JP4048000B2 - Ink divider for printing press - Google Patents

Description

[0001]
[Industrial application fields]
The present invention includes a fountain roller that performs ink discharge, and a blade that is disposed in proximity to the fountain roller and adjusts a gap between the fountain roller and adjusts the amount of ink supplied to the fountain roller. More particularly, the present invention relates to an ink partition device that can change an arrangement position in accordance with a change in an ink supply area of the fountain roller.
[0002]
[Prior art]
2. Description of the Related Art Generally, a printing press such as a newspaper printing press includes an ink storage unit for supplying necessary ink during its operation. Among such ink storage units, there are those that can change the width of the printing roll according to the change in the paper width and the range to be printed. For example, Japanese Patent Publication No. 36-18722 and Japanese Utility Model Publication No. 50- Various types have been proposed by Japanese Patent No. 13123, Japanese Patent Laid-Open No. 6-328671, Japanese Patent Laid-Open No. 10-315438, and the like.
[0003]
FIG. 4 is a perspective view of an ink supply unit of a printing press having an ink storage unit capable of changing the ink storage width.
The ink supply unit includes a fountain roller 1 that performs ink discharge, a blade 3 that is provided on the gantry 2 of the ink supply unit, and has a tip (not shown) close to the fountain roller 1, and an ink supply region of the fountain roller 1 And an ink partition device 10 disposed on both sides of the printer.
[0004]
The ink partition device 10 can be attached to and detached from the blade 3 with a bolt, a magnet, or the like, and the arrangement position can be changed according to the change in the width of the ink supply area of the fountain roller 1.
In the printing machine shown in the figure, an ink storage unit A is constituted by the ink partition device 10, the blade 3, and the outer peripheral surface of the fountain roller 1, and the ink 4 includes the outer peripheral surface of the fountain roller 1, the blade 3, the ink partition device 10, and the like. It is stored in the area surrounded by.
[0005]
The amount of ink supplied to the fountain roller 1 is adjusted by adjusting the gap between the tip of the blade 3 and the fountain roller 1. The clearance may be adjusted by moving the blade 3 forward and backward with respect to the fountain roller 1 along the upper surface of the gantry 2 by a driving mechanism (not shown) (this method is called a key method). It is good also as what rotates the said front-end | tip with respect to the fountain roller 1 (this system is called an undershot system).
[0006]
By the way, in order to prevent the ink 4 from leaking from the ink reservoir A, the ink partition device 10 needs to keep the side surface in contact with the fountain roller 1 and the bottom surface in contact with the blade 3 in a liquid-tight state (the ink does not leak out). There is. In particular, regarding the bottom surface in contact with the blade 3, liquid tightness must be maintained even when the blade 3 moves.
[0007]
In order to maintain liquid-tightness, it has been conventionally practiced to form a packing made of soft metal such as lead, resin, rubber, or felt on the side and bottom surfaces of the ink divider 10. The packing made of must be precision finished to adhere to the outer peripheral surface of the fountain roller 1 and the surface of the blade 3, is difficult to manufacture, and easily deforms plastically due to biting or collision of foreign matter. There is an inconvenience. Further, since soft metals and resins are poor in elasticity, they can be applied to the key type, but cannot be used for the undershot type.
[0008]
Although the rubber packing is easy to manufacture and difficult to plastically deform, the hard rubber is generally used from the viewpoint of wear resistance, and is not suitable for the undershot type because of insufficient elasticity. In the inking device disclosed in Japanese Utility Model Publication No. 50-34089, a packing is formed by a rubber magnet so that the packing can follow the rotation of the blade 3 of the undershot method. 4 and the like, there is a disadvantage that a gap is formed between the blade 3 and the packing, and the ink 4 is likely to leak out.
[0009]
Felt packing is excellent in elasticity and wear resistance, and there are no inconveniences as described above. However, due to its nature, ink is easily soaked, and the ink 4 soaked into the packing after long-term use is outside the ink supply area of the fountain roller 1. When the color of the ink 4 is changed, the ink 4 of a different color that has soaked into the packing 4 may ooze out and deteriorate the print quality.
[0010]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems, and an object thereof is to provide an ink partition device that solves the above-described problems all at once and is suitable for both the key method and the undershot method.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is arranged so that the position can be changed on both sides of an ink supply area of a fountain roller for performing ink discharge, and is disposed close to the fountain roller and a side surface in contact with the outer peripheral surface of the fountain roller. And an ink partition for storing ink between the blade and the blade in the ink supply region. In the apparatus, a groove (14) is formed over the entire length of the bottom surface in contact with the blade, and the boundary between the blade and the bottom surface is liquid-tightened by being pressed against the blade in the groove (14). A blade for adjusting the amount of ink to be supplied and formed with a material that does not penetrate the ink. Fitting the packing is elastically deformed following the displacement,
Two parallel grooves (15) from the top of the side surface to the bottom surface are formed without interfering with the groove (14), and the boundary between the fountain roller and the side surface is formed by being pressed against the fountain roller. While keeping liquid-tight, the packing formed with the material which does not permeate the ink is fitted.
[0012]
According to a second aspect of the present invention, the packing may be provided with elasticity improving means so that the packing can be elastically deformed following the displacement of the blade. Such elasticity improving means may be a cavity or a large number of pores formed inside the hard rubber, as shown in claim 3 or 4, or a lip portion formed outside the hard rubber. May be.
[0013]
According to this configuration, the ink does not soak into the packing unlike felt. In addition, since it is elastically deformed following the displacement of the blade, even if the blade is displaced, there is always liquid-tightness between the side surface of the ink partition device and the fountain roller and between the bottom surface of the ink partition device and the blade. The packing does not easily separate from the outer peripheral surface of the fountain roller or the surface of the blade even if the ink is stirred.
Furthermore, since the packing having the above requirements can be easily manufactured simply by forming pores or cavities inside the hard rubber or forming a lip portion outside, the cost is low.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of an ink partition device according to an embodiment of the present invention, and FIG. 2 is a side view of the ink partition device of this embodiment viewed from the direction of arrow II in FIG.
The two ink partitioning devices 10 arranged on both sides of the ink supply area of the fountain roller 1 have no change in configuration, so only one will be described and detailed description of the other will be omitted.
[0015]
The ink supply device in this embodiment is of an undershot type in which the gap is changed by the blade 3 rotating with respect to the fountain roller 1. The blade 3 has a free end 5 that protrudes from the gantry 2 toward the fountain roller 1, and the free end 5 is formed to be positioned slightly below the outer peripheral surface of the fountain roller 1. The tip of a rod 6 that can be moved forward and backward by a drive mechanism (not shown) abuts on the free end 5 and pushes the free end 5 toward the fountain roller 1 side. When the drive mechanism is driven and the rod 6 moves forward and backward in the direction indicated by the arrow in FIG. 1, the free end 5 is displaced in conjunction with the forward and backward movement, and the gap with the fountain roller 1 is changed.
[0016]
The main body 11 of the ink partition device 10 is formed in a substantially triangular shape as a whole. And a bottom surface 13 formed in a stepped shape in accordance with the shape.
A magnetic force adsorption device 20 for detachably attaching the ink partition device 10 to the mount 2 is attached to the front surface of the main body 11 facing the outside of the ink reservoir A by bolts 23. The magnetic force adsorbing device 20 selectively switches between magnetic force generation and magnetic force erasure by rotating a lever 22 to move a built-in magnet (not shown) closer to or away from the bottom surface 2a of the gantry 2. For example, it is a known one described in the above-mentioned Japanese Patent Laid-Open No. 10-315438.
