JPS61120752A - Ink transfer interrupter for rotary press - Google Patents

Abstract

PURPOSE:To print efficiently, by providing an operating mechanism for oscillating a ductor roller in conjunction with the rotation of a form cylinder, and a restricting mechanism for restricting the roller to a position spaced from a fountain roller by a turning link in the oscillation. CONSTITUTION:A piston rod in a cylinder 23 is retracted so that a contact surface 21 of the link and a projection 22 of a roller lever 10 are spaced from each other. By this, a sector gear 12 is set into reciprocative turning based on the rotation of the form cylinder 5, whereby the roller lever 10 is pushed against a tensile force of a tension spring by a link pin 16, an ink roller 8 constantly in contact with the fountain roller 6 is moved to the side of an ink distributing roller 7, and the ink roller 8 is again returned to the side of the fountain roller 6 by the tension spring, the movements being repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ink transfer interrupting device in a rotary printing press.

In a rotary printing press, the mechanism that transfers the required amount of ink from the fountain roller to the mixing roller is a mechanism that transfers the required amount of ink from the fountain roller to the mixing roller by repeating the movement between the fountain roller and the mixing roller alternately by pendulum motion. This is done by contacting ink transfer rollers. The pendulum motion of the ink transfer roller is caused by a link mechanism operated by a cam mounted on the plate cylinder or on another rotating shaft.

<Problems to be Solved by the Invention> In the conventional mechanism described above, the ink transfer roller continues its pendulum movement in contact with the fountain roller and the kneading roller during machine operation. Therefore, if printing is interrupted during printing, or if it is necessary to temporarily limit the amount of ink supplied, the machine operation will be stopped each time.
0 Therefore, there are some problems that are having a negative impact on improving printing work efficiency.

The present invention makes it possible to interrupt ink transfer without stopping the operation of the machine, and is an attempt to improve the above-mentioned conventional problems.

tth Means for Solving the Problems> The present invention provides an apparatus in which ink is transferred between a fountain roller and a mixing roller, and the roller moves in a pendulum manner to transfer ink from the fountain roller to the mixing roller. an actuation mechanism that causes the ink transfer roller to have a pendulum motion with a required play in conjunction with the rotation of the ink transfer roller, and a link that rotates due to the operation of the cylinder to restrict the ink transfer roller to a position separated from the fountain roller. It consists of a mechanism for suppressing the range of pendulum movement that causes pendulum movement.

Function> According to the present invention, the ink transfer roller, which is brought into contact with the fountain roller and the kneading roller in an oscillating manner by the operation of the machine, is moved away from the fountain roller by the operation of the cylinder, and moved to the separated position. Ink transfer is interrupted without stopping the machine by restricting the pendulum movement to a range where the fountain roller does not come into contact with the pendulum.

<Example> Hereinafter, an example of the present invention will be explained based on @ Figure 1 and Figure 2. 6 In Figure 1, A is a material (printing material) supply device, B is a material feeding device, and C is a printing press main body. It is.

The printing press body C is composed of a lower frame 1 having an impression cylinder 2, a blanket cylinder 4, a plate cylinder 5t, and an upper frame 3. The upper frame 3 side has a fountain roller 6 for supplying ink to the plate cylinder 5, a kneading roller 7, and other rollers. A tth ink transfer roller 8 is provided for transferring a required amount of ink from the ink to the mixing row 27.

The present invention suppresses the range of pendulum movement of the ink transfer roller 8 to place it in a separated state where it does not come into contact with the fountain roller 6, thereby interrupting the ink transfer.The specific structure thereof will be explained with reference to FIG.

The ink transfer row 28 is integrally supported with a roller lever 10 that swings between the fountain roller 6 and the kneading roller 7 using a support shaft of 9 ft as a fulcrum. is biased in the direction of contact.

The machine gI that swings the roller lever In to make a pendulum movement of the ink transfer roller 8 is provided integrally with the plate cylinder 5, and includes a drive lever 13 that swings by a t-cam, and a drive lever 13 that swings the ink transfer roller 8.
A link pinot 16 is pivotally connected to a fan-shaped gear 12 that rotates reciprocatingly by a link 14 connected to a pivot pin 17, and a guide groove 18 and a roller lever 10 are provided at the tip of the link pin 16. It has a structure in which it is engaged with the pin 15 with some play. Incidentally, the fan-shaped gear 12 #-j rotates the fountain roller 6 at a required rotation angle.

