JPH0745249B2 - Plate cleaning equipment for letterpress rotary press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a plate cleaning apparatus for a letterpress rotary printing press.

(Prior Art) When a letterpress rotary printing machine is operated for a long time, paper dust or ink residue adheres to the plate surface to cause clogging, which causes printing inconvenience.

Therefore, conventionally, as in Japanese Utility Model Laid-Open No. 59-43141, a solvent is sprayed onto the plate surface, and then a rotating brush roller is pressed to clean the plate.

(Problems to be solved by the invention) However, in the above cleaning, in order to prevent the printing paper from being wet and broken by the solvent attached to the plate surface, or the ink supplied to the plate surface being melted, It was performed with the impression cylinder and the ink roller separated from the plate cylinder. Therefore, the temporary printing must be interrupted and the cleaning must be performed, and the printing efficiency was very poor.

Further, in the above cleaning, since a rotating brush roll is pressed against the plate surface to scrape off paper dust, ink residue, etc., there is a problem that the plate surface is damaged.

(Object of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to provide a plate cleaning apparatus for a letterpress rotary printing machine that does not interrupt printing and does not damage the plate surface. To do.

(Means for Solving Problems) That is, the present invention relates to a high-pressure air jetting means for blowing high-pressure air onto a plate surface, and paper dust and ink residue scattered by the high-pressure air blown from the high-pressure air jetting means. The gist is a plate cleaning device of a letterpress rotary printing press, which comprises a suction removing means for sucking the above and the like, and a moving means for moving the high pressure air jetting means and the suction removing means together in the axial direction of the plate cylinder.

(Operation) As described above, the present invention blows high-pressure air onto the plate surface by the high-pressure air jetting means to blow away the paper dust, ink residue, etc. adhering to the plate surface, and suck and remove the blown paper dust, ink residue, etc. In addition, the high pressure air jetting means and the suction removing means are moved together by the moving means in the axial direction of the plate cylinder to wash the entire plate.

Embodiments of the Invention Next, the present invention will be described based on illustrated embodiments.

FIG. 1 is a perspective view of a plate cleaning apparatus 1 showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a partially cut side view of a high pressure air injection nozzle 7 and a vacuum duct 8.

Below the plate cylinder 2 of the letterpress rotary printing machine, three ink rollers 4 are provided so as to be in contact with the plate surface 3, and an impression cylinder 5 is provided on the other part of the plate surface 3 via a printing paper 6. ing. Then, the plate cylinder 2 rotates in the direction of arrow B in FIG.
Ink is supplied from the ink roller 4 of the book to the plate surface 3, and then the ink is transferred to the printing paper 6 by the printing pressure of the plate cylinder 2 and the impression cylinder 5 to perform printing.

In the plate cleaning apparatus 1 of this embodiment, the high-pressure air injection nozzle 7 that is a high-pressure air injection unit, the vacuum duct 8 that is a suction removal unit, and the high-pressure air injection nozzle 7 and the vacuum duct 8 are arranged in the axial direction of the plate cylinder 2. A high pressure air generator (not shown) is connected to the high pressure air injection nozzle 7, and the vacuum duct 8 is sucked through a filter (not shown). A device (not shown) is connected.

The filter may have a detachable structure so that it can be easily removed and washed when it becomes clogged.

Further, at both ends of the moving means 30, there are provided attachment / detachment means 31 for bringing the plate cleaning apparatus 1 close to the plate cylinder 2 for cleaning and vice versa. However, in FIG. 1, the attaching / detaching means 31 on the right side is omitted in order to make the configuration of the device easy to understand.

