JPH0399870A - Printer system having paper feeding device - Google Patents

Abstract

PURPOSE:To feed a single-sheet paper to a platen means by turning 'ON' a paper feeding and delivering switch means when the 'presence' of paper is detected with a paper detecting means and the feeding of the single-sheet paper is selected with a selecting means. CONSTITUTION:Input for a paper feeding switch switch is performed under the state wherein an operating lever is located at a single-sheet paper feeding position and a paper-presence detecting switch is changed from the no-paper state to the paper-presence state. Then, a driving motor 28 is rotted forward by steps of a specified amount N1. The tip of the single-sheet paper S1 is sent to a head lead-out position 42a at the upper side of a printing position 41, and the paper is stopped. Thus the setting of the single-sheet paper S1 is finished. When printing and the like progress after the finish and the paper- presence detecting switch 34 detects the terminating end of the single-sheet paper S1, the waiting state for the insertion of recording paper is set again. The switching of a paper feeding unit 10 and a driving-wheel train 20 by an operating lever 1 is completed. The continued setting of continuous paper S2 is performed by the operation of the feeding switch SW as in the case for setting the single-sheet paper S1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a blink system having a paper feeding device capable of feeding continuous paper such as fanfold paper and cut paper such as cut paper.

[Prior art 1] Some printers, which serve as computer output devices, can use continuous paper such as fanfold paper and single-sheet paper such as cut paper. Feed force is applied to the cut paper by a bushing tractor disposed on the side, or by rotation of the platen itself in the case of cut sheets.

The device disclosed in Japanese Utility Model Application Publication No. 60-145052 is
In order to more effectively feed each recording paper, two stages of nipping rollers are installed at the bottom of the platen, and when using fanfold paper, the roller on the side far from the print head is first moved. The trailing roller that introduced the paper edge by pressing against the platen should be moved away from the platen, and when using cut paper, switch to the state where only the roller of the print head fil+ is pressed against the platen. This is what I did.

This device has the advantage that it is easy to load paper when using fanfold paper because the roller on the side away from the print head is in pressure contact with the platen. Even if the recording paper S is guided by this roller a and the guide plate and fed to the circumferential surface of the platen C,
In order to further wrap the paper around the circumferential surface of the platen C, it is necessary to forcibly align the paper guide auxiliary plate d along the circumferential surface of the platen C as shown in FIG. As shown in Figure 3, the hit recording paper S sagged unstably between the roller a and the auxiliary plate d, and in particular, the circumferential speed of the platen C was set higher than the feed speed of the push truck e. In printers, this slack is gradually absorbed during paper feeding, causing inconveniences such as misalignment of the printing position by the amount of slack, and in the case of cut paper feeding. There is also the problem that sufficient feeding action cannot be achieved by suppressing only the roller on the print head side.

Further, a paper feeding device capable of selectively switching between feeding continuous paper and feeding single-cut paper and feeding each paper in one printer is described in Japanese Patent Application Laid-Open No. 57-205182. . By changing the switching λ position of the switching lever, this device cuts off the rotation of the motor to the bin tractor when using single sheets, allowing you to transfer single sheets in pairs without removing the continuous sheet from the bin tractor. It is possible to feed the paper using a pull-out roller. Therefore, the feeding of continuous paper and cut paper is switched based on the operation of only the switching lever, which not only complicates the mechanism but also requires a person to change the position of the switching lever many times. Operation is complicated.

[Problem to be Solved by the Invention 1] The present invention has been made in order to further eliminate such inconveniences, and its purpose is to solve the problem without causing the paper to sag when using continuous paper. Also, when using slip paper, ensure reliable feeding.

Furthermore, it includes a selection means for selecting either the feeding of cut sheets or the feeding of continuous sheets, and a feeder for controlling the drive of the paper feeding means to feed and eject sheets of cut sheets and continuous sheets. - By cooperating with a paper ejection switch means, it is possible to ensure feeding switching between cut paper and continuous paper, and to provide a simple device that does not require troublesome operability.

