JPH028055A - Cylinder-cleaning apparatus and method for printer - Google Patents

Abstract

PURPOSE:To ensure a compact construction and facilitate rewinding a cleaning fabric by disposing a pressing roller incorporating a driving mechanism, and providing a pressing means, a driving means and a switching means. CONSTITUTION:A pressing roller 40 is disposed, and pressing means 210A, 210B, a driving means, a switching means and the like are provided, whereby the roller 40 can be pressed against and released from a cylinder 2, and is rotated by a driver 44 incorporated therein, the rotation being transmitted to a fabric payout roll 8 or a fabric take-up roll 9. With a shift lever 301 operated, the rotation is transmitted to either one of the rolls by a friction disk 106C or 106D. In a cleaning step, the roll 9 is rotated to feed a cleaning fabric 10 relative to a shaft, and the fabric 10 is taken up, without slacking, under a slipping phenomenon between two sets of the friction disks. When the cleaning fabric 10 of the roll 8 runs out, the transmission of the rotation of the roller 40 is switched to the roll 9, and the rotation is reversed, whereby the fabric 10 is rewound.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a device for cleaning the outer peripheral surface of a cylinder of a printing press, such as a blanket cylinder of an offset printing press or a plate cylinder of a gravure printing press, and in particular a cleaning cloth. The present invention relates to a cylinder cleaning device for a printing press that is suitable for simplifying and compacting the winding or unwinding mechanism of a printing press.

[Conventional technology]

Conventionally, the 20th drive mechanism of the automatic cylinder cleaning device of a printing press has been used for boat fishing by transmitting the rotation of an external motor to the winding core of a winding roll, or by using an air cylinder, etc. A mechanism is used that winds up the cleaning cloth by converting the operation of an actuator into rotational movement of a winding core. (Tokuko Showa 56
(Refer to Publication No. 37069) In Fig. 10, a pair of side plates 7A and 7 are attached to frames (not shown) on both sides of the printing press body.
A pair of rolls, such as a cloth supply roll 8 and a cloth take-up reroll 9, are supported in parallel and rotatably on B. Each end of a belt-shaped cleaning cloth 1o is wound around these rolls 8 and 9, and a predetermined tension is applied thereto. A timing pulley 34 is attached to one shaft end of the cloth winding reroll 9, and is actively rotated at a predetermined speed by a motor 31 with a reduction gear via a timing belt 33. Between the cloth supply roll 8 and the cloth winding reroll 9, there is a cross section parallel to the axial direction (longitudinal direction) of these rolls.
A letter-shaped stay 11 is provided, and both ends thereof are supported by side plates 7A and 7B. This stay 1
1, a hollow chamber 1 is provided in parallel to the cloth supply roll 8 and the cloth winding reroll 9 in a portion facing the blanket cylinder 2.
3, and a pressure pad 12 made of an elastic material is attached to the surface facing the blanket cylinder 2.

This chamber 13 is connected to a compressed air source (not shown), and when air is supplied, the pressure pad 12 expands, and the cleaning cloth 1o that moves while sliding on the outer surface of the pressure pad 12 is placed on the blanket. It is configured to press against the barrel 2. During this time, the surface of the blanket wound around the blanket cylinder 2 is wiped clean. Since the drive means for the cloth take-up re-roll protrudes outside the main body of the cleaning device, the installation area for the cleaning device is large, and the cylinders, rollers, quick-acting devices, etc. of the printing press require space inside the frame of the printing press. (If the cylinder cleaning device is built in, it may be difficult to install the cylinder cleaning device due to space constraints.)

In addition, the motor used to rotate the core of conventional cloth take-up re-rolls is a forward-rotating constant-speed motor with a reduction gear, and the cloth supply roll is manually rotated to rewind the cleaning cloth after cleaning. I was rewinding it by reversing it. Furthermore, since the rotational speed of the cloth take-up re-roll is not variable, the cleaning cloth feed speed increases as the diameter of the cloth take-up re-roll increases, leading to problems such as an unnecessarily large amount of cleaning cloth being consumed. Ta.

