JPH0464509B2 - - Google Patents

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. 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 second cylinder automatic cleaning device of a printing press
Generally, the roll drive mechanism is to drive the winding roll by transmitting the rotation of an external motor to the winding core, or to convert the operation of an actuator such as an air cylinder into rotational movement of the winding core to wind the cleaning cloth. A mechanism is used to take (Refer to Japanese Patent Publication No. 56-37069.) In FIG. 10, a pair of side plates 7A and 7B connected to frames (not shown) on both sides of the printing press body are connected to a pair of rolls, such as cloth supply rolls 8. A cloth take-up roll 9 is supported in parallel and rotatably. and these rolls 8
and 9 have respective ends of a belt-shaped cleaning cloth 10 wrapped around them, and are given a predetermined tension. A timing pulley 34 is attached to one shaft end of the cloth winding roll 9, and is driven to rotate at a predetermined speed by a motor 31 with a reduction gear via a timing belt 33. A stay 11 having a substantially T-shaped cross section is provided between the cloth supply roll 8 and the cloth winding roll 9 in parallel to their axial direction (longitudinal direction), and both ends of the stay 11 are connected to side plates 7A.
and 7B. A hollow chamber 13 is provided in a portion of the stay 11 facing the blanket body 2 in parallel with the cloth supply roll 8 and cloth take-up roll 9, and a pressure pad 12 formed of an elastic material is provided on the surface facing the blanket body 2. It is being arranged. 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 10 that moves while sliding on the outer surface of the pressure pad 12 is placed in the blanket. It is configured to press against the barrel 2. During this time, the surface of the blanket wound around the blanket body 2 is wiped clean. Since the driving means for the cloth winding roll protrudes outside the main body of the cleaning device, the installation area for the cleaning device is large, and the cylinders, rollers, drive device, etc. of the printing press have space inside the frame of the printing press. If the cylinder cleaning device is not installed, it may be difficult to install the cylinder cleaning device due to space constraints.

In addition, the motor used to drive the core of conventional cloth winding rolls is a forward-rotating constant-speed motor with a reduction gear, and the cloth supply roll can be rewound by hand after cleaning. I was rewinding it in reverse. Furthermore, since the rotational speed of the cloth take-up roll is not variable, the cleaning cloth feed speed increases as the diameter of the cloth take-up roll increases, resulting in problems such as unnecessarily large consumption of cleaning cloth. It was hot.

[Problem to be solved by the invention]

In the case of conventional printing press cylinder cleaning devices,
The entire device is large and difficult to install inside the frame of the printing press, and it takes time and effort to rewind the cleaning cloth. Furthermore, 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.

The purpose of the present invention is to provide a compact structure that can be installed within the limited space of a printing press, and also to facilitate unwinding of the cleaning cloth, and to change the rotational speed of the cloth winding roll to improve the speed during the cleaning process. 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 cloth winding roll.

[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. The cleaning cloth is suspended between a pair of rolls whose ends are supported by a side plate that presses against or separates from the outer periphery of the cylinder of the printing press, and the cleaning cloth supplied from one roll is pressed against or removed from the outer periphery of the cylinder of the printing press. a pressing means having a pressing roller to be released; a driving means for moving the cleaning cloth relative to the outer periphery of the cylinder; a driving mechanism for rotating the pressing roller;
In a cylinder cleaning device for a printing press, the drive mechanism is equipped with a power transmission mechanism that transmits the rotation of the pressure roller to either one of the pair of rolls, and a switching means that switches transmission of the rotation to either one of the pair of rolls. The power transmission mechanism includes a motor built into the pressure roller and having a forward and reverse function for rotating the pressure roller. The driven part is configured to have a slip mechanism for winding or unwinding the cleaning cloth onto or from one of the pair of rolls without slack. That is, 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.

