JP2880071B2 - Ventilation equipment for printing room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating facility for a printing plant or the like, and more particularly, to exhausting an organic solvent vaporized from an ink pan of a rotary press without diffusing into a room.

[0002]

2. Description of the Related Art A large rotary press installed in a printing plant consumes a large amount of ink and contains a large amount of organic solvents. Often subject to restrictions. FIG. 2 is an explanatory view showing a conventional printing room ventilation system in which a rotary press is installed. A rotary press 3 is installed in the printing room 1. The rotary press 3 has an exhaust pipe 5 through which air containing an organic solvent (mainly, toluene) is directly exhausted.
have. The printing room 1 is provided with an air conditioner 11 connected to an air supply port 9 opened to the ceiling surface 7, and the air conditioner 11 does not collect air from room air, but supplies air with fresh air. ing. On the other hand, an exhaust port 13 is opened in the ceiling surface 7, and the exhaust port 13 is extended to the roof via an exhaust duct 17 having a first exhaust fan 15.
9 is connected. The exhaust pipe 5 of the rotary press 3 described above is connected to the exhaust main duct 19, and the organic solvent from the exhaust pipe 5 is exhausted to the exhaust main duct 19 by driving the second exhaust fan 21.

[0003]

In the rotary press 3, ink is usually stored in an ink pan 23 below the rotary press 3, and the ink pan 23 is open to the room. Therefore, the organic solvent vaporized from the ink pan 23 is
Separately from the exhaust pipe 5, it was discharged into the printing room 1 from a gap or the like in the rotary press 3. And the organic solvent released into the air is
It was stirred and diluted by the air blown out from the air supply port 9, and was exhausted from the exhaust main duct 19 via the exhaust port 13. However, since the organic solvent has a large specific gravity with respect to air and stagnates in the lower part of the printing room 1, it is extremely difficult to temporarily dilute the organic solvent with the air blown out from the air supply port 9 and exhaust it through the exhaust port 13 of the ceiling surface 7. The efficiency was poor, and the organic solvent was unnecessarily diffused, and it was difficult to satisfy the operation standard (organic solvent concentration: 100 ppm) in the printing room 1. The present invention has been made in view of the above circumstances, and provides a ventilation device for a printing room that can efficiently exhaust an organic solvent having a higher specific gravity than air without diffusing it into the printing room. The purpose is to improve the environment.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and stores an ink containing an organic solvent in an ink pan, wherein the ink pan is stored in an open state. A rotary press is installed in a printing room, and an air supply duct of an air conditioner in which all of the air supply is fresh air is connected to the printing room, and an exhaust main duct is connected to the printing room. The ink pan in the rotary press
Above the ink pan so as to cover the ink pan with a gap in between.
Suction hood and one end connected to the suction hood
With the other end connected to the main exhaust duct
The duct communicates with the printing room and the rotary press.
The rotary press is located near the suction hood.
An air inlet formed in the outer surface and the air supply duct of the air conditioner
The end of the ring is used as a local air supply port.
A configuration with an extension duct opened near the turning point
Has adopted.

[0005]

