JP2859818B2 - Printing paper drying prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing drying of printing paper.

[0002]

2. Description of the Related Art In a rotary printing press, after printing on continuous paper using a printing roll, the printing paper is cut into a predetermined size and discharged. By the way, since such a rotary printing press operates at high speed, there is a problem that the paper is stained by the paper being overlapped before the ink attached to the paper dries during the printing process. Therefore, in the prior art, in order to prevent such paper stains, a dry process for drying the paper is provided after the printing process. In this drying process, hot air is applied to the printing paper to forcibly dry the ink.

[0003]

[Problem to be Solved] However, after passing through such a dry process, moisture is removed not only from ink but also from paper, so that the elasticity of the paper is lost and cracks or tears are caused by bending. It will be easier. Further, when the paper is cut in this state and absorbs moisture, the dimensions of the paper change, and the cut edges become uneven, resulting in a reduction in product quality. In contrast,
In the case of simply spraying water on the printing paper by spraying, the same problem occurs because water is not replenished to the inside of the paper, while the measure of directly applying water to the printing paper with a brush,
Problems such as undesired wetness and expansion and contraction of the paper are expected.

In the prior art, after passing through a dry process, the printing paper is cooled by wrapping the printing paper around a so-called cooling roll through which cooling water passes.
This cooling roll alone does not prevent the problem of paper drying.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printing paper drying prevention apparatus which is simple and can prevent the printing paper from drying by supplying an appropriate amount of water to the printing paper. I do.

[0006]

According to the present invention, there is provided an apparatus for preventing printing paper from drying, wherein the printing paper is dried and wrapped around an outer periphery of a supply roll and supplied to support the supply roll. A case movably attached to the housing, a storage unit provided in the case and storing the humidifying liquid, and an unloading unit provided in the case and discharging the humidification liquid stored in the storing unit to the outside. Means, provided in the case, separated means for separating and repelling the humidifying liquid carried out by the carrying-out means by an appropriate amount from the carrying-out means, and provided in the case apart from the separating means and separated by the separating means. A supply means for receiving the repelled humidifying liquid, pressing the printing paper against the supply roll, and supplying the received humidifying liquid to the printing paper; Moving means for moving the case with respect to the supply roll between a contact position where the means contacts the supply roll and a separation position where the supply means separates from the supply roll. .

[0007]

According to the printing paper drying prevention apparatus of the present invention, the separating means dispense an appropriate amount of the humidifying liquid to the supplying means. Is supplied to the printing paper, so that an appropriate amount of water is supplied to the inside of the paper.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of a cooling device 100 which is a part of a printing press. In FIG.
A cooling roll 102 is rotatably supported. The printing paper P heated through the drying process A is cooled by the cooling device 10.
0, and is cooled while passing around the cooling roll 102 while surrounding it, and reaches the next cutting step B. Note that the cooling roll 102 constituting the supply roll
Is a device for cooling the outer periphery by passing cooling water through the inside of the device, thereby cooling the wrapped printing paper. A drying prevention device 200 is provided on the housing 101 in the vicinity of the two cooling rolls 102. For convenience of explanation, only one of the drying prevention devices 200 will be described in detail, but the configuration and operation are the same for the other device.

FIG. 2 is an enlarged sectional view of the drying prevention device 200. FIG. 3 is a view of the anti-drying device of FIG. 2 as viewed in the direction III, and FIG. 4 is a view of the same in the direction of IV. In the left half of FIG. 3, the break-in roll and the brush roll are removed. Is shown. Cooling device 100 showing only a part
Case 2 of the drying prevention device 200
01 is provided so as to be movable in the horizontal direction. Case 2
At the lower part of 01, a box-shaped watercraft 202 is provided,
Water, which is a humidifying liquid, is stored in the watercraft 202. Incidentally, the watercraft 202 constitutes a storage means.

A water roll 203 is disposed so as to be rotatable with respect to a case 201 such that the lower part is immersed in water stored in a watercraft 202. Water roll 203
Is a motor 204 similarly attached to the case 201.
As a result, it is driven via the toothed belt 205. The rotation speed of the motor 204 can be changed by a control device (not shown). It should be noted that the water discharging roll 203, the motor 204, and the toothed belt 205 constitute an unloading unit.

Above the water roll 203, a brush roll 206 is disposed so as to be rotatable with respect to the case 201. In the outer periphery of the brush roll 206, countless brushes 206a are planted.
Is in contact with the outer periphery of the water roll 203. The brush roll 206 is driven by a motor 207 similarly attached to the case 201 via a toothed belt 208. In this embodiment, the rotation speed of the motor 207 is constant. The brush roll 206, the motor 207, and the toothed belt 208 constitute a separating unit.

The brush roll 206 is supported by the case 201 via an eccentric metal 210 at support portions 206a (FIG. 3) protruding from both ends thereof. Eccentric metal 210
Has an outer cylindrical surface fitted into the circular hole of the case 201 and an inner cylindrical surface fitted with the support portion 206a, but the axial positions of these cylindrical surfaces are different. Therefore, while the brush roll 206 can rotate freely around its axis, when the eccentric metal 210 rotates with respect to the case 201, the rotation axis of the brush roll moves accordingly. Further, the eccentric metal 210 has an arm portion 210a (FIG. 3) that rotates integrally, and is screwed to the tip of one arm portion to be connected to the arm portion 210a, ie, the eccentric metal 2.
A screw 211 for rotating (pivoting) 10 is provided on the upper part of the case 201. The eccentric metal 21
0 and the screw 211 constitute a changing means.

