JPH0721322Y2 - Plate dust remover for sheet-fed printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is applied to a sheet-fed printing machine when dust such as paper dust or ink residue adheres to the surface of the plate mounted on the peripheral surface of the plate cylinder. The present invention relates to a plate dust removing device for removing dust.

[Conventional technology]

In a sheet-fed printing press, dust such as paper dust and solidified ink residue generated during cutting of paper may adhere to the surface of the plate mounted on the peripheral surface of the plate cylinder and deteriorate the quality of the printed matter. As it exists, it is necessary to remove it between printing operations. Therefore, conventionally, the sheet-fed printing press is provided with a dust removing device for removing this dust.

FIG. 5 is a schematic side view of a printing unit of a sheet-fed printing press provided with a conventional dust removing device of this type. This will be described with reference to FIG. A printing plate 3 is attached to the peripheral surface of
On the surface of this plate 3, the inking roller 5 of the inking device 4,
6 and the swimsuit roller 8 of the water supply device 7 are disposed adjacent to each other so as to be detachable. The inking unit 4 includes inking rollers 5 and 6
Is provided with a swinging roller 9 that is in contact with the swinging roller 9, a roller group such as a detachable kneading roller 10 that is in contact with the swinging roller 9, and an ink fountain (not shown) that stores ink. Further, the water supply device 7 is provided with a roller group such as a swing roller 11 and a detachable rider roller 12 that are in contact with the swimsuit roller 8 and a water boat (not shown) that stores dampening water. Reference numeral 13 is a roller nip pressure adjusting device for the inking device 4, and 14 is a roller nip pressure adjusting device for the water supply device 7.

The front surfaces of the inking device 4 and the water supply device 7 are covered with an upper cover 15 and a lower cover 16, and the upper cover 15 has a widthwise both end portion on the frame 1 side supporting metal fitting.
It is detachably supported by bolts 19,20 on 17,18. The lower cover 16 is pivotally supported by the support member 21 on the frame 1 side so as to be openable and closable.

In the vicinity of the boundary between the upper and lower covers 15 and 16, a holding stay 22 having a substantially square cross section is positioned diagonally below the kneading roller 10 and supported between the left and right frames. The holder 23 is held by the holder so as to be movable in the axial direction. A dust removing bar 25 with a knob 24 formed in a rod shape having a rectangular cross section is inserted into the holder 23 so as to be freely inserted and removed in a direction indicated by an arrow A in the figure.
The rubber doctor 26 at the tip passes through between the kneading roller 10 and the rider roller 12 so as to face the vicinity of the surface of the plate 3 from between both the attaching rollers 5 and 8.

With this configuration, an image is formed by the dampening water and the ink supplied to the surface of the plate 3 by the inking device 4 and the water supply device 7, and this image is transferred to the paper through the blanket cylinder. Printing is applied. When dust such as paper dust or ink residue adheres to the surface of the plate 3, the plate cylinder 2 is rotated at a low speed to grip the knob 24 and move the dust removing bar 25 to the dust attaching position on the holding stay 22. When the doctor 26 is pressed against the surface of the plate 3 while doing so, dust is removed.

Then, when attaching or detaching or adjusting each roller 5, 8, 12,
After removing the dust removal bar 25 in the direction of arrow A, bolts 19 and 2
When loosening 0 and removing the upper cover 15, the upper half of the front surface is opened.
Remove 10 and attach / detach or adjust the inking roller 5.

Next, rotate the lower cover 16 in the direction indicated by the arrow B in the figure,
When opened to the position indicated by the chain line 16A, the front half is opened, and therefore the swimsuit roller 8 and the rider roller 12 are attached / detached or adjusted by inserting a hand from this opening.

[Problems to be solved by the device]

However, in such a conventional dust removing device, the attachment / detachment and adjustment of the inking roller 5 must be performed within the space between the swing roller 9 and the holding stay 22 as described above, and Since the attachment / detachment with the rider roller 12 and the adjustment have to be performed in the space between the swing roller 11 and the holding stay 22, the working space is narrow and the adjusting portion is difficult to see, which makes the work difficult and requires a long time. However, there was a problem that the holding stay 22 got in the way and hit it and hurt the arm.

