JP2537504Y2 - Drive stopping device for inking device in printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inking and damping device (offset machine) provided in a printing unit of a multicolor printing press or a duplex printing machine, or a drive stopping device of an inking device (letter plate, flexo machine). Things.

[0002]

2. Description of the Related Art In a sheet-fed multicolor printing machine, for example, in a case where six colors are printed by a multicolor printing machine that performs six colors printing, there is no problem because all the printing units are driven simultaneously to perform printing. In some cases, some printing units are not used for five-color or four-color printing. In this case, the printing unit is not provided with a mechanism for stopping the inking and dampening device or the inking device (the inking device will be described below because the same can be said in any case), so the printing unit is not used. The inking device of the printing unit is also rotating.

FIGS. 3 to 5 show a driving device of a conventional inking device of a printing unit. The plate cylinder 1 is rotatably supported by a frame 14, and a plate cylinder gear 1b and an ink drive gear 1a are mounted on the shaft end of the plate cylinder 1. An intermediate gear 2a is meshed with the ink driving gear 1a, and a gear 5a fixed to the ink reciprocating roller 5 is engaged with the intermediate gear 2a.
(And the gear 5Wa fixed to the water reciprocating roller 5W) mesh directly or via the large-diameter intermediate gear 2b, and each ink reciprocating roller 5 rotates.

[0004] Next, the shaft 6 is rotatably supported by the frame 14, and has sprocket wheels 6s, 6
p are each attached. The rotation of the sprocket wheel 2s fixed to the shaft of the large-diameter intermediate gear 2b is transmitted to the sprocket wheel 6s by the chain 7. The eccentric shaft 8 is mounted eccentrically on a flange 24a at the shaft end of a shaft 24 rotatably supported by a bracket 10 fixed to a frame 14. The sprocket wheel 24s of the shaft 24 It is driven by a chain 7 from a wheel 6p. Therefore, by the rotation of the eccentric shaft 8, the rod 9 attached to the shaft end of the shaft 8 via the spherical bush 8 a reciprocates while swinging, and swings the lever 11 rotatably supported by the frame 14. Move. The roller 12 fixed to the tip of each lever 11 is engaged with a roller receiver 13 attached to the shaft end of the ink reciprocating roller 5, so that the ink reciprocating roller 5 reciprocates in the axial direction.

As described above, since the ink reciprocating roller 5 reciprocates in the rotation and axial directions, the rotation of the intermediate gear 2a, which is the drive source of both, is interrupted to stop the drive of the roller group of the inking device. Is performed. The inking device is
It is composed of 20 or more rollers, not shown, such as an ink source roller, a recall roller, an ink reciprocating roller, a kneading roller, a rider roller, and an ink application roller. The ink source roller is intermittently rotated with the intermediate gear 2a as a drive source, and the call roller can be stopped independently. Therefore, the driving of the inking device is stopped by the rotation of the ink reciprocating roller 5 and the driving of the reciprocating motion.

[0006]

[Problems to be solved by the invention]
There are the following problems. In the conventional multi-color printing press or duplex printing press, the inking device of the printing unit that is not used is also driven, so that the driving wastes power and shortens the life of each ink roller.

Further, in a state where the rollers are in contact with each other under the contact pressure, the ink is not wound around the rollers, and the ink is not consumed, friction between the ink rollers causes the surface of the rubber ink roller to be damaged due to friction. I do. To prevent this, it is necessary to take preventive measures such as applying lubricating oil between the ink rollers. When printing again after taking this measure, it is necessary to perform operations such as cleaning the ink roller and setting the roller (including adjusting the contact pressure), which not only consumes labor and time but also prints immediately. Can not start.

Conventionally, the on / off operation of the ink drive gear can be easily performed by a clutch. However, what is not performed is the phase of the reciprocating motion of the ink reciprocating roller and the phase of the rotation of the plate cylinder when the clutch is disconnected. On the other hand, these positions could not be accurately adjusted when the clutch was connected,
If these phases are different, the quality of the printed matter will deteriorate. In the present invention, in a printing press having a plurality of printing units, the inking device of an unused printing unit is disconnected by a clutch, and the driving of the inking device is adjusted so that the phases of the ink reciprocating roller and the plate cylinder are matched when the clutch is connected. It is intended to provide a device.

[0009]

When an unused printing unit occurs, the driving of the inking device of the printing unit is disengaged by a clutch, and when the printing unit is re-driven, the phase of the ink reciprocating roller at the time of stoppage and the plate cylinder are stopped. It is necessary to adjust the phase of the clutch to the same as when the clutch was disengaged, and then engage the clutch. For this reason, a drive system in which the ink reciprocating roller rotates through an intermediate gear from an ink drive gear that drives the inking device at the shaft end of the plate cylinder, and a shaft driven through gears, sprocket wheels, and the like by the intermediate gear. The intermediate gear is divided into a driving intermediate gear and a driven intermediate gear in order to simultaneously release the driving system in which the ink reciprocating roller reciprocates by the rotating eccentric shaft and a rod attached to the eccentric shaft.
A rotary encoder for providing a clutch for separating and connecting the drive between the intermediate gears, detecting a reciprocating phase of the ink reciprocating roller and a rotational phase of the plate cylinder when the clutch is released, and a control device for recognizing the detected phase And are installed.

