JP3579554B2 - Edge cleaner for continuous paper such as web paper - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an edge cleaner for removing dust such as paper dust from both edges of a continuous body such as a web.
[0002]
[Prior art]
2. Description of the Related Art In order to increase productivity, offset presses are being converted to rotary presses using web paper. However, paper dust and the like adhere to the surface of the web, so when printing, dust such as the paper dust adheres to the blanket cylinder and the like, hinders the adhesion of the ink to the paper surface. A so-called white spot or the like may occur on a printed material. The occurrence of white spots or the like lowers the print quality. To prevent this, work has conventionally been performed to remove paper dust and the like from the paper surface before printing.
[0003]
The removal of the paper dust or the like is performed, for example, by applying a brush, air, cloth, or the like to the surface of the traveling paper roll to peel off the paper dust, and sucking it with a suction device or wiping it with a cloth. .
[0004]
[Problems to be solved by the invention]
In the conventional paper dust removal, the surface of the web to be printed is mainly targeted, but paper dust generated in other places is also regarded as a problem.
[0005]
The roll paper is made by cutting the parent roll paper wound by a paper machine into a required width while rewinding the roll paper with a rewinder, or cutting both ears. In the case of coated paper such as art paper and coated paper, a coating agent is coated after paper making, then cut off, and both ears are cut. As shown in FIG. 7, dusts 3 such as paper dust and fibers are adhered to the edges 2 on both sides of the continuous body 1 such as the rolled paper, that is, the cut ends on both sides of the continuous body 1. As shown in FIG. 8, the debris 3 adheres and accumulates in a headband shape on the blanket cylinder 4 during printing. Unless the dust 3 such as paper dust accumulated on the surface of the blanket is frequently washed and removed, the surface of the blanket may be dented.
[0006]
Also, in a book gravure rotary press, the paper is slit into a ribbon by the folding machine. At that time, paper dust is generated on both side edges of the paper, and if left unattended, the paper dust adheres to the printed surface and prints. It may adversely affect quality and pollute the environment. In a gravure rotary press for film printing, slit scum may be generated on the edge of a printed matter, and the slit scum may be discharged while adhering to a product, thereby deteriorating print quality. In a business form printing machine, there is a possibility that the scrap from the marginal punch hole is sent out as a product while adhering to the paper, and the product value may be reduced.
[0007]
Accordingly, an object of the present invention is to provide means for removing dust such as paper dust from the edge of a continuous body such as a roll of paper.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that the suction pipes 5 project from the outside of the edge 2 to the upstream side of the continuum 1 on the front and back surfaces of the continuum 1 such as a running paper roll. 3. The slit-shaped suction port 6 of each suction pipe 5 is an edge cleaner of a continuous body such as a roll of paper contacting the front and back surfaces of the continuous body 1, respectively. 2. The continuous paper web or the like according to claim 1, wherein the downstream edge 6a of the suction port 6 is projected outside the upstream edge 6b, and the edge 2 of the continuous body 1 is scraped by the downstream edge 6a. The invention according to claim 3 is a body edge cleaner, wherein the suction pipe 5 on the front side and the suction pipe 5 on the back side of the continuum 1 are connected in a fork shape and integrally held so as to be capable of normal and reverse rotation. Item 2. An edge cleaner for a continuous body such as a roll of paper according to item 2. It is.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An edge cleaner for a continuous body such as a roll of paper has a structure as shown in FIGS. 1 and 2, and the suction pipe 5 is placed on the front and back surfaces of the continuous body 1 such as a running roll of paper from outside the edge 2. Project from the continuum 1 so as to be inclined toward the upstream side. The slit-shaped suction ports 6 of the suction pipes 5 are in contact with the front and back surfaces of the continuous body 1 respectively.
[0010]
Since one suction tube 5 is disposed on each of the front and back surfaces of the continuous body 1 on both the left and right sides, it is possible to deal with all of the debris 3 attached as shown in FIG. In the examples of FIGS. 1 and 2, four suction pipes 5 are provided, one for each edge 2, but a plurality of suction pipes 5 may be provided for each edge 2 along the flow direction.