[0017]
A groove 14 is formed at substantially the center of the bottom surface 13 over the entire length of the bottom surface 13, and an elastic packing 30 is fitted into the groove 14. As a material for forming the packing 30, any material can be selected as long as it is liquid-tight and does not soak ink. Further, the side surface 12, as shown in FIG. 2, in a state that does not interfere with the groove 14, two grooves 15, 15 parallel to the upper reach to the bottom 13 of the body 11 is formed, the elastic in the grooves 15, 15 The packing 30 having the above is fitted.
[0018]
The packing 30 is preferably an NBR (nitrile) rubber that is not easily worn by the rotation of the fountain roller 1 and is excellent in wear resistance and oil resistance.
In addition, the packing 30 can be elastically deformed following the displacement of the blade 3 to adjust the ink amount, and can maintain the contact state with the outer peripheral surface of the fountain roller 1 and the blade 3. . For example, in an ink supply device of a newspaper printing press, the displacement amount of the blade 3 is about 0.6 mm to 0.9 mm, and it is sufficient if it can be elastically deformed and maintain a liquid-tight state within this range. It is.
[0019]
The packing 30 may be formed so as to have elasticity as described above by appropriately selecting the material thereof, but the elasticity improving means can be easily elastically deformed by following the displacement of the blade 3. It is good to provide.
An example of such elasticity improving means is shown in FIG. FIGS. 3A to 3C show an embodiment of the elasticity improving means, and show a cross section taken along the line II in FIG.
[0020]
In the example shown in FIG. 3A, the packing 31 is composed of a rubber sealing material 31b excellent in wear resistance and a rubber 31a excellent in elasticity. A rubber 31a is fitted on the bottom side of the grooves 14, 15, and a sealing material 31b is fitted thereon. When the ink partition device 10 is pressed against the outer peripheral surface of the fountain roller 1 or the blade 3, the rubber 31 a is mainly elastically deformed and presses the sealing material 31 b against the outer peripheral surface of the fountain roller 1 or the blade 3. When the blade 3 is displaced in the direction of widening the gap, the external force acting on the rubber 31a is weakened, and the rubber 31a expands to that extent, so that the sealing material 31b is always pressed against the blade 3 following the displacement of the blade 3. Will be.
In addition, you may use not only the rubber | gum 31a but another member, for example, felt, as long as it is excellent in elasticity.
[0021]
In the example shown in FIG. 3B, the rubber packing 32 has a lip portion 32a extending toward the bottom of the groove 14 (15). When the ink divider 10 is pressed against the outer peripheral surface of the fountain roller 1 or the blade 3, the lip portion 32 a is mainly elastically deformed and presses the packing 32 against the outer peripheral surface of the fountain roller 1 or the blade 3. When the blade 3 is displaced, the external force acting on the lip portion 32a is weakened, and the lip portion 32a pushes back the packing 32 accordingly, so that the packing 32 is always pressed against the blade 3 following the displacement of the blade 3.
[0022]
In the example shown in FIG. 3C, the rubber packing 33 has a large number of holes 33a therein. Even if the rubber itself forming the packing 33 is hard, by forming a large number of such holes 33a inside, the packing 33 becomes sponge-like and has sufficient elasticity to follow the displacement of the blade 3. Can have.
[0023]
In the example shown in FIG. 3 (d), a cavity 34 a is formed over the substantially entire length of the packing 34 in the center of the packing 34 instead of the hole 33 a. As a result, the packing 34 has sufficient elasticity.
In the example shown in FIGS. 3B to 3D, the lip portion 32a, the hole 33a, or the cavity 34a may be filled with an elastic material such as rubber having excellent elasticity.
[0024]
Next, the operation of the ink partition device having the above configuration will be described with reference to FIGS.
According to the width of the ink supply area of the fountain roller 1, the ink partitioning device 10 is arranged on both sides of the ink supply area, and the lever 21 of the magnetic adsorption device 20 is turned while pressing the side surface 12 against the outer peripheral surface of the fountain roller 1. And fixed to the bottom surface 2 a of the gantry 2. The packing 30 having elasticity is elastically deformed by the adsorption force and the pressing force of the magnetic adsorption device 20, and the fountain roller 1, the blade 3, the bottom surface 2a, the side surface 12, and the bottom surface 13 are brought into a liquid-tight state. In this state, ink 4 (see FIG. 4) is poured into the ink reservoir A.
