JPH08192511A - Ink calling device in printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the shock when ink is called and to call the ink smoothly and evenly. [Structure] An ink recalling roller 5 is rotatably supported by a roller receiver 7 on a frame, and the contact pressure between the ink fountain roller 2 and the ink recalling roller 5 is adjusted between the roller receiver 7 and the frame so that the roller receiver 7 is supported. An ink fountain roller pressure adjusting device 8 is provided so as to be swingable, and a kneading roller 3 and an ink feeding roller 5 are provided between a roller receiver 7 and a cam 9 for swinging the same.
By interposing a kneading roller pressure adjusting device 10 that adjusts the contact pressure with the cam 9 and transmits the operation by the cam 9, the shock of ink call is softened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink dispensing device in a printing machine.

[0002]

2. Description of the Related Art As shown in FIG. 4, an ink feeding device 1a in a conventional printing machine has an ink fountain roller 2, an ink feeding roller 5 and a kneading roller 3, and the ink feeding roller 5 is connected to the ink fountain roller 2. The ink 4 was conveyed from the ink fountain roller 2 to the kneading roller 3 by periodically rocking with the kneading roller 3. The ink ejecting roller 5 has a rubber plate of several mm wound around the roller surface.
The oscillating shaft 41 was directly oscillated by the cam. For this reason, the diameter of the ink feeding roller 5 is not accurate because the surface is covered with rubber, and is further deformed by use. In addition, since the diameter of the ink feeding roller 5 changes, the ink fountain roller 2 of the ink feeding roller 5
In addition, stopper devices 42 and 43 in the direction of the kneading roller 3 are provided so that the ink 4 far exceeding the required amount passes from the ink fountain roller 2 through the ink recalling roller 5 to the kneading roller 3
It was supposed not to be transported to the side. Therefore, the above-mentioned cam cannot use the entire stroke of the roller receiver 40 in order to swing the roller receiver 40 around the swing shaft 41. Further, since the ink fountain roller 2 rotates at a low speed and the kneading roller 3 rotates at a higher speed than that of the ink fountain roller 2, when the ink replenishing roller 5 swings between the rollers 2 and 3, a large shock is generated. Ink 4 did not transfer smoothly.

As a means for solving such a situation, an inking device 50 in an offset printing machine disclosed in Japanese Utility Model Laid-Open No. 54-11604 is known. This is, as shown in FIG. 5, arranged such that the ink feeding roller 5 is constantly brought into contact with the kneading roller 3 and is movable by a connecting rod 51 between a position in contact with the ink fountain roller 2 and a position separated therefrom. It was done.

[0004]

However, even in the inking device 50 in the above-mentioned offset printing machine, the ink fountain roller 2 is forcibly rotated so as not to supply the ink 4 more than necessary, and its rotation speed is increased. Is considerably slower than the kneading roller 3, and when the ink feeding roller 5 moves on the kneading roller 3 and comes into contact with the ink fountain roller 2, a shock due to a difference in the number of rotations is direct.
Printing is likely to occur due to shock eyes.

Therefore, the present invention has been made in view of the above circumstances, and can cope with the deformation of the ink feeding roller and softens the shock at the time of feeding the ink to smoothly and evenly feed the ink. An object of the present invention is to provide an ink recalling device for a printing machine that can perform the above.

[0006]

In order to solve the above problems, an ink feeding device in a printing machine of the present invention conveys ink by oscillating between an ink fountain roller, a kneading roller and both these rollers. In an ink feeding device in a printing machine having an ink feeding roller, the ink feeding roller is rotatably supported by a roller receiver on a frame, and the ink fountain roller and the ink feeding roller are provided between the roller receiver and the frame. Is provided with an ink fountain roller pressure adjusting device for adjusting the contact pressure of the roller receiver and allowing the roller receiver to swing, and between the kneading roller and the ink retrieving roller between the roller receiver and a cam for swinging the roller receiver. A kneading roller pressure adjusting device for adjusting the contact pressure and transmitting the operation by the cam is interposed.
Further, in an ink calling device in a printing machine having an ink fountain roller, a kneading roller, and an ink calling roller that swings between these rollers to separate from and contact with each other to convey ink, the ink calling roller can be freely rotated by a roller receiver in a frame. And a kneading roller pressure adjusting device for adjusting the contact pressure between the kneading roller and the ink replenishing roller between the roller receiver and the frame and for swinging the roller receiver. An ink fountain roller pressure adjusting device that adjusts the contact pressure between the ink fountain roller and the ink recalling roller and transmits the operation of the cam may be interposed between the roller receiver and the cam that swings the roller receiver.

