JPH09290501A - Dust collector for printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discard or circulate and reutilize a strike-through preventing powder while keeping the beutification and sanitation of a worker or on-the-spot environment. SOLUTION: A dust collector is equipped with the casing 1 attached on the upper surface of the housing 10 of a printing press having a spray 18 spraying a strike-through preventing powder 17 provided therein in a placing state, the fan 35 provided in the casing 1, the motor 36 driving the fan 35 and a filter 28 collecting scattered excessive powder 17. In this case, an automatic discharge means E discharging the powder 17 collected by the filter 28 to the outside is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector for a printing machine, which is mounted on the printing machine for use.

[0002]

2. Description of the Related Art Conventionally, in a printing process, a show-through prevention powder is sprayed on the surface of a printed paper so that ink does not adhere to the back surface of another printed paper even when the printed papers are stacked. Therefore, the extra powder scattered during the spraying is sucked into the dust collector, and the powder is collected by the filter in the dust collector and stored in the storage chamber.

[0003]

However, in the conventional dust collector, the powder is stored in the drawer-shaped container in the storage chamber. Therefore, when the container is pulled out and the powder is thrown into the trash box, the powder rises and people or the site. It was polluting the environment. In particular, the dust collector installed on the printing machine is difficult to work because the powder container is at a high position, and the powder disposal tends to be neglected. The dust power had decreased.

Therefore, an object of the present invention is to provide a dust collecting device for a printing machine, which can discard or circulate and reuse the show-through preventing powder while maintaining the beautification hygiene of the worker and the site environment.

[0005]

In order to achieve the above object, a dust collector for a printing machine according to the present invention blows a show-through prevention powder onto a carrier for carrying printed paper and the printed paper. A casing mounted on the upper surface of a casing of a printing machine having a spray to be attached, a fan provided inside the casing, a motor for driving the fan, and a filter for collecting the scattered excess powder. In the dust collecting device including the above, the automatic collecting means for discharging the powder collected by the filter to the outside is provided.

[0006] Further, a casing for carrying the printed paper and a casing mounted on the upper surface of the casing of the printing machine having a spray for spraying show-through prevention powder on the printed paper, and a casing for the casing. In a dust collector equipped with a fan provided inside, a motor that drives the fan, and a filter that collects the scattered excess powder described above,
At the lower part of the dust collecting chamber inside the casing that contains the powder collected by the filter, a screw conveyor driven by a motor is arranged, and one end of the piping member is connected to the dust collecting chamber for communication. The other end is communicatively connected to a waste storage unit for powder disposal, and the powder collected in the dust collection chamber is conveyed to the pipe member by the screw conveyor and also falls freely through the pipe member to the waste storage unit.

Further, the powder freely falls into a waste bag provided in the waste storage unit.

Further, the dust collector for a printing machine according to the present invention is provided on the upper surface of the casing of the printing machine having a carrier for carrying printed paper and a spray for spraying show-through prevention powder on the printed paper. A casing mounted in a mounting manner, a fan provided inside the casing, a motor for driving the fan, a main filter for collecting the scattered excess powder, and a main filter disposed upstream of the main filter. A dust collecting device comprising: a hygroscopic sub-filter which allows the powder having a particle size smaller than a predetermined particle size to pass through, and an automatic circulating means for circulating the powder collected by the main filter to the spray. It is a thing.

Further, a casing for carrying the printed paper and a casing mounted on the upper surface of a casing of a printing machine having a spray for spraying show-through prevention powder on the printed paper, and a casing for the casing. A fan installed inside, a motor that drives the fan, a main filter that collects the excess powder that has scattered, and a powder that is placed upstream of the main filter and that has a particle size smaller than a specified particle size. A hygroscopic sub filter, which is provided with a screw conveyor driven to rotate by a motor at a lower part of a dust collection chamber inside a casing for containing the powder collected by the main filter. Further, one end of the piping member is connected to the dust collecting chamber, and the other end is connected to a powder storage tank that stores powder to be sent to the spray. Binding, and in which the powder collected in the dust collection chamber is fed ring to the spray falls to the powder storage tank through the pipe member while being conveyed to the pipe member by a screw conveyor.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings showing the embodiments.

