JPS6216170A - Recorder - Google Patents

Abstract

PURPOSE:To provide a recorder simple in construction, low in cost and capable of secure automatic loading of a recording medium, by a construction wherein a recording medium is fed to a platen in the state of being pressed against a pinch roller when feeding the medium. CONSTITUTION:The pinch roller 2 is disposed in a notch formed in an end part of a paper guide 9, and is pressed against the platen 1. With the platen 1 rotated in the direction of arrow A, the pinch rollers 2, 4 are rotated in the directions of arrows. A plunger 13 oscillates a cassette 10 upward, whereby the recording media contained in the cassette 10 are pressed against the pinch roller 2, and the recording medium 10a is let out. Rotation of the platen is switched from reverse rotation to forward rotation, whereby a leading end part of the medium is rolled in between the platen 1 and the pinch roller 4. Then, the medium is fed further upwared to a position for recording by a recording head 17, the pinch roller 2 is separated from the medium, and the medium is smoothly fed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device, and particularly to a recording device that performs recording while conveying a recording medium using a cylindrical platen.

[Prior Art] Recording devices of various types have conventionally been used as recording output devices such as computers or typewriters. Various materials such as paper and plastic film are used as recording media. In addition, various shapes of recording media such as roll paper, fan-hold paper, sheet paper, etc. are used.

[Problems to be solved by the invention] Continuous recording can be performed using roll paper, fan-hold paper, etc., but when using sheet-like media, it takes time and effort to load the recording medium for each document. Therefore, in view of this point, various automatic loading devices have been proposed. An automatic loading mechanism called an autofeeder or the like is often set as an optional part of the recording apparatus, and is constructed separately from the main body and used by being attached to the paper input section of the recording apparatus. Also, devices are known in which an automatic paper feeding mechanism for sheet paper is provided within the device, but in all of these devices, the roller for automatic paper feeding and its driving means are provided separately from the main body, so the configuration is complicated. However, there was a drawback that it was difficult to reduce costs.

In view of this, a configuration in which automatic paper feeding is performed directly by the platen that conveys the recording medium can be considered, but in this case, the platen must be placed so as to be in contact with the front end of a large number of stacked sheets. There is a problem that paper separation is good and double feeding occurs.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and performs recording while conveying a recording medium using a cylindrical platen and a pinch roller pressed against the platen. In the recording apparatus, a configuration is adopted in which the recording medium is conveyed to the platen by being pressed against the pinch roller during paper feeding.

[Function] As shown in FIG. 1, a roller 2 is provided in pressure contact with the platen 1, and the roller 2 is driven to rotate in the opposite direction to the platen 1. When the platen 1 is rotated in the opposite direction to the normal paper feeding direction while the recording medium stored in the cassette 10 is pressed against the roller 2 by the solenoid 12, the recording medium in the cassette 10 is conveyed as shown in FIG. Loaded onto platen 1. According to such a configuration, a new drive means for automatic paper feeding is not required.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the configuration of an automatic paper feeding mechanism of a recording apparatus.

Recording is performed on a recording medium wound around a cylindrical platen l by a recording head 17 that performs recording using a predetermined method. The recording head 17 is mounted on a gear ridge 16, and the recording head 17 is mounted on a gear ridge 16.

The ridge 16 performs recording scanning left and right by a drive means (not shown) along guide rails 14 and 15 arranged parallel to the platen l. The recording medium is pressed against the platen 1 by a pinch roller 4 rotatably supported on a shaft 5. Further, in order to bring the recording area into close contact with the platen 1, a pail roller 6.6 is disposed above the recording area of the recording head 17 via a shaft 7. The pail roller 6 is configured to be able to be removed from the platen l by a mechanism not shown. A paper guide 9 is provided at a recording medium loading section below the platen l. Further, a paper guide 8 is provided between the platen 1 and the paper guide 9 and extends to the rear of the platen 1. The paper guide 9 is formed to have a width approximately equal to the width of the platen l, and a pinch roller 2 is disposed in a notch 8a provided at the end thereof via a shaft 3, and this pinch roller 2 is pressed against the platen l. do. The pinch roller 2 is made of a material with a large coefficient of friction, such as low-hardness rubber, and its surface is knurled as necessary to increase the frictional force during paper feeding.

A cassette 10 containing recording media is arranged below a paper guide 8 extending behind the platen 1. The cassette 10 is rotatably supported on the guide bar 11 via a U-shaped hook 10a on the lower surface of the rear thereof.
It is driven and swung by a plunger 13 of a solenoid 12 so that the paper feed port at its tip is located in the middle of the paper guides 8 and 9. The cassette 10, like a known automatic paper feeder, is provided with separating means such as a separating claw for separating and ejecting recording media one by one.

