JPH1170641A - Apparatus for washing printing cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the removing effect of the contaminant such as ink, paper powder or the like bonded to the outer peripheral surface of a printing cylinder to a large extent, to reduce manual wiping-off work after mechanical washing, to simply and inexpensively constitute a structure and to reduce running cost. SOLUTION: A washing apparatus for washing the outer peripheral surface of a printing cylinder includes a plurality of washing soln. jet nozzles 14 arranged along th axial direction of a printing cylinder (e.g. impression cylinder 1), a washing soln. supply pipe 13 for supplying a washing soln. 16 to the washing soln. jet nozzles 14, the blade 6 parallelly arranged along the axial direction of the printing cylinder 1 and brought into contact with the outer peripheral surface of the printing cylinder 1 at its leading end part and a vibration means (ultrasonic vibrator) for vibrating the blade 6 in the direction coming into contact with and separating from the outer peripheral surface of the printing cylinder 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a printing cylinder which cleans dirt such as ink and paper dust adhering to an outer peripheral surface of a printing cylinder (for example, an impression cylinder) installed in a printing apparatus. is there.

[0002]

2. Description of the Related Art Dirt such as ink or paper dust adheres to the outer peripheral surface (surface) of various printing cylinders such as ink rollers used in a printing apparatus. A cleaning device for cleaning paper powder and the like is provided. Note that various types of cleaning devices have been conventionally proposed.

FIGS. 6 and 7 are diagrams for explaining examples of a conventional printing cylinder outer peripheral surface cleaning apparatus provided in a printing apparatus, respectively, and illustrate the structure of an impression cylinder unit. The cleaning device illustrated in FIG. 6 has a plurality of cleaning liquid spray nozzles 14 arranged along the axial direction of the impression cylinder (printing cylinder) 1 and is arranged side by side along the axial direction of the impression cylinder 1. The cleaning liquid supply pipe 13, the nonwoven fabric supply roller 28, the nonwoven fabric take-up roller 29, and the guide roller 30, which are arranged side by side along the axial direction of the impression cylinder 1, and the sponge 32 fixed to the upper end via the mounting plate 31. It is composed of a pair of air cylinders 7a and 7b that move up and down, a cleaning liquid container 15, and the like. The non-woven fabric supply roller 28, the non-woven fabric take-up roller 29, and the guide roller 30 are rotatably mounted on a pair of frame portions (not shown) disposed at both axial ends of these rollers. The air cylinders 7a and 7b are attached to a support member (not shown) provided between the pair of frame portions.

The above-mentioned nonwoven fabric 3 is wound around a non-woven fabric supply roller 28 and a non-woven fabric take-up roller 29 at both ends thereof, and is wound around the non-woven fabric supply roller 28 by a guide roller. It is configured to be wound around a nonwoven fabric take-up roller 29, passing between the outer peripheral surface of the impression cylinder 1 and the outer peripheral surface of the sponge 32. That is, by operating the motor 4 in a state where the nonwoven fabric 3 is unwound by the nonwoven fabric supply roller 28 and rotating the nonwoven fabric take-up roller 29, the nonwoven fabric 3 wound around the nonwoven fabric supply roller 28 is guided. It is moved between the outer peripheral surface of the impression cylinder 1 and the outer peripheral surface of the sponge 32 via the roller 30, and is thereafter wound up by the nonwoven fabric winding roller 29 and collected.

On the other hand, the pair of air cylinders 7a, 7b
In order to avoid collision between the paper gripping claws 18 protruding from the outer peripheral surface of the impression cylinder 1 and the nonwoven fabric 3, an electric signal from an encoder (not shown) connected to the shaft of the impression cylinder 1 is used. It is controlled to expand and contract at an appropriate timing based on the signal. That is, the pair of air cylinders 7a and 7b are respectively set to the contracted state immediately before the pawl 18 rotating together with the impression cylinder 1 collides with the nonwoven fabric 3 sliding on the outer peripheral surface of the sponge 32. The configuration is such that collision of the claws 18 with the nonwoven fabric 3 is avoided. Immediately after the pawl 18 passes through the area corresponding to the sponge 32, the pair of air cylinders 7a and 7b are set in the extended state, and accordingly, the nonwoven fabric 3 is pressed by the sponge 32 and the impression cylinder 1 is pressed. Is slidably contacted with the outer peripheral surface of the.

When cleaning the impression cylinder 1, the impression cylinder 1 is first set to a low-speed rotation state, and the cleaning liquid 16 supplied through the cleaning liquid supply pipe 13 is supplied from the cleaning liquid injection nozzle 14 to the outer peripheral surface (surface) of the impression cylinder 1. Then, the non-woven fabric 3 is pressed and moved toward the impression cylinder 1 via the sponge 32 by setting the air cylinders 7a and 7b in the extended state, and pressed against the outer peripheral surface of the impression cylinder 1. And the wiping action of the nonwoven fabric 3 by sliding movement of the nonwoven fabric 3 under this condition.
Is cleaned (wiped). At this time, the motor 4
Is operated intermittently. In response, the nonwoven fabric 3 is intermittently fed from the nonwoven fabric supply roller 28, and after being wiped of dirt on the outer peripheral surface of the impression cylinder 1, is wound up by the winding roller 29 and collected.

