JP2001038883A - Apparatus for supplying ink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save labor in cleaning work associated with the replacement of ink in a printing machine. SOLUTION: In the apparatus for supplying ink of a printing machine provided with an ink fountain roller, right and left side plates which is in sliding contact with the peripheral surface of the roller and forms an ink fountain, and an ink key forming the bottom part of the ink fountain, an ink tray 30 having side walls 31 corresponding to the side plates and a bottom plate 32 corresponding to the ink key is set in the ink fountain, and the tip parts 31a of the side walls 31 are arranged inside the side plates 22 to be laid on the side plates 22.

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 such as a rotary printing press or a sheet-fed printing press, and more particularly, to an ink supply device having an ink fountain provided with a detachable ink tray.

[0002]

2. Description of the Related Art A printing press such as a sheet-fed printing press or a rotary printing press is provided with an ink supply device 100 in which an ink fountain 102 is arranged in front of an ink source roller 101 as shown in FIGS. ing. The ink fountain 102 is an ink source roller 1
01, a plurality of ink keys (blades) 103 forming the bottom of the ink fountain 102, and two side plates 104 provided on both side surfaces of the ink key 103 and having front ends slidingly contacting the peripheral surface of the ink source roller 101 (see FIG. 7 shows only the back side)
It is composed of Then, the ink source roller 101
From the gap between the ink key 103 and the tip of the ink key 103
The ink inside is supplied to the ink source roller 101, and is transferred to a downstream ink roller group via a call roller (not shown).

As shown in FIG. 8, a plurality of ink keys 103 are arranged side by side in the lateral direction of the apparatus.
03, 103 and each ink key 103 on both ends and side plate 10
4 are in sliding contact with each other. Further, the ink keys 103 can swing independently about a fulcrum shaft 105, and an ink amount adjusting device 106 is provided below each ink key 103.

[0004] The ink amount adjusting device 106 includes a push-up fitting 106b that engages with the lower surface of the tip of each ink key 103, and a pusher 106a that contacts the push-up fitting 106b and swings the push-up fitting 106b by expansion and contraction. And
The tip of the ink key 103 is oscillated by moving the pusher 106b up and down by moving the pusher 106b up and down by appropriately expanding and contracting the pusher 106a, thereby adjusting the gap between the ink key 103 and the ink source roller 101. The thickness of the supplied ink film is adjusted.

[0005]

By the way, in the above-mentioned conventional ink supply device 100, the adjacent ink keys 10
Ink key 103 and side plate 1 between 3 and 103 and both ends
A small gap is secured between the first and second members 04 so that they can slide with each other. For this reason, there is a case where the ink penetrates into a small gap between the ink keys 103 due to a capillary phenomenon or the like. Thus, the ink keys 103, 1
If the ink that has penetrated from the gap 03 solidifies, the operation of the ink key 103 becomes unstable, or in the worst case, it does not work, making it impossible to control the ink film thickness with high accuracy. There were challenges.

[0006] After printing or when changing ink,
It is necessary to wipe off the remaining ink inside the ink fountain 102 with a rag or the like and wash it off with a cleaning liquid, but it is difficult to remove the ink due to its high viscosity.
In particular, it is difficult to remove the ink that has entered the gaps between the ink keys 103, 103, and the burden on the operator who performs cleaning is heavy. In order to improve productivity, it is necessary to shorten the preparation time for order change and improve the operation rate of the apparatus. You will spend a lot of time. For this reason, there has been a demand for an improvement in the operation rate of the apparatus and an improvement in productivity due to a reduction in the burden on the operator due to labor saving in the cleaning work and a reduction in the cleaning time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide an ink supply apparatus which enables labor saving of cleaning work accompanying ink exchange in a printing press.

[0008]

According to a first aspect of the present invention, there is provided an ink supply apparatus comprising: an ink supply roller; and an ink fountain formed by slidingly contacting a peripheral surface of the ink supply roller. An ink tray having side walls corresponding to the side plates and a bottom plate corresponding to the ink keys in an ink supply device of a printing press having left and right side plates to be formed and an ink key forming the bottom of the ink fountain. The end portion of the side wall is disposed inside the side plate and overlapped with the side plate.

