JPS58208086A - Plate cylinder for single cylinder type rotary miographic press - Google Patents

Abstract

PURPOSE:To obtain homogenous printed matter in uniform printing density, by supplying an ink between an outer cylinder having a structure exuding the ink to a surface side and an inner cylinder subjected to differential rotation with respect to said outer cylinder through a predetermined supply channel. CONSTITUTION:To the internal side of an outer cylinder 1 (a numeral 2 shows the shaft of a plate cylinder) consisting of a reticulated body 1a and a screen 1b trained around the outer periphery thereof, an inner cylinder 4 subjected to differential rotation with respect to the outer cylinder 1 is arranged so as to leave a predetermined ink gap 3 and an inking roller 6 is arranged in an ink supply channel 8 consisting of an ink supply channel anterior chamber 8a, squeegees 24a, 24b, a dispersing roller 25, narrow dispersing gaps 26, 26b, an ink supply rear chamber 8b and an ink trough 7 so as to leave a predetermined roller gap 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that a plate-making base paper is adhered to the entire plate cylinder, and ink that oozes out from inside the plate cylinder completely passes through the plate-making S of the base paper and appears on the surface.
All of the printing paper is fed between the plate cylinder and the impression cylinder, which are in close contact with each other, and the ink in the plate-making section is transferred to all the paper and printed.
This relates to a so-called mono-barrel two-wheel copying machine plate cylinder.

The plate cylinder of a conventional single-barrel rotary copying machine has a low ink injection into the shell of a hollow inner cylinder consisting only of an outer cylinder, and the ink is naturally absorbed by the capillary action of the screen and the red center force caused by the rotation during the number of eggs. Either the ink is leached onto the cylindrical surface or the outer cylinder, the inner cylindrical surface, and the ink in a predetermined radial direction.
An inner cylinder having a diameter ui is installed, and the ink inside is gradually flowed into the gap by centrifugal force through a large number of small holes formed on the outer circumferential surface of the inner cylinder. It was designed to cause ink to ooze out onto the outer circular surface by increasing pressure due to rotation.

In the former case, a small amount of ink is injected into a large-capacity cylindrical body and rotated, so the ink comes into contact with the air during hunting and is easily mixed, drying and deteriorating, and may leak onto the surface or become unusable. Yes, and rb against changes in physical properties of ink due to temperature changes.
There is no hand plate to compensate for this, for example, when the viscosity of the ink increases during cold weather, and it leaches to the outer periphery, or even when it reaches the first stage, there is no way to compensate for this.
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In the container, the inner and outer cylinders move differentially with each other, and the pressure increases in the ink gap between the ink cylinders, so that the ink leaches to the outside without being affected by changes in the physical properties of the ink. However, if the ink deteriorates inside the inner cylinder, the small holes drilled on the outer periphery often become clogged, and due to the nature of ink being a viscous substance, once the ink becomes clogged, the ink cannot leached out of the hole. Instead, the leakage bypasses the unclogged hole and naturally leaks to the outer periphery.
However, depending on the location, the water may not leach out, or it may not leach out at all, making it impossible to do so. In such cases, it is difficult to repair parts of the plate cylinder filled with ink, and the entire plate cylinder must be replaced, which is a heavy economic burden.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plate cylinder for a single cylinder type rotary copying machine, which overcomes the above-mentioned drawbacks.

The configuration of the present invention will be explained with reference to embodiments shown in the drawings.

In the embodiment shown in FIGS. 1 and 2, a 4Fi inner cylinder is rotatably attached to the plate cylinder shaft 2. 9a and 9b are Nodo,
Inner circle i! 4, and are fixed to the plate cylinder shaft 2 and rotated together. An inner circle f[+4M
A predetermined radial ink flow for ink flow between r&&
1FsS is provided and covered with a metal net, a metal plate, or a synthetic resin film with a large number of small holes punched therein.The mesh 1aTh is fixed, and a cloth screen 1b made of silk, cotton, synthetic resin, etc. is wound around its outer periphery. The outer cylinder 1 is formed by the outer cylinder 1, which is held down by a holding plate 11 provided with a bFi base paper fixing pin 1o for joining the screen.

