JP2009202486A - Inking device of printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inking device of a printer, dehumidifying ink properly for the dehumidifying request according to printing speed or others. <P>SOLUTION: The inking device has a humidity adjusting fan 21 arranged in the space surrounded by a plurality of ink rollers of ink roller group and adjusting the humidity in the space, the humidity adjusting fan 21 is constituted so as to have blades blowing air to the outside and surrounding of the rotary shaft 25 rotating according to the rotation speed of the ink roller group, and to have variable pitch blades 27 in which the pitch (angle of the blade) changes according to the rotation speed of the rotary shaft 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inking device for a printing press having a device for adjusting the humidity of a plurality of ink roller portions in an ink roller group.

In a printing press such as a rotary printing press or a sheet-fed printing press, ink is supplied from an ink supply source such as an ink fountain to a printing plate mounted on a plate cylinder through an inking device having a group of ink rollers. To do.
In such an inking apparatus, it is important to supply the printing plate while maintaining the ink in an appropriate state in order to ensure printing quality.

For example, Patent Document 1 proposes a technique for stabilizing and maintaining the ink temperature on the ink roller at the optimum temperature.
Japanese Patent Laid-Open No. 8-1918

By the way, when supplying ink, we want to manage not only the temperature of the ink but also the humidity.
In other words, a dampening device is usually provided near the plate cylinder, and dampening water is also supplied from the dampening device to the printing plate via a dampening roller when supplying ink. Therefore, when the ink moves from the ink supply source to the printing plate via the ink roller group, the humidity of the ink tends to be excessive on the ink roller near the printing plate due to the influence of the fountain solution.

  When the humidity of the ink becomes excessively high, it takes time to dry the ink of the printed matter after printing, and it is sent to the next process without being dried, and the non-printing part of the printed matter and the printing device that the ink should not originally adhere to It causes problems such as ink adhering to the surroundings. On the other hand, if the humidity of the ink becomes too low, the viscosity of the ink will increase and the ink transfer to the printed matter will not be performed smoothly, and it will be difficult to maintain a balance with the amount of dampening water supplied. There is a risk of adverse effects.

Therefore, it is conceivable to equip such a drying device that keeps the ink on the peripheral surface of the ink roller in an appropriate dry state.
Furthermore, since the rotational speed of the dampening roller increases as the printing speed increases, the humidity of the ink on the ink roller near the printing plate tends to increase. From such a point of view, a drying device that increases the drying effect may be provided in accordance with the speed of the printing press including the plate cylinder and the ink roller.

Specifically, if a dehumidifying fan that rotates in conjunction with the printing press is provided, the rotational speed of the dehumidifying fan increases and the dehumidifying effect increases as the speed of the printing press increases. Can respond to increasing dehumidification requirements.
However, the dehumidification request according to the printing speed does not always correspond to the dehumidifying effect of the dehumidifying fan that changes according to the printing speed.

  For example, if the dehumidifying fan is simply configured to rotate in conjunction with the printing press, the dehumidifying fan can respond to the dehumidifying request during low-speed operation of the printing press, but the dehumidifying effect of the dehumidifying fan during high-speed operation of the printing press. In many cases, an increase in the number of dehumidifications cannot respond to an increase in dehumidification requirements. On the contrary, if the dehumidifying effect of the dehumidifying fan is set to answer the dehumidifying request when the printing press is operating at high speed, the dehumidifying fan is likely to be excessively dehumidified when the printing press is operating at low speed.

Of course, the ink dehumidification request does not depend only on the operating speed of the printing press, but is generally considered to be strongly related to the operating speed of the printing press.
The present invention has been devised in view of such problems, and provides an inking device for a printing press that can dehumidify ink to an appropriate level in response to a dehumidification request for ink according to a printing speed or the like. The purpose is to provide.

In order to achieve the above object, an inking device of a first printing press according to the present invention is a space surrounded by a plurality of ink rollers in the ink roller group in the inking device of a printing press having an ink roller group. And a humidity adjusting device for adjusting the humidity in the space (Claim 1).
The humidity adjusting device includes a humidity adjusting fan, and the humidity adjusting fan is a blade that blows air around the rotating shaft that rotates according to the rotation speed of the ink roller group, and the rotating shaft It is preferable to have a variable pitch blade whose pitch (blade angle) changes in accordance with the rotational speed of the blade.