Further, the ink fountain roller pressure adjusting device is preferably eccentric metal, and the kneading roller pressure adjusting device is preferably eccentric metal.

[0008]

According to the ink feeding device of the printing machine having the above structure, first, the contact pressure between the kneading roller and the ink feeding roller is adjusted by the kneading roller pressure adjusting device interposed between the roller receiver and the cam. In addition, the contact pressure between the ink fountain roller and the ink replenishing roller is adjusted by an ink fountain roller pressure adjusting device provided between the roller receiver and the frame, and then the ink fountain roller is operated to replenish the ink. With the double doctor and kneading roller pressure adjusting device, the entire stroke of the cam swings the roller receiver around the center of the swing, and the swing of the ink feeding roller follows the entire stroke of the cam, and the ink feeding The contact pressure of the roller with respect to the doctor and the kneading roller is also adjusted to reduce the shock at the time of rocking and to smoothly and uniformly eject the ink.

Further, the contact pressure between the kneading roller and the ink feeding roller is adjusted by a kneading roller pressure adjusting device provided between the roller receiver and the frame, and the contact pressure between the ink fountain roller and the ink feeding roller is adjusted. Even if the contact pressure between them is adjusted by the ink fountain roller pressure adjusting device interposed between the roller receiver and the cam, and then the ink fountain is activated by the operation, the same operation as above is performed.

Further, since the ink fountain roller pressure adjusting device is an eccentric metal, the swing core is immediately displaced by moving the eccentric metal. Furthermore, since the kneading roller pressure adjusting device is an eccentric metal, moving the eccentric metal causes the center of the swing to be immediately displaced.

[0011]

Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a side view showing an outline of an ink dispensing device in a printing machine according to the present invention, and FIG. 2 is a front view showing a part of the ink dispensing device in the printing machine according to the present invention. In the figure, an ink feeding device (hereinafter simply referred to as an ink feeding device) 1 in a printing machine according to the present invention separates and contacts the ink fountain roller 2, a kneading roller 3 and both these rollers 2 and 3 by rocking. And an ink fountain roller 5 for carrying the ink. An ink take-up roller 5 is rotatably supported on a frame 6 by a roller receiver 7, and an ink fountain roller 2 and an ink are provided between the roller receiver 7 and the frame 6. An ink fountain roller pressure adjusting device 8 for adjusting the contact pressure with the calling roller 5 and allowing the roller receiver 7 to swing is provided, and the roller receiver 7 and a cam 9 for swinging the roller receiver 7 are provided.
And a kneading roller pressure adjusting device 10 for adjusting the contact pressure between the kneading roller 3 and the ink feeding roller 5 and transmitting the operation by the cam 9.

The ink fountain roller 2 is located in the ink fountain 20 and supplies the ink 4 in the ink fountain 20 to the ink replenishing roller 5. The ink fountain roller 2 rotates at a peripheral speed considerably slower than that of the kneading roller 3. There is. This is because the ink 4 is supplied, and if the peripheral speed is high, the ink 4 may be scattered due to centrifugal force.

The kneading roller 3 is for receiving the ink 4 from the ink feeding roller 5, kneading the ink 4 to make the ink 4 uniform, and finally supplying the ink to the plate cylinder. It is rotating at the peripheral speed.

The ink feeding roller 5 swings between the ink fountain roller 2 and the kneading roller 3 to convey the ink 4 from the ink fountain roller 2 to the kneading roller 3, and the surface thereof is a rubber plate. Is wrapped around. The ink retrieving device 1 of the present invention is incorporated in the swing mechanism of the ink replenishing roller 5.

