JP2005067187A - Printing material cleaning device, and printing material cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing material cleaning device and a printing material cleaning method capable of improving the printing quality and the printing efficiency by effectively removing particles deposited onto the surface of a printing material on which printing is to be performed. <P>SOLUTION: A nozzle 3 for oscillating printing materials 12 by providing an air flow from a fan 2 to a storage box 4 is disposed in the open side of the storage box 4 storing the printing materials 12. The storage box 4 and the nozzle 3 are movable, so that the relative positions of the storage box 4 and the nozzle 3 can be changed. By use of this device, the printing materials 12 are oscillated, thereby removing particles deposited onto the surfaces of the printing materials 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a printing material cleaning apparatus and a printing material cleaning method for removing dust adhering to the surface of a printing material made of paper, resin, or the like supplied to a printing press.

Printing on printing materials made of paper, such as business cards and postcards, has often been performed in the past, and in recent years, resin cards, such as telephone cards, have been used. Printing is also frequently performed.
Used paper and recycled paper are often used for the production of business cards and the like, and paper dust tends to adhere to the surface of the paper when these are cut. Further, in order to prevent undried printing ink from being transferred to another printing material and blocking it during printing, an anti-blocking powder is often sprayed on the surface of the printing material. As a result, a large amount of dust adheres to the surface of the printing material.

  If dust adheres to the surface of the printing material in this way, the dust is transferred to the rollers of the printing press, and the state of friction between the rollers and the printing material being fed changes. In this case, the printing material cannot be moved normally. Therefore, a paper jam or oblique printing occurs, and the printing quality is deteriorated. When such a phenomenon occurs, an operation for cleaning the rollers of the printing press and restoring the frictional state of the rollers has been performed.

As a method for removing dust adhering to the surface of a printing material, loosening the printing material manually has been performed. However, this method has a poor working efficiency and an insufficient effect.
As a technique related to dust removal, Patent Document 1 describes a method of removing paper dust using static electricity and air shower, and Patent Document 2 describes an apparatus for removing powder for preventing blocking by air injection. .

JP-A-7-205407 JP 2003-320642 A

  The invention described in Patent Document 1 deposits a printing material such as paper having a uniform shape, and removes fine paper dust adhering to the periphery by static electricity and air shower. However, this method cannot remove paper dust and anti-blocking powder adhering to the printing surface and the back surface of the printing material. For this reason, when these printing materials are supplied to the printing press, the printing materials are not normally moved inside the printing press, and problems such as paper jams and oblique printing occur.

  Further, the invention described in Patent Document 2 ejects air at the time of transfer for supplying the printing material from the printing material storage unit to the printing roller unit, and removes paper dust and anti-blocking powder. However, this method has a trade-off relationship that the position of the printed material is out of order if the air jet strength is increased, and the blocking prevention powder is not sufficiently removed if the jet strength is weakened. Moreover, in order to perform air jet in the vicinity of the printing roller, the removed paper dust and anti-blocking powder must be completely collected. If the dust collection is incomplete, the removed dust will adhere to the printing roller, causing problems such as paper jams and oblique printing.

  In this way, a lot of dust adheres to the surface of the printing material, and if it is supplied to the printing machine as it is, paper jams and dirt on the printing roller surface occur inside the printing machine, and printing quality such as oblique printing is deteriorated. It will cause a decline. Further, the operation is interrupted due to the interruption of printing due to a paper jam or the cleaning operation of the surface of the printing roller, and the productivity is lowered. In addition, the roller is cleaned using a cleaning liquid such as alcohol. However, this cleaning causes the surface of the roller to wear and causes the life of the roller to be shortened.

  The present invention has been made in consideration of such circumstances, and it is possible to reliably remove the dust adhering to the surface of the printing material and to improve the printing quality and the printing efficiency. An object is to provide a cleaning device and a printing material cleaning method.