[Means for Solving the Problems] A printer system having a paper feeding device of the present invention is a printer system capable of selectively supplying cut sheets and continuous sheets, and includes: a) a platen means disposed corresponding to a printing means; and b) a paper detection means provided on the paper feed path for the cut paper and continuous paper to detect the presence or absence of paper; and C) a paper detection means located near the platen means for detecting the presence or absence of paper for the cut paper and continuous paper. a means for feeding paper to a predetermined position; d) a selection means for selecting one of feeding the cut paper or feeding the continuous paper; and e) feeding the cut paper and the continuous paper. a paper feed/discharge switch means for driving the paper feed/discharge by the paper feeding means, and when the paper detection means detects that paper is present and the selection means selects the If feeding the form is selected,
By turning on the paper feed/ejection switch means,
[Embodiment] Figure 1.2 shows a paper feeding mechanism that is incorporated into the printer body and is a characteristic part of the present invention. Code 1 in a certain 6 diagrams
is an operating lever that displaces a paper feed unit 10, which will be described later, according to the recording paper S to be used, and this operating lever 1 is
In addition to the operation arm 2 exposed on the top surface of the printer main body (not shown) so that it can be operated by hand, there is also a unit displacement arm 3 that acts on and displaces the paper feed unit 10, and a drive for the bush tractor 25. Force transmission gear train 20
By pressing down the cam shape 5 that acts on the lever to move a part of the wheel train toward and away from each other, and the lever position detection SW 9 provided near the operating lever,
It is formed as a three-lever arm 4 having an SW pressing cam shape 7 for identifying position a and position or position C, which will be described later, and is rotatable on a shaft provided in the frame. is supported by.

On the other hand, the paper feeding unit 10 described above changes the feeding action of the recording paper S depending on the type of recording paper S or the paper feeding form. Both are integrally connected by a common shaft 12, and are rotated by an operating lever l that acts on a driven lever 11. That is, this driven lever 11 has three arcuate recessed portions 11a, 11b, llc at the sliding contact edge with the unit displacement arm 3 so that it can assume three swing positions under the suppressing action of the unit displacement arm 3. is provided, and a paper feed lever 13 that is integrated therewith is
At one end, an end on the print head 33 side and a print head 33
A front roller 15 and a rear roller 16 (111i^) are respectively held at the ends of the front roller 15 and the rear roller 16 (111i^) on the rear roller side of the roller holder 14 by a weak tension spring 17 attached to the paper feed lever 13. By pulling the driven lever 11, the second
As shown in Figure (a), the paper feed lever 13 rotates clockwise in the figure to press both rollers 15 and 16 against the surface of the platen 30, and the driven lever 11 rotates clockwise in the figure to press the rollers 15 and 16 against the platen 30 surface. Feed position, that is, unit displacement arm 3
At the position where the tip of the second recess 11b is engaged, the second
As shown in Figure (b), the paper feed lever 13 is rotated one step counterclockwise to move the roller holder 14 slightly away from the platen 30, and is rotated clockwise by the tension spring 17, so that the Further, the driven lever 1 is adjusted so that only the roller 15 is in weak contact with the platen 30 surface.
1 is the pull tractor feeding position of the continuous paper S2, that is, the position where the tip of the unit displacement arm 3 engages with the third recessed part 11c, the paper feeding lever 13 is further moved as shown in FIG. 2(C). By rotating counterclockwise, both rollers 15.1
6 are both configured to take a posture away from the platen 30.

On the other hand, reference numeral 21 denotes a first wheel which is located in the push tractor drive wheel train 20 and is movable in the axial direction while always maintaining meshing engagement with the pinion 23 of the drive morph 28.
One end of this shaft 22 of the intermediate wheel is in contact with the cammed arm 4 of the operating lever 1, and the cam surface 5 formed thereon allows the second intermediate wheel to 24, and when the operating lever l is in the continuous paper feed position (bush tractor feed position and pull tractor feed position), it is in the meshing position with the second intermediate wheel 24, and the drive motor The driving force of 28 is applied to the binion 23,
The power is transmitted to the bush tractor 25 via the second intermediate wheel 24 and a pinion 26 that meshes with the second intermediate wheel 24.

On the other hand, reference numeral 9 denotes a lever position detection SW provided near the operating lever 1. When the operating lever 1 is at the single sheet feeding position, it is in the cutoff state, and when the operating lever 1 is at the continuous paper feeding position. (bush tractor feed position and pull tractor feed position), the actuator 8 of the lever position detection SW 9 is activated by the cam shape 7 provided on the arm 4 of the operating lever 1.
When pressed, it becomes conductive, allowing identification of single sheet feeding or continuous sheet feeding.

In the drawing, reference numeral 18 indicates a stopper bin on the paper feeding unit 10, 31 indicates a guide plate, 32 indicates a paper guide auxiliary plate, and 34 indicates a paper presence detection switch provided on the path of the recording paper S. , the platen 30 is configured such that the driving force of the drive motor 28 is always transmitted by a transmission mechanism (not shown) regardless of the meshing of the first intermediate wheel 21 and the second intermediate wheel 24. As is well known, the pull tractor 27 shown behind the platen 30 in Figure (C) is configured to be able to pull the continuous paper S2 at the same speed as the bush tractor 25 via a transmission mechanism (not shown). Furthermore, on the top surface of the printer main body shown in FIG. 7, a SW (hereinafter referred to as paper feed 5W50) for sending a paper feed command signal for recording paper is configured.