That is, the ink take-up roller 5 of the ink take-up device 1 has its shaft 5a rotatably supported by a roller receiver 7, and one end of the roller receiver 7 is a frame 6 by an ink fountain roller pressure adjusting device 8. It is swingably attached to. In this ink fountain roller pressure adjusting device 8, one end shaft 22a of an eccentric pin (excene metal) 22 is attached to a base 21 fixed to a frame 6, and the other end shaft 22b of the eccentric pin 22 is rotatably attached to a roller receiver 7. , The other end shaft 22b loosens the fixing bolt 24 in the long hole 23,
When the fixing bolt 24 is moved in the direction of arrow A in FIG. 1,
The eccentric pin 22 also moves, and the ink feeding roller 5
The nip width between the ink fountain roller 2 and the ink fountain roller 2 becomes wider, and when moved in the opposite direction, the nip width becomes narrower. By tightening the fixing bolt 24 at an appropriate position, the contact pressure between the ink take-up roller 5 and the ink fountain roller 2 is increased. To adjust.

Further, the other end of the roller receiver 7 and the cam 9 are
As described above, the kneading roller pressure adjusting device 10 is interposed between and. This kneading roller pressure adjusting device 10 has a pin 25
Is rotatably connected to one end of the calling rod 26 by means of the eccentric pin 28 between the other end of the calling rod 26 and one end of the calling lever 27. Further, the other end of the call lever 27 is fixed to an ink call shaft 29 rotatably attached to the frame 6, and one end of a cam lever 30 is fixed to the end of the ink call shaft 29 penetrating outside the frame 6. Then
A roller 31 is rotatably attached to the other end of the cam lever 30 so that the roller 31 transmits a rotation for calling.
It comes in contact with the cam 9 attached to the 32. Then, when the eccentric pin 28 interposed between the calling rod 26 and the calling lever 27 is loosened by fixing the fixing bolt 33 attached to the calling lever 27, the eccentric pin 28 is moved in the direction of arrow B in FIG. , The nip width between the ink feeding roller 5 and the doctor roller 2 is widened, and when moved in the opposite direction, the nip width is narrowed. By tightening the fixing bolt 33 at an appropriate position, the ink feeding roller 5 and the kneading roller 3 are separated. Adjust the contact pressure.

Next, a method of using the ink recharging device 1 having the above structure will be described. First, kneading roller pressure adjusting device
10, the ink feeding roller 5 to the kneading roller 3
Adjust the contact pressure of. That is, the fixing bolt 33 of the calling lever 27 is loosened, the eccentric pin 28 is moved to adjust the contact pressure, and then the fixing bolt 33 is tightened. next,
The ink fountain roller 2 is adjusted by the ink fountain roller pressure adjusting device 8.
The contact pressure of the ink feeding roller 5 with respect to is adjusted. That is, the fixing bolt 24 of the eccentric pin 22 provided between the roller receiver 7 and the frame 6 is loosened to remove the eccentric pin 22.
After adjusting the contact pressure by moving, tighten the fixing bolt 24. Then, when the printing machine is operated, the kneading roller 3 is forcibly rotated at the same speed as the peripheral speed of the plate cylinder, and the ink fountain roller 2 is forcibly rotated at a peripheral speed lower than that of the kneading roller 3. At the same time, the gear 32 is also forcibly rotated, so that the cam 9 also rotates and the cam lever 30 swings by the roller 31 along the shape of the cam surface. Along with this, the calling lever 27 and the calling rod 26 cause the roller receiver 7 to move. And the ink feeding roller 5 swings between the ink fountain roller 2 and the kneading roller 3, so that the ink 4 of the ink fountain roller 2 is conveyed to the kneading roller 3. At this time, the ink feeding roller 5 and the kneading roller 3
Is between the ink take-up roller 5 and the ink fountain roller 2 by the eccentric pin 28, that is,
Since the adjustment is performed in double, the swing core C of the roller receiver 7 is displaced from the roller core D of the ink dispensing roller 5, so that the swing width of the ink dispensing roller 5 is the same as that of the ink dispensing roller 5 adjusted in advance. The contact pressure between the kneading roller 3 and the ink fountain roller 2 is used, and even if the ink dispensing roller 5 is deformed to some extent, the entire process of the cam 9 cannot be used, and problems such as chic eyes occur. Instead, the ink 4 on the ink fountain roller 2 can be smoothly conveyed to the kneading roller 3.

