JPS6054852A - Local exhauster for gravure printer - Google Patents

Abstract

PURPOSE:To exactly exhaust toxic gas from an ink pad portion by connecting plural exhaust ducts to the opening of the ceiling plate of a flat-plate hood through a separator for gas and ink. CONSTITUTION:A long opening 13 is drilled in the ceiling plate 7 of a flat-plate hood and connected to a gas-liquid separation chamber 14 where gases are separated from ink and also led to a discharge chamber 16 through plural small- diameter exhaust ducts 15. When a suction fan on the downstream side of the main duct 17 is actuated, toxic gases in and near an ink pad 5 surrounded by closed walls 11 and 12 are discharged effectively to the main duct 17 through the opening 13 and the ducts 15. Ink leaked is separated in the gas-liquid separation chamber 14 and recovered in an ink receiving box 18. The operability, maintainability and inspectability of the printer can be raised.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a shoulder exhaust device for a gravure printing machine, which is provided in an ink butt section of a gravure printing machine.

[Prior art]

Since ink for gravure printing uses an organic solvent such as toluene as its solvent, the organic solvent poisoning prevention regulations require that a local exhaust system be provided around the ink pad.

In order to improve workability, conventional local exhaust systems employ a downward suction system in which a bit is recessed in the machine installation surface and a grid is attached to the opening of the pit, and a downward suction system is used to draw air into the pit, or a It was a side suction type with a suction duct inlet.

However, in order to efficiently draw suction from the entire ink vat, the so-called control distance is long, so the specified control air speed (
0.5 m/see), it was necessary to increase the suction capacity, which was uneconomical.

On the other hand, as shown in FIG.
, (101) are arranged above, and the lower cylinder (100
There is a structure in which a suction duct 1-(103) extending along the entire lateral length of the isokubaso I-(102) in which a part of the water is immersed is attached, and this suction duct is communicatively connected to the main duct 11104).

This allowed air to be taken in efficiently from the entire Ink Paso I-(102), and there was no need to increase the wind speed. However, since the suction duct (103) is located on the working side, it obstructs the operator's field of view, which has another disadvantage of poor workability. Also, cylinder (100) '+ (101) and ink vat (10
When replacing 2), it is necessary to release the suction duct (103) upward or remove it, and when restarting the operation, the suction duct (103) must be removed.
03) is used without being properly positioned, there is also the problem that suction cannot be performed at the specified wind speed.

In order to solve the above problems, a double hood type as shown in FIG. 2 has recently been developed. This is done by installing a hood (105) on the ship's wall using an elevating mechanism (10G) so that it can be raised and lowered by 4 mm, and attaching a duct (105) to the side of the hood (105).
7) is configured to be detachably attached. Although such a configuration is considered to be optimal because it can uniformly suck the ink from the entire opening area of the ink cartridge 1-(102), the following problems still remain.

First, when replacing the cylinders (100), (101) and ink cartridge (102), after removing the duct (107) from the hood (105),
The disadvantage is that the hood (105) must be lowered, which reduces work efficiency. Further, when the ink vat (102) is taken out, ink tends to leak, and this leaked ink may accumulate in the hood (105). In this case, since a flow rate adjustment plate is provided on the surface of the hood (105) to equalize the amount of suction air, cleaning the leaked ink is also complicated, resulting in a decrease in the operating rate.

[Purpose of the invention]

An object of the present invention is to ensure that toxic gas can be discharged from the ink buff 1 to 1, and to improve workability and maintenance and inspection efficiency.

[Structure of the invention]

The configuration of the present invention is that, in a local exhaust system for a gravure printing press, a hood top plate with an opening is formed into a flat plate shape, and a plurality of discharge ducts 1- are provided in the opening of the hood top plate with separate rakes for separating gas and ink. They are connected in communication with each other.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

3 is a plan view schematically showing the local exhaust system (A) according to the present invention, FIG. 4 is a partially cutaway side view of the same, and FIG. 5 is a front view taken along the line I-1 in FIG. 3. be. - In the figure, (1) is the machine frame of a gravure printing machine installed on the floor (G), with cylinders (21, +3) rotatably attached to both the upper and lower sides, and the cylinders (21, [3) ), the film (F) is supplied to the drying box (4).

