JPH0436271Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to paper guide rollers for rotary printing presses, and is particularly applicable to paper guide rollers for rotary printing presses, which are particularly resistant to ink adhesion and can be easily wiped off even if ink does adhere to them. This paper relates to paper guide rollers for type printing machines.

[Prior Art] Satellite type and arch type are generally representative unit arrangements of offset rotary printing presses.

As shown in Fig. 5, in the satellite type, blanket cylinders 2 made of small diameter cylinders are arranged at several places around an impression cylinder 1 made of a large diameter cylinder, and the impression cylinder 1 and the bracket cylinder 2 are connected to each other. Printing is performed through the printing medium 3 between the two. A pair of paper guide rollers 4 are arranged above the impression cylinder 1, and a pair of paper guide rollers 4 are arranged above the impression cylinder 1.
The feed direction can be changed. That is, the pair of paper guide rollers 4 change the direction of the printing material 3 sent in the direction of arrow A, and move the printing material 3 toward the impression cylinder 1.
At the same time, the direction of the printed substrate 3 sent from the impression cylinder 1 is changed in the direction of arrow B. Further, 5 is a plate cylinder around which the printing plate is wound, 6 is an inking device for supplying ink to the plate cylinder 5, and 7 is a water supply device for supplying water to the plate cylinder 5. In the figure, arrows drawn on the impression cylinder 1, blanket cylinder 2, paper guide roller 4, and plate cylinder 5 indicate their respective rotation directions. In such a satellite type, since the blanket cylinder 2 is arranged only on one side of the printing material 3, printing is performed only on the paper surface 3a side of the printing material 3. Further, since the satellite type has blanket cylinders 2 arranged at several locations around the impression cylinder 1, it is suitable for multicolor printing.

As shown in FIG. 6, in the arch type, a pair of blanket cylinders 2 are arranged with their cylindrical surfaces in contact with each other, and printing is performed by passing a printing material 3 between the contact surfaces of both blanket cylinders 2. It's summery. A guide roller 4 is arranged above both blanket cylinders 2, and changes the orientation of the printed material 3 sent from both blanket cylinders 2 in the direction of arrow C. 5 is a plate cylinder, and 6 and 7 are an inking device and a water supply device, respectively. In the arch type, since the plate cylinder 5 and the blanket cylinder 2 are arranged on both sides of the printing material 3, printing is performed on both sides of the printing material 3, the paper surface 3a and the paper surface 3b.

By the way, since the ink on the printing material 3 has not yet dried immediately after printing, it is necessary to dry it. This involves passing the printing substrate 3 through a drying device,
There is a method of applying heat, or a method of leaving the printing material 3 in the air for a certain period of time to evaporate the solvent in the ink and oxidatively polymerize the resin.

[Problem that the invention attempts to solve]

However, in the above-mentioned satellite type and arch type, there is no space to install the drying device before the non-printed material passes through the printing section and reaches the guide roller, and the printed material is transported at high speed. Therefore, the time it is left in the air is extremely short. Therefore, at present, the ink printed on the paper surface is brought into contact with the paper guide roller in an undried state. For this reason, undried ink adheres to the paper guide roller, and the amount of the ink adhered gradually increases as printing continues. Eventually, such adhered ink ends up adhering to the printing material passing through the paper guide roller, causing defective printed matter.

Currently, there is no practical way to prevent ink from adhering to the paper guide rollers, so if the paper guide rollers become contaminated with ink,
The machine is stopped, and a worker manually wipes the dirt off each paper guide roller using a rag and cleaning oil. However, the ink adhering to the paper guide roller hardens and becomes hard, and cannot be easily wiped off. Moreover, multi-color printing machines are equipped with tens to hundreds of paper guide rollers per unit, making the work quite hard for the operators. Furthermore, since the wiping operation takes time, the machine stops for a correspondingly long time, which is not desirable from the standpoint of efficient machine operation.

An object of the present invention is to provide a paper guide roller for a rotary printing press that reduces the labor of the operator and enables efficient operation of the printing machine.

