JPS61220874A - Automatic paper-supplying system for recorder - Google Patents

Abstract

PURPOSE:To provide an automatic paper-supplying system for a recorder which can be constructed in a small size and inexpensively, by a construction wherein an automatic paper-supplying device comprises a paper-supplying cassette and a paper- supplying roller, and a recording is provided with a discharging roller for a paper enclosed in a cassette. CONSTITUTION:Each combined paper-supplying roller and paper support 19 is fitted over an angular shaft part of a tractor shaft 16, can be freely moved in the axial direction, and is rotated together with the shaft 16. The roller 19 has a surface formed of a material having a high coefficient of friction, and the outer peripheral surface thereof is provided with rugged patterns with a predetermined pitch for discharging the paper. The paper-supplying roller 65 is fixed to a paper-supplying roller shaft 66, is formed of a material having a high coefficient of friction, while the shaft 66 is rotatably supported on an upper cover 64 through a shaft, and a paper-supplying gear 67 is fixed to an end part of the shaft 66. The gear 67 can be engaged with an idle gear 7 under the condition where the paper-supplying cassette is mounted onto a mount plate 58 of a printer. Accordingly, since the cassette provided with the paper-supplying roller is detachably fitted to the recorder provided with the paper- discharging roller, the automatic paper-supplying system can be achieved with an extremely overall size and at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an automatic paper feeding system for a recording device, which includes a recording device and an automatic paper feeding device that is detachably attached to the recording device.

(Conventional Example) Generally, an automatic paper feeder that is attached to and detached from a recording apparatus includes a paper feed tray, a paper ejection tray, a paper feed roller, a paper ejection roller, and the like. Some large-sized rollers also have a microprocessor to control each roller and a motor as a power source. However, such a paper feeding device inevitably becomes large and extremely expensive, and when viewed as a system including the recording device, the entire system becomes large and expensive.

(Objective) The present invention eliminates the above-mentioned drawbacks, and aims to provide an automatic paper feeding system for a recording apparatus that can be constructed in a small size and at low cost.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show mechanical configurations of embodiments of the present invention,
1 is a platen formed into a cylindrical shape.

It is fixed to the platen shaft 2. The platen shaft 2 is rotatably supported between side plates (not shown), and a paper feed motor 3 is coupled to one end.

A platen gear 4 is fixed to the platen shaft 2.

Reference numeral 5 denotes an L-shaped rocking plate, which is rotatably supported by the platen shaft 2 with a moderate amount of friction, and one of the arms has shafts A to idle gear 6 which mesh with the platen gear 4 through shafts 8 and 9. ．． Further, a B-'lx idle gear 7 which meshes with the A-A idle gear 6 is rotatably supported. Further, the other arm portion 5a of the diaphragm 5 is provided with a hook portion 1 of a lock lever 10 in order to restrict rotation of the oscillating plate 5 in the counterclockwise direction (anti-A direction).
0a is engaged, and a stopper pin 11 protruding from a side plate (not shown) is in contact with the opposite surface of the arm portion 5a, so that the platen shaft 2 is normally rotated in the forward direction (direction A) and in the opposite direction (anti-A direction). The rocking plate 5 does not rotate no matter which direction it rotates.

The lock lever 10 is rotatably supported by a lock lever shaft 12, and is biased by a lock lever spring 13 in a direction into which it engages with the swing plate 5. 14.15 is a tractor lever, which is rotatably supported on the Plato shaft 2, and at the other end,
A tractor shaft 16 is rotatably supported. The tractor shaft 16 has a circular cross section at both ends so as to be rotatable, and a square shaft at the middle part to enable transmission of power. A tractor gear 17 is fixed to the tractor shaft 16, and meshes with a tractor lever 14.15 (rotatably supported on a side plate of the machine that constantly meshes with the platen gear 4). Reference numeral 19 is a paper ejection roller and paper receiver. It is inserted into the square shaft portion of the tractor shaft 16, can move freely in the axial direction, and rotates together with the tractor shaft 16. The paper ejection roller 19 is made of a material with a high surface friction coefficient such as rubber, and its outer peripheral surface is provided with irregularities at a predetermined pitch for paper ejection.

