JP2001080036A - Foreign matter removing device for material to be printed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove foreign matter such as paper dust and the like from a side end of a material to be printed. SOLUTION: The foreign matter removing device comprises water retentive wiping members 15, 16 disposed to sandwich a feeding material 4 to be printed between front and rear surface of its side end 4b, urging means 34, 35 for urging the members 15, 16 to the end 4b of the material 4, and a water supply means 39 for supplying water to the members 15, 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter removing device for removing foreign matter such as paper dust adhered to both side edges of a printing material such as a roll of paper.

[0002]

2. Description of the Related Art Web presses such as BF (business form) printing presses, commercial web offset printing presses, and newspaper printing presses use a web as a material to be printed. Foreign materials such as paper dust, dust, and dust adhere to the surface of the web. If foreign matter adheres to the printing material, the adhesion of the printing ink will be poor, causing inconvenience such as a decrease in print quality. For example, in the case of offset printing, foreign matter adheres and accumulates on a blanket cylinder in contact with a printing material, adversely affects print quality, and therefore, the blanket cylinder needs to be cleaned frequently.

Conventionally, in order to avoid such inconveniences, a printing material is wiped by a wiping device and then used for printing.

[0004] Examples of the apparatus for wiping a printing material include those disclosed in JP-A-5-193112, JP-A-6-320711, and JP-A-7-256962.
The wiping device disclosed in Japanese Patent Laid-Open No. 5-193112 has a structure in which a diaphragm is opposed to a printing paper and a cloth is interposed therebetween. The paper is pressed against the paper, and the cloth is wiped with the cloth. The wiping device disclosed in JP-A-6-320711 sprays water from a nozzle onto the surface of a rotating chrome plating roller to form a water film on the roller surface, and brings the nonwoven fabric into contact with the roller having the water film formed thereon. At the same time, the nonwoven fabric is pressed against the surface of the running printing paper. The wiping device disclosed in Japanese Patent Application Laid-Open No. Hei 7-256682 discloses a wiping apparatus in which a chromium-plated roller is immersed in water in a watercraft and rotated to transfer a water film formed on the roller surface to a nonwoven fabric and to move the surface of printing paper running on the nonwoven fabric. To press.

[0005]

Art paper and coated paper, which are high-grade papers, are coated papers, so that little paper dust is generated from the surface of the paper. Many powders are generated. Therefore, when the web is coated paper or the like, it is more economical to intensively wipe both ends and the vicinity thereof.

[0006] Fine slitter dust and plasticizer powder adhere to the slitter surface of a film as a soft packaging material. Therefore, even when printing on a film using a gravure rotary press or the like, it is desirable to remove slitter dust and the like from the side end of the printing material in advance.

In addition, static electricity may be generated on the rolled paper or film, and if the amount of static electricity increases, the print quality may be degraded, and there may be a problem such as unevenness of the printed matter in the paper discharge section.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is arranged such that a running printing material (4) is sandwiched between its side ends (4a, 4b) from the front and back. Water-repellent wipes (15, 16),
Pressing means (34, 4) for pressing the wiping members (15, 16) against the side ends (4a, 4b) of the printing material (4).
35) and a water removing means (39 etc.) for supplying water to the wiping material (15, 16).

According to a second aspect of the present invention, the wiping members (15, 16) are strips fed from the vicinity of the center of the printing material (4) toward the side edges (4a, 4b). An apparatus (1) for removing foreign matter for printing material according to claim 1 is employed.

Further, in the invention according to claim 3, the pressing means (34, 35, etc.) includes the wiping member (15, 1).
6) from the back side to the side edge (4) of the printing material (4).
The foreign matter removing device (1) for a printing material according to claim 1 or 2, which is a pressing member (34, 35) for pressing against a, 4b).

