JP3224790B2 - Ink supply device for printing press and ink tray mounted on the device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for a printing press and an ink tray mounted on the device.
More specifically, the present invention relates to an ink supply device that can be installed in a rotary printing press, a sheet-fed printing press, and the like, and an ink tray mounted in the device.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show a general ink supply device installed in a sheet-fed printing press. The conventional ink supply device 51 includes an ink fountain 53 disposed in front of an ink source roller 52. Ink fountain 53
Are side plates 53a, 53a (only one side is shown) which are located at both ends in the axial direction of the ink source roller 52 and a part of the front end is slid in contact with the outer peripheral surface of the ink source roller, and ink forming the bottom surface. It is composed of a blade 54 and the like.

[0003] The ink blade 54 is provided with an ink source roller 5.
Ink keys 54a to 54a divided into a plurality in the axial direction
4n. Each ink key 54a to 54n
Can swing up and down independently about the fulcrum shaft 55. That is, by rotating the knob 56 or the motor 57 to appropriately expand and contract the pusher 58 and rotate the arm plate 59, the ink keys 54a to 54n can be swung up and down. By swinging and raising and lowering each of the ink keys 54a to 54n in this manner, it is possible to adjust the ink film thickness formed on the outer peripheral surface of the ink source roller 52 to be uniform in the axial direction of the roller.

The ink 60 supplied into the ink fountain 53 is
Outer peripheral surface of ink source roller 52 and ink keys 54a to 54
n is attached to the ink source roller through a gap with the leading end of n and is rotatably transported. Subsequently, the ink is transferred to a group of ink rollers via a call roller (not shown) which comes into contact with and separates from the ink source roller 52, and is used for printing. The outflow of the ink 60 from the ink fountain 53 in the axial direction of the ink fountain roller 52 is caused by the ink fountain roller and the side plates 53a, 5a of the ink fountain 53.
It is prevented by sliding contact with 3a. In addition, ink key 5
Ink 6 going to flow downward through 4a to 54n
0 is prevented by the sliding contact between the ink keys 54a to 54n adjacent to each other. In FIG. 11 , reference numeral 61 denotes an ink recovery tray, and in FIG. 12 , reference numeral 62 denotes a frame of the ink supply device 51.

[0005]

The above-described conventional ink supply device 51 has the following problems. (1) The ink 60 filled in the ink fountain 53 enters the gap between the adjacent ink keys 54a to 54n and solidifies, whereby the movement (vertical swing) of the ink keys 54a to 54n becomes unstable. There was a case. Further, the ink 6 is provided in the gap between the adjacent ink keys 54a to 54n over the entire area from the liquid level of the ink 60 filled in the ink fountain 53 to the tip of the ink keys 54a to 54n.
In the worst case, the ink keys 54a-5
4n could not move. (2) When cleaning the ink fountain 53, the remaining ink 6
It is difficult to eliminate 0, and in particular, it is difficult to remove the ink 60 that has entered the gap between the adjacent ink keys 54a to 54n. The present invention has been made in view of the above circumstances,
Provided is an ink supply device for a printing press, in which an ink key forming a bottom portion of an ink fountain can be operated stably and ink that has entered a gap between adjacent ink keys can be easily removed. Aim.

[0006]