1 and 2 show an embodiment of a dust collector for a printing machine according to the present invention. This dust collector 20 comprises a casing 1, a fan 35 provided inside the casing 1,
A motor 36 that drives a fan 35, and a filter 28 that collects excess show-through prevention powder 17 that has been scattered (described later).
And an automatic discharging means E for discharging the collected powder 17 to the outside.

The automatic discharge means E will be described in detail. A screw conveyor 42, which is disposed below the dust collecting chamber 30 for containing the powder 17 collected by the filter 28, is driven by a motor 41, and a powder conveyor. A waste storage unit 44 that stores 17 outside the casing 1, a dust collection chamber 30, and a waste storage unit 44.
And a piping member 43 for connecting and communicating with each other.

Therefore, the dust collecting device 20 of the printing machine 2 having the carrier 6 for carrying the printed paper 5 and the spray 18 for spraying the show-through prevention powder 17 on the printed paper 5,
Powder 17 that is mounted on the upper surface of the casing 10 at the rear of the printer body 3 and is sprayed and scattered in the printer body 3
Is collected in the dust collecting chamber 30 and automatically discharged to the outside by the automatic discharging means E, which will be described later in detail.

The printing machine 2 and the printing process will be described below. A pedestal 4 for the printed paper 5 is provided in the lower rear portion of the printing machine body 3, and inside the housing 10 of the printing machine body 3. .. is provided on the receiving table 4. The carrier 6 is composed of a (endless) chain conveyor 7 and grippers 8 attached to the conveyor 7 at equal intervals. The gripper 8 holds the printed paper 5 and carries it. At this time, the gripper 8 hits the grip releasing member 9 provided at the rear position of the receiving table 4 so as to project upward, and the gripper 8 opens so that the printed paper 5 ...
It falls and is piled up.

A printed paper guide plate 11 is provided along the path line L of the carrier 6 on the upstream side of the pedestal 4 in the housing 10. 12 is a powder supply means, a blower 15 that sends air, a storage tank 16 that is connected to the blower 15 and stores the show-through prevention powder 17, and a supply pipe 13 that is connected to the storage tank 16. The spray 18 is connected to the tip of 13 in communication therewith. The powder 17 is a powder of potato starch, corn starch, or the like coated with silicon.

Then, the powder 17 in the storage tank 16 is sent to the spray 18 as shown by an arrow A by the air supplied from the blower 15 and is directed from the spray 18 to the printed paper guide plate 11 (printed paper 5 Towards the surface) Powder 17
Gush out. At this time, a shielding plate 19 is provided on the upstream side of the pedestal 4 in order to prevent the powder 17 from scattering to the pedestal 4 side.

The housing 10 above the shielding plate 19 has a suction port through which the scattered powder 17 is sucked by the dust collector 20.
25 is provided, and the lower surface of the casing 1 of the dust collector 20 is provided with an opening 26 corresponding to the suction port 25.

Further, the powder 17 sucked into the casing 1 has a filter 28 through the suction passage 21 and a communication port 27 in which a damper (for adjusting the ventilation amount) 38 is openably and closably attached. It flows into the dust collection chamber 30. The fan
The upper wall of the motor chamber 24 of the motor 36 connected to the 35 is provided with a plurality of exhaust ports 37 for discharging the air passing through the filter 28 to the outside.

The filter 28 that adheres and collects the powder 17 that has flowed into the dust collecting chamber 30 is, for example, a mesh formed by bending a thick non-woven fabric into a wavy shape and having a mesh size of 3 to 8 μm. In addition, the door 34 for inserting and removing the filter 28
Is provided on the upper wall of the casing 1.

A valley-shaped powder tray 31 is provided on the bottom surface of the casing 1 below the dust collecting chamber 30, and the recess 45 of the tray 31 is (slightly) lifted up (as described above) to automatically discharge means E. The screw conveyor 42 is provided. Also, in order to surely accumulate the powder 17 in the saucer 31,
Protrusions 39 and 40 are provided from both sides of the tray 31 toward the recess 45.

Further, the base end 47 of the screw conveyor 42
Is the shaft 41a of the motor 41 that penetrates the casing 1.
The casing 1 is connected to the casing 1 and has a tip 46 projectingly provided.
It is pivotally attached to the side wall 48a of the powder container 48. The motor 41 is housed in a cover member 49 that surrounds the outside.

