JPH0541809U - Paper ejection mechanism in paper feeding and ejecting device - Google Patents

Abstract

(57) [Summary] [Purpose] A single paper ejection function satisfies both single-cut paper that requires paper ejection and continuous paper that does not require paper ejection. In a discharge device configured to discharge a print sheet by sandwiching it between discharge rollers 8 and 9, the object is achieved by changing the distance between the axes of the discharge rollers depending on the sheet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper feeding / discharging device of a printer, and more particularly to a paper discharging mechanism.

[0002]

[Prior Art]

 A conventional example will be described with reference to FIG. 5 described in the publication of Utility Model No. 2-82554. In the printing apparatus 101 in which the cut sheet 116 and the continuous sheet 117 can be used, the paper feed roller 118 for feeding the cut sheet 116 from the hopper 103 for accumulating the cut sheet 116 and the both ends of the continuous sheet 117 are provided. By the tractor 114 that feeds through the hole formed through the pin 114a, the single-cut sheet 116 or the continuous sheet 117 is fed to the platen 113 where printing is performed and printed. The printed single-cut sheet 116 is positioned above the platen 113 and is discharged by the discharge rollers 106, 107, 108, and 109 that press and discharge the single-cut sheet 116. It is delivered to the stacker 105 located at the rear. Further, the printed continuous paper 117 is positioned above the platen 113 and is discharged to the rear through the stacker board 115 by the discharge rollers 106, 107, 108 and 109 which press and discharge the continuous paper 117. The mechanism was known.

[0003]

[Problems to be solved by the device]

 However, in such a paper ejection mechanism, since the pressures of the paper ejection rollers applied to continuous paper and single-cut sheets are the same, if the set pressure of the paper ejection rollers is weak, the paper ejection force for single-cut sheets will be small, and The problem that the form paper is not ejected to the stacker and the set ejection roller pressure is high, the ejection force of the continuous paper becomes strong and the continuous paper is pulled strongly toward the ejection roller, and the continuous paper comes off from the pin of the tractor. There was a problem.

[0004]

[Means for Solving the Problems]

 A single-cut sheet or continuous sheet is formed by making it possible to move the sheet-ejection roller that ejects the printed single-cut sheet or continuous sheet by pressing it from the front and back, and the sheet-ejection roller shaft that transmits power to the sheet ejection roller. The pressure applied to the paper can be changed to change the paper ejection force, and the object of the present invention can be achieved.

[0005]

[Action]

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

FIG. 1 is a perspective view of a paper discharge mechanism of the paper feeder of the present invention. FIG. 2 is a cross-sectional view of the paper discharge mechanism of the paper supply / discharge apparatus of the present invention. FIG. 3 is an operation diagram of the paper discharge switching lever of the paper discharge mechanism of the paper supply / discharge apparatus of the present invention when a single-cut sheet is used. FIG. 4 is an operation diagram of the paper discharge switching lever of the paper discharge mechanism of the paper supply / discharge apparatus of the present invention during continuous paper.

[0007]