According to the present invention, in order to achieve the above object, an ink supply roller and a plurality of ink supply rollers are arranged in the axial direction of the ink supply roller, and a tip end of the ink supply roller is rotated around a base end thereof. An ink fountain formed by a movable ink blade and side plates sandwiching the ink blade from both sides thereof, and by adjusting a gap between the ink blade and the ink source roller, the ink fountain is removed from the ink fountain. In an ink supply device for a printing press for controlling the amount of ink supplied to the ink supply roller, a bottom portion covering a portion of the upper surface of the ink blade excluding a tip portion thereof, and a side portion covering an inner surface of the side plate. An ink tray having an integral type, a first seal member interposed between the inner surface of the side plate and the side surface, and each of the ink blades and the ink cartridges Between the bottom portion of the over has a structure in which is interposed a second sealing member in contact with the sliding of said ink blade. Further, in the present invention, a plurality of ink source rollers are arranged in the axial direction of the ink source roller, and when adjusting the gap with the ink source roller, the tip portion rotates about its base end portion as a fulcrum. An ink tray inserted into an ink fountain of a printing press formed by an ink blade formed and a side plate sandwiching the ink blade from both ends thereof, and covering a portion of the upper surface of the ink blade except for a tip portion thereof. A bottom surface portion and a side surface portion covering the inner surface of the side plate are integrally formed, and a first seal member is interposed between the inner surface of the side plate and the side surface portion. The second seal member is attached to the ink fountain with a second seal member interposed therebetween so as to be always in contact therewith.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an ink supply apparatus for a printing press and an ink tray mounted on the apparatus according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 4
1 shows a first embodiment of an ink supply device for a printing press according to the present invention. The ink supply device 11 of the printing press according to the present embodiment includes an ink tray 13 that is detachably provided in an ink fountain 12. The ink fountain 12 is fixed to the frame of the apparatus main body, and includes side plates 12a, 12a positioned at both axial ends of the ink source roller 14, an ink blade 15 forming the bottom surface thereof, and the like (FIG. 1).
reference). The front ends of the side plates 12a, 12a are in sliding contact with the outer peripheral surface of the ink source roller 14. Ink blade 15
Is divided into a plurality of ink keys 15a to 15n in the axial direction of the ink source roller 14. These ink keys 15a to 15n are each independently swung up and down about a fulcrum shaft 16 by a plurality of driving devices 17.

The ink tray 13 has side portions 13a, 13a covering the inner surfaces of the left and right side plates 12a, 12a of the ink fountain 12.
a and a bottom portion 1 covering the ink blade 15 of the ink fountain.
3b to form an integral unit. In particular, the bottom surface portion 13b covers a portion of the upper surface of the ink blade 15 excluding the tip portion 15 '.
The material of the side surface portion 13 a and a bottom portion 13b, for example, stainless steel plate or the like, the thickness thereof is preferably about 1 mm, not particularly limited. A first seal member 18 is attached to the outer surface of the side surface portions 13a of the ink tray 13 at the ink source roller 14 side ends 13c, 13c in the depth direction of the ink fountain 12, respectively. A second seal member 19 is attached to the lower surface of the bottom portion 13b of the ink tray 13 at the end on the side of the ink source roller 14 in parallel with the axial direction of the ink source roller. The second seal member 19 is formed integrally with the first seal member 18 using the same material as the first seal member 18. As will be described later, the ink blade 15 is provided at the contact portion with the second seal member 19 at the second position.
Is slidably disposed with respect to the seal member 19.
The present invention is not limited to the above, and the first and second seal members 18, 18, and 19 may be attached to the side plate 12 a of the ink fountain 12 and the ink blade 15.