Further, a through hole 50 is formed in the lower surface of the powder container 48 (below the tip of the screw conveyor 42), and one end 51 of the piping member 43 is connected to the through hole 50. The piping member 43 is a side wall of the casing 10 of the printer body 3.
The other end 52 is communicatively connected to a (box-shaped) waste accommodating portion 44 that is fixed along 53 and is fixed to the lower portion of the side wall 53.

The powder 17 adhering to the filter 28 is dropped onto the powder tray 31 by vibrating the filter 28 with a swing lever (not shown) connected to the filter 28, and drives the motor 41. It is conveyed to the tip end 46 side by the screw conveyor 42 that rotates.

Then, the powder container 48 of the casing 1
They are collected inside and continuously fall free from the through hole 50 of the accommodating portion 48 to the waste accommodating portion 44 through the piping member 43. At this time, the waste bag 54 provided in the waste storage unit 44 is attached to the piping member.
Since the other end 52 of the 43 is covered, the powder 17 is in this waste bag
Drops into 54.

The powder 17 in the waste bag 54 is mixed with dust 33, paper powder, ink, oil mist, moisture, etc.,
Since it is difficult to reuse the powder 17, when the powder 17 accumulates in the waste bag 54 to some extent (waste bag 54 together), it is discarded and replaced with a new waste bag. At this time, the powder 17 is completely sealed in the waste bag 54 and thrown away (in a trash box or the like), which is easy, and the powder 17 does not scatter and the person or the site environment is not polluted. The waste bag 54 is preferably transparent so that the amount of the powder 17 inside can be seen.

This dust collecting device 20 prevents the powder 17 from being excessively accumulated in the dust collecting chamber 30 due to continuous use for a long time.
Interlocking the fan 35 and the screw conveyor 42,
Alternatively, the screw conveyor 42 can be operated intermittently, or both can be switched.
Further, it is also preferable to interlock the printing machine 2 and the dust collector 20.

FIG. 3 shows another embodiment of the dust collector for a printing machine according to the present invention. This dust collector 20 has a spray 18 for spraying show-through prevention powder 17 on the printed paper 5. A casing 1 mounted on the upper surface of a casing 10 of the printing machine 2 (similar to the above description), a fan 35 provided inside the casing 1, and a motor 36 for driving the fan 35.
A main filter 28a that collects the scattered show-through preventing powder 17 and a hygroscopic sub-filter 29 that is disposed on the upstream side of the main filter 28a and that allows the powder 17 having a smaller particle size to pass through. , In addition, the main filter
An automatic circulation means F for circulating the powder 17 collected in 28a to the spray 18 is provided.

The automatic circulation means F will be described in detail. A dust collecting chamber for containing the powder 17 collected by the main filter 28a.
A screw conveyor 42 which is disposed at the lower part of 30 and is driven to rotate by a motor 36, and a powder storage tank 16 which stores one end 51 in communication with the dust collection chamber 30 and stores the powder 17 for sending to the spray 18. And a piping member 43 that connects the ends 52 to each other. The hygroscopic sub-filter 29 is placed on a tray 32 (described later),
Other configurations of the dust collecting device 20 are similar to those described above.

Hygroscopic sub-filter 29 in casing 1
Is disposed on the saucer 32 provided on the projecting piece 40 (above the powder saucer 31) on the upstream side of the main filter 28a, and is formed, for example, by bending a thick non-woven fabric into a wavy shape. There is. The other end 52 of the piping member 43 is connected to the powder storage tank 16 so as to communicate therewith, and the opening end 56 is directed in the direction of arrow A through which the air sent from the blower 15 flows.

However, the powder 17 ejected from the spray 18 of the powder supply means 12 (as described above) partially adheres to the printed paper 5, and most of it is scattered and sucked into the dust collector 20. . In this scattered powder 17, dust 33,
Paper dust, ink, oil mist, moisture, etc. are mixed, but these (dust 33, paper dust,
Ink, oil mist, moisture, etc. adhere and only the powder 17a smaller than a predetermined particle size (20 μm to 30 μm) passes.

That is, only the clean powder 17a that has been dehumidified and removed of impurities flows into the dust collecting chamber 30 and is collected by the main filter 28a and accumulated on the powder receiving tray 31 below. The powder 17a is dried and maintained by a heater (not shown) provided in the dust collection chamber 30, but the positive pressure exhaust air having the motor exhaust heat of the motor chamber 24 is collected in the dust collection chamber. It is also good to introduce some within 30.

