Embodiments described herein relate to a paper discharging apparatus, a paper discharging method, an image forming apparatus and an image forming method.
At present, in an image forming apparatus, a printed paper is discharged through a conveyance path by a paper discharging function which is arranged at the rear part or section of the image forming apparatus. Then, the discharged paper can be taken by a user.
This paper discharging function is likely to lead to a problem that the paper is exposed to the outside before the print is completed and thus may be taken away by the user by mistake.
Therefore, the image forming apparatus is expected to discharge a paper only after required processes, such as, e.g., printing and the like are completed.
According to one embodiment, a paper discharging apparatus, comprising: a paper conveyance path;
a first conveying unit configured to convey a paper along the conveyance path;
a second conveying unit including a pinch roller and a feeding roller that are arranged closer to the downstream side than the first conveying unit in the paper conveying direction, the pinch roller and the feeding roller clamping the paper therebetween and conveying the paper along the conveyance path;
a movable mechanism, including a surface part having a specified shape, moving the surface part between a first position that the surface part is not contacted with the pinch roller and a second position that the surface part is contacted with the pinch roller through the paper and pushes the pinch roller until the pinch roller is separated from the feeding roller; and
a control unit configured to move the surface part to the second position by the movable mechanism, wherein the paper is clamped by the pinch roller and the surface part and the paper is bent through conveying the paper by the first conveying unit under this state, and to move the surface part to the first position by the movable mechanism, wherein the paper is clamped by the pinch roller and the feeding roller and the paper is discharged from the conveyance path by rotating the feeding roller under this state.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the present embodiment, a receipt printer for issuing a receipt paper on which the various information relating to the account settlement of a business transaction is printed is exemplarily described as the image forming apparatus A. The elements of the image forming apparatus relating to the paper discharging constitute the paper discharging apparatus described in this embodiment.
As shown in
The paper end sensor 14 is a sensor for detecting, for example, optically, existence or absence of paper. Shortage of paper can be detected based on the detection result of the paper end sensor 14.
The thermal printing head 2 is applied with a force toward the platen roller 3 by an elastic comportment and is contacted with the platen roller 3 through the paper P. The platen roller 3 is driven by a platen motor 32 (refer to
The cutter 4 is driven by a cutter motor 33 (refer to
The image forming apparatus A is also equipped with a conveying unit which comprises, along from the upstream side to the downstream side of the conveyance path L, a first feeding roller 5, a first pinch roller 6, a second feeding roller 7, a second pinch roller 8, a paper discharging sensor 12 and a housing 13 of the image forming apparatus on which a paper discharge port 13A is formed.
The first feeding roller 5 and the second feeding roller 7 are driven by a feeding motor 34 (refer to
As shown in
A press pad 9 is arranged nearby the second feeding roller 7 and the second pinch roller 8. A rack component 9A having linear gears on one surface thereof is provided below the press pad 9. The linear gears of the rack component 9A are meshed with a pinion 10 driven by a press pad motor 35 (refer to
The electrical components of the image forming apparatus (or the paper discharging apparatus in case that the thermal printing head 2 is not provided) described in this embodiment comprises, as shown in
In addition to the CPU 21 and the drivers 25-30, the interface 24 is further connected with an external host computer H, the paper end sensor 14, the paper discharging sensor 12 and the press pad sensor 11.
The driver 25 is connected with the thermal printing head 2. The driver 26 is connected with the platen motor 32 which rotates the platen roller 3. The driver 27 is connected with the cutter motor 33 which rotates clockwise and anticlockwise to drive the cutter 4. The driver 28 is connected with the feeding motor 34 which is rotatable clockwise and anticlockwise to rotate the first feeding roller 5 and the second feeding roller 7. The driver 29 is connected with a press pad motor 35 which is rotatable clockwise and anticlockwise to rotate the pinion 10, and the driver 30 is connected with the display 36 on which various operation information and management information can be displayed.
The drivers 25-30 control the thermal printing head 31, the platen motor 32, the cutter motor 33, the feeding motor 34, the press pad motor 35 and the display 36, respectively.
