JPH0632002A - Printer - Google Patents

Abstract

PURPOSE:To easily eliminate the jam of a printer for printing letters on a roll paper. CONSTITUTION:When letters are printed on a roll paper 2 and the roll paper 2 being carried between carrier guides A5 and B6, passing through a cutter part 7 and being discharged from a discharge port 9 to the outside of a printer causes a jam in the vicinity of the discharge port 9 before it is cut by the cutter part 7, the rotationally movable jam-avoiding guide of a jam-avoiding guide part 8 equipped between the discharge port 9 and cutter part 7 is opened downward by the use of the paper-reserving device of the roll paper 2. Thus, it is possible to easily take out the roll paper from the lower side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, and more particularly to a printer using roll paper.

[0002]

2. Description of the Related Art A conventional printer will be described with reference to the drawings.

FIG. 3 is a side view showing the structure of a conventional printing apparatus.

As shown in FIG. 3, the conventional printing apparatus using roll paper has a roll paper holder 1, a roll paper 2, a platen 3, a thermal printing section 4, and a conveyance guide A.
5, a conveyance guide B6, a cutter unit 7, a jam retreat guide unit 8, a discharge port 9, and a paper guide 15.

Next, the operation of the conventional printing apparatus will be described with reference to the drawings.

In FIG. 3, when a print command is issued,
A drive motor (not shown) for rotating the platen 3 is driven to rotate the platen 3, whereby the roll paper 2 wound around the roll paper holder 1 is conveyed, passes through the platen 3, and is pressed against the thermal printing unit 4. Printing is carried out while being conveyed by the printing unit. Then, the sheet is conveyed between the conveyance guide A5 and the conveyance guide B6, passes through the cutter unit 7 and the sheet guide 15, and is discharged from the discharge port 9 to the outside of the printing apparatus.

Here, when the roll paper 2 discharged to the discharge port 9 is prevented from advancing, a paper jam (hereinafter referred to as a jam) occurs near the discharge port 9. This causes a jam because the roll paper 2 is prevented from advancing between the cutter unit 7 and the paper guide 15. As a result, the roll papers 2 overlap each other and become jammed.

[0008]

In the conventional printing apparatus described above, when a jam occurs, the roll papers coming out from the discharge port overlap each other, that is, the roll papers cannot be removed by the operator by hand. In order to remove the jammed roll paper, the roll paper must be removed one by one using tweezers or the like, which is troublesome.

An object of the present invention is to provide a jam retracting guide that is rotatably movable by opening the jam retracting guide by rotating the jam retracting guide downward by utilizing the strength (strain) of the jammed roll paper. It is an object of the present invention to provide a printing device that eliminates the above-mentioned drawbacks and makes it easy to remove jams of the printing device that prints on roll paper by adopting a structure that comes out.

[0010]

SUMMARY OF THE INVENTION A printer according to the present invention includes a printing unit for printing a predetermined content on roll paper, a transport unit for transporting the roll paper, and cutting the transported roll paper to a predetermined length. In a printing device having a cutter unit, a jammed paper evacuation guide unit is provided for retracting the jammed roll paper when the roll paper causes a jam during conveyance and the jammed roll paper. .

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a side view showing the construction of a printing apparatus according to an embodiment of the present invention, and FIG. 2 is a partial detailed view of the jam retraction guide portion shown in FIG.

As shown in FIGS. 1 and 2, the printing apparatus of this embodiment has a roll paper holder 1, a roll paper 2, a platen 3, a thermal printing unit 4, a transport guide A5, and a transport guide B6. And a cutter unit 7, a jam retreat guide unit 8, and a discharge port 9. The jam retreat guide unit 8 includes a fixed guide C10, a jam retreat guide 11, and a rotating shaft 12.
And a torsion spring 13. Then, when the roll paper 2 is jammed, the roll paper 2 is curled into a roll paper curl state 14.

Next, the operation of the printing apparatus of this embodiment will be described with reference to the drawings.

In FIG. 1, when a print command is issued,
A drive motor (not shown) for rotating the platen 3 is driven to rotate the platen 3, whereby the roll paper 2 wound around the roll paper holder 1 is conveyed, passes through the platen 3, and is pressed against the thermal printing unit 4. Printing is carried out while being conveyed by the printing unit. Then, it is conveyed between the conveyance guide A5 and the conveyance guide B6, passes through the cutter portion 7 and the jam retreat guide portion 8, and is discharged from the discharge port 9 to the outside of the printing apparatus.

Next, the actual operation of the jam retraction guide portion 8 when the roll paper 2 is jammed at the discharge port 9 will be described with reference to FIG.

In FIG. 2, when the roll paper 2 is prevented from advancing by the discharge port 9, the roll paper 2 is sent out to the discharge port 9 through the platen 3, so that the roll paper 2 is cut by the cutter section 7 and the discharge port 9. Between, and the force to get out somewhere works. The guide C10 and the jam retreat guide 11 fixed to the discharge port 9 using the strainer of the roll paper 2 serve as the fulcrum of rotation, and the torsion spring 13 urged between the rotation shafts 12 constantly exerts a constant force. Is keeping an angle that is. When the forward movement of the roll paper 2 is obstructed, the roll paper 2 is curled by the strain of the roll paper 2 and the jam retreat guide 11 opens downward in the arrow (→) direction. As a result, the roll paper 2 can be ejected while curling downward from the tip of the cutter unit 7 and can be taken out by hand.

[0018]

As described above, the printing apparatus of the present invention is a printing apparatus for printing on roll paper, and the jam retract guide is moved downward by utilizing the strength (strain) of the jammed roll paper. By providing a structure in which the jammed paper retracts by rotating the jammed paper to the side and opening the jammed paper, the jammed paper can be easily removed by hand when a jam occurs.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a partial detailed view of a jam retraction guide portion of FIG.

FIG. 3 is a side view showing a configuration of a conventional printing device.

[Explanation of symbols]

 1 Roll Paper Holder 2 Roll Paper 3 Platen 4 Thermal Printing Section 5 Transport Guide A 6 Transport Guide B 7 Cutter Section 8 Jam Evacuation Guide Section 9 Ejection Port 10 Fixed Guide C 11 Jam Evacuation Guide 12 Rotation Axis 13 Torsion Spring 14 Roll Paper Curl State 15 Paper guide

Claims (1)

[Claims] 1. A printer having a printing unit for printing a predetermined content on roll paper, a transport unit for transporting the roll paper, and a cutter unit for cutting the transported roll paper into a predetermined length. If the roll paper jams during transportation of the roll paper in the transport unit,
A printing apparatus comprising a jammed paper evacuation guide unit for retracting the jammed roll paper.