[Means for Solving the Problems]

In order to solve such a problem, according to the present invention, a plate cylinder that pivotally supports the safety cover frame side that covers the roller peripheral surface of the inking device or the water supply device so as to be openable and closable, and that supports the dust removal bar to be inserted into and removed from the safety cover. The holder that can move in the direction parallel to the body axis is integrally formed.

[Action]

The dust removing bar is moved horizontally while rotating the plate cylinder at a low speed, and the dust removing bar is pushed to push the doctor against the plate surface, whereby the dust is removed. For example, when the safety cover is divided into an upper cover and a lower cover and the holder is provided integrally with the upper cover, when removing or adjusting the roller, pull out the dust removal bar from the holder and then open the upper cover. Also moves up with the top cover,
Then, when the lower cover is opened, the front surface of each roller is opened over a wide area, and the attachment / detachment and adjustment of each roller are easily performed.

〔Example〕

1 to 4 show an embodiment of a dust removing device according to the present invention, FIG. 1 is a side view of a printing unit for carrying out the same, FIG. 2 is a front view of FIG. 1 taken along line II, and FIG. 1 is an enlarged side view of the essential parts of FIG. 1, FIG. 4 (a) is a front view of FIG. 3 showing IV with the dust removing bar inserted, and FIG. 4 (b) is the state with the dust removing bar removed. FIG. 4 is a front view as seen from IV in FIG. 3.
In the figure, the configuration of the plate cylinder, the inking device and the water supply device is the same as that of the conventional device shown in FIG. 5, and therefore the same reference numerals are given and detailed description thereof is omitted. A cover for covering the front surfaces of the inking device 4 and the water supply device 7 is divided into an upper cover 30 and a lower cover 31, and the upper cover 30 is rotatably supported at its upper left and right ends on the upper end of the frame 1. ing.
At the lower end of this upper cover 30, upper and lower parts 2 parallel
The guide bars 32, 33 in a row are arranged side by side at a predetermined interval, and the left and right end portions thereof are fixed to the projecting portions at both ends of a cover plate 34 as the main body of the upper cover 30 with bolts 35. 36 is a plate with two U-shaped plates 37, 38
And a pair of tops 39 sandwiched therebetween and slidably fitted between the upper and lower guide bars 32, 33, which are integrally fixed by a pair of bolts 40.
It is formed so as to be movable in the horizontal direction while sliding 39 along the guide bars 32 and 33. This holder 36 top 39
The same dust removal bar 25 as the conventional one is inserted into and removed from the rectangular hole 41 formed by surrounding the guide bar 32, 33 with the guide bar 32, 33. The bar 25 and the holder 36 are configured to move integrally. A compression coil spring 42 for urging the dust removing bar 25 in the pulling direction is interposed between the knob 24 and the plate 37, and when the dust removing bar 25 is pushed, the elastic force of the compression coil spring 42 is exerted. It is configured to push against. In this way, the upper cover 30 integrally formed with the holder 36 is configured so that it can be opened upward together with the holder 36 in the state where the dust removing bar 25 is removed, as indicated by reference numeral 30A in FIG. Open top cover 30
Are fixed by fixing means (not shown). A limit switch on the upper end of the frame 1, which is pressed by the open upper cover 30 to close the contacts and disable the machine from starting.
43 is fixed.

The lower cover 31 has an upper cover 30 as shown in FIG.
A pair of left and right N-shaped frame bodies 45 engaged in the recesses of the frame 1 and pivotally attached to the inner surface of the frame 1 via brackets 44.
And a cover plate 46 as a cover body are integrally formed, and the lower cover 31 is configured to be openable upward as indicated by reference numeral 31A in FIG.

