WO2010147143A1

WO2010147143A1 - Cylinder cleaning device

Info

Publication number: WO2010147143A1
Application number: PCT/JP2010/060202
Authority: WO
Inventors: 和弘吉田; 友裕今村; 康男金山; 一英今福
Original assignee: 日本ボールドウィン株式会社
Priority date: 2009-06-17
Filing date: 2010-06-16
Publication date: 2010-12-23
Also published as: JP2012166342A

Abstract

In order to clean two or more cylinders by one cylinder cleaning device, two or more cleaning pads are provided, and the respective cleaning pads are independently operated so that the cleaning cloth is effectively used and waste is reduced. A cleaning cloth (5) is unreeled from a cleaning cloth supply means (6), passes through a first cleaning pad (3) which cleans a first cylinder (1), subsequently passes through a second cleaning pad (4) which cleans a second cylinder (2), and thereafter, is wound by a cleaning cloth winding means (7). A control means (12) retains the cleaning cloth usage state corresponding to the first cleaning pad, and controls a first pad driving means (9), a second pad driving means (10), and a cleaning cloth driving means (11), so that a portion of the cleaning cloth which has been used for the first cleaning pad is not used for the second cleaning pad.

Description

Cylinder cleaning device

The present invention relates to a cylinder cleaning device that cleans the surface of a blanket cylinder or the like of a printing press, and more particularly to a cylinder cleaning device that wipes the outer peripheral surface of a cylinder with a cleaning cloth.

A color offset printing machine used for newspaper printing or the like includes a number of cylinders such as a plate cylinder and a blanket cylinder for each color. The cylinder of a printing machine sometimes needs to perform so-called cleaning that removes excess ink and paper dust adhering to the outer peripheral surface of the cylinder. Cylinder cleaning operations are incorporated as part of the printing plant process. The cleaning of the cylinder is performed automatically by remote operation by a cylinder cleaning device mounted adjacent to the cylinder as a part of the components of the printing press.

There are several types of cylinder cleaning devices depending on the operating principle. The most popular type of cylinder cleaning apparatus is a type in which the surface of the cylinder is wiped with a cleaning cloth. A typical configuration of a cylinder cleaning device using a cleaning cloth is described in Patent Document 1 and Patent Document 2. In the cylinder cleaning apparatus using the cleaning cloth described in those documents, the cleaning cloth containing the cleaning liquid is pressed against the outer periphery of the rotating cylinder with an elastic pad. Then, excess ink, paper dust and the like on the surface of the cylinder are softened by the cleaning liquid and adhere to the cleaning cloth.

On the other hand, printing presses continue to be improved to enable higher speed and higher quality printing. Printing presses are becoming smaller with improved performance. A miniaturized printing machine has little space for installing a cylinder cleaning device. For this purpose, cylinder cleaning apparatuses such as those described in Patent Document 1, Patent Document 2, and Patent Document 3 have been developed. The cleaning device described here cleans two cylinders with one cylinder cleaning device. Therefore, the space of the cylinder cleaning device can be saved as compared with the case where one cylinder cleaning device is attached to one cylinder.

The cylinder cleaning apparatus described in Patent Document 1, Patent Document 2, and Patent Document 3 includes two cleaning pads for cleaning two cylinders simultaneously. The cylinder cleaning apparatus described in Patent Document 1 can be equipped with two or three cleaning pads in one cylinder cleaning apparatus. In the cleaning apparatus described in Patent Document 1, when two cleaning pads are mounted, the two cleaning pads always operate simultaneously. That is, it is not possible to select and operate only one of the two cleaning pads. However, in reality, there is a demand for cleaning only one of the two cylinders. This is because, in a printing press, even if two cylinders are arranged, the stains are not uniform. Furthermore, one of the two cylinders may not be used depending on the printing process.