When the ink tray 13 is mounted in the ink fountain 12, the first seal members 18, 18
A stepped portion 20 on the ink source roller 14 side of a concave portion 20 formed on the inner surface of the side plates 12a on both sides of the ink fountain 12
a. Also, the second seal member 19
Is an ink source roller 14 having a substantially rectangular recess 21 formed on the upper surface of an ink blade 15 forming the bottom of the ink fountain 12.
Is contacted with the step portion 21a on the side (see FIGS. 1 and 2).
In other words, the second seal member 19 moves the stepped portion 21 of the ink blade in a direction (arrow Y direction in FIG. 1) substantially perpendicular to the sliding direction with the ink blade 15 (arrow X direction in FIG. 1).
a. First and second seal members 18, 1
8, 19, the side portions 13a, 1 of the ink tray 13
The space between the base plate 3a and the side plates 12a and 12a of the ink fountain 12 and the space between the bottom surface 13b of the ink tray 13 and the upper surface of the ink blade 15 of the ink fountain 12 are sealed on the ink source roller 14 side. This prevents the ink in the ink tray 13 from leaking between the ink tray and the ink fountain 12. The ink key 15
The steps 21a to 15n are formed on an arcuate curved surface centered on the fulcrum shaft 16 which is the rotation center of the movement for adjusting the ink amount of the ink key, or formed on a plane approximating this. Is preferred. That is, since the tip end portion 15 'of the ink blade 15 rotates around the fulcrum shaft 16 at the base end portion, the second seal is formed by making the shape of the step portion 21a in the step direction as described above. Member 19
The distance between the step portion 21a and the step portion 21a is kept constant, and the sealing property therebetween can be improved. In addition, the first and second
The seal members 18, 18, 19 of at least the stepped portion 2
It is preferable that the portion in contact with Oa and 21a is formed of an elastic material such as rubber, for example, silicon rubber or NBR. However, any material having elasticity may be used. Alternatively, a blanket for a blanket cylinder may be used.

As shown in FIG. 1, the driving device 17 is provided with a corner 23 to the lower surface of the tip 15 'of the ink keys 15a to 15n.
a, an arm plate 23 that swings about the fulcrum pin 22 and a pusher 26 that engages with the lower end of the arm plate and expands and contracts in the front-rear direction by turning the knob 24 or the motor 25. , And an encoder 27 for detecting the amount of movement of the pusher. The motor 25 is configured to expand and contract the pusher 25 by rotating a gear 28 fixed to the pusher 26 by a gear 29 attached to a shaft end of the motor.
The encoder 27 measures the number of rotations (angle) transmitted from the gear 28 fixed to the pusher 26 via the gear 30, and detects the amount of movement of the pusher.

Here, by appropriately rotating the knob 24 of the driving device 17, the pusher 26 is expanded and contracted (moved back and forth), and the arm plate 23 is swung. In response to this, the tips 15 'of the ink keys 15a to 15n with which the corners 23a of the arm plate 23 are in contact move up and down.
The gap between the tip of the ink key and the outer peripheral surface of the ink source roller 14 can be set to a desired size. Accordingly, the thickness of the ink film transferred and supplied to the outer peripheral surface of the ink source roller 14 can be easily adjusted, and the ink film thickness can be made uniform over the entire axial direction of the ink source roller. The detection signal from the encoder 27 is fed back to the motor 25 via a control device (not shown), and more accurate remote control is possible by controlling the number of rotations of the motor.

Further, the side portion 13 of the ink tray 13
a, brackets 31,
31 are fixedly mounted, and each bracket 31 has a handle 3
2a is attached (see FIGS. 2 and 3). Brackets 33, 33 are respectively fixed on the upper surfaces of the side plates 12a, 12a on both sides of the ink fountain 12, and levers 35 are rotatably attached to the respective brackets 33 via pins 34. . The lever 35 is a pin 34
Can be turned in the horizontal direction about the center of the ink fountain 12, and is parallel to the side plate 12a of the ink fountain 12 (in the direction perpendicular to the axial direction of the ink source roller 14) (hereinafter referred to as the operating position of the lever 35).
Then, it can be set to move to a position (hereinafter, referred to as an open position of the lever 35) that has turned to the outside of the side plate (to a direction parallel to the axial direction of the ink source roller 14).

