JP3408669B2 - Portable ink supply device for printing press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable ink supply device applied to a wide range ink fountain type printing machine when a narrow range is specified for printing.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS.

Conventionally, in the case of printing only in a narrow range with a wide ink fountain type printing press, for example, spot color printing is performed for one page by passing a 4-page width paper through a double-width newspaper offset rotary press. In such a case, a system using a partition plate or an ink tray has been used.

The partition plate system shown in FIGS. 6 and 7 has been generally used in the past. The position in the ink fountain which corresponds to a page of spot color printing is partitioned by two partition plates, and the partition plate is divided. The ink was printed only in the enclosure.

The partition plate 6 is a lead plate formed so as to come into contact with the surface of the doctor blade 2 forming the inclined bottom of the ink fountain and the outer circumference of the ink source roller 1.

In a doctor blade 2 which is generally used in recent years, a large number of strip-shaped split blades 2a are arranged flush with each other in a state of being in contact with each other, and the tops of the split blades 2a are pivotally attached to a pedestal 3. A doctor blade width direction adjusting device 40 is provided below the doctor blade 2 so that the gap between the tip of each divided blade 2a and the ink source roller 1 can be adjusted.

When printing is performed only within a certain range by the partition plate method, the printing range is partitioned by the two partition plates 6 and 6 in the ink fountain, and the ink is put only inside the partition. Then, the adjustment shaft 42 of the width direction adjusting device 40 is rotated according to the pattern on the plate surface, the gap between the tip of each divided blade 2a and the ink source roller 1 is adjusted via the operating piece 45, and the width supplied from the ink fountain. Printing was performed by adjusting the thickness of the ink film in the direction.

Further, when changing colors or cleaning after printing,
The ink remaining in the ink fountain is taken out, and then, as shown by the alternate long and short dash line in FIG. 7, the receiving tray 3 is swung in the direction of the arrow to separate the ink fountain from the ink source roller 1, and the surface of the doctor blade 2 is directed upward. , The ink adhering to the surface was wiped clean.

The ink tray system shown in FIGS. 8 and 9 has been recently developed, and a tray containing ink is installed in an ink fountain corresponding to a page of spot color printing for printing. there were.

This ink tray 30 is formed on a front surface of a pyramid formed by a bottom plate 32 which is in close contact with the surface of the doctor blade 2 which constitutes an inclined bottom of the ink fountain and both side plates 31 which come into contact with the outer circumference of the ink source roller 1. An opening is provided for the ink to flow out, and a shutter 36 that moves up and down along the outer circumference of the ink source roller 1 is attached to this opening.

The doctor blade 2 in contact with the lower surface of the bottom plate 32 of this ink tray and the doctor blade width direction adjusting device 40 below the doctor blade 2 are the same as those of the partition plate system shown in FIGS. 6 and 7. is there.

When printing with this ink tray system, the shutter 30 is closed and the tray 30 containing ink is placed.
Is set on the upper surface of the doctor blade 2 of the ink fountain at the position corresponding to the page of spot color printing. Then, the shutter 36 is opened to remove the ink in the tray from the ink source roller 1.
Is supplied to the outer peripheral surface, and the adjusting shaft 42 of the width direction adjusting device 40 is rotated according to the pattern on the plate surface, and the gap between the tip of each divided blade 2a and the ink source roller 1 is adjusted via the operating piece 5. Printing was performed by adjusting the thickness of the ink film in the width direction supplied from the ink fountain.

Further, when changing colors or cleaning after printing,
The shutter was closed, the ink tray was removed, and the ink adhering to the tip of the doctor blade 2 in the ink fountain and its surroundings was wiped off.

[0014]

As described above, when printing with a wide range of ink fountain type printers only within a narrow range, both the partition plate type and the conventional ink tray type have the following problems. There was a point.

(B) In the partition plate method, at the time of cleaning after the color change or the printing operation is completed, the ink remaining inside the ink fountain surrounded by the partition plate is removed, and the partition plate leaks and diffuses. The work of wiping off the ink adhering to the surroundings is the work of dirt most disliked by workers, and requires a lot of time.

(B) In the conventional ink tray system, by removing the ink tray at the time of cleaning after the color change or the printing operation is finished, the remaining ink is removed from the work, but the bottom of the ink tray is rigid. Since there is no adjustment function for the ink supply amount in the width direction and the tip of the doctor blade of the ink fountain is adjusted according to the pattern on the plate, unevenness occurs on the surface of the doctor blade and there is a gap between it and the bottom plate of the ink tray. Occurs, and the ink enters the gap and adheres to the back surface of the bottom plate and the front surface of the doctor blade. For this reason, it was not possible to escape from the work of wiping off the adhered ink.