Patent Document 2 describes a cylinder cleaning apparatus in which two cleaning pads can operate independently. According to the cylinder cleaning apparatus described in Patent Document 2, only one of the preceding first cleaning pad and the subsequent second cleaning pad as viewed from the cleaning cloth can be operated independently. However, the cylinder cleaning apparatus described in Patent Document 2 has a disadvantage that the cleaning cloth is wasted depending on the execution sequence of the cleaning sequence. In order to prevent the cleaning cloth used in the preceding first cleaning pad as viewed from the cleaning cloth from being used again in the subsequent second cleaning pad, the cylinder cleaning apparatus described in Patent Document 2 is used once. The distance between the first cleaning pad and the second cleaning pad is longer than the length of the cleaning cloth used in this cleaning sequence. This ensures that the dirty cleaning cloth used on the preceding first cleaning pad is not used again on the second cleaning pad during the cleaning sequence. In the cylinder cleaning apparatus described in Patent Document 2, since the cleaning cloth is uniformly discarded every time the cleaning sequence is completed, the unused cleaning cloth corresponding to the cleaning pad that did not operate is also discarded. The

Patent Document 3 describes a cylinder cleaning device having two or three cleaning pads. Patent Document 3 describes how to feed the cleaning cloth. In the method of feeding the cleaning cloth described in Patent Document 3, the cleaning cloth is divided in steps, and odd or even divisions can be used so that the two cleaning pads do not overlap each other.

By the way, the waste of the cleaning cloth is equivalent to the problem of how to discard the unused portion of the cleaning cloth. When there are two cleaning pads in one cylinder cleaning device as described in Patent Document 1, if two cleaning pads are always used at the same time, there is no need to consider waste of cleaning cloth. However, when the two cleaning heads are selectively operable as in the cylinder cleaning device described in Patent Document 2, an unused portion is generated on the cleaning cloth.

EP1187721B1 EP1000740A1 EP0334173B1

The present invention is a cylinder cleaning apparatus having two or more cleaning pads for cleaning two or more cylinders with one cylinder cleaning apparatus, and each cleaning pad can be operated independently. A cylinder cleaning device that can be used is realized.
In addition, the present invention is a cylinder cleaning apparatus having two or more cleaning pads, and even when each cleaning pad is operated independently, the cleaning cloth is used effectively and waste is reduced. A cylinder cleaning device is realized.

The cylinder cleaning apparatus of the present invention includes a first cleaning pad for cleaning the first cylinder,
First pad driving means for bringing the first cleaning pad into a cleaning state or a non-cleaning state;
A second cleaning pad for cleaning the second cylinder; a second pad driving means for bringing the second cleaning pad into a cleaning state or a non-cleaning state; a cleaning cloth supply means for supplying a cleaning cloth;
Cleaning cloth winding means for winding the cleaning cloth, and feeding the cleaning cloth from the cleaning cloth supply means, first passing through the first cleaning pad, subsequently passing through the second cleaning pad, and then A cleaning cloth feeding means for feeding the cleaning cloth winding means, a cleaning cloth driving means for driving the cleaning cloth feeding means, the first pad driving means, the second pad driving means, and the cleaning cloth driving means. Control means for controlling, recognizing means for recognizing a used part of the cleaning cloth used in the first cleaning pad and an unused part of the cleaning cloth not used in the first cleaning pad; The cylinder cleaning apparatus is characterized in that the control means controls the unused portion to be used by the second cleaning pad based on the recognition result of the recognition means.

The present invention also includes the following inventions.
(1) In the case where the cleaning cloth of the used part of the first cleaning pad overlaps the cleaning operation area of the second cleaning pad, the control unit cleans the used part. Feed the cloth by air.
(2) The cleaning cloth is sent by step feeding, and the distance between the first cleaning pad and the second cleaning pad can be converted into the number of feeding steps of the cleaning cloth.
(3) A part of the cleaning cloth that has been used in the first cleaning pad is reused in the second cleaning head.
(4) The control means holds the winding length of the cleaning cloth wound around the cleaning cloth winding means, and corrects the number of steps of feeding the cleaning cloth according to the winding length of the cleaning cloth. To do.

The present invention is a single cylinder cleaning device that can clean two cylinders at the same time, a first cleaning pad for cleaning the first cylinder, and a second for cleaning the second cylinder. The cleaning pad can be operated independently. Therefore, for example, even if the printing machine is a printing machine that supports multicolor printing, when only one color printing is performed, the present invention can wash only one cylinder with one washing pad, which is wasteful. No need for cleaning. In addition, one cylinder cleaning device has two cleaning pads and recognizes the used and unused parts of the cleaning cloth, so that the unused part of the cleaning cloth is used as much as possible. Thus, the waste of the cleaning cloth can be reduced.