【Example】

 In FIG. 1, a paper feeding / discharging device 2 is mounted on top of a printing device 1. At the center of the sheet feeding / discharging device 2, there is a hopper 3 for accumulating the cut sheet 16 shown in FIG. A front frame 4 is provided in front of the hopper 3, and above the front frame 4, as shown in FIG. 1, a stacker 5 for accumulating a cut sheet 16 printed in a V-shape is configured. In front of the front frame 4, there are paper discharge rollers 6, 7, 8 and 9 for delivering cut sheets 16 and continuous paper 17 printed. The paper discharge rollers 6, 7, 8, 9 are fixed to the paper discharge roller shafts 6a, 7a, 8a, 9a, and the paper discharge roller shafts 6a, 7a, 8a, 9a are provided on both sides of the paper supply / discharge device 2. It is supported by the left side frame 10 and the right side frame 11 provided. On the left side frame 10 side of the shaft of the paper discharge roller 9, there is a switching lever 12 having the function of a cam shown in FIG. The switching lever 12 is supported by a fulcrum 10a protruding from the left side frame 11 and can rotate up and down about the fulcrum 10a. When the switching lever 12 is moved up and down, the discharge roller shaft 9a can be moved along a cam provided on the switching lever 12 and an elongated hole 10b formed in the left side frame 10. By moving the paper discharge roller shaft 9a, it is possible to widen the space between the paper discharge roller 9 and the paper discharge roller 8. Below the discharge rollers 6 and 7, there is a platen 13 for printing cut sheets 16 and continuous forms 17 formed in the printer 1. At the rear of the platen 13, a tractor 14 for inserting and feeding a pin 14a into holes formed in both sides of the continuous paper 17 is configured. The cut sheet paper 16 accumulated in the hopper 3 is fed to the platen 13 where the printing device 1 prints. The cut-sheet paper 16 fed to the plantain 13 passes between the discharge rollers 6 and 7 and is discharged to the discharge rollers 8 and 9. Since the switching lever 12 of the paper discharging roller 9 is raised, the distance between the shafts of the paper discharging roller 8 and the paper discharging roller 9 is narrowed, and the force for discharging the cut sheet 16 is increased. The cut sheets 16 delivered to the delivery rollers 8 and 9 are delivered to the stacker 5 and accumulated. The continuous paper 17 is fed to the platen 13 by the tractor 14. The continuous paper 17 fed to the platen 13 passes between the paper discharge roller 6 and the paper discharge roller 7, and is discharged to the paper discharge rollers 8 and 9. By lowering the switching lever 12 of the paper discharging roller 9, the distance between the shafts of the paper discharging roller 8 and the paper discharging roller is widened, and the force for discharging the continuous paper 17 is weakened. The continuous paper 17 discharged to the discharge roller 9 is discharged rearward along the stacker board 15 which is an extension of the stacker 5.

[0008]

[Effect of the device]

 Since the paper discharge roller shaft 9a is movable so that the distance between the paper discharge roller 8 and the paper discharge roller 9 can be adjusted, for continuous paper that is always connected continuously from the tractor to the paper discharge roller, the paper discharge roller The paper ejection force is weakened by separating the axes of the paper ejection rollers 8 and 9 and the slight difference in the feed amount between the tractor and the paper ejection roller is slid between the paper ejection roller and the continuous paper. It has become possible to eliminate the pin misalignment. For single-cut sheets that require a force to be sent to the stacker, it is possible to discharge the single-cut sheets to the stacker by narrowing the axis between the discharge rollers 8 and 9 to increase the discharge force of the discharge rollers. Became.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a paper discharge mechanism of a paper supply / discharge device.

FIG. 2 is a cross-sectional view showing an embodiment of a paper discharge mechanism of the paper supply / discharge device.

FIG. 3 is an operation diagram (1) of the sheet discharge changing lever of the embodiment.

FIG. 4 is an operation diagram (2) of the sheet discharge changing lever according to the embodiment.

FIG. 5 is a conventional cross-sectional view.

[Explanation of symbols]

 1, 101 Printing device 2, 102 Paper feeding and discharging device 3, 103 Happer 4, 104 Front frame 5, 105 Stacker 6, 106 Paper discharging roller 6a, 106 Paper discharging roller shaft 7, 107 Paper discharging roller 7a, 107 Paper discharging roller Shaft 8, 108 Paper ejection roller 8a, 108 Paper ejection roller shaft 9, 109 Paper ejection roller 9a, 109 Paper ejection roller shaft 10, 110 Left side frame 11, 111 Right side frame 12 Switching lever 13, 113 Platen 14, 114 Tractor 15,115 Stacker board 16,116 Single sheet paper 17,117 Continuous paper 18,118 Paper feed roller 10a Support point 10b Oblong hole 14a, 114a Pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirofumi Sugane 347 Hino, Hino City, Tokyo Orient Clock, Hino Plant, Ltd.

Claims (1)

[Scope of utility model registration request] 1. In a paper feeding / discharging device of a printer using cut-sheet paper and continuous paper, a discharge roller and a discharge roller for discharging printed cut-sheet paper or continuous paper by press-contacting from the front and back. A paper ejection mechanism in a paper ejection device, characterized in that a paper ejection roller shaft for transmitting power can be moved to change a pressure applied to a single-cut sheet or continuous paper to change a paper ejection force.