is a rotating fountain roller 2.
Is formed so as to be in close contact with the peripheral surface of the fountain roller 2, and the concave curved surface is formed of a material having a low hardness such as a synthetic resin or a synthetic resin so as not to damage the peripheral surface of the fountain roller 2. It is formed of lead or the like. Also,
The partition bottom plate 151 reduces the size of the maximum opening of the first gap 13 between the division adjusting plate 141 and the peripheral surface of the fountain roller 2 when the ink fountain partitioning means 15 is brought into close contact with the ink fountain 1. Is set so that there is no gap, and the facing distance between the two partitioning side plates 152 is set to be slightly wider than the printing image area of the printing plate.

In the keyless ink supply, when the doctor means 6 scrapes the ink from the measuring roller 5,
The presence or absence of the ink causes a very large difference in the frictional force between the doctor means 6 and the measuring roller 5, causing uneven wear on the peripheral surface of the measuring roller 5. No supply can be made.

[0077]

In the ink supply apparatus according to the present invention, firstly, a mechanism for temporarily softening a high-viscosity ink, that is, a mechanism for temporarily increasing the fluidity, is provided in an overlapping manner at various points in the ink supply path. As a result, we succeeded in reliably supplying high-viscosity ink to the plate surface of the plate cylinder,
That is, if this is sequentially described from the configuration according to the present invention, from the first gap between the front edge of the base of the ink fountain and the fountain roller, while riding on the peripheral surface of the fountain roller, downward, When the ink in the ink fountain is rolled to a thickness corresponding to the first gap and the ink in the ink fountain is drawn out, the initial temporary softening starts due to the external force due to the rolling, and the ink is further removed from the peripheral surface of the fountain roller. When moving to the uneven circumferential surface of the uneven roller through the second gap narrower than the first gap, the circumferential speed rotation of the uneven roller is set faster than the circumferential speed rotation of the fountain roller to forcibly press the ink. And further promote temporary softening, so that it easily adheres to the concave portion of the uneven roller, furthermore, the contact between the uneven roller and the intermediate roller, the intermediate roller In the process of contact between the ink and the measuring roller, the ink is repeatedly subjected to pressure and division, so that the ink easily adheres to the dent of the measuring roller. Due to the action of external force, the fluidity is sufficiently increased, and thus high-viscosity ink, which has been impossible until now,
It has become possible to supply the printing plate of the plate cylinder reliably, smoothly and continuously.

Further, the present invention which facilitates the supply of the high-viscosity ink to the printing plate as described above has opened a way to sufficiently cope with the multifunctionality of the printing mode. That is, on the other hand, it can provide a multifunctional printing machine having an ink supply that can be shared as a facility for high-quality printing, while having a function as a facility for normal-quality printing. I made it.

First, in the case where a full-page uniform printing mode by keyless ink supply is desired as equipment corresponding to normal quality printing, the first gap adjusting means provided in the ink fountain is described in claims 1 to 8. In the invention of claim 1, it is unnecessary, and the invention of claims 9 to 16 and claim 1
In the inventions described in Nos. 7 to 24, while switching the doctor means including the doctor blade, the doctor bar, and the doctor roller, it is used in a fully open state.
According to the inventions described in (1) to (8), the switching means is unnecessary, and the switching means is brought into contact with the peripheral surface of the measuring roller. In the inventions described in (9) to (16) and (17) to (24), the switching means is used. The contact,
In the doctor roller, the rotation of the doctor roller is changed to the ink scraping rotation in addition to the contact, that is, the peripheral speed of the measuring roller is lower than the peripheral speed of the measuring roller, or the doctor roller is rotated with respect to the peripheral surface of the measuring roller. This can be realized by switching the rotation to the rotation in which the peripheral speed is opposite at the contact position.

Next, when a partial printing mode by non-keyless ink supply is desired as equipment corresponding to high-quality printing, that is, the inventions according to claims 9 to 16 and the inventions according to claims 17 to 24 According to the invention, the first gap adjusting means provided in the ink fountain is operated to adjust the gap to a required size for each divided section, while the doctor blade, the doctor bar and the doctor roller including the doctor roller are switched. In the case of the doctor roller, in addition to the separation, the rotation of the doctor roller is changed to a rotation that does not scrape the ink, that is, at the contact portion with the measuring roller, the peripheral surface is in the same direction as the peripheral surface of the measuring roller. So that it can be realized by switching to a rotation in which the rotational peripheral speed is the same as the rotational peripheral speed of the measuring roller. Was Tsu.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment (claims 1 and 4) of an ink supply device according to the present invention;