1 is an overall block diagram of the present invention. It is an arrangement plan of components. It is operation | movement explanatory drawing of a cloth feeding means. It is operation | movement explanatory drawing of the cloth feeding means in case a winding diameter is small. It is operation | movement explanatory drawing of the cloth feeding means in case a winding diameter is large. It is feed explanatory drawing of a cleaning cloth. It is explanatory drawing in the case of using a 1st cleaning pad and a 2nd cleaning pad. It is explanatory drawing in the case of using a 2nd cleaning pad. It is explanatory drawing in the case of using a 1st cleaning pad. It is explanatory drawing of step number correction | amendment.

FIG. 1 is a block diagram of an embodiment of the present invention. Reference numeral 1 is a first cylinder, and 2 is a second cylinder. 3 is a first cleaning pad for cleaning the

first cylinder

1, and 4 is a second cleaning pad for cleaning the second cylinder 2. Reference numeral 5 denotes a cleaning cloth. Reference numeral 6 denotes cleaning cloth supply means for supplying the cleaning cloth 5. Reference numeral 7 denotes a cleaning cloth winding means for winding the cleaning cloth 5. Reference numeral 8 denotes cleaning cloth feeding means. The cleaning cloth feeding means 8 feeds the cleaning cloth 5 from the cleaning cloth supply means 6, first passes through the first cleaning pad 3, subsequently passes through the second cleaning pad 4, and then passes to the cleaning cloth winding means 7. Send to. As the cleaning cloth 5, it is preferable to use a non-woven fabric. The cleaning cloth 5 may be impregnated with the cleaning liquid in advance from when it is attached to the cleaning cloth supply means 6. When the dry type is used for the cleaning cloth 5, the cleaning liquid is supplied to the cleaning cloth 5 from a nozzle (not shown) in the vicinity of the first cleaning pad 3 or the second cleaning pad 4. Or an additional impregnation with a deficient cleaning solution.

The cylinder cleaning apparatus shown in FIG. 1 presses the cleaning cloth 5 toward the surfaces of the first cylinder 1 and the second cylinder 2 by the first cleaning pad 3 and the second cleaning pad 4. Then, the dirt on the surfaces of the first cylinder 1 and the second cylinder 2 is transferred to the cleaning cloth 5.

Reference numeral 9 denotes a first pad driving means for setting the first cleaning pad 3 to a cleaning state or a non-cleaning state, and reference numeral 10 denotes a second pad driving for setting the second cleaning pad 4 to a cleaning state or a non-cleaning state. Means. Reference numeral 11 denotes cleaning cloth driving means for driving the cleaning cloth feeding means 8. A control unit 12 controls the first pad driving unit 9, the second pad driving unit 10, and the cleaning cloth driving unit 11.

FIG. 2 is an arrangement diagram of components of the cylinder cleaning device. If the 1st cylinder 1 and the 2nd cylinder 2 are the blanket cylinders of a multicolor rotary press, they will adjoin with a slight distance, and both rotate clockwise (CW). Reference numeral 14 denotes a base plate. Reference numeral 15 denotes a rail. Reference numeral 16 denotes a support roller. Although not shown, the rail 15 is fixed to the frame of the printing press main body that supports the

cylinders

1 and 2. The roller 16 is attached to the base plate 14. The base plate 14 is slidable along the rail 15 via the roller 16. Reference numeral 17 denotes an air solenoid. The fixed base 18 of the air solenoid 17 is attached to a frame of a printing press (not shown). A movable shaft 19 of the air solenoid 17 is connected to the base plate 14. As a result, the base plate 14 can be moved along the rail 15 by the air solenoid 17. The first cleaning pad 3 and the second cleaning pad 4 are attached to the base plate 14 so as to face the first cylinder 1 and the second cylinder 2. Therefore, when the air solenoid 17 is operated, the first cleaning pad 3 and the second cleaning pad 4 can move forward and backward with respect to the first cylinder 1 and the second cylinder 2.

The cleaning cloth supply means 6 is rotatably supported by the base plate 14. The cleaning cloth 5 is pulled out from the cleaning cloth supply means 6 and first passes through the first cleaning pad 3, then passes through the second cleaning pad, and reaches the winding means 7. The winding means 7 and the cleaning cloth feeding means 8 are integrally supported by the base plate 14.