(5) is a dish-shaped ink pad that stores the ink (1) inside, and is removably connected to the hood top plate (7) forming the lower limit of the exhaust space by means of a pedestal (6).

The hood top plate (7) has a flat plate shape and has a receiving frame (I2) on its underside.
), and the receiving frame (8) is attached with a movable shaft (9) that can be moved up and down by being connected to a lifting mechanism such as a fluid cylinder.

This movable shaft (9) allows the ink pipe 151 to move forward and backward in the direction of the cylinder t2L (3), partially immersing the lower cylinder (3) and
) When replacing, the cylinder (3) can be lowered and taken out to the side.

0ω is a doctor that removes excess ink on the non-operating side, and the hood top plate (7) on the 0ω position side of the doctor is equipped with a rear shielding wall <1
1) is rotatably erected, and the other end has a front shielding wall (1).
2) is attached so that it can be expanded and contracted.

This front blocking wall (12) has second parallel frames (12c) at both ends of the first frame (12a) as shown in FIG.
, (12d), and a second parallel frame (12c),
A slider (12e) that can be slid on the third frame (12b) is provided at the upper end of (12d), and it is constructed so that it can be reduced in the direction of the arrow in the figure. Just do it. Also, as shown in Figure 7, a cover (12f) made of plastic or metal plate is attached to the third frame (
12b). In any case, the front shielding wall (12) may be one that can be expanded or contracted, for example, it can be configured such that the cover can be attached or removed by latching both sides of the machine frame (1). Also, the ink pad (5) can be easily replaced.

The hood top plate (7) has a long opening (
13) is opened in the longitudinal direction of the hood top plate (7), and a gas-liquid separation chamber (14) serving as a separator for separating gas and ink, which communicates with the opening (13), is connected in a hanging manner. A plurality of flexible small-diameter discharge ducts (15) are connected in communication with this gas-liquid separation chamber (14).
) by InkPaso I-(51 parts printed on the installation surface (
G) is in communication with the evacuation chamber (16) located above.

As is clear from Fig. 3, the discharge chamber (16) connects the ends of a plurality of discharge ducts (15) to converge the discharge flow path, and connects the main discharge chamber (16) provided outward from the installation line of the machine frame (11). duct) (17) are connected and connected to each other duct 1 (17)
It forms a communication flow path to.

At the lower end of the gas-liquid separation chamber (14), an ink receiving box (18) is installed in the form of a drawer so that it can be taken out to the outside, facing the opening (13), and is connected to the discharge duct (15). Sekiguchi (15a) is provided above this ink receiving box (18). Further, (19) is a guide plate for exhaust gas disposed on the side of the communication gate (15a), and serves to bend the flow line of the gas into a U-shape.

In the above configuration, by driving a suction fan (not shown) provided on the downstream side of the main duct (17),
This suction force allows the toxic gas near the ink bath T-(5) to be discharged toward the main duct I-(17).

Front and rear blocking walls (11) are in front of the ink bat (5),
(12), the machine frame (11) is located on both sides, forming a double box structure that substantially includes the lower part of the ink vat (5).

Therefore, since the ink path (51) is surrounded, streamlines are formed to bend the toxic gas released from the ink vat (5) downward from the upper end surface of the ink vat (5). The gas-liquid separation chamber (14) can be efficiently sucked while drawing.

In the gas-liquid separation chamber (14), overflowing ink induced into the exhaust gas flow and ink leaking when the impat (5) is removed are collected in the ink receiving box (18). This is because a guide plate (19) is provided inside the gas-liquid separation chamber (14), so that when the ink flows downward during inflow, only the ink stays in the ink receiving box (18) due to inertia based on the mass of the ink droplets. This is because the 1-no-1 gas flows around the guide plate (19) and continuously flows down to the discharge duct (15).

As described above, all the ink flowing down along the exhaust gas flow is captured in the gas-liquid separation chamber (14), so it does not reach the downstream side of the exhaust duct (I5), and the flow path due to curing is prevented. No shrinkage occurs and reduction in suction ability can be prevented.

