JPH0446758B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dust removal device for a plate cylinder in a printing press.

(Prior Art) Conventionally, according to Japanese Patent Application Laid-Open No. 174362/1983, a dust removal head member that rotates at a constant angle is attached to a device that moves on a rail provided parallel to the axial direction of the plate cylinder. A dust removal device has been disclosed in which the outer periphery of a dust removal head member is automatically controlled by electrical signals so that it comes into contact with the plate cylinder surface. A dust removal device is disclosed in which an automatic self-cleaning device configured to spray a cleaning liquid and discharge the sprayed cleaning liquid from a drain is provided at one end of a guide rail of a doctor.

(Problem to be Solved by the Invention) In the former described in the above-mentioned conventional technology, it is necessary to replace the dust removal head member with a new one when it rotates once and its entire periphery becomes dirty, and the time required for this replacement is The target loss was huge.

In addition, the latter requires incidental equipment such as a cleaning liquid injection device, a discharge device, and a scattering prevention device, and the doctor must travel back and forth to the automatic self-cleaning device each time the doctor is cleaned.

The present invention provides a device for eliminating the need to replace the dust removal head with a new one unless the dust removal head member is damaged to the point that it cannot be used, a device for eliminating the need to spray cleaning liquid, and a dust removal head. To provide a new dust removal device for a plate cylinder that is devised so that members can be cleaned on the spot.

(Means for Solving the Problems) In order to achieve the above object, a dust removal device for a plate cylinder according to the present invention includes a left-right moving device that can be freely displaced parallel to the plate cylinder, and a plate cylinder equipped with a left-right moving device. A disk-shaped dust removal device made of a hard rubber-like elastic material is provided with a back-and-forth moving device that can freely move near and far, and a disk-shaped dust removal device made of a hard rubber-like elastic material, which is provided on the back-and-forth moving device so that its outer periphery touches the printing plate when it moves forward and rotates by a predetermined angle when it retreats. a head member, an upper cleaning tool containing an ink dissolving solution, which is provided in a state in which the upper surface of the plate surface contacting part of the disc-shaped dust removal head member rotates in contact with the back-and-forth moving device; A lower cleaning tool containing an ink dissolving solution is provided so as to be rotated in contact with the lower surface of the plate surface contacting part of the member.

(Example) and (effect) Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the overall configuration of a printing press, in which 1 is a plate cylinder, 2 is an ink ruler with an ink amount adjustment mechanism such as an ink key, 3 is a dampening water device, and 4 is a dust removal device. There is also a color table 5, on which printed matter is placed and checked, and a table 6 is equipped with switches and the like for controlling necessary color adjustments and the like.

FIG. 2 shows details of the color booth 5. In other words, the top of the table 6 is the place where printed matter is placed, and the width (or width) direction is usually 20 mm.
Divide the 40th vertical area 7 by drawing a vertical line, and use serial numbers (No. 1, 2, 3, etc.) to identify each area 7.
...20) is established. The width of one zone 7 is currently about 35 m/m, which is determined based on the performance of the device, practical experience, etc. In front of each zone 7, there is a row of pushbutton switches 9 and 10 with numbers corresponding to each zone 7, 9 being an ink increase operation switch, and 10 being an ink decrease operation switch. Furthermore, between the operation switch rows 9 and 10 and the zone 7, there are eight rows of LED display boards that also display the rate of ink increase/decrease for each zone. Although the basic part of the color tone adjustment of printed matter is automatically performed, the final fine adjustment is performed on the color table 5 by operating the above-mentioned ink increase/decrease operation switch.

That is, place the printed matter on the stand 6 and check it. If, for example, there is a poor color tone within the width of area No. 5, press the No. If you perform an increase or decrease operation while looking at the basic color tone (the basic tone is already displayed), this signal will operate the divided ink keys (not shown) corresponding to each area to increase or decrease the amount of ink. The color tone will be adjusted by increasing or decreasing.