An operation effect of the press pad 9 when the pad 9 goes up and down is explained below.
As shown in
As shown in
The press pad 9 has an elongated hole 9D, into which the transmission shaft 7B is inserted to prevent the transmission shaft 7B from interfering the elevation of the press pad 9.
The upper surface 9C of the press pad 9 is not contacted with the pinch roller 8 when the press pad 9 is at the standby position. On the contrary, when the press pad 9 is lifted from the standby position by the rack component 9A and the pinion 10, the upper surface 9C is contacted with the pinch roller 8, and the upper surface 9C presses the pinch roller 8 when the press pad 9 is further lifted, as shown in
(Operation)
Operations implemented by the image forming apparatus A having the structure above are described in detail below with reference to the sectional views of
The paper P taken from the rolled paper 1 is conveyed to the conveyance path L under the control of the control unit 20, and the feeding motor 34 is rotated clockwise at a speed equal to the printing speed of the thermal printing head 2, that is, a speed of the platen motor 32 (Act S1). In this way, the first feeding roller 5 and the second feeding roller 7 rotate at the same speed with the platen roller 3.
The control unit 20 drives the thermal printing head 2 to print, for example, one line (one content line) on the paper P (Act S2). The paper P is fed forward by one line after one line is printed (Act S3).
The control unit 20 determines whether or not the front end of the paper P is detected by the paper discharging sensor 12 (Act S4). If the paper discharging sensor 12 does not detect the front end of the paper P (Act S4: No), the control unit 20 determines whether or not print of N (N is a natural number) lines are completed (Act S5). It should be noted that N refers to the number of total print-lines for the print job of the current processed subject.
If N lines are not all printed (Act S5: No), the control unit 20 drives the thermal printing head 2 to print, for example, one line, on the paper P (Act S6), and feeds the paper P forward by an amount corresponding to the one line after the line is printed (Act S7), and then returns to execute Act S4.
The paper P is conveyed to the discharge port 13A along the conveyance path L while Acts S4-S7 are carried out repeatedly, as shown in
After Acts S8-S10 are executed, the second pinch roller 8 is lifted by the press pad 9 and is separated from the second feeding roller 7, as shown in
When Acts S4-S7 are executed repeatedly after the press pad 9 is lifted, the paper P is continuously conveyed to the discharge port 13A by the first feeding roller 5, but the paper P is bent as shown in
Especially, since the upper surface 9C of the press pad 9 is inclined in this embodiment, the paper P is curved along the inclined surface as the paper P is fed by the first feeding roller 5 and the first pinch roller 6, consequentially, the paper P is smoothly bent towards the opened part below the conveyance path L.
Thus, because of the paper P being bent, the paper P is not exposed to the outside from the discharge port 13A during printing.
Printing of N lines on the paper P is finished (Act S5: Yes) if Acts S4-S7 are executed repeatedly while the paper P is bent. At this time, the control unit 20 feeds the paper P by a required length M (M is a natural number) using the paper-pressing roller 3 and the first feeding roller 5 (Act S11) and stops the platen motor 32 and the feeding motor 34 (Act S12). In addition, the control unit 20 rotates the cutter motor 33 clockwise to drive the cutter 4 and thus the paper P is cut off (Act S13).
