JPS5857957A - Inking unit - Google Patents

Abstract

PURPOSE:To prevent the leakage of ink from the partition surfaces of separated blades and as well as facilitate the adjustment of individual blade by a structure wherein the separated blades, throughout the whole width of the back surface to which flexible sheets are pasted, are arranged capably of shifting the blades toward and inking roller. CONSTITUTION:The end surfaces 2a of the separated blades, which are separated into a plurality of blades in the longitudinal direction of the inking roller 1, are supported by pinching with blade keepint plates 10. The keeping plates 10 are attached to a supporting block 3 through bolts 12 and washers 17, both of which are installed in elongated holes 18 formed in the supporting block 3. An adjusting screw 14, which is screwed in piece 13 fixed to the rear part of the individual keeping plate 10, adjusts the gap between the tip of the individual blade 2a and the roller 1 by adjusting the amount of the screw 4 protruded from the piece 13 with one side of the screw 14 being projected on the supporting base 3 and with the other side of the screw 14 being screwed in a nut 15. Furthermore, the leakage of ink from the partition surfaces of the blades 2a is prevented by pasting thin flexible sheets 16 over the whole width of the back surface of the blades 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink fountain device for a printing press. As shown in FIG. 1, the ink dispenser of a printing press has a support stand 3 for an ink doctor knife 2 adjacent to the outer peripheral surface of an ink dispenser roller 1.
is arranged on the support stand 3, and a mounting stand 4 to which the ink doctor knife 2 is integrally attached is attached to the support stand 3 by means of bolts ( (not shown). A number of cams 5 contact the ink doctor knife 2 to adjust the gap between the ink dispenser a-ra 1 and the ink doctor knife 2, and are pivotally supported by the cams 5 on a support base 3 via a pin 6. , the adjustment screws 7 screwed onto the support base 3 are attached to each rear surface Km of the cam 5.
(,ing.

Therefore, in order to adjust the amount of ink, when one operator turns the adjustment screw 7 in the positive or negative direction, the cam 5 uses the pin 6 as a fulcrum and rotates in the positive or negative direction. As a result, the tip of the ink doctor knife 2 approaches the ink dispenser roller 1 by a small distance and then moves away from it, so that the gap between the ink dispenser roller 1 and the ink doctor knife 2 is locally finely adjusted.

If you want to use this ink dispenser to obtain the necessary ink film thickness range on the ink dispenser roller 1 and change the ink film thickness to the minimum necessary, adjust the adjustment screw 7? 1- Since the cam 5 must be rotated many times, the operation for adjusting the ink output amount is slow, and it is difficult to check the adjustment amount of the cam 5, that is, the ink output amount from the outside.

Furthermore, in order to adjust the amount of ink, the ink doctor knife 2 is deformed by the adjustment screw 7VC, so if the necessary part of the ink doctor knife 2 is deformed, the effect will be felt on the adjacent parts. Assuming that the ink film thickness (ink amount) indicated by diagonal lines as shown in the figure is required on the longitudinal parts (1) to (4) of the circumferential surface of the ink dispenser roller l shown in the figure, Even if the adjustment screw 7 is moved so that the amount of ink in the shaded area comes out, the adjustment screw 7 is moved because the ink doctor knife 1 is made of a single thin plate.
It does not deform in accordance with the amount of movement, but instead deforms as shown in FIG. 4, making it impossible to obtain the desired amount of ink in, for example, portion (3).

Therefore, the conventional thin ink doctor knife 2 is divided into a plurality of pieces in the longitudinal direction, and a nine-segment blade 2a is used to easily adjust the amount of ink dispensed on the ink dispenser roller 1. This splitting blade (
12a Ink sometimes leaked from the split surface. Furthermore, since the split blade 2a was installed in a fixed position with respect to the ink ductor roller 1, when the tip of the blade 2a wears out due to contact with the blade due to the mechanical processing accuracy of the ink ductor roller 1, the split blade 21 Nine-piece split blade 2at that is not movable relative to the ink fountain roller 1 - must be replaced.

In view of the points related to the present invention, an ink fountain device 1 is provided in which the gap between the blade and the ink fountain roller can be easily adjusted even if the blade is worn out by moving the divided grade with respect to the ink fountain roller. That's what we offer.

Another object of the present invention is to provide an ink dispenser that prevents ink from leaking from the dividing surface by pasting a thin flexible sheet over the entire width of the back surface of the dividing blade.

Hereinafter, the present invention will be explained in detail with reference to the drawings. 5 and 6 are schematic shoulder diagrams showing embodiments of the present invention, in which:
Components having the same functions are designated by the same reference numerals in Figures 1 to 4, and their explanations will be omitted. Divide the blade into 10 pieces with a 2at clamp and a blade holding plate.

As shown in FIG. 6, the blade 2a is attached to the support base 3 in close contact with the layered surface of the blade 2a through a hole H2 installed in the elongated hole 18 and a washer 17. 13 is a piece fixed to the rear part (right end in Figure 5) of the blade holding plate 10, and the adjustment screw 14 is threaded into the piece 13, and on one side (left side in Figure 5) is a piece that protrudes from the support base 3. The tip of the split blade 2m (left end in FIG. 5) is screwed together with the dowel 15 on the other side (right side in FIG. 5) and adjusts the amount of protrusion of the adjustment screw 14 from the piece 13.
The gap between the roller and the inner creampie roller is adjusted. 16 is a Te-Ayuron tape attached to the lower surface of the divided blade 2a with adhesive.
This prevents ink from leaking from the dividing surface of (a).

In such a configuration, the tip 11!5 of the split blade 2a
1llll on the left in the figure) is worn out by the ink dispenser roller, loosen the bolt 12t and adjust the protruding amount of the adjustment screw 14 from the piece 13 by loosening the bolt 12t and adjusting the distance between the parts 1 and 15. If it is made smaller than that shown in FIG. 5, the split blade 2a (together with the blade holding plate 10) will move to the left in FIG. 5 due to the gap between the bolt 12 and the elongated hole 18.

As explained above, in the present invention, when the dividing blades are worn out, they can be moved individually, so the blades can be easily adjusted, and the back side of the dividing blades is affixed with a 1IIVc film against the ink. Ink leakage from the end face of the blade can be prevented.

[Brief explanation of the drawing]

No. trI! JrzSchematic structural diagram of conventional ink pumping device,
Figures 2 to 4 show examples of the amount of ink on the conventional ink dispenser roller and modifications of the ink dispenser blade. A state diagram showing,
FIG. 5 is a schematic structural diagram of an ink fountain device showing an embodiment of the present invention, and FIG. 6 is a view taken along the arrow 2 in FIG. 5. lO...Grade holding plate, 12...Bolt, 13.
...Frame, 14...adjustment screw 1.15...wF"
s16... Sheet, 17... Washer, 18... Long hole. Applicant: Toshiba Machine Co., Ltd.

Claims (1)

[Claims] A split blade that is divided into a plurality of parts in the longitudinal direction of the ink fountain roller, a thin flexible sheet that is attached to the entire width of the back surface of the blade to prevent ink from leaking from the split surface of the blade, and An ink dispenser comprising means capable of moving back and forth relative to a dispenser roller.