The cleaning device illustrated in FIG. 7 has an opening 15 at a position facing a roller (printing cylinder) 1 'to be cleaned.
a doctor blade 21 which is arranged side by side along the axial direction of the roller 1 'to be cleaned and which is pivotally supported about a support shaft 38, and which corresponds to the doctor blade 21. A pair of pipes (a cleaning liquid 16) having a cleaning brush 33 attached to the cleaning liquid container 15 as described above and a cleaning liquid injection port 34 facing the cleaning brush 33.
Supply pipes 35a and 35b, and the cleaning liquid container 15
A drain drive pipe 17 provided at the lower end of the doctor blade 21, a swing drive mechanism of the doctor blade 21, a swing range variable mechanism of the doctor blade 21, and the like. Thus, in this cleaning apparatus, the scraping portion at the distal end of the doctor blade 21 is attached to the roller 1 'while the distal end of the doctor blade 21 is directed downstream in the rotation direction of the roller 1' to be cleaned. It is possible to selectively perform a scrub operation of making contact with the outer peripheral surface and a wiping operation of swinging the doctor blade 21 in contact with the tip of the wiping brush 33 in the cleaning liquid container 15 (particularly). No. 55-55871).

[0008]

However, in the conventional cleaning apparatus shown in FIG. 6, (1) since the nonwoven fabric 3 is merely rubbed against the outer peripheral surface (surface) of the impression cylinder 1, it is dried. The cleaning effect on ink and the like is low, and many manual wiping operations are required after machine cleaning. (2) Since the nonwoven fabric 3 contaminated by washing the impression cylinder 1 is collected after being collected by the winding roller 29 and discarded, that is, disposable, the running cost is increased. There were some problems.

Further, in the conventional cleaning apparatus shown in FIG. 7, (1) since the scraping portion at the tip of the doctor blade 21 is arranged downstream of the roller 1 'to be cleaned in the rotation direction. In removing the dirt (ink or paper dust) on the outer peripheral surface of the roller 1 ', the dirt acts on the outer peripheral surface of the roller' so as to be pressed (rubbed), so that the peeling effect is small. (2) Since it is necessary to provide a mechanism for changing the swing range of the doctor blade 21, the structure is complicated. (3) The cleaning effect is low, and many manual wiping operations are required after machine cleaning. There were some problems.

The present invention has been made in view of such various problems, and an object of the present invention is to greatly improve the effect of removing dirt such as ink and paper dust attached to the outer peripheral surface of a printing cylinder. The present invention provides a printing cylinder cleaning apparatus capable of reducing manual wiping work after machine cleaning, and having a simple structure and an inexpensive configuration, and capable of reducing running costs. is there.

[0011]

According to the present invention, there is provided a cleaning apparatus for cleaning an outer peripheral surface of a printing cylinder, the cleaning apparatus comprising: a plurality of cleaning devices arranged along an axial direction of the printing cylinder; A cleaning liquid injection nozzle, a cleaning liquid supply pipe that supplies a cleaning liquid to the cleaning liquid injection nozzle, a blade that is arranged along the axial direction of the printing cylinder, and a tip of which is in contact with an outer peripheral surface of the printing cylinder; Vibration applying means for vibrating the tip of the blade in a direction of coming into contact with and separating from the outer peripheral surface of the printing cylinder are provided.

In the present invention, in addition to the vibration applying means for causing the blade to vibrate in a direction of coming into contact with and separating from the outer peripheral surface of the printing cylinder, a vibration applying means for vibrating the blade in an axial direction of the printing cylinder. Means are provided, and both of these vibration applying means or at least one of these vibration applying means are operated.

In the present invention, an ultrasonic vibrator is used as the vibration applying means.

Further, in the present invention, a plurality of rollers for guiding the endless cloth, wherein the cloth is interposed between the blade and the printing cylinder and the endless cloth is formed, and the plurality of rollers And a rotation driving means for rotationally driving the cloth, and a cloth cleaning device is provided upstream of the blade in the running direction of the endless cloth.

Further, in the present invention, the scraping portion at the tip of the blade is selectively rocked at two positions: a position where the blade is pressed against the outer peripheral surface of the printing cylinder and a position away from the outer peripheral surface of the printing cylinder. And a cleaning means for cleaning the scraping portion of the blade when the blade is swung to a position away from the outer peripheral surface of the printing cylinder.