In the ventilation equipment for a printing room having the above configuration,
Is the suction hood provided above the ink pan and
By performing suction and exhaust through the connected exhaust duct
As a result, the inside of the rotary press becomes negative pressure. At this time, the extension duct station
Fresh air supplied from the air supply port is installed on the outer surface of the rotary press.
Suction from the printing room into the rotary press
You. As a result, the local air supply port and the suction
Since airflow is generated between the air holes and the pores, the airflow rotates
The leakage and diffusion of the organic solvent from the machine to the printing room are prevented.
Also, inside the rotary press, the air flows from the intake port to the suction hood.
Due to the air flow, the organic solvent vaporized from the ink pan
The agent is sucked into the suction hood by the airflow and exhausted.
The air is exhausted through the duct.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the ventilation equipment for a printing room according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the ventilation equipment for a printing room of the present invention. The printing press 1 is provided with a rotary press 25, and the rotary press 25 has an exhaust pipe 5 through which air containing an organic solvent is directly exhausted. The printing room 1 is provided with an air conditioner 11 connected to an air supply port 9 opened to the ceiling surface 7, and the air conditioner 11 does not collect air from room air, but supplies air with fresh air. ing. On the other hand, an exhaust port 13 is opened in the ceiling surface 7, and the exhaust port 13 is connected to an exhaust main duct 19 extended to the roof via an exhaust duct 17 having a first exhaust fan 15. The exhaust main duct 19 is connected to the exhaust pipe 5 of the rotary press 25 described above, and the organic solvent from the exhaust pipe 5 is supplied to the second exhaust fan 2.
The exhaust gas is exhausted to the exhaust main duct 19 by the driving of the motor 1. The above configuration is substantially the same as the conventional configuration.

[0007] An extension duct 29 is branched into an air supply duct 27 connecting the air supply port 9 and the air conditioner 11.
Has a pair of local air supply ports 31 opened near the rotary press 25. Above the ink pan 23 inside the rotary press 25, a suction hood 33 that covers the ink pan 23 with a slight gap therebetween.
Is provided therein, and the suction hood 33 is capable of efficiently sucking the organic solvent vaporized from the upper opening of the ink pan 23. A suction chamber 35 is connected to the suction hood 33, and the suction chamber 35 performs uniform suction from the suction hood 33. An exhaust duct 37 is provided in the intake chamber 35.
Is connected, and the exhaust duct 37 projects outside the rotary press 25. The suction hood 33 and the suction chamber 3
5. The exhaust duct 37 is assembled in advance when the rotary press 25 is assembled.

An equipment pit 41 is constructed on the floor 39 of the printing room 1 and extends from the rotary press 25 to the wall of the printing room 1. An exhaust duct 37 from the rotary press 25 is extended and inserted into the equipment pit 41,
The exhaust duct 37 is connected to the main exhaust duct 19. A third exhaust fan 43 is provided in the exhaust duct 37, and the third exhaust fan 43 conveys exhaust gas in the intake chamber 35 to the main exhaust duct 19. In addition, an intake hole 45 communicating with the inside is formed on the outer surface of the rotary press 25, and the intake hole 45 can introduce indoor air into the vicinity of the suction hood 33 inside the rotary press 25. Therefore, the exhaust amount Q is exhausted from the exhaust trunk duct 19 to the outdoors, the exhaust amount to Q ₁ from the exhaust port 13, the exhaust amount Q ₂ from the exhaust pipe 5, the exhaust amount Q ₃ from the suction hood 33 Sum (Q = Q ₁ + Q ₂ +
Q ₃ ), and the air conditioner 11 can supply the same amount of supplied air Q to the printing room 1. Local air supply port 3
1. Suction hood 33, exhaust duct 37, equipment pit 4
The first and third exhaust fans 43 and the intake holes 45 are used as main members or parts to constitute a printing room ventilation facility 47 according to the present embodiment.

[0009] The ventilation equipment 4 for the printing room configured as described above.
The operation of No. 7 will be described. When the air conditioner 11 is driven, fresh air whose temperature is adjusted is blown out from the air supply port 9 and the local air supply port 31. On the other hand, the air in the rotary press 25 is sucked and exhausted from the suction hood 33 by the driving of the third exhaust fan 43.
Then, the inside of the rotary press 25 becomes a negative pressure. When the inside of the rotary press 25 becomes a negative pressure, the room air is sucked into the rotary press 25 from the intake hole 45.
Air flow between the local air supply port 31 and the air inlet 45
Occurs. The direction of this air flow is vaporized from the ink pan 23.
The organic solvent that is going to diffuse around the rotary press 25
The direction is opposite to the direction. Thereby, around the rotary press 25
Organic solvent is forcibly prevented.
In the rotary press 25, the suction hood 33 is used.
Due to the suction action, an airflow is generated from the suction hole 45 toward the suction hood 33 . Due to the generation of this airflow, the organic solvent vaporized from the ink pan 23 is sucked by the suction hood 33 at the extreme end distance.
And is exhausted through the exhaust duct 37. this
At this time, the airflow from the intake hole 45 to the suction hood 33 is
The air flow between the local air supply port 31 and the air intake hole 45 is continuous.
The fresh air supplied from the local air supply port 31
Contains a lot of air. Therefore, in the rotary press 25,
The organic solvent vaporized from the nukipan 23 is supplied to the local air supply port 31.
Hood 3 using fresh air supplied from
3 is efficiently sucked.

