JP2002316403A - Inking arrangement for rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of an ink weir, to reduce manufacturing cost by reducing the number of part processing processes and the number of assembling processes and to certainly prevent the leak of ink. SOLUTION: The ink weir 16 is formed of a nylon resin and provided with insertion holes 31 permitting the insertion of bolts for fixing the ink weir 16 to a blade. A pair of opposed parts 32 and 33 formed into a bifurcated shape are provided to the side part of the ink weir 16. Screw holes 35 are provided to one opposed part 32 while the opposed contact surface 33a, which is opposed to the side end surface of an ink fountain roller so as to come into contact therewith, is provided to the other opposed part 33. The opposed contact surface 33a of the opposed part 33 is pressed to the side end surface of the ink fountain roller by the leading end of the bolts 36 screwed in the screw holes 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink device for a rotary printing press, and more particularly to an ink dam for preventing ink from leaking from an ink fountain.

[0002]

2. Description of the Related Art An inking device for a rotary printing press of this type is disclosed in Japanese Patent Application Laid-Open No. 7-1717. An ink fountain roller disclosed in Japanese Patent Application Laid-Open Publication No. H11-15095 discloses an ink fountain roller in which an ink crest pressed against both end surfaces is fixed to an ink fountain main body side. And an inner plastic jaw pressed against the plastic jaw. The plastic jaw is held on the metal jaw by a pair of clamps and screws, and a slight gap is provided between the plastic jaw and the metal jaw by an elastically domed screw screwed to the metal jaw. When the ink dam configured as described above is disposed on both end faces of the ink fountain roller, the plastic jaw moves toward the metal jaw only within the gap between the metal jaw and the elastic force of the dome screw. . Therefore, the plastic jaws are pressed against both end surfaces of the ink fountain roller by the elastic force of the dome screw, so that the ink is prevented from leaking from between the both end surfaces of the ink fountain roller and the plastic jaw.

[0003]

However, in the above-described ink device of the conventional rotary printing press, the ink dam is not only composed of two members, a metal jaw and a plastic jaw. They needed clamps or screws or special domed screws. For this reason, there has been a problem that the structure of the ink dam becomes complicated, and the number of processing steps for these parts and the number of assembling steps are increased, so that the manufacturing cost is increased. In addition, since the plastic jaw is pressed against the side end surface of the ink fountain roller solely by the elastic force of the dome portion at the tip of the screw, the plastic jaw cannot be displaced in the axial direction of the roller on the side end surface of the ink fountain roller. The range that Joe can follow is limited. For this reason, not only a temperature change of the ink fountain roller, but also a displacement of the side end surface of the ink fountain roller due to abrasion of the side end surface, and a wear of the dome portion at the tip of the plastic jaw or the screw with a dome, etc. However, there is a problem that the plastic jaws cannot follow, and the ink leaks from a gap between the side end surface of the ink fountain roller and the plastic jaws.

The present invention has been made in view of the above-mentioned conventional problems, and a first object of the present invention is to simplify the structure of an ink dam. A second object is to reduce the manufacturing cost by reducing the number of processing steps and the number of assembly steps of parts. A third object is to reliably prevent the ink from leaking.

[0005]

In order to achieve this object, according to the first aspect of the present invention, an ink fountain roller rotatably supported and a tip provided near the ink fountain roller are provided. In an ink device for a rotary printing press, comprising a bottom plate and a pair of ink weaves having a contact surface that is substantially orthogonal to the bottom plate and is in contact with both end surfaces of the ink fountain roller, a bifurcated shape is formed on the ink weir. And a pair of spaced-apart opposing portions is provided, and a contact surface of the other opposing portion is pressed against a side end surface of the ink fountain roller by a bolt screwed to one opposing portion. Thus, the ink weir is formed by a single member.

According to a second aspect of the present invention, in the first aspect, the ink dam is formed of an elastic material. Therefore, when the bolt is screwed in, both of the pair of opposed portions formed in a forked shape are elastically deformed.

According to a third aspect of the present invention, in the first aspect of the invention, the ink dam is formed of a nylon resin. Therefore, when the bolt is screwed, both the pair of opposed portions formed in a forked shape are elastically deformed, and the processing is easy.