[0011]
Further, the suction pipes 5 can be arranged in parallel to the width direction of the continuum 1, but in this embodiment, all the suction pipes 5 protrude so as to be inclined to the upstream side of the continuity 1. . Therefore, the debris 3 coming into contact with the suction pipe 5 is directed to go outside the upper edge 2 of the continuum, and is more reliably removed from the continuum 1. The angle θ at which the suction tube 5 is inclined from the width direction of the continuum 1 to the upstream side varies depending on the material of the continuum, but is approximately 20 degrees. The suction pipes 5 on both sides of the continuum 1 are shifted back and forth in the traveling direction so that the continuum 1 travels in a nip state. The displacement a is about 5 cm.
[0012]
Each suction pipe 5 is a pipe having a substantially circular cross section with a closed end. To make the continuum 1 run smoothly, it is desirable that the cross section be circular, but it may be elliptical as shown in FIG. The suction tube 5 needs to be long enough to cope with the movement of the continuum 1 in the left-right width direction. The length of the suction tube 5 is, for example, about 50 mm to 70 mm.
[0013]
The slit-shaped suction port 6 may be simply formed as a slit in the cylindrical wall of the suction pipe 5, but as shown in FIG. 2 or FIG. The edge 6a may be made to protrude outside the upstream side edge 6b, and the front and back surfaces of the continuous body 1 may be scraped off at the downstream side edge 6a. Since the periphery of the slit-shaped suction port 6 is in contact with the continuum 1, the surface of the suction tube 5 is plated with hard metal, for example, hard chrome to provide abrasion resistance.
[0014]
In addition, in order to simplify the operation of moving the suction tube 5 toward and away from the continuous body 1, as shown in FIGS. And are integrally held so as to be capable of normal and reverse rotation.
[0015]
That is, the suction pipe 5 on the front side and the suction pipe 5 on the back side are connected to the manifold 7 in pairs on both left and right sides of the continuum 1, and the manifold 7 is a rotating shaft parallel to the left and right direction of the continuum 1. 8 and supported by a support frame 9. Each suction pipe 5 is connected to the manifold 7 via an uneven portion (not shown) so that the suction pipe 5 can be easily positioned with respect to the manifold 7 at the time of inspection or replacement.
[0016]
The support frame 9 is fixed on a beam 10 passed between left and right frames (not shown) of the printing press with a set screw 11, and the position can be freely changed on the beam 10 by loosening the set screw 11. is there. A rotation shaft 8 for holding the manifold 7 penetrates the support frame 9 in the left-right direction so as to be rotatable. The support frame 9 is interposed between the rotation shaft 8 and the lock body 13 via a fulcrum pin 12 on the opposite side to the manifold 7. Is rotatably mounted. A ring 14 and a gear 15 are interposed between the lock body 13 and the support frame 9. An operation lever 16 is attached to the lock body 13, and when the lock body 13 is turned to the solid line position in FIG. It is designed to be self-supported at the position by sandwiching it. Further, when the operation lever 16 is operated to the position indicated by the broken line, the lock body 13 is slightly separated from the ring 14, so that a portion from the lock body 13 to the manifold 7 can be turned around the rotation shaft 8. Therefore, when the operation lever 16 is turned around the rotation shaft 8, the manifold 7 rotates a predetermined angle around the rotation shaft 8 with the suction pipe 5. The operation lever 16 is normally provided only on the operation side of the left and right frames of the printing press, but may be provided on both sides as necessary.
