JP3694550B2 - Ink fountain device for printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink fountain device used for an offset printing press, a letterpress printing machine, and the like, and more particularly to an ink fountain device that can easily remove and clean ink on the inner surface of an ink fountain.
[0002]
[Prior art]
In offset printing machines or letterpress printing machines, the amount of ink supplied in accordance with the pattern must be changed during printing, and the ink supply zone is usually divided into multiple parts in the width direction of the pattern (approximately 30 mm pitch). However, a large amount of ink is supplied to a zone having a large area ratio, and a small amount of ink is supplied to a zone having a small area ratio.
In general, an ink fountain system is used for an inking device in an offset printing press or letterpress printing machine, and adjustment of the amount of ink to be supplied is performed by sliding a large number of ink keys arranged side by side in the width direction, This is done by changing the gap. This method has an advantage that the amount of ink supplied can be accurately controlled.
[0003]
By the way, in the ink device, cleaning is necessary when changing the item (color changing), and naturally the inner surface of the ink fountain is also cleaned. This ink fountain inner surface cleaning is difficult to automate and is usually performed manually by an operator.
[0004]
[Problems to be solved by the invention]
However, cleaning the inner surface of the ink fountain is a troublesome factor in improving productivity because it is troublesome. In addition, if the cleaning is insufficient, the ink may enter the gap between the keys and dry, which may cause the key to malfunction.
To solve these problems, a method has been proposed in which cleaning is simplified by attaching a film to an ink fountain and a key, and replacing the film at the time of cleaning. There are two methods for pasting a film: one for pasting a cut sheet and the other for pasting a continuous film and winding up a used film. However, in any method, the film is pasted only on the flat bottom surface of the ink fountain, and the inner surface (end surface) of the ink fountain is exposed or the end surface is covered with a small piece having a special shape. .
For this reason, this method requires a cleaning operation of the ink fountain end face or the cover piece, and also requires considerable manual work by the operator.
[0005]
The present invention has been made in view of the above-mentioned problems. In a printing machine such as an offset printing machine or a letterpress printing machine, the residual ink on the inner surface of the ink fountain can be easily removed and cleaned easily when changing items. It is an object of the present invention to provide an ink fountain device for a printing press that can be used.
[0006]
[Means for Solving the Problems]
The present invention made to achieve the above object is provided with an original roller, an ink fountain body which is disposed in proximity to the original roller and forms the bottom surface of the ink fountain, and is positioned at the lower end of the bottom surface of the ink fountain, An ink key capable of adjusting a gap with the original roller, an ink fountain side plate which is provided at both ends of the ink fountain body to form an ink fountain end surface, and a long protective film for protecting the inner surface of the ink fountain. A protective film drawn out from the protective film supply roll and passed through an ink key so as to cover the bottom surface of the ink fountain, and a portion of the protective film covering the bottom surface of the ink fountain is drawn outside the ink fountain, and the protective film A protective film transport device for running the protective film so that a new part drawn from the supply roll is positioned on the bottom surface of the ink fountain, The protective film has a width substantially equal to the bottom surface of the ink fountain, and has flap portions for covering the end surface of the ink fountain on both side edges thereof at a constant pitch in the longitudinal direction. The movable position of the ink fountain plate is retracted from the operating position at the both ends of the ink fountain and the retracted position that is lower than the operating position and does not interfere with the travel of the flap when the protective film travels. A gist of an ink fountain device for a printing press is provided with an ink fountain side plate driving device that is moved to a position.
[0007]
In the ink fountain apparatus configured as described above, the protective film covers the bottom surface of the ink fountain and the end surface of the ink fountain during normal printing to protect it from being smudged with ink. Moves the ink fountain side plate to the retracted position, and in that state, the protective film transport device runs the protective film and pulls out the part of the protective film covering the bottom surface of the ink fountain, and places the new part on the bottom surface of the ink fountain. After that, the ink fountain side plate driving device lifts the ink fountain side plate to its original operating position, and at this time, when the ink fountain side plate rises, the flaps formed on both sides of the protective film are folded inward, Position to protect side plate. Thus, the bottom surface of the ink fountain and the end surface of the ink fountain are covered with a new portion of the protective film, so that the next printing operation can be prepared, and the manual ink fountain cleaning operation that has been conventionally performed becomes unnecessary.