[Means for solving problems]

In order to achieve the above object, the paper guide roller of the rotary printing press of the present invention includes a gold roller body whose both ends are pivotally supported and is rotatable around the axis, and a gold roller body that is placed over the outer peripheral surface of the gold roller body. , a sleeve made of a wear-resistant porous material with a sealed gap formed between it and the gold roller body, and an ink solvent supply section that fills the gap with an ink solvent or a non-adhesive agent. It is equipped with

[Effect]

According to the above configuration, if the ink solvent or non-adhesive agent (hereinafter referred to as ink solvent, etc.) is injected into the gap formed between the gold roller body and the sleeve,
The ink solvent, etc. begins to permeate into the sleeve due to capillary action, and since the gold roller body and the sleeve rotate together at high speed, centrifugal force acts, causing the ink solvent, etc. to seep out to the outer surface of the sleeve. A uniform layer of ink solvent or the like is formed on the outer surface of the sleeve, so that ink does not easily adhere to it. Also,
Even if ink adheres to the surface, it is easy to wipe off because the adhered ink does not harden due to the action of an ink solvent or the like.

〔Example〕

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

(First Embodiment) FIG. 1 is a partial sectional view showing the first embodiment of the paper guide roller according to the present invention, and FIG. 2 is a -
A cross-sectional view taken along the line, and FIG. 3 is an enlarged cross-sectional view when an ink solvent or the like is injected into the gap. As shown in the figure, the paper guide roller 10 of the present invention has a gold roller body 11 covered with a sleeve 12. The gold roller body 11 has an axially elongated cylindrical shape and is made of iron, aluminum, or the like. A rotating shaft 13 is fixed to the center of both end surfaces 11a of the gold roller body 11, and both rotating shafts 13
are respectively supported by bearings 14, and the gold roller main body 11 is rotatable around the respective axes.

The outer peripheral surface of the gold roller body 11 is covered with a sleeve 12 made of a wear-resistant porous material (eg, ceramics, sintered metal, etc.). A rib 1 with a height of several millimeters is provided on the inner peripheral surface of this sleeve 12.
2a is provided in a spiral shape, and the sleeve 1
Ribs 12b are also provided at both ends of 2. A closed gap 15 is formed between the outer surface of the gold roller body 11 and the inner surface of the sleeve 12 by the ribs 12a and 12b.

An injection port 16 serving as a supply section for filling ink solvent and the like is provided at one end of the sleeve 12, and the injection port 16 can be sealed with a stopper 17.

Next, the operation of this embodiment will be explained.

First, before starting the printing press, an ink solvent or the like (silicone oil, kerosene, etc.) for dissolving ink is injected into the gap 15 from the injection port 16. FIG. 3 shows how the ink solvent, etc. is injected into the cavity 15 (in the figure, 18 is the ink solvent, etc.). When the printing press starts, the printing material is continuously conveyed, and this conveyance causes the paper guide roller 1 to rotate around the bearing 14 at high speed (for example, 1500 rpm). Cavity part 15
The ink solvent or the like injected into the sleeve 12 penetrates into the sleeve 12 by capillary action, and further penetrates deeper by the action of centrifugal force. Finally, the ink solvent etc. seeps out onto the outer surface of the sleeve 12, forming a uniform layer of the ink solvent etc. on the outer surface of the sleeve 12. This layer makes it difficult for undried ink on the printing material to adhere to the outer surface of the sleeve 12.
2 can be prevented from getting dirty with ink.

Further, since the ink solvent and the like that have oozed out onto the outer surface of the sleeve 12 are carried away by the printing material in extremely small amounts, it is necessary to replenish the ink solvent from the injection port 16 as appropriate.

According to this embodiment, since the ribs are spirally provided in the gap 15, the rotation of the paper guide roller 10 allows the ink solvent and the like to spread to every corner of the gap 15.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings.

In the figure, the outer peripheral surface of the gold roller main body 11 is covered with a sleeve 12, and a sealed gap 15 is formed between the inner peripheral surface of the sleeve 12 and the outer peripheral surface of the gold roller main body 11. This is the same as the previous embodiment.

