JP4566731B2 - Hot air blowing mechanism in printing paper drying equipment - Google Patents

Description

  The present invention relates to a hot air blowing mechanism in an apparatus for drying printing paper with hot air.

  In the web printing line, the belt-shaped printing paper is printed by passing through a high-speed offset printer, heated in hot air of a drying device, heated, and the printing ink is dried and cooled by passing through a cooling device. The

  As disclosed in Patent Document 1, a drying apparatus using hot air has a drying chamber provided between a printing press and a cooling device. The box-shaped drying chamber has a horizontally long inlet at the front end wall and a horizontally long outlet at the rear end wall, and forms a printing paper path in the front-rear direction from the inlet to the outlet. On the upper side and the lower side of the printing paper path, nozzles that are long in the left-right direction across the printing paper path are provided in parallel in the front-rear direction. The printing paper traveling in the printing paper path is hit by hot air blown from the nozzles on the upper and lower surfaces, respectively, and the printing ink on the upper and lower surfaces is dried.

  As illustrated in FIGS. 2 and 3, the nozzle 11 is a substantially box-shaped box shape that is long in the left-right direction, and the inside of the box-shaped body serves as a hot air passage. The hot air passage that is long in the left-right direction has both left and right ends as the open end of the hot air inlet and the closed end of the dead end. The nozzle 11 on the lower side of the printing paper passage 4 is provided with two elongated jet nozzles 12 connected to the upper surface of the hot air passage along the left-right direction on the upper surface of the box-shaped body. The nozzle 11 on the upper side of the printing paper passage 4 is provided with two elongate spouts 12 connected to the lower surface of the hot air passage along the left-right direction on the lower surface of the box-shaped body.

  The nozzles 11 arranged in parallel on the lower side of the printing paper passage 4 connect the lower common passage 13 to the open ends of the hot air passages. The nozzles 11 arranged in parallel on the upper side of the printing paper passage 4 connect the upper common passage 13 to the open ends of the hot air passages. The upper common passage 13 and the lower common passage 13 are connected to a heated air circulation path for supplying hot air.

  In the conventional hot air passage of the nozzle 11, as illustrated in FIGS. 7 and 8, a punching metal rectifying plate 21 is provided in parallel to the jet port 12 on the upstream side of the jet port 12. A plurality of baffle plates 51 are provided on the upstream side of the rectifying plate 21 at right angles to the rectifying plate 21 along the transverse direction of the hot air passage. Hot air flows into the hot air passage of the nozzle 11 from its opening end, flows while being obstructed by the plurality of baffle plates 51, passes through a number of holes in the rectifying plate 21, blows out from the jet outlet 12, and passes through the printing paper passage 4. Hit the running paper.

JP 2004-330560 A

  When the belt-shaped printing paper runs in the front-rear direction through the printing paper path from the entrance to the exit of the drying chamber, hot air blown from a large number of nozzles that are long in the left-right direction hits the top and bottom surfaces, and receives the force by the hot air hitting. .

  Hot air blown from the nozzle outlet of the nozzle that is long in the left-right direction can be printed during running if the direction of the blowout tilts to the left or right side, or the flow velocity or flow rate of the blowout differs between the left and right sides of the jet outlet. The paper flows to the left or right, meanders, and smooth running is impeded. Drying of printing paper may become uneven in the left-right direction. In addition, the running printing paper may rub against the upper or lower nozzles, and the upper or lower surface may be damaged.

  Such paper flow and paper rubbing are due to the fact that the balance of the force exerted on the running printing paper by the hot air blown from the nozzle outlet is lost. It often occurs at the drying chamber inlet side portion where hot air starts to hit and at the drying chamber outlet side portion where hot air hits.

  Therefore, in order to prevent paper flow and paper rubbing, the nozzle fixes a baffle plate in the internal hot air passage. The baffle plate is adjusted in size and position in order to control the flow of hot air. This adjustment takes a lot of work.

  Also, when a baffle plate is adjusted and fixed for a specific printing paper, if the baffle plate does not have to be readjusted for printing paper whose thickness and other dimensions and physical properties are different from that printing paper, paper flow and paper rubbing will occur. May occur. It takes a lot of trouble to readjust the baffle plate fixed in the hot air passage inside the nozzle.