FIG. 2 is an enlarged view showing one embodiment (claims 2, 10 and 18) of the peripheral surface of the measuring roller in the ink supply device according to the present invention, including a partial cross section of a part of the peripheral surface;

FIG. 3 shows another embodiment of the peripheral surface of the measuring roller in the ink supply device according to the present invention (claims 3, 11 and 19).
An enlarged view including a partial cross section of a part of the peripheral surface,

FIG. 4 is an enlarged view showing one embodiment (claims 8, 16 and 24) of the peripheral surface of the uneven roller in the ink supply device according to the present invention, including a partial cross section of a part of the peripheral surface;

FIG. 5 is a side sectional view of FIG. 1 showing an embodiment of a keyless-only type in which doctor means is a doctor blade.
And 4) are shown.

FIG. 6 is a side sectional view showing an embodiment (claims 1 and 5) of a keyless-only type in which doctor means is a doctor bar in the ink supply device according to the present invention;

FIG. 7 is a side sectional view showing an embodiment (claims 1 and 6) of a keyless-only type in which doctor means is a doctor roller in the ink supply device according to the present invention;

8 is an enlarged view of a main part including a partial cross section showing an example of a driving mechanism of the doctor roller shown in FIG. 7,

FIG. 9 is a side sectional view showing a keyless ink supply mode in a keyless non-keyless dual-use embodiment (claims 9 and 12) in which the doctor means is a doctor blade in the ink supply device according to the present invention;

FIG. 10 is a side sectional view showing a non-keyless ink supply mode in the embodiment (claims 9 and 12) of FIG. 9;

FIG. 11 is a side sectional view showing a keyless ink supply mode in a keyless non-keyless dual-use embodiment in which the doctor means is a doctor bar in the ink supply device according to the present invention (claims 9 and 13);

FIG. 12 is a side sectional view showing a non-keyless ink supply mode in the embodiment (claims 9 and 13) of FIG. 11;

FIG. 13 is a side sectional view showing a keyless ink supply mode in an embodiment of a keyless non-keyless dual use type in which doctor means is a doctor roller in the ink supply device according to the present invention (claims 9, 14, 17 and 22);

FIG. 14 is a side sectional view showing a non-keyless ink supply mode in the embodiment (claims 9 and 14) of FIG. 13;

FIG. 15 shows the embodiment of FIG. 13 (claims 17, 20 and 2);
Side sectional view showing the non-keyless ink supply mode in 1),

FIG. 16 shows the embodiment of FIGS. 13 and 14 (claims 9 and 1);
4) an enlarged view of a main part including a partial cross section showing an example of a driving mechanism of the doctor roller in 4) and an example of a unit for contacting and separating the doctor roller from the measuring roller;

FIG. 17 shows an example in which the transmission of power to the doctor roller is turned on / off in a mode in which the doctor roller is in contact with the weighing roller in the embodiment (claims 17 and 20) of FIG. An enlarged view of a main part including a partial cross-sectional view showing an embodiment in which the roller is rotated with the rotation of the roller,

FIG. 18 shows the embodiment of FIGS. 7, 13 and 15;
In the mode in which the doctor roller is in contact with the measuring roller, the rotation of the peripheral surface of the doctor roller is reversed at the contact position with respect to the rotation of the peripheral surface of the measuring roller. Enlarged view,

FIG. 19 shows an embodiment of FIGS. 7, 13 and 15;
Example of a drive mechanism capable of switching the rotation of the peripheral surface of the doctor roller in both forward and reverse directions at the contact position with respect to the rotation of the peripheral surface of the measurement roller in a mode in which the doctor roller is in contact with the measurement roller, and changing the rotation speed. An enlarged view of a main part including a partial cross section showing

FIG. 20 shows an embodiment of the first gap adjusting means provided in the ink fountain in the ink supply device according to the present invention (claims 9, 10, 11, 12, 13, 14, 15, 16, 1).
7, 18, 19, 20 and 23).