The variable pitch blades are pivotally supported by a support coupled to the rotating shaft, and are urged by a spring in a direction to reduce the pitch, and the variable pitch blades are variable by centrifugal force generated by rotation of the rotating shaft. It is preferable that the pivot point is arranged so that the pitch of the pitch blade is increased.
Further, the humidity adjusting device includes a humidity adjusting fan, and the humidity adjusting fan is rotationally driven via a transmission with respect to a rotating shaft that rotates in accordance with a rotation speed of the ink roller group. It is also preferable to be configured to be controllable based on the humidity state in the space (claim 4).

The transmission is preferably a continuously variable transmission (Claim 5).
The humidity adjusting device preferably further includes an ink roller temperature increasing device for adjusting the humidity around the ink roller by increasing the temperature of any ink roller in the ink roller group. Item 6).
It is preferable that the ink roller temperature raising device is constituted by a water flow mechanism for passing warm water into the ink roller.

It is also preferable that the ink roller temperature raising device is constituted by a swinging mechanism that generates heat between the ink roller and another ink roller that comes into contact by swinging the ink roller in the axial direction. .
Further, the humidity adjusting device includes a humidity adjusting fan, and the humidity adjusting fan has a blade that blows air around the rotating shaft that rotates in accordance with the rotation speed of the ink roller group, and It is also preferable to have a hollow part inside the blade and to have a blower fan that blows air into the hollow part at the end of the humidity adjusting fan.

According to the inking device (Claim 1) of the printing press of the present invention, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request by the humidity adjusting device.
According to the inking device for a printing press of the present invention (Claim 2), in the humidity adjusting fan that adjusts the humidity in the space surrounded by the plurality of ink rollers, the rotation rotates according to the rotation speed of the ink roller group. Since the blades on the shaft are variable pitch blades whose pitch (blade angle) changes according to the rotational speed of the rotating shaft, not only the rotational speed of the rotating shaft of the humidity adjustment fan corresponding to the operating speed of the printing press The output of the humidity adjusting fan also changes due to the change in the pitch of the blades, and the degree of adjustment of the humidity in the space can be changed more closely. Therefore, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

In this case, if the pitch of the blade is increased by the centrifugal force generated by the rotation of the rotating shaft by the arrangement of the pivot point of the variable pitch blade and the installation of the spring that biases the blade in the direction of decreasing the pitch, It is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.
According to the inking device for a printing press of the present invention (Claim 4), the humidity adjusting fan is rotationally driven via the transmission with respect to the rotating shaft that rotates in accordance with the rotational speed of the ink roller group. By adjusting the non-speed change of the apparatus, it becomes possible to change the degree of adjustment of humidity in the space surrounded by the plurality of ink rollers more precisely. Therefore, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

In this case, if the transmission is a continuously variable transmission, the degree of adjustment of humidity in the space can be changed more precisely (claim 5).
According to the inking device for a printing press of the present invention (Claim 6), the temperature of the ink roller is increased by the ink roller temperature raising device provided in any one of the ink rollers, and the ink roller Therefore, by adjusting the operation of the ink roller temperature raising device, the degree of adjustment of the humidity around the ink roller can be changed more closely. Therefore, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

In this case, if the ink roller temperature raising device is constituted by a water flow mechanism for passing warm water into the ink roller, the ink roller can be adjusted by adjusting the temperature of the warm water to be passed and the flow rate (amount per unit time). It becomes easy to reliably adjust the degree of temperature rise, and hence the degree of adjusting the humidity (claim 7).
Further, the ink roller temperature raising device has a simple configuration if the ink roller temperature rising device is configured by a swing mechanism that generates heat between the ink roller and other ink rollers that are in contact with each other by swinging the ink roller in the axial direction. The ambient humidity can be adjusted (claim 8).