On the other hand, impurities (dust 33, paper powder, etc.) and powder 17 having a predetermined (large) particle size are attached to the sub-filter 29 and collected, and also accumulate on the lower tray 32 and accumulate to some extent ( Remove the saucer 32 from the casing 1)
Discarded.

The powder 17a collected in the powder receiving tray 31 in the dust collecting chamber 30 is transferred to the screw conveyor of the automatic circulating means F.
At 42, it is conveyed to the powder container 48 (see FIG. 2) of the casing 1 on the side of the tip 46, and drops from the through hole 50 on the lower surface of the container 48 through the piping member 43 into the powder storage tank 16. Then, by the air from the blower 15, it is recirculated to the spray 18 together with the powder 17 previously stored in the storage tank 16, and is sprayed again on the printed paper 5. In other words, impurities are removed (purified), and the powder is automatically circulated.
17 are reused. In addition, the cost can be reduced by about 30% by reuse.

The powder storage tank 16 of the piping member 43
If an opening / closing valve 55 (as shown in the figure) is provided on the side, the valve 55 is closed and the storage tank 16 is removed and opened when the amount of circulating powder 17a is adjusted or the powder 17a is discarded. It can be discharged in the state.

Further, the fan 35 and the screw conveyor 42 may be interlocked (as described above), the screw conveyor 42 may be intermittently operated, or both of them may be switched. Further, it is also preferable to interlock the printing machine 2 and the dust collector 20.

Further, the present invention is not limited to the above-mentioned embodiment, and for example, the dust collecting device 20 described in FIG. 1 is also provided with a hygroscopic sub-filter and its tray, and the powder from which impurities are removed is discarded. It may be stored in the storage unit 44, and later mixed with new powder 17 and stored in the storage tank 16 for use.

[0037]

Since the present invention is configured as described above,
The following effects are obtained.

(According to the dust collector for a printing machine according to the first or second aspect), the used show-through prevention powder 17 accumulated in the dust collector 20 is automatically discharged to the outside without touching it. can do. In other words, since the operator does not have to collect the powder 17 in the dust collector 20 (at a high position) on the printing machine 2, the powder 17 can be easily disposed of. In addition, this makes it easier for the worker to frequently discard the powder 17 in the dust collector 20, and the powder 17 is not excessively accumulated in the filter 28 and the powder pan 31 (by extending the clogging life of the filter 28). The dust collection efficiency of the dust collection device 20 is improved.

(According to the dust collector for a printing press according to claim 2 or 3, the used show-through preventing powder 17 in the dust collector 20 is disposed at a position lower than the casing 1 of the dust collector 20. Since the powder is automatically dropped and stored in the waste bag 54 of the storage portion 44, the powder 17 can be easily disposed of. Further, since the waste bag 54 can be sealed and the powder 17 can be easily discarded in the trash can or the like, the powder 17 does not scatter and can be disposed of sanitarily. In other words, it is hygienic as the site environment and the worker are not contaminated by the powder 17 --- the worker does not inhale the impurities such as the powder 17 or dust 33 or ink, or attach them to clothes or body. .

Dehumidification and impurities (dust 33, paper dust, ink and oil mist) in the show-through prevention powder 17 scattered by the hygroscopic sub-filter 29 (according to the dust collector for a printing machine according to claim 4 or 5). Etc.) and the powder 17 can be purified and reused, so that the cost of the powder 17 can be reduced.

Furthermore, the powder 17 that has been purified and accumulated in the dust collecting chamber 30 can be automatically circulated (without being discharged to the outside) and fed back to the spray 18, so that the time and effort to discharge it once to the outside can be saved. At the same time, beautification hygiene to the worker and the site environment can be maintained.

Since the dust collection chamber 30 and the powder storage tank 16 are connected to each other by the pipe member 43 (according to the dust collector for a printing machine according to claim 5), the purified powder 17 is stored in the storage tank. Can be partially stored in 16. Therefore, the number of times of replenishment of the powder 17 into the storage tank 16 (replenishment time) can be reduced. In addition, when the powder 17 in the dust collection chamber 30 is discarded, it is convenient because the storage tank 16 can be removed.