Further, in the present invention, the scraping portion at the tip of the blade is brought into pressure contact with the outer peripheral surface of the printing cylinder toward the upstream side in the rotation direction of the printing cylinder.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In addition, these FIGS.
In FIG. 5, the same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals, and redundant description will be omitted.

FIGS. 1 to 3 show a printing cylinder cleaning apparatus according to a first embodiment of the present invention. The cleaning apparatus is provided along the axial direction of an impression cylinder (print cylinder) 1. A plurality of cleaning liquid injection nozzles 14, a cleaning liquid supply pipe 13 for supplying a cleaning liquid 16 to the cleaning liquid injection nozzle 14, The apparatus includes a blade 6 to be contacted, and a pair of ultrasonic vibrators (vibration applying means) 8a and 8b for vibrating the blade 6 in a direction of coming into contact with and separating from the outer peripheral surface of the impression cylinder 1. In the first embodiment, a plurality of sets of rollers 2a to 2c, a motor 4 for rotating and driving one of the sets of rollers 2a, an endless path passing through a plurality of sets of rollers 2a to 2c and a blade 6 are provided. A non-woven fabric driving mechanism 45 is provided which includes an endless non-woven fabric 3 stretched along the non-woven fabric and a non-woven fabric cleaning device 5 for cleaning the non-woven fabric 3.

The above-described nonwoven fabric drive mechanism 45 will be described in further detail below. A plurality of sets of rollers 2a to 2c are juxtaposed along the axial direction of the impression cylinder 1, and an endless nonwoven fabric 3 having a width corresponding to the roller length of the impression cylinder 1.
Is wound around these rollers 2a to 2c. Then, one set of these rollers 2a to 2c, for example, one set of rollers 2a is configured to be rotationally driven by a motor 4, and the nonwoven fabric 3 is rotated by intermittently or continuously rotating the rollers 2a. The vehicle travels along a predetermined endless route. In addition, the nonwoven fabric cleaning device 5 is disposed at a predetermined position of the endless path in order to clean dirt such as ink and paper powder attached to the outer peripheral surface of the nonwoven fabric 3 while the nonwoven fabric 3 is running.
As shown in FIG. 3, a pair of cleaning rollers (nipping rollers)
And a liquid jet nozzle 60 for jetting a cleaning liquid to one of the cleaning rollers 50.
In addition, the nonwoven fabric cleaning device 5 is disposed upstream of the disposition position of the blade 6 in the running direction of the nonwoven fabric 3.

On the other hand, the above-mentioned blade 6 is a member for scraping off dirt such as ink and paper powder adhering to the outer peripheral surface of the impression cylinder 1 and is disposed at an appropriate position in the width direction of the nonwoven fabric 3. The pair of cylinders 7a, 7b (contact / separation mechanism) are configured to be brought into contact with / separated from the outer peripheral surface of the impression cylinder 1 in accordance with the expansion / contraction operation. Specifically, these cylinders 7a and 7b are fixed to a support member 9 spanned between the frames 40a and 40 as shown in FIG. 2, while the blade 6 is interposed between elastic members 10 as shown in FIG. Or slidably attached to the operating rod portion 47 of the cylinders 7a and 7b. Thus, as the operating rod portions 47 of the pair of cylinders 7a and 7b are extended in synchronization with each other, the blade 6
Is raised and brought into contact (pressing contact) with the outer peripheral surface of the impression cylinder 1 via the nonwoven fabric 3. Therefore,
The nonwoven fabric 3 is interposed between the outer peripheral surface of the impression cylinder 1 and the blade 6 in a sandwiched state, and under this state, the nonwoven fabric 3 is circulated along an endless path.

The above-mentioned pair of cylinders 7a, 7b
Is extended and retracted based on an electric signal from an encoder (not shown) connected to the impression cylinder 1, and protrudes from the outer peripheral surface of the impression cylinder 1 in a mode in which the blade 6 contacts the outer peripheral surface of the impression cylinder 1. In order to prevent the claw 18 for gripping the paper from colliding with the blade 6, when the claw 18 passes through the place where the blade 6 is disposed, the blade 6 is retracted to a retracted position, that is, a position away from the outer peripheral surface of the impression cylinder 1. The contraction control is performed to move to. In FIG. 1, reference numeral 19 denotes a claw seat corresponding to the claw 18.

In the longitudinal direction of the blade 6 along the axial direction of the impression cylinder 1, for example, a pair of ultrasonic vibrators 8a and 8b are arranged corresponding to each other as shown in FIG. , 8b are fixed to the support member 9.
Thus, the blade 6 is vibrated in the direction in which the blade 6 comes into contact with or separates from the outer peripheral surface of the impression cylinder 1, that is, in the diameter direction of the impression cylinder 1 in response to the operation of the pair of ultrasonic transducers 8 a and 8 b. ing. As shown in FIG. 2, the ultrasonic vibrator 12 may be attached to one end of the blade 6 in order to apply vibration to the blade 6 in the longitudinal direction.

