JPH0425335Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is an ink roller cleaning device that cleans ink etc. adhering to the ink roller group of a printing machine, and more specifically, the water font support part is The present invention relates to an ink roller cleaning device that supplies cleaning liquid only when the ink roller is retracted from the lower part of the ink roller.

(Prior Art) An ink roller cleaning device for a printing press is known in which a cleaning liquid in a cleaning liquid supply tank is pumped up by an electric pump and dropped onto a group of ink rollers to clean the group of ink rollers.

Conventionally, in the case of this type of cleaning device, the electric pump was controlled so as not to operate even if the pump switch was pressed during the normal printing process, whether the printing machine was in automatic mode or manual mode.

(Problem that the invention aims to solve) However, if the pump switch is pressed by mistake during manual idling, the above-mentioned control will not be carried out, and the cleaning liquid will flow out to the ink roller group, or the cleaning liquid will flow into the dampening liquid of the water fountain. There was a possibility of contamination with dissolved ink.

For this reason, a method was devised to prevent the pump switch from being pressed by mistake by making the pump switch a hidden switch, although this would reduce operability.

The purpose of the present invention is to detect when the water font support section is retracted from the lower part of the ink roller group, and to prevent the pump switch from operating even during normal printing processes, except when the retraction is detected. To provide an ink roller cleaning device for a printing press that prevents cleaning liquid from flowing out onto a group of ink rollers and mixing of cleaning liquid and the like into a water tray when a manual idles.

(Means for Solving the Problems) In order to achieve the above object, the ink roller cleaning device for a printing press according to the present invention has the following features: an ink supply section is located above a water supply section;
Idling was confirmed in the ink roller cleaning device of an offset printing machine that guides ink supplied from the ink supply section and water supplied from the water supply section to the master cylinder via a group of rollers driven by the drive section. an idling confirmation sensor that confirms that the water supply section is retracting from below the roller group; and an evacuation detector that detects that the water supply section is retracting from below the roller group; a pump drive switch that is closed when the pump is idling; a pump that pumps up cleaning liquid when the pump drive switch is pressed; a shower pipe that drips the cleaning liquid pumped up by the pump onto the roller group; a retraction detector that detects and outputs that the water supply section has retracted from below the roller group; and a retraction detector that prohibits driving of the pump when the retraction detector does not detect retraction even if the water supply section is idling. The cleaning control unit is also provided with a cleaning control unit.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

1 and 2 are diagrams showing an embodiment of the ink roller cleaning device for a printing press according to the present invention, with FIG. 1 showing the state during printing and FIG. 2 showing the state during cleaning, respectively. be.

Ink 2 from the ink font 1 is deposited on the surface of an ink font roller 3 that is driven intermittently, and is supplied to a leveling roller 5 by an ink duct roller 4 that is swingably supported. The ink uniformly adhered to the leveling roller 5 is supplied to the vibrating roller 8 via the oscillating roller 6. Vibrate roller 8 is
This roller is used for mixing ink, and rotates while swinging in the longitudinal direction of the roller.

Water accumulated in the water bottle 20 is supplied to a water tray 19 placed on a water tray stand 18. The water font roller 13 is partially immersed in a water tray 19, and the water adhering to the surface of the water font roller 13 is supplied to the vibrating roller 8 by the water duct roller 12. The ink 2 and water supplied to the vibrating roller 8 are supplied to the master cylinder 11 by an upper form roller 9 and a lower form roller 10 during printing. Note that the arrow attached to each roller indicates the rotation direction of the roller during printing.

The cleaning liquid in the cleaning liquid supply tank 37 is supplied to the shower pipe 34 via a hose by a pump 33 that is driven by turning on the pump switch 32. The shower pipe 34 is arranged above the leveling roller 5.

The pipe hole diameter, shower hole diameter, number, arrangement, etc. of the shower pipe 34 are taken into consideration so that the pump pressure and the cleaning liquid can be supplied in an appropriate amount over the entire shower pipe 34 and leveling roller 5. If the shower pipe 34 is installed horizontally, even if the pump switch 32 is turned off and ink cleaning is completed, there is a risk that the liquid remaining in the pipe will fall onto the roller group during the subsequent printing process. For this reason, the pipe is installed at an angle, and any remaining liquid that falls is transmitted along the pipe surface and is placed on the upper drip-proof cover 15 below the pipe end surface.
It is designed so that it will fall.

The installation position of the shower pipe 34 is as follows:
Preferably on a roller as far away as possible from the doctor blade 27 and at the top of the roller group. In this embodiment, it may be placed above the oscillating rollers 6 and 7, but since these two rollers are designed to be easily removable, they are provided on the leveling roller 5 so as not to interfere with this. .