The position of the base plate 14 shown in FIG. 2 is a position where the first cleaning head 3 and the second cleaning head 4 have advanced toward the first cylinder 1 and the second cylinder 2. Although not shown, since the first and

second cleaning pads

3 and 4 are separated from the first and

second cylinders

1 and 2 when the position of the base plate 14 is retracted along the rail 15, the cleaning cloth 5 Can be exchanged.

The first cleaning pad 3 and the second cleaning pad 4 are switched between two states, a cleaning state and a non-cleaning state. The first cleaning pad 3 is a combination of an elastic air pad 20 and a metal support bar 21. An air chamber 22 is formed between the air pad 20 and the support bar 21. In FIG. 2, for ease of explanation, the first cleaning pad 3 is shown in cross section, but actually the air chamber 22 is a closed space connected to a high-pressure air source (not shown) by a tube (not shown). is there. In FIG. 2, the first cleaning pad 3 is in a state where the air chamber is expanded and the air pad 20 is in contact with the first cylinder 1. This indicates that the first cleaning pad 3 is in a cleaning state.

On the other hand, the second cleaning pad 4 is similarly composed of an air pad 23 and a support bar 24 and includes an air chamber 25, but the air chamber 25 is contracted. Therefore, the air pad 23 is separated from the second cylinder 2. This indicates that the second cleaning pad 4 is in a non-cleaning state. The control of whether the air chamber 22 of the first cleaning pad 3 is expanded or contracted with high-pressure air is performed by the first pad driving means 9 shown in FIG. Control of whether the air chamber 25 of the second cleaning pad 4 is expanded or contracted is performed by the second pad driving means 10 shown in FIG. The first cleaning pad 3 and the second cleaning pad 4 only need to be able to shift individually to the cleaning state and the non-cleaning state. Therefore, the operation switching by the

air chambers

22 and 25 may not be performed. For example, the

cleaning pads

3 and 4 may be rotated around a fulcrum by an air solenoid provided individually to switch between a cleaning state and a non-cleaning state. Alternatively, the

cleaning pads

3 and 4 may be supported on the rail, and may move back and forth along the rail to switch between the cleaning state and the non-cleaning state.

3A is an operation explanatory view of the cloth feeding means 8, FIG. 3B is an operation explanatory view of the cloth feeding means 8 when the winding diameter of the winding means 7 is small, and FIG. 3C is a winding diameter of the winding means 7. It is operation | movement explanatory drawing of the cloth feeding means 8 when is large. The cleaning cloth 5 is wound around the cleaning cloth winding means 7 as the cleaning cloth winding means 7 rotates counterclockwise. Reference numeral 28 denotes a feed solenoid. The feed solenoid 28 can be realized by a pneumatic solenoid. Reference numeral 29 denotes a one-way clutch, and reference numeral 30 denotes a lever of the clutch 29. The one-way clutch 29 is a clutch that is provided coaxially with the cleaning cloth winding means 7 and is rotatable only in one direction. In FIG. 3A, the cleaning cloth winding means 7 can rotate only in the counterclockwise direction (CCW) by the action of the one-way clutch 29. The lever 30 is a lever that rotates the one-way clutch 29 and is rotatable around the cleaning cloth winding means 7. The lever 30 rotates the cleaning cloth winding means 7 when rotating in the counterclockwise direction, and does not rotate the cleaning cloth winding means 7 when rotating in the clockwise direction. The feed solenoid 28 rotates the lever 30 counterclockwise as necessary.

31 is a follow-up arm. The follower arm 31 is supported at one end by a fulcrum 32 and is rotatable about the fulcrum 32. A tracking bar 33 is attached to the other end of the tracking arm 31. The follower bar 33 follows the winding diameter of the cleaning cloth 5 wound around the cleaning cloth winding means 7. On the other hand, the angle at which the lever 30 can be rotated by the feed solenoid 28 is determined by the position at which the lever 30 hits the tracking bar 33.

FIG. 3B shows a state where the winding diameter of the cleaning cloth winding means 7 is small. The follow-up lever 33 is substantially lowered to the lowest point. As a result, the lever 30 rotates counterclockwise to the maximum angle.

FIG. 3C shows a state where the cleaning cloth winding means 7 has a large winding diameter. The follow-up lever 33 is raised to the uppermost point. As a result, the rotation angle of the lever 30 in the counterclockwise direction is the minimum.