1) The drying chamber forms a printing paper path in the front-rear direction from the entrance to the outlet, and is provided with a long nozzle in parallel in the left-right direction on the upper side and the lower side of the printing paper path. Is configured so that hot air blown from a large number of nozzles hits the upper and lower surfaces while traveling in the printing paper path,
The nozzle has a hot air passage inside, left and right ends of the hot air passage are open ends and closed ends, and an elongated spout is provided along the left and right direction on the upper or lower surface of the hot air passage facing the printing paper passage. A rectifying plate that penetrates many holes is provided on the upstream side of the jet outlet, and hot air flows into the hot air passage from its opening end, passes through the numerous holes of the rectifying plate, and blows out from the jet outlet . the hot-air blowing mechanism odor in drying device Te,
The hot air passage of the nozzle is provided with a partition plate on the upstream side of the rectifying plate, divided into a main road on the rectifying plate side of the partition plate and a side passage opposite to the rectifying plate side of the partition plate, and flows into the open end of the hot air passage The hot air is divided into two and flows into the main road and the side road. The main road and the closed end of the side road are connected by a communication hole, and the hot air that has flowed into the side road flows through the connection hole and flows into the closed end of the main road. The hot air flowing in from the communication hole and the hot air flowing into the main road from its opening end pass through many holes of the rectifying plate and blow out from the jet outlet,
A valve plate is provided on the opening end side of the main road and the side road, the opening end of the main road is throttled as the valve plate enters the main road, and the opening end of the side road is throttled as the valve plate enters the side road,
Connect the operating rod to the valve plate, project the end of the operating rod out of the hot air passage, make the protruding end of the operating rod the operating section, and operate the operating section, the valve plate will enter the main road or side road and hot air will flow into the main road A hot air blowing mechanism characterized in that the ratio of dividing into side streets is changed.

2) In the hot air blowing mechanism,
The operation portion of the operation rod was arranged to protrude toward the closed end of the hot air passage.

3) In the hot air blowing mechanism described above,
The operation of the valve plate is configured to increase or decrease the protruding amount of the operation portion by pulling out or pushing in the operation portion of the operation rod.

  When the operation part of the operation rod is operated, the ratio of dividing the hot air flowing into the open end of the hot air passage into the main road and the side road of the hot air passage changes, and the hot air flowing into the main road from the open end is connected to the main road on the closed end side. The ratio with the hot air flowing in from the hole changes. Then, the hot air blown out from the nozzle outlet is swung toward the open end or the closed end of the hot air passage. Alternatively, the flow velocity or flow rate of the blowout increases or decreases at the hot air passage opening end side portion or the closed end side portion of the jet outlet, and the difference or ratio of the flow velocity or flow rate at both side portions of the jet outlet changes.

  Therefore, by operating the operating portion of the operating rod, the balance of the force that the hot air blown from the nozzle outlets exerts on the running printing paper can be adjusted, and paper flow and paper rubbing can be prevented. There is no need for much trouble such as adjustment of baffle plates in the hot air passage.

  When the operation part of the operation rod is arranged on the closed end side of the hot air passage, the hot air passage closed end side of the drying chamber is called the man side, and unlike the gear side on the opposite side, it is a place where workers come and go. The operation unit is easy to operate.

  In the printing line, as shown in FIG. 1, a high-speed offset printing press P, a drying device D, a cooling device C, and a folding machine (not shown) are sequentially arranged. In the printing press P, although not shown, a belt-like paper is drawn out from the web, and the belt-like paper is printed through a printing roller. The strip-shaped printing paper a fed out from the printing press P at high speed passes through the drying device D and is heated with hot air, and the printing ink adhering to the paper surface is dried. The printing paper a heated by the drying device D passes through the cooling roller of the cooling device C and is cooled.

