JPS6399949A - Ink regulating device of printer - Google Patents

Abstract

PURPOSE:To avoid permeation of ink into between an ink knife and a lower support and prevent formation of an hardened ink layer by providing a blocking part which protrudes downward and prevents creeping of ink. CONSTITUTION:A downward-protruding ink-creeping blocking part 7 is provided on the inner side of an ink knife 2 which is a reverse side of said knife 2. Speaking in detail, a U-shape part 7b which for instance consists of urethane rubber, is fixed to the ink knife 2 and the tip of a lower support 6 through an adhesive to form an ink-creeping blocking part 7. Further an ink regulating screw 1 is arranged on the rear of the blocking part. As an alternative, one end of a plate-like part 7c is fixed to the rear surface of an edge of the ink knife 2, through, for instance, a double-coated adhesive tape, and the other end of the plate-like part 7c is set along the surface of an ink receptacle 16 to form an ink creeping blocking part 7. Thus ink on the ink knife 2 is prevented from penetrating into the space between the ink knife 2 and lower support 6, and also is prevented from the formation of a hardened ink layer which adversely affects screw adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ink adjustment device for a printing press that is capable of adjusting the distance between an ink knife and an ink fountain roller.

(Prior Art) This type of ink adjusting device is configured such that a plurality of ink adjusting screws are provided below the ink knife, and the distance between the ink knife and the ink fountain roller is adjusted by the adjusting screws. In addition, in 1985, the above-mentioned spacing adjustment work using an ink adjustment screw, which had conventionally relied on intuition and skill, was improved.
The invention described in Publication No. 029 provides a certain degree of repeatability, certainty and ease of adjustment. This invention, as shown in FIGS. 8 and 9, includes a plurality of ink adjustment screws 1.
1 is provided below the ink knife 2 to make it possible to adjust the distance t between the ink knife 2 and the ink fountain roller 3. It was constructed by providing a scale of 5.5 on each outer surface of the cylinder 4.

According to this invention, it is true that ink adjustment, which conventionally required intuition and skill, can now be done simply and easily by a series of operations such as checking the position of the scale, recording, and alignment. It now has the advantage of However, since adjusting the position of the ink knife using the ink adjustment screw is usually done by turning each adjustment screw several times, in the alignment using the scale of this invention, it is difficult to adjust the position of the ink knife using the currently displayed scale. At first glance, it was unclear whether it was a real thing or not, so a method had to be taken to separately record the number of rotations. Furthermore, since dozens of adjustment screws are installed for each printing machine, it is complicated to collect data for positioning using the scale. Moreover, due to the sliding contact between the ink knife and the roller, these become slightly worn, and as a result, the data that has been collected has to be changed.
This type of scale alignment is not suitable for practical use.

Therefore, the present inventor first devised a device for reading the protrusion and retraction stroke of a rotary screw, and proposed implementing this device into the above-mentioned adjustment device. As shown in Fig. 1O and Fig. 11, a knob 14 is attached to the base end of the ink adjustment screw l, and each ink adjustment screw l is rotated by turning the knob 14. In this case, the rotation of the ink adjustment screw 1 is displayed by an indicator 9 on the window 12a of the case 12. That is, in this example, it is represented by numbers.

Further, since the case 12 is configured to move in and out following the screw l, the support plate 13 is formed with a through hole 13a, and the case 12 is provided with a pin 12b that loosely fits into the through hole.
is formed. Note that the support plate 13 is attached to the fixed base lO at locations not shown. As a result, the case 2 does not rotate when the screw l rotates.
It moves in and out together with the screw.

In this way, by reading the reading index, it is possible to uniformly grasp the rotational position of the ink adjustment screw l over its entire rotation range, and it is possible to know how many rotations the ink adjustment device with a scale is rotating. However, by checking the index, it was possible to determine the rotational position just by checking the index.

(Problem to be solved by the invention) Unlike the conventional spacing adjustment work using an ink adjustment screw, which relied on intuition and skill, this method provides a certain degree of repeatability and certainty of adjustment, which was previously unnoticeable. The following points have become a problem.

That is, as shown in FIG. 12, in this type of ink adjusting device, a space is provided between the ink knife 2 and the ink fountain roller 3, so that the ink on the ink knife 2 is mixed with the ink knife 2. The ink went around from the edge to the back surface and then entered between the ink knife 2 and the lower support plate 6, solidifying within a few days to a few weeks to form a solidified ink layer. In addition, if the ink knife shown in FIG. 9 is lowered considerably, the ink knife will enter between the ink knife and the lower support plate from the side of the ink knife rather than from the tip, and as described above, a number of Some of the ink would solidify within a few weeks. In this case, it is possible to wipe off the ink that has entered, but since the relevant part is the back side of the ink knife between the ink knife and the lower support plate, the wiping operation will instead push the ink towards the lower support plate. There were many things that happened.