[0008]
Here, it is preferable that the flap portion formed on the protective film has a shape having an end surface protection portion covering the ink fountain end surface and a margin portion sandwiched between the original roller and the ink fountain side plate. . With this configuration, the flap covers and protects not only the surface of the ink fountain side plate (the end surface of the ink fountain) but also the end surface pressed against the original roller, ensuring that the ink fountain side plate is protected and the ink adheres. Can be prevented satisfactorily.
[0009]
In addition, a cylindrical member having an outer diameter substantially equal to the outer diameter of the original roller is disposed at both ends of the original roller so as to face the ink fountain side plate so as not to rotate even if the original roller rotates, In addition, it is preferable that a margin portion of the flap portion of the protective film is sandwiched and fixed between the ink fountain side plate. With this configuration, the margin of the flap portion can be fixed by being sandwiched between the cylindrical member and the ink fountain side plate, so that even if the flap portion contacts the surface of the rotating original roller, it is pulled and moved. In addition, the protective film can always be kept attached to the inner surface of the ink fountain during printing.
[0010]
Furthermore, the ink fountain body can be moved to an operating position for forming the ink fountain together with the original roller, and a retracted position retracted below the position, and a drive device for moving the ink fountain body is provided. preferable. With this configuration, when the protective film is moved, the ink fountain body is placed in the retracted position, so that the protective film can be easily moved and the force for moving the protective film can be reduced.
[0011]
As said protective film conveyance apparatus, it can be set as the structure provided with the winding roll which winds up a protective film. In this case, it is desirable to provide a residual ink removing device for scraping and removing the residual ink on the protective film upstream of the winding roll. If it is set as this structure, a protective film can be rolled up in the state which removed the residual ink, a used protective film can be wound up compactly, and the space which an apparatus requires can be made small.
[0012]
In addition, the protective film conveying device can be configured to include a driving roller that simply conveys the protective film. In that case, the protective film conveying device is separated from a cutting device that separates the fed protective film downstream of the driving roller. It is desirable to provide a waste film receiver for storing the protective film. With this configuration, the protective film with the used ink may be separated and simply put into the waste film receiver, and the structure of the apparatus becomes simple.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention shown in the drawings will be described. FIG. 1 is a schematic cross-sectional view showing an essential part of an inking device provided with an ink fountain device according to an embodiment of the present invention provided in an offset printing press or a relief printing press, and FIG. 2 is a schematic side view of the ink fountain device. 3 is a schematic plan view of the ink fountain device, FIG. 4 is a schematic plan view of a part of the protective film used in the ink fountain device, and FIGS. 5A, 5B, and 5C are the ink FIGS. 6A, 6B, 6C, and 6D are schematic sectional views and side views showing the ink fountain device in different operating states, respectively. . 1 to 6, 1 is a frame of a printing unit, 2 is an ink fountain device (details will be described later), 3 is an original roller constituting a part of the ink fountain device 2, 4 is a calling roller, and 5 is an ink kneading machine These are rollers, and these constitute an inking device that supplies ink to a plate cylinder (not shown).
[0014]
The ink fountain device 2 is positioned close to the original roller 3, the ink fountain body 7 that is disposed in proximity to the original roller 3 and forms a flat ink fountain bottom surface 7 a, and the ink fountain body 7 is positioned at the lower end of the ink fountain bottom surface 7 a. A plurality of ink keys 8 that can adjust the gap with the original roller 3, an ink key adjusting rod 9 for adjusting the position of the ink key 8, and both ends of the ink fountain body 7. An ink fountain side plate 10 or the like that forms the ridge end face 10a is provided. The ink fountain side plate 10 includes an arc surface 10b that is pressed against the outer peripheral surface of the original roller 3 to prevent ink leakage.
Further, the ink fountain side plate 10 is attached so as to be in contact with both outer surfaces 7b of the ink fountain main body 7 and so as to be pivotable about the support shaft 11, and is located at both ends of the ink fountain [FIG. a), a position shown in FIG. 6 (a)] and a retreat position lower than that position, preferably lower than the ink fountain bottom surface 7a [position shown in FIGS. 5 (b) and 6 (b)]. It is possible. The ink fountain side plate 10 is connected to an ink fountain side plate driving device (not shown) such as an air cylinder for reciprocating the ink fountain side plate 10 to the operating position and the retracted position.
[0015]
The ink fountain body 7 has an operating position where an ink fountain is formed together with the original roller 3 as shown in FIG. 6 (a), and is retracted below the operating position as shown in FIG. 6 (b). The bottom surface 7a is provided so as to be movable to a retreat position where the bottom surface 7a is substantially horizontal. The ink fountain body 7 is connected to a drive device (not shown) such as an air cylinder that reciprocates the ink fountain body 7 between an operating position and a retracted position.