  In order to solve the above-described problems, the present invention is directed to vibrate the printing material by blowing an airflow from a blower or a suction device to the storage box on the opening side of the storage box in which the printing material is stored. A printing material cleaning apparatus, wherein a nozzle is disposed, the storage box or the nozzle is movable, and a relative position between the storage box and the nozzle is variable.

  Due to the wind pressure when air is blown to the storage box by the nozzle, the printing materials aligned in the storage box are divided into two parts to the left and right with the wind flow from the nozzle as a boundary to form a wind passage. The wind flow path means a wind passage having a width approximately equal to the lateral width of the nozzle. When the airflow passes through the gaps between the printing materials adjacent to the left and right of this air flow path, the airflow reduces the air pressure between the printing materials and brings the printing materials closer together. When the gap between the printing material and the printing material widens, the airflow passes through the gap and the atmospheric pressure decreases, and the printing material approaches. In this way, the printing material vibrates by repeatedly approaching, colliding, and separating in accordance with a change in pressure between adjacent printing materials.

In the present invention, since the storage box or the nozzle can be moved and the relative position between the storage box and the nozzle is variable, the vibration of the printing material due to the mechanism described above is used for printing stored in the storage box. It can be propagated to all of the material. By this action, the dust adhering to the surface of the printing material can be removed by vibration, and the dust that has fallen off from the surface of the printing material by the airflow can be excluded from the storage box.
Here, the printing material includes not only paper business cards and postcards, but also those made of resin typified by a telephone card.

In the present invention, the blower opening of the nozzle has a flat shape elongated in the height direction of the storage box.
By making the air outlet of the nozzle like this, the wind blown from the nozzle forms a long and narrow air flow in the height direction of the storage box, so the printing material aligned in the storage box is the nozzle. The wind flow path is formed by being divided into right and left by the wind flow from the side. When the wind flow passes through the gaps between the plurality of printing materials adjacent to the left and right of the wind flow path, the printing material can be effectively vibrated by the change in the atmospheric pressure.

The present invention has a means for detecting the end of the storage box or the printing material aligned and stored in the storage box, and reverses the moving direction of the printing material and the air blowing or suction port. To do.
By detecting the end of the printing material stored in the storage box or in the storage box, the moving direction of the printing material and air blower or suction port can be reversed, so the cleaning operation is automatically repeated. be able to. As the detection means, a limit switch, a magnetic proximity switch, an optical switch, or the like can be used. The switching of the moving direction can be realized by switching the rotation direction of the moving motor, switching with a gear, or the like.

The present invention is characterized in that there is provided means for collecting dust that has passed through and separated from the printing material.
The air that passes between the printing materials contains dust that has been peeled off from the printing materials, and when this dust is dissipated, the working environment is deteriorated. In addition, when the scattered dust is sucked into and adhered to the printing press, the printing quality is lowered and workability is deteriorated. Therefore, the air that has passed between the printing materials of the cleaning device is sucked and the separated dust is collected by a filter or the like and then released to the atmosphere. As a result, the work environment is kept clean and it is possible to contribute to the reduction of failures in various devices including the printing device.

According to the present invention, the storage box storing the printing material has an air flow path between the terminal portion of the printing material and the inner wall of the storage box even when the maximum number of printing materials is stored. A gap is provided so as to be formed.
In the present invention, it is indispensable that a flow path of air is formed in the printing material. To facilitate the formation of the flow path, the printing material is stored even when the maximum amount of the printing material is filled. A gap is provided between the inner wall of the box and the end of the aligned printing material. Thereby, the flow path is easily formed, and the end of the filled printing material can be reliably cleaned. In order to form the gap, a gap forming device may be provided on the inner wall of the storage box or the terminal end press in contact with the terminal of the printing material. In the “open” state, the gap forming device is configured such that protrusions appear on the printing material side, and in the “closed” state, the protrusions are stored. Thus, the printing material can be filled in the “open” state, and the gap can be formed by switching to the “closed” state after filling.