Furthermore, in this embodiment, the supply section is capable of continuously supplying ink solvent and the like. That is, a plurality of channels 20a are provided inside the plate flange 20 provided at the end of the gold roller body 11 radially from the center to the cavity 15, and a channel 13a is also provided inside the rotating shaft 13. It is being Both flow paths 13a and 20a are communicated with each other. A rotary joint 21 is connected to the tip of the rotary shaft 13, and an O-ring 22 is connected to the abutting portion of the rotary shaft 13 and the rotary joint 21.
is mediated. Further, a conduit 23 is joined to the side surface of the rotary joint 21, and the other end of the conduit 23 is connected to a pump (not shown).

The operation of the second embodiment having such a configuration will be explained.

The ink solvent etc. fed by the pump is transferred to pipe line 2.
3. Rotary joint 21, flow paths 13a, 20a and flow,
The cavity 15 is filled. The filled ink solvent and the like seep out onto the outer surface of the sleeve 12 to prevent ink from adhering to it. In this case, since the rotary joint 21 is connected to the rotary shaft 13, it is possible to supply ink solvent or the like at any time even while the paper guide roller 11 is rotating.

In addition, even if the printing machine is operated for a long time and ink adheres to the outer surface of the sleeve 12, the ink solvent etc. prevents the ink from curing, so instead of printing on an unprinted blank paper. By feeding the blank paper, the ink on the sleeve 12 will adhere to the blank paper, and the outer surface of the sleeve 12 can be cleaned.

According to this embodiment, the worker's paper guide roller 1
No wiping operation is required at all.

In addition, if a solenoid valve is provided in the middle of the pipe line 23 and this solenoid valve is controlled by a control device, an optimum amount can be supplied by preventing insufficient or excessive supply of the ink solvent, etc. Furthermore, it goes without saying that the paper guide rollers of the first and second embodiments can be applied not only to offset printing but also to other rotary printing machines such as gravure printing.

[Effect of idea]

As explained above, according to the present invention, the gold roller body is covered with a sleeve made of a porous material, the gap between the gold roller body and the sleeve is filled with ink solvent, etc., and the ink solvent etc. is transferred to the sleeve by centrifugal force. Since the ink solvent is leached onto the outer surface, the ink solvent and the like are evenly distributed over the outer surface of the sleeve, preventing ink from adhering to the entire surface of the sleeve, and eliminating the problem of staining the printed material with ink. Also,
Not only does it save you the trouble of wiping off the ink, but it also greatly reduces machine downtime.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1,
Fig. 3 is an enlarged sectional view when ink solvent etc. is injected into the gap, Fig. 4 is a partial sectional view showing the second embodiment of the present invention, and Fig. 5 is a schematic diagram of a satellite type rotary printing press. Layout diagram, FIG. 6 is a schematic layout diagram of an arch type rotary printing press. 11...Gold roller body, 12...Sleeve, 1
3...Rotating shaft, 14...Bearing, 15...Gap portion,
16... Inlet, 17... Stopper, 18... Ink solvent or non-adhesive agent.

Claims (1)

[Claims for Utility Model Registration] (1) A gold roller body whose both ends are pivotally supported and rotatable around the axis, and a metal roller that is placed over the outer peripheral surface of the gold roller body and is sealed between the gold roller body and the gold roller body. A paper guide roller for a rotary printing press, comprising a sleeve made of a wear-resistant porous material in which shaped voids are formed, and a supply section that fills the voids with an ink solvent or a non-adhesive agent. (2) The supply section is provided in the sleeve and includes an injection port that penetrates from the outside into the cavity, and a stopper that closes the injection port, as described in claim 1 of the utility model registration claim. paper guide rollers for rotary printing machines. (3) The supply section includes a channel that communicates the gap with the outside through the center of the end surface of the gold roller body, and a rotary joint provided at the end of the channel. A paper guide roller for a rotary printing press according to claim 1 of the patented utility model.