FIG. 2 shows the configuration of a control system for controlling the above mechanism.

In Fig. i2, the reference numeral 30 controls each of the following members according to a control program, which will be described later, housed in a device consisting of a microcomputer or the like. The control device includes solenoid 1 shown in Figure 1.
2. A platen motor for driving the platen l, a carriage motor 32 for controlling the carriage l6, and a recording control section 33 for controlling the recording operation of the recording head l7 are connected by Vc.

Next, the operation of the above configuration will be explained with reference to FIGS. 3 to 5. FIG. 3 is a flowchart showing the control procedure of the control device 30 stored in the memory 34.

When automatically feeding paper prior to a recording operation, the control device 30 first moves the platen 1 in the direction of arrow A in FIG. 4 via the platen motor 3l in step 51 in FIG.
In other words, rotate it in the opposite direction to the normal paper feeding direction. This causes pinch roller 2.

4 rotate in the direction of the arrow in FIG.

Subsequently, in step S2, the solenoid 12 is driven,
The plunger 13 is protruded to swing the cassette 10 upward about the guide bar 11, and the uppermost recording medium stored in the cassette 10 is brought into pressure contact with the pinch roller 2.

As a result, the uppermost recording medium 10a is fed out as shown in FIG. 4 by the friction force of the pinch roller 2 and inserted between the paper guides 8.9. Since the cassette 10 is provided with separation means such as separation claws as described above, only one recording medium can be taken out at this time.

The unloaded recording medium 10a advances along the paper guide 9 and comes into contact with the pressure contact point between the pinch roller 4 and the platen 1.

Next, the control device 30 detects this contact state by counting the amount of rotation of the platen 1 and the amount of drive of the platen motor 31, and moves to step S3 to switch the rotation of the platen from reverse to normal rotation. As a result, as shown in FIG.
The paper is caught between the two, and is then conveyed further upwards to reach the printing position by the printing head 17. Also, in synchronization with the switching of the rotation of the platen, the solenoid 12 operates in step S4.
When the pinch roller 2 is turned off, the pinch roller 2 is separated from the recording medium, thereby controlling the recording medium to be conveyed smoothly.

When the recording medium reaches a predetermined position, the rotation of the platen 1 is stopped, and the pail roller 6, which has been separated from the platen 1, is brought into pressure contact with the platen 1 by manual or automatic operation as shown in FIG.

As a result, the recording medium is moved to the platen l by the pail roller 6.
The recording medium is pressed into contact with the platen so that the recording operation can be performed in a state where the recording medium is in complete contact with the platen.

Furthermore, a tray 20 and ejection rollers 18 and 19 are provided above the pail roller 6, and the recording paper after recording is transferred to the ejection roller 18 driven by a driving means (not shown).
, 19 and is discharged onto the tray 20. After the recording medium is ejected, a new recording medium is loaded onto the platen 1 by the same operation as described above.

If it is desired to feed the paper manually, the recording medium is manually inserted above the paper guide 8 and fed between the pinch roller 2 and the platen 1. Thereby, the platen 1 can be rotated manually or automatically to perform a paper feeding operation.

According to the above configuration, the automatic paper feeding system uses solenoid 1.
Since only two active parts are required and no other drive system is required, the configuration and control are simple, and reliable automatic sheet feeding operation can be performed.

In the above configuration, the recording medium is not limited to paper, and various materials such as a brass film for overhead projectors can be used. It goes without saying that any recording method such as inkjet, wire dot or other methods can be used as desired.

[Effects] As is clear from the above description, according to the present invention, in a recording apparatus that performs recording while conveying a recording medium using a cylindrical platen and a pinch roller that is pressed against the platen, the pinch roller is The present invention employs a configuration in which the recording medium is conveyed to the platen by being in pressure contact with a roller, so that the structure is simple and can be constructed at low cost, and an excellent recording device that can reliably automatically load the recording medium is provided. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an automatic paper feeding mechanism of a recording apparatus employing the present invention, FIG. 2 is a block diagram showing the structure of a control system used in the apparatus shown in FIG. 1, and FIG. Flowcharts of paper feed control, FIGS. 4 and 5 are explanatory diagrams sequentially showing the operation of the mechanism shown in FIG. 1. l...Platen 2, 4...Pinch roller 6
...Pail roller 8.9...Paper guide 10...
・Cassette 12... Solenoid Next Day 1 Marlov 7th Episode 2nd Figure 3

Claims (1)

[Claims] A recording apparatus that performs recording while conveying a recording medium using a cylindrical platen and a pinch roller pressed against the platen, characterized in that the recording medium is conveyed to the platen by being pressed against the pinch roller during paper feeding. Device.