JPH02184439A - Ink fountain for printing press - Google Patents

Abstract

PURPOSE: To prevent the outflow of ink from the end surface of the side wall of an ink fountain by fixing a rear side wall member and the support member of a support roller to the main body of the ink fountain so that the end surface of a front side wall member and the support roller come into contact with the surface of an ink fountain roller through an ink fountain revolving transmission device. CONSTITUTION: An ink fountain side wall 4 is divided into two side wall members 5, 6 arranged before and behind an ink fountain roller 8 in a radial direction and both side wall members 5, 6 are mutually connected by an elastic member 7. In this case, the side wall 4 is fixedly so attached as to be pushed forward with respect to a support member 23. That is, the end surface 19 of the front side wall member 5 and a support roller 22 are so attached to the surface of an ink fountain roller 8 as to elastically deform the elastic member 7 through ink fountain revolving transmission devices 13, 14 to which preload can be applied to elastically come into contact with the surface of the ink fountain roller 8. By this constitution, the contact of the front side wall member 5 with the end surface 19 is extremely accurately kept in order to prevent the outflow of ink.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ink fountain for a printing press, in which the ink fountain is supported on both sides by support rollers on the surface of the ink outlet. an adjusting member in which the roller is provided on a plate-shaped support member fixed to the ink fountain body, and the ink tip is supported within the ink fountain body;
the ink fountain side wall and the ink fountain swiveling transmission which can be preloaded, the adjusting element acting on an ink metering element of an ink metering device accessible between the support points of the support roller; , the ink fountain side wall is in contact with the surface of the ink fountain roller with an end face adapted to the surface curvature of the ink fountain spout, and the ink fountain swivel transmission exerts a force on the support roller to maintain the contact. Relating to things that are designed to have an effect.

Prior Art The ink fountain of the above type is DE-OS 321804.
It is known from the specification no. By guiding the ink on the surface of the ink ductor roller on both sides by means of support rollers, the position of the ink metering member relative to the ink ductor roller is determined very reliably. However, it is particularly disadvantageous that during operation of the printing press, due to the guide of the ink by the support roller, the end face of the rigid ink side wall contacts the surface of the ink ductor roller only unevenly. As a result, the different thermal expansions of all the mechanisms during press operation cause ink to flow out from the end faces of the side walls.

Problem to be Solved by the Invention The object of the invention is to improve an ink fountain of the type mentioned at the outset so that, during operation of the printing press, in addition to the support roller, the end face of the side wall of the ink fountain also corresponds very accurately to the surface of the ink ductor roller. The aim is to make it possible to follow it perfectly.

Means for solving the problem According to the invention, the ink fountain side walls are arranged one after the other in the radial direction and are connected by an elastic member.
The rear side wall element and the plate-shaped support element of the support roller are connected to the end face of the front side wall element and the support roller via a preloadable ink fountain swiveling transmission. This problem was solved by fixing the ink fountain body to the ink fountain body so as to be in contact with the surface of the dispenser roller.

Further advantageous configurations are specified in the further claims.

Advantages of the Invention The present invention has a number of advantages. Firstly, the contact of the ink fountain side wall against the end face is always guaranteed to be extremely precise and flawless, which means that the ink fountain roller is not perfectly round, that manufacturing and assembly errors that may occur in some cases due to ink droplets, as well as thermal expansion during heating of the printing press are avoided. guaranteed regardless of
Therefore, ink is prevented from flowing out from the end face of the side wall of the ink fountain. Wear between the ink fountain side wall and the surface of the ink fountain roller is reduced to a minimum, so that the wear on the ink fountain roller is reduced to a minimum if the ink fountain side wall and the support roller are simultaneously supported on the surface of the ink fountain roller. The risk of groove formation is also avoided.

Embodiment Each ink ductor roller 8 has two support rollers 22.
Support members 23 are supported through the ink fountain roller 8, and these support members are provided at both ends of the ink fountain roller 8. The ink body 3 of the ink fountain 1 is connected to a support member 23, for example by means of a screw 25;
extends parallel to the fountain side wall 4 on both sides.

The ink fountain 1 is fixedly supported relative to the frame and loosely supported on both sides by a holder 16 which, when supported via a support element 23, allows the ink fountain to move without force on a support roller 22. It must have enough play to follow.

The cooperation between the ink fountain roller 8 and the ink fountain 1 is brought about by the stroke movement of the support member 23. This stroke movement is transmitted from the worm gear 13 to the ink fountain 1 via the buckling lever 14 and the bottle 24. In this case, the ink fountain 1 is first pivoted about the bearing shaft 15 of the holder 16 until the lower supporting roller 22 is still in contact with the surface of the ink ductor roller 8. The ink fountain 1 is then raised on the holder 16 within the range of play mentioned above, in which case the lower support roller 22 comes into contact with the surface of the ink fountain roller 8 and the ink fountain 1 is then lifted against the side wall 4 and the upper support roller 22. Fully contact by. In this case, by fixedly connecting the support roller 22 to the ink fountain 1 via the support member 23, a predetermined co-operation between the ink fountain 1 and the ink fountain roller 8 is achieved.

In order to keep the supporting roller 22 always in contact with the ductor roller 8, it is necessary for the swivel gear 13, 14 to generate a prestress in such a way that the buckling lever 14 moves beyond its top dead center. In this way the ink fountain
and the ink fountain row 28 is made possible. Therefore, no forcing forces occur which have an adverse effect on the relative position between, for example, the ink fountain 1 and the ink fountain roller 8.

In order to ensure a sufficiently precise and wear-free contact between the surface of the ink ductor roller 8 and the end face 19 of the ink fountain side wall 4 during press operation, the ink side wall 4 is radially opposite to the ink fountain roller 8. It is divided into two side wall members 5 and 6 which are arranged one behind the other and are connected to each other by an elastic member 7. In this case, the side wall 4 is fixedly mounted in such a way that it can be pushed forward against the support element 23, i.e. first via an ink fountain pivoting gear 13, 14 which can be preloaded. Elastic member 7
The end face 19 of the front side wall member 5 is elastically deformed, and then the support roller 22 is mounted in such a way that both of these members come into contact with the surface of the ink ductor roller 8 in a spring-elastic manner.

In this way, the contact of the front side wall element 5 with the end face 19 is maintained very accurately and satisfactorily in order to prevent the ink from flowing out, i.e. due to the out-of-roundness of the ink ductor roller and the case of the ink fountain. It remains independent of manufacturing and assembly tolerances and thermal expansion of the entire mechanism. Furthermore, only very little wear occurs. Furthermore, the risk of the formation of gouges on the surface of the ink ductor roller 8 due to heat-induced expansion (stretching) of the ink fountain side wall 4 is completely eliminated.

The soft spring-elastic contact of the front side wall part 5 is maintained very reliably, and the more or less hard spring-elastic contact of the support roller with the surface of the ink ductor roller 8 ensures a very reliable ink metering element. The location can be clearly determined.

The drawing schematically shows an adjusting element mounted in the ink fountain body 3, which is connected to the adjusting drive 12.
and acts on the ink metering member 2. The ink metering element can be constructed in any known manner.

FIGS. 2 and 6 show the ink fountain side wall 4 in detail in side view and top view.

The ink fountain side wall 4 has holes 21 or grooves 1 in order to be able to be fixed to the ink fountain body 3 via screws 17.
It has 8. In order to improve the sealing effect, the fountain side wall 4 is provided with a wedge section 20 in a known manner.

In this case, the front side wall part 5 is preferably made of sliding material, for example brass. The material of the rear side wall element 6, like that of the support element 23, is preferably copper, cast iron or a comparable material. The elastic member 7 is preferably made of an elastomer made of anti-aging rubber which has satisfactory spring elastic properties. The connection between the side wall parts 5.6 and the viscoelastic elastic part 7 takes place in a known manner by gluing or by vulcanization.

Reference numeral 9 indicates an ink transfer roller and reference numeral 10 indicates an ink leveling roller.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which FIG. 1 is a side view of the ink fountain, FIG. 2 is a detailed side view of the side wall of the ink fountain, FIG. 6 is a plan view of the side wall of the ink fountain, and FIG. The figure is the first
2 is a plan view of a portion of the ink fountain shown; FIG. 1... Ink fountain, 2... Ink metering member, 3...
Ink fountain body, 4... Ink fountain side wall, 5, 6...
Side wall member, 7. Elastic member, 8. Ink dispenser roller, 9
... Ink transfer roller, 10 ... Ink leveling roller, 11 ... Adjustment member, 12 ... Drive device, 13. Worm transmission device, 14 15 ... Support shaft, 16 ... Holding body, same , 18... Groove, 19... End face, 2 21... Hole, 22... Support roller, 24... Pin buckling lever 17.25... Thread 0... Wedge part, 23... support member,

Claims (1)

[Claims] 1. An ink fountain for a printing press, wherein the ink fountain is supported by support rollers on both sides of the surface of an ink fountain roller, and the support rollers are fixed to the ink fountain body. the ink fountain has an adjusting element mounted in the ink fountain body, an ink fountain side wall and an ink fountain swiveling transmission which can be preloaded; acts on an ink metering member of an ink metering device which is accessible in the area between the support points of the support roller, and the ink fountain side wall dispenses ink by means of an end face adapted to the surface curvature of the ink ductor roller. In the type in which the ink fountain side wall (4) is in contact with the surface of the roller and is adapted to exert a force on the supporting roller in order to maintain said contact, the ink fountain swivel transmission is provided with an elastic member ( Consisting of two side wall members (5, 6) arranged one after the other in the radial direction, connected by a rear side wall member (6)
and a plate-shaped support member (2) of the support roller (22).
3) is connected to the front side wall part (5) via the ink fountain swivel transmission (13, 14) which can be preloaded.
) is fixed to the ink fountain body (3) so that the end surface (19) of the ink fountain and the support roller (22) are brought into contact with the surface of the ink fountain roller (8). Inkpot. 2. Ink fountain according to claim 1, further comprising a spring-elastic elastic member (7) made of a viscoelastic elastomer. 3. The front side wall member (5) is made of sliding material;
An ink fountain according to claim 2. 4. Ink fountain according to claim 1, wherein the rear side wall element (6), like the support element (23) and the fountain body (3), is made of metallic material. 5. The ink fountain swiveling transmission (13, 14) with which a preload can be applied has a buckling lever (14), which buckling lever can be moved beyond the dead center via the worm transmission (13). 5. An ink fountain as claimed in claim 1, which is movable.