Furthermore, since a plurality of discharge ducts (15) are provided and an opening (13) is provided in the hood top plate (7) so as to extend approximately the entire length of the ink vat (5), uniform suction can be achieved. can. Since the pipe diameter of the discharge duct (15) is small, the cylinder +21. When replacing the +31 and the ink vat (5), the hood top plate (7) can be easily lowered, improving work efficiency. Since this discharge duct (15) is made of a small-diameter flexible pipe, even if the elevating mechanism of the top plate hood (7) is complicated, the piping can be sewn to improve installation workability. You can also do it.

In addition, during the above replacement work and installation work, the exhaust duct! - (15) and the gas-liquid separation chamber (14) can be carried out without disconnecting, so maintenance and inspection can be made easier.

Moreover, the height dimension of the connection side of the discharge duct (1-H5) of the discharge chamber (16) is formed to be small, so that it can be inserted into the bottom area of the gravure printing machine, thereby reducing the capacity of the apparatus. It can be easily adapted to any type of machine.

The separator is not limited to the gas-liquid separation chamber (14), but a filter or strainer (S) or the like may be detachably attached to the connecting portion of the discharge duct I-(15) as shown in FIG. This filter or strainer (S) can capture one additional ink, and the discharge duct l-(15
) can be prevented from occurring.

In addition, the openings (13) are not limited to long ones extending along the longitudinal direction of the hood top plate (7), but are plural in number at the required pitch in the longitudinal direction of the hood top plate (7), as shown in FIG. small hole (13
') and a gas-liquid separation chamber (14') may be installed so as to communicate with each small hole (13').

〔effect〕

The present invention achieves the following effects with the above configuration.

() Since the discharge duct is connected to the hood top plate below the ink chamber throat, the duct does not protrude into the operator's work surface and does not interfere with the operator's work.

(2) Since the hood top plate is flat, there is no problem in inserting and removing cylinders or ink bats when replacing them, and work efficiency is improved compared to conventional side suction hoods. The lifting stroke can be reduced by /IX, and the height of the device can be reduced.

(3) Since the discharge duct is connected to the bottom surface of the hood top plate, there is no need to disassemble the duct when replacing the duct in (2) above, and work efficiency is higher than conventional methods, making maintenance and inspection easier. be.

(4) Since multiple discharge ducts are provided, the inkpaso [・
The controlled wind speed in the long side direction can be maintained uniformly.

(5) Since the separator is provided to prevent ink from flowing down into the duct, the discharge flow path will not be reduced and the suction capacity will not be reduced.

(6) Since the duct is a small-diameter flexible tube, it can be easily installed even if the mechanism for raising and lowering the hood top plate is complicated.

[Brief explanation of drawings]

1 and 2 are a perspective view and a side view schematically showing the main parts of a conventional local exhaust system, FIG. 3 is a plan view schematically showing a local exhaust system according to the present invention, and FIG. Same part cutaway side view,
Fig. 5 is a front view taken along the line l-1 in Fig. 3, Fig. 6 is a perspective view showing an example of the front blocking wall, and Fig. 7 is a side view showing another example of the front blocking wall. FIG. 8 is a side view showing another example of the separate rake, and FIG. 9 is a perspective view showing another example of the opening of the hood top plate. (11 Machine frame (21, (3) Cylinder (5) Ink butt (6) Frame (7) Hood top plate (8) Receiving frame (9) Movable shaft α0) Doctor (11) Rear shielding wall (12) Front Closing wall (13) Opening (14) Gas-liquid separation chamber (separator) (15) Discharge duct h (16) Discharge channel (17)
Main duct (18) Ink receiver box (19) Guide plate (F)
Film (G) Floor surface (S) Stainless steel (Separator) Patent applicant Sanyo Sanyo Sangyo Co., Ltd. Agent Masuku Tegori and 2 others) Figure 1 Figure 2 Figure 9 Figure 5 Figure 6

Claims (1)

[Claims] 1. A flat plate-like hood top plate that is removably installed below the ink vat and can be raised and lowered, and a plurality of flexible discharges connected to the openings in the hood top plate and connected to the suction source side. 1. A local exhaust system for a gravure printing press, comprising: a duct; and a separator for separating gas and ink, which is detachably provided at a connecting portion between the opening of the hood top plate and the discharge duct.