[Problem to be solved by the invention]

In conventional printing press cylinder cleaning devices.

The entire device is large and difficult to install inside the printing press frame, and it takes time and effort to rewind the cleaning cloth. Since the rotational speed of each roll cannot be changed, there is a problem in that the feeding speed of the cleaning cloth cannot be adjusted and the cleaning cloth is wasted.

An object of the present invention is to provide a compact structure that can be installed within the limited space of a printing press, and to facilitate the unwinding of the cleaning cloth. An object of the present invention is to provide a cylinder cleaning device and method for a printing press that can keep the cleaning cloth feeding speed constant regardless of changes in the outer diameter of a reroll.

[Means to solve the problem]

In order to achieve the above object, the cylinder cleaning device for a printing press according to the present invention is suspended between a pair of rolls whose ends are supported by a side plate, and a cleaning cloth supplied from one of the rolls. Cleaning between a pair of rolls in a cylinder cleaning device for a printing press, which is equipped with a pressing means for pressing against or separating from the outer periphery of a cylinder of a printing press, and a driving means for moving a cleaning cloth relative to the outer periphery of the cylinder. A pressing roller is disposed in the middle of the path, and a pressing means for pressing or separating the pressing roller from the cylinder, a drive mechanism for rotating the pressing roller, and a slip mechanism for transmitting the rotation of the pressing roller to one of the pair of rolls. The roller is configured to include a body movement means comprising a power transmission mechanism incorporating a power transmission mechanism, and a switching means for switching transmission of rotation to either one of the pair of rolls.

The pressing means includes, for example, a stud that rotatably supports one end of the side plate on the machine frame, and a pressing machine that presses or releases the other end of the side plate facing the cylinder. It consists of a cylinder and a knuckle and pin that connect the air cylinder to the side plate. Alternatively, as another method, the side plate is fixed to the frame of the printing press body, and consists of a pressing mechanism in which only the pressing roll is pressed against and released from the printing press cylinder by an actuator such as an air cylinder.

Further, the drive mechanism includes a motor built into the pressure roller and rotates the pressure roller, and the drive mechanism is a motor having forward and reverse functions.

Furthermore, the power transmission mechanism includes a timing pulley fixed to the shaft of the pressure roller, a transmission section attached to the shaft of each of the pair of rolls, and a suspension system (between each transmission section and the timing pulley). The transmission section consists of a pulley on which the timing belt is suspended, a friction disk that is fixed to the pulley and freely attached to the shaft with a liner fixed to the other end surface, and a friction disk that faces the liner. A movable friction disk that fixes the liner and engages with the shaft in the rotational direction, a tightening handle that is provided opposite to the movable friction disk and is screwed onto the threaded portion of the shaft, and the tightening handle and the movable friction disk. A spring is provided between the movable friction disk and the shaft, and a spline key is provided between the movable friction disk and the shaft portion to engage each other during rotation.

On the other hand, the switching means includes a link that is swingable in the axial direction and has one end supported on a side plate, a shift lever that intersects with the link and has one end rotatably supported on the other end of the link. It consists of a central pin that holds the center position of the shift lever and rotatably supports the shift lever, and a frog crotch that engages with each friction disk, and the frog crotch has a ring that engages with a recess of the friction disk;
It has a structure consisting of bolts and nuts that rotatably hold the ring on the shift lever.

Then, drill a long hole in the axial direction at one end of the link.

A clamp screw shall be provided to support the link on the side plate through an elongated hole.

In addition, the transmission part can transfer the cleaning cloth without slack to the 20th or 10th line.
- It has a slip mechanism for winding up or unwinding the roll.