According to a fourth aspect of the present invention, in the first aspect of the invention, the thickness of the other facing portion of the ink dam is formed to be relatively thinner than the thickness of the one facing portion. . Accordingly, when the bolt is screwed in, one of the thinner opposed portions is deformed and comes into close contact with the side end surface of the ink fountain roller.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing only both end portions of an inking device of a rotary printing press according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 3 (a) is a plan view, FIG. 3 (b) is a side view, and FIG. 3 (c) is a front view. FIG. 4 is an enlarged side view of a main part for explaining the function of the ink dam. In FIG. 4, the ink dams are hatched for convenience.

In FIG. 1, an ink fountain roller 2 rotating in the direction of arrow A in FIG. Behind the ink fountain roller 2, the ink fountain roller 2 is formed to have substantially the same length as BB in FIG.
2, a blade base 3 is provided which is rotatable in a direction indicated by an arrow C in FIG. 2 around a support shaft (not shown) provided below the ink fountain roller 2.

Reference numeral 4 denotes a bracket fixed inside the base frame 1. The bracket 4 includes a handle 5
And the bolt 6 are screwed in from opposite sides, and the handle 5 is engaged with the U-shaped groove 7 of the blade base 3 and tightened to fix the blade base 3 at the position shown in the figure.
On the other hand, by loosening the handle 5, the blade base 3 can be rotated in the direction of arrow C for cleaning or the like.

Reference numeral 8 denotes a plurality of divided blades formed in a strip shape. The divided blades 8 are supported on the upper surface of the blade base 3 so that the side surfaces thereof are in close contact with each other so as to be capable of moving forward and backward with respect to the peripheral surface of the ink fountain roller 2. Are arranged in the axial direction of the ink fountain roller 2. At both ends of these divided blades 8, end divided blades indicated by reference numerals 8A and 8B are fixed on the blade base 3 after positioning by positioning means (not shown).

Reference numeral 9 denotes a press plate as a bottom plate formed of a thin steel plate. The press plate 9 is formed so as to cover the entire surface of the split blade 8 and substantially half of the end split blades 8A and 8B. At the rear end of the plate 9, there is a square lumber 10 of the same width.
Are provided integrally. 11 is a split blade 8, 8
A square stay formed to have the same length as the widths of A and 8B. At both ends of the square stay 11, stoppers 13 are fixed by fixing bolts 14, and the holding plate 9 is provided with the stoppers. The rectangular bar 10 is fixed to the blade base 3 by pressing both ends of the bar 13 with 13.

Reference numeral 15 denotes a plurality of magnets, which are embedded in each of the divided blades 8, 8A, 8B, and hold down the holding plate 9, the divided blades 8, 8A, 8B and the blade base 3.
Are magnetically attracted so that they adhere to each other. A pair of ink dams 16, 16 formed in a substantially triangular shape in side view are fixed on the end division blades 8 </ b> A, 8 </ b> B by bolts 17. The ink 1 is contained in an ink fountain 18 formed by being surrounded by the ink dams 16, 16 and the presser plate 9, the dividing blades 8, 8A, 8B and the peripheral surface of the ink fountain roller 2.
9 are stored.

A through hole 20 is formed in the dividing blade 8,
The head of the eccentric pin 21 fitted into the blade base 3 is engaged with the through hole 20. A compression coil spring 23 is interposed between a spring receiver 22 protruding from an eccentric portion of the eccentric pin 21 and a rear wall of a spring groove provided on the divided blade 8. The ink is urged in a direction to separate from the ink fountain roller 2 and is held. At the same time, the eccentric pin 21 is
By turning, the spring receiver 22 is displaced to release the elasticity of the compression coil spring 23, and the split blade 8 is configured to be detachable from the blade base 3.

A bracket 24 formed in a U-shape is attached to the front surface of the square stay 11 by bolts 25, and the bracket 24 is supported by an eccentric pin 26 which is rotatably supported by the bracket 24. In the concentric part, there is an adjustment lever 2
7 has an upper end fixed. A roller 28 is fitted to the eccentric portion of the eccentric pin 26 with its peripheral surface being in contact with the rear end surface of the divided plate 8. In such a configuration, when the adjusting lever 27 is swung by a drive mechanism (not shown), the eccentric pin 26 which is integral with the adjusting lever 27 is rotated. The gap t between the peripheral surface of the urn roller 2 and the tip of the split blade 8
Is configured to be adjusted.

The ink fountain or split blade described above does not differ from the ink device of a rotary printing press widely used in the past. The feature of the present invention resides in the structure of the ink dam 16, which will be described with reference to FIGS. The ink dam 16 is formed entirely of an elastic nylon resin and has a stepped insertion hole 3 having three large-diameter portions penetrating the upper end surface and the lower end surface.
A pair of opposed portions 32 and 33 formed in a forked shape facing each other across a slit 34 provided substantially at the center in the thickness direction is provided on one side. One of the facing portions 32 and 33 has three screw holes 35 in one of the facing portions 32. A bolt 36 is screwed into the screw hole 35, and the other facing portion 33 has an ink fountain roller. A contact surface 33a that is in contact with the second side end surface 2a is provided.

As shown in FIG. 2, the pair of ink dams 16 and 16 stand upright so as to be orthogonal to the holding plate 9, and as shown in FIG.
Are fixed to the end division blades 8A and 8B by the bolts 17 inserted into the insertion holes 31 so as to be in contact with both side end surfaces 2a of the ink fountain roller 2. As shown in FIG. 3, a bolt 36 screwed into a screw hole 35 of one of the opposed portions 32 is screwed, and the other opposed portion 3 is screwed at the tip of the bolt 36.
3 is pressed in the direction of arrow D in the figure.

The ink dam 16 is formed of an elastic nylon resin, and has a slit 3 between the opposed portions 32 and 33.
4, the interval between the slits 34 is increased by pressing the other opposing portion 33 in the direction of arrow D in the figure with the tip of the bolt 36, and the opposing portion 33 is moved in the direction of arrow D, ie, the ink fountain roller. 2 are elastically deformed toward both end surfaces 2a. That is, as shown in FIG.
Is elastically deformed by L1 in the direction of arrow D, and the one opposing portion 32
Is elastically deformed by L2 in the direction opposite to the arrow D direction.

Therefore, when the side end face 2a is displaced in the direction of arrow D due to a temperature change of the ink fountain roller 2, abrasion of the side end face 2a, or the like, the displacement of the side end face 2a causes the opposing portion 33 of the ink dam 16 to move. Is the difference in the amount of elastic deformation between the outer facing portion 32 and the inner facing portion 33 (L2-L1). In this case, the length of the facing portions 32 and 33 is increased, and the elastic deformation amount L2 of the outer facing portion 32 is increased.
Is larger than the elastic deformation amount L1 of the inner facing portion 33, the range in which the facing portion 33 of the ink dam 16 can follow the displacement of the side end surface 2a of the ink fountain roller 2 (L2-L1). Becomes larger.

For this reason, even if the side end surface 2a is displaced in the direction of arrow D due to a temperature change of the ink fountain roller 2, abrasion of the side end surface 2a, etc. Since the ink 19 is in close contact with the end surface 2a, it is possible to prevent the ink 19 from leaking from between the contact surface 33a of the facing portion 33 and the side end surface 2a of the ink fountain roller 2.

Further, even if the processing accuracy of the facing portion 33 is somewhat poor, or the mounting accuracy of the ink dam 16 to the end-parting blades 8A and 8B is somewhat low, the facing surface 3 of the facing portion 33 can be used.
3 a comes into close contact with the side end surface 2 a of the ink fountain roller 2. For this reason, it is possible to prevent the ink 19 from leaking without increasing the processing accuracy and the assembling accuracy of the ink dam 16, so that the processing cost and the assembly cost can be reduced.

The ink dam 16 is made of an elastic nylon resin, and the opposing surface 33a of the opposing portion 33 is brought into close contact with the side end surface 2a of the ink fountain roller 2 by elastic deformation of the opposing portion 33. As a result, not only the leakage of the ink 19 can be prevented for a long time, but also the readjustment can be easily performed. In addition, ink cough 16
Is made of a nylon resin, and only a pair of opposed portions 32 and 33 formed in a forked shape are provided on one side, so that the structure of the ink dam 16 can be simplified.

The ink dam 16 of the present invention can be manufactured by simply forming a slit 34 and a pair of bifurcated opposing portions 32 and 33 and then forming a screw hole 35 by integrally molding with a nylon resin. Therefore, the number of processing steps for parts can be reduced. Further, since the number of parts is small, the number of assembling steps is reduced, and the shape is simplified, so that the manufacturing cost can be reduced. Further, when adjusting the pressing force of the contact surface 33a of the facing portion 33 against the side end surface 2a of the ink fountain roller 2, the operation is easy because only the bolt 36 needs to be rotated. In addition, ink cough 16
Can be replaced simply by unscrewing the bolt 17, so that replacement is easy.

The ink dam 16 is made of a nylon resin, but may be made of any other elastic material such as hard rubber, synthetic rubber, and metal. In addition, ink cough 16
May be formed of a material having a lower hardness than the side end surface 2a of the ink fountain roller 2 instead of the elastic material. In this case, when the contact surface 33a of the facing portion 33 of the ink dam 16 is pressed against the side end surface 2a of the ink fountain roller 2, the facing portion 33
Of the ink fountain roller 2 can be prevented without damaging the side end surface 2a of the ink fountain roller 2 without damaging the side end surface 2a of the ink fountain roller 2.

FIG. 5 is a plan view of an ink dam according to a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that
Is that the thickness w1 of the other opposing portion 33 in contact with the side end surface 2a of the ink fountain roller 2 is smaller than the thickness w2 of the one opposing portion 32. With this configuration, when the contact surface 33a of the other facing portion 33 is pressed against the side end surface 2a of the ink fountain roller 2 by the bolt 36 screwed into the one facing portion 32, the other facing portion 33 is pressed. The contact surface 33a is largely deformed and comes into close contact with the side end surface 2a. Therefore, as in the first embodiment, the facing portion 3
The ink 19 can be prevented from leaking out from between the contact surface 33a of the third ink cartridge 3 and the side end surface 2a of the ink fountain roller 2. In the second embodiment, the ink dam 16 can be formed of metal. In this case, the other opposing portion having a small thickness is plastically deformed, and the contact surface 33a is in close contact with the side end surface 2a. In this case, the facing unit 3
3 is a contact surface 3 that contacts the side end surface 2a of the ink fountain roller 2
Only 3a may be formed of an elastic material or a material having low hardness.

[0027]

As described above, claims 1 to 4
According to the present invention, the structure of the ink dam can be simplified, and the manufacturing cost can be reduced by reducing the number of processing steps and the number of assembly steps of the parts. In addition, the adjustment of the pressing force by the ink dam against the side end surface of the ink fountain roller is facilitated, and the exchange of the ink dam is also facilitated.

According to the second aspect of the present invention, it is possible to reliably prevent the ink from leaking.

According to the third aspect of the present invention, it is possible to reliably prevent the ink from leaking out, and to facilitate the processing of the ink dam.

[Brief description of the drawings]

FIG. 1 is a plan view showing only both end portions of an inking device of a rotary printing press according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3A and 3B show an ink weir of an inking device of a rotary printing press according to the present invention, wherein FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. 3C is a front view.

FIG. 4 is an enlarged side view showing an essential part for explaining the function of the ink dam of the inking device of the rotary printing press according to the present invention.

FIG. 5 is a plan view of an ink weir according to a second embodiment of the present invention.

[Explanation of symbols]

2 ... ink fountain roller, 2a ... side end face, 8 ... split blade, 9 ... holding plate, 16 ... ink crest, 18 ... ink fountain,
19 ... ink, 32, 33 ... facing part, 33a ... contact surface,
34 ... slit, 35 ... screw hole, 36 ... bolt.

Claims (4)

[Claims] 1. An ink fountain roller rotatably supported, a bottom plate provided with its tip close to the ink fountain roller, and substantially perpendicular to the bottom plate and in contact with both side end surfaces of the ink fountain roller, respectively. An inking device for a rotary printing press including a pair of ink dams having a contact surface, wherein the ink dam is provided with a pair of spaced-apart opposing portions formed in a forked shape, and screwed into one of the opposing portions. An inking device for a rotary printing press, wherein a contact surface of the other facing portion is pressed against a side end surface of the ink fountain roller by a bolt. 2. The inking device for a rotary printing press according to claim 1, wherein said ink dam is formed of an elastic material. 3. The inking device for a rotary printing press according to claim 1, wherein the ink dam is formed of a nylon resin. 4. The rotary printing press according to claim 1, wherein the thickness of the other opposing portion of the ink dam is formed relatively thinner than the thickness of the one opposing portion. Machine ink device.