As described above, the ventilation equipment 4 for the printing room of the present embodiment is used.
In FIG. 7, an axle stored in the rotary press 25 in an open state is provided.
The organic solvent vaporized from the ink pan 23 becomes the ink pan 2
Efficiently by suction hood 33 provided above
The air is sucked and exhausted through the exhaust duct 37.
You. In addition, around the rotary press 25, the local air supply port 31
The supplied fresh air is sucked into the rotary press 25 from the intake hole 45.
Organic solvent vaporized from the ink pan 23
Does not leak around the rotary press 25. to this
Efficiently directs the organic solvent from the ink pan 23
The organic solvent concentration can be easily adjusted to environmental
It becomes possible to reduce it within the standard. Also, in the unlikely event that a rotary press
Even if the organic solvent leaks around 25,
From the air supply port 31 to the suction hood 33 through the air inlet 45
The organic solvent is sucked into the rotary press 25 by the air current, and is sucked.
Can be exhausted to the outside via the hood 33
The organic solvent diffuses or stagnates in the printing room 1
Nothing.

[0011]

As described above, the printing according to the present invention is performed.
According to the room ventilation system, it was installed above the ink pan
Suction hood and exhaust duct connected to the suction hood
While the extension duct is open near the rotary press.
Supplying fresh air from the
The air in the printing room containing a large amount of
With organic solvent that is sucked into and vaporized from the ink pan
Both are efficiently sucked into the suction hood.
This allows the organic solvent vaporized from the ink pan to be transferred to the rotary press.
Do not leak around the printer or diffuse into the printing room.
Because the air can be exhausted efficiently, the environment inside the printing room can be improved.
Can be up. Also supplied from local exhaust
Fresh air does not merely maintain the cleanliness of indoor air.
And also serves as a carrier to transport organic solvents to the suction hood.
Therefore, fresh air can be used without waste.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the ventilation equipment for a printing room of the present invention.

FIG. 2 is an explanatory diagram showing a conventional printing room ventilation system in which a rotary press is installed.

[Explanation of symbols]

 1 Printing Room 11 Air Conditioner 19 Exhaust Main Duct 23 Ink Pan 25 Rotary Press 27 Air Supply Duct 31 Local Air Supply 33 Suction Hood 37 Exhaust Duct 39 Floor 41 Equipment Pit 45 Intake Hole 47 Ventilation Equipment for Printing Room

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B41F 33/00 B41F 13/00 B41F 31/00 B24F 7/06 101

Claims (1)

(57) [Claims] 1. An air conditioner in which an ink containing an organic solvent is stored in an ink pan, a rotary press in which the ink pan is housed in an open state is installed in a printing room, and all air supply is fresh air.
The air supply duct is connected to the printing room, and the main exhaust duct is connected to the printing room. In the ventilation equipment for a printing room, the ink is provided above the ink pan in the rotary press.
Suction hood provided to cover bread with a gap
And one end is connected to the suction hood and the other end is
An exhaust duct connected to the main exhaust duct, which communicates between the printing room and the rotary press.
Formed on the outer surface of the rotary press near the suction hood
Air inlet and a branch from the air supply duct of the air conditioner.
As a local air supply port, which is opened near the rotary press.
Ventilation printing chamber, characterized in that a long duct.