Further, in the method for cleaning a cylinder of a printing press according to the present invention, a pressure roller disposed in the middle of a cleaning path between a pair of rolls is pressed against or released from the cylinder, and the pressure roller is rotated by a drive mechanism to rotate the pressure roller. The cleaning cloth is configured to transmit rotation to one of a pair of rolls, and to wind up or unwind the cleaning cloth by switching transmission of rotation to either one of the pair of rolls, and one end is rotatably supported on the machine frame. The other end of the side plate is pressed or released, and the pressure roller is pressed against or released from the cylinder. Alternatively, as another method, the side plate is fixed to the frame of the printing press body, and only the pressure roll is pressed onto and released from the printing press cylinder by an actuator such as an air cylinder.

The pressure roller is rotated by a motor built into the pressure roller, and the rotation is transmitted to one of the rolls via a timing belt suspended from a pulley provided on each shaft. The rotation of the friction disk is transmitted to the shaft portion by opposing the movable friction disk and the friction disk provided on the shaft through the liner, and moving and pressing the movable friction disk into contact with each other.

Then, the rotation of one of the rolls is switched by the switching means, the cleaning cloth is wound onto the other roll to clean the cylinder, and then the cleaning cloth can be rewound onto one of the rolls.

[Effect]

According to the present invention, the press roller is disposed in the cylinder cleaning device of the printing press, and the press roller is provided with the press means, the drive means, the switching means, etc., so that the press roller can freely press against or detach from the cylinder. is rotated by a built-in IM drive device, and the rotation is transmitted to one roll (fabric supply roll) or the other roll (fabric take-up reroll) via a power transmission mechanism. By operating the shift lever, rotation is transmitted to one of the rolls via the friction disk, and in the cleaning process, the other roll is rotated to feed the cleaning cloth relative to the shaft. The cleaning cloth is wound up without slack due to the slip phenomenon between the sets of friction disks. When the cleaning cloth on one roll runs out, the rotation transmission of the pressure roll is switched to the other roll, the rotation is reversed, and the cleaning cloth is rewound.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIGS. 1 to 4, a pair of rolls are rotatably supported at their respective ends by a pair of side plates 7A and 7B attached to the machine frames 201A and 201B at both ends of the cylinder 2. For example, cloth supply roll 8
A belt-shaped cleaning cloth 10 is suspended between the cloth take-up reroll 9 and the belt-shaped cleaning cloth 10 is supplied from one of the rolls, for example, the cloth supply roll 8.
A cylinder of a printing press, which is equipped with a pressing means for pressing or releasing the cleaning cloth 10 on the outer periphery of the cylinder, and a driving means for the other roll, such as cloth winding reroll 9, for winding up the cleaning cloth 10 and moving it relative to the outer periphery of the cylinder. In the cleaning device, a press roller 40 is disposed in the middle of the cleaning path between the cloth supply roll 8 and the cloth take-up reroll 9, and the press roller 40 is pressed against or released from the cylinder 2, thereby causing the press roller 4o to move into the cylinder. Cleaning cloth 10 constructed on the opposite surface of 2
and a drive mechanism (a motor) disposed inside the pressure roller 40 to move the cleaning cloth 10 relative to the outer periphery of the cylinder 2 by driving the pressure roller 40. ) 44 and a power transmission mechanism incorporating a slip mechanism that transmits the rotation of the pressure roller 40 to the 10th rule 8 or the 20th rule 9, and the rotation is transmitted to the cloth supply roll 8 or the cloth winding roll 9. and switching means for switching.

In the embodiment shown in FIGS. 1 and 2, the pressing means is a stud 202A that rotatably supports one end of the side plate 7A or 7B on the machine frame 201A or 201B.
or 202B (Hereinafter, members with the symbol A or B are assumed to be assembled with members with the same symbol. For example, the side frame 7A has the stud 2 attached to the machine frame 201A.
02A) and side plate 7A or 7B.
and a presser that presses or separates the other end of the cylinder 2 from the air cylinder 210.
A or 210B and this air cylinder 210A or 21
It is composed of a knuckle 211A or 211B that connects 0B to the side plate 7A or 7B and a pin 212A or 212B, and serves as a pressing means to move the entire cleaning device.