An object of the present invention is to solve these problems and to provide an ink supply device which eliminates the need for cleaning work at the time of color change or after the end of printing operation, and can perform color change work quickly.

[0018]

The present invention has been made to solve the above problems, and in an ink fountain type ink supply device of a printing press, an end portion extending in a direction intersecting with an axis line of an ink source roller is provided. The left and right side plates that come into contact with the outer circumference of the ink source roller, the opening portion provided with an opening / closing means on the front surface adjacent to the peripheral surface of the ink source roller, the attachment portion having the attachment / detachment means, and the elastic blade An ink tray is formed with the bottom having, and the ink tray is mounted on the doctor blade at a doctor blade rest position where the doctor blade is separated from the ink source roller, and the tip of the elastic blade is adjusted in the width direction of the doctor blade. We provide a portable ink supply device for a printing press that is operated by the machine and displaces the doctor blade when using the ink tray. Install the same ink tray at the position, adjust the ink supply amount by operating the tip of the blade of the ink tray with the width direction adjusting device according to the pattern on the plate surface, and remove the ink tray when printing is completed. It was designed to end.

Further, according to the present invention, a portable ink for a printing machine, wherein a tip of the blade of the elastic body is actuated by a doctor blade width direction adjusting device to be displaced through a lever provided at a lower portion of the ink tray. When adjusting the blade tip of the elastic body to adjust the ink supply amount according to the pattern on the plate surface by providing the supply device, the displacement of the doctor blade from the width direction adjusting device is changed by the lever to the elastic blade. I was told to.

Further, the present invention provides a portable ink supply device for a printing machine, wherein the attachment / detachment means of the attachment portion of the ink tray is composed of a magnet, and simplifies the attachment form of the ink tray to the doctor blade. It is a measure.

Still further, according to the present invention, there is provided a zero point returning means in the doctor blade width direction adjusting device so that the tip of the blade of the ink tray is set to the zero point in contact with the ink source roller. Provided a portable ink supply device, in which the blade of the elastic body started from the zero point where the tip of the elastic blade came into contact with the ink source roller, and the ink supply amount was adjusted appropriately according to the pattern on the plate surface. Is.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
Or, it demonstrates based on FIG.

Incidentally, FIG. 6 showing the prior art described above.
Throughout the drawings, the same reference numerals are used for the portions that are basically common to those in FIG.

Also, in the first embodiment, the one-page width newspaper is applied to the ink fountain of the single-color printing unit of the four-page width newspaper offset rotary press.

Reference numeral 1 is an ink source roller, 2 is a doctor blade of an ink fountain, 3 is a pedestal for the doctor blade 2, 4
Reference numeral 0 is a device for adjusting the width of the doctor blade 2.

The doctor blade 2 forming the bottom of the ink fountain is separated from the contact position with the ink source roller 1 in the normal use state shown by the chain double-dashed line to the horizontal rest position shown by the solid line, and the doctor blade 2 is moved. The left and right side plates 11a, 1 which come into contact with the outer circumference of the ink source roller 1
1b and an opening 10a provided with an opening / closing means 16 on the front surface,
The ink tray 10 including the attaching portion 10b having the attaching / detaching means 17 on the rear portion and the bottom portion 10c having the elastic blade 13 is attached.

The tip of the elastic blade 13 is vertically displaced through the operating piece 5 attached to the width direction adjusting device 40 of the doctor blade 2 to adjust the ink supply amount. is there.

The opening / closing means 16 is a shutter inserted into the guide groove 11c along the outer circumference of the ink source roller 1 provided inside the side plates 11a and 11b, as shown by the arrow in FIG. The shutter is moved up and down to open and close the opening 10a of the ink tray.

The attaching / detaching means 17 is, as shown in FIG.
The magnet block is fixed to a mounting portion 10b at the rear of the ink tray 10.

A rear portion of a blade 13 made of spring steel is sewn on the surface of the bottom plate 12 constituting the bottom portion 10c of the ink tray, and the tip of this blade is pivotally attached to the case 41 of the doctor blade width direction adjusting device. The actuating piece 5 is elastically deformed and can be displaced vertically.

Further, the controller (not shown) of the doctor blade width direction adjusting device 40 is provided with a zero point returning means so that the drive motors 43 of the adjusting shaft 42 for rotating the actuating piece 5 rotate in unison. A control circuit for contacting the tip of the blade 13 of the ink tray with the ink source roller 1 is provided.