A first plunger (positioning mechanism) in which a steel ball 36 is provided at one end (pin 34 side) of the lever 35 and a compression spring (not shown) is incorporated therein.
37 are provided. The steel ball 36 of the first plunger 37 pushed and urged by the compression spring is attached to the bracket 3.
By fitting into the conical hole formed on 3, the lever 35 can be temporarily fixed in its operating position. A second plunger (suppression mechanism) 38 is provided at the other end of the lever 35 (the swing end side of the lever 35). The second plunger 38 has a built-in spring 39. When the ink tray 13 is mounted in the ink fountain 12 and the lever 35 is set to its operating position, the plunger pin 38a is moved by the biasing force of the spring 39 to the inclined surface 32b of the handle 32a.
To press the ink tray toward the ink source roller 14. Due to the pressing force of the plunger pin 38a,
First and second seal members 18, 1 of ink tray 13
8 and 19 are pressed by the steps 20a and 21a of the ink fountain 12, respectively. Bolts (positioning mechanism) 40 for positioning the ink tray 13 are disposed on the left and right handles 32a, respectively. By contacting the positioning bolt 40 with the bracket 33 , the ink tray 13
Can be specified.

In the ink supply device 11 according to the present embodiment, when performing ink exchange accompanying an order change or the like, the ink supply device 11 is first stopped and the ink remaining in the ink fountain 12 is removed with an ink collection tray 41 using a spatula or the like. To be collected. Subsequently, the plunger pin 38a is lifted, and the levers 35 on both sides are respectively turned to the open positions. next,
With the handles 32a, 32a, the ink tray 13 is pulled out of the ink fountain 12, and the ink is wiped and washed externally. Ink remaining on the bottom of the ink fountain 12 fixed to the apparatus is wiped and cleaned with a rag or the like.
Thereafter, another ink tray 13 or the washed ink tray 13 is mounted and fixed in the ink fountain 12 by the operation reverse to the above, and is filled with new ink.

According to the ink supply device 11 of this embodiment, the ink tray 13 having the first and second seal members 18, 18, 19 as described above is detachably attached to the fixed ink fountain 12. Most of the ink to be filled into the ink fountain is provided by
Outer peripheral surface and both side surface portions 13 forming ink tray 13
a, 13a and the bottom portion 13b, and a part of the ink is not covered by the ink tray 13.
It only adheres to the ends of the side plates 12a, 12a on the side of the ink supply roller 14 and the tips 15 'of the ink keys 15a to 15n.

As is apparent from the above, the ink supply device 11 of the present embodiment has the following advantages. (1) The area (area) where the ink comes into contact with the ink keys 15a to 15n is much smaller than in the past, and the amount of ink clogging the gaps between adjacent ink keys is small. (2) There are few portions other than the ink tray 13, such as the ink keys 15a to 15n and the side plates 12a, 12a, which are stained with ink. (3) The cleaning of the ink tray 13 can be performed easily and quickly because the ink tray can be removed from the ink fountain 12 and can be performed outside the apparatus. According to the above (1) to (3), ink exchange and the like accompanying an order change and the like can be easily performed and the ink can be easily collected and cleaned, and can be omitted and the operation time can be shortened.
(4) The area (length) where the ink penetrates into the gap between the adjacent ink keys 15a to 15n is limited to only the tip 15 'of the ink key.
The problem that the operation of swinging up and down by 15n becomes worse is eliminated.

FIGS. 5 and 6 show a second embodiment of the ink supply device for a printing press according to the present invention. 5 and 6 for convenience of description.
Elements having the same functions as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. The ink supply device 11 of the printing press according to the present embodiment includes an end portion 13 c of the side surface portion 13 a of the ink tray 13, which is detachably disposed in the ink fountain 12, on the side of the ink source roller 14 and the sealing member 1.
8 is a curve corresponding to the shape of the outer peripheral surface of the ink source roller 14. Thereby, the portion of the ink fountain 12 that is stained with ink can be reduced, and ink replacement or the like accompanying an order change can be further facilitated. Other functions and effects are the same as those in the first embodiment.