Thus, as shown in FIGS. 3B and 3C, the feed length of the cleaning cloth 5 when the feed solenoid 28 operates once is the winding diameter of the cleaning cloth 5 wound around the cleaning cloth winding means 7. It is always constant. For example, if the feed length of the cleaning cloth 5 is 5 mm when the feed solenoid 28 is operated once, the cleaning cloth 5 is always cleaned regardless of the winding diameter of the cleaning cloth 5 wound around the cleaning cloth winding means 7. The cloth is wound up.

This has many advantages. As shown in FIG. 2, since the first cleaning pad 3 and the second cleaning pad 4 are attached to the base plate 14, the relative positions thereof do not change. On the other hand, the cleaning cloth feeding means 8 shown in FIG. 2 has a constant feeding length of the cleaning cloth 5 per operation. Then, the distance between the first cleaning pad 3 and the second cleaning pad 4 in the cleaning cloth 5 can be defined by the number of feed steps consisting of the number divided by a constant feed length.

FIG. 4 is an explanatory diagram illustrating how the cleaning cloth is fed. In FIG. 4, S is a feed length of one step. The distance between the first cleaning pad 3 and the second cleaning pad 4 shown in FIG. 1 can be expressed by the number of feed steps W. In FIG. 4, W is exemplified as 24 steps. This means that the used portion of the cleaning cloth used in the first cleaning pad 3 reaches the position of the second cleaning pad 4 after being sent 24 steps. The actual length of the feed step W is 120 mm (= 5 mm × 24 steps) if the feed length S of one step is 5 mm.

In FIG. 1, the control unit 12 controls the first pad driving unit 9, the second pad driving unit 10, and the cleaning cloth driving unit 11. The necessity (cleaning sequence) of cleaning the first cylinder 1 and the second cylinder 2 is set in the control means 12 from a printing press main body (not shown). The set parameters are expressed by the cleaning steps of the

respective cylinders

1 and 2. For example, it is assumed that the control unit 12 sets the first cylinder 1 as 5 steps and the second cylinder 2 as 5 steps as one cleaning sequence. Then, the control means 12 rotates the

cylinders

1 and 2 to (1) put the first pad driving means 9 and the second pad driving means 10 into a cleaning state for a predetermined period, and (2) then the first pad The series of operations (1) to (3) in which the driving unit 9 and the second pad driving unit 10 are not cleaned and (3) the cleaning cloth 5 is sent one step in the non-cleaning state are repeated five times. As a result, the first and

second cleaning pads

3 and 4 are in a cleaning state five times, and the cleaning cloth 5 is sent in a total of five steps.

The cleaning cloth 5 becomes dirty when used in the first cleaning pad 3. This dirty part eventually reaches the second cleaning pad 4. The portion used in the first cleaning pad 3 is not used again in the second cleaning pad 4. In order to realize this, the control means 12 performs an idle feed that simply feeds the cleaning cloth 5 with the second cleaning pad 4 in a non-cleaning state until the contaminated portion passes the second cleaning pad 4. . In FIG. 4, sections K, L, M, and N indicate sections of used parts and sections of unused parts. The section K is an unused portion of 4 steps, L is a used portion of 6 steps, M is an unused portion of 9 steps, and N is a used portion of 5 steps.

As shown in FIG. 1, the cylinder cleaning device includes a recognition unit 13 that recognizes a used part and an unused part of the cleaning cloth 5. In FIG. 4, the control unit 12 determines that the second cleaning pad 4 can be used because the K section and the M section are unused portions based on the recognition result of the recognition unit 13. Further, the control means 12 determines that the sections L and N are used parts and cannot be used with the second cleaning pad 4 based on the recognition result of the recognition means 13.
When the sections L and M (used parts) are positioned on the second cleaning pad 4 and the cleaning with the second cleaning pad 4 is necessary, the control means 12 removes the cleaning cloth 5. I'll send it by air. That is, the control unit 12 switches the second cleaning pad 4 to the cleaning state based on the cleaning sequence (cleaning instruction), but the second cleaning pad 4 is in the second state while the used portion is disposed on the second cleaning pad 4. The cleaning pad 4 is brought into a non-cleaning state, and the cleaning cloth 5 is fed in the non-cleaning state (empty feed) until an unused portion is arranged on the second cleaning pad 4, and then the second cleaning is performed. The pad 4 is switched to the cleaning state. Thus, the control means 12 recognizes the used part and the unused part of the cleaning cloth 5 based on the recognition means 13, so that the cleaning cloth 5 is not used as much as possible in the cleaning of the second cleaning pad 4. Control is made so that unused portions are actively used so that the portion is used and waste is reduced.
If only the first cleaning pad 3 performs the cleaning operation, the second cleaning pad 4 is in the non-cleaning state. Therefore, even if the used part passes over the second cleaning pad 4, it is empty. There is no need to feed.