[0010]

[Function] Since the intermediate drive gear meshes with the ink drive gear of the plate cylinder and the gear of the ink reciprocating roller always meshes with the intermediate driven gear, the clutch provided between the intermediate drive gear and the intermediate driven gear is engaged. By turning off, the power from the ink drive gear is transmitted or cut off to the ink reciprocating roller.

The phase of the reciprocating motion of the ink reciprocating roller and the phase of the plate cylinder (both in the rotation direction) when the clutch is disengaged are detected by a rotary encoder, and the detected phases are stored in a control device and stored. When the clutch is engaged, the plate cylinder is first rotated to the phase stored in the control device, and then the clutch is engaged.

[0012]

1 and 2 show an embodiment of a drive stopping device for an inking device according to the present invention. The drive stop device 20 having a structure in which the conventional intermediate gear 2a is divided into two parts shown in FIG. 4 includes an intermediate drive gear 21a and an intermediate driven gear 21a.
b and the electromagnetic clutch 17. The intermediate drive gear 21a is rotatably supported by a frame 14 and a bracket 15 via a bearing 16 on an intermediate shaft 21.
, And meshes with the ink drive gear 1 a of the plate cylinder 1. The suction portion 17a of the electromagnetic clutch 17 is
, And is fixed to the intermediate shaft 21, and rotates together with the intermediate shaft 21. Next, the intermediate driven gear 21b is rotatably supported by the intermediate shaft 21, and one end of the intermediate driven gear 21b is provided with a suction portion 17b of the electromagnetic clutch 17. When the suction portion 17a and the suction portion 17b of the electromagnetic clutch are coupled by excitation, the plate cylinder 1
Is transmitted to the ink reciprocating roller 5, and when the ink is demagnetized, it is separated, the rotation is not transmitted, and the rotation and reciprocation of the ink reciprocating roller 5 are stopped.

Next, a rotary encoder 22 for detecting the phase of the reciprocating movement of the ink reciprocating roller 5 (dashed line in FIG. 5) is provided on the shaft 6, and a rotary encoder 23 for detecting the phase of the plate cylinder 1 (dashed line in FIG. 4). At the shaft end of the plate cylinder 1,
Electric signals indicating the phases from the rotary encoders 22 and 23 are input to a control device (not shown). The control device controls the electromagnetic clutch 17 to be engaged with the input phase.

In the inking stop state, since the phase of the reciprocating motion of the ink reciprocating roller 5 does not change, the rotary encoder 22 may be omitted and only the phase of the plate cylinder 1 may be controlled.

[0015]

According to the present invention, a clutch is provided in a drive system from the plate cylinder to the inking roller, for example, an intermediate gear, and when the inking device is stopped by the clutch, the reciprocating phase of the ink reciprocating roller and the plate cylinder's reciprocation. A rotary encoder that detects the rotational phase is provided, and the clutch is coupled with the phase of the ink reciprocating roller and the plate cylinder when the inking device is stopped by the clutch. In the case where an unused printing unit occurs due to the number of printing colors, the driving of the inking device of the printing unit can be stopped, so that the abrasion of the ink roller can be prevented. In addition, there is no need to apply lubricating oil to prevent this abrasion and cleaning at the time of re-use, and power can be wasted and power can be wasted, and re-drive can be automatically performed at the disconnection timing (phase) of the inking device. The effects of improving the durability of the ink roller, saving energy, improving the operation rate, and facilitating the operation can be obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part in an embodiment of the present invention.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a side view of a conventional rotary driving device for an ink reciprocating roller.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a plan view of FIG. 3;

[Explanation of symbols]

 17 Clutch 21a Intermediate drive gear 21b Intermediate driven gear 22 Rotary encoder 23 Rotary encoder

Claims (1)

(57) [Scope of request for utility model registration] In a printing press provided with a plurality of printing units having a plurality of inking rollers driven via a plate cylinder, a clutch is arranged in a drive system from the plate cylinder to the inking roller, and the inking roller is provided. A rotary encoder for detecting the reciprocating phase of the ink reciprocating roller in the inside and a rotary encoder for detecting the rotational phase of the plate cylinder are installed, and the reciprocating phase of the ink reciprocating roller and the rotational phase of the plate cylinder when the clutch is connected. A driving stop device for the inking device in the printing press, wherein the driving stop device is configured to match a phase at the time of disengaging the clutch.