  According to the inking device of the printing press of the present invention (Claim 9), the humidity adjusting fan is provided at the end of the humidity adjusting fan in the hollow portion of the humidity adjusting fan for adjusting the humidity in the space surrounded by the plurality of ink rollers. When the air is blown by the blower fan, the output of the humidity adjustment fan is changed not only by the rotation speed of the rotation shaft of the humidity adjustment fan corresponding to the operating speed of the printing press but also by the change of the blade pitch, It becomes possible to change the degree of humidity adjustment more closely. Therefore, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a first embodiment of the present invention will be described based on the drawings.
1 to 3 illustrate an inking device for a printing press according to a first embodiment of the present invention, which will be described with reference to these drawings.

First, the main part in a printing unit of a printing press equipped with an inking device will be described. As shown in FIG. 2, a dampening device (fountain solution supply device) 2 and an inking device are provided around the plate cylinder 1. An (ink supply device) 3 is provided.
The inking device 3 includes, from upstream, an ink fountain 8 as an ink supply source, an ink calling roller 17, an ink roller group 9, and an ink deposit formed by an ink source roller 10, an ink key 11, and a side plate (not shown). The roller 12 is provided.

In the ink fountain 8, the ink stored inside is supplied to the outer peripheral surface of the ink fountain roller 10 from the gap between each ink key 11 and the ink fountain roller 10 arranged in the bottom in the printing width direction. The ink is fed to the ink roller group 9 by an ink calling roller 17 that reciprocates between the ink roller 16 at the uppermost stream of the ink roller group 9 and the ink source roller 10.
The ink roller group 9 includes a large number of ink rollers 13 to 16 and 18 to 20, and some of these ink rollers knead ink in the axial direction and feed the ink downstream. . Finally, ink is supplied to the plate surface 1a mounted on the outer periphery of the plate cylinder 1 from a plurality of (here, four) ink form rollers 12 arranged around the plate cylinder 1. .

On the other hand, the dampening device 2 includes a water source roller 5 in which dampening water in the water boat 4 is immersed in the water boat 4, a water kneading roller 6 in contact with the water source roller 5, It is supplied to the plate surface 1 a of the plate cylinder 1 via a swim roller 7 that contacts the kneading roller 6.
The blanket on the outer periphery of the blanket cylinder (not shown) is in contact with the printing plate surface 1a of the plate cylinder 1, and the ink is transferred from the printing plate surface 1a to the printed material (printing paper). Is done from the surface.

Further, many of the plate cylinder 1, the blanket cylinder, the ink rollers of the ink roller group 9, and the rollers of the dampening device 2 usually rotate at a rotation speed corresponding to the printing speed.
Thus, the ink adhering to the surface of the inking device 3 that is close to the plate cylinder 1, and therefore close to the dampening device 2, etc., from the ink fountain 8 until it reaches here. Since moisture is added during the movement process and the humidification environment from the dampening device 2 is placed, the humidity tends to increase.

Therefore, a space surrounded by the ink rollers 13 to 15 is equipped with a humidity adjusting fan (dehumidifying fan) 21 that adjusts the humidity in the space.
As shown in FIGS. 1A to 1C, the humidity adjusting fan 21 is formed in a roller shape similar to an ink roller, and is provided with a wheel-like support member provided on both ends of a rotating shaft 25 via stays 24. 23 and 23 are provided with a plurality of variable pitch blades 27 supported at both ends. The rotary shaft 25 has a plate cylinder 1, a blanket cylinder, each ink roller of the ink roller group 9, each roller of the dampening device 2, etc., and a rotation speed corresponding to the printing speed (for example, the same speed as the plate cylinder 1, or The plate cylinder 1 rotates at a speed proportional to the rotation speed of the plate cylinder 1. Therefore, the rotary shaft 25 can be rotated using the same rotational drive source as that of each rotary member of these printing presses. In this embodiment, the rotary drive source of such a rotary member of the printing press is used. Suppose you are.

  Each variable pitch blade 27 is pivotally attached to both ends of the variable pitch blade 27 with respect to the support member 23 through pins 28 so that the blade angle α can be changed. However, a spring 29 is provided in a compressed state between the pin portion 29a provided to each blade 27 and the pin portion 29b provided to the support member 23, and the spring 29 pitches the blade 27 (blade angle). ) It is energizing in the direction of decreasing α. Further, the pin 28 is disposed closer to the rotary shaft 25 than the center of gravity G in the side view of the wing 27 [FIGS. 1B and 1C].