A swimsuit roll 212 is rotatably arranged with respect to the case 201 so as to face the brush roll 206. The outer periphery of the swimsuit roll 212 is covered with a rubber material 212a. The break-in roll 213 is arranged so as to be rotatable with respect to the case 201 so as to contact the rubber member 212a. The running-in roll 213, which is a hollow cylinder, is provided with a bearing 213 by an eccentric shaft 215 attached to the case 201, as is apparent from FIG.
Both ends are supported via a. By rotating the eccentric shaft 215 with respect to the case 201, the break-in roll 213 can be separated from the swimsuit roll 212.
In the present embodiment, the swimsuit roll 212 and the break-in roll 213 constitute the supply unit. However, in another embodiment, the supply unit may be constituted only by the swimsuit roll without the break-in roll.

The housing 201 is connected to the case 201.
An air cylinder 214 is provided for driving the air cylinder in the horizontal direction. At the position where the air cylinder 214 is retracted,
The swimsuit roll 212 is in contact with the cooling roll 102 with the printing paper P interposed therebetween, while at the position where the air cylinder 214 is fully extended, the swimsuit roll 212 and the cooling roll 10
2 are separated from each other. Air cylinder 21
4 constitutes a moving means.

Next, the operation of the embodiment of the present invention will be described with reference to the drawings. In FIG. 2, the air cylinder 21
4 is retracted, and the swimsuit roll 212
It is assumed that 2 is in contact. Watercraft 202 picked up on its outer circumference by motor-driven water roll 203
The water in the swimsuit roll 212 is repelled by the tip of the brush 206a of the motor-driven brush roll 206.
Adheres to the outer periphery of

Here, the swimsuit roll 212 is in contact with the cooling roll 102 with the printing paper P interposed therebetween, and is therefore driven to rotate by the cooling roll 102. The running-in roll 213 is driven to rotate by the swimsuit roll 212. Therefore, the water adhering to the outer periphery of the swimsuit roll 212 is made uniform by the break-in roll 213 and then cooled.
02 and the swimsuit roll 212 are pressed inward in the thickness direction of the printing paper P, whereby water permeates into the paper.

On the other hand, when the air cylinder 214 is fully extended, the swimsuit roll 212 is normally separated from the cooling roll 102 by about 50 mm, so that the above-described operation does not occur. This is because the drying prevention device may not be required depending on the paper quality, and the drying prevention device is not obstructed when the leading edge of the continuous paper to be printed is wound around the outer periphery of the cooling roll 102 in preparation for printing. In order to

There are two methods for changing the amount of water supplied to the printing paper P. First, the rotation speed of the motor 204 is adjusted to change the amount of water that the water roll 203 lifts from the watercraft 202. Another method is to rotate the screw 211 and pivot the eccentric metal 210,
The amount of contact between the brush 206a and the water roll 203 is changed to change the amount of water to be repelled. Thereby, the amount of water can be delicately changed depending on the paper quality, and the quality of the product can be improved.

As described above, the present invention has been described with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and it is needless to say that modifications and improvements can be made as appropriate. For example, the changing means is not limited to the eccentric metal, and any structure that can change the distance between the axes of the brush roll and the water roll is sufficient.

[0020]

As described above, according to the printing paper drying prevention apparatus of the present invention, the separation means dispense an appropriate amount of the humidifying liquid to the supply means. Since the humidifying liquid is supplied to the printing paper while being pressed as printing paper, an appropriate amount of water is supplied to the inside of the paper.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a cooling device 100 which is a part of a printing press.

FIG. 2 is an enlarged sectional view of the drying prevention device 200.

FIG. 3 is a view of the anti-drying device of FIG. 2 as viewed from a direction III, but in a left half portion, a break-in roll and a brush roll are removed.

FIG. 4 is a view of the anti-drying device of FIG. 2 as viewed from an IV direction.

[Explanation of symbols]

 Reference Signs List 101 housing 201 case 202 water boat 203 water roll 206 brush roll 212 swimsuit roll 213 break-in roll 214 air cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-64876 (JP, A) JP-A-61-254345 (JP, A) JP-A-5-169617 (JP, A) 5451 (JP, U) Actually open sho 59-87944 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 23/02 B41M 7/00 B41F 7/28

Claims (6)

(57) [Claims] An apparatus for preventing drying of printing paper, which is supplied after being wound around an outer periphery of a supply roll after being printed and dried, a case movably attached to a housing supporting the supply roll, and the case A storage means for storing the humidifying liquid, and a discharge means provided in the case for discharging the humidification liquid stored in the storage means to the outside; and a discharge means provided for the case and discharged by the discharge means. Separating means for separating the humidifying liquid by an appropriate amount from the carry-out means and repelling it, provided in the case apart from the separating means, receiving the humidifying liquid separated and repelled by the separating means,
Supply means for supplying the received humidifying liquid to the printing paper while pressing the printing paper against the supply roll; and a contact position at which the supply means contacts the supply roll; and And a moving means for moving the case with respect to the supply roll between the separated position and the separated position. 2. The drying prevention device according to claim 1, wherein the carrying-out means comprises a rotatable water roll having a lower part immersed in the storage means. 3. The drying prevention device according to claim 2, wherein the rotation speed of the water roll is adjustable. 4. The anti-drying device according to claim 2, wherein the separating means comprises a rotatable brush roll having a brush having a leading end abutting on the water roll and planted on the outer periphery. 5. The anti-drying device according to claim 4, further comprising changing means for changing an axial distance between the brush roll and the water roll. 6. The drying prevention apparatus according to claim 1, wherein the supply unit includes a swimsuit roll that contacts the supply roll, and a break-in roll that contacts the swimsuit roll.