[0017]
Further, a mechanism similar to that shown in FIG. 4 is provided on the suction pipe 5 on the opposite side of the continuum 1. A shaft 17 is provided between the left and right rotation shafts 8 so that the opposite mechanism is simultaneously operated by operating the operation lever 16. The shaft 17 rotatably penetrates the support frame 9 to the left and right, and is rotatably supported by the left and right printing machine frames. Other gears 18 meshing with the gear 15 are mounted on the left and right sides of the shaft 17 via splines. For this reason, when the operation lever 16 is rotated around the rotation shaft 8 as described above, the rotation force is also transmitted to the other rotation shaft 8 via the gears 15 and 18 and the shaft 17, and the manifolds 7 on both sides are moved. It will rotate at the same time. In order to accurately position the suction tube 5 with respect to the continuum 1, the stop position of the suction tube 5 by rotating the operation lever 16 is, for example, a scale (not shown) between the lock body 13 and the ring 14. Is indicated by.
[0018]
The rotating shaft 8 is a hollow shaft, and the cavity in the suction pipe 5 is connected to a hose 7 connected to the end of the rotating shaft 8 via the manifold 7 and the rotating shaft 8. The other end of the hose 19 is connected to a suction machine (not shown), and air is drawn into the suction tube 5 from the slit-shaped suction port 6 by suction therefrom.
[0019]
When the suction pipe 5 comes into contact with the continuum 1, static electricity may be generated. However, the static electricity can be removed by bringing a metal molding or the like into contact with the continuum downstream of the edge cleaner.
[0020]
Next, the operation of the edge cleaner will be described.
When the web as the continuum 1 is passed through the rotary press, as shown in FIG. 4, the operation of the operation lever 16 causes the suction pipe 5 to be turned in a direction such that the suction tube 5 is separated from the running path of the continuum 1. If there is no obstacle to the threading, the suction tube 5 can be brought into contact with the continuous body 1 from the time of threading. Further, according to the width of the continuum 1, the fixing screw 11 for fixing the support frame 9 on the beam 10 is loosened and moved on the beam 10 to adjust the position of the suction tube 5.
[0021]
When the paper threading is completed, the operation lever 16 is operated in the reverse direction, and the suction tube 5 is pressed against the continuous body 1. Further, the suction of air from the suction pipe 5 is started.
The suction of air from the suction pipe 5 can be performed, for example, by turning on / off a suction pump by operating a push button of an operator or controlling a control panel of the printing press. Alternatively, a speed sensor may be provided on a guide roller or the like for guiding the continuum 1, and the power of the suction pump may be turned on when the continuum 1 reaches a certain speed, and turned off when the speed becomes lower than a certain speed.
[0022]
When operations such as printing are started and the continuum 1 runs, the slit-shaped suction port 6 of the suction pipe 5 rubs the edge 2 of the continuity 1 from both front and back sides, and paper dust and the like adhered to the edge 2 as shown in FIG. The dust 3 is sucked and removed. If the downstream edge 6a of the slit-shaped suction port 6 is made to protrude outside the upstream edge 6b as shown in FIG. 2 or FIG. 3, the edge 2 of the continuous body 1 is scraped by the downstream edge 6a. And the effect of removing paper dust can be enhanced.
[0023]
In this way, the continuum 1 from which the dust 3 such as paper dust is removed from the edge 2 is directed to a printing unit as shown in FIG. At the time of printing, since the debris 3 does not adhere to the edge 2, the generation of the stain on the blanket cylinder 4 as shown in FIG. 8 is prevented.
[0024]
The edge cleaner is installed immediately after the web feed roller in the case of a commercial printing rotary press, and after the cushion roller of the paper feeding device in the case of a rotary press provided with a paper threading chain. For example, in the case of an offset rotary press, as shown in FIG. In FIG. 5, reference numeral 20 denotes a reel stand for holding a roll 21 of web paper. The continuous body 1, which is a roll of paper unwound from the roll 21, passes through various guide rollers and heads to the right printing section. The suction tube 5 is disposed between guide rollers 22 and 23 that rotate at a fixed position before entering the printing section. The paper roll is directed to the printing unit after the dust 3 such as paper dust attached to the edge 2 is sucked and removed from the slit-shaped suction port 6 of the suction pipe 5. As shown in FIG. 2 or FIG. 3, the suction pipe 5 contacts the continuum 1 so as to press it from above and push it up from below, but the amount of pressing the suction pipe 5 against the continuum 1 is limited by the guide rollers 22 and 23 on both sides. It is adjusted according to the magnitude of the distance between them.
