JP2866039B2 - Roll drive braking method and drive braking structure for printing cylinder cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive braking method and a drive braking structure for a printing cylinder cleaning apparatus, and it is possible to arbitrarily set a relationship between a supply side and a take-up side of a cleaning sheet to print a cleaning target. The present invention relates to a drive braking method and a drive braking structure that can be used as a general-purpose printing cylinder cleaning device that can widely cope with conditions such as a rotation direction of a cylinder.

[0002]

2. Description of the Related Art Printing cylinders, such as blanket cylinders, are regularly cleaned because the printing operation causes surface contamination over time. For cleaning such a cylinder surface, a cleaning apparatus using a cleaning sheet is used. This is to allow the cleaning sheet made of nonwoven fabric impregnated with the cleaning liquid to be able to run on the pressing part that can be brought into contact with and separated from the cylinder surface. The surface dirt is wiped and removed using the rotation of the printing cylinder.

In a conventional wiping and cleaning apparatus, a supply roll in which an unused sheet is wound in a roll shape and a take-up roll are mounted on an apparatus frame in parallel with the supply roll. Then, the cleaning sheet fed from the supply roll is connected to a winding roll after passing through a pressing portion to a cylinder, and the cleaning liquid is converted into the cleaning sheet while winding the sheet by rotating the winding roll. In addition to the partial supply, when the impregnated portion of the cleaning liquid reaches the pressing portion, the cleaning liquid is pressed against the cylinder to perform cleaning.

In a cleaning apparatus of this type, a cleaning sheet is conventionally fed in a direction opposite to a rotation direction of a cylinder to be cleaned. Therefore, a supply roll is arranged on an outlet side in a cylinder rotation direction, and is provided on an inlet side. The take-up roll is arranged. Also, if the cleaning sheet is forcibly pulled out due to the rotational contact of the cylinder, there is a problem that the cleaning sheet is wound into the cylinder, so a means for preventing reverse rotation is incorporated in the winding roll on the output side in the cylinder rotation direction. I have. Usually, a one-way clutch is used in combination with the winding drive mechanism. The spindle on which the supply roll is mounted has a built-in braking mechanism to prevent the cleaning sheet from being thickened, and the braking mechanism has a weak braking force that does not affect the winding operation of the winding roll. A mechanism is employed in which the friction material is pinched or pressed by a rotating spindle.

[0005]

However, in the conventional cleaning apparatus, the drive braking mechanism between the cleaning sheet supply side and the take-up side in the apparatus uses the rotation direction of the printing cylinder during cleaning and the winding of the cleaning sheet. The relationship is uniformly determined by the relationship of the take-up direction, and the relationship between the supply side and the take-up side of the cleaning sheet is fixed. For this reason, when the sheet is fed backward in order to effectively use the cleaning sheet, or when a cleaning operation using the back surface of the sheet is to be performed, a driving mechanism for a spindle to which a supply roll and a take-up roll are attached and A special mechanism was required in addition to the braking mechanism, and the structure was such that it was not possible to flexibly respond to changes in the rotation direction of the printing cylinder and the feeding direction of the cleaning sheet. Also, the braking mechanism on the supply roll side cannot feed the sheet if the braking force overcomes the winding sheet driving force of the cleaning sheet, and cannot be used as a braking mechanism for preventing the sheet from being caught by the rotation of the cylinder. However, the versatility of the conventional cleaning device has been impaired.

The present invention focuses on the above-mentioned conventional problems, and can arbitrarily set a supply roll and a take-up roll to be incorporated in a cleaning apparatus, and can control a sheet without being affected by the rotation direction of a cylinder to be cleaned. It is an object of the present invention to provide a printing cylinder cleaning device that can effectively prevent the entanglement of a printing cylinder. It is another object of the present invention to provide a cleaning apparatus having a structure capable of effectively using a cleaning sheet.

[0007]

In order to achieve the above object, a roll driving braking method of a printing cylinder cleaning apparatus according to the present invention is directed to a cleaning roll fed from a supply roll through a pressing section to a take-up roll. A roll drive braking method for a printing cylinder cleaning device, wherein a winding sheet is capable of being wiped and cleaned by pressing a cleaning sheet against the surface of a printing cylinder with the pressing portion, wherein one end of each of the supply roll and the winding roll is mounted. And the other end of each of the two rolls can be independently braked, and at least printing is performed while driving the spindle on the side on which the take-up roll is mounted. A spindle on which the roll from which the cleaning sheet is drawn out along the cylinder rotation direction when the cleaning sheet is in contact with the cylinder is mounted. It constructed as to perform braking wiping cleaning while applying for.