In the device configured in this way, when writing is to be performed on a cut sheet S1 such as a cut sheet, first the operation lever l is rotated to position 9 shown in FIG. do.

As a result, the cammed arm 4 of the operating lever l is moved to the first position.
By positioning the intermediate wheel 21 at the lowest part of the cam surface 5, it is disengaged from the second intermediate wheel 24, and
The cam surface 7 does not act on the lever position detection SW9;
is held in a blocked state to recognize that the current state is the position for feeding the cut sheet. At the same time, the tip of the unit displacement arm 3 is positioned within the first opening 11a of the driven lever 11 to hold this lever 11 in the monograph feeding position. As shown in FIG. 2(a), the feed lever 13 pushes up the roller holder 14 with its one end, brings the front roller 15 and rear roller 16 which are pivotally supported at both ends into contact with the circumferential surface of the platen 30, and moves the platen. Single sheet S fed along 30
1 is brought into close contact with the circumferential surface of the platen 30 by both rollers 15 and 16 to ensure paper feeding by rotation of the platen 30 itself. ” The tip of the unit displacement arm 3 rotates counterclockwise while pressing the driven lever 11 to move the second quadruple 1
1b and further rotates the paper feed lever 13, which is integrated with this lever 11, counterclockwise to move the roller holder 14, which is pivotally supported at the tip thereof, a little away from the platen 30. As a result, the roller holder 14, whose rear roller 16 side is pulled by the weak tension spring 17, rotates slightly clockwise to bring the pivotally supported front roller 15 into light contact with the circumferential surface of the platen 30 (see Fig. 2(b). )), J On the other hand, if you want to use another recording paper after completing a series of printing operations, you must eject the cut paper S1 that has been printed up to now. Lever 1 is in the cut paper feed position,
The paper presence detection 5W34 recognizes that there is paper. Then, when the paper feed 5W50 is inputted again, the drive morph 28 is driven in normal rotation until the paper presence detection 5W34 detects the end of the cut paper S1. After that, it is further rotated in the forward direction by a predetermined amount N and a pulse, and the ejection of the cut sheet S1 is completed.
After that, it will wait for the recording paper to be inserted. (Fig. 6(b)) Next, when using continuous paper S2 such as fanfold paper, move the operating lever l to the second position, that is, the bush tractor feed position as shown in Fig. 1. rotate counterclockwise. (Fig. 4(b)) As a result, the arm with cam 4
The first intermediate axle 21 that was in contact with the lowest surface of the arm 4 is pushed up along the cam surface 5 of the arm 4 and meshes with the second intermediate wheel 24 to ensure the transmission of driving force to the bush tractor 25. At the same time, the cam surface 7 pushes down the actuator 8 of the lever position detection SW 9 to bring it into a conductive state, thereby recognizing that the current state is the continuous paper feeding position. Next, the cut paper S1 is set, and the cut paper S1 is set after printing is completed.
The ejection is performed by operating the paper feed 5W50 described above.

This is done according to the flowchart in FIG.

First, in a state where there is no paper, branches A and C maintain a state of waiting for the insertion of cut paper S1.

When the cut paper S1 is inserted in the direction of the arrow f, the leading edge of the paper comes into contact with the pressure contact point 40 between the platen 30 and the rear roller 16, and positioning is performed.At the same time, the paper presence detection 5W34 provided on the path of the cut paper S1 activates and recognizes that paper has been inserted. In other words, when the printer main body inputs the paper feed 5W50 in this state where the operation lever is in the cut paper feed position and the paper presence detection switch recognizes that it has changed from paper out to paper present, As shown in the flowchart of FIG. 6(a), the drive motor 28 is rotated forward by a predetermined step of ff1N, and the paper edge of the cut sheet S1 is moved from the position 40 to the upper part 42a of the printing position 41.
(hereinafter referred to as the cue position) and then stops. This completes the setting of the cut sheet Sl.

Thereafter, printing etc. proceed, and when the paper presence detection SW 34 detects the end of the cut paper S1, as shown in FIG. 5, the machine waits for insertion of recording paper again.

With the above steps, the switching of the paper feed unit 10 and the drive wheel train 20 by the operation lever 1 is completed, and the continuous paper S2
The setting of the paper sheet S is carried out in accordance with the flowchart of FIG. 6(C) by operating the paper feeder 5W50 in the same manner as the setting of the cut sheet S.