  Therefore, when the rotating shaft 25 of the humidity adjusting fan 21 rotates (rotation direction R), each blade 27 generates an air flow on the outer peripheral side thereof, and the air flow increases as the rotational speed of each blade 27 increases. As the pitch α becomes larger (of course, α <90 degrees), it becomes stronger. Since the wing 27 urged by the spring 29 in the direction in which the wing angle α decreases, the pin 28 which is a pivot point is disposed on the side of the rotation shaft 25 with respect to the center of gravity G in the side view. As the centrifugal force fc generated on the blade 27 increases and the centrifugal force fc overcomes the urging force of the spring 29, the pitch α of the blade 27 increases.

  Since the inking device of the printing press according to the first embodiment of the present invention is configured as described above, the rotational speed of the rotary shaft 25 of the humidity adjusting fan 21 corresponding to the operating speed of the printing press changes. In addition, the pitch α of the blades 27 also changes according to the rotation speed of the rotary shaft 25. For example, when the operation speed of the printing press increases and the rotation speed of the rotary shaft 25 of the humidity adjusting fan corresponding to this increases, the speed of the blade 27 increases. Therefore, as shown by the solid line in FIG. The air volume (wind speed) generated in the direction increases. In the case of the present humidity adjusting fan 21, in addition to this, when the rotational speed of the rotating shaft 25 increases, the pitch α of the blades 27 increases due to the centrifugal force fc, so that the air volume (wind speed) generated from the blades 27 in the outer circumferential direction. ) Increases, the air volume (wind speed) for adjusting the humidity increases with the characteristics shown by the broken line in FIG.

  Accordingly, the high speed operation of the printing press is performed while the dehumidification by the humidity adjusting fan 21 is set to a relatively low dehumidifying effect corresponding to the dehumidification request [that is, the air flow (wind speed) is suppressed] during the low speed operation of the printing press. In some cases, the dehumidifying effect of the humidity adjusting fan 21 is increased by the increase in the air volume (wind speed) due to the increase in the pitch α, so that it is possible to sufficiently satisfy the dehumidification requirement that is increased during high-speed operation of the printing press.

For this reason, it becomes possible to always manage the humidity of the ink in an optimum state, and it is possible to ensure good print quality.
In particular, in the present embodiment, a special drive source for changing the pitch α is obtained with an extremely simple configuration by arranging the pivot point 28 with respect to the center of gravity of the wing 27 and installing the spring 29 that biases the wing 27. It is characteristic that a desired dehumidifying effect can be obtained without providing it.
However, the mechanism for changing the pitch α is not limited to that of the present embodiment. The pitch α may be changed by an actuator.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
FIG. 4 illustrates an inking device for a printing press according to a second embodiment of the present invention, which will be described based on this drawing.

In this embodiment as well, the main part in the printing unit of the printing machine equipped with the inking device is configured as shown in FIG.
Also in this embodiment, a humidity adjusting fan (dehumidifying fan) 21A for adjusting the humidity in this space is provided in a space surrounded by the ink rollers 13 to 15 (see FIG. 2).
The humidity adjusting fan 21A of the present embodiment is different from the humidity adjusting fan 21 of the first embodiment in that the blades 27A are not the variable pitch blades 27 but fixed blades.

That is, as shown in FIG. 4, the humidity adjusting fan 21A is formed in a roller shape similar to the ink roller, and is provided on each of the wheel-like support members 23, 23 provided at both ends of the rotating shaft 25 via the stays 24. A plurality of fixed wings 27A supported at both ends are provided side by side.
The rotating shaft 25 is connected to the plate cylinder 1, the blanket cylinder, the ink rollers of the ink roller group 9, the rollers of the dampening device 2, and the like according to the printing speed via the transmission 30 (for example, the plate cylinder). 1 is connected to a rotating shaft 34 that rotates at a constant speed of 1 or a speed proportional to the rotating speed of the plate cylinder 1. Also in this embodiment, it is assumed that a rotation drive source of any rotary member of the printing press is used for the rotation of the rotary shaft 34.

