JPS60228158A - inkjet printer - Google Patents

Abstract

PURPOSE:To control recorded prints of different colors by a mechanism as simple as a monochromatic ink jet printer by setting nozzles of different colors at a discharge position through their sequential rotation. CONSTITUTION:Nozzles of different colors 1 are loaded at connectors 2 of a head 4, the head 4 is mounted on a rotary shaft 3 and then is fixed with a nut. When color printing is performed at the head, a selected signal color is used for printing a single line on a recorder print of the first color. Next, the head is turned to print and record a single line of the second color and then different colors are sequentially selected to perform printing and recording. Thus Y, M, C, B are color-printed after four nozzle rotations.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to an inkjet printer.

[Prior art]

The non-in/'9ct recording method has the advantage that the noise generated during recording is extremely small to the extent that it can be ignored.
It has recently attracted particular attention. Among these, the inkjet recording method (liquid jet recording method), which is capable of high-speed recording and full-color recording on plain paper, is an extremely powerful recording method, and various methods have been proposed so far. There is.

In such a liquid jet recording method, recording is performed by flying droplets of a recording liquid called ink and adhering them to a recording material, and the formation of droplets of the recording liquid is By the method and the method of controlling the formed droplets,
It is roughly divided into several methods.

Among them, for example, U8F3683212 specification, 3
The liquid jet recording method disclosed in 74712.0, 3946398, etc. is a method in which droplets are ejected from an ejection orifice in response to a recording signal, and the droplets are attached to the surface of a recording material. This is a new type of drop-on-demand recording method that performs recording by letting the droplets drop.In this recording method, only the droplets necessary for recording are ejected, so there is no need to collect or dispose of ejected liquid that is not needed for recording. There is no need to install special means for this, the device itself can be simplified and miniaturized, there is no need to control the flight direction of the droplets discharged from the discharge orifice, and furthermore, multicolor recording is possible. Recently, it has been attracting particular attention because it is easy to perform.

This liquid jet recording device usually has an ejection opening (orifice) for ejecting droplets, a liquid flow path that communicates with each orifice and has an energy generating element that forms flying droplets, and a liquid flow path for each liquid flow path. In general, an inkjet head configured with a liquid chamber that communicates with the inkjet head and stores liquid to be supplied to these channels is fixed on a carriage that can relatively scan a recording material.

In this conventional inkjet recording device, when looking at the color inkjet head, YMC-
Four color nozzles of B (yellow, magenta, cyan, black) are connected to one inkjet.

In addition, multiple orifices can be assembled into a card and connected to the ink supply system independently, or multiple orifices can be installed in accordance with each color, for example, Y-M-C-B, etc. Stack them together to form one inkjet.

Attempts have been made to make the inkjet head more colored and faster by mounting it on a carriage as an inkjet head. The disadvantages are that failures such as nozzle defects are likely to occur, and adjustment work for replacement and maintenance is difficult.

Furthermore, the printing control system of the inkjet head that controls a plurality of orifices becomes complicated, resulting in an inconvenience that the entire apparatus becomes expensive.

〔the purpose〕

The object of the present invention is to solve the above-mentioned drawbacks, and to provide a high-quality, high-precision inkjet that can perform highly stable color print recording with a simple structure, and has a simple print-recording control mechanism and control system circuit. By providing printers.

〔overview〕

An object of the present invention is to arrange a plurality of inkjet heads in a radially detachable manner on a carriage, and to provide a rotation mechanism for causing at least one of the inkjet heads to face a recording member side. This is accomplished using an inkjet printer.

〔Example〕

An embodiment of the inkjet printer of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 are schematic structural explanatory diagrams of an inkjet printer of the present invention. 1 is a nozzle section, 2 is a connector, 3 is a rotating shaft, and 4 is a head section, which houses a connection section for transmitting electrical signals to the nozzle section 1. Reference numeral 5 denotes a recording paper on which printing is to be performed, and 6 indicates a recording paper to be printed on. Y-M-C- to connector 2
The nozzle parts 1 corresponding to each color of B are attached.The nozzle parts 1 of each color are arranged and loaded in the connector 2 of the head part 4, and the head part 4 is inserted and attached to the rotating shaft 3. Attach and secure with nuts 6.

At this time, wiring from driver circuits and the like that command electrical signals to the nozzle parts 1 of each color are connected by flexible cords or flat cables.

When performing color print recording with this head section 4, the first
Print one line of color printing in the selected color, then move to the next step, rotate the do part 4, print and record one line of the second color, and then sequentially select and record each color. 4 rotations Y-M-
The color is C-H.

