JPS6319415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust removal device for a web-fed rotary printing press, and more particularly to a device for removing dust and the like adhering to a printing medium fed from a paper feed section of a web-fed rotary printing press.

2. Description of the Related Art Printing on a printing material such as a plastic film using a gravure printing method is widely practiced in a rotary rotary printing press. In this case, if printing is performed with dirt, dust, or other dust attached to the printing surface of the printing material, the printed material will be defective, such as pinholes or dust attached to the pattern area. Put it away.

Therefore, it is desirable to remove dust from the surface of the printing material.

As such a dust removal device, a device that removes dust using an ultrasonic oscillator is commercially available. However, such a device is not only expensive, but also has a limitation in the size of dust particles, and has the disadvantage that it cannot remove very large particles of dust.

In order to eliminate these defects, some attempts have been made to remove the dust on the surface of the printing material using a vacuum suction method, but this method has the disadvantage that small dust that is electrostatically attached is difficult to remove. ing.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an inexpensive dust removal device for a web-fed rotary printing press that is capable of removing fine dust to relatively large dust.

Still another object of the present invention is to provide a device that can perform dust removal continuously.

The present invention will be explained in more detail below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram for explaining the operation when the dust removal device 1 of the present invention is attached to a web-fed rotary printing press. The printing material 10 is supplied from the paper feed section 11 of the rotary printing press, and is sent to the printing section 20 via various guide rolls, tension rolls, etc.
Here, the first color is printed. The printing medium 10 that has been printed with the first color is then printed with the second and subsequent colors as required, and then is discharged to the paper discharge section.

In the dust removal device 1 of the present invention, rolls 2 and 3 having adhesive layers on their surfaces are attached to a roll attachment arm 4. The roll attachment arms 4 are present at both ends of the rolls 2 and 3, respectively, and the first
Only one of them is shown in the figure. Further, the roll mounting arm 4 is rotatable in a direction perpendicular to the axes of the rolls 2 and 3. This rotation is caused by the driving force of a motor or the like, and the rotation is made such that it can be stopped and fixed at a predetermined position. Further, the rolls 2 and 3 are attached to a roll attachment arm 4 so as to be freely rotatable.

The roll 2 of such a dust removal device 1 is connected to the paper feed section 11.
The printing material 10 is brought into contact with the unprinted surface of the printing material 10 supplied from the printer. The roll 2 is freely rotatable and rotates as the printing medium 10 moves, resulting in a wrinkled rolling contact.

Note that it is also possible to adjust the contact area between the printing medium 10 and the roll 2 by moving the guide roll 21 in the left-right direction in FIG.

In this way, the printing material 10 is
can remove dust from the printing surface.

In addition, as dust adheres to the adhesive layer on the surface of the roll 2, the adhesive strength decreases, so the roll mounting arm 4 is automatically or manually driven by a drive source such as a motor at predetermined intervals. By rotating and exchanging the positions of roll 2 and roll 3, the roll whose adhesive strength has decreased is replaced with a roll whose adhesive strength has not decreased.

In this way, the roll 3 comes into rotational contact with the printing surface of the printing material 10.

On the other hand, the roll 2 whose adhesive strength has decreased after being replaced has its adhesive strength restored by wiping off dust with a cloth soaked in water, etc., in preparation for replacing the roll position in the event that the adhesive strength of the roll 3 decreases. .

Figures 2 and 3 are more detailed explanatory diagrams of the device of the present invention, where Figure 2 is viewed from the axial direction of the roll, and Figure 3 is viewed from a direction perpendicular to the axial direction of the roll. FIG.

The rolls 2 and 3 having adhesive layers on their surfaces are attached to a roll attachment arm 4 via bearings 5, so that they can rotate freely.

On the other hand, the roll attachment arm 4 is fixed to a gear 8 via a shaft 7 supported by a frame 6. The gear 8 is connected to a reducer 32 via a chain 30 and a gear 31.
The driving force of the motor 33, which is decelerated by the motor 33, is transmitted and rotationally driven.

The motor 33 is mounted and fixed on a motor mounting table 34.

The motor 33 is driven when the adhesive force on the surface of the roll 2 or the roll 3 decreases, and is used to switch the positions of the roll 2 and the roll 3, respectively.

Therefore, it is convenient if the motor 33 is driven manually when necessary for roll exchange, or automatically driven by a timer every predetermined time period.
Furthermore, if the machine is driven automatically, a buzzer etc. can be used to warn the worker when the machine is driven, so that the worker can easily know when to start removing dust from rolls with reduced adhesion. Therefore, it is convenient. The roll having an adhesive layer on its surface may be a plastic or metal roll whose surface is coated with adhesive rubber or the like, and the hardness of the adhesive layer is preferably in the range of 5° to 20°.

As the material for the adhesive layer, urethane rubber manufactured by Shinto Cello Sangyo Co., Ltd. under the trade name "Newtack" can be used. In this case, the thickness of the adhesive layer may be about 10 mm for a roll with a diameter of 100 mm.

The apparatus of the present invention is particularly effective when a plastic film or the like is used as the printing material.

Further, in the above description, a case has been described in which two rolls are used as the rolls having an adhesive layer on the surface, but three or more rolls may be used. In this case, a plurality of rolls may be brought into rotational contact with the printing medium.

As described above in detail, the apparatus of the present invention requires only the rotating roll to be brought into contact with the printing medium in a replaceable manner, and is very inexpensive. Furthermore, since the apparatus of the present invention can reliably remove dust ranging from small to large dust, it is possible to prevent the occurrence of defective printed matter due to the presence of dust.

[Brief explanation of the drawing]

Fig. 1 shows a schematic explanatory diagram for explaining the operation when the dust removal device of the present invention is attached to a roll-up rotary printing press, and Figs. 2 and 3 show the axial direction and the axial direction of the roll, respectively. FIG. 2 is an explanatory diagram of the device of the present invention when viewed from a right angle direction. 2, 3...Roll, 4...Roll mounting arm,
5...Bearing, 6...Frame, 7...Shaft, 8...
Gear, 10... Printing material, 11... Paper feed section, 20
...Printing section, 21...Guide roll, 30...Chain, 31...Gear, 32...Reducer, 33...
...Motor, 34...Motor mounting stand.

Claims (1)

[Scope of Claims] 1. A plurality of rolls having an adhesive layer on the surface are each attached to a plurality of roll mounting arms rotatable in a direction perpendicular to the axis of the roll, and one of the plurality of rolls is The plurality of rolls are brought into rotational contact with the unprinted surface of the printing material supplied from the paper feed section of the rotary rotary printing press, and the rolls in rotational contact with the unprinted surface of the printing material are brought into rotational contact with the plurality of rolls. A dust removal device for a winding rotary printing press, characterized in that it is replaceable with another part of the rolls. 2. The dust removal device for a web-fed rotary printing press according to claim 1, wherein the roll is replaced automatically by a timer so that the replacement motor is activated every predetermined time period.