Both ends of the plate cylinder shaft 2 are supported by frames 12a and 12bil (through them), and a sprocket 13t for rotationally driving the Fi plate cylinder is fixed to one end, and a sprocket (not shown) on the motor shaft side and a chain etc. It is connected.

A fixed spur gear 1 protrudes from the shaft support inner surface of the frame 12a.
4 are provided, and the planetary gears 15a and 15b pivotally supported on the side ll1i19a rotate together, and the gears 15& freely move around the outer periphery of the fixed spur gear 14.

The planetary gear 15'b is a spur gear 1 fixed to the side surface of the inner cylinder 4.
It meshes with 6 and drives.

An ink tank 18 and an ink vibrator 19 are connected to the ink pump 17Ifi & the inlet side, and the ink vibrator 19 is connected to the discharge air.

The other end of the ink vibrator 19 is connected to one end of the plate cylinder shaft 2 by a joint 20 using a water leak prevention means T, and further leads to an introduction passage 21 which is perforated in the plate cylinder shaft, and an island in the center of the inner cylinder 4. I'm talking. - Bearings 22m, 22b1 and oil seals 23a, 23b are inserted into the shaft portion of the plate cylinder at both ends of the inner cylinder 4 to provide rotary support and to completely prevent leakage of ink pumped into the inner cylinder 4.

The inside of the inner cylinder 4 is almost hollow, but -m is filled with ink 7
It is occupied by an ink supply path 8 (described in detail below) that leads to. The ink supply path 8 starts from an ink supply path front chamber 8a which has a discharge hole of the ink introduction path 21 in the center,
a, 24b and a narrow dispersion gap 26a between the dispersion roller 25;
26bt- to ink supply path rear chamber 8bK full of ink 7
is connected to. Inking roller 6 in ink groove 7
is supported by an inking roller shaft 27 parallel to the plate cylinder axis 2, and the outer periphery of the inking roller 6 rotates while maintaining a predetermined roller gap 5 between it and the inner peripheral surface of the net-like body 1a. do.

The dispersion roller is rotated 25 times by the dispersion roller drawing wheel 29 that meshes with the drive gear 28 fixed to the plate cylinder shaft 2, and then the inking/fourth wheel thin wheel 61 is moved through the idle front wheel 60.
mesh with each other, and the inking roller 6 is rotated. This inking roller has I! which is approximately equal to the printing width. It has 1 At-.

The impression cylinder 32 is attached to the outer cylinder of the outer cylinder 1 by a spring 66 which is rotatable and presses against the rotation of the outer cylinder.

In FIG. 2, reference numeral 64 denotes a paper loading table, and a paper feeding rubber roll 65 is provided at the front end thereof, and a paper sliding plate 66, &
A synchronous roll 68 is supported below the assembly sliding plate 36 facing the upper paper sliding plate 67, and a synchronous upper roll 69 is supported above the paper sliding upper plate 67, respectively.

Reference numeral 40 denotes printing paper placed on a stacking table 64.

Since this invention is constructed as described above, when the printing paper 40't- is placed on the paper tray 64 and the printing is started, printing #3*ao is fed one by one by the paper feed rubber roll 65, and is synchronized. The roll 68 and the synchronous upper roll 69 are synchronized so that the number of eggs is at a certain level, and the outer cylinder 1 of the plate cylinder and the impression cylinder 6 are
When the base paper is pressed between 2, the ink that emerges from the perforations of the base paper is transferred to the outer periphery of the outer cylinder 1, and the printed paper is discharged and the printing process is completed. However, the version i part which is the object of the present invention will be described below.

A gear train consisting of a fixed flat wheel 14 attached to the frame 12a, planetary wheels 15a and 15b pivotally supported on the hood trunk 9a, and a spur gear 16 fixed to the side surface of the inner cylinder 4 is a so-called idler & gear train tube. The outer cylinder 1 and the inner cylinder 4 are rotated differentially.