FIG. 7 shows a third embodiment of the ink supply device for a printing press according to the present invention. For convenience of description, in FIG. 7, components having the same functions as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof will be omitted. The ink supply device 11 of the printing press according to the present embodiment includes a plate having a curved cross-sectional shape in which a front end portion 42a projects below the bottom surface 13b of the ink tray 13 toward the ink source roller 14 from the bottom surface of the bottom surface 13b. The elastic member 42 is provided. This allows
The bottom portion 13b of the ink tray 13 is connected to the ink keys 15a to 15
n is always contacted. For this reason, the fluctuation of the height of the ink key 13 with respect to the ink fountain 12 (change of the relative elevation position).
In the case where the occurrence of the above-mentioned condition, the contact state between the bottom surface portion 13b of the ink tray 13 and the ink blade 15 can be always maintained satisfactorily by the plate-shaped elastic member 42.

In this embodiment, a plate-like elastic member 42 is added to the ink fountain 12 of the first embodiment, and the plate-like elastic member is provided at the end 13d of the ink tray 13. Most of the tips 15 ′ of the ink keys 15 a to 15 n exposed from the end 13 d of the ink tray 13 in the first embodiment are covered by the plate-like elastic member 42. Therefore, the ink fountain 12 can be greatly reduced in stain as compared with the first embodiment. The plate-like elastic member 42
Can be fixed together with the second seal member 19 by various attachment methods such as fixing with a small screw 43 or fixing with an adhesive. Further, the plate-like elastic member 42 may be attached so as to be detachable from the ink tray 13. In addition, the first and second seal members 18, 18, 19 are provided on the ink tray 13.
Are arranged, and these are connected to the steps 20a, 21 of the ink fountain 12.
The configuration for pressing the button a is the same as that of the first embodiment.

FIGS. 8 to 10 show a fourth embodiment of the ink supply device for a printing press according to the present invention. For convenience of explanation, FIGS.
Elements having the same functions as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. The ink supply device 11 of the printing press according to the present embodiment forms the first and second seal members 18 and 19 in series by one and the same member, and the formed seal members are
It is designed to be removably attached to the camera. That is,
In this device, as is apparent from FIG.
The holders 45 having a substantially U-shaped cross section are provided at the end portions 13c, 13c, and 13d of the a, 13a and the bottom portion 13b on the side of the ink source roller 14, and a series of the sealing members (the first and second seal members) are provided in the holders. The seal members 18, 18, 19) are fitted and held. Thus, for example, when it is desired to wash the ink tray 13 for ink replacement, the ink tray 13 is pulled out of the ink fountain 12 and then the series of sealing members is pulled out of the holder 45. Since the ink tray 13 can be cleaned in this state, the cleaning of the seal portion near the holder 45 of the ink tray is also simplified, and the cleaning operation of the ink tray 13 can be performed easily and quickly. Become.

[0021]

As described above, according to the ink supply apparatus for a printing press according to the present invention, a plurality of ink supply rollers are arranged in the axial direction of the ink supply rollers, and the base end thereof is supported.
It has an ink fountain formed by an ink blade whose tip is rotated as a point , and side plates sandwiching the ink blade from both sides thereof, and adjusts a gap between the ink blade and the ink source roller. Thus, in an ink supply device of a printing press for controlling the amount of ink supplied from the ink fountain to the ink source roller, a bottom portion covering a portion of the upper surface of the ink blade excluding a tip portion thereof, and an inner surface of the side plate And an integral ink tray comprising a side portion that covers the ink tray, a first seal member interposed between the inner surface of the side plate and the side surface portion, and each of the ink blades and the bottom portion of the ink tray. Between,
Since the second seal member slidably contacting the ink blade is interposed, the following effects can be obtained. That is, in the present invention, since most of the ink blade is covered by the ink tray, the contact area (area) of the ink with the ink key is significantly smaller than in the related art. As a result, the space between these ink keys adjacent to each other becomes less clogged with ink, and the portion that becomes dirty with ink is reduced. Therefore,
The ink key that forms the bottom of the ink fountain can be operated stably, and the ink that has entered the gap between adjacent ink keys can be easily removed. In addition, since the ink tray can be removed from the ink fountain and removed outside the apparatus, ink collection and cleaning can be performed easily. Can be shortened. Furthermore, since the area where ink penetrates into the gap between adjacent ink keys is limited to a narrow area only at the tip of the ink key,
It is possible to eliminate as much as possible a problem that the operation of swinging and lowering the ink key is deteriorated.