Further, the present invention automatically operates the dust removal device by utilizing the above-mentioned area 7 identification function and the electric signal generation function by the ink increase/decrease operation switch corresponding to the area 7. That is, when performing the dust removal operation, first switch the changeover switch 11 on the right end of the color booth to the "dust removal side", and from this, the push button in the 9 rows of ink increase operation switches will be switched to the "garbage location signal switch". It has been made.
In other words, when you find a hit key in a printed matter placed on the color booth, you can identify the area number corresponding to the location of the hit key by identifying area 7 using the vertical line on the stand, just as you would when adjusting the color. However, when the ink increase operation switch located in front of the identified area is pressed, this signal automatically performs dust removal through the signal processing shown in FIG.

FIG. 3 will be explained. As mentioned above, when the switch 11 at the location of the hit key is pressed, the input conversion section 12 converts it into a necessary location signal, which is input to the control section 13 and processed by the CPU 14 to drive the dust removal device 4. It is converted into a signal (for example, the number of pulses, etc.) to control the motor, solenoid, etc. 15 necessary to automatically control the dust removal device 4.

Next, details of the dust removal device 4 will be explained with reference to FIGS. 4 to 6. 1 in the figure is the plate cylinder,
A guide rail 17 is installed in the width direction, and a driving stepping motor 16 for moving the dust removal device 4 left and right in boxes 18 at both ends and a dust removal head member 20 are moved forward and backward relative to the plate cylinder 1. A driving air cylinder device (not shown) is built-in. The dust removal head member 20 has both side head parts 19 and 1 made of hard rubber-like elastic material.
It is a rectangular plate with a rounded 9′. The width of the tip of the head portions 19, 19' is equal to the width of the vertical area 7 of the color booth 5 (or the width of the divided ink key for controlling the amount of ink), and covers the entire vertical area where dirt is present. It is sized to cover. Further, reference numeral 21 denotes a cleaning device for immediately cleaning ink, dirt, etc. attached to the head portions 19, 19' of the dust removal head member 20. One of the features of the present invention is that the head member 20 and the cleaning device 21
It is in.

That is, in response to the above-mentioned garbage location confirmation and garbage removal signal, the drive motor is activated and the garbage removal device 4 is moved to the area where the garbage is located, and then the garbage removal head member 20 is moved to the cleaning device 2 by the force of the air cylinder.
1 and moves forward toward the plate cylinder 1 and stops at a position where one head portion contacts the plate surface. Note that this stop position is adjusted in advance by a fine adjustment mechanism so that the stop position is at an optimum position. Since plate cylinder 1 is rotating,
Dust is removed by the relative movement with the head and is scraped onto the head along with the ink. After a certain contact time, the head member 20 is withdrawn from the plate cylinder 1. During this retraction, the head 20 is rotated 180 degrees by a gear and a ratchet mechanism (described later) provided on the underside of the head member 20, and the head with ink and dirt is replaced with the clean head.
The rear head is always clean and ready for the next removal operation.

During this 180° rotation, as shown in FIG. 5, the dirty ink and dirt in the head parts 19 and 19' are removed by dissolving the ink in the cleaning device 21. Contains fibrous 2
It is wiped clean by passing between the cleaning tools 22 at a constant speed. Furthermore, the cleaning device 21 includes a pot 2 made of sponge containing a filling 52 for suctioning and storing the ink solution for storing the ink solution.
3, there is a replenishment hole 24 that allows ink solution to constantly soak into the cleaning tool 22 from this pot 23, and the part of the outer surface of the cleaning tool 22 that does not hold the removal head member is treated with chemicals or the like to make the surface non-volatile, so that it can last for a long time. It is designed to maintain its cleaning function over a long period of time.

Furthermore, as shown in FIG. 6, there is a copper scraper 25 on the side of the cleaning tool 22, and this scraper 25 scrapes off dust and ink adhering to the cleaning surface of the cleaning tool 22 to clean the same surface. A dirt receiving groove 26 is provided as a means for temporarily storing scraped dirt and ink scum to maintain the long-term cleaning function of the cleaning tool 22. In this manner, immediately after removing dust, the dust removal device 4 replaces the clean side of the dust removal head member to complete the preparation for the next work, and at the same time, the dirty side of the dust removal head member is cleaned by the cleaning tool 22, which dissolves ink and removes ink. The cleaning function is maintained for a long period of time by scraping off dirt, etc. Furthermore, when it is desired to replace the cleaning tool 22, the cap 27 can be removed by removing four setscrews, so that the cleaning tool 22 can be easily replaced.