[0025]
Further, in the case of a business form printing machine, as shown in FIG. 6, a suction pipe 5 is provided after the processing section to remove scum and debris generated by sewing, punching, and the like by suction. You can also. This business form printing machine includes a punch unit 24, a horizontal sewing machine unit 25, a vertical sewing machine unit 26, a slitter unit 27, and the like for forming a marginal punch hole along the flow direction of the continuum 1. . Paper dust, punch residue, and the like generated in various processing units and adhered to the continuum 1 can be suctioned and removed by the suction pipe 5 in front of the product discharge unit 28.
[0026]
In addition, in a folding machine of a book gravure rotary press, a suction pipe may be provided on a traveling path of the paper after slitting the paper into a ribbon shape, and the paper powder and the like generated by the slit processing may be suctioned and removed. . In addition to the rotary press, when performing slit processing or the like while running the continuous body from the unwinder to the rewinder, it is also possible to remove debris such as slit residues and paper dust generated by the processing from the edge. .
[0027]
【The invention's effect】
According to the first aspect of the present invention, the suction pipes respectively protrude from the outside of the edge onto the front and back surfaces of the running web such as the running paper, and the slit-shaped suction ports of each suction pipe come into contact with the front and back surfaces of the web, respectively. Therefore, it is possible to remove paper dust, slit scum, punching scum, and other debris from the edge of a continuous body such as a roll of paper, prevent dirt on a rotary press, etc., and improve the quality of products such as printed matter. it can. In addition, since the suction pipe is disposed so as to be inclined toward the upstream side of the continuous body, the debris scraped from the edge is directed to the outside of the edge, so that the debris removing effect is enhanced.
[0028]
According to the invention of claim 2, the downstream edge of the slit-shaped suction port on the continuum is projected outside the upstream edge, and the edge of the continuum is scraped at the downstream edge. This increases the effect of removing paper dust and the like from the edge.
[0029]
According to the third aspect of the present invention, since the suction pipe on the front side and the suction pipe on the back side of the continuous body are connected in a fork shape and held integrally so as to be capable of normal and reverse rotation, the operation of moving the suction pipe to and from the continuous body is performed. Can be performed simply and quickly.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main part of an edge cleaner according to the present invention.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is a cross-sectional view of another embodiment of the edge cleaner.
FIG. 4 is a partially cutaway view showing the edge cleaner together with its attachment / detachment device.
FIG. 5 is a schematic side view showing a sheet feeding device of a rotary press equipped with an edge cleaner.
FIG. 6 is a schematic side view showing a business form printing machine equipped with an edge cleaner.
FIG. 7 is a schematic cross-sectional view of a continuum showing a state in which dust such as paper dust adheres to an edge.
FIG. 8 is a schematic perspective view of a printing unit of a blanket-to-blanket offset rotary printing press.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Continuum 2 ... Edge 5 ... Suction pipe 6 ... Slit-shaped suction port 6a ... Downstream side rim 6b ... Upstream side rim

Claims (3)

The suction pipes respectively protrude from the outside of the edge to the upstream side of the continuum on the front and back surfaces of the continuous body such as a running web, and the slit-shaped suction ports of each suction pipe contact the front and back surfaces of the continuum, respectively. An edge cleaner for a continuum such as a roll of paper, characterized in that: 2. The downstream edge of the slit-shaped suction port on the continuous body is projected outside the upstream edge, and the edge of the continuous body is scraped by the downstream edge. 2. An edge cleaner for a continuum such as a roll of paper described in 1. above. 3. A continuous body such as a roll of paper according to claim 1 or 2, wherein the suction pipe on the front side and the suction pipe on the rear side of the continuous body are connected in a fork shape and integrally held so as to be capable of normal and reverse rotation. Edge cleaner.

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