Reference numeral 20 denotes a pin wheel constituting the tractor, which is rotatably held by the tractor guide 21 and slidably inserted into the square shaft portion of the tractor shaft 16. 22 is a tractor which can be opened and closed around a hinge pin 23. 24 is a tractor guide rotation stopper shaft, and a guide plate 25
．． 26 to stop the tractor guide 21 from rotating about the shaft 16. The guide plates 25 and 26 are rotatably supported on the tractor shaft 16.

A front guide shaft 27 is supported between side plates (not shown). 28 is a rear guide shaft, which is also supported between side plates (not shown). 29 is a carrier, and the front guide shaft 27
．． It is slidably supported by a rear guide shaft 28, and a print head 30 and an ink ribbon cassette 31 are mounted on the upper part. The ink ribbon cassette 31 stores an ink ribbon 32 having four layers of color bands in the width direction, and the hinge portion 31a is rotatably supported by the arm 29a of the carrier 29, so that the tip of the print head 30 It is possible to change the usage position of the ribbon 32 in the vertical direction. Here, as shown in FIG. 2, near the printing part of the ink ribbon cassette 31, rack teeth 31b, 31c, 31d are provided for switching the ribbon cassette according to the ribbon color.
, 31e, and a projection 31f that is pushed up by a switching arm, which will be described later.

A control rail 33 is attached to the yoke 34. A conical cam surface 35a having an end portion 35b is provided at the tip of the plunger 35 of the control lens 33.

Reference numeral 36 denotes a switching arm, which includes a switching pin 36a that engages with a cam plate to be described later, a pressing end 38b that comes into contact with the protrusion 31f of the ribbon cassette 31 mentioned above, a holder 36c that comes into contact with the plunger end 35b of the control solenoid 33 mentioned above, and a yoke. It is rotatably supported on an arm shaft 37 fixed to 34. 38 is a switching arm spring, and arm shaft 37
is inserted into the switching arm 36, and the other end is inserted into the carrier 2.
9 is fixed to the book part (not shown), and the switching arm 36
is always urged in the direction of being pressed against the arm stopper 39. The arm stopper 39 is provided to protrude from the yoke 34. Further, the switching arm spring 38 uses its coil portion to constantly press the switching arm 36 against the plunger one end 35b.

A cassette lock lever 40 is rotatably supported on the arm shaft 37, and one end 40a is connected to the rack teeth 3 of the ribbon cassette.
It is constantly urged by a spring 41 in the direction of engagement with 1bNe. The other end of the cassette lock lever 40 is in contact with the tip 35b of the conical cam surface 35a of the plunger 35, and when the control solenoid 33 is energized and the plunger 35 is sucked to cause the plunger end 35b to protrude,
By the conical cam surface 35a.

The cassette lock lever 40 has a tip 40a.

It can be rotated in the direction of separation (direction B) by the rack teeth 31b-e and released from the rack teeth. Also, press the switching arm 36 at the same time.

The switching pin 36a is fixed at a position where it engages with a cam plate 47, which will be described later. 42 is a screw that fixes the yoke 34 to a predetermined position on the carrier 29.

Again in FIG. 1, reference numeral 43 denotes a tension pulley, which is rotatably supported by a pulley shaft 44 protruding from the bottom plate of the printer (not shown). 45 is a carrier drive motor, which is a stepper motor that rotates in synchronization with a predetermined pulse. A timing belt 46 is stretched between the tension pulley 43 and a motor pulley (not shown), and one end is fixed to the lower part of the carrier 29. According to the rotation angle of the carrier motor 45, the carrier 29 is rotated by a predetermined amount. It can be moved in the digit direction (guide axis direction).

47 is the aforementioned cam plate, which has a pilot hole 47a that can be moved in the digit direction, and this long hole 47a is moved by a slide shaft 48;
They are supported so that they do not fall through. The slide shaft 48 is fixed to the bottom plate of the printer (not shown).

The cam plate 47 includes a ribbon switching cam 47b, a cam portion 47c for rotating the left side paper bail arm 50-1 mentioned above, and a cam section 47c for rotating the above-mentioned lock lever 1O, and a right side paper bail arm 50-1 for rotating the above-mentioned lock lever 1O. It has a cam part 47d for rotating 2, and also has an engaging part 47f. Furthermore, the cam plate 47 is integrally provided with a stopper plate 4.
7e is provided, and is pulled in the C direction by a return spring 49.