The cleaning liquid supply pipe 13 is connected to the impression cylinder 1.
And a tubular member disposed downstream of the blade 6 in the driving direction of the nonwoven fabric 3 in the driving direction of the nonwoven fabric 3, and the peripheral surface of the cleaning liquid supply pipe 13 facing the impression cylinder 1. The portion is provided with a plurality of liquid ejecting nozzles 14 at a plurality of locations in the longitudinal direction. Thus, the cleaning liquid 16 supplied from the cleaning liquid supply pipe 13 is
Mist is sprayed toward the outer peripheral surface of the impression cylinder 1 in the form of a mist.

In addition, below the non-woven fabric 3 circulating,
Cleaning liquid container 1 extending in an elongated shape along the longitudinal direction of impression cylinder 1
5 are provided. The cleaning liquid 16 (cleaning waste liquid) collected in the cleaning liquid container 15 is discharged to the outside through a discharge pipe 17 or filtered through a filter, a pump, or the like, fed back to the cleaning liquid supply pipe 13, and reused. (Not shown).

Next, the operation procedure and operation of the cleaning apparatus having such a configuration will be described below. In cleaning the outer peripheral surface of the impression cylinder 1, first, the impression cylinder 1 is set to a low-speed rotation state. Under this state, the mist-like cleaning liquid 16 is sequentially passed through the cleaning liquid supply pipe 13 and the liquid injection nozzle 14. Is the outer peripheral surface of the impression cylinder 1 (the blade 6 in the rotation direction of the printing cylinder 1).
The fuel is injected toward the outer peripheral surface portion (upstream side). Subsequently, the air cylinders 7a and 7b are extended at an appropriate timing to avoid the claw 18 of the impression cylinder 1, and the tip of the blade 6 is pressed against the outer peripheral surface of the impression cylinder 1 via the nonwoven fabric 3 in response thereto.

On the other hand, the driving roller 2a is driven to rotate by the operation of the motor 4, and accordingly, the nonwoven fabric 3 is intermittently or continuously circulated at a low speed along a predetermined endless path. Accordingly, stains such as ink and paper dust adhered to the surface of the nonwoven fabric 3 are removed when passing through the nonwoven fabric cleaning device 5, and the nonwoven fabric 3 after the cleaning is removed from the impression cylinder 1 and the blade 6.
Will be transferred to In the nonwoven fabric cleaning device 5, the cleaning liquid is jetted from the liquid jet nozzle 60 to the nonwoven fabric 3 to wet the nonwoven fabric 3, and then, by the pinching force when passing between the pair of cleaning rollers 50, 50. Dirt on the nonwoven fabric 3 is squeezed out.

In synchronization with this, the ultrasonic transducers 8a, 8a,
8b and 12 are set to the operating state, whereby the blade 6 is given vibration in the direction of expansion and contraction of the air cylinders 7a and 7b, in other words, in the direction of coming and going from the outer peripheral surface of the impression cylinder 1 and its longitudinal direction. A vibration in a direction (a direction along the axial direction of the impression cylinder 1) is applied. The ultrasonic transducers 8a, 8
By operating only the ultrasonic vibrators 8a and 8b without operating all of the members b and 12 at the same time, only the vibration in the direction of coming and coming from the outer peripheral surface of the impression cylinder 1 (the plate width direction on the blade 6) is applied. Alternatively, only the ultrasonic vibrator 12 may be operated to apply only vibration in the longitudinal direction of the blade. Then, under such a state that the ultrasonic vibration is applied to the blade 6, the blade 6
And the non-woven fabric 3 is circulated between the impression cylinder 1 and the blade 6 and slidably contacts the outer peripheral surface of the impression cylinder 1. As a result, dirt such as ink and paper powder attached to the outer peripheral surface of the impression cylinder 1 is rubbed off by the nonwoven fabric 3 and cleaned.

According to the cleaning apparatus of the first embodiment as described above, the blade 6 is vibrated by the ultrasonic vibrators 8a, 8b and 12 to move the nonwoven fabric 3 in contact with the outer peripheral surface of the impression cylinder 1 and the running direction. Since the nonwoven fabric 3 circulated along the endless path is used to wipe the outer peripheral surface of the impression cylinder 1 in a state where vibration is applied to both (or at least one of them) in the width direction. The following operation and effect can be obtained. (1) By applying ultrasonic vibration to the blade 6, it is possible to greatly improve the effect of removing ink and paper dust, and it is possible to omit manual work after machine cleaning, and to save labor in cleaning work. be able to. (2) Since the nonwoven fabric 3 is washed and reused by the nonwoven fabric washing device 5 while being circulated along the endless route without being disposable, the running cost can be reduced. (3) Further, the cleaning liquid 16 can be configured to be reused, and by performing such reuse, the running cost can be reduced in the same manner as described above.