  In this embodiment, a belt-type continuously variable transmission is employed as the transmission 30 provided between the rotary shaft 25 and the rotary shaft 34. The belt-type continuously variable transmission 30 includes pulley devices 31 and 32 having variable outer diameters respectively provided on the rotary shaft 25 and the rotary shaft 34, and a belt stretched between the pulley devices 31 and 32. Configured. Each pulley device 31, 32 has an opposed fixed sheave and a movable sheave movable in the direction of the rotation axis, and moves the movable sheave using hydraulic pressure or the like, thereby changing the effective diameter of each pulley, and rotating shaft The speed ratio between 25 and the rotating shaft 34 can be continuously changed.

Although not shown, the gear ratio of the continuously variable transmission 30 is controlled by the controller in accordance with the dehumidification request information.
Since the inking device of the printing press according to the second embodiment of the present invention is configured as described above, the belt type continuously variable transmission is performed while rotating the rotation shaft 34 at a rotation speed corresponding to the printing speed. Since the rotational speed of the rotary shaft 25 can be freely changed while appropriately changing the speed ratio by the machine 30, if the dehumidification request is high for the printing speed, the speed ratio is changed as shown in FIG. If the rotational speed of the rotary shaft 25 is increased and the air volume (wind speed) generated from the blade 27 in the outer circumferential direction can be increased, and if the dehumidification requirement is low for the printing speed, it is shown in FIG. Thus, the gear ratio can be lowered, the rotational speed of the rotary shaft 25 can be lowered, and the air volume (wind speed) generated from the blades 27 in the outer circumferential direction can be reduced.

For this reason, it becomes possible to always manage the humidity of the ink in an optimum state, and it is possible to ensure good print quality.
In particular, in the present embodiment, since the speed is changed by the continuously variable transmission 30, the rotational speed of the blade 27, that is, the air volume (wind speed) generated from the blade 27 in the outer circumferential direction can be freely adjusted, and the humidity It is possible to change the degree of adjustment in more detail.
However, as the continuously variable transmission 30, other types such as a toroidal type may be adopted, or a stepped transmission may be adopted.

[Third Embodiment]
Next, 3rd Embodiment of this invention is described based on drawing.
FIG. 5 illustrates an inking device for a printing press according to a third embodiment of the present invention, which will be described based on this drawing.

In this embodiment as well, the main part in the printing unit of the printing machine equipped with the inking device is configured as shown in FIG.
In this embodiment, any or all of the ink rollers 13 to 15 (see FIG. 2) are equipped with an ink roller temperature raising device as a countermeasure for humidity adjustment.
That is, as shown in FIG. 5, in this embodiment, any appropriate ink roller, for example, any or all of the ink rollers 13 to 15 (here, the ink roller 15 will be described), A water flow structure (not shown) that allows water to pass through is provided, and an ink roller temperature raising device is configured so that hot water circulates inside the roller and heats the roller surface through an external hot water supply / discharge device (not shown). Has been.

The humidity can be suppressed as the temperature of the roller surface is raised, but the degree of temperature rise of the roller surface can be changed by the amount of water flow (per unit time) and the temperature of the hot water to be passed. Therefore, although not shown here, the temperature state of the ink roller surface is changed by changing either or both of the water flow amount and the hot water, and the humidity suppression effect is adjusted.
Since the inking device of the printing press according to the third embodiment of the present invention is configured as described above, the temperature of the ink roller is increased by the ink roller temperature increasing device provided in the desired ink roller, and the ink is heated. Since the humidity around the roller can be adjusted, the degree of adjustment of the humidity around the ink roller can be precisely changed. Therefore, for example, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

  In the case of this embodiment, since the ink roller temperature raising device is constituted by a water flow mechanism for passing warm water into the ink roller, the temperature of the warm water to be passed and the amount of water flow (amount per unit time) Through the adjustment, it is possible to reliably adjust the degree of temperature increase of the ink roller, and hence the degree of adjusting the humidity.

[Fourth Embodiment]
Next, 4th Embodiment of this invention is described based on drawing.
FIG. 6 illustrates an inking device for a printing press according to a fourth embodiment of the present invention, which will be described based on this drawing.
In this embodiment as well, the main part in the printing unit of the printing machine equipped with the inking device is configured as shown in FIG.
In this embodiment, any or all of the ink rollers 13 to 15 (see FIG. 2) are equipped with an ink roller temperature raising device as a countermeasure for humidity adjustment.