FIG. 21 is a perspective view showing an embodiment of a partitioning means for dividing an ink fountain in the ink supply device according to the present invention and using a part thereof;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 ink fountain 11 base 12 side plate 13 first gap (between front edge of base of ink fountain and peripheral surface of fountain roller) 14 means for adjusting first gap (FIG. 20) 141 plurality of split adjusting plates 142 bottom plate 143 Push rod 144 Cam follower 145 End cam 146 Compression spring 147 Transmission mechanism 148 Drive source 149 Operating knob 15 Partitioning means (FIG. 21) 151 Partitioning bottom plate 152 Partitioning side plate 153 Handle 16 Ink 2 Fountain roller 3 Irregularities 4) 32 groove 33 second gap 4 intermediate roller 5 measuring roller 51 depression (cell) (FIG. 3) 52 embankment 53 outer layer 54 base material 55 microcavity (FIG. 2) 6 doctor means 61 doctor blade (FIG. 5) 611 Blade 612 Blade holder 613 Holder displacement axis 61 Contacting the separated arm 615 hydraulic cylinder 616 hydraulic cylinder support shaft 62 a doctor bar (6) 621 bar 622 backup stays 62 3 stay-end shaft 63 doctor roller (7) 631 eccentric sleeve for connecting and disconnecting (FIG. 16 64) Drive mechanism of the doctor roller (FIG. 8) 641 Gear of the doctor roller side 642 Gear of the measuring roller 643 Transmission gear of the drive upstream side 644 Electromagnetic clutch 65 Drive mechanism of the doctor roller (FIG. 18) 651 Gear 652 of the doctor roller side First gear 653 on measuring roller side Second gear 654 on measuring roller side Transmission gear 655 Intermediate gear 66 Driving mechanism of doctor roller (FIG. 19) 661 Pulley on doctor roller side 662 Pulley for belt tension 663 Pulley on driving source side 664 Dogen 665 frame of Nerijibane 7 wearing roller 8 edition cylinder 9 printing press of the transmission belt 666 belt tensioning

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-268945 (JP, A) JP-A-2-106350 (JP, A) JP-A-48-65005 (JP, A) JP-A-1- 228844 (JP, A) JP 5-24361 (JP, U) JP 4-11646 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 31/20 B41F 31 / 14 B41F 31/26

Claims (24)