According to a second aspect of the present invention, in the ink supply apparatus of the first aspect, a step is formed in the ink key, and the tip of the bottom plate is brought into contact with the step. I have. According to a third aspect of the present invention, there is provided the ink supply device according to the second aspect, wherein a step is formed on the side plate, and the seal member is continuous with the ink tray from a tip of the bottom plate to an outer surface of the side wall. Wherein the seal member is brought into contact with a step formed on the ink key and a step formed on the side plate.

According to a fourth aspect of the present invention, in the ink supply apparatus according to the third aspect, the tip of the side wall is inclined with respect to the bottom plate.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an ink supply device according to an embodiment of the present invention.
Is a side view showing a schematic configuration of the present ink supply device, and FIGS. 2 to 4 are diagrams showing a configuration of an ink tray according to the present ink supply device.

First, the schematic configuration of the present ink supply device will be described. As shown in FIG. 1, the ink supply device 2 includes an ink fountain 23 formed by a peripheral surface of an ink source roller 20, an ink key 21, and a side plate 22. During printing, ink is stored in the ink fountain 23 and supplied to the ink source roller 20. A plurality of ink keys 21 are closely arranged side by side in the apparatus width direction, and the rear end is rotatably supported by a support shaft provided on a support base 24. The side plate 22 is fixed to the support base 24 so as to sandwich the ink key 21 from both sides, and the front end thereof is in sliding contact with the peripheral surface of the ink source roller 20.

Below the ink fountain 23, a cross beam 5 for supporting each member constituting the ink fountain 23 is provided.
The cross beam 5 is provided with an ink amount adjusting device 25. The ink amount adjusting device 25 includes a push-up metal fitting 26 that engages with the lower surface of the tip of each ink key 21, and a pusher 27 that abuts the tip with the push-up metal fitting 26 and expands and contracts in the front-rear direction by turning the knob 28 or the motor 29. I have. Then, the tip of the ink key 21 is swung by moving the pusher 27 up and down about the fulcrum 26a by appropriately expanding and contracting the pusher 27.
The thickness of the supplied ink film is adjusted by adjusting the gap between the ink film and the ink. In addition, below the tip portion of the ink key 21, a first ink receiving the ink dropped from the ink key 21 is provided.
An ink receiver 6A and guides 6C and 6D for guiding the ink in the first ink receiver 6A to the second ink receiver 6B are provided.

The ink supply device 2 has a detachable ink tray 30 inside the ink fountain 23. The ink tray 30 is, as shown in FIGS.
Side wall 3 corresponding to left and right side plates 22, 22 of ink fountain 23
1, 3 and a bottom plate 3 whose tip side is inclined downward corresponding to the ink key 21 forming the bottom of the ink fountain 23.
It has two.

The lower surface of the bottom plate 32 is reinforced by a reinforcing plate 33, and the rear end of the bottom plate 32 extends outward and downward. This extended portion prevents ink from adhering to the support table 24. A cover 34 for prevention is formed. Brackets 36 are fixed to the upper ends of the side walls 31, 31 of the ink tray 30, respectively, facing outward.
A handle 37 is attached to the upper surface of the bracket 36.

The ink tray 30 covers most of each ink key 21 and each side plate 22 (this portion is referred to as a coated portion), so that it does not come into direct contact with the ink in the ink fountain 23. Ink base roller 20
The upper surface of the leading end of each ink key 21 and the inner surface of the leading end of each side plate 22 slidably in contact with the ink tray via the ink liquid film are provided on the ink tray 3.
It is exposed so as not to be covered with the ink 0 and directly in contact with the ink in the ink fountain 23 (this portion is called an exposed portion). That is, the inner peripheral surface of the ink fountain 23 is the inner surface of the ink tray 30 and the exposed portion (tip portion) 21A of each ink key 21.
, The exposed portion 22 </ b> A of each side surface 22, and the outer peripheral surface of the ink source roller 20.