Further, the power transmission mechanism includes a timing pulley fixed to the shaft of the pressure roller, a transmission part attached to the shaft of each of the pair of rolls, and a transmission part suspended between each transmission part 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 a movable tightening handle. 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, and 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.
an annular ring that engages with a recess in the friction disk;
It has a structure consisting of bolts and nuts that rotatably hold the ring on the shift lever.

An elongated hole in the axial direction is bored at one end of the link, and a clamp screw is provided to support the link on the side plate via the elongated hole.

Further, the transmission section has a slip mechanism for winding up or rewinding the cleaning cloth onto or back from the second roll or the first roll without slack.

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 either 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 by moving and press-bonding the friction disk provided in the movable friction disk with the movable friction disk.

Then, the rotation of one of the rolls is switched by the switching means, the cleaning cloth is wound around 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, by switching the power transmission mechanism provided in the cylinder cleaning device of the printing press, the rotation of the pressing roller is transmitted to one roll (fabric supply roll) or the other roll (fabric winding roll) via the power transmission mechanism. ). By operating the shift lever, rotation is transmitted to one of the rolls via the friction disk.
In the cleaning process, the other roll rotates to feed the cleaning cloth relative to the shaft, and the cleaning cloth is wound up without slack due to the slip phenomenon between the two 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, and the rotation is reversed to unwind the cleaning cloth.

〔Example〕

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

As shown in FIGS. 1 to 4, the cylinder 2
A pair of rolls, such as a cloth supply roll 8 and a cloth take-up roll 9, whose respective ends are rotatably supported by a pair of side plates 7A and 7B attached to the machine frames 201A and 201B at both ends of the
a pressing means for pressing or releasing a belt-shaped cleaning cloth 10 supplied from one of the rolls, for example cloth supply roll 8, against the outer periphery of the cylinder; In a cylinder cleaning device for a printing press, which is equipped with a driving means for the other roll to be moved relative to each other, for example, a cloth take-up roll 9, a pressure roller 40 is provided in the middle of the cleaning path between the cloth supply roll 8 and the cloth take-up roll 9. a pressing means that presses or separates the pressing roller 40 from the cylinder 2 to press or separate the cleaning cloth 10, which is placed around the surface of the pressing roller 40 facing the cylinder 2;
The pressure roller 4 is disposed inside the pressure roller 40.
The cleaning cloth 10 is moved to the cylinder 2 by driving the
The rotation of the drive mechanism (motor) 44 and the pressure roller 40 that move the drive mechanism (motor) relative to the outer circumference of the first roll 8
Alternatively, it is configured to include a driving means comprising a power transmission mechanism incorporating a slip mechanism for transmitting transmission to the second roll 9, and a switching means for switching transmission of rotation to the cloth supply roll 8 or the cloth winding roll 9.

In the embodiment shown in FIGS. 1 and 2, the pressing means is a stud 202A or 202B (hereinafter referred to as A or B) that rotatably supports one end of the side plate 7A or 7B on the machine frame 201A or 201B. Components with the same symbol are combined with each other, for example, the side frame 7.
A is supported by a stand 202A on the machine frame 201A), and a pressing machine that presses or separates the other end of the side plate 7A or 7B from the cylinder 2, and the pressing machine is an air cylinder 210A or 210B, a knuckle 211A or 211B connected to the side plate 7A or 7B of the air cylinder 210A or 210B, 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 driving means includes a motor 44 that is built in the pressure roller 40 and rotates the pressure roller 40, and a motor 44 that rotates the pressure roller 40 and a cloth supply roll 8 or a cloth take-up roll 9. The motor 44 is a power transmission mechanism having a built-in slip mechanism for transmitting power to the respective shaft portions 82A and 92A, and the motor 44 is, for example, a motor of about 0.5 to 50 RPM and has forward and reverse functions. As an example, the internal structure of the pressure roller 40 includes a stator 46 of a motor 44 and a rotor 4 of the motor 44 inside the pressure roller 40.
5 is built-in, and the stator 46 is integrally fixed to the inner wall of the pressing 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 via a conductive wire 58 wired from the outside through a hollow portion at the center of the shaft portion 42B fixed to the side plate 7B.

