JP2552718B2 - Printer paper transport device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a print sheet conveying device of a printer.

[Prior Art] An example of a conventional print sheet conveying device is shown in FIG.

In the figure, reference numeral (1) is print paper, (2a),
(2b) is the upper and lower paper guides that sandwich the print paper (1) to guide its movement, and (3a) and (3b) are the prints guided by the paper guides (2a) and (2b). Upper and lower rollers for feeding the paper (1) to the next, and rotate in the arrow direction.

Since the conventional device is configured as described above, when the print sheet (1) is conveyed, it is provided so as to correctly supply the print sheet (1) between the upper and lower rollers (3a), (3b). Paper guides (2a), (2b)
The printing paper (1) is fed through the space, then is sandwiched between the upper and lower rollers (3a), (3b), and is fed next by the rotation thereof.

[Problems to be Solved by the Invention] Paper to be printed is
During printing in a print that is printed using thermal energy, the print paper causes a paper warp due to the thermal energy provided during printing.

When the printed paper is conveyed in the apparatus or discharged to the outside of the apparatus, as described in the section of the related art above, the print paper is moved up and down by the paper guide (2
A) and (2b) are arranged to restrain the paper sled, and the paper is conveyed by at least a pair of upper and lower rollers (3a) and (3b).

As described above, the conventional device has a problem that it requires a roller and a paper guide that have high accuracy and are difficult to process, assemble, etc. in terms of accuracy, and solve such a problem. There was a problem to do.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a print sheet conveying device for a printer that does not require high precision, is easy to process and attach, and is economical. .

[Means for Solving the Problems] A print sheet conveying device for a printer according to the present invention is
The U-shaped paper edge receiving part is formed at the rear end while receiving the print paper that is printed and sent out, and it is moved in the print paper conveyance direction by the reverse drive of the drive source connected through the one-way clutch. A paper ejecting lever that is configured to be capable of being mounted, and a shaft that is connected to a drive source through a friction clutch and extends along a direction perpendicular to the paper conveyance direction, and is rotated to rotate the paper end when rotated downward. A paper pressing lever that presses the print paper by entering a notch formed in a part of the receiving portion is provided.

[Operation] Since the device of the present invention is configured as described above,
When the print paper is delivered, the print paper rides on the paper push-out lever, and then the forward rotation of the motor causes the paper pressure lever to rotate via the friction clutch, and the tip of the print paper is notched. And press the rear edge of the print paper.

Next, when the motor is driven in the reverse direction, the paper push-out lever is pushed in the print paper conveyance direction via the one-way clutch, so that the rear end of the print paper is engaged with the U-shaped paper end receiving portion and In that state, the sheet is continuously pushed and conveyed in the conveying direction. At that time, the paper pressing lever is separated from the paper pushing lever through the cutout portion, and the paper pressing lever is raised by the reverse rotation of the motor to prepare for the next.

The rotation of the motor is stopped by the friction clutch and the one-way clutch after the paper pressure lever is lowered and hits the paper push lever, and after the paper push lever is moved forward or backward and stopped. To be done.

[Embodiment] The present invention will be described below with reference to the drawings showing an embodiment thereof.

In FIG. 1, reference numeral (1) is print paper, (11)
Is a base, and (12) is configured to be movable on the base (11) in the conveying direction (13) of the print paper (1). It is a paper ejecting lever in which a paper edge receiving portion (12a) having a V shape is formed, and the movement of the paper ejecting lever (12) is performed via a one-way clutch (not shown).
The drive source, for example, the motor (14) is configured to move by reverse rotation. In addition, the paper edge receiving portion (12a),
The notch (12b) is formed in a part thereof.

Next, reference numeral (15) indicates that the paper end receiving portion (12
A shaft (16) provided parallel to a) is fixed, and is a paper pressing lever that is rotated by the rotation of this shaft (16), the tip of which moves downward so as to enter the notch (12b). The tip portion is configured to be able to press the print paper (1) via the elastic body (17) attached thereto. The shaft (16) is connected to the motor (14) via a friction clutch (18), and a reduction gear such as a worm (19) is provided between the motor (14) and the friction clutch (18). They are connected by a worm gear (20).