Further, the roll drive braking device of the printing cylinder cleaning device according to the present invention enables the cleaning sheet fed from the supply roll to be wound on a take-up roll via a pressing portion, and the cleaning sheet is pressed by the pressing portion. A roll drive braking structure of a printing cylinder cleaning device that performs wiping cleaning by pressing against a printing cylinder surface, wherein one end of each of the supply roll and the take-up roll is mounted and can be independently driven to rotate. A winding spindle comprising: While selectively driving the drive spindle on the side where is mounted,
Control means for issuing a braking command to a brake spindle to which at least one of a supply roll or a take-up roll is attached on a side from which the cleaning sheet is drawn out along the cylinder rotation direction when the cleaning sheet is in contact with the printing cylinder; It is characterized by comprising. In this case,
The braking mechanism may be an air brake mechanism including a face plate fixed to a spindle and a brake disc pressing the face plate, and may have a structure for generating a high braking force.

[0009]

According to the above construction, the spindle on which the supply roll and the take-up roll are mounted can be arbitrarily selected.
The take-up rotation can be performed by setting the spindle to be rotationally driven with respect to the spindle on which the take-up roll is mounted. At this time, the rotation transmitting mechanism to the spindle to which the supply roll is attached may be automatically separated, and the path to the drive source is arbitrarily adjusted by the control means by the selection switching mechanism. Also, since the rotating direction of the cylinder to be cleaned is determined by the printing machine, when the cleaning device presses and contacts the cleaning sheet, a braking force is applied to the roll on which the cleaning sheet is pulled out. In order to selectively activate the braking mechanism, this can also be arbitrarily determined by the arrangement of the supply or take-up roll, so that sheet entanglement is effectively prevented. Since the braking mechanism is an air brake mechanism capable of making a surface contact between the face plate and the brake disc, a large braking force can be generated, and there is no limitation in relation to the winding drive of the winding roll. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a roll driving braking method and a driving braking structure of a printing cylinder cleaning apparatus according to the present invention will be described below in detail with reference to the drawings. First, the overall configuration of the printing cylinder cleaning device will be described with reference to FIGS. The cleaning apparatus 10 is disposed opposite to a blanket cylinder 12 to be cleaned, and has a frame including a pair of side plates 14 and an H-shaped cross section 16 that is bridged between the side plates. . The stay 16 includes a main stay 20 to which the pressing portion 18 is attached, facing the blanket cylinder 12, and a pair of upper and lower cleaning sheet guide stays 22. A supply roll 26 and a take-up roll 28 for the cleaning sheet 24 are disposed behind the stay 16, and the cleaning sheet 24 is unreeled from the supply roll 26, and from the upper guide stay 22 U in FIG. The paper is wound by a rear winding roll 28 via a guide stay 22D. While braking one or both of the required rolls 26, 28,
Is carried out by intermittently driving the take-up roll 28, and a driving mechanism and a braking mechanism therefor are provided by the side plate 14
It is equipped with. A cleaning liquid supply nozzle 30 is disposed on the side (upper part in the drawing) of the pressing portion 18 inside the stay 16 so as to appropriately supply and supply the cleaning liquid to the cleaning sheet 24. As a result, the cleaning sheet 24 that is intermittently fed reaches the leading end of the pressing portion 18 while being moistened with the cleaning liquid. At this time, the apparatus frame is advanced by a mechanism (not shown), and the blanket cylinder 12 is moved.
The cleaning action is achieved by bringing the pressing portion 18 into contact with the surface of the substrate.

Next, FIG. 5 shows a rotation drive mechanism of the take-up roll 28. Both a drive spindle 32 on which the supply roll 26 is mounted and a drive spindle 34 on which the take-up roll 28 is mounted are selectively driven to rotate. That is, the drive spindles 32 and 34 inserted into the openings of the roll cores of the rolls 26 and 28
The side plate 14 is rotatably supported, and a rotation drive mechanism is provided at a protruding portion of the side plate 14 to the outer surface. In FIG. 5, a semi-fixed gear 32A and an intermediate gear 32B rotatable with respect to the semi-fixed gear 32A are attached to the drive spindle 32 arranged close to the pressing portion 18 in a state of being superposed. ing. The semi-fixed gear 32A and the intermediate gear 32B have the same diameter and the same pitch.
The semi-fixed gear 32A is attached to the spindle 32 via a one-way clutch 36. When the supply roll 26 is attached, the semi-fixed gear 32A can rotate only in the feeding direction of the cleaning sheet 24. On the other hand, a semi-fixed gear 34A, which is always in mesh with the intermediate gear 32B, is attached to the drive spindle 34 arranged at a lower position in FIG. 5, which is also attached via a one-way clutch 36, As shown, when the take-up roll 28 is attached, rotation is transmitted only in the direction in which the cleaning sheet 24 is taken up, and rotation in the loosening direction is prevented.