  The drying device D includes a drying chamber 1 between the printing press P and the cooling device C. The box-shaped drying chamber 1 is provided with a horizontally-long rectangular inlet 2 on the front end wall and a horizontally-long rectangular outlet 3 on the rear end wall, and a printing paper passage 4 is formed in the front-rear direction from the inlet 2 to the outlet 3. . The strip-shaped printing paper a sequentially passes through the inlet 2, the printing paper passage 4, and the outlet 3 of the drying chamber 1.

  In the elongated rectangular parallelepiped-shaped drying chamber 1, the third position on the inlet 2 side is the heating chamber 5, and the fourth position on the outlet side is the non-heating chamber 6. A partition wall between the heating chamber 5 and the non-heating chamber 6 is provided with a horizontally-long rectangular passage port 7 through which the printing paper passage 4 passes. The inside of the heating chamber 5 is a heating area. The elongated heating zone is divided into three equal parts, and the first heating zone 8, the second heating zone 9 and the third heating zone 10 are sequentially arranged from the inlet 2 side.

  In the first heating area 8, nozzles 11 that are long in the left-right direction are provided in parallel in the front-rear direction on the upper side and the lower side of the printing paper path 4, and a large number of nozzles 11 are staggered across the printing paper path 4. It is arranged in a shape. The nozzles 11 on the upper side and the lower side of the printing paper path 4 blow out heated air toward the printing paper path 4, respectively.

  As shown in FIGS. 2 and 3, the nozzle 11 is a substantially box-shaped box shape that is long in the direction transverse to the printing paper a and in the left-right direction, and the inside of the box shape is a hot air passage. The hot air passage that is long in the left-right direction has both left and right ends as the open end of the hot air inlet and the closed end of the dead end. The nozzle 11 on the lower side of the printing paper passage 4 is provided with two elongated jet nozzles 12 connected to the upper surface of the hot air passage along the left-right direction on the upper surface of the box-shaped body. The nozzle 11 on the upper side of the printing paper passage 4 is provided with two elongate spouts 12 connected to the lower surface of the hot air passage along the left-right direction on the lower surface of the box-shaped body.

  The nozzles 11 arranged in parallel on the lower side of the printing paper passage 4 connect the lower common passage 13 to the open ends of the hot air passages. The nozzles 11 arranged in parallel on the upper side of the printing paper passage 4 connect the upper common passage 13 to the open ends of the hot air passages. The upper common passage 13 and the lower common passage 13 are connected to a heated air circulation path for supplying hot air.

  As shown in FIG. 1, the heating air circulation path sequentially connects the blower 14, the air volume control valve 15 and the heating device 16, opens the suction port of the blower 14 into the first heating area 8, and exits the heating device 16. Are connected to the upper common passage 13 and the lower common passage 13, respectively. In the first heating section 8, the internal air is heated by the heating device 16, and the heated air is sprayed onto the upper and lower surfaces of the printing paper a traveling through the printing paper passage 4 by the multiple nozzles 11.

  Similarly to the first heating zone 8, the second heating zone 9 and the third heating zone 10 are also provided with a large number of nozzles 11, upper and lower common passages 13, and heating air circulation passages 14, 15, and 16, respectively.

  The inside of the non-heating chamber 6 is a non-heating area. The non-heating zone is provided with a large number of nozzles 11 and upper and lower common passages 13 as in the heating zones 8, 9, and 10. However, instead of the heated air circulation paths 14, 15, 16, a non-heated air circulation path for supplying unheated air is provided. The non-heated air circulation path connects the blower 17 and the air volume adjustment valve 18, opens the suction port of the blower 17 into the non-heated area, and connects the discharge port of the blower 17 to the upper side via the air volume adjustment valve 18. The passage 13 is connected to the lower common passage 13. In the non-heated area, the internal air is not heated, and the non-heated air is blown by a large number of nozzles 11 onto the upper and lower surfaces of the printing paper a traveling in the printing paper path 4.

  In the non-heating zone, the printing paper a heated in the heating zones 8, 9, and 10 is cooled with non-heating air, and the solvent vapor of the printing ink accompanying the printing paper a is stripped with non-heating air. The air inside the non-heated area is heated by passing the high-temperature printing paper a that has passed through the heated areas 8, 9, and 10. The non-heated air blown out from the nozzle 11 is not heated by the heating device, but the air inside the non-heated area is heated, so it is hot air, not normal temperature wind. The printing paper a traveling in the printing paper path 4 is hit by hot air of heated air blown from the nozzles 11 in the heating areas 8, 9, and 10 on the upper and lower surfaces, and hot air of unheated air blown from the nozzles 11 in the non-heating area. Hit.