When the ink 1t is pumped from the ink pump 17, which has been set to have an over-chamber so as to obtain the appropriate printing density, the ink further spreads left and right without receiving any resistance in the narrow rk+gap of the dispersion gap 26a s 26b, and is dispersed. As the roller 25 rotates slowly, the ink is guided to the chamber 8b. When the ink emerges from the ink supply path 8b, the ink is deposited on the inking roller 6 and moves once to fill the inside of the net-like body 1a. In FIG. 2, the outer periphery of the inking roller 6 approaches in the direction opposite to the direction of movement of the net-like body 1a and is drawn to transfer ink, but the opening of the net-like body 1a In some cases, it may be better to turn in the same direction in relation to the ratio.

In any case, a predetermined roller S&11151& is used to prevent excessive pressure rise in the outer circumferential direction between the inking roller 6 and the net-like body 1a. L "fx is set so that the amount can be obtained naturally.

Inside the net-like body 1a by the inking roller 6: 1:'
11 Ink transferred to the surface is sequentially fed into the ink gap 6 due to the differential force between the internal and external cylinders, and circulates while being given a slight pressure increase due to the differential force 〇 Ink 1 gap 6 and roller l! In experiments, good results were obtained for J gap 5, ranging from 0.5 mm to 1.5 mm.

It may depend on the characteristics of the ink, but if it exceeds 1.5 degrees, it will cause ink build-up 1.
It appears on the surface layer of b, and is printed on the mark 11j nine paper 40, missing the perforations of the manufactured and base paper attached thereto.

As explained above, at ψ in the plate cylinder 1, the ink always fills and passes through the small gap formed by one stroke, and moreover, the ink is
Since the roller 25, the inking roller 6, and the ink 8 in the dyed state of the inner and outer cylinders are subjected to a forced kneading action, problems with drying and wearing may occur due to the sharp ink coming into contact with the air. Even if the components of the ink were to separate out, they would be easily mixed and dispersed by this kneading action. Therefore, problems such as ink clogging causing printing to become impossible or uneven printing are eliminated. In addition, even if the physical properties of the ink change due to temperature changes, there is a characteristic that the internal pressure increases and the amount of leaching decreases in proportion to the changes in various parts inside the plate cylinder. ) Due to mechanical forcing, the mark lll1
Eliminate problems such as excess or deficiency of concentration and non-uniformity. Also, if you make all the inspection holes (not shown) on the outer cylinder 1 other than a part of the marked fi 111 surface, you can easily see the part of the inner cylinder 4 that is full of ink, and in case the ink solidifies. It is possible to clean the plate cylinder up to the time it is attached to the machine, and it is possible to reduce the cost of replacing the entire plate cylinder.It also reduces the ink filling amount and the above-mentioned IIh machine. The ink pump 1 is also in the middle of printing due to the force of force.
When 7 is activated, it immediately reacts to printing or rinsing, so there is also the advantage that the ink replenishment operation is easy to understand for non-J# users.

[Brief explanation of the drawing]

w, 1. Figure 1 is a vertical view of the plate cylinder of the present invention @, Figure 2 is a numerical diagram showing the relationship between the central movement of Figure 1 and the paper feeding device. 1: Outer cylinder 1a: Net-like body 1b Niscreen 2: Plate cylinder shaft 6: Ink gap 4: Inner cylinder 5: Roller gap 6: Inking Φ roller 7: Full of ink 8: Ink 91. Casement 8a: Ink supply path front chamber 8b: Ink supply & rear chamber 14: 1 constant spur gears 15a, 15b: planetary details 16: flat wheel 17: ink pump 18: ink tank 19: ink vibrator 20: & hand 21: Introductory path 24&-, 24b: fs 25: Dispersion roller

Claims (1)

[Claims] A mesh body (1a) and a screen (1b) wrapped around its outer periphery.
), the entire outer cylinder (1) is rotatably supported around the plate cylinder axis (2), and the inner cylinder has a predetermined radial ink gap (6) with respect to the inner peripheral surface of the net-like body (1a). Cylinder (4) all,
The printing plate shaft (2) is supported so as to be differentially moved with respect to the outer cylinder (1), and a predetermined roller gap 11t [(5 ) A bunking roller (6) that rotates while maintaining Th is pivotally arranged in the ink groove (7) of the inner cylinder (4), and the entire ink supply path (8) communicating with the ink groove (7) is provided. A plate barrel for a single-barrel rotary copying machine featuring: