JPS60255437A - Apparatus for adjusting blade of ink fountain - Google Patents

Abstract

PURPOSE:To allow the quantity of ink sent out by a fountain roller to coincide with display by bringing the rotary angle of a cam and the position of a blade (that is, the interval between the fountain roller and the blade) to linear relation, by forming the cam for moving the blade from the eccentric circular cam. CONSTITUTION:In an ink supply unit wherein an ink fountain 1 is constituted of a fountain roller 4, side plates 2 and a fountain plate 3 and the blade 22 provided to the under side of the fountain plate 3 in a slidable manner is moved and the gap between the leading end of said blade 22 and the fountain roller 4 is changed to regulate the quantity of ink sent out by the fountain roller 4, the rotation of a motor 10 is trasmitted to a cam shaft 17 through gears 14, 15, 16 and the blade 22 is contacted with the eccentric circular cam 30 mounted to the upper end part of the cam shaft 17 through a bearing 31 and a guide plate 32. The sending-out quantity of ink is displayed by the signal from the potentiometer provided to the lower end part of the cam shaft 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention rotates a drive motor that operates a blade for adjusting the ink supply amount of a printing press by operating a push button on an operation panel, and the rotation of the motor is controlled via a gear mechanism and a cam mechanism. By moving the blade back and forth and adjusting the gap between the brim roller and the blade, the amount of ink supplied through the gap can be adjusted, and a signal corresponding to the rotation angle of the cam mechanism can be sent to the operation panel. The type of ink feeding and displaying the ink supply amount on the operation panel is related to the blade adjustment device.

A conventional ink blade adjustment device of this type will be explained with reference to FIGS. 1 and 2. FIG. 1 shows a cross-sectional view of an ink fountain blade adjusting device and an ink supply unit assembled together, and FIG. 2 shows a plan view of the ink fountain blade adjusting device.

In FIG. 1, 1 is an ink supply unit, which is composed of a side plate 2 and a plate 3, and a space surrounded by a flange roller 4 forms an ink fountain. The ink is placed inside this container.

There is a gap between the tip of the plate 3 and the spit roller 4, and the ink adhering to the surface of the spit roller 4 is removed by the intermittent rotation of the roller 4, passing through this gap and being transferred to the next transfer. It is transferred to a roller (not shown). A large number of ink supply units 1 are arranged in parallel along the axial surface of the roller 4 to constitute an ink supply device, and are mounted on a collar stand 8 held by a frame 7 by a fixed bottle 5 and a clamp device 6. is fixed.

Reference numeral 9 denotes an ink blade adjustment unit, and as shown in FIG. constitutes a blade adjusting device and is fixed to the frame 8 by bolts 26.

By pressing the ink supply amount "small" socket 11 on the operation panel shown in FIG. 3, the motor 10 shown in FIG. 1 rotates, and the gear 1
4, cam 1 via gear 15, gear 16 and camshaft 17
8 rotates. As the radius of the cam 18 increases, the blade 22 approaches the roller 4 via the cam roller 19, pin 20 and blade guide 21, and the ink supply rate decreases.

By pressing the ink supply amount "dog" push button 12 on the operation panel shown in FIG. increases.

A rotary potentiometer 25 is attached to the lower end of the camshaft 17, and converts the change in resistance value due to rotation into an electrical signal, which is displayed on a bar graph 13 on the operation panel shown in FIG. Each unit 9 of the ink blade device can independently adjust the ink supply amount in the width direction of the pattern.

In the conventional ink fountain blade adjusting device described above, due to manufacturing errors in the cam 18, the actual cam shape has a large deviation from the ideal cam shape as shown in FIG. Fourth
In the figure, the horizontal axis shows the rotation angle of the cam, and the vertical axis shows the cam lift amount.

Curves a, b, c, d, and e in the figure show the measured values of the actual cam shape, and the broken line f shows the value of the ideal cam shape.

As shown, curves a to e each have deviations from curve f, with a maximum deviation of 0.2 M. Manufacturing errors in the cam shape directly affect the ink supply amount, and the ink supply amount display on the operation panel may not match the actual ink supply amount.
There is a drawback that it interferes with the adjustment of the ink supply amount.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional devices described above and to provide an ink blade adjustment device in which the ink supply amount displayed on the operation panel and the actual ink supply amount substantially match.

The main points of the present invention are: - Since it is difficult to manufacture a large number of cams used in a device with small manufacturing errors and uniformity of cam shape, an easily manufactured eccentric circular cam is used as a cam substitute. The structure is such that the blade is moved back and forth through this eccentric circular cam.