Explanation of the operation is continued referring to the flow chart in
After Acts S14-516 are executed, the second pinch roller 8 returns to the original position, and the paper P is clamped by the second feeding roller 7 and the second pinch roller 8, as shown in
The control unit 20 stops the feeding motor 34 (Act S19) after the paper P is fed forward by N-X lines (Act S18: Yes). Then, the second feeding roller 7 stops rotating, and the discharging of the paper P is completed. At this time, as shown in
Explanation of the operation is further continued referring to the flow chart in
On the other hand, if the paper P is detected by the paper discharging sensor 12 (Act S21: Yes), then the control unit 20 withdraws the paper P into the housing. That is, the control unit 20 rotates the feeding motor 34 anticlockwise (Act S22) and waits for the paper discharging sensor 12 to detect the front end of the paper P (Act S23). At this time, as shown in
If the front end of the paper P is detected by the paper discharging sensor 12 (Act S23: Yes), then the control unit 20 waits for a period of time required that the front end of the paper P fully passes the position where the second feeding roller 8 is contacted with the second pinch roller 8 (Act S24) and stops the feeding motor 34 (Act S25) if the required period of time passes (Act S24: Yes). Then, the withdrawal of the paper P is ended, and as shown in
The image forming apparatus (paper discharging apparatus) A according to this embodiment moves the upper surface 9C of the press pad 9 to the separate position to separate the second feeding roller 7 from the second pinch roller 8, and thus the paper P is clamped between the second pinch roller 8 and the upper surface 9C of the press pad 9. Under this state, the paper P is further conveyed by the first feed roller 5 and the first pinch roller 6 so as to curve the paper P. After that, the upper surface 9C of the press pad 9 is moved to the standby position so that the paper P is clamped by the second feeding roller 7 and the second pinch roller 8, and then the paper P is discharged from the conveyance path L by the rotation of the second feeding roller 7 while the paper P is clamped.
According to this structure, the timing for discharging the printed paper P from the discharge port 13A can be adjusted. Thus, as described in this embodiment, the press pad 9 is moved to and located at the separate position until the printing is completed and then returned to the standby position after the printing is completed. By the operation described, the paper P is not exposed from the discharge port 13A prior to the completion of the printing and thereby preventing the paper P from being taken away by the user while the paper P is being printed.
Since the upper surface 9C of the press pad 9 is inclined with respect to the paper P conveying direction of the first feeding roller 5 and the first pinch roller 6, the paper P can be bent smoothly.
Even the paper P discharged from but left at the discharge port 13A can be automatically collected into the housing after a given period of time passes. Therefore, the user is not required to collect the paper P left at the discharge port 13A, manually.
Since the paper P is collected through the anticlockwise rotation of the feeding motor 34, there is no need to arrange a specific mechanism.
Apart from those mentioned above, the apparatus described above may achieve other appropriate effects.
[Modifications]
The apparatus disclosed in this embodiment may be embodied by modifying the structural components appropriately when in application. There exist, for example, the following specific modifications:
(1) In the embodiment above, the press pad 9 is exemplarily moved by the rack component 9A and the r pinion 10; however, the press pad 9 may also be moved by other mechanisms, for instance, the press pad 9 may be moved by a cam mechanism between the standby position and the separate position.
(2) In the structure described in the embodiment above, even clamped by the second pinch roller 8 and the upper surface 9C, there is a possibility that the paper P may be fed to the downstream side as the second pinch roller 8 may be rotated by the conveying force of the first feeding roller 5. The coping measure is to rough the surface of the second pinch roller 8 and the upper surface 9C of the press pad 9, as shown in
(3) In addition, the opened part of the conveyance path L arranged between the first feeding roller 5 and the first pinch roller 6 as well as between the second feeding roller 7 and the second pinch roller 8 may also be formed in open-close manner.
If the image forming apparatus is structured like this, the flapper motor is rotated clockwise when the press pad 9 is lifted to the separate position, for example, in Acts S8-S10 until the flapper 100 is fully opened. When the flapper 100 is rotated clockwise to the position indicated by the dotted lines shown in
As a result, the space of the conveyance path L is enlarged when necessary, and the paper P is conveyed smoothly when there is no need to bend the paper P.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
Number | Date | Country | Kind |
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2011-153169 | Jul 2011 | JP | national |
This application is a Division of application Ser. No. 14/557,702 filed Dec. 2, 2014, which is a Division of application Ser. No. 13/539,723 filed Jul. 2, 2012, the entire contents of both of which are incorporated herein by reference. This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2011-153169, filed Jul. 11, 2011, the entire contents of which are incorporated herein by reference.
Number | Date | Country | |
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Parent | 14557702 | Dec 2014 | US |
Child | 15206397 | US | |
Parent | 13539723 | Jul 2012 | US |
Child | 14557702 | US |