(57) [Claims] 1. A printing press for supplying ink to a printing plate of a plate cylinder for printing, comprising: a forming roller having a peripheral surface rotating in contact with the printing plate; a peripheral surface in contact with the surface, a number of rotatable metering roller having a minute concave portions for accommodating the uniformly arranged by ink on its peripheral surface, the upstream side of the periphery of the metering roller in the supply of ink An intermediate roller whose peripheral surface rotates in contact with a surface, and contacts a peripheral surface of the weighing roller downstream of a contact position with the intermediate roller and upstream of a contact position with the wearing roller. The doctor means, the doctor means facing upward, the upper part and the front part open, the ink fountain consisting of both side plates and the inclined base, the position for closing the front part of the ink fountain, and Inkwell base A fountain roller is provided at a position close to the front edge of the table via a first gap, and the fountain roller is rotated while the circumferential surface is displaced downward. close through a narrow second gap than the first gap, and a peripheral surface in contact with the peripheral surface on the upstream side of the intermediate roller, evenly arranged on its circumferential surface irregularities
A rotatable concave-convex roller having: and a first roller pulled out by rotation of the fountain roller.
The ink having a thickness corresponding to the gap between the rollers is supplied to the peripheral surface of the concave-convex roller while being pressed when passing through the second clearance, and the peripheral surface of the concave-convex roller contacts the peripheral surface of the intermediate roller. The fluidity increases due to the pressure and division caused by the contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller, and the fluid is supplied to the peripheral surface of the measuring roller. Taking the ink back to the ink fountain, and applying a substantially equal amount of ink at all positions along the axis of the measuring roller to the printing plate of the plate cylinder through the peripheral surface of the roller, thereby providing a full ink supply. Feeding device. 2. The ink supply device according to claim 1, wherein the fine concave portion of the measuring roller comprises a regularly provided concave portion on a peripheral surface. 3. The ink supply device according to claim 1, wherein the fine concave portion of the measuring roller is formed by a hollow portion formed in the outer peripheral layer and having a hollow portion opened on the peripheral surface. 4. The ink supply device according to claim 1, wherein the doctor means is a doctor blade. 5. The ink supply device according to claim 1, wherein the doctor means is a doctor bar. 6. The ink supply device according to claim 1, wherein the doctor means is a doctor roller which rotates at a peripheral speed lower than that of the measuring roller. 7. The ink supply device according to claim 1, wherein the doctor means is a doctor roller which rotates in a direction opposite to the displacement of the peripheral surface of the measuring roller at a contact portion with the measuring roller. 8. The ink supply device according to claim 1, wherein the unevenness of the uneven roller is composed of a large number of regular projections whose periphery is separated by grooves. 9. A printing press for supplying ink to a printing plate of a plate cylinder for printing, comprising: a forming roller having a peripheral surface rotating in contact with the printing plate; a peripheral surface in contact with the surface, a number of rotatable metering roller having a minute concave portions for accommodating the uniformly arranged by ink on its peripheral surface, the upstream side of the periphery of the metering roller in the supply of ink An intermediate roller whose peripheral surface rotates in contact with a surface, and contacts a peripheral surface of the weighing roller downstream of a contact position with the intermediate roller and upstream of a contact position with the wearing roller. And a doctor means having means for selectively switching between a position to be separated from the peripheral surface, and a doctor board with the doctor means facing upward, the upper part and the front part being opened, the both side plates and the inclined base, Consisting of A peripheral surface is provided at a position for closing the front portion of the ink fountain, and at a position close to the front edge of the base of the ink fountain via a first gap, and the peripheral surface is displaced downward. a fountain roller rotates, the adjusting means of the first gap provided in the first respectively adjustably ink fountain by sorting for each divided sections defined along the axial direction of said fountain roller gaps, supply of ink in close through a narrow second gap than the first gap in the peripheral surface of the downstream side of the fountain roller, and a peripheral surface you contact with the peripheral surface on the upstream side of the intermediate roller, the circumferential Unevenness evenly arranged on the surface
And a rotatable concave-convex roller having: a first gap that is fully opened while the first gap is fully opened, a doctor unit is brought into contact with a peripheral surface of the measuring roller, and the first gap that is drawn by the rotation of the fountain roller is provided. Is supplied to the peripheral surface of the concavo-convex roller while being pressed when passing through the second gap, and the contact between the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller. The fluidity increases due to pressure and splitting caused by the contact between the peripheral surface of the roller and the peripheral surface of the measuring roller, and the fluid is supplied to the peripheral surface of the measuring roller. While being scraped back by the contacted doctor means and returned to the ink fountain, a substantially uniform amount of ink is applied at all positions along the axis of the measuring roller, and is applied via the peripheral surface of the roller. A full ink supply to the printing plate of the cylinder, the first gap being adjusted to a required size for each divided section by the adjusting means, the doctor means being separated from the peripheral surface of the measuring roller, and a fountain roller The ink drawn out from the ink fountain at a desired thickness for each section by the rotation of the ink is supplied to the peripheral surface of the uneven roller by an amount corresponding to the thickness of the ink for each section when passing through the second gap. In addition, the fluidity increases due to pressure and splitting due to the contact between the peripheral surface of the uneven roller and the peripheral surface of the intermediate roller and the contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller, and the liquid is supplied to the peripheral surface of the measuring roller. And a piecewise ink supply for supplying the ink supplied to the peripheral surface of the measuring roller to the printing plate of the plate cylinder via the peripheral surface of the applying roller. It is able to select Nki supply, the ink supply device according to claim. 