  In the drying apparatus D, the portion where the paper flow or the paper rubbing is likely to occur is the first heating portion outside the inlet 2 side portion, that is, the beginning portion of the first heating zone 8 and the outlet 3 side portion, ie, the end portion of the non-heating zone. These are the end part of the zone 8, the start and end part of the second heating zone 9, the start and end part of the third heating zone 10, and the start part of the non-heating zone.

  The hot air blowing mechanism of the nozzle 11 is different between the beginning and end of each area where paper flow and paper rubbing are likely to occur, and the middle part of each area where paper flow and paper rubbing are less likely to occur.

  As shown in FIGS. 4 to 6, the nozzles 11 at the beginning and end of each zone are provided with a punching metal rectifying plate 21 penetrating a number of holes in the left-right direction on the upstream side of the outlet 12 of the hot air passage. It is provided in parallel with the jet nozzle 12 along. Hot air flows from the common passage 13 into the hot air passage through its open end, passes through a number of holes in the rectifying plate 21, and blows out from the outlet 12.

  The box-shaped body of the nozzle 11 is provided with a partition plate 22 on the upstream side of the rectifying plate 21 in parallel with the rectifying plate 21 along the left-right direction, the main road 23 on the rectifying plate 21 side of the partition plate 22, and the rectifying plate of the partition plate 22. A hot air passage is vertically divided into a side passage 24 on the opposite side to the 21 side. The hot air flowing from the common passage 13 into the opening end of the hot air passage is divided into two and flows into the opening end of the main road 23 and the opening end of the side passage 24.

  The partition plate 22 is provided with a communication hole 25 on the closed end side of the hot air passage, and the closed end side of the main road 23 and the side road 24 is communicated with the communication hole 25. The hot air that has flowed into the side road 24 flows into the closed end side of the main road 23 through the communication hole 25. Hot air that flows into the main road 23 from the communication hole 25 on the closed end side and hot air that flows into the main road 24 from its opening end collide within the main road 24, pass through a number of holes in the rectifying plate 21, and exit the jet 12. Blow out from.

  In addition, the partition plate 22 is attached to the end of the hot air passage on the opening end side so as to be rotatable on the main road 23 side and the side road 24 side, and the valve plate 31 for flow rate control on the opening end side of the main road 23 and the side road 24. Is provided. As the valve plate 31 rotates from the neutral position located on the same plane as the partition plate 22 toward the main road 23 and enters the main road 23, the opening end of the main road 23 is narrowed. Conversely, as the side road 24 rotates and enters the side path 24, the open end of the side path 24 is narrowed.

  The valve plate 31 has a connecting piece 32 fixed to the plate surface on the main road 23 side. The connecting piece 32 rotatably connects the tip of the operation rod 33 to the tip. The operation rod 33 is disposed in parallel with the partition plate 22 along the left-right direction, and has a base end protruding outside the closed end of the hot air passage, and a protruding end serving as an operation portion 34.

  When the operating portion 34 of the operating rod 33 is pulled out by hand and the amount of protrusion is increased, the bendable operating rod 33 and the connecting piece 32 move, and the valve plate 31 rotates toward the main road 23 and enters the main road 23. In addition, the flow rate of hot air flowing into the main road 23 decreases, and the flow rate of hot air flowing into the side road 24 increases. On the other hand, if the amount of protrusion is reduced by pushing in by hand, the valve plate 31 rotates toward the side road 24 and enters the side road 24, and the flow rate of hot air flowing into the side road 24 decreases and flows into the main road 23. Increases the flow rate of hot air. When the operating portion 34 is operated by increasing or decreasing the amount of protrusion of the operating portion 34, the valve plate 31 enters the main road 23 or the side road 24, and the ratio of dividing the hot air flowing into the hot air passage into the main road 13 and the side road 24 changes. The mechanisms 32 and 33 that operate the valve plate 31 by increasing or decreasing the protruding amount of the operation unit 34 have a simple structure.