According to a fourth aspect of the present invention, there is provided the printing apparatus according to any one of the first to third aspects of the present invention, which is installed on a traveling path of a printing material (4) between a paper feeding section (2) and a printing section (3). Item 3 employs the apparatus for removing foreign matter for printed material (1) according to any one of Items 3.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the foreign matter removing device 1 includes a printing material 4 between a paper feeding unit 2 and a printing unit 3 of a printing press.
It is installed on the traveling path. The printing press exemplified here is an offset rotary press, and has an infeed unit 5 between the paper feeding unit 2 and the printing unit 3. The paper as the printing material 4 fed from the take-up paper 11 loaded in the paper feeding unit 2 goes to the printing unit 3 after the tension is adjusted by various rollers 6. After being printed in one color or a plurality of colors on the front and back surfaces by the unit 3, the paper is discharged from a discharge unit (not shown). The foreign matter removing device 1 includes a printing material 4
Is disposed at a position where it travels in the substantially vertical direction in the in-feed unit 5, but may be disposed at another traveling position as long as it is located before the printing unit 3. The printing material 4 travels in the printing machine in the direction of the arrow at a speed of, for example, about 600 to 800 m / min.

[0014] As shown in FIG.
A cross beam 7 is provided so as to cross the printing material 4.
Two box-shaped frames 10 a and 10 b are held in a cantilever manner on the cross beam 7 via a guide rail 8 and a feed screw 9. The frames 10a and 10b are arranged corresponding to the left and right side edges 4a and 4b of the printing material 4, respectively.
Reference numerals 0a and 10b denote left and right end portions 4a and 4b of the printing material 4, respectively.
Are formed into substantially V-shaped notches 12a and 12b, respectively. The left and right halves of the feed screw 9 are left and right reversed screws, and the motor 13 attached to one end of the cross beam 7 is
Alternatively, the handwheel is rotated forward or backward by a manual handle. The rotation of the feed screw 9 by the drive of the motor 13 causes the left and right frames 10a and 10b to move symmetrically in the width direction of the printing material 4 with respect to the center of the printing press, and the width of the printing material 4 Move to the both side ends 4a and 4b whose positions in the printing press change in accordance with the size of. Further, when the side end 4b of the printing material 4 is detected in one of the frames 10b, the motor 13 is stopped and the frames 10a, 10b are stopped.
A sensor 14 composed of a light emitting and receiving device for causing the printing material 4 to face the left and right side edges 4a and 4b of the printing material 4 is attached.

The feed screw 9 is provided when the printing material 4 is passed through the center of the printing press. The printing material 4 is passed through one side of the printing press. In this case, the feed screw 9 is omitted, and the left and right frames 10a and 10b are adjusted by the operator in accordance with the positions of the left and right ends 4a and 4b of the printing material 4.

As shown in FIGS. 3 to 5, a running printing material 4 is placed in a right side frame 4b in the right frame 10b.
b, water-repellent wiping members 15 and 16 arranged so as to be sandwiched from the front and back sides, and pressing means for pressing the wiping members 15 and 16 against the right end 4 b of the printing material 4 are provided. Although not shown, in the left frame 10a, a wiping member for wiping foreign matter from the left end portion 4a of the printing material 4 is arranged symmetrically to that for the right end portion.

As the wiping members 15 and 16, for example, a width 1
A continuous sheet formed in a band shape of about 0 cm is used,
A feeding roll 15 in which the continuous sheet is wound in a roll shape.
a, 16a are cutouts 12 in each frame 10a, 10b.
a and 12b are attached to each other so as to sandwich them. One feeding roll 15a corresponds to the surface of the printing material 4 that has entered the notches 12a and 12b, and the other feeding roll 16a corresponds to the back surface of the printing material 4 that has entered the notches 12a and 12b. Both feeding rolls 15a,
The wiping materials 15 and 16 fed out from 16a are notches 1
After being stretched and overlapped along the contours of 2a and 12b, they are wound up as a collecting roll 17 in a state of being overlapped, and the collecting roll 17 for winding up the two strips of wiping material is attached to each frame 10a, 12b. 10b notch 1
It is provided at the back of 2a and 12b. Of course, the collecting roll 17 can be provided for each of the feeding rolls 15a and 16a.