A spindle 3 having such a gear train
A drive motor 38 is provided for rotationally driving the motors 2 and 34, and is constituted by an electric motor mounted inside the stay 16 of the cleaning device 10 in the embodiment. The motor 38 has a drive shaft 38A penetrated through the side plate 14 so that a tip of the motor 38 faces the outer surface of the side plate 14, and a drive gear 40 is attached thereto. A switching gear 42 is located between the drive gear 40 and the two gears 32A and 32B provided on the upper spindle 32 to constitute a transmission gear. Although in the state, the spindle gear 3
2A and 32B are selectively engaged. Therefore, the drive gear 40 is composed of two spindle gears 3
The switching gear 42 has a cylindrical gear structure having a thickness equal to or greater than the overlapping thickness of the 2A and 32B.
And the same thickness. Therefore, the switching gear 42
Is moved in the tooth trace direction, the rotational driving force from the driving gear 40 is transmitted to the semi-fixed gear 32A to rotate the upper spindle 32, or to rotate the intermediate gear 32B
The rotation of the spindle 34 is transmitted to the lower spindle gear 34 </ b> A via the In order to switch the switching gear 42 between the meshing targets, the stay 16
An air cylinder mechanism 44 is incorporated in the inside of the switching gear 40.
It is connected to.

On the other hand, in the side plate portion opposite to the drive gear train, spindles 32R, 3R mounted on opposite ends of the rolls 26, 28 corresponding to the spindles 32, 34, respectively.
As shown in FIG. 6, a braking mechanism is configured on the 4R side. Both spindles 32R, 34R have the same mechanism, and one of them will be described. This brake mechanism has an air brake structure, and particularly adopts a structure that generates a large braking force by bringing a disk into surface contact with a face plate that rotates integrally with the spindles 32R and 34R.

A brake housing 46 surrounding the projecting distal end of the spindle 32R is attached to the side plate 14, and a face plate 48 for sealing the outer end surface of the brake housing 46 is attached. The face plate 48 is fixed to the spindle 32R, and is rotated together with the spindle 32R while sealing the brake housing 46.
In a closed chamber surrounded by the brake housing 46 and the face plate 48, a brake disk 50 slidable in the housing 46 is arranged, and at the same time, the
Can be moved in the axial direction.
The brake disk 50 partitions the inside of the brake housing 46 back and forth to form an air chamber, and high-pressure air can be supplied to the front and rear air chambers by air hoses 52 connected to the housing 46. A brake lining 54 is provided on a portion of the brake disk 50 facing the face plate 48, and air is introduced into the back side of the disk 50, as shown in FIG.
4 comes into surface contact with the face plate 48, and the spindle 32R integrated with the face plate 48 can be rotationally braked. Therefore, the face plate 48 functions as a brake shoe. Conversely, by supplying air to the air chamber on the brake lining 54 side, the brake lining 54 separates from the face plate 48 as a brake shoe, and the spindle 32R
Is freely rotatable.

Such a structure is similar to that of the other spindle 34R.
The same applies to the above. By controlling the supply and exhaust of air, braking can be arbitrarily generated, and at the same time, the spindles 32R and 34R to be braked can be selected.
It is also possible to brake at the same time.

In the above-described configuration, the driving spindle 3
2 and 34 are switched, or the braking spindles 32R and 34R are switched, and the apparatus frame 16 is moved back and forth to make the pressing portion 18 contact or separate from the blanket cylinder 12, and the cleaning liquid is further sprayed. Control means 60 for controlling the timing of the operation is provided, and this is shown in FIG. The control means 60 includes a rotary timer 62 as a variable driving program execution timer, and a sequencer 64 which outputs an operation signal to each control object while adjusting a drive signal in time series according to an execution program by the timer 62. It is configured. Further, an operation panel 66 is connected to the control means 60 so that initial operation is set, activated, stopped, and the like. Drive spindle switching solenoid valve 6 receiving the output of sequencer 64
8, a brake switching electromagnetic valve 70, a pressing electromagnetic valve 72 for operating the apparatus, a winding operation unit 74 for outputting a winding signal of the cleaning sheet to the drive motor 38, and a cleaning liquid electromagnetic valve unit 76. The sequencer 64 executes a cleaning operation by outputting a drive signal for a required time to each element in accordance with a prescribed program. Here, the rolls to be mounted on the drive spindles 32 and 34 described above can be arbitrarily changed, and the spindles 32R and
Since 34R is determined by the rotation direction of the blanket cylinder 12, the setting and input may be performed on the operation panel 66 so that the selection can be made in accordance with the combination mode.