The present invention has means for detecting the occurrence of vibration of the printing material due to air blowing or air suction, and means for adjusting the air volume by adjusting the fan rotation speed of the blower or the suction valve or discharge valve of the air suction machine. It is characterized by having.
There are a wide variety of printing materials used for printing, and the sizes and masses are different. Therefore, the air volume required to vibrate these printing materials differs depending on the air blowing or suction, and the air volume must be adjusted each time. The adjustment of the air volume can be realized by adjusting the opening degree of the suction valve or discharge valve of the blower or air suction machine, or by adjusting the rotation speed of the blower or air suction machine using an inverter or the like.
In addition, it is equipped with a vibration detection device for printing materials, and the vibration detection device detects the valve opening and rotation speed at which vibration starts, and can operate the blower or air suction device in the minimum necessary state. I have to. As an example of a vibration detection device for a printing material, it can be realized by measuring the number of times of switching per unit time using an optical switch formed of a light emitting / receiving element. It is also possible to install a microphone in the vicinity of the storage box for the printing material and determine that vibration has occurred when the detected sound exceeds a preset frequency.

The present invention is characterized by having means for applying mechanical vibrations in the antigravity direction to the printing materials arranged and stored in the storage box, and reducing the apparent weight of the printing materials.
By applying mechanical vibration in the antigravity direction to the printing material, the apparent weight of the printing material can be reduced, and the generation of vibration of the printing material can be easily realized. The mechanical vibration in the antigravity direction can be realized by attaching a printing material storage box to a vibration transport machine or the like.

The present invention is characterized by having means for guiding air, which has been dust-removed after passing through the printing material, to a blower.
Thereby, since the flow of wind is made into the closed type, the dust after dust removal does not leak to the outside, and the noise becomes difficult to leak to the outside.

The present invention aligns printing materials, blows or sucks air between the printing materials to form air flow paths, and faces the flow material portions and flow paths. This is a printing material cleaning method characterized in that the printing material is vibrated by the pressure difference between it and the part that is not present to remove dust adhering to the surface of the printing material and clean the printing material. is there.
Paying attention to one leaf (first leaf) of the printing material forming the flow path, a portion facing the flow path and in contact with the air flow and a portion having no air flow corresponding to the back surface thereof Have. A differential pressure is generated by Bernoulli's theorem between the part that faces the air flow path and the part that does not face the flow path. Move to the roadside.

  When the printing material moves, the distance on the side where the air flow path has been formed becomes smaller, and the flow velocity of the air decreases. At the same time, on the side that did not face the air flow path, the movement of the printing material increases the distance from the subsequent second leaf, and the flow velocity of air passing through this distance increases. A new air flow path is formed. As a result, a phenomenon similar to that described above occurs, and the first leaf of interest moves to the higher air flow velocity and again comes into close contact with the second leaf. This phenomenon is repeated while an air flow is formed between the printing materials by air blowing or air suction, and the first one leaf vibrates. Dust adhering to the surface of the printing material can be peeled off by this vibration.

The present invention is characterized in that the relative position between the aligned printing materials and the air blowing port or suction port is variable.
Accordingly, air flow paths can be sequentially formed in the aligned printing materials, and a large amount of printing materials can be efficiently cleaned. In order to sequentially form the air flow path, the relative positions of the printing material and the air blowing or suction port may be changed. That is, the storage box for the printing material may be moved, the air blowing port or the suction port may be moved, or both of them may be moved.

  According to the present invention, since dusts adhering to the surface of the printing material can be efficiently removed by causing vibration of the aligned printing materials, printing can be prevented while preventing paper jams and oblique printing during printing. Quality can be improved. Further, since the number of times of cleaning the rollers of the printing press can be reduced during printing, the printing time can be shortened and the working efficiency can be improved. Furthermore, since it is not necessary to frequently clean the rollers of the printing press, the life of the printing press can be improved.

