JPS61171373A - Recorder - Google Patents

Abstract

PURPOSE:To enable perfect recording to be easily conducted on a slip form paper by automatically reversing the paper and contrive conservation of labor and paper, by providing a paper feeding passage with a sorting part for determining whether a recorded paper is to be fed to a paper-receiving part or to a paper-resupplying part. CONSTITUTION:With a paper-feeding roller 18 rotated, a paper 14 contained in a hopper 12 is guided to a platen 20 by passing on a deflector 42. With a printing position controlled, the paper 14 fed on a paper detector 32 is fed to a printing position of a printing head 30, and is fed while being appropriately printed. When printing also on the back side of the paper, the paper 14 is moved up into a resupplying hopper 40 by passing between the platen 20 and a bail roller 50, and when the trailing end of the paper comes off the platen 20, the paper once introduced into the hopper 40 is inserted to the lower side of the platen 20 in the state of being reversed face side back and with the trailing end thereof as a new leading end, then printing is conducted on the back side of the paper, and the paper is fed to a stacker 34 to be recovered.

Description

[Detailed Description of the Invention] ■ The present invention relates to printing devices such as printers and plotters that record on cut sheets, and recording devices such as copying machines and facsimiles, and particularly to recording devices that record on both sides of cut sheets. The present invention relates to a recording device suitable for.

With this type of recording device, we would like to be able to record on the back side of the cut sheet once it has been recorded.

Conventionally, since there is no mechanism for automatically reversing the paper, it has not been possible to automatically and continuously record on both sides of the paper. Therefore, traditionally.

If it is desired to record on both sides of a sheet of paper, the operator must manually turn over a large number of sheets of paper one by one and re-feed the paper, which is extremely inefficient and time consuming.

1-1. Therefore, an object of the present invention is to automatically invert the cut sheet in the above-mentioned recording device to easily record on both sides of the sheet, thereby saving labor and increasing the number of sheets. The purpose is to realize power saving.

In order to achieve this object, the present invention provides a paper supply section that supplies cut sheets, and a recording section that records on the paper supplied from the paper supply section.

The paper tray that collects the recorded paper is a section, the paper re-supply section inverts the recorded paper that is not sent to the section and re-supplies it to the recording section, the paper re-supply section and the paper tray. and a section for determining whether the recorded paper is sent to the paper receiving section or to the paper refeeding section by rotating between the section and the section to selectively form a paper feeding path as appropriate. It is characterized by being

Then, once the cut sheet is fed to the recording section and once recorded, the section is sent to the paper re-feeding section via the section, and then the sheet can be reversed and recorded on the back side. Become.

The present invention will be described in detail below based on an embodiment of the present invention shown in one drawing.

FIG. 1 is a perspective view of a serial dot matrix printer which is an embodiment of the recording device of the present invention. In FIG. A hopper (12) is provided as a paper supply section of this printer. Cut sheets (14) are stacked and stored in this hopper. Hopper (1
2) is attached with a slidable positioning plate (16) according to the size of the paper to position the paper (14). As shown in Figure 2, this paper is transported by the paper feed roller (
18) from the hopper (12) and supplied to the platen (2o). The driving force of a platen drive motor (not shown) is transmitted to the paper feed roller (18) via a platen gear (24) fixed to the platen shaft (22), which rotates the paper feed roller (1B) to feed the paper ( 14) Please send it to us. Hopper (1
The paper (14) fed out from 2) is further guided by guide rollers (26) and (28) below the platen (2o), and is sent to a position where it can be printed by the print head (30), which is a recording section. . A paper detector (32) is provided at the paper passage point below the platen (20).
by this.

The leading edge of the paper (14) is detected and based on this, the paper (
In step 4), the printing position is controlled.

Above the print head (3o), there is a stacker as part of the paper tray that collects and stores the recorded paper.
'(34) is erected. This stacker has guide rollers (36) for guiding the paper (14) into it.
38) is installed. Furthermore, a re-supply hopper (40) serving as a paper re-supply unit is provided upright on the platen (2o) between the stacker (34) and the hopper (12).

This refeed hopper has a lower supply port (4) as shown in the figure.
0a) is positioned between the deflector (42) located below and the peripheral surface of the platen (20), and the leading edge of the paper (14) is inserted between them.