As a second embodiment different from the above-described first embodiment, the nonwoven fabric driving mechanism 45 shown in FIG. 1, that is, the nonwoven fabric 3, the motor 4, the nonwoven fabric cleaning device 5, and the rollers 2a to 2c are provided. The removed cleaning device may be mentioned (not shown). In this case, vibration is applied by the ultrasonic vibrators 8a, 8b, and 12 in a state where the blade 6 is directly and appropriately pressed into contact with the outer peripheral surface of the impression cylinder 1 without passing through the nonwoven fabric 3. Becomes

Even in the case of such a configuration, the first
As in the case of the embodiment, it is possible to greatly improve the effect of removing ink and paper dust, and it is possible to save labor by eliminating manual work after machine cleaning, and to reuse the cleaning liquid 16. By performing reuse, the running cost can be reduced. Further, in addition to the above-described functions and effects, according to the cleaning device of the second embodiment, the nonwoven fabric 3 and the roller 2a associated therewith are provided.
2c and the nonwoven fabric cleaning device 5 are unnecessary, so that the additional cost and effect can be obtained, the overall size of the cleaning device can be reduced, and the cleaning device can be made more compact. Can be.

FIGS. 4 and 5 show a printing cylinder cleaning apparatus according to a third embodiment of the present invention. 4 and 5, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals.

As shown in FIG. 4, the cleaning apparatus according to the third embodiment is a longitudinal cleaning liquid container located below the impression cylinder 1 and supported substantially parallel to the axial direction of the impression cylinder 1. 1
5 and the cleaning liquid container 1 above the cleaning liquid container 15.
5, a cleaning brush 20 provided in the longitudinal direction (a direction along the axial direction of the impression cylinder 1), and a cleaning brush 20 arranged along the impression cylinder 1 and an outer peripheral surface of the impression cylinder 1 and the cleaning brush 20. A thin blade-shaped doctor blade 21 pivotally supported so as to be able to contact with and separate from both and to be selectively engaged with any one of them, and to scrape the tip of this doctor blade 21 A plurality of cleaning liquid jet nozzles 14 for jetting the cleaning liquid 16 to the outer peripheral surface portion of the impression cylinder 1 and the cleaning brush 20 to which the removing portion (blade tip) is pressed and contacted, and the cleaning liquid jet nozzles 14 The cleaning liquid supply pipe 13 for supplying the cleaning liquid 16 is provided.

The ultrasonic vibrators 8a and 8 vibrate the scraping portion at the tip of the doctor blade 21 in the plate thickness direction or the plate width direction (direction of coming and coming from the outer peripheral surface of the impression cylinder 1).
b is provided as a means for applying vibration to the blade 6, and an ultrasonic vibrator 12 for vibrating in the longitudinal direction of the doctor blade 21 (along the axial direction of the impression cylinder 1) is provided as blade vibration means. These ultrasonic transducers 8
a, 8b, and 12 are individually mounted and configured to be independently operable. In addition, the ultrasonic vibrator 8
a, 8b or only the ultrasonic vibrator 12 may be mounted and operated alone, or all of the ultrasonic vibrators 8a, 8b, 12 may be mounted and operated in a synchronized state. Is also good.

Further, the configuration of the main part of the cleaning apparatus according to the third embodiment will be described in detail as follows. 4 and 5, reference numeral 37 denotes a blade shaft serving as a rotation center of the doctor blade 21, and reference numeral 11 denotes a swinging air cylinder or air motor connected to one end of the doctor blade shaft 37 via a gear 36 or the like. Mechanism. When the oscillating mechanism 11 is rotationally driven, the rotational driving force is transmitted to the gear 36.
The doctor blade 21 is rotated together with the doctor blade shaft 37 through the shaft and the doctor blade 21 is rotated together with the doctor blade shaft 37, so that the scraping portion at the tip of the doctor blade 21 is pressed against the outer peripheral surface of the impression cylinder 1 and the position for cleaning. It is configured to be selectively oscillated at two positions where it is engaged with the brush 20.

As shown in FIG. 5, the ultrasonic vibrator 1
2 is a mounting bracket 26 to which the doctor blade 21 is mounted.
The doctor blade 21 is vibrated in the axial direction of the impression cylinder 1 by the vibration generated by the ultrasonic vibrator 12. On the other hand, the ultrasonic vibrators 8a and 8b are connected to the doctor blade 2 via the mounting bracket 26.
The direction in which the scraping portion at the tip of the doctor blade 21 comes into contact with or separates from the outer peripheral surface of the impression cylinder 1 by the vibration generated by the ultrasonic vibrator 12 (the thickness of the doctor blade 21). Direction).

