JPH0623960A - Sheet-fed press - Google Patents

Abstract

PURPOSE:To simply perform a final fine adjustment of amount of ink to be supplied in individual presses while comparing a printed sheet with a trially printed sheet and enhance printing quality and work efficiency by providing an ink supply amount regulating means at a sheet delivery part in each of sheet-fed type presses which are controlled by group management. CONSTITUTION:A sheet-fed type press comprises a sheet feeding part 2 for feeding sheets 1 in a stream-like manner, printing units 4 for printing the sheets 1 with ink supplied from ink devices 3 and for pressurizing the printed sheets, and a sheet delivery part 7 for piling the printed sheets 5 on a couching tray 6. A plurality of such sheet-fed type presses are installed in a printing factory, and general control of the presses is exercised unitarily by a group management system. However, since an amount of ink to be supplied is not sufficiently controlled by means of rough adjustment only with the aid of a computer for group management, a means 9 for regulating an ink supply amount for each ink zone is set on a casing 11 in which a printed sheet delivering means 10 such as a chain gripper for the sheet delivery part 7 is stored. In this way, a trially printed sheet is taken out at the sheet delivery part is spread on the easing 11 and, while minutely observing a printed condition, fine adjustment can be finally made for each of many ink zones.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the control of sheet-fed printing presses under group control.

[0002]

BACKGROUND OF THE INVENTION In sheet-fed printing presses, paper registration,
Good printing can be performed only after the printing pressure, the adjustment of the equipment corresponding to the paper size, and a number of control items such as the dampening water and the ink supply amount are properly controlled. In the past,
JP-B-60-38741 and JP-A-63-230.
As shown in Japanese Laid-Open Patent Publication No. 342, an operation stand is attached to each individual printing press to individually control the above management items. However, in recent years,
In response to the development of computer control technology and the demand for reducing the operator's burden, a so-called group management system has been adopted in which a large number of printing machines are centrally controlled by a single computer.

Such group management of printing presses greatly contributes to the above-mentioned reduction of the burden on the operator and also has a great effect on the reduction of the factory space because the operation stand is not required.

Among the management items of the above-mentioned sheet-fed printing press, the adjustment of the ink supply amount has the greatest print quality and directly affects the print quality.
Since the ink supply amount is set by dividing it into a large number of ink zones, there is a demand for final fine adjustment while comparing it with the trial printing printed by each printing machine.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an advanced sheet-fed printing machine, the purpose of which is to supply ink to a group-fed sheet-fed printing machine. The final fine adjustment of the amount is to be easily performed in each printing machine.

[0006]

To this end, the sheet-fed printing press according to the present invention is characterized in that the ink supply amount adjusting means (9) is provided in the paper discharge section (7).

[0007]

As a result, the final fine adjustment of the ink supply amount for each ink zone can be easily performed in each printing machine while comparing with the trial printing (8) taken out in the paper discharge section (7). .

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a schematic side view showing an embodiment of a sheet-fed printing press according to the present invention, FIG. 2 is a plan view thereof, and FIG.
FIG. 4 is a plan view showing an ink supply amount adjusting means.

The sheet-fed printing machine shown in FIG. 1 is roughly classified into a sheet feeding section (2) for feeding the sheet (1) in a stream and an ink sent from an inking device (3) to the sheet (1). It is composed of a printing unit (4) for pressurizing and printing, and a paper discharge unit (7) for piling printed paper (5) on a paper stack (6).

The present invention is premised on the fact that a large number of such sheet-fed printing presses are arranged in a printing plant and are centrally controlled by a group management system. In other words, a large number of sheet-fed printing presses are not individually controlled by the operation stand as in the conventional case, but a large number of management items described above are centrally controlled by a single computer.

However, regarding the adjustment of the ink supply amount among a large number of management items, it is not enough to make a general adjustment by a computer for group management, as it is, and the final adjustment is made for each of a large number of divided ink zones. It is necessary to perform fine adjustment in correspondence with the trial printing (8).

Therefore, the sheet-fed printing machine according to the present invention is provided with the ink supply amount adjusting means (9) for each ink zone in the paper discharge section (7). Since the paper discharge unit (7) originally has a casing (11) for accommodating a paper transporting unit (10) such as a chain gripper, it is convenient to place the ink supply amount adjusting unit (9) there. is there. Further, it is natural that the trial printing (8) is taken out from the paper discharge section (7), so that the trial printing (8) is installed in the casing (1).
1) The print can be observed in detail by spreading it upward.

The structure itself of the ink supply amount adjusting means (9) is the same as that of the above-mentioned prior art, and the ink blade (12) of the inking device (3) is used to divide the ink into a large number of divided ink zones. Since the supply amount is adjusted, the push button (13),
At (14), the ink supply amount is increased and the supply amount is displayed (15). The ink supply amount adjusting means (9), a computer (not shown) for group management, and an inking device (3) having a blade driving means such as a stepping motor are not electrically connected. Needless to say.

[0014]

According to the sheet-fed printing machine of the present invention, the ink for each ink zone can be easily and individually used in each printing machine while comparing with the trial printing (8) taken out in the paper discharge section (7). Since the final fine adjustment of the supply amount can be performed, the print quality can be further improved and the working efficiency can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a sheet-fed printing press according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view showing an ink supply amount adjusting means.

[Explanation of symbols]

 3 Ink device 4 Printing unit 7 Paper discharge part 8 Trial printing 9 Ink supply amount adjusting means 11 Casing 12 Ink blade 13 Push button 14 Push button 15 Display

Claims (1)

[Claims] 1. A sheet-fed printing machine under group control, characterized in that an ink supply amount adjusting means (9) is provided in a paper discharge section (7).