Alternatively, only the pressure roller may be moved.

In the embodiment shown in FIGS. 1 and 5, the quick-acting means is built in the pressure roller 40, and includes a motor 44 that rotates the pressure roller 40, and a motor 44 that rotates the pressure roller 4o, and a motor 44 that controls the rotation of the pressure roller 4o from the cloth supply roll 8 or the cloth winding roller. The motor 44 is configured with a power transmission mechanism that incorporates a slip mechanism that transmits transmission to each of the shaft portions 82A and 92A of the reroll 9, and the motor 44 has a speed of, for example, 0.5 to 50 RPM.
The motor has forward and reverse functions. Pressing roller 4
As an example of the internal structure of the press roller 4o, the stator 46 of the motor 44 and the rotor 45 of the motor 44 are built into the press roller 4o, and the stator 46 is integrally fixed to the inner wall of the press roller 40. A current supplied from an electrode 52 of a power supply plate 51 is guided to the stator 46 by a current collector 50 of a current collector plate 49 . Power is transmitted to the power supply plate 51 through the side plate 7.
This is done via a conductive wire 58 that is wired from the outside through a hollow portion at the center of the shaft portion 42B fixed to the shaft portion B.

The output shaft 53 of the motor 44 is connected to a joint 54 to reduce continuous shooting 55.
The shaft 56 of the speed reducer 55 is connected to the coaxial shaft portion 42A via a joint 57.

Both ends of the shaft portions 42A and 42B are supported within the pressure roller 40 by bearings 43A and 43B, but are fixed on the side plates 7A and 7B.

Therefore, when power is supplied to the motor 44, the pressing roller 4
0 is engaged with the speed reducer 55 and driven to rotate.

Returning to FIGS. 1 and 2, the power transmission mechanism includes a timing pulley 101 fixed to the shaft portion 42A of the pressure roller 40.
, transmission parts 1ooC and 100D attached to the shaft parts 82A and 92A of the cloth supply roll 8 and cloth winding roll 9, respectively, and transmission parts 100C and 100D, respectively.
and a timing belt 120 suspended between the timing pulley 101 and the timing pulley 101.
and 100D are a pulley 102C or 102D on which a timing belt 120 is suspended, and a shaft portion 82A or 92A which is not fixed to this pulley 102C or 102D, has a liner 104C or 104D fixed to the other end surface, and is rotatable.
Friction disc 103C or 10 attached to
3D (Hereinafter, members with the symbol C or D are assumed to have members with the same symbol assembled in one detail. For example, the transmission part 100C has a pulley 102C and a liner 104C.
A friction disk 103C) which is fixedly attached to the shaft portion 82A and freely attached to the shaft portion 82A, and a liner 104C or 1
04D The opposing liners 107c or 107D are fixed and the rotation direction is the respective shaft portion 82. A or 92A
moving friction disc 106C or 10 engaged with
6D and this friction disc 106G or 106
A tightening handle 108C or 108D screwed onto the threaded portion of each shaft portion 82A or 92A facing D, and a spring provided between the tightening handle 108C or 108D and the movable friction disk 106G or 106D. 109C or 109D,
A spline key 110C or 11 that slides in the axial direction but engages in the rotational direction between the movable friction disk 106C or 106D and the respective shaft portion 82A or 92A.
0D is provided.