  As shown in FIG. 4, the operation portion 34 that protrudes outside the closed end of the hot air passage passes through an attachment piece 35 that is fixed to the end face of the box-shaped body of the nozzle 11 and is fixed by a bolt 36 that is screwed into the attachment piece 35. is doing. These operation parts 34 to 36 are arranged on the hot air passage closed end side of the drying chamber 1 and on the man side where the operator goes back and forth. Easy operation by the operator. The opposite gear side, the hot air passage opening end side of the drying chamber 1, is the upper and lower common passage 13, the blower 14 of each heating air circulation path, the air volume adjusting valve 15, the heating device 16, and the non-heating air circulation. A road blower 17 and an air volume adjusting valve 18 are arranged.

  The nozzle 11 at the middle part of each area where paper flow and paper rubbing are unlikely to occur is similar to the nozzle 11 at the beginning and end of each area where paper flow and paper rubbing is likely to occur. However, the bypass mechanisms 21 to 25 for the hot air passage and the valve mechanisms 31 to 36 for controlling the flow rate are not provided.

  When operating the drying device D, the blower 14 and the heating device 16 of each heated air circulation path are operated, and the blower 17 of the non-heated air circulation path is operated. When the printing line is activated, the printing paper a passing through the drying device D travels through the printing paper passage 4 of the drying chamber 1, enters the heating area 8, 9, 10 of the heating chamber 5, the passage port 7, and is not heated. Pass through the non-heated area of the chamber 6 and the outlet 3 sequentially. The printing paper a is blown with hot air of heated air from a large number of nozzles 11 on the upper surface and the lower surface in the heating areas 8, 9, 10 of the heating chamber 5. Next, in the non-heated area of the non-heating chamber 6, hot air of non-heated air is blown from a large number of nozzles 11 on the upper surface and the lower surface.

  When the paper flow or the paper rubbing of the printing paper a occurs, for example, at the inlet 2 side portion, or at the beginning of the first heating area 8, the bolt 36 is loosened at the nozzle 11 of that portion to make the operating rod 33 movable. The protrusion amount of the operation unit 34 is increased or decreased. When the operation unit 34 is operated in this way, the valve plate 31 rotates in the nozzle 11, and the ratio of the hot air flowing into the open end of the hot air passage is divided into the main road 13 and the side road 24. The ratio of the hot air flowing in and the hot air flowing into the main road 24 from the connecting hole 25 on the closed end side thereof changes.

  Then, as for the hot air which blows off from the jet nozzle 12, the direction of blowing blows to the open end side or closed end side of a hot air path. Alternatively, the flow rate or flow rate of the blowout increases or decreases at the hot air passage opening end side portion or the closed end side portion of the jet port 12, and the difference or ratio of the flow rate or flow rate at both side portions of the jet port 12 changes. The balance of the force applied to the running printing paper a by the hot air blown from the jet nozzle 12 is adjusted, and paper flow or paper rubbing does not occur. When the paper flow or paper rubbing stops, the bolt 36 is tightened to fix the operation rod 33, the position of the valve plate 31 is maintained, and the direction in which the hot air blows out from the jet nozzle 12, the flow velocity or the flow rate is maintained.

[Modification]
1) In the above embodiment, the drying chamber 1 of the drying apparatus D is provided with the non-heating chamber 6 outside the heating chamber 5, but the non-heating chamber 6 is not provided and only the heating chamber 5 is provided.
2) In the above embodiment, the heating chamber 5 of the drying chamber 1 divides the heating zone into three zones, but divides it into two zones or four or more zones. Alternatively, the heating area is not divided and is one area.
3) In the above embodiment, the operation of the flow rate control valve plate 31 increases or decreases the protruding amount of the operation unit 34 by pulling out or pushing the operation unit 34 of the operation rod 33. The amount of rotation of the operation unit is increased or decreased by rotating in the other direction or in the other direction.