Reference numerals 50-1 and 50-2 are the paper bail arms described above, which are rotatably supported at a predetermined position on the front guide shaft 27, respectively.

The arm 5O contacts the cam portions 47c and 47d of the cam plate 47.
-1a, 5O-2a, and rotation stops 5O-1b, 5O-2 whose rotation is regulated by coming into contact with the left and right stopper plates 47e.
It has b.

A paper cutter 51 is fixed to the tips of the other arms 5O-1c and 5O-2c of each paper bail arm, and a scale 51a indicating the printing position is engraved on the front surface of the paper cutter.

A slider 52 is slidably fitted to the cutter 51 with a predetermined frictional force, and rotatably holds the bail roller 53 as shown in FIG. The slider 52 is made of a resilient material such as plastic.
The bail roller 53, which is held between the paper bail arms 50-1 and 50-2 in a manner of 0 or more, generates a fitting pressure against the cutter 51 and prevents the bail roller 53 from hitting unevenly. -2 is pressed against the platen 1 by being biased clockwise by the spring SP. 54 is a paper pan for guiding the printing paper.
It is fixed to a side plate (not shown).

Pinch rollers 55a and 55b are provided at positions facing the platen 1, and are pressed with a predetermined pressure by springs (not shown).

Reference numeral 56 denotes a cutter cover, which is rotatably supported by the exterior case of the printer, and when the above-mentioned paper ejection roller 19 is located above, it is biased by a spring (not shown) to press the surface of the cutter cover and release the recording paper onto the paper ejection roller 19. It has the function of imposing.

In FIG. 1, reference numeral 57 denotes a paper feed cassette detection switch provided on the mounting plate 58, and the switch is turned on when a paper feed cassette, which will be described later, is attached.

58 is a mounting plate provided below the bin wheel 20;
It has a groove 58a for positioning the paper feed cassette and is fixed to a bottom plate (not shown). Reference numeral 59 denotes a paper fish detection switch composed of a reflective photointerrupter, which is fixed to a bottom plate (not shown).

FIG. 3 shows a paper feed cassette, and in the figure, 60 is a cassette case for storing a plurality of cut sheets 61, and an upper lid 64, which will be described later, is held by a hinge portion Bob, 60b so as to be openable and closable in the D direction. There is. The cassette case 60 also has a hook portion 60 that engages with a lock claw 64a of the upper cover 64.
a, and the groove 58a of the printer mounting plate 58.

Claw portions 60c, 60c, which fit into 58a, are provided protruding from both sides, respectively. Further, as shown in FIG. 4, the cassette case 60 includes a push plate 62 for lifting the cut paper upward and pressing it against a paper feed roller 65, which will be described later, and a spring 68 for applying pressure to the push plate 62. Separation claws 63 for separating the sheets one by one are attached to both ends.

As described above, the upper lid 64 is rotatably attached to the hinge portion 60b of the cassette case 60, but normally the hook portion 60a is engaged with the lock claw 64a to prevent it from opening. 65 is a paper feed roller and the paper feed roller shaft 6
6, and is rotatably supported by a shape 64 made of a material with a high friction coefficient such as rubber, and a paper feed tray 67 is fixed to the end.

This paper feed gear 67 is in the position shown in FIG. 9 (IL) when the paper feed cassette is attached to the mounting plate 58 of the printer, and can mesh with the B-eye and Lugia 7.

FIG. 5 shows the electrical configuration of the printer of this embodiment. Print data and command data are input into the printer from a host computer connected via an interface unit 70, and are temporarily stored in a RAM 72 via a central processing circuit (hereinafter referred to as CPU) 71. Roughly speaking, the CPU 71 sequentially reads data stored in the RAM 72 according to print commands, and reads out the data stored in the RAM 72 in accordance with the program stored in the ROM 73.
4. Head driver 75. By operating the ribbon driver 76 and platen driver 77, the carrier motor 45,
The head 30, the ink ribbon feed motor 78, and the paper feed motor 3 are driven and controlled to print on the paper on the platen l. Here, the CPU 71 uses keys including the line feed key, online key, autoloading key 79, etc. An operating section 80 and a detection section 81 that detects the position of the carrier 29 in the digit direction. Signals from the paper fish switch 59 and the cassette detection switch 57 are also constantly monitored, and optimal printing control is executed based on the detection signals from each part.