Further, in the present invention, a plate-shaped elastic member is provided on the lower surface of the bottom portion of the ink tray, and the contact between the bottom portion of the ink tray and the ink key is always maintained via the plate-shaped elastic member. Therefore, fluctuation of the height of the ink key with respect to the ink fountain (change of the relative elevation position)
Even in the case of occurrence of the above, the contact state between the bottom surface of the ink tray and the ink blade can be always kept good by the plate-shaped elastic member. Further, in the present invention,
By forming the step portion of the ink key in contact with the second seal member into an arcuate curved surface substantially concentric with the center of rotation of the ink key for adjusting the amount of ink or a plane similar thereto. Even if the position of the ink key fluctuates due to ink amount adjustment, the contact state between the second seal member and the seal surface of the ink key does not change.
Therefore, a good seal between them can be maintained. Further, in the present invention, at least a portion of the first and second seal members that comes into contact with the step portion of the ink key is formed of an elastic body, so that the first and second seal members are formed of an elastic body.
In addition, good contact between the second seal member and the step portion of the ink key can be maintained. In addition, according to the present invention, the first and second seal members are formed in a series, and the series formed seal members are detachably mounted in a holder provided on the ink tray. Can be easily and quickly performed. Specifically, for example, washing of the ink tray can be easily performed in a state where the series of seal members is pulled out from the holder.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of an ink supply device for a printing press according to the present invention.

FIG. 2 is a perspective view showing a first embodiment of an ink supply device of a printing press according to the present invention, and particularly showing a state where an ink tray is arranged.

FIG. 3 is a plan view showing the appearance as viewed in the direction of arrow A in FIG.

FIG. 4 is a plan view showing a state seen from below a line BB in FIG. 1;

FIG. 5 is a longitudinal sectional view showing a second embodiment of the ink supply device of the printing press according to the present invention.

FIG. 6 is a perspective view showing a second embodiment of the ink supply device of the printing press according to the present invention, and particularly showing a state where an ink tray is arranged.

FIG. 7 is a perspective view showing a third embodiment of an ink supply device for a printing press according to the present invention, particularly showing a tip portion of an ink tray.

FIG. 8 is a side view showing a fourth embodiment of an ink supply device for a printing press according to the present invention, and particularly showing an ink tray of the fourth embodiment.

FIG. 9 is a front view showing the ink tray viewed in the direction of arrow C in FIG.

FIG. 10 is a cross-sectional view showing a state seen below the line DD in FIG. 8;

FIG. 11 is a diagram showing a partial longitudinal section of an ink supply device of a conventional printing press.

FIG. 12 is a plan view showing an ink supply device of a conventional printing press.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 ink supply device 12 ink fountain 12 a side plate 13 ink tray 13 a side portion 13 b bottom portion 13 c, 13 d end portion 14 ink source roller 15 ink blade 15 a to 15 n ink key 15 ′ tip end portion 16 fulcrum shaft 17 drive device 18 first seal member 19 second seal member 20, 21 recess 20a, 21a step 22 fulcrum pin 23 arm plate 23a corner 24 knob 25 motor 26 pusher 27 encoder 28, 29, 30 gear 31 bracket 32a, 32b handle 33 bracket 34 pin 35 lever 36 steel ball 37 first plunger (positioning mechanism) 38 second plunger (suppression mechanism) 38a plunger pin 39 spring 40 positioning bolt (positioning mechanism) 41 ink recovery tray 42 plate Sex member 43 machine screw 45 Holder

Claims (19)