Since this embodiment is constructed as described above, it operates as shown in FIGS.

1) The printed printing paper (1) is sent onto the paper pushing lever (12) (Fig. 2A).

2) When the motor (14) is normally rotated (X direction in FIG. 1) and the shaft (16) is normally rotated in X direction, the paper pressing lever (15) is also rotated and its tip is a notch (12b). It goes inside and descends, and presses the print paper (1) by the elastic body (17) at its tip (Fig. 2B).

In this case, even if the motor (14) continues to rotate in the normal direction, slippage occurs in the friction clutch (18) after the tip of the paper pressing lever (15) contacts the lower part, and the driving force of the motor (14) is increased. Is not transmitted to the shaft (16). Further, because of the one-way clutch, the paper pushing lever (12) does not operate in this case.

3) When the motor (14) is rotated in the reverse direction, the driving force of the motor (14) causes the sheet push-out lever (12) to act in the direction of arrow P via a one-way clutch (not shown) to move the print sheet (1) to the rear side. Make sure that the edge is in the U-shaped part of the paper edge receiver (12a). In that case, the paper pressure lever (15)
Passes through the notch (12b) of the paper push lever (12),
The operation of the paper pushing lever (12) is not hindered, and the paper pressing lever also rotates by this reverse rotation and starts to rise (Fig. 2C). After that, the paper push lever (12) continues.
Moves in the P direction to convey the print paper (1), and the paper pressing lever (15) rotates to return to the initial state (FIG. 2D). In this case, the lower edge of the paper pressing lever (15) hits a stopper (not shown), and the rotation of the paper pressing lever (15) stops, but in that case,
Even if the motor (14) still rotates, the friction clutch (1
With 8), there is no hindrance to the rotation of the motor (14) and the stop of the paper pressing lever (15).

In the above embodiment, the print paper (1) is, for example, in the direction opposite to the direction in which the print paper is printed and sent out.
Although an example of the case of being conveyed is shown, the present invention is not limited to this, and as shown in FIG. 3A or B, the direction of conveyance (S) may be perpendicular to the direction (S) in which it is sent out. The device (21) of the invention may be provided laterally so that it can be conveyed in the same direction (T ') as the direction (S) in which it is sent out, as shown in FIG. 3C. It is also possible to have a configuration as described above, and in any of the above cases, the same effect as that of the above embodiment is obtained.

[Effects of the Invention] As described above, according to the present invention, the U-shaped paper end receiving portion is formed at the rear end while receiving the print paper that is printed and sent out, and is connected through the one-way clutch. A paper push-out lever configured to be movable in the print paper transport direction by the reverse drive of the drive source, and a shaft connected to the drive source via a friction clutch and extending in a direction perpendicular to the paper transport direction. Each member has a high precision because it is equipped with a paper pressing lever that presses the print paper by entering the notch formed in a part of the paper end receiving portion when it is attached to the It is not necessary to do so, it is easy to assemble, and this component can be made into a unit by making it compact, so that it is economical, does not cause paper jams, and is stable in pre-printing. This has the effect of providing a print sheet conveying device of a printer that can convey a printed sheet.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, and FIG.
3A, 3B, 3C, 3D, 3A, 3B, 3C, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, 3D, and 3D, respectively
A, B, and C are layout diagrams of other three types of embodiments in the carrying-out direction of the present invention, and FIG. 4 is a schematic explanatory view of a print sheet conveying device of a conventional printer. (1) …… Print paper, (12) …… Paper push lever, (12a) …… Paper edge receiving part, (12b) …… Notch part, (1
4) …… Drive source (motor), (15) …… Paper pressing lever, (16) …… Shaft, (18) …… Frictional clutch. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. A print sheet is formed by receiving a print sheet that has been printed and sent out, and has a U-shaped sheet end receiving portion formed at a rear end thereof, and is driven in reverse by a drive source connected through a one-way clutch. Attached to a sheet push-out lever configured to be movable in the transport direction and a drive source connected through a friction clutch and extending along a direction perpendicular to the transport direction, and pivoted downward. In this case, the print sheet conveying device of the printer is provided with a sheet pressing lever that presses the print sheet by entering a notch formed in a part of the sheet edge receiving section.