As shown in FIG. 3, the vacuum duct 8 is provided on the downstream side with respect to the rotation direction of the plate cylinder 2 (the direction of arrow B), and the angle between 0 ° and 90 ° with respect to the plate surface tangential direction. It is installed so that. In this way, by facing the high-pressure air jet direction and sucking at an angle,
It has the effect of facilitating the suction of scattered paper dust, ink residue, and the like. Above all, when the angle is about 30 °, the direction of scattering of paper dust ink residue is the most constant, and it is easy to suck. The portions of the left and right side plates 9 of the vacuum duct 8 which are close to the plate cylinder 2 have an arc shape according to the shape of the plate cylinder 2.
Ink residue scattered by jetting high-pressure air,
Alternatively, the gap between the plate cylinder 2 and the plate cylinder 2 is minimized so that paper dust or the like does not fly out of the vacuum duct 8.

Further, as shown in FIG. 3, the vacuum duct 8 has a bent portion.
50 is formed, and the bending angle of the bent portion 50 is preferably 10 ° to 180 °.

Since the bent portion 50 is formed in the vacuum duct 8 as described above, heavy dust, sticky matters such as ink residue are collected by the collecting portion 51 on the bottom wall of the bent portion 50. .

Therefore, if the bent portion 50 is formed in the vacuum duct 8 as described above, it is not necessary to perform frequent cleaning as in the case of using only the filter.

Further, the vacuum duct 8 is configured so as to be removable so that if the vacuum duct 8 becomes dirty with ink residue or the like, it can be removed and cleaned.
If it becomes dirty as a disposable item, a new vacuum duct 8
May be exchanged. Further, the collecting portion 51 of the bent portion may be a detachable cassette type, so that the collected paper dust can be easily removed.

Of course, the vacuum duct 8 may not be provided with the bent portion 50, and only the filter may be used to capture the ink residue or the paper dust.

The high-pressure air jet nozzle 7 is provided on the upstream side with respect to the rotation direction of the plate cylinder 2 so that the jetted air hits the plate surface 3 at an angle of 90 ° to 170 ° with respect to the plate surface tangential direction. It is attached to the upper part of 8.
The jetting angle of high-pressure air is strongest when it is 90 °, but when it is 100 ° to 110 °, it is convenient because paper powder, ink residue, etc. scatter in a certain direction and can be easily sucked. Is.

Next, the moving means 30 will be described. First, the guide plate 34, on which the projecting portions 32 and 33 having a triangular cross section are formed, is arranged parallel to the axial direction of the plate cylinder 2 in the vacuum duct 8.
It is provided on the back of the. At the left end of the guide plate 34, a rotary shaft of a rotatable roller 35 is planted.
On the other hand, a drive motor 36 is disposed near the right end of the guide plate 34, and the rotation shaft of the drive motor 36 is
The drive roller 37 is fitted, and a timing belt 38 is stretched between the drive roller 37 and the rotatable roller 35. Further, the rotation shaft of the tension roller 41 for adjusting the tension by taking the slack of the timing belt 38 is planted in the middle of the guide plate 34.

In addition, a guide plate is provided on the back surface of the vacuum duct 8.
Rotational shafts of four guide rollers 39 in which grooves that engage with the upper and lower protrusions 32 and 33 of the guide plate 34 are implanted, and the grooves of the four guide rollers 39 are inserted into the upper and lower protrusions of the guide plate 34.
The vacuum duct 8 is configured to be movable in the axial direction of the plate cylinder 2 along the guide plate 34 by engaging with 32 and 33.

Further, a fixed plate 40 extending to above the timing belt 38 is provided on the back surface of the vacuum duct 8, and one end of the fixed plate 40 is fixed to the timing belt 38.

The moving means 30 is configured as described above, and the drive roller 37 is rotated by rotating the drive motor 36,
The timing belt 38 moves, and the vacuum duct 8 and the high-pressure air jet nozzle 7 fixed to the timing belt 38 move together in the axial direction of the plate cylinder 2 accordingly.

Instead of the timing belt 38, a flat belt, a chain, a wire or the like can be used.

Next, the attaching / detaching means 31 for attaching / detaching the plate cleaning apparatus 1 to / from the plate cylinder 2 will be described.

First, two support plates 44 and 45 (however, the support plate 45 on the right side is omitted in FIG. 1) supporting the rotary shafts of the plate cylinder 2, the impression cylinder 5, the ink roller 4, etc., are respectively provided. The two support members 46 are fixed so that the surfaces facing each other are parallel to each other, and the guide bars 47 are vertically provided between the two support members 46, respectively. A sliding member 43 is slidably provided on the guide bar 47.