[Brief description of drawings]

FIG. 1 is a simplified cross-sectional view showing a mounted state of an embodiment of a dust collector for a printing press according to the present invention.

FIG. 2 is an explanatory diagram of a configuration of automatic ejection means.

FIG. 3 is a simplified cross-sectional view showing a mounted state of another embodiment.

[Explanation of symbols]

 1 Casing 2 Printing machine 5 Printed paper 6 Conveyor 10 Housing 16 Powder storage tank 17 Show-through prevention powder 18 Spray 28 Filter 28a Main filter 29 Hygroscopic auxiliary filter 30 Dust collection chamber 35 Fan 36 Motor 41 Motor 42 Screw conveyor 43 Piping member 44 Waste storage section 51 One end 52 The other end 54 Waste bag E Automatic discharge means F Automatic circulation means

Claims (5)

[Claims] 1. A carrier 6 for carrying a printed paper 5 and a spray for spraying show-through prevention powder 17 on the printed paper 5.
The casing 1 mounted on the upper surface of the casing 10 of the printing machine 2 having 18 inside, the fan 35 provided inside the casing 1, the motor 36 for driving the fan 35, and the scattered extra A filter 28 that collects the above powder 17,
A dust collector for a printing machine, comprising: an automatic discharge means E for discharging the powder 17 collected by the filter 28 to the outside. 2. A carrier 6 for carrying printed paper 5 and a spray for spraying show-through prevention powder 17 onto the printed paper 5.
The casing 1 mounted on the upper surface of the casing 10 of the printing machine 2 having 18 inside, the fan 35 provided inside the casing 1, the motor 36 for driving the fan 35, and the scattered extra A filter 28 that collects the above powder 17,
In a dust collector equipped with, a screw conveyor rotatably driven by a motor 41 below the dust collecting chamber 30 inside the casing 1 containing the powder 17 collected by the filter 28.
42 is provided, and one end 51 of the piping member 43 is connected to the dust collecting chamber.
The powder collected in the dust collecting chamber 30 is connected to the waste collection unit 44 for powder disposal while the other end 52 is connected to the powder storage unit 30.
A dust collector for a printing machine, characterized in that 17 is conveyed to a pipe member 43 by a screw conveyor 42, and is freely dropped through the pipe member 43 to a waste storage unit 44. 3. The dust collector for a printing machine according to claim 2, wherein the powder 17 falls freely into a waste bag 54 provided in the waste storage unit 44. 4. A carrier 6 for carrying the printed paper 5 and a spray for spraying show-through prevention powder 17 on the printed paper 5.
The casing 1 mounted on the upper surface of the casing 10 of the printing machine 2 having 18 inside, the fan 35 provided inside the casing 1, the motor 36 for driving the fan 35, and the scattered extra The main filter 28a that collects the above powder 17
And a hygroscopic auxiliary filter 29 which is disposed on the upstream side of the main filter 28a and allows the powder 17 having a particle size smaller than a predetermined particle size to pass therethrough. Powder 17 collected, spray 18 above
A dust collecting device for a printing machine, comprising an automatic circulating means F for feeding back to the printer. 5. A carrier 6 for carrying the printed paper 5 and a spray for spraying show-through prevention powder 17 onto the printed paper 5.
The casing 1 mounted on the upper surface of the casing 10 of the printing machine 2 having 18 inside, the fan 35 provided inside the casing 1, the motor 36 for driving the fan 35, and the scattered extra The main filter 28a that collects the above powder 17
And a hygroscopic auxiliary filter 29 which is disposed on the upstream side of the main filter 28a and allows the powder 17 having a particle size smaller than a predetermined particle size to pass therethrough. A screw conveyor 42, which is rotationally driven by a motor 41, is provided below the dust collecting chamber 30 inside the casing 1 that houses the collected powder 17, and one end 51 of the piping member 43 communicates with the dust collecting chamber 30. Along with the connection, the other end 52 is connected to the powder storage tank 16 that stores the powder 17 to be sent to the spray 18, and the powder 17 collected in the dust collection chamber 30 is piped by the screw conveyor 42.
A dust collecting device for a printing machine, which is transported to the powder 43, drops through the pipe member 43 into the powder storage tank 16 and is fed back to the spray 18.