Furthermore, in this embodiment, the driver 82 and the control solenoid 33 are operated to shift the ink ribbon cassette 31 in the vertical direction to enable multicolor printing. A memory area 83 is provided in the RAM 72 to store information on whether to perform the following. RAM7
In addition to this, many memory areas necessary for printing control are formed in the printer 2.

In this embodiment, it is possible to select whether the fan-hold paper feed tractor is used to feed paper in a push-type manner or in a pull-type manner, and auto-loading (
In addition to the automatic paper loading function, automatic paper feeding operation for cut sheets can also be performed by installing a paper feeding cassette.The correlation diagrams in Figs. 6 to 9 and 9. 1
This will be explained using the timing chart in FIG. 0 and the flowchart in FIG.

Push-in method> When using the tractor with the normal fan-hold paper push-in method, as shown in Figure 8 (&), insert the tractor guide 2.
1 is set behind the platen 1 and fixed at a predetermined position by a positioning member such as a click plate (not shown).

At this time, the tractor gear 17 is engaged with the B idle gear 7, and the forward rotation (arrow a) of the platen l given by the paper feed motor 3 is transmitted in the direction of the arrow d through the A idle gear 6 and the B idle gear 7. Rotate to . fan hold paper 6
1 is sent on the upper surface of the pin wheel 20, wraps around the pline 1, and is discharged upward.

The advantage of this pushing method is that there is no need to pull the paper that has passed through the platen to the tractor as in the pulling method, so the paper can be cut immediately after passing the platen, eliminating the waste of one sheet of paper. In the embodiment, a paper cutter is provided at approximately the same position as the bail roller 53, thereby eliminating wasteful use of paper as much as possible.

Tension method> When using the tension method, the track shaft 16 is lifted above the platen l and fixed at a predetermined position shown in FIG. 8(b) by a positioning member (not shown). At this time, the tractor gear 17 meshes with the C idle gear 18, and the direction of one rotation is the same as the platen 1, which is the f direction. The fan-hold paper 61 inserted from the rear of the printer is wound around the platen 1 and then passed through the upper surface of the pinwheel 20 and discharged backward.

In both cases of pushing and pulling as described above, the swing plate 5 is stopped from making one rotation by the hook portion 10a of the lock lever 10 and the stopper 11.

Autoloading> When autoloading paper, the operator loads cut paper 61-1 from behind the platen onto platen 1.
and the pinch roller 55a, and press the autoloading key 79. FIG. 10 shows the timing of the operations of each part during this autoloading operation.

Move it in the Y direction (Fig. 1) and set it to the home position (90
) L, then moved in the X direction and stopped between the cam portion 47b and the engaging portion 47f of the cam plate 47 (91).Here, the control solenoid 33 is energized (92), and the plunger 35 is activated. When it is sucked, the cassette lock lever 40 is disengaged from the rack teeth 31b-e of the ribbon cassette 31 as described above, and the ribbon cassette 31 falls to the lowest position due to its own weight and a spring (not shown) (94).
Further, the switching arm 36 is pushed by the tip 35b of the plunger 35 and pushed out toward the platen along the shaft 37 against the arm spring 38. Therefore, carrier 2
When 9 is further moved in the X direction, the switching pin 36a of the switching arm 36 and the engaging portion 47f of the cam plate 47 come into contact with each other.
In synchronization with the movement of the carrier 29, the cam plate 47 also moves in the X direction. As the cam plate 47 moves, the stopper plates 47e and 47e also move, disengaging the paper bail arm from rotation stops 5O-1b and 5O-2b, and allowing the paper bail arm to rotate. The carrier 29 stops moving near the center of the printing range (95).

Also, as the cam plate 47 moves, the cam portions 47c, 47
arm 5 of paper bale arm 50-1.50-2 at d
Push up O-1a and 5O-2a and paper bail arm 50-1.