Then, a switching means for switching the rotation of the cloth supply roll 8 and the cloth winding roll 9 is installed, and this switching means operates in the axial direction (
A link 304 which is swingable in the QR direction) and whose one end is supported by the side plate 7A, and a link 304 which intersects with the link 304 and which is swingable in the QR direction) and which is supported at one end by the side plate 7A. A shift lever 301 whose one end is rotatably supported by the other end of the shift lever 304;
a center pin 302 that holds the center position of the shift lever 301 and rotatably supports the shift lever 301; a stay 11 and a two-movement friction disk 106 that screw the center pin 302;
The frog crotch 307C or 307D is composed of a semicircular ring that engages with a recess of the movable friction disk 106C or 106D, and a frog crotch 307C or 307D that engages with the shift lever 301. Bolts and nuts 308C or 308 that are held rotatably
It consists of D. A horizontally elongated hole 305 is bored in one end of the link 304 in the axial direction of the link 304, and a clamp screw 306 is provided to support the link 304 on the side plate 7A through the elongated hole 305.

As a method of shifting the shift lever 301, instead of manually operating the link 304, an air cylinder may be provided in place of the link 304.

On the other hand, the transmission unit 100C or 100D has a friction disk 103D that winds or rewinds the cleaning cloth 10 to the cloth supply roll 8 or the cloth winding reroll 9 by the length of the cleaning cloth 10 without slack.
and a slip mechanism according to 106D.

Next, the present invention will be explained in detail.

As shown in FIGS. 1 and 2, the cloth take-up reroll 9 is driven by a friction disk 103D integrated with a pulley 102D that freely rotates with respect to one shaft portion 92A.
is a moving friction disk 106D facing this
When the shift lever 301 is shifted in the direction of the arrow J, that is, in the direction of the arrow, the pulley 102D moves between the friction disc 103D and the moving friction disc 106D.
The pressure roll 40 is connected to the shaft portion 92A of the cloth take-up reroll 9 via the press roll 40, and the rotation of the pressure roll 40 is transmitted to the take-up roll 9. In this case, the moving friction disk 106D
Since there is some play between the groove width and the width of the frog crotch 307D, the rotation of the pulley 102D can be adjusted by adjusting the tightening pressure between the friction disk 103D and the moving friction disk 106D using the tightening handle 108D. It is transmitted to the shaft portion 92A with some slip.

The method of driving the cloth supply roll is exactly the same as that of the cloth take-up reroll.

There, the diameter ratio of the timing pulley and the pulley is determined so that the circumferential speed of the cloth supply roll and the take-up roll is faster than the circumferential speed of the pressing roller even when the outer diameter is the minimum.

Next, the operation of pressing or releasing the pressure roller against the cylinder will be explained.

The press roll 40 has shaft portions 42A, 42B held by side plates 7A, 7B, and the side plates 7A, 7B are rotatably suspended from the machine frames 201A, 201B via X rads 202A, 202B. ing. Air cylinders 201A and 201B are attached to optimal positions on the side plates 201A and 201B.

Therefore, when the cleaning operation is not being performed, the rods of the air cylinders 210A and 210B are moved in the backward direction by the control device (not shown), that is, the arrow F shown in FIG.
The pressure roller 40 is urged in the direction of the cylinder 2.
separated from the surface. When cleaning is to be performed next, the air cylinders 210A and 210B are urged in the direction in which the rod advances, that is, in the direction of arrow E, so that the pressure roll 40 is pressed against the cylinder 2.

Next, the feeding operation of the cleaning cloth will be explained.

When cleaning, as shown in FIGS. 6 and 7, the cleaning cloth 1
0 is fed out from the cloth supply roll 8 by the forward rotation of the press roller 40 and wound onto the cloth winding reroll 9. To create this state, the shift lever 301 is shifted in the direction of the arrow shown in FIG. 1, and the link 304 is fixed to the side plate 7A by a clamp screw 306.