When the ink solidifies, it goes without saying that it becomes difficult to adjust the ink knife spacing, but with the above-mentioned idea, it is possible to read the rotational position of the ink adjustment screw and collect data based on this. If a certain repeatability and adjustment reliability are intended, the ink solidification layer has the disadvantage of acting as an error in the data.

(Means for Solving the Problems) The present invention has been made in view of the above circumstances, and an object of the present invention is to eliminate the above drawbacks.

That is, firstly, the present invention provides an ink adjustment device for a printing press in which a plurality of ink adjustment screws are provided below the ink knife to enable adjustment of the distance between the ink knife and the ink fountain roller. A downwardly protruding ink wrap-around prevention part is provided on the inner side of the edge of the knife, and a plurality of ink adjusting screws are provided below the ink knife so that the ink knife and the ink fountain roller can be adjusted. In this ink adjusting device for a printing press, which is equipped with an ink receiver below the ink fountain roller 3, it is possible to adjust the spacing between the ink knife and the ink knife. along the surface of the ink receiver to form an ink wrap-around prevention section. With this configuration, the ink on the ink knife is prevented from entering between the ink knife and the lower support plate, thereby preventing the formation of a solidified ink layer that would adversely affect the thickness adjustment.

(Example) The present invention will be explained below based on illustrated embodiments.

In FIG. 1, the ink adjusting device shown in this example is provided with a plurality of ink adjusting screws 1.1 below the ink knife 2, like the conventional one, and the ink knife 2 and the ink fountain roller are controlled by the adjusting screws. 3 (see FIG. 9).Furthermore, the present invention includes an ink wrap-around prevention portion that projects downward on the back side of the ink knife 2 and inside the edge of the knife 2. It is constructed by providing a f.

In this embodiment, the ink wrap-around prevention portions 7 are provided at both the tip and side ends of the ink knife 2. Since this blocking portion 7 is to prevent ink from going around to the lower support plate 6, it is provided at the end of the ink knife 2 on the side where it is necessary to prevent ink from going around, between it and the lower support plate 6. There is. In addition, when it is necessary to provide the blocking part 7 at the side edge of the ink knife 2 and the lower support plate 6 protrudes near the side edge of the ink knife 2,
It is preferable to cut out a portion of the lower support plate 6 in that area.

The ink wraparound prevention portion 7 is formed by an ink knife 2.
In contrast, materials with low rigidity are used, such as urethane, synthetic rubber, and other soft plastics. In this way, the ink-adjusting screw l is used to form the ink-wrapping prevention portion 7 from a material that is less rigid than the ink knife 2.

The purpose is to easily follow the deformation of the ink knife 2 due to the deformation of the ink knife 2 due to the formation of the ink knife 2, and conversely, due to the presence of the blocking portion 7, the portion forming member F expands and contracts under the influence of temperature and humidity, and the ink is adjusted. This is to avoid interfering with the adjustment (normal deformation) of the ink knife 2 by the screw 1.1.

This ink wrap-around prevention part may be provided by any suitable means, and in the embodiment, it is attached to the back surface of the ink knife 2 by adhesive.

Further, the shape of the forming member 7a of the ink wrap-around prevention part may be any shape, for example, as shown in FIG. Any other appropriate shape can be used, such as a shape that gradually becomes thinner (FIG. 2b) or a semispherical shape (FIG. 2C).

By the way, the ink adjustment screw l is set so that the tip of the screw l comes into contact with the tip of the ink knife 2, in the sense that the inclination angle of the ink knife 2 can be finely adjusted. This is preferable in the sense that deformation of No. 2 can be prevented, and as in the above embodiment,
If the forming member 7a of the wrap-around prevention portion 7 is bonded or the like, the tip abutment position of the ink adjusting screw 1 will inevitably retreat from the tip of the ink knife 2.

The embodiments shown in FIGS. 3 to 5 solve this problem.

Specifically, as shown in FIG.
And adhesive (numeral 15 in FIG. 4) is applied to the tip of the lower support plate 6.
), a U-shaped member 7b made of urethane rubber or the like is fixed to form the ink wrap-around prevention part 7, and an ink adjustment screw l is arranged on the back side of the prevention part. Of course, the present invention is also applicable to the ink adjustment screw l provided obliquely as shown in FIG.

Although it is convenient to use double-sided adhesive tape to fix the U-shaped object 7b, various conventional techniques can be used for this fixing means.

Next, the second invention will be explained.