The ink tray 30 is mounted in the ink fountain 23 by placing the left and right brackets 36, 36 on the side plates 22, 22 of the ink fountain 23, respectively. The positioning is performed by locking the ink tray 30 to the locking portion formed on the reference numeral 23. Here, a step 22a (see FIG. 6) is formed on the inner surface of the side plate 22 as an engaging portion, and the ink fountain 23 is formed.
Step 2 is formed on the top surface of the tip of the ink key 21 forming the bottom of the ink key 21.
1a is formed.

There are various possible positional relationships of the ink tray 30 with respect to the steps 22a, 21a.
Considering that the remaining ink is scraped out with a spatula or the like when cleaning the ink fountain 23, a from the bottom plate 32 of the ink tray 30 to the tip portion (exposed portion) 21A of the ink key 21 as shown in FIG. It is desirable to make them flush. In order to prevent ink from leaking from the gap between the tip 32a of the bottom plate 32 and the step 21a, the packing 38 is sandwiched with a holder 32c below the tip 32a.
It is desirable that the packing 38 be brought into contact with the step 21a.

On the other hand, as for the step 22a formed on the side plate 22, the exposed portion 22A of the side plate 22 of the ink fountain 23 from the side wall 31 of the ink tray 30 as shown in FIG.
It is conceivable to make the same time. However, in this case, it is necessary for the operator to visually perform the positioning in the left-right direction, and it is difficult to always accurately perform the positioning. Further, as shown in FIG. 5B, a holder 3 for holding the packing 38 for positioning in the left-right direction.
Although it is conceivable to make 1c contact the side plate 22, it is considered that the holder 31c is attached to the ink tray 30 later, so that a manufacturing error is larger than that of the ink tray 30 main body. In some cases, the holder 31c interferes with the side plate 22. Therefore, there is a possibility that the ink tray 30 cannot be mounted.

Further, as shown in FIGS. 5 (a) and 5 (b), when the surface 31 is to be flush from the side wall 31 to the exposed portion 22A of the side plate 22, the tip 31a of the side wall 31 is in contact with the bottom plate 32. If it is tilted, it is necessary to bend the packing 38 for sealing the gap between the side wall 31 and the side plate 22 into an unnatural three-dimensional shape as shown in FIG. It becomes difficult to hold the packing 38 at the connection portion with the seal 32.

Therefore, in the ink supply device 2, when the tip 31a of the side wall 31 has an ink tray 30 which is not perpendicular but inclined with respect to the bottom plate 32 as shown in FIG. 3, the position of the ink tray 30 with respect to the steps 22a, 21a. The relationship is set as follows: That is, ink key 2
1, the packing 38 is provided by the holder 32c provided on the lower surface of the bottom plate 32 as described above.
The packing 38 protrudes from the tip 32a of the bottom plate 32 and comes into contact with the step 21a, and the portion from the bottom plate 32 to the tip portion (exposed portion) 21A of the ink key 21 is flush.

On the other hand, as shown in FIG. 6A, a holder 31c is provided at a position slightly shifted rearward from the tip 31a of the side wall 31 for the step 22a formed on the side plate 22. The packing 38 sandwiched between the holders 32c provided on the lower surface is bent so as to be sandwiched between the holders 31c. Thus, the holder 31c is attached to the side wall 31.
The packing 38 is slightly shifted backward from the tip 31a of the side wall 31 by displacing the tip 38a backward from the tip 31a, but the packing 38 can be routed in a natural manner.

As shown in FIG. 6B, the outer width W1 between the side walls 31, 31 of the ink tray 30 is
22 is set slightly smaller than the inner width W2,
The tips 31a, 31a of the side walls 31, 31 are fitted between the base plates 2, 22, so that the part of the packing 38 held by the holder 31c contacts the step 22a. At this time, an overlapped portion 31b that overlaps with the exposed portion 22A is formed inside the exposed portion 22A of the side plate 22 on the side wall 31, but this overlapped portion 31b is exposed when the ink tray 30 moves left and right. The movement of the ink tray 30 is restricted by contacting the portion 22A.
That is, the end 31 of the side wall 31, 31 between the side plates 22, 22.
The ink tray 30 is positioned in the front-rear direction and at the same time in the left-right direction by fitting the a and 31a and bringing the packing 38 into contact with the step 22a.