The ink fountain roller pressure adjusting device 8 of the above embodiment is used for adjusting the contact pressure between the kneading roller 3 and the ink feeding roller 5, and the kneading roller pressure adjusting device 10 of the above embodiment is used as the ink fountain roller. Even when the contact pressure between the ink feeding roller 5 and the ink feeding roller 5 is adjusted, the same operation as above is performed.

[0019]

As described in detail above, according to the ink feeding device in the printing machine of the present invention, first, the contact pressure between the kneading roller and the ink feeding roller is interposed between the roller receiver and the cam. Adjust with the kneading roller pressure adjusting device, and adjust the contact pressure between the ink fountain roller and the ink replenishing roller with the ink fountain roller pressure adjusting device provided between the roller receiver and the frame, and then operate. Since the ink is discharged by the double doctor and the kneading roller pressure adjusting device, all the steps of the cam swing the roller receiver around the center of its swing, and the swing of the ink dispensing roller follows all the steps of the cam. By adjusting the contact pressure of the ink feeding roller against the doctor and the kneading roller, the shock at the time of rocking is reduced, and the ink feeding can be performed smoothly and uniformly. That. Therefore, it is possible to deal with the deformation of the ink feeding roller, reduce the shock at the time of feeding the ink, and prevent the occurrence of a printing failure due to a shock eye or the like.

The contact pressure between the kneading roller and the ink feeding roller is adjusted by a kneading roller pressure adjusting device provided between the roller receiver and the frame, and the contact pressure between the ink fountain roller and the ink feeding roller is adjusted. Even if the contact pressure between them is adjusted by the ink fountain roller pressure adjusting device interposed between the roller receiver and the cam, and then the ink fountain is operated to perform ink replenishment, the same action and effect as described above can be obtained.

Further, since the ink fountain roller pressure adjusting device is an eccentric metal, the core of the swing is immediately displaced by moving the eccentric metal. Therefore, it is possible to obtain the above effect with a simple operation.

Further, since the kneading roller pressure adjusting device is an eccentric metal, by moving the eccentric metal, the swing core is immediately displaced. Therefore, it is possible to obtain the above effect with a simple operation.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of an ink feeding device in a printing machine of the present invention.

FIG. 2 is a front view in which a part is shown, showing an ink dispensing device in a printing machine of the present invention.

FIG. 3 is a side view showing the outline of the operation of the ink feeding device in the printing machine of the present invention.

FIG. 4 is a side view showing an ink dispensing device in a conventional printing machine.

FIG. 5 is a side view showing an ink dispensing device in a conventional printing machine.

[Explanation of symbols]

1 Ink fountain device in printing machine 2 Ink fountain roller 3 Mixing roller 4 Ink 5 Ink fountain roller 6 Frame 7 Roller receiver 8 Ink fountain roller pressure adjusting device 9 Cam 10 Mixing roller pressure adjusting device 22, 28 Eccentric pin

Claims (4)

[Claims] 1. An ink ejecting device in a printing machine, comprising an ink fountain roller, a kneading roller, and an ink ejecting roller that swings between these rollers to separate and contact to convey ink. An ink fountain roller pressure adjusting device that rotatably supports the ink fountain roller and the frame by adjusting the contact pressure between the ink fountain roller and the ink replenishing roller and allowing the roller receiver to swing. And a kneading roller pressure adjusting device for adjusting the contact pressure between the kneading roller and the ink recalling roller and transmitting the operation by the cam is interposed between the roller receiver and the cam for swinging the roller receiver. An ink recalling device for a printing press, which is characterized in that 2. An ink feeding device in a printing machine having an ink fountain roller, a kneading roller, and an ink feeding roller which swings between these rollers to separate and contact the ink feeding roller to convey ink. A kneading roller pressure adjusting device is provided between the roller receiving member and the frame so that the contact pressure between the kneading roller and the ink recalling roller can be adjusted and the roller receiving member can be swung. In addition, an ink fountain roller pressure adjusting device for adjusting the contact pressure between the ink fountain roller and the ink recalling roller and transmitting the operation by the cam is interposed between the roller receiver and the cam for swinging the roller receiver. An ink recalling device for a printing press, which is characterized in that 3. The ink dispensing device for a printing press according to claim 1, wherein the ink fountain roller pressure adjusting device is an eccentric metal. 4. The ink feeding device for a printing press according to claim 1, wherein the kneading roller pressure adjusting device is an eccentric metal.