The operation of the dust removing device configured as above will be described. When dust such as paper dust or ink residue adheres to the surface of the plate 3, the plate cylinder 2 is rotated at a low speed to grip the knob 24 and the dust removing bar 25 together with the holder 36 to guide bar.
After moving to the dust adhering position along 32, 33, when pushing the dust removing bar 25 against the elastic force of the compression coil spring 42,
The doctor 26 is pressed against the surface of the plate 3 to remove dust.

When attaching or detaching the inking roller 5, the swimsuit roller 8, the rider roller 12, etc., the dust removing bar 25 is attached to the holder 36.
After removing the upper cover 30, the upper cover 30 is opened and fixed to the position indicated by reference numeral 30A in FIG. At this time, the holder 36 also moves together with the upper cover 30 and moves upward. Next, when the lower cover 31 is rotated around the pivotal support portion by the bracket 44, the lower cover 31 opens to the state indicated by reference numeral 31A in FIG. In this case, since the lower end of the cover plate 46 of the lower cover 31 is located at the position indicated by the reference numeral 46a in FIG. 1, the front surface of the printing unit is fully opened below the lower end 46a of the cover plate 46. After releasing in this way, the kneading roller 10
Although the detaching rollers 5 and 8 and the rider roller 12 are detached and attached and adjusted, the work is extremely easy because the gap between the swing roller 9 and the swing roller 11 is completely open. Also, by opening the upper cover 30, the limit switch
Since the contact of 43 is closed and the machine cannot be started,
It is safe because the machine will not start even if the switch is accidentally turned on during work. After the work, the upper and lower covers 30 and 31 are closed, the dust removing bar 25 is inserted into the holder 36, and the holder 36 is brought close to the frame 1 on one side, so that the printing work can be resumed immediately.

[Effect of device]

As is apparent from the above description, according to the present invention, in the plate surface dust removing device of the sheet-fed printing press, the safety cover for covering the peripheral surface of the roller of the inking device or the water supply device is pivotally supported on the frame side so as to be openable and closable. By integrally forming a holder that supports the dust removal bar so that it can be inserted and removed, and is movable in the direction parallel to the cylinder axis of the plate cylinder, the holder for supporting the dust removal bar retreats upward when the cover is opened, and Since the front surface of the water supply device is open to a wide area without obstacles such as the retaining stay of the conventional dust removing bar, each roller is easy to see and reach, and its attachment / detachment and adjustment are extremely easy. The workability is improved, the work time is shortened, and the operation rate of the machine is improved. In addition, safety is improved by not touching hands during work.

[Brief description of drawings]

1 to 4 show an embodiment of a plate surface dust removing device of a sheet-fed printing press according to the present invention. FIG. 1 is a side view of a printing unit which carries out this, and FIG. 2 is a view taken along line II of FIG. FIG. 4 is a front view, FIG. 3 is an enlarged side view of the main part of FIG. 1, and FIG. 4 (a) is an IV front view of FIG. 3 showing a state in which a dust removing bar is inserted.
Figure (b) shows IV in Figure 3 with the dust removal bar removed.
FIG. 5 is a front view as viewed from the side, and FIG. 5 is a side view of a printing unit provided with a plate dust removing device of a conventional sheet-fed printing press. 2 ... plate cylinder, 3 ... plate, 4 ... inking device, 5 ... inking roller, 7 ... water supply device, 8 ... swimsuit roller, 12 ...
… Rider roller, 25 …… Dust removal bar, 30,30A …… Upper cover, 31,31A …… Lower cover, 32,33 …… Guide bar, 36 …… Holder, 37,38 …… Plate, 39 …… Top, Four
1 …… hole, 44 …… bracket.

Claims (1)

[Scope of utility model registration request] 1. A sheet-fed printing press having a dust removing bar which is inserted from a safety cover side covering a roller peripheral surface of an inking device or a water supply device toward a plate surface on a plate cylinder through a space between the inking device and the water supply device. In the dust removing device, the safety cover is pivotally supported on the frame side so as to be openable and closable, and a holder movable in a direction parallel to the drum shaft of the plate cylinder that supports the dust removing bar to be inserted into and removed from the safety cover is integrally formed. A plate dust removing device for a sheet-fed printing press, which is characterized in that