If the length ΔL of the overlapped portion 31b is too large, there is a possibility that the side wall 31 may adhere to the side plate 22 due to the penetrated ink. Therefore, in the present ink supply device 2, the length ΔL of the overlapped portion 31b is set to such an extent that the left and right positioning is possible (for example, about 1.0 mm). The gap width ΔW of the overlapped portion 31b is
The tip 31a of the ink tray 3 interferes with the step 22a.
0 (for example, about 0.5 m
m).

Next, the fixing of the positioned ink tray 30 to the ink fountain 23 will be described. The fixing of the ink tray 30 is performed by the pressing tool 40 provided on the support base 24.
(See FIG. 1). That is, the rear inclined surfaces 36a of the left and right brackets 36 are pushed toward the tip end of the ink tray 30 by tightening the screws 41 provided on the pusher 40, and the holders 31c, 3
The ink tray 30 is fixed by pressing the seal member 38 sandwiched between 2c against the steps 22a and 21a of the ink fountain 23.

The front ends 36 of the left and right brackets 36
The positioning bolts 39 of the ink tray 30 are respectively provided at b. The positioning bolt 39 is brought into contact with the convex portion 22b provided on the upper surface of the side plate 22 to regulate the mounting position of the ink tray 30 in the front-rear direction. The position of the ink tray 30 in the front-rear direction can be adjusted by adjusting the amount of tightening of the positioning bolt 39, and the position in the height direction is adjusted by a height adjusting screw 35 provided on a bracket 36. I can do it.

Since the ink supply device according to one embodiment of the present invention is configured as described above, when exchanging the ink in the ink fountain due to an order change or the like, first, the device is stopped and the ink supply is stopped. The remaining ink in the urn 23 is collected using a spatula or the like. Then, the fixing of the ink tray 30 by the pressing tool 40 is released, and the ink tray 30 is taken out of the ink fountain 23 by holding the handle 37.

After the ink tray 30 is taken out, the remaining ink adhering to the tip of the ink key 21 and the side plate 22 is further wiped off with a rag or the like and washed with a cleaning liquid. The removed ink tray 30 is washed outside the ink replacement process. After the cleaning of the ink fountain 23 is completed, a new ink tray 30 is brought and mounted in the ink fountain 23.

The mounting of the ink tray 30 in the ink fountain 23 is performed in the following manner. First, the left and right brackets 36, 36 of the ink tray 30 are attached to the left and right side plates 2 of the ink fountain 23.
2, the ink tray 30 is temporarily placed in the ink fountain 23. Next, the step 22 of the left and right side plates 22
a while checking the positional relationship between the side wall 31 and the side wall 31.
The tips 31a, 31a of 1, 31 are fitted between the steps 22a, 22a. Then, the packing 38 is connected to each of the steps 21a, 21a.
Push forward until it touches 2a.

When the positioning in the front-rear direction is completed, the screw 41 of the pusher 40 is tightened, and the packing 38 is removed from the step 21.
a, 22a and the ink tray 30 and the ink fountain 2
3 and the ink tray 3 in the ink fountain 23 while sealing.
0 is fixed. At this time, if necessary, the position of the ink tray 30 is adjusted by adjusting the tightening amounts of the positioning bolt 39 and the height adjusting screw 35.

As described above, according to the present ink supply device,
By mounting the ink tray 30 in the ink fountain 23, the contact area of the ink key 21 with the ink can be significantly reduced. Therefore, the ink is used for the ink key 2
There is an advantage that the possibility of infiltration into the gap between the ink keys 21 and 21 is reduced, the operation of the ink key 21 is stabilized, and the inside of the ink fountain 23 is easily cleaned.