[0016]
1 to 6, the ink fountain device 2 is further drawn out from a long protective film 15 for protecting the inner surface of the ink fountain, a protective film supply roll 16 for feeding out the protective film 15, and the protective film supply roll 16. The protective film 15 passed through the ink key 8 so as to cover the ink fountain bottom surface 7a is pulled out, and the protective film 15 is drawn out so that the new portion is positioned on the ink fountain bottom surface 7a. The protective film conveyance apparatus 17 which moves 15 is provided.
In this embodiment, a guide roller 18 that guides the protective film 15 and a winding roll 19 that winds up the protective film 15 are provided as the protective film conveying device 17, and a driving motor (not shown) is provided on the winding roll 19. Are connected. Further, a residual ink removing device 21 that scrapes and removes the residual ink 20 (see FIG. 6B) on the protective film 15 is provided upstream of the winding roll 19.
[0017]
As shown in FIG. 4, the protective film 15 used here has flap portions 15 b for covering the ink fountain end surfaces at both sides of a continuous constant width portion 15 a formed at a constant pitch in the longitudinal direction. . The width of the constant width portion 15a is set equal to the width of the ink fountain bottom surface 7a between the pair of ink fountain end faces 10a and 10a. The flap portion 15b is a substantially triangular end surface protection portion 15b that covers the end surface of the ink fountain. ₁ And the margin 15b provided subsequently ₂ The margin 15b ₂ Is for being sandwiched between the original roller 3 and the ink fountain side plate 10. Although the material which comprises the protective film 15 should just be a soft resin film, when very high printing quality is calculated | required, a polycarbonate film is desirable. In other cases, PET (polyethylene terephthalate), nylon, polypropylene film and the like are preferable.
[0018]
In FIG. 1 and FIG. 3, a winding length measuring roller 23 is arranged in the middle of conveying the protective film 15 drawn from the protective film supply roll 16 and connected to the rotary encoder 24. The rotary encoder 24 winds up the protective film 15 by the take-up roll 19 and measures the feed amount of the protective film 15 when feeding a new portion of the protective film 15 onto the ink fountain bottom surface 7a. The position (position where the flap portion 15b is provided) is provided so as to be correctly positioned on the ink fountain bottom surface 7a. The positioning when the protective film 15 is wound up is not limited to the case where the winding length measuring roller 23 and the rotary encoder 24 are provided, and can be appropriately changed. For example, as shown in FIG. The detection small holes 26 or marks are provided at a constant pitch, and the sensor detection small holes 26 or marks are detected by the photoelectric sensor 27 arranged in the transport path of the protective film 15 as shown in FIG. May be.
[0019]
In FIG. 3, cylindrical members 30 having an outer diameter substantially equal to the outer diameter of the original roller 3 are arranged at both ends of the original roller 3 so as not to rotate even when the original roller 3 rotates. A portion of the ink fountain side plate 10 that is in contact with the original roller 3 is formed thick and is pressed against both the original roller 3 and the cylindrical member 30.
[0020]
In addition, although illustration is abbreviate | omitted, the sequence control apparatus for performing the washing | cleaning operation | movement demonstrated below automatically is provided.
[0021]
Next, the operation of the ink fountain device 2 configured as described above will be described.
During normal printing, the ink fountain body 7 and the ink fountain side plate 10 occupy the operating positions shown in FIGS. 1, 5A, 6A, etc., and the protective film 15 covers the inner surface of the ink fountain. . That is, the fixed width portion 15a (see FIG. 4) of the protective film 15 covers the ink key 8 and the ink fountain bottom surface 7a, and the end surface protective portion 15b of the flap portion 15b. ₁ Covers the ink fountain end surface 10a, and the margin 15b. ₂ Is sandwiched between the ink fountain side plate 10, the original roller 3, and the cylindrical member 30. Printing is performed in this state. That is, in FIG. 1, the original roller 3 slowly rotates in the direction of the arrow, and the ink supplied into the ink fountain forms an ink film on the outer peripheral surface of the original roller 3, and the ink contacts the original roller 3. The ink is transferred to the calling roller 4 moved to the position, and then the ink is supplied by the operation in which the calling roller 4 moves to a position where it contacts the ink kneading roller 5 to transfer the ink to the ink kneading roller 5. During this operation, the inner surface of the ink fountain is covered with the protective film 15 as well as the bottom surface, so that the ink fountain body 7 and the ink fountain side plate 10 are not stained with ink. Further, since the original roller 3 rotates, a margin 15b of the protective film 15 sandwiched between the original roller 3 and the ink fountain side plate 10 is provided. ₂ May be pulled by the original roller 3, but this margin 15b ₂ Is sandwiched and fixed between the non-rotating cylindrical member 30 and the ink fountain side plate 10, so that the protective film 15 does not move and cause trouble. In addition, the slipperiness of the protective film 15 is good, and the margin 15b is formed by the cylindrical member 30 and the ink fountain side plate 10. ₂ Even if it is not fixed, the margin 15b that contacts the original roller 3 ₂ May be omitted if there is no fear of being pulled by the original roller 3.
[0022]
When cleaning the ink fountain after printing, press the cleaning button on the sequence controller. Then, as shown in FIG. 6B, the ink fountain body 7 is lowered to the retracted position, and the ink fountain side plate 10 is also lowered to the retracted position, so that the protective film 15 can be wound up. The protective film 15 can be rolled up with only the ink fountain side plate 10 lowered. However, if the ink fountain body 7 is also lowered, the winding force of the protective film 15 can be reduced and the bottom surface of the ink fountain can be obtained. 7a becomes horizontal and the discharge of the remaining ink 20 becomes easy, which is preferable.
[0023]
Next, the take-up roll 19 rotates to wind up the protective film 15 by a predetermined amount, wind up the portion soiled with the residual ink 20, and move a new predetermined portion of the protective film 15 onto the ink fountain body 7. At this time, the residual ink 20 on the protective film 15 is scraped off and removed by the residual ink removing device 21, so that it is prevented that a large amount of ink is caught in the take-up roll 19 to cause a trouble. . Further, flap portions 15b extend horizontally on both side edges of the protective film 15, but when the protective film 15 is rolled up, the ink fountain side plate 10 is retracted downward, so that the ink fountain side plate 10 is flapped. There is no interference with the running of the part 15b.
[0024]
After the protective film 15 moves, the ink fountain body 7 returns to the original operating position as shown in FIG. The state at this time is the state shown in FIG. 5B, and the flap portion 15b of the protective film 15 extends horizontally on both sides of the ink fountain bottom surface 7a. Next, the ink fountain side plate 10 pivots upward and moves while folding the flap portion 15b upward, and the margin portion 15b of the flap portion 15b is located between the curved surface 10b at the end, the original roller 3 and the cylindrical member 30. ₂ Insert and fix. Thereby, it will be in the state by which the protective film 15 was affixed on the ink fountain inner surface (ink fountain bottom surface 7a and ink fountain end surface 10a), and washing | cleaning operation | movement will be complete | finished. The operation of raising the ink fountain side plate 10 may be performed simultaneously with or before the operation of raising the ink fountain body 7, but the ink fountain body 7 is moved in order to prevent the fountain from entering the protective film 15 of the ink key portion. It is desirable to raise it first.
[0025]
As described above, the ink fountain cleaning operation is automatically performed, and the work burden on the worker is greatly reduced. The ink fountain cleaning operation is simultaneously performed for a plurality of printing units provided in the printing press. Thus, each ink fountain of the printing press can be easily cleaned in a very short time, and the stop time of the printing press can be shortened to improve productivity. In parallel with this ink fountain cleaning operation, the other rollers of the inking device are also cleaned. After the cleaning operation is completed, ink is supplied to the ink fountain and the printing operation is started.
[0026]
In the above-described embodiment, the ink fountain side plate 10 is provided so as to be pivotable about the support shaft 11 and is moved to an operating position located at both ends of the ink fountain and a retracted position lower than that. The movement of the side plate 10 is not necessarily limited to the turning method, but may be a sliding method. FIG. 9 shows an embodiment in that case, and the ink fountain side plate 10 is arranged so as to move in a straight line obliquely downward in contact with the outer surfaces 7b at both ends of the ink fountain main body 7. FIG. 9 (b), the ink fountain side plate 10 moves to a retracted position that is lower than the ink fountain bottom surface 7a, and from that position, the position shown in FIG. 9 (c) is obtained. It is connected to an ink fountain side plate driving device (not shown) such as an air cylinder so as to move to the operating position. Other configurations are the same as those of the embodiment shown in FIGS. In the embodiment shown in FIG. 9, the protective film 15 is wound up with the ink fountain side plate 10 moved to the retracted position shown in FIG. The flap portion 15b of the protective film 15 is positioned on the inner surface of the ink fountain side plate 10, that is, on the ink fountain end surface 10a by positioning the ink fountain bottom plate 7a and then pushing up the ink fountain side plate 10 to the position shown in FIG. The protective film 15 can be covered not only on the bottom surface of the ink fountain but also on the end surface, and the manual ink fountain washing operation that has been conventionally performed can be omitted.
[0027]
Furthermore, in the said Example, although the winding roll 19 is utilized as the protective film conveying apparatus 17 which makes the protective film 15 drive | work, the protective film conveying apparatus 17 is not restricted to this structure, It can change suitably. 10 and 11 show an ink fountain device provided with a protective film transport device 17A having another configuration. The protective film transport device 17A includes a drive roller 32 and a presser roller 33 that are disposed so as to sandwich and transport the protective film 15. Further, a cutting device 35 provided with a cutter 35a and an air cylinder 35b for cutting off the fed protective film 15 is disposed downstream of the drive roller 32, and a box-shaped waste film receiver 36 having an upper end opened below the cutting device 35. Is provided. In this embodiment, the protective film 15 is transported by the driving roller 32 and the pressing roller 33, the portion of the protective film 15 to which the residual ink is attached is directly put into the waste film receiver 36, and the upper end thereof is separated by the cutting device 35. The protective film 15 with the remaining ink attached is accumulated in the waste film receiver 36. Thus, since the discharged protective film 15 is simply discharged into the discharged film receiver 36, the structure is simplified as compared with the case where the winding roll is used as in the embodiment described above. Yes.
[0028]
【The invention's effect】
As described above, the present invention uses the ink fountain side plate that forms the end face of the ink fountain as the protective film disposed on the inner surface of the ink fountain and that has flap portions on both side edges. The ink fountain body is configured to move to the working position located at both ends of the ink fountain and to the retracted position lower than that position, so that the ink fountain bottom surface and ink fountain end surface are covered with a protective film during normal printing. When cleaning for color change, etc., move the ink fountain side plate to the retracted position, run the protective film in that state, pull out the part of the protective film that covered the bottom surface of the ink fountain, and Place the part on the bottom of the ink fountain, then lift the ink fountain side plate to its original working position, and fold the flaps formed on both sides of the protective film inward The ink fountain end surface can be protected, and the ink fountain bottom surface and the ink fountain end surface can be covered with a new part of the protective film very simply and quickly. It is possible to reduce the ink fountain cleaning operation that has been performed manually, and to shorten the stop time of the printing press, thereby improving the productivity.
[0029]
Here, when the flap portion formed on the protective film has a shape having an end surface protection portion covering the ink fountain end surface and a margin portion sandwiched between the original roller and the ink fountain side plate, the flap portion Covers and protects not only the surface of the ink fountain side plate (the end surface of the ink fountain) but also the end surface that is pressed against the original roller, ensuring the protection of the ink fountain side plate and preventing the ink from adhering well. can get.
[0030]
In addition, a cylindrical member having an outer diameter substantially equal to the outer diameter of the original roller is disposed at both ends of the original roller so as to face the ink fountain side plate so as not to rotate even if the original roller rotates, With a configuration in which a margin portion of the flap portion of the protective film is sandwiched between and fixed to the ink fountain side plate, the flap portion margin portion can be sandwiched and fixed between the cylindrical member and the ink fountain side plate, and the flap portion rotates. Even if it pulls in contact with the surface of the original roller inside, it does not move, and the effect that the protective film during printing can always be kept in a state of being satisfactorily adhered to the inner surface of the ink fountain can be obtained.
[0031]
Further, the ink fountain body can be moved to an operating position for forming the ink fountain together with the original roller, and a retracted position retracted below the position, and a drive device for moving the ink fountain body is provided. By placing the ink fountain body in the retracted position when moving the protective film, the protective film can move easily, the force to move the protective film can be reduced, and the protective film can be prevented from being damaged during the movement. The effect is obtained.
[0032]
Further, as a protective film conveying device for running the protective film, the protective film conveying device includes a winding roll for winding up the protective film, and the remaining ink on the protective film is scraped and removed upstream of the winding roll. If an ink removing device is provided, it can be rolled up in a state where residual ink is removed from the protective film, and the used protective film can be wound up compactly, reducing the space required for the device. The effect is obtained.