Hereinafter, the present invention will be described based on the embodiments.
FIG. 1 is a perspective view of a printing material cleaning apparatus according to an embodiment of the present invention. In the perspective view, the top plate 11 of the storage box 4 is not shown for convenience of explanation. FIG. 2 shows a plan view of a printing material cleaning apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line AA ′ in FIG.

  In this cleaning apparatus, a movable storage box 4 is disposed on a drive transmission base 9, and a printing material 12 is aligned and stored in the storage box 4. The storage box 4 includes a top plate 11 to prevent the stored printing material 12 from being dissipated. In order to efficiently supply the blown air to the storage box 4, the depth of the top plate 11 is made larger than that of the storage box 4. The blower 2 blows air to the printing material 12 and forms an air flow path between the leaves of the printing material. Reference numeral 1 denotes a basic pedestal.

The movement of the storage box 4 will be described with reference to FIG. In this embodiment, the screw machining shaft 7 is rotated by the DC motor 5. When the threaded shaft 7 rotates, the nut 8 attached thereto moves, the drive transmission base 9 connected to the nut 8 also moves, and the storage box 4 on the drive transmission base 9 also moves accordingly. As a result, the relative positions of the storage box 4 and the blower 2 change, and the stored printing materials 12 can be cleaned sequentially.
The polarity of the DC power supplied to the DC motor 5 can be reversed by moving the storage box 4 to operate the first limit switch 6a or the second limit switch 6b. As a result, the moving direction of the storage box 4 can be reversed, and the cleaning operation can be repeated.

FIG. 4 is a cross-sectional view taken along the line BB ′ in FIG. The frame 10 shown in FIG. 4 is provided in the storage box 4 and is arranged so that the printing material is not dissipated even during blowing.
When the printing material is stored in the storage box 4 having the structure described above and blown from the blower 2, air flow paths are formed between the printing materials, and the printing material starts to vibrate. The vibration of the printing material will be described with reference to FIG.

As shown in FIG. 5A, the blower 3 blows air to the aligned printing materials 12a to 12d, and an air flow path indicated by a frame arrow is formed between the printing materials 12a and 12c. In accordance with Bernoulli's theorem, a differential pressure is generated between the air flow path side (A surface of 12a) and the non-flow path side (B surface of 12a), and the printing material 12a has an air flow indicated by an arrow. Receives power toward the roadside. This phenomenon also occurs in the printing material 12c, and the printing materials 12a and 12c are in close contact with each other. As a result, as shown in FIG. 5B, the gap between the subsequent printing materials 12b and 12d is enlarged, and the flow velocity of the air flowing between the printing materials 12a and 12b and 12c and 12d is increased. To do. As a result, the printing materials 12a and 12c move under the force indicated by the arrow in FIG. 5B according to Bernoulli's theorem, resulting in the state shown in FIG. 5C. FIG. 5C is the same state as FIG. 5A, and as long as air is blown, the printing material repeats the state of FIG. 5A and the state of FIG. 12a and 12c vibrate.
Due to this vibration, dust such as paper dust and anti-blocking powder attached to the surface of the printing material 12 is peeled off, and the printing material 12 can be cleaned.

  A second embodiment of the present invention is shown in FIG. In this embodiment, an air suction device 14 that blows air to the printing material 12 and is provided with an air filter 13 on the downstream side is arranged to strengthen the formation of an airflow that flows between the printing materials 12, and from the printing material 12. The peeled dust is collected by an air filter so that the dust can be prevented from being scattered in the work environment. By collecting the dust in this way, the work environment can be maintained and maintained, dust can be prevented from entering the inside of the printing press, and the occurrence of failure of the printing press can be reduced.

  A third embodiment of the present invention is shown in FIG. In this embodiment, the air blown to the printing material 12 is a sealed type, and the air in the air filter chamber 16 is circulated to the printing material 12. The storage box 4 in which the printing material 12 is arranged and arranged is attached so as to be movable in the box 15, and air from the blower 2 is blown to the printing material 12 by the nozzle 3. The dust separated from the surface of the printing material 12 is collected by the air filter 13, and the air from which the dust has been removed diffuses into the air filter chamber 16. This air is sent to the blower 2 by a tube 17 connecting the air filter chamber 16 and the blower 2, and is blown to the printing material 12 by the nozzle 3.