When the shift lever 301 is in the direction of arrow I, the sixth
As shown in the figure, the moving friction disk 106C of the fabric supply roll 8 leaves the friction disk 103C on the pulley 102C side. Therefore, the drive by the timing belt 120 is not transmitted to the cloth supply roll 8, the cloth supply roll 8 becomes free, and the cleaning cloth 10 is fed out as the pressure roller 40 rotates. On the other hand, the movable frixy 3 disk 106D of the cloth winding reroll 9 is connected to the pulley 10.
It is pressed against the friction disk 103D on the 2D side and driven by the timing belt 120, and the cloth winding reroll 9 is driven. In this case, the movable friction disk 106C and the fixed friction disk 103C have their respective liners 107C and 104C connected to the spring 10.
Since it is only crimped by 9C, a slight slip occurs.

Therefore, the cloth winding reroll 9 winds up only the slack portion of the cleaning cloth 10.

Rewinding the cleaning cloth As shown in FIGS. 8 and 9, by operating in the opposite order to the above, the cloth feeding direction is reversed, but the pressure roller is placed away from the cylinder.

〔Effect of the invention〕

According to the present invention, a pressure roller with a built-in drive mechanism is disposed in a cylinder cleaning device of a printing press, and the device is provided with a pressing means, a driving device, a switching device, etc., so that the device has a compact structure, and a cleaning cloth It has become easier to wind up and unwind the cleaning cloth, and it has become possible to keep the cleaning cloth feeding speed constant regardless of changes in the winding roll diameter.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the lines ■ and ■ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the lines
4 is a sectional view taken along lines 1 and 2 in FIG. 1, FIG. 5 is a sectional view of a drive mechanism showing another embodiment of the present invention, and FIG. FIG. 7 is a side view illustrating the cleaning cloth winding operation, FIG. 7 is a partially omitted cross-sectional view taken along the line ■ and ■ in FIG. 6, FIG. 8 is a side view illustrating the cleaning cloth rewinding operation of the present invention, and FIG. FIG. 8 is a partially omitted cross-sectional view taken along the lines ■ and ■, and FIG. 10 is a perspective view showing a conventional technique. 2...Cylinder, 7A, 7B...Side plate,
8... Cloth supply roll (one roll), 9... Cloth winding reroll (other roll), 10... Washing cloth, 40
...Press roll, 44...Motor (drive mechanism), 100C, 100D-...Power transmission mechanism, 21OA, 2
10B...Air cylinder (pressing means), 301...
Shift lever (switching means).

Claims (1)

[Claims] 1. Pressure that presses or releases the cleaning cloth, which is suspended between a pair of rolls whose ends are supported by side plates and is supplied from one of the rolls, to the outer periphery of the cylinder of the printing press. and a driving means for moving the cleaning cloth relative to the outer periphery of the cylinder, the cylinder cleaning device for a printing press having a pressing roller disposed in the middle of a cleaning path between the pair of rolls. and includes a pressing means for pressing or releasing the pressing roller from the cylinder, a drive mechanism for rotating the pressing roller, and a power transmission mechanism for transmitting the rotation of the pressing roller to either one of the pair of rolls. A cylinder cleaning device for a printing press, comprising: a driving means; and a switching means for switching transmission of rotation to either one of the pair of rolls. 2. Claim 1, wherein the drive mechanism includes a motor built into the pressing roller and rotating the pressing roller.
Cylinder cleaning device for the printing press described. 3. The cylinder cleaning device for a printing press according to claim 2, wherein the drive mechanism is a motor having forward and reverse functions. 4. A claim characterized in that the power transmission mechanism consists of a driving part fixed to the shaft of the pressure roller, and a driven part engaged with the driving part and attached to the shaft of each of the pair of rolls. Item 1: A cylinder cleaning device for a printing press according to item 1. 5. The cylinder cleaning device for a printing press according to claim 1, wherein the transmission section has a slip mechanism that winds up or unwinds the cleaning cloth onto one of the pair of rolls without slack. 6. Switching the rotation to one of the pair of rolls by a switching means, winding the cleaning cloth onto one roll to clean the cylinder, and then rewinding the cleaning cloth onto the other roll. The method of cleaning a cylinder of a printing press according to claim 1.