JPS62116436A - Continuous document feeding device of printer - Google Patents

Abstract

PURPOSE:To make effective the replacing operation for continuous document forms of different types by furnishing a printer with continuous document supply mechanisms multiplexly. CONSTITUTION:A plurality of continuous document supply mechanisms (tractors) 2A, 2B, 2C are arranged one over another, and sheet sensing means 5A, 5B, 5C for detection of passage of individual sheets are installed on the downstream in sheet feeding direction. When printing on documents of one type is finished and another type slips are to be printed, the current sheets are returned to the appropriate one of the sheet sensing means 5A-5C, and after retraction of the sheets is verified, changeover of the next switching mechanism should again be made, and now printing sheets loaded in other tractor mechanisms 2A-2C are fed to the printing area. This can minimize complicatted operations otherwise required for replacement of the sheets.

Description

[Detailed description of the invention] Technical field The present invention relates to a continuous form feeder device for a printer.

BACKGROUND ART FIG. 4 shows an example of a conventional continuous form feeding device for a printer. Continuous printing paper 1 is latched to a pin 2a of a continuous form supply mechanism (hereinafter referred to as a tractor mechanism) 2 and fed out by an endless drive, and is discharged after printing to the outside of the printer by IIm with a platen 3. Printing is performed by the print head 4 in cooperation with the print head 3. Conventionally, this type of printer has a structure in which only one type of continuous form can be installed inside the device.

That is, in such a conventional mechanism, one type of printing paper 1 is mounted on the device and continuous forms are produced, and several types of printing paper 1 cannot be mounted at the same time. Therefore, the user has to spend a lot of time and effort to mount the paper for each type of printing paper 1, which causes various problems.

OBJECTS OF THE INVENTION Therefore, the present invention has been made to solve the problems of the conventional example described above, and an object of the present invention is to provide a continuous form feeding device for a printer that can simultaneously handle several types of printing paper.

In order to solve the above-mentioned problems and achieve the purpose, the printer of the present invention has a continuous form feeding device (i.e., a plurality of continuous form feeding mechanisms that feed separate continuous form sheets toward the printing surface). ,
selection means for selecting one of the continuous form supply mechanisms; 1;
The present invention is characterized by comprising a power switching mechanism that transmits power to the selected continuous form supply mechanism in response to a selection command from the selection means.

Embodiment Hereinafter, an embodiment of a continuous form feeding apparatus for a printer according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall schematic diagram of an embodiment according to the invention. For example, the three tractor mechanisms 2A, 2B, and 2C are arranged in three layers, one above the other, and the respective paper sheets 1A, IB,'
On the downstream side of the IC in the feeding direction, there is paper detection means 5A for detecting passage of each of these papers.

5B and 5G are arranged as shown in the figure. Each tractor mechanism 2A, 2B, 2C has paper guides 6A of different lengths.
, 6B, 6C, printing paper 1A, IB,
This is designed to prevent ICs from interfering with each other's transmission.

In the embodiment, elliptical tractor mechanisms 2A, 2B, and 2C are shown, but these may be circular tractor mechanisms.

FIG. 2 shows the power switching mechanism. The three tractor mechanisms 2A, 2B, and 2C are switched by a clutch-type switching mechanism 10 and driven by the power of a paper feeding drive motor 20.

That is, the switching operation for the switching mechanism 10 is performed each time by a selection operation using the tractor changeover switch (switching means) 30, and an electric signal for the switching operation by the operation of the tractor changeover switch 30 is inputted. In response to this switching operation signal, the switching mechanism 10 converts it into a reciprocating motion of the operating rod 11 and outputs it, and the reciprocating motion of the operating rod 11 causes the intermediate gear 12 fixed to the tip to mesh with it and rotate. Its meshing position is shifted with respect to the driving gear 21 directly connected to the output shaft of the motor 20 that transmits the signal.

FIG. 2 shows a state in which a passive gear 40A on the tractor mechanism 2A side is meshed with the intermediate gear 12, and rotation from the motor 20 is transmitted to the tractor mechanism 28. In the figure, 40B and 40G are passive gears provided corresponding to the tractor mechanisms 2B and 2C, respectively, and each tractor mechanism 2A.

Transmission belts 50A and 50B correspond to 2B and 2G.

50C, transmission pulleys 60A, 60B, 60C, and transmission shafts 70A, 70B, 700 are provided.

Next, the operation of the above embodiment will be explained.

As shown in FIG. 1, there are three tractor mechanisms 2A and 2B.

2C has three types of printing paper standards, IA and IB.

They will be implemented at the same time so that continuous forms can be created for 1C. The passive gear 40A selects and operates one of the changeover switches 30 corresponding to any one of the desired tractor mechanisms 2A, 2B, and 2C to operate the changeover mechanism 10 and target the intermediate gear 12.

Make it mesh with one of 40B and 40G. One of the tractor mechanisms 2A, 2B, and 2C is actuated by the power of the drive motor 20, and the desired printing paper is delivered onto the printing surface. One printing operation is completed.

When working on another form, the paper detecting means 5A corresponds to the print paper currently being fed by one of the changeover switches 30 selected last time.

5B, 5C, and after confirming that the printing paper has retreated, the next switching mechanism 10 is switched again, and the printing paper mounted on another tractor mechanism 2A, 2B, 2C is printed. sent to the surface.

Incidentally, FIG. 3 shows another embodiment of the continuous form feeding apparatus for a printer according to the present invention. According to this, printing paper 1A, I
In order to smoothly draw out the parts B and 1C, a pin feed tractor 8 in the form of a tooth width is separately provided, and the tooth pitch of this Binfield tractor 8 is the same as that of the tractor mechanism 2A,
The pitch is the same as the pitch of each bin 2a of 2B and 2C, and synchronization is achieved. The other members are the same as those in the first embodiment, so their explanation will be omitted.

As described in detail of the invention, by arranging the tractor tElt+1IS (continuous form supply mechanism) on the printer in five widths,
This has the advantage that several different types of continuous form paper can be used without removing it from the device, and the complicated paper replacement work can be minimized. It should be noted that if a configuration in which a desired number of tractor mechanisms is provided is adopted, it is possible to use a large number of sheets without replacing the sheets.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a continuous form feeding device for a printer according to the present invention, FIG. 2 is a configuration diagram showing a power switching mechanism of the device according to the embodiment, and FIG. 3 is another embodiment of the present invention. Configuration diagram,
FIG. 4 is a schematic diagram of the configuration of a conventional printer's continuous form supply device. Explanation of symbols of main parts 1A, IB, 1G... Printing paper 2A, 2B, 2
C...Tractor mechanism 3...Platen 4...Print heads 5A, 5B, 5C...Paper detection means 30A, 3
0B, 30G

Claims (1)

[Claims] a plurality of continuous form supply mechanisms that feed separate continuous form sheets toward the printing surface; a selection means that selects one of the continuous form supply mechanisms; and a continuous form that is selected in response to a selection command from the selection means. A continuous form feeding device for a printer, comprising a power switching mechanism that transmits power to a form feeding mechanism.