The wiping members 15 and 16 are made of, for example, a nonwoven fabric having a water retention property. The wiping members 15 and 16 wipe off foreign matter such as paper dust from the left and right side edges 4a and 4b of the printing material 4 while containing water supplied from the water supply means. A mesh-like thing can be adopted as the wiping material,
In that case, foreign matter such as paper dust can be taken into the mesh. As the nonwoven fabric, for example, a cellulosic material can be used. Also, instead of nonwoven fabric, cotton cloth,
Cold gauze or the like can also be used.

The wiping members 15 and 16 are separated from the supply rolls 15a and 16a by the feeding means described below.
It is sent little by little toward 7.

That is, the notches 12a, 12b are provided at the entrance sides of the notches 12a, 12b in the respective frames 10a, 10b.
A pair of feed rollers 18 and 19 arranged to sandwich
Nip rollers 20, 21 for pressing the wiping members 15, 16 against the respective feed rollers 18, 19, and the notches 12a, 1
A guide roller 22 is provided on the back side of 2b, and the wiping members 15, 16 fed from the pair of feed rollers 15a, 16a are fed rollers 18, 1 respectively.
9 and nip rollers 20 and 21, are superposed around a guide roller 22, and are wound around a collection roll 17. The shafts of the feeding rolls 15a and 16a are supported by frames 10a and 10b via a friction clutch (not shown). As shown in FIG. 5, the pair of feed rollers 18 and 19 are connected to an air cylinder 23 fixed to the frames 10a and 10b via a link device 24, and each time the rod of the air cylinder 23 reciprocates. The wiping members 15 and 16 are pulled out from the feeding rolls 15a and 16a by a predetermined length by reciprocating angular movement by a predetermined angle. The predetermined length is, for example, 2 mm, and is fed out every minute. The nip rollers 20 and 21 are
Arms 24 and 25 supporting frames 0 and 21 and frame 10a,
The wipers 15 and 16 are constantly urged toward the feed rollers 18 and 19 by a spring or the like (not shown) interposed between the feed rollers 10 and 10b to press the wipers 15 and 16 against the surfaces of the feed rollers 18 and 19. As shown in FIG.
Is transmitted via gears 27a and 27b and a friction clutch (not shown). Thereby, the feeding roll 1
The wiping members 15 and 16 are pulled between the collection rolls 5a and 16a and the collection rolls 17 with appropriate tension without loosening.
The wiping members 15 and 16 are fed out of the feeding rolls 15 a and 16 a by the driving of the air cylinder 23, and the wiping members 15 and 16 are immediately taken up by the collection roll 17. As described above, the strip-shaped wiping members 15 and 16 intermittently travel to the collection roll 17 via the feed rollers 18 and 19 and the guide roller 22, so that the both end portions 4 of the printing material 4.
a) and 4b are wiped with foreign substances.
When viewed in the width direction of the printing material 4,
Moving from the vicinity of the center to the side ends 4a and 4b, the reattachment of the removed paper dust and the like to the printing material 4 is prevented.

As shown in FIGS. 4 and 5, other arms 28 and 29 are fixed to the support shafts of the arms 24 and 25 that support the nip rollers 20 and 21, and cams are attached to the other arms 28 and 29. The operation levers 32 and 33 are attached to the cams 30 and 31, respectively. When the cams 30, 31 are turned by operating the operation levers 32, 33, the nip rollers 20, 21 are separated from the feed rollers 18, 19, so that the operation of attaching and detaching the wiping members 15, 16 is simplified. The feed rollers 18 and 19, the guide roller 22 and the like may be provided with a crown as necessary,
6 is prevented from being pulled by the contacting printing material 4.