Further, it is not necessary to clean the dirty ink tray 30 at the time of ink replacement, and it is only necessary to replace it with a new one and remove it from the ink fountain 23 and then clean it by an external setup, thereby shortening the cleaning time at the time of ink replacement. As a result, there is an advantage that the operation rate of the apparatus can be improved and the productivity can be improved. Furthermore, according to the present ink supply device,
The positioning of the ink tray 30 in the ink fountain 23 is performed by setting the tips 31a, 31a of the left and right side walls 31, 31 to the steps 22a, 22a.
The packing 38 is inserted between the steps 21a, 2a.
The ink tray 30 can be easily and accurately attached to the ink fountain 23 because it is completed simply by pushing the ink tray forward until it comes into contact with the ink tray 2a. Therefore, the ink tray 30
The advantage is that the possibility of ink leakage from the gap between the ink tray and the ink fountain 23 is reduced, and the time required for mounting the ink tray 30 can be shortened to further improve productivity.

It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented with various modifications without departing from the spirit of the present invention. For example, in the above embodiment,
The case where the tip 31a of the side wall 31 is inclined with respect to the bottom plate 32 has been described as the shape of the ink tray 30,
Other angles may be applied, such as when the tip 31a of the side wall 31 is at a right angle to the bottom plate 32. Also in this case, by providing the overlapping portion between the side wall 31 and the bottom plate 32, the left and right positions can be determined mechanically.

[0034]

As described above in detail, according to the ink supply device of the present invention, the contact area between the ink key and the ink can be reduced by mounting the ink tray in the ink fountain. This greatly reduces the possibility of ink penetrating into the ink key gap, stabilizing the operation of the ink key, facilitating cleaning of the ink fountain, and shortening the cleaning time when changing ink. There is an advantage that productivity can be improved.

Further, since the tip of the side wall of the ink tray is arranged inside the side plate of the ink fountain and overlapped with the side wall, there is an advantage that the positioning of the ink tray in the left-right direction can be facilitated. Further, according to the ink supply device of the present invention, since the tip of the bottom plate is brought into contact with the step formed on the ink key, it is easy to position the ink tray in the front-rear direction. There is an advantage that can be.

Further, according to the ink supply apparatus of the present invention, since the continuous sealing member is brought into contact with the step formed on the ink key and the step formed on the side plate, the ink is supplied. There is an advantage that ink leakage from the gap between the tray and the step can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of an ink supply device as one embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of an ink tray according to the ink supply device as one embodiment of the present invention.

FIG. 3 is a side view illustrating a configuration of an ink tray according to the ink supply device as one embodiment of the present invention.

FIG. 4 is a side sectional view showing a state of engagement between an ink tray and a bottom plate of an ink tray according to the ink supply device as one embodiment of the present invention.

FIGS. 5A and 5B are cross-sectional views showing an engagement relationship between a side wall of an ink tray and an ink fountain created in the process of carrying out the present invention, wherein FIG. 5A is a view showing one example, and FIG. And (c) is a diagram for explaining the problems in (a) and (b).

6A and 6B are diagrams for explaining an engagement relationship between a side wall of an ink tray and an ink fountain according to the ink supply device as one embodiment of the present invention, and FIG. FIG. 4B is a side view showing a mounted state, and FIG. 4B is a cross-sectional view showing an engagement relationship between a side wall of the ink tray and the ink fountain.

FIG. 7 is a schematic side view showing a configuration of a conventional ink supply device.

FIG. 8 is a schematic top view of the inside of an ink fountain showing the configuration of a conventional ink supply device.

[Explanation of symbols]

 2 Ink Supply Device 20 Ink Source Roller 21 Ink Key 21a Step (Step) 22 Side Plate 22a Step (Step) 23 Ink Bottle 30 Ink Tray 31 Side Wall 31a Tip of Side Wall 31b Overlapping Part 32 Bottom Plate 32a Tip of Bottom Plate 38 Packing (Seal Member) )

[Procedure amendment]