That is, as shown in FIG. 6, in this embodiment, the ink roller is pivoted to any appropriate ink roller, for example, any or all of the ink rollers 13 to 15 (here, the ink roller 15 will be described). The ink roller temperature raising device is constituted by a swinging mechanism that generates heat between other ink rollers that are in contact with each other by swinging in the direction.
However, the rocking here is not for kneading ink but for raising the temperature of the roller surface, and therefore, it is swung at a higher speed than the rocking speed of the kneading roller.

When two or more rocking speeds of the kneading roller are provided, this is particularly true if the kneading roller arranged facing the humidity adjustment space surrounded by the rollers is swung at high speed. The roller surface of the kneading roller rises in temperature and plays a role of adjusting (suppressing) humidity by raising the temperature of the space.
Further, the humidity can be suppressed as the temperature of the roller surface is raised, but the degree of temperature rise of the roller surface can be changed by the swing speed of the ink roller in the axial direction. Therefore, although not shown here, the temperature state of the ink roller surface is changed by changing the swinging speed of the ink roller in the axial direction to adjust the humidity suppression effect.

  Since the inking device of the printing press according to the fourth embodiment of the present invention is configured as described above, the ink roller temperature raising device provided in the desired ink roller can be used for the ink as in the third embodiment. Since the temperature of the roller rises and the humidity around the ink roller can be adjusted, the degree of adjustment of the humidity around the ink roller can be precisely changed. Therefore, for example, it is possible to dehumidify the ink to an appropriate level with respect to the ink dehumidification request corresponding to the printing speed or the like.

That is, when the temperature of the roller surface rises, evaporation of moisture in the ink on the roller surface can be promoted. In addition, since the dew point increases as the temperature rises in the space surrounded by the plurality of rollers, moisture adsorption on the roller surface can be suppressed.
In the case of this embodiment, the ink roller temperature raising device is configured by a roller swing mechanism that generates heat between the ink rollers, so that the humidity around the ink roller can be adjusted with a simple configuration. Become.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to the drawings.
FIG. 7 illustrates an inking device for a printing press according to a fifth embodiment of the present invention, which will be described based on this drawing.
In this embodiment as well, the main part in the printing unit of the printing machine equipped with the inking device is configured as shown in FIG.
In the present embodiment, the humidity adjusting fan (dehumidifying fan) provided in the first embodiment in order to adjust the humidity in the space surrounded by the ink rollers 13 to 15 (see FIG. 2). 21 or the humidity adjusting fan (dehumidifying fan) 21A provided in the second embodiment.

In the case of this embodiment, the blower fan 40 which blows air into the hollow part 26 which has the outer side of the rotating shaft 25 of the humidity adjusting fans 21 and 21A and the inside of the blades 27 and 27A at the ends of the humidity adjusting fans 21 and 21A. have.
In other words, when air is blown into the hollow portion 26 by the blower fan 40, the air volume (wind speed) generated in the outer circumferential direction of the blades 27 and 27A can be increased. Here, the controller according to the dehumidification request information It is assumed that the operation and stop of the blower fan 40 and the air volume (wind speed) during operation are controlled.

  Since the inking device of the printing press according to the fifth embodiment of the present invention is configured as described above, when the rotary shaft 25 rotates at a rotation speed corresponding to the printing speed, the rotation speed of the blade 27 is increased. In addition to the change in the air volume (wind speed) from the corresponding blade 27 and the change in the air volume (wind speed) from the blade 27 according to the pitch change of the blade 27 according to the rotation speed, in the case of the blade 27A, according to the rotation speed. In addition to the change in the air volume (wind speed) from the blades 27A, the change in the air volume (air speed) from 27A according to the air volume (air speed) of the blower fan 40 can be obtained. Can be managed, and good print quality can be ensured.

In particular, if the blower fan 40 of this embodiment is applied to the humidity adjusting fan (dehumidifying fan) 21 of the first embodiment, the degree of humidity adjustment can be changed more precisely.
Further, even if the blower fan 40 of this embodiment is applied to the humidity adjusting fan (dehumidifying fan) 21A of the second embodiment to which the transmission of the second embodiment is applied, the degree of humidity adjustment is more precise. It is possible to change.