As shown in FIG. 4, the doctor blade 21 is attached to a projecting portion of an arm 25 fixed to a plurality of positions of a doctor blade shaft 37 via a mounting bracket 26 and a buffer member 27 such as rubber. In addition, by interposing the buffer member 27, the vibration of the doctor blade 21 is not transmitted to the doctor blade shaft 37, so that the member on the fixed side is not adversely affected. The doctor blade shaft 3
The swing mechanism 11 composed of a rotary air cylinder or an air motor connected via a gear 36 at the shaft end of the shaft 7 has an electric signal from an encoder (not shown) connected to the impression cylinder 1 or a cam (not shown). ) Is appropriately controlled by the operation signal according to the above, and when the doctor blade 21 is pressed against the outer peripheral surface of the impression cylinder 1, the claw 1 for holding the paper protruding from the outer peripheral surface of the impression cylinder 1.
The collision between the doctor blade 8 and the doctor blade 21 is avoided. In the present embodiment, the scraping portion at the tip of the doctor blade 21 is, as shown in FIG.
The pressure roller 1 is installed so as to be pressed against the outer peripheral surface of the impression cylinder 1 while being directed to the upstream side in the rotation direction.

The cleaning liquid supply pipe 13 for supplying the cleaning liquid 16 is configured to be rotatable in the circumferential direction of the pipe by a predetermined angle together with the cleaning liquid injection nozzle 14, and is installed on the outer peripheral surface of the cleaning liquid supply pipe 13. The cleaning liquid spray nozzle 14 is selectively opposed to the outer peripheral surface portion of the impression cylinder 1 or the cleaning brush 20 with which the doctor blade 21 engages. As another example, two sets of cleaning and cleaning liquid jet nozzles 14 are provided side by side on the outer peripheral surface of the cleaning liquid supply pipe 13, one set of which is opposed to the outer peripheral surface side of the impression cylinder 1,
The set may be set to face the cleaning brush 20 side.

On the other hand, the cleaning liquid 16 collected in the cleaning liquid container 15 is discharged to the outside through a discharge pipe 17, or is filtered and vortexed through a filter pump or the like, and is filtered.
3 and is provided for reuse. (Not shown)

Further, at the shaft end of the doctor blade shaft 37, as shown in FIG. 6, an axial swing drive means 22 is provided via a joint 23, and the doctor blade shaft 37 is provided by the axial swing drive means 22. Is swung in the axial direction so that the scraping portion at the tip of the doctor blade 21 is swung in the axial direction of the impression cylinder 1 at a position near the outer peripheral surface of the impression cylinder 1. In addition, as the axial swing drive means 22, an air cylinder, a hydraulic cylinder, a mechanical swing device, or the like is used.

Next, the operation procedure and operation of the cleaning device having such a configuration will be described below. In cleaning the outer peripheral surface of the impression cylinder 1, first, the impression cylinder 1 is set to a low-speed rotation state. Under this state, the mist-like cleaning liquid 16 is sequentially passed through the cleaning liquid supply pipe 13 and the liquid injection nozzle 14. Is sprayed toward the outer peripheral surface of the impression cylinder 1. Subsequently, the swing mechanism 1
1, the doctor blade shaft 37 is rotated, and the scraping portion at the tip of the doctor blade 21 is brought into press contact with the outer peripheral surface of the impression cylinder 1 to clean the outer peripheral surface of the impression cylinder 1.

The ultrasonic vibrators 8a, 8b, and 12 are set in an operating state in synchronization with such a cleaning operation. In response to this, the doctor blade 21 is vibrated in the plate thickness direction or the plate width direction. Ultrasonic vibration is applied in the longitudinal direction of the doctor blade 21. The ultrasonic transducers 8a and 8b
Alternatively, only the ultrasonic vibrator 12 may be operated to vibrate the doctor blade 21 in the thickness direction or the longitudinal direction.

After cleaning of the impression cylinder 1, the doctor blade shaft 37 is operated by the operation of the axial swing drive means (cylinder or the like) 22.
Is rotated, and the scraping portion at the tip of the doctor blade 21 contacts the cleaning brush 20 side. At this time, the cleaning liquid spray nozzle 14 is opposed to the same position to spray the cleaning liquid 16 in the form of a mist, and the ultrasonic vibrators 8a, 8b, 12
Is activated, whereby ultrasonic vibrations acting on the doctor blade 21 in the plate thickness direction and the blade longitudinal direction are applied to the doctor blade 21 in the same manner as when the impression cylinder 1 is washed. Therefore, the outer peripheral surface of the impression cylinder 1 is cleaned and the doctor blade 21 itself is also cleaned.

Incidentally, the axial swing drive means 22 connected to the shaft end of the doctor blade shaft 37 is operated during the cleaning period, and even when the doctor blade 21 is in contact with the outer peripheral surface of the impression cylinder 1, Even when the cleaning brush 20 is in contact with the cleaning brush 20, the cleaning brush 20 is swung in the axial direction.