In recent years, it has become common for printing presses to have an ink receiver 16 disposed below the ink fountain roller 3, and one end of the ink receiver 16 is generally fixed to a lower support plate 6 made of cast iron. The structure is as follows. For such a printing machine, as shown in FIG. It is preferable that the other end of 7c be arranged along the surface of the ink receiver 16 to form the ink rotation prevention part 7.

That is, there is a problem in that adhesion to castings is easy to peel off, so by guiding the plate-like object 7c to the ink receiver 16, the lower part of the plate-like object 7c does not need to be adhered to the support plate 6, and moreover, the ink can be removed easily. There is an advantage that the ink does not wrap around the back side of the ink knife 2, which solves the above problem.

In addition, the other end side of the plate-like object 7c is
It may be fixed to the surface of the ink receiver 16 using double-sided adhesive tape or the like, or it may be held down by a rod 17 as shown in FIG.

(Effects of the Invention) As explained above, in the case of the first JA Ming, the present invention provides printing in which a plurality of ink adjustment screws are provided below the ink knife to enable adjustment of the distance between the ink knife and the ink fountain roller. In the ink adjustment device of the machine, an ink wrap-around prevention part that protrudes downward is provided on the back side of the ink knife and inside the edge of the knife, so that the ink on the ink knife is removed from the edge of the ink knife. Even if the ink slides around to the back side, the downwardly projecting member prevents the ink knife from entering between the ink knife and the lower support plate, thereby preventing the formation of a solidified ink layer that would adversely affect screw adjustment. If the ink rotation prevention part is formed by attaching a U-shaped or curving-shaped object to the edge of the ink knife, the ink adjustment screw should be attached directly to the back of the U-shaped object, etc. The inclination angle of the ink knife can be finely adjusted, and a moving plate is added to prevent the ink knife from deforming.

Further, the second invention is such that the plate-shaped object forming the blocking portion is guided from the back side of the edge of the ink knife to the surface of the ink receiver, and is suitable for many printing machines having an ink receiver. It has the advantage of being applicable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the ink knife and the lower support plate, and Fig. 2 is a longitudinal sectional side view of the same.
Figure 3 shows an example in which a U-shaped member is used as the forming member for the ink wrap-around prevention part, Figure 4 is an enlarged view of the main part in Figure 3, and Figure 5 shows an ink adjustment screw installed at an angle. FIG. 6 is a sectional view showing an embodiment of the second invention, FIG. 7 is a sectional view showing an embodiment of the ink adjustment device, and FIG. A vertical cross-sectional view showing the locations of the knife, ink adjustment screw, and ink fountain roller; FIG. 9 is a perspective view of the same state in which the above is in use; FIG. 1
FIG. 1 is a partially cutaway side view showing the state of engagement between the case and the support plate, and FIG. 12 is a longitudinal sectional view showing the locations of the ink knife, ink adjustment screw, and ink fountain roller. l...Screw 2...Ink knife 3...Ink fountain roller 6...Lower support plate 7
... Ink wraparound prevention part 7a ... Forming member 7b
... U-shaped object 7c... Plate-shaped object patent applicant Ko Muraoka - Agent
Patent Attorney Tadashi Mori Tube Manufacturing 1 Figure 3 Figure 4 Figure 8 Figure 9 Figure 12

Claims (6)

[Claims] (1) In an ink adjustment device for a printing press in which a plurality of ink adjustment screws 1, 1, ... are provided below the ink knife 2 to enable adjustment of the distance between the ink knife 2 and the ink fountain roller 3, An ink adjustment device for a printing press, characterized in that an ink wrap-around prevention part 7 that projects downward is provided on the back surface of the ink knife 2 and inside the edge of the knife 2. (2) The ink wrap-around prevention part 7 is provided at the tip of the ink knife 2.
An ink adjustment device for a printing press as described in Section 1. (3) The ink wrap-around prevention portion 7 is provided at the side end portion of the ink knife 2.
An ink adjustment device for a printing press as described in Section 1. (4) The ink adjustment device for a printing press according to claim 1, wherein the ink wrap-around prevention portion 7 is provided by bonding a forming member 7a to the back surface of the ink knife 2. (5) The ink adjustment device for a printing press according to claim 1, wherein the ink wrap-around prevention portion 7 is provided by attaching a U-shaped member 7b to the edge of the ink knife 2. (6) An ink adjustment device for a printing press in which a plurality of ink adjustment screws 1, 1, . In a device equipped with an ink receiver 16 below the fountain roller 3, one end of the plate-like object 7c is fixed to the back side of the edge of the ink knife 2, and the other end is placed along the surface of the ink receiver 16 to prevent ink from going around. An ink adjustment device for a printing press, characterized in that a section 7 is provided.