[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described with reference to the drawings.
FIG. 8 illustrates an inking device for a printing press according to a sixth embodiment of the present invention, which will be described based on this drawing.
In this embodiment as well, the main part in the printing unit of the printing machine equipped with the inking device is configured as shown in FIG.
In the present embodiment, the humidity adjusting fan (dehumidifying fan) 21 provided in the first embodiment or the humidity adjusting fan (dehumidifying fan) 21A provided in the second embodiment is provided. .

  As shown in FIG. 8, in this embodiment, the ink rotor 15 in the middle flow area of the ink roller group 9 is provided with a second ink fountain 108 different from the uppermost ink fountain 8. Also in the ink fountain 108, the ink stored in the ink fountain 108 is supplied to the outer peripheral surface of the ink fountain roller 110 from a gap between each ink key 111 and the ink fountain roller 110 arranged in the bottom in the printing width direction. The ink roller group 9 is supplied to the ink roller group 9 by an ink calling roller 117 that reciprocates between the ink roller 15 and the ink source roller 110 in the middle stream area of the ink roller group 9. However, the ink fountain 108 is sealed with a lid 112.

  The ink supply amounts from the ink fountain 8 and the ink fountain 108 are controlled in cooperation. That is, the ink from the ink fountain 8 tends to have high humidity due to the length of the supply path, and becomes relatively high humidity ink as it approaches the plate cylinder 1, but the ink fountain 108 has a length of the supply path. In addition to being short, since it is sealed with the lid 112, the amount of inflow of moisture is small, and even when approaching the plate cylinder 1, the ink has a relatively low humidity. Therefore, the ink supply amounts from the ink fountain 8 and the ink fountain 108 are controlled in conjunction with each other according to the required ink moisture amount.

  Specifically, the ink supply amount control may be any one of the opening control of the ink key 111, the rotational speed control of the ink base roller 110, the reciprocating speed control of the ink calling roller 117, or a combination thereof. Since the control can be performed uniformly in the printing width direction, the rotational speed control of the ink source roller 110 can be performed without using the opening control of the ink key 111 that can partially change the ink supply amount in the printing width direction, or The reciprocating speed control of the ink calling roller 117 is considered preferable.

Since the inking device of the printing press according to the sixth embodiment of the present invention is configured as described above, in addition to the effects of the first and second embodiments, the amount of ink supplied from the ink fountain 8 and the ink fountain 108 The humidity of the ink supplied to the plate cylinder 1 can be adjusted more appropriately while controlling the above in cooperation.
Accordingly, the ink can be appropriately adjusted to the required humidity state, which can contribute to the improvement of the print quality.

  In the present embodiment, the humidity adjusting fan (dehumidifying fan) 21 provided in the first embodiment or the humidity adjusting fan (dehumidifying fan) 21A provided in the second embodiment is equipped. Although the second ink fountain 108 is added, the humidity of the ink supplied to the plate cylinder 1 can be adjusted more appropriately just by adding the second ink fountain 108, which is effective.

[Others]
As mentioned above, although each embodiment of the present invention was described, the present invention is not limited to such an embodiment, and can be appropriately modified and implemented without departing from the gist of the present invention.
In other words, the present invention provides a humidity adjusting device that is arranged in a space surrounded by a plurality of ink rollers in the ink roller group and adjusts the humidity in the space. The ink may be dehumidified to an appropriate level for the ink dehumidification request corresponding to the above, and the present invention is not limited to the above embodiment.

Moreover, you may combine the principal part or all of said each embodiment suitably.
For example, the humidity adjusting fan having the variable pitch blades of the first embodiment is combined with the transmission of the second embodiment, and further the air blowing fan 40 of the fifth embodiment is combined, and the ink roller without the humidity adjusting fan is provided. For example, it is also conceivable to apply the ink roller temperature raising device of the third embodiment and / or the fourth embodiment and further apply the second ink fountain 108 of the sixth embodiment.

Of course, it is not necessary to combine all the embodiments in this way.
Further, the present invention can be applied to various printing machines equipped with such an inking device.