An air cylinder 48 is attached to the central portion of a support member 46 located far from the plate cylinder 2, and the tip of a reciprocating shaft 49 of the air cylinder 48 is fixed to the sliding member 43.

As shown in FIG. 2, both ends of the guide plate 34 are fixed to the sliding member 43 via L-shaped brackets 42.

As described above, the attaching / detaching means 31 is configured to operate the air cylinder 48 to extend the reciprocating shaft 49 and set the plate cleaning device 1 at a position where the plate cylinder 2 can be cleaned (first
(State of figure and figure 2), after cleaning, air cylinder
48 is operated to move the reciprocating shaft 49 in the direction of arrow C in FIG. 1 and FIG.
The plate cleaning device 1 is pulled away from the plate cylinder 2 in this direction.

Next, the operation of the plate cleaning apparatus 1 of this embodiment will be described.

The plate cylinder 2, the impression cylinder 5 and the ink roller 4 rotate to rotate the printing paper 6
While the printing is performed on the drive motor 36, the drive motor 36 is rotated to slide the vacuum duct 8 having the high-pressure air jet nozzle 7 attached thereto along the axial direction of the plate cylinder 2, Air that has been compressed by the high-pressure air generator to become high pressure is jetted onto the plate surface 3
At the same time that paper dust, ink residue, etc. are scattered, the suction device connected to the vacuum duct 8 is operated,
Scattered paper dust, ink residue, etc. are sucked from the vacuum duct 8 to clean the plate surface 3. Of course, washing may be performed by operating the plate cleaning device in a state where the impression cylinder 5 and the ink roller 4 are separated from the plate cylinder 2 and only the plate cylinder 2 is idle.

The vacuum duct 8 and the high-pressure air jet nozzle 7 may be slid over the entire width of the plate cylinder 2 so that the plate cylinder 2 as a whole can be washed at all times, or the printed matter can be seen to find a place to be washed. After moving the vacuum duct 8 and the high-pressure air jet nozzle 7 to that position, the high-pressure air generator and the suction device may be operated to wash only the dirty portion of the plate surface 3.

Next, another embodiment of the moving means will be described.

4 to 6 show another embodiment of the moving means. FIGS. 4 and 5 are perspective views and FIG. 6 is a schematic view.

First, in FIG. 4, instead of the guide plate 34 and the guide roller 39 provided on the back surface of the vacuum duct 8, two guide bars 52 are provided, and two sliding members 43 are arranged in parallel with the axial direction of the plate cylinder 2.
The guide bar 52 is inserted into the vacuum duct 8 via a linear bearing 53 and the like.

Further, FIG. 5 shows that one guide bar 52 is fixedly installed on two sliding members 43 in parallel with the axial direction of the plate cylinder 2, and
The male feed screw 54 is rotatably supported by the two sliding members 43 in parallel with the driving motor at one end of the male feed screw 54.
36 is connected, the guide bar 52 is inserted into the vacuum duct 8 via the linear bearing 53, and a female screw is formed in the vacuum duct 8 to screw the male screw 54 for feeding. The vacuum duct 8 moves left and right by rotating the.

Next, as shown in FIG. 6, the drive motor 36 is attached to the vacuum duct 8.
A pinion 55 that rotates is provided, and both ends of the rack 56 are fixedly installed on the two sliding members 43 so as to engage with the pinion 55. By rotating the drive motor 36, the pinion 55 rotates. Then, along with it, the pinion 55 moves left and right along the rack 56.

Although the number of the high-pressure air injection nozzles 7 attached to the vacuum duct 8 is one in the embodiment shown in FIGS. 1 to 3, the present invention is not limited to this and a plurality of high-pressure air injection nozzles may be provided.

Further, in the above embodiments, the nozzle was shown as the high-pressure air injection means, but the high-pressure air injection means is not limited to it, and if high-pressure air can be injected,
It may be of any type, for example, a slit.