[0033]
Further, the protective film transporting device includes a driving roller for simply transporting the protective film, and a cutting device for cutting off the fed protective film and a discharge device for storing the separated protective film downstream of the driving roller. If the film receiver is provided, the protective film with the used ink may be simply separated and put into the waste film receiver, and the effect of simplifying the structure of the apparatus can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a main part of an inking device provided with an ink fountain device according to an embodiment of the present invention.
FIG. 2 is a schematic side view of the ink fountain device.
FIG. 3 is a schematic plan view of the ink fountain device.
FIG. 4 is a schematic plan view of a part of a protective film used in the ink fountain device.
5A, 5B and 5C are schematic perspective views showing the ink fountain device in different operating states, respectively.
6 (a), (b), (c), and (d) are schematic cross-sectional views or side views showing the ink fountain device in different operating states, respectively.
FIG. 7 is a partial schematic plan view showing another example of the protective film.
8 is a schematic cross-sectional view of an ink fountain device using the protective film shown in FIG.
9 is a schematic perspective view showing an ink fountain device according to another embodiment of the present invention, wherein (a), (b), and (c) are shown in different operating states.
FIG. 10 is a schematic perspective view showing an ink fountain device according to still another embodiment of the present invention.
11 is a schematic sectional view of the ink fountain device shown in FIG.
[Explanation of symbols]
1 Frame of printing unit
2 Inkwell device
3 original rollers
4 Calling rollers
5 Ink kneading roller
7 Ink fountain body
7a Inkwell bottom
8 Ink key
9 Ink key adjustment rod
10 Inkwell side plate
10a Inkwell end face
11 Support shaft
15 Protective film
15a constant width part
15b Flap part
15b ₁ End face protection
15b ₂ Room
16 Protective film supply roll
17, 17A Protection film transport device
19 Winding roll
20 Residual ink
21 Residual ink removal device
23 Rolling length measuring roller
24 Rotary encoder
30 Cylindrical member
32 Drive roller
33 Presser roller
35 Cutting device
36 Waste film receiver

Claims (6)

An original roller, an ink fountain body that is disposed close to the original roller and forms the bottom surface of the ink fountain, an ink key that is provided at a lower end of the bottom surface of the ink fountain, and that can adjust a gap with the original roller; An ink fountain side plate for forming an ink fountain end surface, and a long protective film for protecting the ink fountain inner surface, which is provided at both ends of the ink fountain main body, drawn from a protective film supply roll, and passed through an ink key A protective film passed to cover the bottom surface of the ink fountain, a portion of the protective film covering the bottom surface of the ink fountain is pulled out to the outside of the ink fountain, and a new portion pulled out from the protective film supply roll A protective film conveying device for running the protective film so as to be positioned on the bottom surface, and the protective film is substantially on the bottom surface of the ink fountain. A flap portion for covering the end face of the ink fountain at both side edges at a constant pitch in the longitudinal direction, and the ink fountain side plates are positioned at both ends of the ink fountain, An ink fountain side plate drive that is movable to a retracted position that is lower than the operating position and does not interfere with the travel of the flap when the protective film travels, and moves the ink fountain side plate to the operating position and the retracted position. An ink fountain device for a printing press, characterized in that a device is provided. The flap part of the said protective film has an end surface protection part which covers an ink fountain end surface, and the margin part pinched | interposed between the said original roller and an ink fountain side plate, It is characterized by the above-mentioned. Ink fountain device for printing machines. Cylindrical members having an outer diameter substantially equal to the outer diameter of the original roller are arranged so as not to rotate even if the original roller rotates, at positions opposite to the ink fountain side plate at both ends of the original roller. The ink fountain device for a printing press according to claim 2, wherein a margin portion of the flap portion of the protective film is sandwiched between and fixed to the ink fountain side plate. The ink fountain body is provided movably to an operating position where the ink fountain forms an ink fountain together with the original roller, and a retracted position retracted below the position, and a drive device for moving the ink fountain body is provided. The ink fountain device for a printing press according to any one of claims 1 to 3, wherein the ink fountain device is provided. The protective film conveying device is provided with a winding roll for winding up the protective film, and further, a residual ink removing device for scraping and removing residual ink on the protective film is provided upstream of the winding roll. The ink fountain device for a printing press according to any one of claims 1 to 4, wherein: The protective film conveying device includes a driving roller for conveying the protective film, and further, a cutting device for separating the fed protective film downstream of the driving roller, and a waste film receiver for accommodating the separated protective film. The ink fountain device for a printing press according to any one of claims 1 to 4, wherein the ink fountain device is provided.

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