JP2864555B2 - Printing paper feeder for printer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a printing paper feeding device of a printing device used by connecting to a computer or the like.

[Conventional technology]

In general, printing paper used in a printing device connected to a computer or the like includes a single-sheet printing sheet (hereinafter referred to as a single sheet) and a continuous sheet printing sheet (hereinafter referred to as a continuous sheet) in which a plurality of sheets are connected. ). Conventionally, when these cut sheets and continuous forms are used in a printing apparatus, each time the cut forms or continuous forms are used, they are mounted on a printing paper feeder of the printing apparatus.

FIG. 4 shows an example of a printing paper feeder of the above-described conventional printing apparatus. In the drawing, (1) is a platen which is a metal cylinder covered with rubber and serves as a cradle for printing, and (2) is disposed above the platen (1) at a predetermined interval and is provided with a platen (1). A) A printing portion is formed together with the platen (1) by a print head that prints on the printing paper disposed above. (6) is a tractor for moving the continuous form and supplying the continuous form to the printing unit, (3) is a plurality of drive rollers that rotate in synchronization with the rotation of the motor, and (4) is rotated around the drive roller (3). A plurality of pinch rollers and a driving roller (3) that are movably pressed against each other and rotate in conjunction with the rotation of the driving roller (3).
a), (3b) and the pinch rollers (4a), (4b) and the guide rails (5a) and (5b) form a supply unit for supplying a cut sheet to the printing unit, and the drive rollers (3c) and ( 3d), (3f)
The pinch rollers (4c), (4d), (4f) and the guide rails (5e), (5f), (5g), (5h) form a discharge section for discharging a cut sheet or a continuous form. The discharge unit is configured to select one of two discharge directions by switching the position of the guide (19).

Next, the operation of this device will be described. In the case of using a continuous form in FIG. 4, the continuous form is supplied to the printing section by the tractor (6), and after printing, is retracted to the insertion slot or discharged by the discharge section. When using a cut sheet, the cut sheet is supplied to the printing section by the supply section,
After printing, it is retracted to the insertion slot or discharged by the discharge unit. When ejecting both single and continuous forms, switch the position of the guide (19) to change the drive roller (3).
c), (3d) and the direction of the discharge section formed by the pinch rollers (4c) and (4d) and the guide rails (5e) and (5f);
Drive rollers (3c), (3f) and pinch rollers (4c), (4
f) and the guide rails (5g) and (5h) are selected and discharged in two directions, ie, the direction of the discharge section.

[Problems to be solved by the invention]

Since the printing paper feeder of the conventional printing device is configured as described above, if you want to cut a sheet after using a continuous form, you must either evacuate the continuous form to the insertion slot or delete all the continuous forms. There was a problem that the operation had to be performed, and the operation was complicated and required a considerable amount of time.

The present invention has been made in order to solve the above-described problems. Even when using a continuous form and then using a single form,
An object of the present invention is to provide a printing paper feeder of a printing apparatus which does not need to retreat or discharge the continuous form and can use a single form while the continuous form is used.

[Means for solving the problem]

A printing paper feeder of a printing device according to the present invention is a first supply unit that supplies a cut sheet printing paper to a planned printing position of a printing unit formed of a print head and a platen for printing on printing paper, A second supply unit that supplies continuous form printing paper and is disposed below the first supply unit, a first discharge unit that discharges the print paper supplied by the first or second supply unit, The second discharge unit disposed only below the first discharge unit that discharges only the continuous form printing paper supplied by the second supply unit, the position of the scheduled printing position and the first discharge unit A first position that guides the printing paper from the planned printing position to the first discharge unit and a second position that guides the continuous form printing paper from the planned printing position to the second discharge unit Guide piece that selectively moves between two positions A pinch roller that presses against the platen when the guide piece is at the first position and separates from the platen when the guide piece is at the second position; the pinch roller presses against the platen At this time, the platen is configured to be rotatable.

[Action]

Since the second discharge unit in the present invention is provided with a detachable pinch roller on the platen, the leading end of the continuous paper is passed through a gap generated when the pinch roller is detached from the platen, and the pinch roller is When the platen is rotated while being pressed against the platen, sheets of the continuous form are discharged.

(Example of the invention)

An embodiment of a printing paper feeding device of a printing device according to the present invention will be described below with reference to FIGS. FIG. 1 is a side view showing a printing paper feeding device. In the drawing, (1) is a metal cylinder covered with rubber on its circumferential surface and provided so as to be rotatable in the direction of the arrow, and serves as a receiving stand for printing. A platen (2) is a print head that is disposed above the platen (1) at a predetermined interval and prints on a print sheet disposed on the platen (1), and forms a printing portion with the platen (1). . (3) is a plurality of drive rollers that rotate in synchronization with the rotation of the motor, (4) is a plurality of pinch rollers that are rotatably pressed against the drive rollers and rotate in conjunction with the rotation of the drive rollers, (5). Is a guide rail that guides the transport of printing paper, each with multiple drive rollers (3a),
(3b), multiple pinch rollers (4a) and (4b), and multiple guide rails (5
(a) and (5b) form a first supply unit that supplies a cut sheet to the expected printing position of the printing unit. (6) is a belt on the circumference provided with a plurality of projections (7) which are disposed below the first supply unit and engage with paper feeding holes provided at both ends of the continuous paper (see FIG. (5c) and (5d) that move the continuous book by continuously circling (not shown)
Is a guide rail for guiding the continuous form supplied from the tractor (6) to the expected printing position of the printing section. The plurality of guide rails (5c) and (5d) and the tractor (6) are second guide rails. Forming a supply section. Each of the drive rollers (3c) and (3d) and each of the pinch rollers (4c) and (4d) and each of the guide rails (5
e) and (5f) form a first discharge unit for discharging the printing paper supplied from the first or second supply unit. The pinch roller (4c) is configured to be pressed against the drive roller (3c) only when the lever (8) is tilted, and when the above-mentioned first discharge unit is not used, as shown in FIG. Not in contact with drive roller (3c). A platen (6), a pinch roller (4e), which is disposed below the first discharge portion and is pressed by a spring against the platen (6), and a plurality of guide rails (5g), (5h), respectively.
A second discharging unit formed only by and discharging only the continuous form;
(9) is provided between the scheduled printing position of the printing section and the first discharge section, and guides the printing paper from the planned printing position to the first discharge section as shown in FIG. As shown in FIG. 2, when the continuous form is discharged to the second discharge portion as shown in FIG. 2, the continuous form is rotated clockwise about the fulcrum (10) and engaged with the continuous form to thereby form the continuous form. It is a guide piece provided so as to be able to select a second position for guiding to the second discharge portion.