[Submission date] November 18, 1999 (1999.11.
18)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, in the ink supply apparatus of the first aspect, a step is formed in the ink key, and the tip of the bottom plate is brought into contact with the step. I have. According to a third aspect of the present invention, in the ink supply apparatus of the second aspect , a seal member is provided at an end of the bottom plate.
Is brought into contact with a step formed on the ink key .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, there is provided the ink supply apparatus according to the third aspect, wherein the side wall of the ink supply apparatus is provided .
The tip edge is inclined with respect to the bottom plate, and the seal is
The member is shifted rearward from the leading edge on the outer surface of the side wall.
The bottom plate is provided continuously from the tip of the bottom plate . An ink supply device according to claim 5 of the present invention.
The ink supply device according to claim 4, wherein
A step is formed on the outer surface of the side wall of the sealing member.
Characterized in that the cut portion is locked to the step of the side plate.
I have.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

Therefore, in the present ink supply device 2, when the leading edge of the side wall 31 is provided with the ink tray 30 inclined not at a right angle to the bottom plate 32 but at an acute angle as shown in FIG. 30 are set as follows. That is, FIG.
As shown in FIG. 6, the packing 38 is held between the step 21a formed on the ink key 21 and the holder 32c provided on the lower surface of the bottom plate 32 as described above.
The packing 38 protrudes from the front end 32a of the
a from the bottom plate 32 to the tip portion (exposed portion) 21A of the ink key 21 (FIG. 5 (c)).
See] .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Furthermore, according to the ink supply device of the present invention described in claim 3, since adapted to contact the sheet seal member to <br/> stage difference formed in an ink key, and the tip of the bottom plate There is an advantage that it is possible to reliably prevent ink leakage from a gap with the step. Further, the present invention according to claim 4
According to the light ink supply device, the leading edge of the side wall is opposed to the bottom plate.
And seal the sealing member on the outer surface of the side wall.
From the end of the bottom plate at a position
The edge of the side wall faces the bottom plate
Bends into an unnatural three-dimensional shape even when
Remove the sealing member to the outer surface of the side wall in a natural
There is an advantage that it can be turned around. Claims
According to the ink supply apparatus of the present invention described in the item 5, the side plate has a step.
Formed on the outer surface of the side wall of the seal member
The ink tray is locked by the
Side plates while positioning the
Ink can be prevented from leaking from the gap between
The advantage is that ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 21, 2000 (200.3.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

According to a first aspect of the present invention, there is provided an ink supply apparatus comprising: an ink supply roller; and an ink fountain formed by slidingly contacting a peripheral surface of the ink supply roller. An ink tray having side walls corresponding to the side plates and a bottom plate corresponding to the ink keys in an ink supply device of a printing press having left and right side plates to be formed and an ink key forming the bottom of the ink fountain. The side wall is characterized in that only a predetermined range of the outer surface at the tip end of the side wall is overlapped with the inner surface of the side plate .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

In addition, at the outer surface of the tip of the side wall of the ink tray,
Since only the constant range is polymerized on the inner surface of the side plate of the ink fountain, both when it is possible to facilitate the positioning of the lateral direction of the ink tray, Lee by entering the ink overlapped portion
The side wall of the ink tray may stick to the side plate of the ink fountain.
There is an advantage that it is possible to prevent the door. Further, according to the ink supply device of the present invention, since the tip of the bottom plate is brought into contact with the step formed on the ink key, it is easy to position the ink tray in the front-rear direction. There is an advantage that can be.

Claims (4)

[Claims] 1. An ink supply device for a printing press, comprising: an ink source roller; left and right side plates forming an ink fountain by slidingly contacting the peripheral surface of the ink source roller; and an ink key forming a bottom portion of the ink fountain. In the above, an ink tray having a side wall corresponding to the side plate and a bottom plate corresponding to the ink key is mounted in the ink fountain, and a front end portion of the side wall is arranged inside the side plate and overlapped with the side plate. An ink supply device, characterized in that: 2. The ink key according to claim 1, wherein a step is formed on the ink key, and a tip of the bottom plate is brought into contact with the step.
An ink supply device as described in the above. 3. A step is formed on the side plate, and the ink tray is provided with a seal member which is continuous from a tip of the bottom plate to an outer surface of the side wall, and the seal member is attached to the step formed on the ink key and the side plate. The ink supply device according to claim 2, wherein the ink supply device is in contact with the formed step. 4. The ink supply device according to claim 3, wherein a tip of the side wall is inclined with respect to the bottom plate.