In this embodiment, since clean air from which the dust peeled off from the surface of the printing material 12 has been removed is circulated and used, not only can dust be prevented from diffusing to the surroundings, but the air does not leak to the outside, Dust removal efficiency can be increased. That is, since the rotation speed of the motor of the blower 2 can be reduced, generation of noise can be suppressed.
In this embodiment, in order to prevent the heat generated by the blower 2 from accumulating, a panel made of a material having good thermal conductivity is brought into close contact with the heat generating part, and the panel is exposed to the outside to dissipate heat. can do.

When cleaning business cards, the storage width of the storage box 4 is about 12 cm, and when storing the printing material 12 stored in the storage box 4, the storage box 4 has a width of about 1 cm which is the same as the width of the nozzle outlet. It is preferable to set so as to form a marginal width of ˜1.5 cm where the printing material 12 is not accommodated.
Due to the existence of this margin width, the bundle of printing materials can be divided into two by the wind flow from the nozzle, so that the above-described air flow passage can be effectively formed, and the printing material 12 can be vibrated. The vibration width can be secured.

  In the case of the storage box 4 having the storage width, the number of printing materials 12 to be cleaned at a time is preferably about 700 to 1000.

  Further, the height of the storage box 4 is slightly higher than the height of the printing material 12 to be stored, and a gap of about 5 mm is provided between the stored printing material 12 and the top plate 11 of the storage box 4. It is good. Due to this gap, the aligned printing materials 12 are allowed to vibrate in the vertical direction, and dust can be removed more effectively.

  In order to remove dust adhering to the surface of the printing material 12 by blowing to the printing material 12 by the above-described method, the shape of the air blowing port of the nozzle 3 is a flat shape that is long in the height direction of the storage box 4. It is preferable that By setting the air blowing port of the nozzle 3 to such a shape, the shape of the airflow sent to the printing material 12 can be made a shape in which the printing material 12 is likely to vibrate. The height of the air outlet of the nozzle 3 is preferably about the same as the height of the storage box 4. Moreover, the horizontal width of the ventilation opening of the nozzle 3 shall be 1 cm-1.5 cm. This width is approximately the same as the margin when storing the printing material 12 in the storage box 4, that is, the width of the portion where the printing material 12 is not stored.

In this embodiment, the moving speed of the storage box 4 can be changed by the rotational speed of the DC motor 5 and the length of the screw pitch of the threaded shaft 7 to be connected. For example, if the screw pitch length of the thread machining shaft 7 is 1 mm, the drive speed can be 5 mm / s if the motor rotation speed is 5 rotations per second. That is, a driving speed of 5 mm / s can be obtained with a motor of 300 revolutions per minute.
The moving means and the moving speed adjusting means of the storage box 4 shown here are merely examples, and the present invention is not limited to these.

  The relative movement speed between the storage box 4 and the nozzle 3 is preferably 5 mm / s or more and 7 mm / s or less. If the moving speed exceeds 7 mm / s, the moving speed is too high to effectively cause vibration of the printing material 12. On the other hand, a moving speed of less than 5 mm / s is not preferable because the moving speed is too slow and the efficiency of the cleaning operation is reduced.

  When the business card is cleaned using the cleaning device described above, a total of about 20000 business cards can be continuously printed without cleaning the rollers of the printing press. The required time was about 25 minutes. During this time, printing is performed automatically, so that the worker can engage in other work. On the other hand, if business cards are printed without being cleaned by the cleaning device described above, the printing material is clogged every time about 300 sheets are printed, causing problems such as printing misalignment. It was necessary to perform cleaning. Since it takes about 20 minutes to clean the rollers, the time required to print 1000 business cards including this printing interruption time is about 1 hour. During this time, it is necessary for the operator to monitor the printing status, and the operator is restrained by the operation for about one hour.