Next, a method of driving and braking a cleaning apparatus using the above structure will be described with reference to FIGS. First, FIG.
As shown in (1), in a state where the blanket cylinder 12 is rotated clockwise, the supply roll 26 around which the unused cleaning sheet 24 is wound is attached to the spindles 32 and 32R on the side closer to the pressing portion 18, and Rear spindle 34, 3
When the take-up roll 28 is attached to the 4R, the supply roll 26
Then, the leading end of the cleaning sheet 24 is pulled out, passed from the outer surface of the upper guide stay 22U via the pressing portion 18, and further connected to the winding roll 28 via the lower guide stay 22D. Then, the switching gear 42 is set to the rotation drive mode of the winding roll 28 by the switching air cylinder mechanism 44 as shown in FIG. When the take-up roll 28 is rotated in the opposite direction to the supply roll 26, the cleaning sheet 24 is pulled out of the take-up roll 28 by the rotation of the blanket cylinder 12, and in this case, the braking mechanism is used. The brake spindle 34R on which the roll 28 is mounted is actuated.

Next, if the rotation direction of the blanket cylinder 12 is counterclockwise in FIG. 1A, as shown in FIG.
The braking signal is switched so as to act on the sixth braking spindle 32R.

On the other hand, as shown in FIG. 2A, while the blanket cylinder 12 is being rotated clockwise, the take-up roll 2 is attached to the spindles 32 and 32R on the side closer to the pressing portion 18.
8 and the supply roll 26 formed by winding the unused cleaning sheet 24 around the rear spindles 34 and 34R, the leading end of the cleaning sheet 24 is pulled out from the supply roll 26, and the pressing portion is pressed from the outer surface of the upper guide stay 22U. , And the leading end is connected to a take-up roll 28 via a lower guide stay 22D. Then, the switching gear 42 is slid from the position shown in FIG. 5 by the switching air cylinder mechanism 44 so that the rotation is transmitted to the drive spindle 32, and the rotation of the winding roll 28 mounted on the spindle 32 is rotated. Set the mode. When the take-up roll 28 is rotated in the same direction as the supply roll 26, the rotation of the blanket cylinder 12 causes the take-up roll 28 to rotate.
, So that the cleaning sheet 24 is drawn out from
In this case, the braking mechanism operates the braking spindle 32R on which the winding roll 28 is mounted.

Next, when the rotation direction of the blanket cylinder 12 is counterclockwise in FIG. 2A, as shown in FIG.
The braking signal is switched so as to act on the sixth braking spindle 34R.

Further, as shown in FIG. 3, when the braking mechanism is applied to both braking spindles 32R and 34R, it is possible to cope with all rotation modes. In addition, in the above configuration, the supply roll 26 is
As shown in (1), the cleaning operation is performed on the entire cleaning sheet 24 by attaching to the spindles 32 and 32R on the side close to the pressing portion 18.
There is an advantage that the cleaning operation using the back surface of the cleaning sheet 24 can be performed after the is wound around the winding roll 28. This is because after the winding on the winding roll 28 is completed, the supply roll 26
The cleaning sheet end is removed from the roll core 26A, and the cleaning sheet 24 is supplied to the supply roll core 26A via the pressing portion 18 from the winding roll 28 side so that the back surface of the cleaning sheet becomes the wiping surface.
Is reconnected, and the blanket cylinder 1 is wound by the winding rotation drive of the supply roll core 26A while utilizing the back surface of the sheet.
2 is performed. This is because when the winding of the cleaning sheet 24 is completed from the initial cleaning posture shown in FIG.
4 is wound with the stained portion as the inner surface.
This is realized by directly shifting to the cleaning posture as shown in (1). Therefore, the take-up roll 28 around which the used cleaning sheet 24 is wound is used as a supply roll, and the empty supply roll core 26A is used as a take-up roll. After such rewinding is completed, the rotational force of the drive motor 38 is applied to the supply roll core 2.
6A, the switching gear 42 is connected to the semi-fixed gear 32 on the spindle 32 side mounted on the roll core 26A.
Engage with A. Then, the brake mechanism is operated by the spindle 32 so that the brake is applied only at the time of wiping and cleaning the take-up roll 28 on which the other used cleaning sheet 24 is wound.
It is possible to perform the cleaning as before, while switching to R and operating.