As described above, the first cleaning pad 3 and the second cleaning pad 4 can be freely set in a cleaning state and a non-cleaning state according to an automatic instruction from the printing press main body or an operation instruction from an operator of the printing press. Switching is possible.

FIG. 5 is an explanatory view of how to feed the cleaning cloth 5 when both the first cleaning pad 3 and the second cleaning pad 4 are simultaneously in a cleaning state. FIG. 5A shows the initial state of the first cleaning pad 3, the second cleaning pad 4, and the cleaning cloth 5. In the cleaning cloth 5, the region 51 is a region used in the first cleaning pad 3, and the region 52 is a region used in the second cleaning pad 4. FIG. 5B shows a state where cleaning is in progress. While the cleaning sequence is in progress, the length of the area 54 used in the first cleaning pad 3 and the length of the area 53 used in the second cleaning pad 4 are the same. When the second cleaning head 4 reaches the region 54 (the used part used in the first cleaning pad 3), the control means 12 puts the first and

second cleaning pads

3 and 4 into a non-cleaning state, The cleaning cloth 5 is fed by the number of feed steps W (for example, 24 steps). If it does so, it will be in the state of Drawing 5 (a) again. In the example shown in FIG. 5, the unused portion of the cleaning cloth 5 is not wasted.

FIG. 6 is an explanatory diagram when only the second cleaning pad 4 is used. That is, the cleaning sequence proceeds in the cleaning state only for the second cleaning pad 4. FIG. 6A shows an example in which the second cleaning pad 4 performs the cleaning operation for the length of the region 56. Since the first cleaning pad 3 is at rest, the second cleaning pad 4 can use the entire area of the cleaning cloth 5. Further, as long as the first cleaning pad 3 is in the non-cleaning state, the second cleaning pad 4 continues to use the cleaning cloth 5 as indicated by the region 57 regardless of the distance W. In the example shown in FIG. 6, the unused portion of the cleaning cloth 5 is not wasted. FIG. 6B shows a state in which the first and

second cleaning pads

3 and 4 are again in the cleaning state.

FIG. 7 is an explanatory diagram when only the first cleaning pad 3 is used. In FIG. 7A, in the region 58 and the region 59, both the first cleaning pad 3 and the second cleaning pad 4 are used, and then the second cleaning pad 4 is switched to the non-cleaning state. The area 60 is an unused area. In FIG. 7B, the first cleaning pad 3 continuously performs the cleaning operation, and the second cleaning pad 4 remains in the non-cleaned state. The unused portion 60 passes without being used in the second cleaning pad 4 and is discarded as it is. Subsequently, along with the cleaning operation of the first cleaning pad 3, the used portion 59 of the first cleaning pad 3 comes on the second cleaning pad 4. Unless the second cleaning pad 4 is used, the cleaning cloth 5 is not fed by air. However, when the second cleaning pad 4 is used, the cleaning cloth 5 is fed idle, and the cleaning cloth 5 is not used immediately on the second cleaning pad 4 as shown in FIG. The part is positioned.

A first mode in which the recognition unit 13 recognizes a used part and an unused part of the cleaning cloth 5 will be described. The state of the cleaning cloth 5 shown in FIG. 4 can be recognized based on the software on the control program of the control means 12. In the cleaning cloth 5, the distance between the first cleaning pad 3 and the second cleaning pad 4 can be defined as the number of feeding steps W. Further, the recognition unit 13 can acquire the operation history of the first cleaning pad 3 and the feeding history of the cleaning cloth 5 from the control unit 12. Thereby, the recognition means 13 can recognize the used part of the cleaning cloth 5 used in the first cleaning pad 3 and the unused part of the cleaning cloth 5 not used in the first cleaning pad 3. Therefore, the control means 12 sends the cleaning cloth 5 based on the recognition result of the recognition means 13 while the used part of the cleaning cloth 5 used by the first cleaning pad 3 is moved by the second cleaning pad 4. It is possible to specify a portion to be skipped so that it is not used. If realized by a program, even if the distance W varies depending on the printing press, the setting can be easily changed in accordance with the distance W.