When the portable ink supply device constructed as described above is used, the base 3 of the ink fountain is rotated and flipped up, the doctor blade 2 is separated from the ink source roller 1, and the surface thereof is leveled. Set to the rest position.

Then, the opening 10a is closed and the left and right side plates 11a and 11b of the ink tray containing the ink inside are put on the outer circumference of the ink source roller 1 corresponding to the printing position, and the mounting portion 10b of the ink tray is made horizontal. After placing and positioning on the upper surface of the doctor blade 2, the switching lever 17a of the magnet block of the mounting portion 10b
When you put it on, the magnetic force acts and the mounting part 10
b is adsorbed and fixed on the upper surface of the doctor blade 2.

Then, the tip of the blade 13 attached to the bottom plate 12 of the ink tray comes into contact with the top of the operating piece 5 of the width direction adjusting device 40 of the doctor blade 2.

At this time, when the zero-point returning means provided in the control device (not shown) of the width direction adjusting device 40 of the doctor blade 2 is operated, the motors 43 of the width direction adjusting device 40 are rotated in unison and the operating piece 5 is operated. The tip of the blade 13 of the ink tray is brought into contact with the ink source roller 1 through the, and the gap between the roller 1 and the blade 13 is set to zero, and a reference point for remote operation is secured.

Next, pull out the shutter of the ink tray,
While opening the opening 10a and supplying the ink in the ink tray to the surface of the ink source roller 1, the tip of the blade 13 of this tray is moved up and down through the operating piece 5 according to the pattern on the plate surface, Print operation is performed by adjusting the ink supply amount in the specified direction.

When changing colors or cleaning after the printing operation is completed, a shutter is put in the groove 10c of the tray to open the opening 1.
Close 0a. When the switching lever 17a of the magnet block of the mounting portion 10b is "disengaged", the magnetic force disappears and the ink tray 10 can be removed from the doctor blade 2.

After removing the ink tray, it is only necessary to remove the ink adhering to the surface of the ink source roller 1. When changing colors, the ink tray 10 containing another color ink may be replaced.

When the ink tray 10 is left attached to the upper surface of the doctor blade 2 of the ink fountain after printing, or when the ink remaining in the tray is stored as it is, By covering the upper surface of the ink tray 10 with the lid 18, the ink in this tray is shielded from the outside air, and dust can be prevented from entering.

A second embodiment of the present invention will be described with reference to FIGS. 4 and 5.

In this embodiment, the bottom portion 2 of the ink tray is used.
On the surface of the bottom plate 22 that constitutes 0c, the rear portion of the blade 23 made of spring steel is sewn on similarly to the first embodiment, but on the back surface of the bottom plate 22, both side plates 21a, 21b are attached.
Eight levers 24 are rotatably attached to a shaft 25 having both ends inserted therein at equal intervals. The tip of the lever 24 is adapted to vertically displace the blade 23 via an actuating piece 45 pivotally mounted on the doctor blade width direction adjusting device to adjust the ink supply amount.

Since the other structure is the same as that of the above-mentioned first embodiment, basically the same parts are designated by the same reference numerals and the duplicated description will be omitted.

When the portable ink supply device having the above-described second embodiment is used, the ink tray mounting portion 20b is used as in the case of the first embodiment. When the blade is attached to the upper surface of the doctor blade 2 in a horizontal state, the tip of the blade 23 attached to the bottom plate 22 of this ink tray has side plates 21a, 21
The back end of each lever 24 pivotally attached to b contacts the top of the operating piece 45 of the doctor blade width direction adjusting device, and the front end of each lever 24 contacts the tip of the blade 23.

Therefore, according to the design of the printing plate, the tip of the blade 23 is actuated by the lever 24 and the operating piece 45.
To move up and down to adjust the ink supply amount in the width direction and perform the printing motion. Other operations are as described in the first embodiment.

In the second embodiment, the tip of the blade 23 does not come into direct contact with the operating piece 45 but receives the movement of the operating piece 45 via the lever 24. By appropriately selecting the shape of the lever 24, the operating piece 45 attached to the width direction adjusting device used when the doctor blade 2 is in the normal operating position can be used as it is without replacement, and the basic structure of the device is obtained. It is not necessary to incorporate the work of changing and adjusting various parts, and the work of attaching and replacing the ink tray can be easily performed.

Further, in each of the above-mentioned embodiments, one ink tray of one page width of the present invention is installed on the doctor blade of the ink fountain of four page width, and spot color printing is performed only for one page. An example of single-sided operation is shown, but it is also possible to install two ink trays and perform spot color printing for two pages on a paper width of four pages and apply it to both-sided operation. is there.

Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various modifications may be made to the specific structure within the scope of the present invention.

[0048]

As described above, according to the present invention, the ink tray is mounted on the doctor blade in the rest position where the doctor blade is separated from the ink source roller so as to be in an operating state. As described above, it is not necessary to remove the ink remaining in the ink fountain at the end of color change or printing operation, nor to wipe the ink adhering to the surrounding area due to ink leakage.
Work time can be greatly reduced.

Also, unlike the conventional method in which the ink tray is placed directly on the doctor blade, the bottom of the ink tray of the present invention does not come into contact with the doctor blade of the ink fountain at all, so the ink supply amount in the width direction can be adjusted. Also, the ink does not adhere to the doctor blade, and when changing colors or cleaning after the printing operation is completed, it is only necessary to remove the ink tray, and there is no need to wipe the ink.
Therefore, it can be freed from dirty work and can greatly contribute to the improvement of the work environment.

According to the second aspect of the invention, the blade tip of the elastic member of the ink tray is not directly actuated by the doctor blade width direction adjusting device, but is actuated by a lever therebetween. Therefore, even if the arrangement and mutual shape of the doctor blade and its width direction adjusting device are unique due to the necessity of normal operation of the doctor blade, just by selecting the above-mentioned lever shape, it is immediately possible. It can be dealt with, and is extremely preferable in terms of operation and maintenance of the entire apparatus.

According to the third aspect of the invention, since the magnet is fixedly attached to the mounting portion of the ink tray, the main tray can be easily and quickly placed on the doctor blade of the ink fountain.
Moreover, since it can be firmly fixed, the ink tray does not move during operation, and stable printing can be performed. It can be removed very easily.

Further, according to the invention of claim 4, the width adjusting device for the doctor blade is provided with the zero-point returning means. Therefore, after the doctor blade is set in the rest position, the ink tray is mounted on the doctor blade. Since the blade tip of this tray can be immediately brought into contact with the ink source roller to secure the zero point, the ink supply amount in the width direction can be accurately adjusted by remote control, and high quality printing can be performed.

[Brief description of drawings]

FIG. 1 is a front layout view of a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part showing an operating state of FIG.

FIG. 4 is a front layout diagram of a second embodiment of the present invention.

5 is an enlarged cross-sectional view of an essential part showing the operating state of FIG.

FIG. 6 is a perspective view showing a conventional partition plate system.

FIG. 7 is an explanatory view of a conventional ink fountain.

FIG. 8 is a perspective view showing a conventional ink tray system.

9 is a vertical cross-sectional view of FIG.

[Explanation of symbols]

1 Ink source roller 2 Doctor blade 10, 20, 30 Ink tray 10a, 20a Opening part 10b, 20b Mounting part 11a, 11b, 21a, 21b, 31a, 31b Side plate 12, 23 Blade 24 Lever 24

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-234654 (JP, A) JP-A-6-328671 (JP, A) JP-A-6-55728 (JP, A) JP-A-6- 71861 (JP, A) JP-A-63-249655 (JP, A) Actually developed 4-100851 (JP, U) Actually developed 48-41303 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41F 31/02-31/04 B41F 31/30-31/38

Claims (4)

(57) [Claims] 1. In an ink fountain type ink supply device for a printing press, left and right side plates having their ends abutting the outer circumference of the ink source roller and extending in a direction intersecting the axis of the ink source roller, and the ink source roller of the same. An ink tray is formed by an opening portion provided with an opening / closing means on the front surface adjacent to the peripheral surface, a mounting portion having a detaching means, and a bottom portion having an elastic blade, and the doctor blade is separated from the ink source roller. A portable ink supply device for a printing machine, wherein the ink tray is mounted on the doctor blade at the rest position of the doctor blade, and the tip of the elastic blade is displaced by being actuated by a width direction adjusting device of the doctor blade. 2. The printing machine according to claim 1, wherein the tip of the blade of the elastic body is actuated and displaced by a width adjusting device of a doctor blade via a lever provided at a lower portion of the ink tray. Portable ink supply device. 3. The portable ink supply device for a printing machine according to claim 1, wherein the attachment / detachment means of the attachment portion of the ink tray is constituted by a magnet. 4. The doctor blade width direction adjusting device is provided with zero point returning means, and the tip of the blade of the ink tray is set to the zero point in contact with the ink source roller. A portable ink supply device for a printing machine according to item 1.