11a, llbu is a stopper that connects the ink transfer roller 8, fountain roller 6, and kneading roller 7, and the roller lever 10 comes into contact with it.

Further, the mechanism for separating the ink transfer roller 8 from contact with the fountain roller 6 against the tension spring of the circuit and suppressing the pendulum movement range is provided with a protrusion 22t on the roller lever 10, and a protrusion 22t in the vicinity of the protrusion n. A contact surface 21t that contacts the protrusion n is provided, and a t link 19t is rotatably arranged by a support shaft 20.

This link 19 and the piston rod of the cylinder 23 are connected to form a nine-piece structure.

Since the present invention has the above-described structure, normally the piston rod of the cylinder 23 is moved backward as shown in Figure 2,
The contact 1fi21 of the link 19 and the protrusion n of the roller lever 10 are separated to be in the t state.

As a result, the reciprocating rotation of the sector gear 12 based on the rotation of the plate cylinder 5 causes the roller lever 10t to be pushed through the link bin 16 against the tension force of the tension spring of the circuit, and is always in contact with the fountain roller 6. The ink transfer roller 8 is moved toward the kneading roller 7 side, and then returned to the fountain roller 6 side using a tension spring. This operation is repeated.

To explain in more detail, in FIG.
First, it pivots to the right and rotates the fountain roller 6 by a required angle. As this fan-shaped gear n pivots to the right, the link bin 16 also moves to the right, but initially there is some play between the guide groove 18 and the bin 15 on the roller lever 10, so the roller lever 10 Without being actuated, the ink transfer roller 8 contacts the fountain roller 6 and remains in a constant state. As a result, the required amount of ink on the fountain roller 6 is supplied to the ink transfer roller by rotating the fountain roller 6 at a required angle. And the fan-shaped gear 12
When the link bin 16 turns rightward at a required angle, the guide groove 18 of the link bin 16 comes into contact with the bin 15, and the roller lever 11 is pushed to contact the ink transfer roller 8t-kneading roller rough.

Thereafter, the fan-shaped gear 12u is rotated back to the left, and the ink transfer roller 8 is brought into contact with the fountain roller 6 by a tension spring of approximately 9. Incidentally, when the fan-shaped gear 12 is turned back to the left, a one-way rotation device such as a ratchet mechanism prevents reverse rotation from being applied to the Fauchenten roller 6.

Next, if the ink transfer is to be interrupted, the cylinder 23 is actuated to move the piston rod forward.

As a result, the link 19 rotates to the left in FIG. The ink transfer roller 8 is positioned apart from the fountain roller 6. Therefore,
The fan-shaped gear 12 continues to reciprocate from side to side and moves the ink to the ink transfer roller 8t-kneading roller 7, but when it is returned to the fountain roller 6 side by the tension spring, the protrusion 22 comes into contact with the contact surface 21. The pendulum movement is suppressed within the range of pendulum movement in a state where it is separated from the fountain roller 6, and the interruption of ink transfer is maintained.

<Effects of the Invention> As described above, according to the present invention, the pendulum movement range of the pendulum-moving ink transfer roller is suppressed while being separated from the fountain roller. It is possible to interrupt the ink transfer from the kneading roller to the kneading roller, and the ink transfer can be interrupted and restarted very easily, which has the advantage of allowing efficient printing work.

4. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view of the present invention, and Figure 2 is an enlarged side view of the same essential parts.

5... Plate cylinder, 6... Fountain roller, 7...
Kneading roller, 8... Ink transfer roller, 10-... Roller lever, 12... Fan-shaped gear, 150- Bin, 16
・0 link bin, 18 --- guide groove, 19 --- link, 21 --- contact surface, 22@・O protrusion, ridge -- cylinder.

Claims (1)

[Claims] In a device for transferring ink from the fountain roller to the mixing roller by pendulum movement of the ink transfer roller between the fountain roller and the mixing roller, the ink transfer roller is provided with a required play in conjunction with the rotation of the plate cylinder. and a pendulum movement range suppression mechanism that restricts the ink transfer roller to a position separated from the fountain roller by a link that rotates due to the operation of a cylinder to perform a pendulum movement. Ink transfer interruption device for rotary printing presses.