JPS633749B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism for adjusting the amount of ink supplied in a printing press.

The ink amount adjustment mechanism in conventional printing presses uses a thick steel plate for the ink knife, so when pressed with the ink knife adjustment screw, there are parts that do not require ink supply, and parts that do require ink supply. The slope between the point and the point is long,
This resulted in poor ink coating on the ink fountain roller, which also caused defective printing.

The present invention was developed to eliminate such defects, and the tip of the ink knife to which the ink knife mounting plate is fixed is pressed by an ink supply amount fine adjustment screw mechanism that adjusts the ink supply amount. The ink supply adjustment mechanism for adjusting and supplying ink to the ink fountain roller consists of an ink knife made of a somewhat thinner steel plate and a steel plate thicker than the ink knife cut to the same width. A plurality of ink knife guide plates are provided,
The ink knife guide plates are removably joined to the ink knife at equal intervals, and the ink supply amount fine adjustment screw mechanism provided corresponding to the ink knife guide plates allows the ink to be injected into By pressing the ink knife through the knife guide plate and adjusting the amount of pressure to adjust the amount of ink supplied to the ink fountain roller, the inclination distance between the areas where ink supply is necessary and the areas where ink is not required can be adjusted. The purpose of this invention is to provide an ink supply amount adjustment mechanism for a shorter printing press.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 3 show a conventionally known ink supply amount adjusting mechanism, and FIG. 1 shows a mechanism in which a notch is formed in the ink knife, which is the main part of the mechanism. 1 is an ink supply amount adjusting tool used in the conventional mechanism. Several adjustment screw operation knobs 2 to which ink knife adjustment screws 3 are connected are attached to the ink supply amount adjustment tool 1. 4 is a rotation stopper for the ink knife adjustment screw 3, and 5 is a spring for the adjustment screw operating knob 2. Reference numeral 6 designates an ink knife for adjusting the supply of ink 11 put into the ink fountain 10, and is fastened to the ink fountain frame 8 via an ink knife mounting plate 7 with bolts 9. 12 is an ink fountain roller, and the ink 11 in the ink fountain 10 is moved by the ink knife 6 via the adjustment screw operating knob 2.
Adjustment supply is becoming available. The ink knife 6 has triangular notches 13 formed at equal intervals, as shown in FIG.

Furthermore, the relationship between the adjustment screw operating knob 2 of the ink supply amount adjusting tool 1 and the ink knife adjustment screw 3 will be explained in detail with reference to FIGS. The ink supply amount adjusting tool 1 has an adjusting screw operating knob 2 and an ink knife adjusting screw 3 screwed together on both sides of an ink fountain frame 8. In this case, the thread pitch of the ink knife adjusting screw 3 is molded to be slightly smaller than that of the adjusting screw operating knob 2 (normally, the thread pitch of the adjusting screw operating knob 2 is about 2 mm, and the thread pitch of the ink knife adjusting screw 3 is about 1.5 mm. ) has been done. Figure C shows this screwed state.

As is clear from the cross-sectional view shown in Figure C,
When the adjustment screw operation knob 2 is rotated (clockwise) in this state, the difference in screw pitch between the adjustment screw operation knob 2 and the ink knife adjustment screw 3 is changed via the threaded part of the ink fountain frame 8.
The ink knife adjusting screw 3 is moved in the direction of the ink knife 6 while being pulled back. In other words, there is a gap of 0.5 mm between the screw pitch of adjustment screw operation knob 2 and the screw pitch of ink knife adjustment screw 3.
Since there is a difference in pitch, the ink knife adjustment screw 3 is pulled back by that amount, and the amount of movement of the ink knife adjustment screw 3 becomes very small. the result,
By rotating the adjusting screw operating knob 2, the ink knife 6 can be finely adjusted via the ink knife adjusting screw 3.

Next, to explain the effects of the conventional mechanism in detail, first, the tip of the ink knife 6 is adjusted by the ink knife adjustment screw 3 via the adjustment screw operation knob 2, and a desired supply amount A is set in advance.
Next, the ink knife adjustment screw 3 is pressed through the adjustment screw operation knob 2 to a location where the ink 11 does not need to be supplied, so that the ink knife 6 is brought into close contact with the ink fountain roller 12. Then, the unnecessary part B of the ink 11 as shown in FIG. 2 is completely brought into close contact with the ink fountain roller 12 by the ink knife 6. At this time, since the notches 13 are formed at equal intervals, the central part between the ink knife adjustment screws 3 is bent inward, and the slope C is shortened. Therefore, the distance between the areas that require the supply of ink 11 and the areas that do not need to be supplied becomes narrower.

In this conventional mechanism, the ink knife 6 is provided with equally spaced notches 13, and the notches 13 cannot be completely bent by pressing the ink knife adjustment screw 3. Not only is it difficult to maintain a good supply of the notches 11, but the notches 13 become soft and may be worn out or cut off after many years of use. the result,
There were many defects such as difficulty or impossibility in attaching and detaching the ink knife 6.

Further, FIG. 3 is also based on another known mechanism, and as is clear from this figure, since the ink knife 6 is made of a thick steel plate, even if the adjustment screw operation knob 3 is pressed, the inclined surface of the ink knife 6 C becomes long, and as a result, the distance C between the point A where the supply of ink 11 is necessary and the point B where it is not necessary becomes long, resulting in defective printing.