(57) [Claims] 1. An ink source roller, a plurality of ink blades arranged in the axial direction of the ink source roller, the ink blade having a configuration in which a tip end part thereof rotates about a base end thereof, and the ink blade from both sides thereof An ink fountain formed by a sandwiching side plate, and adjusting a gap between the ink blade and the ink fountain roller to control an ink supply amount from the ink fountain to the ink fountain roller. In the apparatus, a bottom portion that covers a portion of the upper surface of the ink blade except for a tip portion thereof, and an integrated ink tray including a side portion that covers an inner surface of the side plate, and an inner surface of the side plate and the inner surface of the ink plate, A first seal member is interposed between the ink blade and the side surface, and the ink blade slides between each of the ink blades and the bottom surface of the ink tray. An ink supply device for a printing press, wherein a second seal member is provided in contact with the ink supply device. 2. The ink supply device for a printing press according to claim 1, wherein said ink tray is detachable from said ink fountain. 3. The ink supply device according to claim 2, wherein the first and second seal members are attached to the ink tray. 4. The ink tray according to claim 3, wherein said first and second seal members are detachable from said ink tray.
2. An ink supply device for a printing press according to claim 1. 5. The interposition position of the first and second seal members is near an end of the ink tray on the side of the side of the ink tray and the bottom of the ink tray.
5. The ink supply device for a printing press according to any one of items 4 to 4. 6. The ink supply device for a printing press according to claim 1, wherein said first and second seal members are continuous and integral seal members. 7. The printing press according to claim 1, wherein the second seal member contacts the ink blade in a direction substantially perpendicular to a sliding direction of the ink blade. Ink supply device. 8. The ink tray, wherein the second seal member is attached to the lower surface of the bottom portion of the ink tray on the side of the ink source roller, and a substantially rectangular recess is provided on the upper surface of the ink blade. The ink supply device for a printing press according to claim 1, wherein the first seal member is applied to a step portion on the ink source roller side. 9. An ink supply device for a printing press according to claim 8, wherein said second seal member is an elastic body. 10. A stepped shape of the step portion of the ink blade is a curved surface having a circular arc centered on a fulcrum at a base end portion of the ink blade or a shape substantially equal thereto. Or an ink supply device for a printing press according to item 9. 11. A plate-like elastic member having a tip portion projecting toward the ink source roller side from the bottom portion of the ink tray on a lower surface of an end portion of the bottom portion of the ink tray on the side of the ink source roller, The tip of the plate-shaped elastic member is brought into contact with the ink blade, and the bottom surface of the ink tray and the ink blade are always in contact with each other via the tip of the plate-shaped elastic member. The ink supply device for a printing press according to any one of claims 1 to 10. 12. The ink supply device according to claim 1, further comprising a mechanism for positioning the ink tray with respect to the ink fountain. 13. The ink supply device for a printing press according to claim 1, further comprising a suppression mechanism for suppressing the ink tray to the ink fountain. 14. An ink supply roller, and a plurality of ink supply rollers are arranged in the axial direction of the ink supply roller, and when adjusting a gap between the ink supply roller and the ink supply roller, a tip portion of the ink supply roller rotates about a base end thereof. An ink tray to be inserted into an ink fountain of a printing press formed by an ink blade and side plates sandwiching the ink blade from both ends thereof, and a bottom surface covering a portion of the upper surface of the ink blade except for a tip portion thereof. And a side portion that covers the inner surface of the side plate, and a first part is provided between the inner surface of the side plate and the side portion.
And a second seal member is attached to the ink fountain between the ink blade and the bottom surface of the ink tray so as to be always in contact therewith. Ink tray. 15. The ink tray according to claim 14, wherein the ink tray is detachable from the ink fountain. 16. The ink tray according to claim 15, wherein said first and second seal members are attached. 17. The ink tray according to claim 16, wherein the first and second seal members are detachable. 18. The ink tray according to claim 1, wherein the first and second seal members are mounted at the bottom of the ink tray and the side of the ink tray on the side of the ink supply roller.
18. The ink tray according to 6 or 17. 19. The ink tray according to claim 16, wherein said first and second seal members are continuous and integral seal members.