In the figure, 29 is a spline shaft, 30 is a screw screw, 31 is a chain, 32 is a pinion that rotates forward and backward by an air cylinder device (not shown),
33 is a rack, 34 is a joint pawl, 35 is a slot, 36 is a left and right moving base, 37 is a back and forth moving base, 38 is a 180 degree reversal ratchet, 39 is a feed pawl, 40 is a return spring, 41 is a stopper latch, 42 is a stopper pawl, 43 is a large diameter gear, 4
4 is an intermediate gear, 45 is a small diameter gear, 46 is a bearing bracket, 47 is a forward/backward adjustment bolt, 48 is a fixing nut, 49 is a memory, 50 is a moving wheel, and 51 is a cover.

(Effects of the Invention) The dust removal device for a plate cylinder according to the present invention includes a left-right moving device that can be freely displaced parallel to the plate cylinder as described above;
A back-and-forth moving device that is equipped on the left-right moving device and can freely move near and far toward the printing plate, and a hard device that is installed in the back-and-forth moving device so that its outer periphery contacts the printing plate when the back-and-forth moving device moves forward, and rotates by a predetermined angle when it retreats. a disk-shaped dust removal head member made of a rubber-like elastic material; an upper cleaning tool containing an ink dissolving liquid, which is provided in a state in which the upper surface of the plate surface contacting part of the disk-shaped dust removal head member rotates in contact with the back-and-forth moving device; The apparatus is characterized in that the back-and-forth moving device has a lower cleaning tool containing an ink dissolving solution, which is provided in a rotating state in contact with the lower surface of the plate surface contacting part of the disk-shaped dust removal head member. A device that eliminates the need to replace the dust removal head with a new one unless the removal head member is damaged to the point that it cannot be used;
The present invention achieves excellent effects by making it possible to eliminate the need for spraying cleaning liquid and by making it possible to clean the dust removal head member on the spot.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a schematic side view of the whole, the second figure is a perspective view of the color booth,
Figure 3 is a block diagram of the dust removal position input and signal generation device, Figure 4 is a perspective view of the dust removal unit, Figure 5 is a side view of the main parts of the dust removal unit, and Figure 6 is a block diagram of the dust removal position input and signal generation device. It is a top view of the same main part. 1... Plate cylinder, 2... Ink roller, 3... Dampening water device, 4... Dust removal device, 5... Color booth, 6
...stand, 7...area, 8...LED display board, 9,
10... Switch, 11... Changeover switch, 12
...Input conversion section, 13...Control section, 14...
CPU, 15...Motor, solenoid, etc., 16...
... Motor, 17 ... Guide rail, 18 ... Box, 19, 19' ... Head part, 20 ... Dust removal head member, 21 ... Cleaning device, 22 ... Cleaning tool, 23 ... Pot, 24 ... ...Supply hole, 25...
Scraper, 26... Receiving groove, 27... Cap, 29... Spline shaft, 30... Screw screw, 31... Chain, 32... Pinion, 3
3...Rack, 34...Joint nail, 35...
Slot, 36...Movement base, 37...Movement base, 38...Reversing ratchet, 39...Feed pawl, 40...Return spring, 41...Stopper latch, 42...Stopper pawl, 43... Large diameter gear, 44... Intermediate gear, 45... Small diameter gear, 46
... Bearing bracket, 47 ... Adjustment bolt, 48
...Natsuto, 49...Memory, 50...Movement wheels, 51...Cover, 52...Padding.

Claims (1)

[Claims] 1. A left-right moving device that can be freely displaced in parallel with the plate cylinder, a back-and-forth moving device equipped on the left-right moving device that can freely move near and far toward the printing plate, and a back-and-forth moving device that has an outer peripheral edge that touches the printing plate when the back and forth moving device moves forward. A disk-shaped dust removal head member made of a hard rubber-like elastic material is provided so as to rotate by a predetermined angle when retracting, and the upper surface of the plate surface contacting part of the disk-shaped dust removal head member is in contact with the back-and-forth movement device and rotates. An upper cleaning tool containing an ink dissolving liquid is provided, and a lower side containing an ink dissolving liquid is provided so that the lower surface of the plate surface contacting part of the disk-shaped dust removal head member rotates in contact with the back-and-forth moving device. A device for removing dust from a plate cylinder, characterized by having a cleaning tool.