Further, the wiping members 15 and 16 can be fixedly used when their foreign matter intake capacity is large.
It may be replaced every time a predetermined time elapses.
Further, the feeding rolls are mounted on the frames 10a and 10b one by one, so that one wiping member is reversed from one side or the back side of the printing material 4 to the back side or the front side with respect to one end of the printing material 4. You may send and wipe the side edge. In order to wipe only one side end of the printing material 4, the frames 10a,
10b and the like can be provided on only one side.

The pressing means is constituted as pressing members 34, 35 for pressing the wiping members 15, 16 from the back surface thereof to both side ends 4a, 4b of the printing material 4. Although the pressing members 34 and 35 are formed in a roller shape, the rollers may be rotatable or fixed so as not to rotate. Further, the pressing members 34 and 35 may be formed in other shapes such as a semi-cylindrical shape. As shown in FIG. 6, a pair of pressing members 34 and 35 are provided so that the wiping members 15 and 16 can be pressed against the side edges 4a and 4b of the running printing material 4 with an appropriate force. It is displaced in the running direction and is pushed into the opposite side of the printing material 4. 4 and 6, the pressing member 3
4 and 35 are driven by air cylinders 36 and 37 fixed to the frames 10a and 10b to drive the side ends 4 of the printing material 4.
a, 4b can be contacted and separated.

The surfaces of the pressing members 34 and 35 may be covered with a simple rubber layer or may be covered with a porous layer. The porous layer is formed as a thin surface layer on the surface of a relatively hard and stiff roller body, and has a property that water easily permeates and water easily oozes out when pressed against the wiping members 15 and 16. The surface of the porous layer is smoothed so as not to generate a large frictional force with the wiping members 15 and 16. The porous layer can also be formed by covering a surface of a rubber roller, a metal roller, or the like with a resin sleeve having a water retention property, or by winding a cloth or string made of a fiber such as cotton.

The water supply means for supplying water to the wiping members 15 and 16 includes a water supply tank 3 as shown in FIGS.
8, a conduit 39 for supplying water from the water supply tank 38 to the pressing members 34, 35, solenoid valves 40, 41 provided on the conduit 39, and the distal end of the conduit 39 having the pressing members 34, 35.
Nozzles 42 and 43 attached to a location facing 35. An appropriate amount of water in the water supply tank 38 is sent into the conduit 39 by opening and closing the electromagnetic valves 40 and 41, and the nozzle 4
2 and 43 are discharged onto the pressing members 34 and 35.
The water discharged from the nozzles 42 and 43 is
4 and 35 soak into the wiping members 15 and 16. The wiping members 15 and 16 are used in a wet state containing water.
Foreign matter is wiped from both side ends 4a and 4b of the. When printing is stopped, the solenoid valves 40 and 41 are closed and the wiping members 15 and 1 are closed.
Turn off the water supply to 6. Of course, nozzles 42 and 43
Is made to face the wiping members 15, 16, so that the water is not pressed through the wiping members 15, 1 through the pressing members 34, 35.
6 can also be supplied directly.

Next, the operation of the foreign matter removing device will be described.

Prior to the start of the printing press, the motor 1 is driven in accordance with the position of both side edges 4a and 4b of the printing material 4 in the printing press.
The position adjustment of the frames 10a and 10b is performed by the drive of 3. The feed screw 9 rotates and the frames 10a, 10b
Move on the guide rail 8, and when the sensor 14 catches the side end 4b of the printing material 4, the frames 10a and 10b stop. As a result, as shown in FIGS. 3 to 5, the wiping members 15 and 16 sandwich the both end portions 4a and 4b of the printing material 4 from the front side and the back side, respectively.

On the other hand, water is supplied from the water supply tank 38 to the nozzles 42 and 43 by opening and closing operations of the solenoid valves 40 and 41. The water discharged from the nozzles 42 and 43 adheres to the wiping members 15 and 16 via the pressing members 34 and 35 and soaks.