The upper drip-proof cover 15 is arranged above a position that covers the water bottle 20 and the water tray 19. Upper drip-proof cover 1
Reference numeral 5 denotes a cleaning liquid that prevents the inside of the device from being contaminated due to leakage of ink 2 from the ink fountain 1 during printing (position shown in Figure 1), and is dripped from the shower pipe 34 during cleaning (position shown in Figure 2). This is provided to prevent cleaning liquid and the like from being mixed into the water in the water tray 19 due to scattering. The lower drip-proof cover 16 is provided below each roller 3-14. The drip-proof cover 16 is provided to collect the cleaning liquid, ink 2, etc. after cleaning. The recovered cleaning liquid and the like are led to a recovery tank 38. The cleaning liquid, ink stains, etc. dissolved and floating on the roller group are collected by the doctor blade 27, dripped onto the lower drip-proof cover 16, and collected into the collection tank 38. In addition,
Dirt that has scattered and fallen onto the upper drip-proof cover 15 also drips onto the lower drip-proof cover 16 and is similarly collected in the collection tank 38. Further, when cleaning the ink roller, by setting a water amount adjustment knob (not shown) to the maximum value, the water duct roller 12 stops swinging on the d side, allowing more efficient cleaning.

Next, the water tray retracting means will be explained along with its operation. When the handle 35 is pulled to the left in FIG.
only rotates. The swinging side plate 17 is connected to the swinging lever 2
It is supported by shafts 24a and 25a of 4 and 25,
Corresponding to the rotation of the swing levers 24 and 25, it descends while remaining horizontal. The guide pin of the water tray stand 18 is inserted into the elongated hole of the swinging side plate 17, and the water plate 19 and the water bottle 20 are placed on the water plate stand 18, so that the swinging side plate 17 can be lowered. Water dish 19
is separated from the water font roller 13. Next, when the handle 36 is pulled to the left, the water tray stand 18, together with the water tray 19 and water bottle 20, moves to the left by the length of the long hole in the swinging side plate 17, as shown in FIG. .

Further, when the handle 35 is pushed to the right, the swing levers 24 and 25 rotate counterclockwise by an angle θ until they come into contact with the stopper 23, and the swing side plate 17, water tray stand 18, water tray 19, and The bins 20 rise together while remaining horizontal.

In the state shown in FIG. 2, since the water tray stand 18 and the water tray 19 are retracted from below the water font roller 4, when the ink inductor lever 26 is pushed, the doctor blade 27 comes into contact with the water font roller 13.

Next, the configuration and operation of the cleaning control section of the ink roller cleaning device according to the present invention will be explained in more detail.

Fig. 3 is a block diagram showing an embodiment of the control circuit of the ink roller cleaning device according to the present invention, Fig. 4 is a diagram showing an embodiment of the idling confirmation sensor, and Fig. 5 shows the CPU of the control circuit. 2 is a flowchart for explaining the operation of FIG.

In Fig. 3, 31 is a retraction sensor, 32 is a pump switch, 40 is a power switch, 41 is an auto/manual changeover switch, 42 is a start switch, 43 is an idling confirmation sensor, and 44 is an I/O
45 is a CPU, 46 is a memory, 47 is a drive motor, and 48 is a pump motor.

The retraction sensor 31 is composed of a magnet 30 and a proximity sensor 30a, as shown in FIG. 1B. A magnet 30 is provided on the side surface of the water dish stand 18, and a proximity sensor 30a is provided on the side plate of the main body. The evacuation sensor 31 is connected to the water tray stand 1
8. This is for detecting that the water fountain part such as the water tray 19 has retreated from around the roller group.
The proximity sensor 30a that constitutes the evacuation sensor 31 is
When the magnet 30 is far away as shown in Fig. 1, it is off, and as shown in Fig. 2, the magnet 30 is off.
When the water font approaches, it turns on and outputs a water font evacuation signal.

The idle rotation confirmation sensor 43, as shown in FIG.
A micro switch 4 that is turned on and off by a first cam 51 and a second cam 52 provided on a support shaft 50
3a and two stacked micro switches 43b,
43c.

Next, referring mainly to FIG. 5, the overall operation of the ink roller cleaning device for a printing press according to the present invention will be described.

10 when the power switch 40 of the printing press is turned on.
1. The auto/manual changeover switch 41 automatically selects the auto mode (102), and when in this auto mode (103), when the start switch 42 is turned on (104), the operation of the auto routine 200 is automatically started.