FIG. 2 shows the ink supply amount adjusting mechanism in the printing press of the present invention, and 14 is a guide plate for the ink knife 6. In FIG. Ink knife guide plate 14
is fixed to an ink knife guide mounting plate 16 via an ink knife press 15. In this case, the ink knife guide plate 14 is constructed of a plurality of single plates made of a steel plate thicker than the ink knife 6 and cut to the same width, as shown in FIG.
The ink knife guide plate 14 and the ink knife 6 are joined together with a magic tape (not shown) interposed therebetween. On the other hand, when removing the ink knife guide plate 14 from the ink knife 6,
It can be easily removed by peeling off the magic tape. That is, if the ink knife guide plates 14 made of several single plates are joined to one side of the ink knife 6 at equal intervals, each guide plate 14 can be attached to the ink knife 6 in a continuous manner. An appropriate amount of ink can be supplied, and ink supply to areas where ink supply is not required can be completely and reliably stopped. In addition,
In this embodiment, a magic tape is used as a means for joining the ink knife guide plate 14 and the ink knife 6, but in addition to this, for example, each guide plate 14 may be attached with a magnetic force so that it can be attached and detached. , any joining means may be used. Furthermore, the ink knife 6 is made of a thin steel plate instead of the conventional thick steel plate, and the mounting portion is made even thinner as shown in FIG.

Next, to explain the function and effect of this mechanism in detail, first, as with the conventional mechanism shown in FIG. As shown in FIG. 2, an inclined surface C is formed between a portion B where ink 11 is not required to be supplied and a portion A where it is necessary. At this time, the ink knife guide plate 14 separates from the ink knife 6, and the ink knife guide plate 14, which is made up of two veneers and is pressed against the part B, is pressed deeper than the other veneers. Become. As a result, the ink knife 6 at the position of the pressed part (length of part B) of the two veneers (length of part B) of the two veneers on both sides (length of part C, C)
An inclined surface C is formed on the surface. in this case,
Ink will adhere to the ink fountain roller 12 in the C portion, but no ink will adhere to the ink fountain roller 12 in the B portion. Furthermore, since the conventional ink knife 6 is made of a thick steel plate and is configured to press a single plate, the part C has a long and smooth slope as shown in FIG. It's getting old. On the other hand, the ink knife 6 of the present invention is made of a thin steel plate as described above, and the ink knife guide plate 14 made of a thick steel plate is cut to the same width and is further provided with equally spaced gaps. Since it is configured to be pressed while joining, the C part is shortened as shown in Figure 2 B, and the B part and C part are shortened.
The slope is also steep because there is a step between the two parts. Therefore, in the present invention, the separation between the surface to which ink is adhered and the surface to which ink is not adhered is made clearer than in the conventional method, so that the surface to be printed and the surface not to be printed are clearly marked, and the printing effect is improved. is enhanced. In this embodiment, the case where two ink knife guide plates 14 are pressed (portion B) is shown, but even when there is only one sheet of the ink knife guide plate 14 or when a place other than the portion B is pressed, The same effect can be obtained.

In this way, the ink knife guide plates 14 are pressed against the entire surface of the ink knife 6 with some space between them, and the ink knife guide plates 14 are evenly pressed through the ink knife adjustment screws 3. Therefore, the ink knife 6 can be pressed by the ink fountain roller 12 in a preferable state.
In addition, the ink knife 6 according to the present invention is thinner than the conventional ink knife 6, and the ink knife guide plate 14 made of a thick single plate is used. Even when the ink knife 6 is pressed through the plate 14, the portion C is not pulled toward the ink fountain roller 12 together with the portion B. The ink knife 6 and the ink knife guide plate 14 are pressed into the ink knife 15 as shown in FIG. .

Also. Ink knife 6 and ink knife guide plate 1
Since the ink knife guide plate 4 is separated from the ink knife guide plate 14, the ink knife guide plate 14 can be freely attached and detached, making the replacement work simple and easy.

Since the present invention is configured as described above, not only the ink supply adjustment is improved and the printing effect is improved, but also the fine adjustment that was previously considered impossible is possible.Moreover, the mechanism itself is simple and the operation surface is easy to use. Since it is simple and convenient, it has good performance, economical efficiency,
It is possible to provide a novel and unique ink supply adjustment mechanism for a printing press that is excellent in all aspects including practicality.

[Brief explanation of the drawing]

1 and 3 are schematic explanatory diagrams showing a conventionally known ink supply amount adjusting mechanism, and FIG. 2 is a schematic explanatory diagram showing an ink supply amount adjusting mechanism of the present invention. 1...Ink supply amount adjustment tool, 2...Adjustment screw operation knob, 3...Ink knife adjustment screw, 4...
Rotation stopper, 5... Spring, 6... Ink knife, 7... Ink knife mounting plate, 8... Ink fountain frame, 9... Bolt, 10... Ink fountain, 11... Ink, 12... Ink fountain Roller, 13... Notch, 14... Ink knife guide plate, 15... Ink knife presser, 16... Ink knife guide mounting plate.

Claims (1)

[Claims] 1. An ink supply amount adjustment mechanism that adjusts and supplies ink to the ink fountain roller by pressing the tip of the ink knife to which the ink knife mounting plate is fixed using an ink supply amount fine adjustment screw mechanism that adjusts the ink supply amount. An ink knife made of a somewhat thinner steel plate and a plurality of ink knife guide plates made of a steel plate thicker than the ink knife and cut to the same width are provided, and the ink knife guide plates are used to ink the ink. The ink supply amount fine adjustment screw mechanism is connected to the knife at regular intervals and removably, and is provided corresponding to the ink knife guide plate, so that the ink is supplied through the ink knife guide plate. An ink supply amount adjusting mechanism for a printing press, characterized in that the ink supply amount of an ink fountain roller is adjusted by pressing a knife and adjusting the amount of pressure.