A second mode in which the recognition unit 13 recognizes a used part and an unused part of the cleaning cloth 5 will be described. The state of the cleaning cloth 5 can be recognized based on the hardware implementation by the shift register. In this case, the used part and the unused part are distinguished by binary values, and the bit shift and the feeding step of the cleaning cloth 5 are preferably synchronized. This is because the distance between the first cleaning pad 3 and the second cleaning pad 4 can be defined by the number of feed steps W of the cleaning cloth 5.

A third mode in which the recognition unit 13 recognizes a used part and an unused part of the cleaning cloth 5 will be described. In FIG. 2, 61 is a dirt sensor. The dirt sensor 61 can be a light source that irradiates light on the surface of the cleaning cloth 5 and a reflective dirt sensor that detects the reflected light. Among these, the sensor may be an image sensor that determines dirt as an image, or may be an optical sensor that simply detects reflected light. The dirt sensor 61 is not limited to the reflection type that detects the reflected light of the cleaning cloth 5, but may be a transmission type that detects the transmitted light of the cleaning cloth 5. This is because the reflectance of the cleaning cloth 5 which is not soiled may be close to the reflectance of the color of the printing ink on the cylinder to be removed in the reflection type. In such a case, a transmissive sensor is suitable. The advantage of using the dirt sensor 61 is that the actual dirt condition of the cleaning cloth 5 can be known. The dirt sensor 61 is disposed at a predetermined position between the first cleaning pad 3 and the second cleaning pad 4, and sends the detection result to the recognition means 13. Thereby, the recognition means 13 can recognize the used part and the unused part of the cleaning cloth 5 in the first cleaning pad 3 by the dirt sensor 61. And the control means 12 controls based on the recognition result of the recognition means 13.

As a fifth embodiment of the present invention, an example in which a part of the cleaning cloth that has been used in the first cleaning pad 3 is reused in the second cleaning pad 4 will be described. In the example described above, the portion of the cleaning cloth 5 used in the first cleaning pad 3 is not used in the second cleaning pad 4. However, the cleaning cloth 5 is rarely used until the cleaning capability is saturated. Therefore, the used part (the latter half part of the used part) in which the cleaning cloth 5 used in the first cleaning pad 3 is less dirty can be reused in the initial stage of the cleaning sequence in the second cleaning pad 4. Then, the consumption of the cleaning cloth 5 can be reduced. In FIG. 4, 71 is a used part used in the first cleaning head 3 for two steps, and 72 is an unused part for four steps. If the cleaning sequence on the second cleaning pad 4 is performed by cloth feed of 6 steps, the first 2 steps use the second half of the used portion of the first cleaning head 3 indicated by 71, and the next In the four steps, an unused portion indicated by 72 is used. That is, the recognition unit 13 recognizes a part of the cleaning cloth 5 that has been used in the first cleaning pad 3 as being equivalent to an unused part that has not been used in the first cleaning pad 3 yet. To do. Therefore, the part recognized by the recognition unit 13 as unused can be used again by the second cleaning pad 4. Note that the recognition unit 13 may set a portion that is recognized as an unused portion at the feeding position of the cleaning cloth 5, or may be set based on the actual use state of the cleaning cloth 5 by the dirt sensor 61.
As described above, when the portion (the first half of the used portion or the unusable portion) in which the cleaning ability of the cleaning cloth 5 is saturated passes through the second cleaning pad 4, the control means 12 uses the second cleaning pad. When the part (the second half of the used part and the usable part) where the cleaning ability of the cleaning cloth 5 is not saturated passes through the second cleaning pad 4, the second cleaning pad 4 is put into the cleaning state. However, in the cleaning sequence of the second cleaning pad 4, the used part is used only in the initial stage, and the unused part is used in the remaining stage. As described above, since a part of the cleaning cloth that has been used in the first cleaning pad 3 is reused in the second cleaning pad, the cleaning ability of the cleaning cloth 5 can be utilized to the maximum extent. As a result, the consumption of the cleaning cloth 5 can be further reduced.