[0025]
In order to change the amount of ink 4 supplied to the fountain roller 1, when a rod 6 is moved forward and backward by driving a drive mechanism (not shown), the free end 5 of the blade 3 is displaced up and down accordingly. Change the gap between.
Although the distance between the tip 5 of the blade 3 and the bottom surface 13 of the main body 11 changes due to the displacement of the free end 5, the packing 30 is elastically deformed following this, so that the liquid-tight state is maintained.
[0026]
Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments.
For example, although it has been described that two parallel grooves 15 are formed on the side surface 12 of the main body 11 and a single groove 14 is formed on the bottom surface 13, the number of these grooves 14, 15 is the number of the ink storage portion A. The size can be appropriately changed according to the size and the size of the main body 11. In the above description, the under-shot type ink supply apparatus has been described as an example. However, the present invention can be applied regardless of the key type or the under-shot type.
[0027]
【The invention's effect】
Since the present invention is configured as described above, it is easy to manufacture the packing and the cost is low, and it is also possible to prevent a decrease in print quality due to ink soaking.
In addition, the ink partition device of the present invention can be applied to both a key method and an undershot method, and between a printing machine having a key type ink supply device and a printing machine having an undershot type ink supply device. It becomes possible to share the same ink partition device.
Furthermore, since grooves can be formed on the side and bottom of the main body of the ink divider and the packing can be easily assembled by simply inserting the packing into the groove, it is very easy to replace even if the packing is worn. And can be done quickly.
[Brief description of the drawings]
FIG. 1 is a front view of an ink partition device according to an embodiment of the present invention.
FIG. 2 is a side view of the ink partition device of this embodiment viewed from the direction of arrow II in FIG.
FIGS. 3A to 3C are cross-sectional views taken along the line II in FIG. 1 according to the embodiment of the elasticity improving unit.
FIG. 4 is a perspective view of an ink supply unit of a printing press having an ink storage unit capable of changing the ink storage width.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fountain roller 2 Base 3 Blade 4 Ink 5 Front end 6 Rod 10 Ink partition device 11 Main body 12 Side surface 13 Bottom surface 14, 15 Groove 20 Magnetic adsorption device 22 Lever 30 Packing 31-34 Packing 31a-34a Elasticity improvement means A Ink storage part

Claims (4)

The fountain roller that performs ink discharge is disposed on both sides of the ink supply region so that the position of the fountain roller can be changed, and the gap between the fountain roller and the side surface that is in contact with the outer peripheral surface of the fountain roller is disposed close to the fountain roller. In the ink partition device that has a bottom surface in contact with a blade that adjusts the amount of ink supplied by adjusting, and stores ink between the blade in the ink supply region,
A groove (14) is formed over the entire length of the bottom surface in contact with the blade, and the boundary between the blade and the bottom surface is kept fluid-tight by being pressed against the blade in the groove (14) . Inserting a packing that is formed of a material that does not soak in the ink and elastically deforms following the displacement of the blade for adjusting the amount of ink to be supplied ,
Two parallel grooves (15) from the top of the side surface to the bottom surface are formed without interfering with the groove (14), and the boundary between the fountain roller and the side surface is formed by being pressed against the fountain roller. An ink partitioning device for a printing press, which is fitted with an elastically deformable packing made of a material which is kept liquid-tight and does not soak into the ink. 2. The ink partition device for a printing press according to claim 1, wherein the packing is provided with an elastic improvement means so that the packing can be elastically deformed following the displacement of the blade. 3. The ink partitioning device for a printing press according to claim 2, wherein the packing is formed by forming the elasticity improving means including cavities or a large number of pores inside a hard rubber having wear resistance. The ink partition device for a printing press according to claim 2, wherein the packing is formed with an elasticity improving means formed by forming a lip portion outside the hard rubber.

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