According to the cleaning apparatus of the third embodiment as described above, the outer peripheral surface of the impression cylinder 1 and the scraping portion of the doctor blade 21 are cleaned while ultrasonically oscillating the doctor blade 21. Therefore, the following operation and effect can be obtained. (1) Soil such as ink and paper dust can be removed from both the outer peripheral surface of the impression cylinder 1 and the scraping portion of the doctor blade 21 by ultrasonic vibration, and the effect of removing stain can be greatly improved. It becomes possible. (2) Since the scraping portion of the doctor blade 21 is pressed and contacted toward the upstream side in the rotation direction of the impression cylinder 1, it is possible to increase the peeling action for dirt such as ink and paper dust. (3) Due to the functions and effects described in the above items (1) and (2), it is possible to omit the manual operation after the machine cleaning, and it is possible to save the labor of the cleaning operation. (4) Since dirt such as ink and paper dust adhered to the scraping portion of the blade 6 is removed along with scraping from the outer peripheral surface of the impression cylinder 1, the scraping portion of the clean blade 6 is removed. As a result, the outer peripheral surface of the impression cylinder 1 is cleaned, so that the effect of removing dirt from the outer peripheral surface of the impression cylinder 1 can be further improved. (5) Since the scraping portion at the tip of the blade 6 is brought into pressure contact with the outer peripheral surface of the impression cylinder 1 toward the upstream side in the rotation direction of the impression cylinder 1, it is possible to prevent contamination of ink, paper dust, and the like. The peeling action, that is, the effect of removing dirt from the outer peripheral surface of the impression cylinder 1 can be increased. (6) The cleaning liquid 16 can be reused, and the running cost can be reduced by reusing the cleaning liquid 16. (7) Compared with the above-described first and second embodiments in which a cloth is used, the structure can be simplified, maintenance can be easily performed, initial costs can be reduced, and running costs can be reduced. Can be inexpensive.

Although the embodiments of the present invention have been described, the present invention is not limited to these embodiments, and various modifications and changes can be made based on the technical idea of the present invention. For example, in any of the above-described embodiments, the ultrasonic vibrators 8a, 8b, 12
, But the ultrasonic transducers 8a, 8b, 12
It is also possible to use other mechanical or electric vibration imparting means (vibration device). Furthermore, although the nonwoven fabric 3 is used in the first embodiment described above, a woven fabric may be used. The present invention is also applicable to a cleaning device for cleaning a printing cylinder other than the impression cylinder 1.

[0046]

According to a first aspect of the present invention, there is provided a cleaning apparatus for cleaning an outer peripheral surface of a printing cylinder, wherein a plurality of cleaning liquid jet nozzles disposed along an axial direction of the printing cylinder; A cleaning liquid supply pipe for supplying a cleaning liquid to the injection nozzle,
A blade arranged side by side along the axial direction of the printing cylinder and having a leading end portion abutting on the outer peripheral surface of the printing cylinder, and a direction in which the leading end portion of the blade comes into contact with and separates from the outer peripheral surface of the printing cylinder. According to the present invention, ultrasonic vibration is applied to the blade by the vibration applying means, thereby greatly improving the effect of removing ink and paper dust. This makes it possible to effectively clean dirt such as ink and paper powder attached to the outer peripheral surface of the printing cylinder. Therefore, the manual cleaning operation after the mechanical cleaning can be omitted, and the labor of the cleaning operation can be reduced. Furthermore, since the structure of the cleaning device is simple, maintenance is easy, initial costs can be reduced, and running costs can be reduced.

According to a second aspect of the present invention, in addition to the vibration applying means for vibrating the blade in a direction in which the blade comes into contact with and separate from the outer peripheral surface of the printing cylinder, the blade is provided with a shaft of the printing cylinder. The vibration imparting means for vibrating in the direction is provided, and both of these vibration imparting means or at least one of these vibration imparting means are operated.According to the present invention, the vibration imparting effect as described above is obtained. As a result, dirt such as ink and paper dust adhered to the outer peripheral surface of the printing cylinder can be reliably removed, and the wiping operation can be performed satisfactorily only by mechanical means without requiring any manual operation.

Further, according to the third aspect of the present invention, since the ultrasonic vibrator is used as the vibration applying means, according to the present invention, the above-described effects can be obtained. The cleaning device for the printing cylinder can be configured simply and inexpensively.

According to a fourth aspect of the present invention, a plurality of rollers for guiding the endless cloth by interposing a cloth between the blade and the printing cylinder, forming the cloth endless, And a rotation driving means for rotationally driving the plurality of rollers, respectively, and a cloth cleaning device is provided upstream of the blade in the running direction of the endless cloth. According to the present invention, the cloth is cleaned by the cloth cleaning device while the cloth is circulating along the endless path, so that the cleaned cloth is used to effectively wipe off the dirt on the outer peripheral surface of the printing cylinder. be able to. In addition, the running cost can be reduced because the non-woven fabric is cleaned and reused by the non-woven fabric cleaning device while being circulated along the endless route without being disposable.

