JPH0611768Y2 - Automatic ink supply device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a proof press that automatically supplies ink to an inking roller that is instructed where and how much ink needs to be replenished. The present invention relates to an automatic ink supply device that supplies ink.

(Prior Art) The main purpose of proof printing of more than 10 sheets performed by a proof printing machine is for a printer to confirm printing with an orderer. The orderer is
The printed matter is evaluated by the letters and color tones of this proof. Therefore, if the finish of this printed matter is not satisfactory, an order is placed and the printer again performs proof printing to match the order. When the orderer is satisfied with the finish of the proof print through such a process, the printer prints a large amount of this machine to match the proof print.

Here, there are various methods for the printer to satisfy the orderer regarding the color tone. One is a method in which the tone of a positive film for producing a proof printing plate is remade and the proof printing is performed again. Secondly, the positive film is left as it is, and the amount of ink to be put on the proof plate is adjusted to answer the order of the orderer. In the second method of printing on this machine, since pages 8 and 16 are impositioned, it is impossible to adjust the ink for only one page of the tone of the positive film printed at the same time. . Therefore,
In order to get the printed matter that the orderer is satisfied with,
Inevitably, the former positive film had to be recreated and proof printing had to be repeated, resulting in a heavy burden of labor and costs.

However, the current relationship between plate making and printing does not go this way. One of the reasons is that, as mentioned above, the color tone can be changed in the proof printing regardless of the state of the positive film in plate making. If this method is used, it is difficult to produce the same proof print in the subsequent mass printing of this machine. A large amount of mistakes (breaks) and ingenuity in the printing plate make it a big loss over time.

So far, I have explained why it is important to print proofs in a certain state.

Next, in order to know the density of the print management scale, an automatic densitometer has been invented, such as JP-A-60-151051 "Flatbed proof press". Here, the operator can recognize in what state the proof print is printed. However, the problem is how to feed back the information obtained from the print management scale to printing. In the proofreading press, the ink is inscribed by the operator with a spatula at a certain amount in the axial direction of the inking roller after printing several sheets, so the measurement result cannot be reflected sufficiently. In addition, since the flatbed proof printing machine produces a wide variety of products in small lots, plate and paper replacement is easy.
It is necessary that the ink held on the inking roller be consumed quickly, etc., and that a stand equipped with a blanket roller, an inking roller, and a dampening water supply roller runs on the surface plate on which the plate and paper are placed. I am proofreading and printing. By the way, since ink is a viscoelastic substance,
If you do not knead to a certain degree, viscosity does not occur, and an ink kneading mechanism consisting of multiple rollers is required for the printing machine,
This mechanism can be installed in constant contact with the inking roller when the size is limited, such as in the printing press for this printing. In some cases, since it is difficult to mount, the flatbed proof press is separated, and an inking roller is placed on the gantry and an ink kneading roller group is placed beside the surface plate. Therefore, in the flatbed proof press, when ink is newly supplied, the stand is stopped on the ink kneading roller group on the side of the surface plate, and the inking roller is lowered to bring it into contact with the ink kneading roller group, Need to knead. Also, after changing the plate, to print the next plate quickly,
It is necessary to quickly consume the ink held on the inking roller and the ink kneading roller group corresponding to the pattern of the previous plate, and to make it correspond to the pattern of the next plate. It is necessary to minimize the number of rollers, and the viscosity of the ink is often low due to insufficient kneading, and the density of the proof print immediately after ink supply may be extremely low.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems, and in order to stabilize the density of proof printing and reduce the burden on the operator, an automatic densitometer It is an object of the present invention to provide an automatic ink supply device that automatically supplies ink by connecting to a mechanism that indicates the location and amount of ink that needs to be replenished.

(Means for Solving the Problem) The present invention provides a surface plate on which a plate and a sheet are placed, a stand for traveling on the surface plate to print a pattern and a print management scale on the sheet, and a stand mounted on the stand. In a flatbed proof press having an inking roller that supplies ink to the plate, in an automatic ink supply device that supplies ink to the inking roller, print density measurement for measuring the print density of the print management scale Means, a sheet number counter for counting the number of printed sheets, and a portion and an amount of ink on the inking roller that needs to be replenished, based on signals from the print density measuring means and the sheet number counter, to print several sheets. An arithmetic unit for giving instructions for each time, an ink fountain capable of enclosing ink, a mechanism for applying a pressure to the inside of the ink fountain, and a part of the ink fountain being opened by an instruction of the arithmetic unit. A mechanism for causing ink to be deposited on the inking roller by the pressure inside the ink tank and a mechanism for automatically moving the mechanism for depositing ink in the axial direction of the inking roller according to an instruction from the arithmetic unit. It is a featured automatic ink supply device.