Figure 1 shows an example of an inkjet printer in which the nozzle part 1 is arranged horizontally, and Figure 2 shows an example in which the nozzle part 1 is arranged vertically, and has the same structure and function as the embodiment shown in Fig. 1. has. FIG. 3 shows the ejection direction of the nozzle part 1 from the head part 4.
This is an example in which the nozzles are arranged in three directions along the rotation axis, and has the same structure, function, and operation as the embodiment shown in FIG. This is an example of the arrangement of the head unit 4 that enables color print recording.

FIG. 4 shows a side-shooter type inkjet printer, in which the nozzle 7 has an orifice plate 10 arranged on the surface of a heater part 8. A head portion 9 is fixed around the rotating shaft 3 with a nut 6. To select each color, the head section 9 is rotated around the rotating shaft 3, and printing and recording of force 2- can be performed. Figure 5 shows an example of a multi-directional inkjet printer in which side-shooter type nozzle sections 1 are arranged for four or more colors, making it possible to print with gradations and improve color tone quality. It is.

FIG. 6 is a schematic diagram of an inkjet printer with hidden side shooters.

A head section 9 having nozzle sections 1 in four directions is installed on a carriage 11 via a rotating shaft 3, and is attached to a rotating section 15 with a nut 6. The carriage 11 runs on a guide rail 12. 13 is a spring member, 14 is a strike member,
/f- is the starting point and ending point of the carriage 11.

The rotating part 15 can have many configurations. For example, the rotating shaft 3 is rotatably provided on the carriage 11, and the head portion 9
Attach and secure with nut 6.

If the rotating shaft 3 is configured to transmit the rotational force of the motor via a gear or belt, etc., and the motor is rotated according to the printing instruction so that the necessary nozzle part 1 faces the recording member 5 side. good. Also, at this time, it is desirable to provide a stop 14-14 using a spring member 13 or the like so that the rotating shaft 3 does not rotate unnecessarily due to the scanning of the carriage 11.

In order to make the device simple and inexpensive, the carriage 11 is
A rotational force may be generated by bringing a member into contact with a protrusion or the like that is interlocked with the rotating shaft 3 during scanning.

In addition, in this case, the change of the do part 9 to the carriage 11
In other words, it may be performed by converting the reaction force when the head portion 9 comes into contact with the stopper 14 into a rotational force.

By providing a curvature at the end of the adjacent guide rail 12, the head portion 9 can be rotated by 90 degrees.

Further, in the middle of the carriage turn, the head section 9 does not rotate, and the head section 9 is installed in the same direction and reciprocates on the guide rail 12 to print and record on the recording paper 5 with ink of the same color.

Which nozzle section 1 of the head section 9 is connected to the recording member surface 5?
It is important for the apparatus to provide an electrical contact or the like to detect whether the recording material is facing the recording material surface 5, or to provide a contact so that the signal is input only to the head 9 facing the recording material surface 5. This is highly desirable in terms of staining, recording with desired ink, etc. Of course, the rotation of the rear part 9 may be performed manually.

〔effect〕

According to the present invention, since the nozzle portions of each color rotate in sequence and are set at the ejection position, the control of printing and recording of each color becomes as simple as a single-color inkjet printer, resulting in extremely high precision. Y-C with good gradation and image quality
- It is easy to obtain a color print record consisting of M-B colors, and it is also easy to replace the inkjet head in case of failure due to head defects such as missing nozzles or ink jams, and high-quality printing is possible. - An inkjet printer capable of stably producing print records or color print records can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic structural explanatory diagram of an embodiment of an inkjet printer according to the present invention, and FIGS. 2 and 3 are schematic structural explanatory diagrams of other embodiments of the present invention. FIG. 4 is a schematic diagram illustrating the configuration of a side shooter type inkjet printer of the present invention, and FIG. 5 is a schematic diagram illustrating the configuration of a side shooter type multifaceted inkjet printer. FIG. 6 (sl) is a top view showing a schematic configuration of a side shooter type inkjet printer. FIG. 6(b) is a side view of FIG. 6(,). DESCRIPTION OF SYMBOLS 1... Nozzle part, 2... Connector, 3... Rotating shaft, 4... Head part, 5... Recording paper, 6... Nut, 7... Nozzle, 8... Heater part, 9... Head part, 10... Orifice plate, 11... Carriage, 12... Guide rail, 15... Rotating part.

Claims (1)

[Claims] An inkjet printer comprising a plurality of inkjet heads disposed radially and removably on a carrier and a rotation mechanism for causing at least one of the inkjet heads to face a recording member.