According to a fifth aspect of the present invention, a scraping portion (blade-shaped tip) of the tip of the blade is pressed from the position where the scraping portion is pressed against the outer peripheral surface of the printing cylinder and the outer peripheral surface of the printing cylinder. Means for selectively oscillating at two separate positions, and a cleaning means for cleaning the scraping portion of the blade when the blade is oscillated to a position away from the outer peripheral surface of the printing cylinder (cleaning means) According to the present invention, the cleaning function of the cleaning means causes the ink adhered to the scraping portion of the blade to be scraped off from the outer peripheral surface of the printing cylinder. Dirt such as paper dust can be removed. Therefore, the outer peripheral surface of the printing cylinder is cleaned at the scraping portion of the blade from which the dirt has been surely removed, and the effect of removing dirt from the outer peripheral surface of the printing cylinder can be further improved.

According to a sixth aspect of the present invention, the scraping portion at the tip of the blade is brought into pressure contact with the outer peripheral surface of the printing cylinder toward the upstream side in the rotation direction of the printing cylinder. Therefore, with such an arrangement of the blades, it is possible to increase the effect of removing dirt such as ink and paper dust, that is, the effect of removing dirt from the outer peripheral surface of the printing cylinder.

Furthermore, the cleaning apparatus for a printing cylinder according to the present invention can be configured to reuse the cleaning liquid. By performing such reuse, the running cost can be reduced. it can.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a configuration of a printing cylinder cleaning device according to a first embodiment of the present invention.

FIG. 2 is a front view as viewed from a direction indicated by an arrow X in FIG.

FIG. 3 is a side view showing the configuration of the nonwoven fabric cleaning apparatus.

FIG. 4 is a side view showing a configuration of a printing cylinder cleaning device according to a third embodiment of the present invention.

FIG. 5 is a front view as viewed from a direction indicated by an arrow Y in FIG.

FIG. 6 is a side view showing a configuration of a conventional printing cylinder cleaning device.

FIG. 7 is a side view showing the configuration of another conventional printing cylinder cleaning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impression cylinder (printing cylinder) 2a-2c Roller 3 Nonwoven fabric 5 Nonwoven fabric cleaning device 6 Blade 7a, 7b Air cylinder (contact / separation mechanism) 8a, 8b Ultrasonic vibrator 11 Oscillating mechanism 12 Ultrasonic vibrator 13 Cleaning liquid supply device 14 Cleaning liquid spray nozzle 15 Cleaning liquid container 16 Cleaning liquid 20 Cleaning brush 21 Doctor blade 22 Axial swing drive means 25a, 25b Arm 37 Doctor blade shaft 45 Non-woven fabric drive mechanism

Claims (6)

[Claims] 1. A cleaning apparatus for cleaning an outer peripheral surface of a printing cylinder, comprising: a plurality of cleaning liquid injection nozzles disposed along an axial direction of the printing cylinder; and a cleaning liquid supply pipe for supplying a cleaning liquid to the cleaning liquid injection nozzle. A blade arranged in parallel along the axial direction of the printing cylinder and having a leading end abutting against the outer peripheral surface of the printing cylinder; and bringing the leading end of the blade into contact with and separating from the outer peripheral surface of the printing cylinder. And a vibration applying means for vibrating in a direction. 2. A vibration applying means for vibrating the blade in an axial direction of the printing cylinder, in addition to the vibration applying means for vibrating the blade in a direction approaching and separating from an outer peripheral surface of the printing cylinder, 2. The printing cylinder cleaning apparatus according to claim 1, wherein both of these vibration applying means or at least one of these vibration applying means are operated. 3. The printing cylinder cleaning apparatus according to claim 1, wherein an ultrasonic vibrator is used as the vibration applying means. 4. A cloth is interposed between the blade and the printing cylinder, the cloth is formed endless, a plurality of rollers for guiding the endless cloth, and the plurality of rollers are rotationally driven. And a rotation driving means for each of the cleaning means, and a cloth cleaning device is provided upstream of the blade in the running direction of the endless cloth. Printing cylinder cleaning equipment. 5. A means for selectively oscillating a scraping portion at the tip of the blade at two positions: a position where the scraping portion is pressed against the outer peripheral surface of the printing cylinder and a position away from the outer peripheral surface of the printing cylinder. The cleaning device according to any one of claims 1 to 3, further comprising cleaning means for cleaning a scraping portion of the blade when the blade is swung to a position away from an outer peripheral surface of the printing cylinder. A cleaning device for a printing cylinder according to the above item. 6. The printing apparatus according to claim 5, wherein the scraping portion at the tip of the blade is pressed against the outer peripheral surface of the printing cylinder toward the upstream side in the rotation direction of the printing cylinder.
3. A cleaning device for a printing cylinder according to claim 1.