10. The ink supply device according to claim 9, wherein the fine concave portion of the measuring roller comprises a regularly provided concave portion on the peripheral surface. 11. The ink supply device according to claim 9, wherein the fine concave portion of the measuring roller is formed by a hollow portion formed in the outer peripheral layer so as to be uniformly dispersed in the outer peripheral layer, and the hollow portion is opened on the peripheral surface. 12. The ink supply device according to claim 9, wherein the doctor means is a doctor blade. 13. The ink supply device according to claim 9, wherein the doctor means is a doctor bar. 14. The ink supply device according to claim 9, wherein the doctor means is a doctor roller which rotates at a peripheral speed lower than that of the measuring roller. 15. The ink supply apparatus according to claim 9, wherein the doctor means is a doctor roller which rotates in a direction opposite to the displacement of the peripheral surface of the measuring roller at a contact portion with the measuring roller. 16. The ink supply device according to claim 9, wherein the unevenness of the uneven roller is composed of a large number of regular projections whose periphery is separated by grooves. 17. A printing press for supplying ink to a printing plate of a plate cylinder for printing, wherein a forming roller having a peripheral surface rotating in contact with the printing plate; a peripheral surface in contact with the surface, a number of rotatable metering roller having a minute concave portions for accommodating the uniformly arranged by ink on its peripheral surface, the upstream side of the periphery of the metering roller in the supply of ink An intermediate roller whose peripheral surface rotates in contact with a surface, and contacts a peripheral surface of the weighing roller downstream of a contact position with the intermediate roller and upstream of a contact position with the wearing roller. A doctor roller equipped with a means for selectively switching between rotation for scraping ink and rotation for not scraping ink from the peripheral surface of the measuring roller, and opening the upper and front parts with the doctor roller facing upward. An ink fountain formed of both side plates and an inclined base, a position for closing a front portion of the ink fountain, and a position close to a front edge of the base of the ink fountain via a first gap. provided, the circumferential surface thereof is provided with fountain roller rotates displaced downward, the first respective adjustable ink fountain by sorting for each divided sections defined along the axial direction of said fountain roller clearance (1) a gap adjusting means; and (2) a method of supplying ink, which is close to a downstream circumferential surface of the fountain roller via a second gap narrower than the first gap, and which is located upstream of the intermediate roller. a peripheral surface in contact with the surface, also concave and convex, which are uniformly arranged on the circumference
And a concavo-convex roller rotatable with Tsu, together to fully open the first gap, switched to the rotating scraping the ink doctor roller from the circumferential surface of the metering roller, drawn by the rotation of the fountain roller Ink having a thickness corresponding to the fully opened first gap is supplied to the peripheral surface of the concavo-convex roller while being pressed when passing through the second gap, and the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller. The fluidity increases due to pressure and splitting caused by the contact with the surface and the contact between the peripheral surface of the intermediate roller and the peripheral surface of the measuring roller, and the fluid is supplied to the peripheral surface of the measuring roller. , While scraping the ink from the circumference of the measuring roller with a rotating doctor roller and returning it to the ink fountain, And supplying the substantially uniform amount of ink to the printing plate of the plate cylinder via the peripheral surface of the setting roller, and adjusting the first gap to a required size for each division by the adjusting means. At the same time, the doctor means is switched so as to rotate so as not to scrape the ink from the peripheral surface of the measuring roller, and the ink drawn out from the ink fountain by the rotation of the fountain roller at a desired thickness for each section is passed through the second gap. Is supplied to the peripheral surface of the concavo-convex roller by the amount corresponding to the thickness of the ink for each section when passing through, and the contact between the peripheral surface of the concavo-convex roller and the peripheral surface of the intermediate roller and the peripheral surface of the intermediate roller. The fluidity increases due to pressure and division caused by contact with the peripheral surface of the measuring roller, and the liquid is supplied to the peripheral surface of the measuring roller. Piecewise ink that increases fluidity by applying pressure and splitting external force by the peripheral surface of the doctor roller that rotates without scraping, and supplies the ink to the plate of the plate cylinder through the peripheral surface of the roller. An ink supply device, wherein either one of the ink supply and the ink supply can be selected. 18. The ink supply device according to claim 17, wherein the fine concave portion of the measuring roller is formed of a regularly provided concave portion on the peripheral surface. 19. The ink supply device according to claim 17, wherein the fine concave portion of the measuring roller is a hollow portion formed by uniformly dispersing the outer peripheral layer and having a hollow opening on the peripheral surface. 20. The ink supply device according to claim 17, wherein the rotation of the doctor roller when the ink is not scraped off from the peripheral surface of the measuring roller is a co-rotating rotation caused by a contact friction force with the measuring roller. 21. The rotation of the doctor roller when the ink is not scraped off from the peripheral surface of the measuring roller is the same peripheral speed as the peripheral speed of the measuring roller, and the peripheral surface of the measuring roller is in contact with the measuring roller. 18. The ink supply device according to claim 17, wherein the rotation is a drive rotation that rotates while being displaced in the same direction as the displacement of the peripheral surface of the ink. 22. The ink supply device according to claim 17, wherein rotation of the doctor roller when scraping ink from the peripheral surface of the measuring roller is driving rotation at a peripheral speed lower than that of the measuring roller. 23. Rotation of the definitive doctor roller when scraping ink from the peripheral surface of the metering roller, at the contact portion with the metering roller, the peripheral surface rotates displaced to the displacement in the opposite direction from the peripheral surface of the metering roller 18. The ink supply device according to claim 17, wherein the ink supply device is driven to rotate. 24. The ink supply device according to claim 17, wherein the unevenness of the uneven roller is composed of a large number of regular projections whose periphery is separated by grooves.