It is a figure which shows the principal part (one end part) of the humidity control fan concerning 1st Embodiment of this invention, Comprising: (a) is the perspective view, (b) is the side view, (c) is the side view. It is a principal part enlarged view. It is a block diagram which shows the principal part in the printing unit of the printing machine provided with the inking apparatus concerning 1st Embodiment of this invention by a side view. It is a graph which shows the effect of the humidity control fan concerning a 1st embodiment of the present invention. It is a perspective view which shows the principal part (one end part) of the humidity control fan concerning 2nd Embodiment of this invention, (a) shows a low gear ratio (low speed) state, (b) has a high gear ratio ( High speed) state. It is a perspective view which shows the ink roller concerning 3rd Embodiment of this invention. It is a perspective view which shows the ink roller concerning 4th Embodiment of this invention. It is a perspective view which shows the principal part (one end part) of the humidity control fan concerning 5th Embodiment of this invention. It is a block diagram which shows the principal part in the printing unit of the printing machine provided with the inking apparatus concerning 6th Embodiment of this invention by a side view.

Explanation of symbols

1 Plate cylinder 1a Plate surface 2 Dampening device (dampening water supply device)
3 Inking device (ink supply device)
DESCRIPTION OF SYMBOLS 4 Water boat 5 Water source roller 6 Water kneading roller 7 Water roller 8 Ink fountain as ink supply source 9 Ink roller group 10 Ink source roller 11 Ink key 12 Ink roller 13-16, 18-20 Ink roller 17 Ink roller 17 21,21A Humidity adjustment fan (dehumidification fan)
DESCRIPTION OF SYMBOLS 23 Wheel-shaped support member 24 Stay 25 Rotating shaft 26 Hollow part 27 Variable pitch wing | blade 27A Fixed wing | blade 28 Pin 29 Spring 29a, 29b Pin part 30 Belt type continuously variable transmission 31, 32 Pulley device 33 Belt 34 Rotating shaft 40 Fan fan 108 Second ink fountain 110 Ink base roller 111 Ink key 112 Lid 117 Ink call roller

Claims (9)

In an inking device of a printing press having an ink roller group,
An inking device for a printing press comprising a humidity adjusting device that is arranged in a space surrounded by a plurality of ink rollers in the ink roller group and adjusts humidity in the space. The humidity adjusting device includes a humidity adjusting fan,
The humidity adjusting fan is a wing that blows air around a rotating shaft that rotates according to the rotation speed of the ink roller group, and a variable pitch that changes in pitch according to the rotation speed of the rotating shaft. 2. The inking device for a printing press according to claim 1, further comprising a wing. The variable pitch blades are pivotally supported by a support coupled to the rotating shaft, and are urged by a spring in a direction to reduce the pitch, and the variable pitch blades are variable by centrifugal force generated by rotation of the rotating shaft. 3. The inking device for a printing press according to claim 2, wherein the pivot point is arranged so that the pitch of the pitch blade is increased. With a humidity adjustment fan,
The humidity adjusting fan is rotationally driven via a transmission with respect to a rotating shaft that rotates in accordance with the rotation speed of the ink roller group, and the transmission can be controlled based on the humidity state in the space. The inking device for a printing press according to claim 1, wherein the inking device is provided. 5. The inking device for a printing press according to claim 4, wherein the transmission is a continuously variable transmission. The humidity controller includes an ink roller temperature increasing device that adjusts the humidity around the ink roller by increasing the temperature of any ink roller in the ink roller group. 2. An inking device for a printing press according to 1. The inking device for a printing press according to claim 6, wherein the ink roller temperature raising device is constituted by a water passage mechanism for passing warm water into the ink roller. The ink roller temperature raising device includes a swing mechanism that generates heat between the ink roller and another ink roller that is in contact with the ink roller by swinging the ink roller in an axial direction. 6. An inking device for a printing press according to item 6. The humidity adjusting device includes a humidity adjusting fan,
The humidity adjusting fan has a blade that blows air around the rotating shaft that rotates in accordance with the rotation speed of the ink roller group, and has a hollow portion inside the blade, and the humidity adjusting fan The inking device for a printing press according to claim 1, further comprising a blower fan that blows air into the hollow portion at an end of the printer.

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