[0022]

As described above, according to the present invention,
A drive spindle to which one end of each of the supply roll and the take-up roll is mounted and which can be independently driven to rotate, and the other ends of the two rolls which are arranged coaxially with each of the drive spindles are mounted. When the cleaning sheet is in contact with the print cylinder while selectively driving the drive spindle on the side on which the take-up roll is mounted, the brake spindle includes a braking spindle that is capable of braking by incorporating an independent braking mechanism. A control means for issuing a braking command to a braking spindle on which at least one of a supply roll or a take-up roll on which the cleaning sheet is drawn out along the cylinder rotation direction is provided. Can be set arbitrarily, so that the supply roll and take-up roll incorporated in the cleaning device can be mounted on any spindle. , Entanglement preventing sheet without being influenced by the rotational direction of the cleaning target cylinder, the effect is obtained to be to obtain achieving effective utilization of the cleaning sheet at the same time.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a drive braking method according to a first embodiment, and is an explanatory view of a switching state of a braking target before and after a change in a rotation direction of a roll blanket cylinder.

FIG. 2 is a schematic explanatory view of a drive braking method according to a second embodiment, illustrating a switching state of a braking target before and after a change in a rotation direction of a roll blanket cylinder.

FIG. 3 is an explanatory view of a third embodiment, and is an explanatory view of a braking state of spindles of both rolls.

FIG. 4 is a schematic front view of a partial cross section of the entire configuration of the cleaning device.

FIG. 5 is a side view and a partial cross-sectional front view of a driving unit of the cleaning device used in the embodiment.

FIG. 6 is a cross-sectional configuration diagram of a brake mechanism of the device.
It shows a braking state and a non-braking state.

FIG. 7 is a control block diagram of the same device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cleaning apparatus 12 Blanket cylinder 14 Side plate 16 Stay 18 Pressing part 20 Main stay 22 (22U, 22D) Guide stay 24 Cleaning sheet 26 Supply roll 28 Winding roll 30 Cleaning liquid supply nozzle 32, 32R Spindle 32A Semi-fixed gear 32B Intermediate gear 34 , 34R spindle 34A semi-fixed gear 36 one-way clutch 38 drive motor 40 drive gear 42 switching gear 44 air cylinder mechanism 44A operating rod 46 brake housing 48 face plate 50 brake disc 52 air hose 54 brake lining 60 control means 62 rotary timer 64 sequencer 66 operation Panel 68 Drive spindle switching solenoid valve 70 Brake switching solenoid valve 72 Pressing solenoid valve 74 Winding operation unit 76 Solenoid valve unit

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-137236 (JP, A) Registered utility model 3004930 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 35 / 00-35/06

Claims (3)

(57) [Claims] 1. A printing cylinder cleaning apparatus which enables a cleaning sheet fed from a supply roll to be taken up by a take-up roll via a pressing unit, and performs wiping cleaning by pressing the cleaning sheet against the surface of the printing cylinder at the pressing unit. A roll driving braking method, wherein a spindle on which one end of each of the supply roll and the take-up roll is mounted can be selectively driven, and each spindle on which the other ends of the two rolls are mounted is independently controlled. When the roll on which the cleaning sheet is drawn out along the cylinder rotation direction at least when the cleaning sheet is in contact with the printing cylinder while driving the spindle on the side where the take-up roll is mounted, A roll drive braking method for a printing cylinder cleaning device, wherein wiping cleaning is performed while applying braking to a spindle to be mounted. 2. A printing cylinder cleaning apparatus which enables a cleaning sheet fed from a supply roll to be wound on a take-up roll via a pressing portion, and performs wiping cleaning by pressing the cleaning sheet against the surface of the printing cylinder with the pressing portion. A roll drive braking structure, comprising a drive spindle to which one end of each of the supply roll and the take-up roll is mounted and which can be independently driven to rotate, and which is arranged coaxially with each of the drive spindles. The other end of both rolls is mounted, and an independent braking mechanism is incorporated in each of the rolls, and a braking spindle is provided which can be braked.The drive spindle on the side on which the winding roll is mounted is selectively driven to perform printing. At least a supply roll or a take-up roll on the side from which the cleaning sheet is drawn out along the cylinder rotation direction when the cleaning sheet is in contact with the cylinder. And a control means for issuing a brake command to a brake spindle to which one of the rollers is mounted. 3. The printing apparatus according to claim 2, wherein the braking mechanism is an air brake mechanism including a face plate fixed to a spindle and a brake disk pressing the face plate, and has a high braking force generating structure. Roll drive braking structure for cylinder cleaning device.