Thus, the printing time can be greatly shortened by using the printing material cleaning apparatus of the present invention. In addition, when the printing is interrupted and the rollers are cleaned, it is necessary to make settings in order to make the printing ready again after cleaning, and the operator is restrained during that time, but the printing material cleaning device of the present invention is used. By using it, the convenience of operation at the time of printing is also improved.
In addition, when the printing material cleaning apparatus of the present invention is used, printing deviation does not occur and printing quality can be improved. Furthermore, since it is not necessary to frequently clean the rollers of the printing press, the life of the printing press can be improved.

  The present invention can be used as a printing material cleaning device for removing dust adhering to the surface of a printing material made of paper, resin, or the like. Further, it can be used as a device for removing foreign substances such as chips adhering in a processing process of paper, plastic or the like.

1 is a perspective view of a printing material cleaning apparatus according to an embodiment of the present invention. It is a top view of the printing material cleaning apparatus. It is A-A 'sectional drawing of the printing material cleaning apparatus shown in FIG. FIG. 4 is a B-B ′ sectional view of FIG. 3. It is a figure explaining the vibration phenomenon of the raw material for printing. It is a figure which shows 2nd Embodiment of this invention equipped with the filter in order to collect the dust in exhaust air in the raw material cleaning apparatus for printing. It is a figure which shows 3rd Embodiment of this invention provided with the function to circulate and blow the air of an air filter chamber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Basic base 2 Blower 3 Nozzle 4 Storage box 5 DC motor 6a 1st limit switch 6b 2nd limit switch 7 Screw processing shaft 8 Nut 9 Drive transmission base 10 Frame 11 Top plate 12 Printing material 13 Air filter 14 Air suction Machine 15 Box 16 Air filter chamber 17 Tube

Claims (10)

  On the opening side of the storage box in which the printing material is stored, a nozzle is arranged to vibrate the printing material by blowing an air flow from a blower or a suction device to the storage box, and the storage box or the nozzle is moved. The printing material cleaning apparatus according to claim 1, wherein the relative position between the storage box and the nozzle is variable.   The printing material cleaning apparatus according to claim 1, wherein the air blowing port of the nozzle has a flat shape elongated in a height direction of the storage box.   2. The apparatus according to claim 1, further comprising means for detecting an end of the printing material stored in the storage box or the storage box, wherein the moving direction of the printing material and the air blowing port or suction port is reversed. Or the printing material cleaning apparatus of 2 description.   4. The printing material cleaning device according to claim 1, further comprising means for collecting dust that has passed through and separated from the printing material.   In the storage box for storing the printing material, an air flow path is formed between the terminal portion of the printing material and the inner wall of the storage box even when the maximum number of printing materials is stored. 5. A printing material cleaning apparatus according to claim 1, wherein a gap is provided in the printing material cleaning apparatus.   It has means for detecting the occurrence of vibration of the printing material due to air blowing or air suction, and has means for adjusting the air volume by adjusting the rotation speed of the fan of the blower or the suction valve or discharge valve of the air suction machine A printing material cleaning device according to any one of claims 1 to 5.   7. The printing material arranged and stored in the storage box is provided with means for applying mechanical vibration in an anti-gravity direction to reduce the apparent weight of the printing material. Printing material cleaning equipment.   The printing material cleaning apparatus according to claim 1, further comprising a unit that guides air, which has been dust-removed after passing through the printing material, to a blower.   The printing materials are aligned, air is blown or sucked between the printing materials to form an air flow path, and a portion facing the flow path of the printing material and a portion not facing the flow path A method for cleaning a printing material, wherein the printing material is vibrated by a differential pressure generated in between to remove dust adhering to the surface of the printing material and to clean the printing material.   10. The printing material cleaning method according to claim 9, wherein a relative position between the arranged printing materials and an air blowing port or a suction port is variable.

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