The operation of this autoroutine 200 is that plate feeding is automatically started, etching, inking, and transfer are performed a set number of times, and when the set number of sheets have been printed, plate discharge,
This refers to a series of operations in which blanket cleaning, drying, and interleaving operations are automatically performed and the printing press is stopped.

The auto/manual changeover switch 41 is turned on (102, 103), the automatic mode is switched to the manual mode (105), and when it is determined that the start switch 42 is turned on (106), the drive motor 47 is driven (107).

When the drive motor 47 rotates, the support shaft 50 shown in FIG.
The pawl mechanism rotates clockwise to reach the state shown in FIG. is released and the idle state is maintained. In addition, Fig. 4c shows the fleshing and
Indicates the state at the time of printing.

Only when the idling confirmation sensor 43 is on (108) and the retraction sensor 31 is on (109), when the pump switch 32 is turned on (110), the pump motor 48 is driven (111).

108 when the idling confirmation sensor 43 is off;
perform other operations 112; Other operations are
Refers to operations such as plate feeding, inking, printing, plate ejecting, single sheet feeding, and blanket cleaning that operate only in manual mode.

In this way, on the condition that the evacuation sensor 31 is outputting the water font part evacuation signal and the idling confirmation sensor 43 confirms that the printing press is idling, the swinging of the ink duct roller 4 is stopped. The water duct roller 13 is put into a swinging state, and the pump switch 3
2 becomes ready for reception. At this time, when the pump switch 32 is turned on as described above, the pump motor 48 is driven, and the cleaning liquid in the cleaning liquid supply tank 37 is pumped up by the pump 33, and is transferred from the shower pipe 34 onto the leveling roller 5 via the hose. dripped. Pump 33 operates only while pump switch 32 is pressed and supplies cleaning fluid onto the rollers.

(Effects of the invention) As explained in detail above, according to the invention,
A retraction sensor is provided to detect when the water font head is retracted from the lower part of the ink roller group, and cleaning liquid is supplied only when the water font head is retracted. It is possible to effectively prevent accidents where ink gets mixed into the dampening liquid of the parts.

[Brief explanation of drawings]

1 and 2 are diagrams showing an embodiment of the ink roller cleaning device for a printing press according to the present invention, with FIG. 1 showing the state during printing and FIG. 2 showing the state during cleaning, respectively. be. FIG. 3 is a block diagram showing an embodiment of the control circuit of the ink roller cleaning device according to the present invention, FIG. 4 is a diagram showing an embodiment of the idling confirmation sensor, and FIG. 5 is a block diagram showing the CPU of the control circuit. 2 is a flowchart for explaining the operation of FIG. 1... Ink fountain, 2... Ink, 3...
... Ink fountain roller, 4 ... Ink duct roller, 5 ... Leveling roller, 6, 7 ... Oscillating roller, 8 ... Vibrating roller, 9 ... Upper form roller, 10 ... Lower form roller , 11...master cylinder, 12...
Water duct roller, 13...Water font roller,
14... Bailing roller, 15... Upper drip-proof cover, 16... Lower drip-proof cover, 17... Swinging side plate,
18... Water dish stand, 19... Water dish, 20... Water bottle, 21... Support shaft, 22... Support shaft, 23... Stopper, 24... Swing lever, 25... Swing lever, 26... Ink duct lever, 27... Doctor blade, 28, 29... Spring, 30... Magnet, 30a... Proximity sensor, 31... Evacuation sensor, 32... Pump switch, 33... Pump, 34... ... Shower pipe, 35, 36 ... Handle, 37 ... Cleaning supply tank, 38 ... Recovery tank, 40 ... Power switch, 41 ... Auto/manual changeover switch, 42 ... Start switch, 43 ... Drop check Sensor, 44...I/O
Device, 45...CPU, 46...Memory, 47...
...Drive motor, 48...Pump motor, 50...
Support shaft, 51, 52...cam.

Claims (1)

[Scope of claim for utility model registration] The ink supply section is located above the water supply section,
Idling was confirmed in the ink roller cleaning device of an offset printing machine that guides ink supplied from the ink supply section and water supplied from the water supply section to the master cylinder via a group of rollers driven by the drive section. an idling confirmation sensor that detects that the water supply section is retracted from below the roller group; a pump drive switch that is closed when the idling occurs; and a pump drive switch that is closed when the pump drive switch is pressed. a shower pipe that drips the cleaning liquid pumped up by the pump onto the roller group; and a retraction detector that detects and outputs when the water supply section is retracted from below the roller group. An ink roller cleaning device for a printing press, comprising: a cleaning control unit that prohibits driving of the pump when the retraction detector does not detect evacuation even when the ink roller is idling. .