In this way, the stacker (
34) and the refeed hopper (40), a paper section (44) is disposed in the longitudinal direction of the platen (20). This division has a support shaft (46
), and there is a shaft (48) on the tip side.
A pressure roller (50) is attached via. This pressure roller is in contact with the platen (20) as shown in FIG. The container (44) for this division is rotated appropriately as described later, and the paper (1) is placed on the platen (2o).
4) to selectively supply only either the stacker (34) or the refeed hopper (40). In this section, the rotation of the device (44) is controlled by a magnet (5), which is operated by an appropriate control signal, as shown in Figure 1.
2). This magnet has its movable actuator (54) connected to a link (56), and this link is integrally connected to the support shaft (46) of the vessel (44).

When printing on a cut sheet (14) based on the recording apparatus of the present invention having the above-described structure, the operation is performed as shown in FIGS. 2 to 7, for example.

First, as shown in FIG. 2, the paper (14) accommodated in the hopper (12) passes over the deflector (42) and onto the platen (2) as the paper feed roller (18) rotates.
0). At this time, the leading edge of the paper (14) passing over the paper detector (32) is detected, and the printing position by the print head (30) is controlled based on this.

When the printing position is controlled, the paper (14) is fed to the printing position by the print head (30), as shown in FIG. 3, and is fed while being appropriately printed.

Next, if the paper (14) is to be fed again to the platen (20) in order to print on the back side of the paper (14), the fourth
The paper (14) is re-supplied to the hopper (40) as shown in the figure.
Guide it to the side and send it out. But in this case,
If you want to collect the paper (14) that has been printed on the front side into the stacker (34) as a printed paper without printing on the back side, you can use the magnet (52) to separate the paper (44) using the two-dot chain line in the figure. position to block the path from the platen (20) to the refeed hopper (40) and form a path for paper to the stacker (34).

Therefore, when printing also on the back side of the paper (14).

As shown in FIG. 5, the paper (14) is placed on the platen (20).
and the pressure roller (50) to re-feed hopper (4).
0) It is pushed inward and sent.

When the trailing edge of the pushed-up paper (14) leaves the platen (20), the paper that has entered the re-feeding hopper (40) is reversed, that is, turned inside out, as shown in FIG. Place the platen first (20)
It will be inserted below. Additionally, in this case, as described above, the paper (14) is separated by rotating the container (44) so that the paper (14) can be guided to the stacker (34) and collected after printing.

Therefore, as shown in FIG. 7, the paper (14) that is fed to the platen (20) again and wrapped around it is printed on its back side, and then sent to the stacker (34) and collected there. Ru. After that, new unprinted paper is fed from the hopper (12) to the platen (20), and the paper is automatically divided into two sides by controlling the paper supply path by rotating the device (44). It will also be printed.

In the embodiment of the present invention described above, the hopper (12) is attached to, for example, the main body frame (lO) as a paper supply section. However, a detachable cassette-type paper supply unit may also be used. Furthermore, the above-described embodiments have been described using a serial dot-type printer as an example.

However, this invention may be a line type instead of a serial type, and a so-called thermal type as opposed to a dot type.
Digi inkjet laser! It is applicable to various types of printers such as electrostatic. Of course, the present invention is widely applicable not only to printing devices such as printers but also to recording devices such as copying machines and facsimile machines.

According to the present invention, in a recording device that records on cut paper, the paper is automatically reversed to easily record on both sides of the paper, thereby saving labor. It is possible to save electricity on recording paper.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a printer which is an embodiment of the recording device of the present invention, and FIGS. 2 to 7 are schematic side views of this printer to explain the feeding of paper in stages. Figure 2 shows the stage of feeding the paper from the hopper to the platen, Figure 3 shows the stage of feeding the paper to the printing position, and Figure 4 shows the stage of guiding the paper towards the refeeding section after printing. , Fig. 5 shows the stage in which the paper is stored in the re-feeding section, Fig. 6 shows the stage in which the paper is reversed in the re-feeding part and re-supplied to the platen, and Fig. 7 shows the stage in which the paper is printed on the back side of the paper. It is a schematic side view which shows the stage which collect|recovers to a stacker later.

Claims (1)

[Claims] A paper supply unit that supplies cut sheets, a recording unit that records on the paper supplied from the paper supply unit, a paper receiving unit that collects the recorded paper, and recorded paper that is not sent to the paper receiving unit. a paper re-supply section that inverts and re-feeds the recorded paper to the recording section; a paper re-supply section that rotates between the paper re-supply section and the paper receiving section to selectively form a paper feeding path as appropriate; a sorting unit that determines whether to send the paper to the paper receiving unit or to the paper resupply unit.