When the printing press is started and the printing material 4 starts to travel from the paper feeding section 2 to the printing section 3, the pressing members 34, 35 are driven by the air cylinders 34, 35 so that the pressing members 34, 35 are moved from the solid line position in FIG. The printing material 4 is moved to the dashed line position, and the wiping members 15 and 16 are pressed against the front and back surfaces of the both ends 4 a and 4 b of the printing material 4. Thereby, both end portions 4a, 4b of the printing material 4 are formed.
Are wiped with wiping materials 15 and 16, respectively.
Foreign matter such as paper powder attached to the a and 4b is wiped off. In addition, an appropriate amount of water is given to remove static electricity. The printing material 4 from which the foreign matter has been removed from both side edges 4a and 4b and the static electricity has been removed in this way is directed to the printing unit 3 of the printing press and printed on both front and rear surfaces or one surface.

The wiping members 15 and 16 adsorb and remove foreign matter such as paper dust from both side edges 4a and 4b of the printing material 4 through the permeated water. Paper dust and the like become mud-like with water, and are captured in the fibers or meshes of the wiping materials 15 and 16,
Collected together with the wiping members 15 and 16 on the collection roll 17. The wiping members 15 and 16 are slackened by a predetermined length from the vicinity of the central portion of the printing material 4 toward the side edges 4a and 4b by a predetermined length by the action of the air cylinder 23, the motor 26, the friction clutch and the like. It is paid out without. The wiping members 15 and 16 are arranged from the vicinity of the central portion of the printing material 4 to the side edges 4a,
Since the paper is sent toward the printing material 4b, the foreign matter once captured by the wiping materials 15 and 16 does not adhere to the printing material 4 again.

When the speed of the printing material 4 is reduced or stopped due to interruption of printing or the like, the air cylinders 36 and 37 are used.
, The pressing members 34 and 35 and the wiping members 15 and 16 are separated from the surface of the printing material 4 and the supply of water is stopped. As a result, the printing material 4 is broken,
Excessive moistening of the wiping members 15, 16 is prevented.

[0032]

According to the first and fourth aspects of the present invention, foreign matter such as paper dust can be removed from the side edge of the printing material to which the foreign matter is particularly likely to adhere, and proper printing can be performed.

According to the second aspect of the invention, it is possible to prevent foreign substances wiped by the wiping material from re-adhering to the printing material.

According to the third aspect of the present invention, the wiping material can be appropriately pressed against the material to be printed to enhance the effect of wiping foreign matter.

[Brief description of the drawings]

FIG. 1 is an elevational view showing a printing machine equipped with a foreign matter removing device according to the present invention.

FIG. 2 is a perspective view showing an overview of a foreign matter removing device.

FIG. 3 is a perspective view showing the inside of the foreign matter removing device.

FIG. 4 is a plan view showing a foreign matter removing device.

FIG. 5 is a bottom view showing the foreign matter removing device.

FIG. 6 is an elevation view showing a pressing member of the foreign matter removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Foreign-matter removal apparatus 2 ... Paper supply part 3 ... Printing part 4 ... Material to be printed 4a, 4b ... Side end part 15, 16 ... Wiping material 34, 35 ... Pressing member 39 ... Conduit

Claims (4)

[Claims] 1. A water-repellent wiping member disposed so as to sandwich a running printing material from the front and back at a side end thereof, pressing means for pressing the wiping material against a side end of the printing material, And a water supply means for supplying water to the wiping material. 2. The apparatus according to claim 1, wherein the wiping material is a strip fed from a vicinity of a central portion of the printing material toward a side end. 3. The printing material according to claim 1, wherein the pressing means is a pressing member for pressing the wiping material from a back surface thereof to a side end of the printing material. Foreign matter removal device. 4. The printing medium according to claim 1, wherein the printing medium is provided on a traveling path of the printing medium between a paper feeding section and a printing section of the printing press. Foreign matter removal device.