Hereinafter, the present invention will be specifically explained with reference to embodiments illustrated in the drawings. FIG. 5 shows an embodiment of the invention. FIG. 6 is a cross-sectional view of the ink fountain blade adjusting device and the ink supply device, and FIG. 6 is a plan view of the ink fountain blade adjusting device. In FIGS. 5 and 6, parts having the same functions as those in FIGS. 1 and 2 are given the same numbers.

Due to the rotation of motor lO, gear 14. Gear 15. gear 1
The apparatus is similar to the conventional apparatus shown in FIGS. 1 and 2 until the camshaft 17 is rotated through the camshaft 6 and a potentiometer 25 is attached to the lower end of the camshaft 17. The difference is that
An eccentric circular cam (eccentric cam) 30 is attached to the upper end of the camshaft 17.
A guide plate 32 is provided which is inscribed in this eccentric circular cam 30 via a bearing 31, and the guide plate 32 is moved back and forth by the rotation of the cam shaft 17, and the blade 22 connected to the guide plate 32 is moved at the same time. This structure changes the amount of clearance between the collar roller 4 and the blade 22 by moving it back and forth.

The off-line diagram shows changes in the amount of movement of the blade 220 back and forth due to the eccentric circular cam 30. The solid line shows the actual value measured by the actual eccentric circular cam, and the broken line shows the ideal straight line. As shown in the figure, if the solid line between A4 and B is adopted as the gap adjustment section,
The ideal straight line of the broken line can be approximated with an error within 0.011XWI, and the blade 22 and collar roller 4 shown in FIG.
If the structure is such that the guide plate 32 is assembled and adjusted by changing the length of the guide plate 32 so that the gap between them becomes 0, the relationship between the "cam rotation angle" and the "gap amount" will be as shown in FIG.

The manufacturing error of the eccentric circular cam is o, o in the position degree of the center of the eccentric circle.
Since it is possible to manufacture products within iWIR and within 0.01 degree of roundness of the outer circumference of the eccentric circular cam, the cumulative error is 0.0 for the ideal straight line and for the mutual difference between multiple eccentric circular cams.
It is possible to keep it within 4.

In addition, by setting the resistance of the potentiometer 25 to a specified value at the 0 point and the D point in FIG. The pressing prevents the motor 10 from seizing due to excessive pressing and prevents the gap from becoming larger than necessary.

As described above, according to the present invention, the ink supply amount displayed on the operation panel and the actual ink supply amount can be matched in #1.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the blade adjustment device and ink supply device for conventional ink, Figure 2 is a plan view of the blade adjustment device for conventional ink, and Figure 3 is an overview of the blade adjustment operation panel for conventional ink. 4 is a diagram showing the relationship between the conventional cam rotation angle and cam lift amount, FIG. 5 is a cross-sectional view of an ink fountain blade adjusting device and an ink supply device showing an embodiment of the present invention, and FIG. The inside view is a plan view of the blade adjustment device of the present invention, the off view is a diagram showing the relationship between the operating angle and lift amount of the eccentric circular cam according to the present invention, and Fig. 8 is a diagram showing the relationship between the rotation angle of the eccentric circular cam and the pot roller according to the present invention. - It is a diagram showing the relationship between the amount of gaps between blades. 1... Ink supply unit, 4... Roller, 9
... Ink fountain blade adjustment unit, 10... Motor, 11.12... Push button on the operation panel, 13... Ink supply amount indicator on the operation panel, 14, 15.16...
・Kear, 17...Camshaft, 22...Ink blade, 30...Eccentric circular cam, 31...Bear link,
32...Information plate. Fang 1 Figure 5 Kano 2 Zuko 3 Kunime 4 To Chiryoku 4″P Tochisou (Liuo 5 m Fang G River

Claims (1)

[Claims] By operating a push button on the operation panel, the drive motor that operates the ink supply adjustment blade of the printing press is rotated, and the rotation of the drive motor is used to move the blade back and forth through a gear mechanism and a cam mechanism. 2 and a screw for adjusting the gap between the blades, the amount of ink supplied through the gap is adjusted, and a signal corresponding to the rotation angle of the cam mechanism is sent to the operation panel, and the ink is displayed on the operation panel. Ink that displays the supply amount is used in the blade adjustment device.
The cam of the cam mechanism is an eccentric circular cam, and a guide plate is provided which is inscribed in the eccentric circular cam via a bearing and moves back and forth by rotation of the eccentric circular cam, and the blade is moved back and forth via the guide plate. The ink is characterized by a blade adjustment device.