(Example) Next, it demonstrates, referring drawings.

FIG. 1 is an external view of the present invention. A spiral bar (2) is provided above the inking roller (1) of the flatbed proof press. The spiral bar (2) is connected to the step motor (3) and rotates according to the rotation of the step motor (3). The movable part (4) having a through hole cut in the same waveform as the spiral bar (2) is moved left and right by the rotation of the spiral bar (2). The pressing plate (5) blocks the force of the movable part (4) about to rotate. Ink is sent from the ink stock fountain (6) to the pen ink fountain (8) of the movable part (4) via the ink tube (7). For the ink in the ink stock fountain (6), compressed air is supplied to the air tube (1
Therefore, the ink in the pen ink fountain (8) is always subjected to a force such that the ink leaks to the outside. FIG. 2 is an explanatory diagram around the movable part (4). Vertical bar (1) of solenoid coil (9)
2) is pulled up by the upper spring (10).
The vertical movement bar (12) is connected to the pen ink fountain (8). The ink is sent by the ink tube (7), but the ball (11) prevents the ink from escaping.
The pen ink fountain (8) and the up-and-down moving bar (12) usually come with a spring (1
It is pulled up by (0), but when the solenoid coil (9) operates, it moves up and down against the spring (10) and the vertical movement bar (12).
And the pen ink fountain (8) also descends. When the solenoid coil (9) is stopped, the spring
The vertical movement bar (12) rises due to (10), and the pen ink fountain (8) also rises accordingly.

FIG. 3 is an explanatory diagram of ink deposition on the inking roller (1). In (A), when the pen ink fountain (8) is rising, the ink in the pen ink fountain (8) is
It cannot be missed by the ball (11). In (B), the ink in the pen ink fountain (8) is leaked between the ball (11) and the pen ink fountain (8) when the pen ink fountain (8) is descending. FIG. 4 is a block diagram of the flow of signals. By calculating the driving amounts of the step motor (3) and the solenoid coil (9) in the arithmetic unit (14) from the signal obtained from the automatic density measuring device (13) and the signal of the printed number counter (15) Indicate where and how much ink needs to be replenished. Stabilization of proof printing can be obtained by changing the automatic ink supply device for the fractional ink supply with a spatula.

(Effects of the present invention) By using the automatic ink supply device of the present invention, what is conventionally supplied by a worker with a spatula at every printing of the number of sheets is directly used by the information of the automatic density measuring device. Ink rollers can be replenished to the required places in the required amount, improving the quality of printed materials, reducing the burden on workers, and increasing the production speed. A printing machine that has an ink kneading roller beside the surface plate and stops the stand on the ink kneading roller every time the ink is replenished to the inking roller and lowers the inking roller to knead the ink. , The ink is replenished on the inking roller after printing several sheets to reduce the number of stoppages, maintain the production speed, and also make the ink supply directly unstable. Since it is not based on the density measurement of the subsequent first sheet, the quality of the printed matter can be improved.

[Brief description of drawings]

FIG. 1 is an external view. FIG. 2 is an explanatory diagram around the movable part. FIG. 3 is an explanatory diagram of ink inking on the inking roller. FIG. 4 is a block diagram of the flow of signals. (1) …… Inking roller (2) …… Spiral bar (3) …… Step motor (4) …… Movable part (5) …… Pressing plate (6) …… Ink stock fountain (7) …… Ink Tube (8) ... Pen ink fountain (9) ... Solenoid coil (10) ... Spring (11) ... Ball (12) ... Air tube (13) ... Automatic concentration meter (14) ... Computing device (15) …… Printed sheet counter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-2759 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A platen on which a plate and a sheet are placed, a stand for running on the platen to print a pattern and a print management scale on the sheet, and an ink mounted on the stand for supplying ink to the plate. In a flatbed proof press having an inking roller, in an automatic ink supply device for supplying ink to the inking roller, a print density measuring means for measuring the print density of the print management scale, and the number of printed sheets are counted. A sheet number counter, an arithmetic unit for calculating the location and amount of ink on the inking roller that needs to be replenished based on signals from the print density measuring means and the sheet number counter, and giving an instruction every time several sheets are printed. An ink fountain capable of enclosing ink, a mechanism for applying pressure to the inside of the ink fountain, and a part of the ink fountain being opened according to an instruction from the arithmetic unit,
A mechanism for causing ink to be deposited on the inking roller by the pressure inside the ink fountain and a mechanism for automatically moving the mechanism for depositing ink in the axial direction of the inking roller according to an instruction from the arithmetic unit. Characteristic automatic ink supply device.