FIG. 8 is an explanatory diagram of the step number correction. With the step number correction, the distance between the first cleaning pad 3 and the second cleaning pad 4 shown in FIG. 1 can be defined by the number of feed steps W of the cleaning cloth 5, but an error may occur. The reason for this is that, as shown in FIG. 5, the cleaning cloth 5 wound around the cleaning cloth winding means 7 may be a complete circle 41, but as indicated by the dotted line 42, it depends on the tension of the cleaning cloth 5. May be somewhat distorted. This distortion appears as an error in the number of feed steps W. Then, it is necessary to set the feed step number W in consideration of an error. If the error is reduced, it is possible to approach the actual number of steps. Therefore, it is desirable for the control means 12 to correct the feed step number W. For example, in FIG. 4, the number of feed steps W is defined as 24 steps, but the start of winding of the cleaning cloth winding means 7 is 23 steps, 24 steps in the middle, and 25 steps at the end of winding when the winding diameter increases. it can. However, actual correction varies depending on the brand of the printing press or cleaning cloth, and the actual correction value is determined by experiment. In this way, since an accurate feed length of the cleaning cloth 5 can be specified, wasteful disposal of unused portions of the cleaning cloth 5 can be further reduced.

DESCRIPTION OF SYMBOLS 1 1st cylinder 2 2nd cylinder 3 1st washing pad 4 2nd washing pad 5 Washing cloth 6 Washing cloth supply means 7 Washing cloth winding means 8 Washing cloth feeding means 9 First pad drive means 10 Second Pad drive means 11 Cleaning cloth drive means 12 Control means 13 Recognition means 14 Base plate 15 Rail 16 Support roller 17 Air solenoid 61 Dirt sensor

Claims

A first cleaning pad for cleaning the first cylinder;
First pad driving means for switching the first cleaning pad between a cleaning state and a non-cleaning state;
A second cleaning pad for cleaning the second cylinder;
Second pad driving means for switching the second cleaning pad between a cleaning state and a non-cleaning state;
Cleaning cloth supply means for supplying the cleaning cloth;
Cleaning cloth winding means for winding the cleaning cloth;
Cleaning cloth feeding means that feeds the cleaning cloth from the cleaning cloth supply means, first passes through the first cleaning pad, subsequently passes through the second cleaning pad, and then sends the cleaning cloth toward the cleaning cloth winding means. When,
Cleaning cloth driving means for driving the cleaning cloth feeding means;
Control means for controlling the first pad driving means, the second pad driving means and the cleaning cloth driving means;
Recognizing means for recognizing a used part of the cleaning cloth used in the first cleaning pad and an unused part of the cleaning cloth not used in the first cleaning pad;
The cylinder cleaning apparatus, wherein the control unit controls the unused portion to be used by the second cleaning pad based on a recognition result of the recognition unit.
The recognition means recognizes a part of the used cleaning cloth used in the first cleaning pad as unused, and the control means reuses the part recognized as the unused part in the second cleaning pad. The cylinder cleaning apparatus according to claim 1, wherein:
When executing the cleaning sequence of the second cleaning pad, the control means uses the used portion in the second cleaning pad in the initial stage of the cleaning sequence, and the remaining stages of the cleaning sequence. The cylinder cleaning apparatus according to claim 1, wherein the unused portion is used in the second cleaning pad.
The cleaning cloth feeding means feeds the cleaning cloth every fixed feeding length, and the recognition means determines the distance of the cleaning cloth from the first cleaning pad to the second cleaning pad as the feeding length. The cylinder cleaning apparatus according to any one of claims 1 to 3, wherein the cylinder cleaning device is recognized by the number of feed steps consisting of the number divided by.
5. The cylinder cleaning apparatus according to claim 4, wherein the recognizing unit corrects the number of feeding steps according to a winding diameter of the cleaning cloth wound up by the cleaning cloth winding unit.
The apparatus further comprises a dirt detection sensor for detecting dirt on the cleaning cloth used in the first cleaning pad, and the recognition means determines the used part and the unused part based on the detection result of the detection sensor. The cylinder cleaning device according to any one of claims 1 to 5, wherein the cylinder cleaning device is recognized.