Next, the operation of this device will be described. When both the cut sheet and continuous form are discharged from the first discharge unit in the direction of arrow B,
As shown in FIG. 1, the guide piece (9) is used in the state of the first position, and the cut sheet is inserted into the first supply section from the direction of arrow D and returned to the insertion slot after printing, or the first sheet is taken out. It is discharged in the direction of arrow B from the discharge section. The continuous form is inserted into the second supply unit from the direction of arrow A, returned to the insertion port after printing, and taken out, or discharged from the first discharge unit in the direction of arrow B. When the guide piece (9) is in the first position as described above, if the form is used as it is after using the continuous form, the form is going to enter the continuous form of the first discharge section. Also, since the rotation of the drive roller (3c) is not transmitted to the pinch roller (4c), it cannot enter and cannot be discharged. When alternately using a single form and a continuous form, the continuous form is first conveyed to a position immediately before the above-described printing position, stopped at the position immediately before the position, and then the guide piece (9) is moved as shown in FIG. After being moved to the second position, the continuous form is transported again, and the leading end of the continuous form is a predetermined length guide piece (9).
The guide piece (9) moves again at the point in time when it enters below, and returns to the first position and becomes ready for printing on the continuous form. The continuous form printed in this state is discharged from the second discharge unit in the direction of arrow C. Next, when the continuous conveyance is stopped and the cut sheet is to be used as it is, the cut sheet is inserted into the first supply unit in the direction of arrow D, and the continuous sheet on the platen (1) is printed in the printing unit. Is printed from above and returned to the insertion slot after printing, or is ejected in the direction of arrow B from the first ejection section. The details of the operation when the guide piece moves from the first position to the second position as described above will be described with reference to FIG. The rotation of the motor (not shown) rotates the shaft gear (11) of the motor, and the geared cam (12) meshing with the shaft gear (11) rotates clockwise to rotate the lever 1 (1).
Rotate 3) and guide the link (14). The guide piece (9) pulled by the guidance of the link (14) rotates clockwise around the fulcrum, and at the same time, the lever 2 (15) provided on the guide piece (9) moves the lever 3 (1).
6) to rotate the lever 3 (16) counterclockwise about the rotation shaft (17). A pinch roller (4c) rotatably provided at the tip of a plurality of springs (18) is attached to the lever 3 (16), and when the guide piece (9) is at the second position. When the guide piece (9) is away from the platen (1) and is at the first position, it operates so as to press against the platen (1). When the guide piece (9) is at the first position and the continuous paper is discharged to the second discharge part, the platen (1) itself rotates counterclockwise and the platen (1) functions as a driving roller. Then, the continuous paper is sandwiched between the plurality of pinch rollers (4e) and the continuous paper is discharged in the direction of arrow C.

〔The invention's effect〕

As described above, according to the present invention, when the pinch roller is in pressure contact with the platen, the platen is configured to be rotatable, so that manual operation is not required after the continuous supply by the second supply unit. Thus, there is an effect that a printing paper feeding device of a printing device which can be normally printed can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a printing paper feeder of a printing apparatus according to an embodiment of the present invention, FIG. 2 is a side view showing a state during the operation, and FIG. 3 is a side view showing a structure of a driving portion of a guide piece. FIG. 4 is a side view showing a printing paper feeding device of a conventional printing device. In the figure, (1) is a platen, (2) is a print head,
(3) is a drive roller, (4) is a pinch roller, (5) is a guide rail, (6) is a tractor, and (9) is a guide piece. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] A first supply unit for supplying a single-sheet printing paper to a printing position of a printing unit formed by a printing head and a platen for printing on a printing paper; A second supply unit disposed below the first supply unit, a first discharge unit that discharges the printing paper supplied by the first or second supply unit, and a second supply unit. A second discharge unit that discharges only the supplied continuous form printing paper and is disposed below the first discharge unit, disposed between the scheduled printing position and the first discharge unit, A position between a first position for guiding the printing paper from the planned printing position to the first discharge unit and a second position for guiding the continuous form printing paper from the planned printing position to the second discharge unit. Guide piece that moves selectively, when this guide piece is in the first position Includes a pinch roller that presses against the platen and separates from the platen when the guide piece is at the second position, and discharges the continuous form printing paper to the second discharge unit by rotating the platen. A printing paper feeding device for a printing device.