Next, FIG. 7 is a side view showing another embodiment of the attachment / detachment means, in which one end of two links 57, 58 is rotatably connected to the guide plate 34, and the other ends of the links 57, 58 are connected. The ends are rotatably connected to separate bars 59 and 60, respectively. Both ends of the bars 59 and 60 are fixed to the support plates 44 and 45 (45 is not shown) of the printing machine. When the plate surface 3 is washed, it is at the position shown by the solid line in FIG. When finished, the bars 59 and 60 are repelled around the rotation center as shown by the arrow E and moved away from the plate cylinder 2 as shown by the broken line.

(Effects of the Invention) As described above, the plate cleaning apparatus of the present invention comprises the high-pressure air jetting unit, the suction removing unit, and the moving unit that moves the high-pressure air jetting unit and the suction removing unit together in the plate cylinder axial direction. Since the plate surface is cleaned with high pressure air without using a solvent as in the conventional case, the plate surface can be simultaneously cleaned while printing.

Therefore, the conventional plate washing time can be used for printing, and the printing efficiency is improved.

Further, in the present invention, since the non-contact type cleaning with high pressure air is performed without rubbing the plate surface with a brush roller as in the conventional case, the plate surface is not scratched.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of a plate cleaning apparatus 1 showing an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a vacuum duct and high-pressure air jet. Partially cut side views of the nozzle, FIGS. 4 to 6 show other embodiments of the moving means, and FIGS. 4 and 5 are perspective views,
FIG. 6 is a schematic view, and FIG. 7 is a side view showing another embodiment of the attaching / detaching means. 1 ... plate cleaning device 2 ... plate cylinder 3 ... plate surface 4 ... ink roller 5 ... impression cylinder 6 ... printing paper 7 ... high pressure air jet nozzle 8 ... vacuum duct 30 ... moving means 31 ... Attaching / detaching means 34 …… Guide plate 36 …… Drive motor 38 …… Timing belt 39 …… Guide roller 43 …… Sliding member 48 …… Air cylinder 50 …… Bending section

Claims (7)

[Claims] 1. A high-pressure air jetting means for blowing high-pressure air onto the plate surface, a suction removing means for sucking paper dust, ink residue, etc. scattered by the high-pressure air blown from the high-pressure air jetting means, and the high-pressure air. A plate cleaning apparatus for a letterpress rotary printing press, comprising: a moving unit that moves the jetting unit and the suction removing unit together in the axial direction of the plate cylinder. 2. The letterpress rotary printing machine according to claim 1, wherein the high-pressure air jetting means comprises a high-pressure air jetting nozzle or a high-pressure air jetting slit, and the suction removing means comprises a vacuum duct. Plate cleaning device. 3. The high-pressure air jet nozzle or the high-pressure air jet slit is upstream of the plate cylinder rotation direction and the jetted air is jetted onto the plate surface at an angle of 90 ° to 170 ° with respect to the plate surface tangential direction. And the vacuum duct is provided on the downstream side with respect to the rotation direction of the plate cylinder and at an angle of 0 ° to 90 ° with respect to the tangential direction of the plate surface. A plate cleaning apparatus for a letterpress rotary printing machine according to item 2 above. 4. The letterpress according to claim 2 or 3, wherein the vacuum duct is provided with a detachable filter for collecting sucked paper dust, ink residue and the like. Plate cleaning device for rotary printing press. 5. The vacuum duct has a bent portion, and the bottom wall of the bent portion has a collecting portion for collecting the paper dust, ink residue, etc. removed by suction. Two
A plate cleaning apparatus for a letterpress rotary printing machine according to any one of items 1 to 4. 6. The collecting unit of the vacuum duct is a detachable cassette.
A plate washing apparatus for a letterpress rotary printing machine according to the item. 7. The bending angle of the bent portion is 10 ° to 18
The plate washing apparatus for a letterpress rotary printing machine according to claim 5, wherein the angle is 0 °.