The output shaft 53 of the motor 44 is engaged with a reduction gear 55 through a joint 54, and a shaft 56 of the reduction gear 55 is connected through a joint 57 to the coaxial shaft portion 42A.

Both ends of the shaft portions 42A and 42B are press rollers 40.
It is supported inside by bearings 43A and 43B, but is fixed on side plates 7A and 7B.

When power is supplied to the motor 44, the pressing roller 40 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, and shaft portions 82A and 92A of the cloth supply roll 8 and cloth winding roll 9, respectively. It is composed of attached transmission parts 100C and 100D, and a timing belt 120 suspended between the transmission parts 100C and 100D and the timing pulley 101, and the transmission part 100C
and 100D refer to a pulley 102C or 102D on which the timing belt 120 is suspended, and a flick that is fixed to the pulley 102C or 102D, has a liner 104C or 104D fixed to the other end surface, and is rotatably attached to the shaft portion 82A or 92A. Shion disk 103C or 103D (hereinafter referred to as C
Or, for the members with the symbol D, members with the same symbol are assembled on one shaft part. For example, the transmission part 100C is assembled with the pulley 102C and the liner 104.
A friction disk 103C which is fixed to C and freely attached to the shaft portion 82A, and a liner 107C opposite to the liner 104C or 104D.
or a movable friction disk 106C or 106D that fixes the friction disk 107D and engages the respective shaft portion 82A or 92A in the rotating direction, and a threaded portion of the respective shaft portion 82 or 92A facing the friction disk 106C or 106D. The structure consists of a tightening handle 108C or 108D screwed onto the moving friction disk 108C or 108D, and a spring 109C or 109D provided between the tightening handle 108C or 108D and the movable friction disk 106C or 106D. 10
6C or 106D and each shaft portion 82A or 9
2A is provided with a spline key 110C or 110D that slides in the axial direction but engages in the rotational direction.

Then, a cloth supply roll 8 and a cloth winding roll 9
A switching means is installed to switch the rotation of the link 30, which is swingable in the axial direction (QR direction) and whose one end is supported by the side plate 7A.
4, a shift lever 301 that intersects with the link 304 and is rotatably supported at one end on the other end of the link 304, and a shift lever 301 that maintains the center position of the shift lever 301 and rotatably supports the shift lever 301. This central pin 302
The stay 11 that is screwed on and the frog crotch 307 that engages with the movable friction disk 106C or 106D
C or 307D, with frog crotch 30
7C or 307D is a semicircular ring that engages with the recess of the movable friction disk 106C or 106D, and a bolt/nut 308C or 308D that rotatably holds this semicircular ring on the shift lever 301.
It consists of 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 supports the link 304 on the side plate 7A through the elongated hole 305.
is provided.

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 section 100C or 100D is connected to the cleaning cloth 1.
It has a slip mechanism using friction disks 103D and 106D that winds up or rewinds the cloth by the fed length onto the cloth supply roll 8 or the cloth winding roll 9 without slack.

Next, the operation of the present invention will be explained.

As shown in FIGS. 1 and 2, the drive of the cloth winding roll 9 is freely transmitted to one shaft portion 92A.A friction disk 103D integrated with a pulley 102D is connected to a moving friction disk 103D that is integral with the pulley 102D. When the disk 106D is shifted in the direction of arrow J, that is, the shift lever 301 is shifted in the direction of arrow I, the pulley 102 is coupled to the shaft portion 92A of the cloth winding roll 9 via the friction disk 103D and the movable friction disk 106D. , the rotation of the pressure roll 40 is transmitted to the cloth take-up roll 9. In this case, since there is some play between the groove width of the movable friction disk 106D and the width of the frog crotch 307D, the friction disk 1
By adjusting the tightening pressure between the pulley 102D and the movable friction disk 106D using the tightening handle 108D, the rotation of the pulley 102D 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 roll.