First, in the paper out state, that is, when the Bunonta main unit recognizes that the operating lever l is in the continuous paper feed position and the paper presence detection SW is in the paper out state, the paper feed is set to 5W50. When the input is performed, the drive motor 28 is driven to rotate in the normal direction, and the pinion 23, the first intermediate wheel 21 . It is driven via a second intermediate wheel 24 and a pinion 26. The continuous paper S2 pushed by the bush tractor 25 is sent out in the direction of arrow 9 while being guided by the guide plate 31. When the leading edge of the continuous paper S2 reaches position ff1F43, the paper presence detection 5W34 is activated and it is recognized that the continuous paper S has been inserted. From here, by further rotating the drive motor 28 in the forward pulse by a predetermined amount N, the leading edge of the continuous paper S2 is moved to the front roller 15.
The paper is fed to the circular surface of the platen 30 while being supported by the paper guide plate 32, and is further guided by the paper guide auxiliary plate 32 to reach the cue position 42b. This completes the setting of the continuous paper S2. That is,
The continuous paper S2 is fed along the guide plate 31.

Even if a part of the continuous paper S2 sag due to its stiffness, the front roller 15 on the side closer to the print head 33 lightly supports the continuous paper S2 and aligns it with the platen 30, so that everything from this point forward will be smooth. At a certain distance, the continuous paper S2 does not sag and subsequent printing is performed accurately.

After that, when the printing operation progresses and you want to change to another recording paper again, the printer body recognizes that the operation lever 1 is in the continuous paper feed position and that the paper presence detection 5W34 is in the paper presence state. Therefore, when the paper feed 5W50 input is performed again, the continuous paper S2 is retracted backwards this time.

First, the drive morph 28 is driven in reverse. Continuous paper S2 is pulled by bush tractor 25, and the leading edge of the paper is at position 43.
When reaching , the paper presence detection 5W34 detects the end of the continuous paper S2. From here, the drive motor is further reversed by a predetermined amount of N4 pulses, so that the leading edge of the continuous paper S2 can be inserted into the bushing tractor 25 without interfering with inserting the cut paper.
It is evacuated to a position 44 where it does not come off, and then stopped.

With this, the backward evacuation operation is completed, and the printer waits for recording paper to be inserted again.

Furthermore, when the continuous paper S2 is further fed by the bush tractor 25 and the pull tractor 27, the operating lever 1 is further rotated counterclockwise in the figure. As a result, the unit displacement arm 3 further rotates the paper feed lever 13 in the counterclockwise direction via the driven lever 11, moves the roller holder 14 held at one end away from the platen 30, and moves both rollers 15 and 16 out of the way. Make contact. For this reason,
The continuous paper S2 suspended by the bush tractor 27 and the pull tractor 26 is in light contact with the platen 30, and even if the platen 30 rotates at a faster circumferential speed than these tractors 25, 27, it will not be affected by this. Accurate paper feeding is ensured without any problems.

Note that the above-described embodiment is configured to be applicable to not only single-sheet paper feeding but also continuous paper feeding to two types of feed: bush tractor feed and pull tractor feed. is not particularly required, and the operating lever l can be replaced with another operating means that performs the same function, for example, the paper selection switch 51 as shown in FIG. .

[Effects of the Invention] As described above, according to the present invention, a roller holder having rollers on the side near the print head and on the side away from the print head is disposed near the platen, and the roller holder is mounted on both sides. Since the roller is in pressure contact with the platen, or only the roller on the print head side is in contact with the platen, in the case of single-sheet paper, both rollers press it against the platen. Not only can feeding be ensured, but in the case of continuous paper, by lightly pressing the side near the print head, it is possible to eliminate slack in the paper in front of it and enable accurate recording and writing.

In this case, switching between paper and paper feeding is performed by a selection means for selecting either feeding of cut sheets or feeding of continuous paper, and a paper feed/ejection switch means. Because of this, the switching operation is reliable, and the structure is simple and does not affect operability.

[Brief explanation of drawings]

FIGS. 1 and 2 (a), (b), and (c) are diagrams showing characteristic parts of a paper feeding device showing an embodiment of the present invention. FIG. 3 is a diagram showing a conventional paper feeding mechanism. Figures 4(a), (b), and (c3) are diagrams showing the operating positions of the operating levers in the present invention. FIG. 7 and FIG. 8 are diagrams illustrating the paper feed switch in the present invention.

Claims (1)

[Claims] (1) In a printer system that can selectively supply cut paper and continuous paper, a) a platen means arranged corresponding to the printing means, and b) a platen means arranged on the paper feed path for the cut paper and continuous paper. c) paper feeding means located near the platen means and feeding the cut paper and continuous paper to predetermined positions; d) paper detection means for detecting the presence or absence of paper; e) a selection means for selecting one of paper feeding and feeding of the continuous paper; e) feeding and ejection means for driving the feeding and ejection of the cut paper and the continuous paper by the paper feeding means; a paper switch means, the paper detecting means detects that paper is present, and
When feeding of the cut paper is selected by the selection means, the cut paper is fed to the platen means by turning on the feed/discharge switch means. Printer system with paper device