1 is a schematic longitudinal side view of a printing paper drying apparatus according to an embodiment of the present invention. The partial expanded side view of the lower nozzle row of the 1st heating area of the drying apparatus. The partial enlarged plan view of the same lower nozzle row. FIG. 3 is an enlarged sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. CC sectional view taken on the line of FIG. Sectional drawing of the same position as FIG. 4 which shows the conventional nozzle. The DD sectional view taken on the line of FIG.

Explanation of symbols

P High-speed offset printer, Printing machine D Drying device C Cooling device a Strip-shaped printing paper, printing paper 1 Drying chamber 2 Drying chamber inlet, heating chamber inlet 3 Drying chamber outlet, non-heating chamber outlet 4 Drying chamber Printing paper passage 5 Heating chamber, heating zone 6 Non-heating chamber, non-heating zone 7 Passage port, outlet of heating chamber, inlet of non-heating chamber 8 First heating zone 9 in heating chamber Second heating zone 10 in heating chamber Heating chamber No. 3 heating zone 11 Nozzle, nozzle that blows hot air of heated air, nozzle 12 that blows hot air of non-heated air Nozzle outlet 13 Lower common passage, upper common passage, common passage 14 Blower of heated air circulation passage DESCRIPTION OF SYMBOLS 15 Heating air circulation path air volume adjustment valve 16 Heating air circulation path heating device 17 Non-heating air circulation path air blower 18 Non-heating air circulation path air volume adjustment valves 21-25 Hot air passage bypass mechanism 21 Nozzle rectifying plate, punching Me 22 Nozzle partition plate 23 Nozzle hot air passage main road 24 Nozzle hot air passage side road 25 Main road-side road communication holes 31-36 Flow control valve mechanism 31 Flow control valve plates 32, 33 Operation of valve plate Mechanism 32 Valve plate coupling piece 33 Valve plate operation rods 34 to 36 Valve plate operation portion 34 Operation rod operation portion 35 Mounting piece 36 Bolt 51 Baffle plate

Claims (3)

The drying chamber forms a printing paper path in the front-rear direction from the inlet to the outlet, and is provided with nozzles that are long in the left-right direction in parallel in the front-rear direction on the upper side and the lower side of the printing paper path. A configuration in which hot air blown from a large number of nozzles hits the upper and lower surfaces while traveling in the paper path,
The nozzle has a hot air passage inside, left and right ends of the hot air passage are open ends and closed ends, and an elongated spout is provided along the left and right direction on the upper or lower surface of the hot air passage facing the printing paper passage. A rectifying plate that penetrates many holes is provided on the upstream side of the jet outlet, and hot air flows into the hot air passage from its opening end, passes through the numerous holes of the rectifying plate, and blows out from the jet outlet . the hot-air blowing mechanism odor in drying device Te,
The hot air passage of the nozzle is provided with a partition plate on the upstream side of the rectifying plate, divided into a main road on the rectifying plate side of the partition plate and a side passage opposite to the rectifying plate side of the partition plate, and flows into the open end of the hot air passage The hot air is divided into two and flows into the main road and the side road. The main road and the closed end of the side road are connected by a communication hole, and the hot air that has flowed into the side road flows through the connection hole and flows into the closed end of the main road. The hot air flowing in from the communication hole and the hot air flowing into the main road from its opening end pass through many holes of the rectifying plate and blow out from the jet outlet,
A valve plate is provided on the opening end side of the main road and the side road, the opening end of the main road is throttled as the valve plate enters the main road, and the opening end of the side road is throttled as the valve plate enters the side road,
Connect the operating rod to the valve plate, project the end of the operating rod out of the hot air passage, make the protruding end of the operating rod the operating section, and operate the operating section, the valve plate will enter the main road or side road and hot air will flow into the main road A hot air blowing mechanism characterized in that the ratio of dividing into side streets is changed.   The hot air blowing mechanism according to claim 1, wherein the operating portion of the operating rod is arranged to protrude toward the closed end of the hot air passage.   3. The hot air blowing mechanism according to claim 1, wherein the valve plate is configured to increase or decrease a protruding amount of the operation portion by pulling out or pushing the operation portion of the operation rod.

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