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 non-fabric 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 pressing roller 40 has shaft portions 42A and 42B held by side plates 7A and 7B, respectively, and the side plates 7A and 7B are attached to the machine frame 2.
01A, 201B with studs 202A, 202B
It is rotatably suspended through the. 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 urged in the backward direction by a control device (not shown), that is, in the direction of arrow F shown in FIG.
The pressure roller 40 is separated from the surface of the cylinder 2. When cleaning next, use air cylinder 2.
10A and 210B are urged in the direction in which the rod moves forward, 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.

During cleaning, as shown in Figures 6 and 7,
The cleaning cloth 10 is fed out from the cloth supply roll 8 by the forward rotation of the pressure roller 40 and wound onto the cloth take-up roll 9. To create this state, the shift lever 301 is shifted in the direction of arrow I shown in FIG. If it is in the direction, the 6th
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 friction disk 106C of the cloth winding roll 9 is connected to the pulley 102.
It is pressed against the friction disk 103D on the D side and driven by the timing belt 120, and the cloth winding roll 9 is driven. In this case, the movable friction disk 106C and the fixed side friction disk 103C are connected to each liner 107C.
and 104C are only pressed together by spring 109C, so that a slight slip occurs.
Therefore, the cloth winding roll 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 motor is provided in the cylinder cleaning device of a printing press, and the rotation of the pair of rolls is switched by a power transmission mechanism having a slip mechanism, so that the device has a compact structure, and Winding and unwinding of the cleaning cloth can be done easily and without slack, and by controlling the rotation of the pressure roller, the feeding speed of the cleaning cloth can be kept constant regardless of changes in the diameter of the winding roll. It became possible.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of the present invention;
Figure 2 is a sectional view taken along line 1 in Figure 1, Figure 3 is a sectional view taken along line 1 in Figure 1, and Figure 4 is a sectional view taken along line 1 in Figure 1.
5 is a sectional view of a drive mechanism showing another embodiment of the present invention, FIG. 6 is a side view illustrating the cleaning cloth winding operation of the present invention, and FIG. 6 is a partially omitted line cross-sectional view, FIG. 8 is a side view illustrating the cleaning cloth rewinding operation of the present invention, and FIG. 9 is a partially omitted line cross-sectional view of FIG.
FIG. 0 is a perspective view showing a conventional technique. 2... Cylinder, 7A, 7B... Side plate, 8... Cloth supply roll (one roll), 9...
... Cloth winding roll (other roll), 10 ... Cleaning cloth, 40 ... Press roll, 44 ... Motor (drive mechanism), 100C, 100D ... Power transmission mechanism,
210A, 210B...Air cylinder (pressing means), 301...Shift lever (switching means).

Claims (1)

[Claims] 1. A pressing roller that is suspended between a pair of rolls whose ends are supported by a side plate, and that presses or releases the cleaning cloth supplied from one of the rolls onto the outer periphery of a cylinder of a printing press. a driving means for moving the cleaning cloth relative to the outer periphery of the cylinder; a driving mechanism for rotating the pressing roller; and a driving mechanism for rotating the pressing roller by either one of the pair of rolls. In the cylinder cleaning device for a printing press, the drive mechanism is built in the pressure roller and includes a switching means for switching transmission of rotation to either one of the pair of rolls. Equipped with a motor with forward and reverse functions to rotate the pressure roller,
The power transmission mechanism includes a driving part fixed to the shaft of the pressing roller, and a driven part engaged with the driving part and attached to the shaft of each of the pair of rolls. A cylinder cleaning device for a printing press, characterized in that it has a slip mechanism that winds up or unwinds the cleaning cloth on either one of the pair of rolls without slack. 2 Using the cylinder cleaning device for a printing press as set forth in claim 1, the rotation is switched to one of the pair of rolls, a cleaning cloth is wound around one of the rolls to clean the cylinder, and then the above-mentioned A method for cleaning a cylinder of a printing press, characterized in that the cleaning cloth is rewound onto the other roll, and the unwinding is performed without slack due to slips generated in a slip mechanism.