50-2 is rotated in a direction away from the platen 1. At the stop position of the carrier 29, the cutter 51 and the paper bail roller 53 are fixed at a position sufficiently distant from the platen 1 (see Fig. 4), and the platen 1 is now rotated forward (in the direction A in Fig. 1). (96), Feed the paper by a predetermined amount while sandwiching the cut paper 61-1 between the platen 1 and the pinch roller 55a. At this time, the paper detection switch 59 provided at the bottom of the platen detects the leading edge of the paper. Then, the platen 1 is further rotated by a predetermined amount and at a position where the leading edge of the paper is slightly above the cutter 51, the rotation of the platen 1 is stopped.

When the carrier 29 is returned to the Y direction, the cam plate 47 follows the carrier 29 and returns due to the return spring 49, so the cutter 51 and paper bail roller 53, which were away from the platen l, also come into contact with the cut paper 5t-i, and the platen Press 1.

When the carrier 29 is further moved in the Y direction, the cam plate 47
The elongated hole 47a comes into contact with the slide shaft 48 and stops (9
7), when the carrier 29 is further moved in the Y direction, the switching bin 36a of the switching arm 36 and the ribbon switching cam 47
b abuts, and in proportion to the amount of movement of the carrier 29, the switching arm 36 moves to the second y! J rotates clockwise, and the pressing end 36b touches the protrusion 3 of the ribbon cassette 31.
Push up 1f to change the printing position of the ribbon 32.

The desired color band is one of the rack teeth 31b to 31e,
By engaging with the cassette lock lever tip 40a, it is stopped at the printing position.

Further, the desired engagement between the rack teeth and the lock lever is determined by the amount of movement of the carrier 29 (98), and is fixed in that state by turning off the control solenoid 33 (99), and the ribbon cassette l is held in that position. Retained. When the control solenoid 33 is de-energized, the switching arm 36 is rotated about the shaft 37 by the switching arm spring 38, further retreated in the thrust direction of the shaft 37, and the contact with the cam plate 47 is released.

When it is not necessary to switch the ribbon cassette 31 after auto-paper setting, the control solenoid 33 may be de-energized during the return process of the carrier 29 from the center position (95) to the home position.

As a result, even if the carrier 29 moves back, it does not engage, so the ribbon force set 31 remains stationary, and the color band of the top layer of the ink ribbon always faces the print position, which is the front of the print head. ing. The most efficient printing is achieved by distributing black in the color band of the top layer and yellow and cyan magenta in the other three layers.

Automatic paper feeding> Next, to explain the automatic paper feeding operation, as shown in FIG. do. As a result, the paper feed cassette detection switch 57 is turned on, and the attachment of the paper feed cassette is electrically confirmed.

FIG. 11 shows the timing of the operation of each part during automatic paper feeding, and the paper feeding cassette detection switch 57 is ON/OFF.
, when the autoloading key 79 is pressed, the CPU 71 determines that the automatic paper feed signal has expired and starts the automatic paper feed operation described below. still.

The signal for starting this automatic paper feeding operation is also input from the host computer connected via the interface section 70, and is especially given from the computer when a new cut sheet is loaded in order to continue printing during a printing operation. .

When the automatic paper feed signal is input, the cut paper 61-
The carrier 29 returns to the home position in the same way as during the autoloading operation in step 1. Also, in response to the automatic paper feed signal, the platen l starts normal rotation (direction A in Fig. 1) (93), and the paper crow arm moves toward the platen. It continues to rotate until just before it leaves the 1st place. As a result, the paper on the platen is completely ejected to the outside.

The cut paper 61 discharged to the outside by the platen 1 is
As shown in Figure IJ7, the paper is sandwiched between the paper ejection roller 19 set above the platen and the inner cover 56 with a moderate frictional force.

The sheet is further fed upward and stored in the stocker 68 by the surface protrusion of the sheet discharge roller 19.

The stocker 68 is rotatably attached to the outer case of the printer so as not to create a jam when feeding the fan-hold paper.

Further, the rotation of this paper ejection roller 19 is controlled by gear train 4.18.1.
7, and is the same rotation in the F direction as the rotation of the platen l. Furthermore, the paper feed speed of the paper discharge roller 19 is set to be equal to or slightly faster than that of the platen 1, so that the cut paper is reliably delivered to the stocker 68.
It is designed to be discharged.

Further, a trigger for starting rotation of the platen l in the forward direction for paper ejection during the printing operation is given by the print line counter provided in the RAM 72 described above. That is,
When the printing of the last line of cut paper is completed, the CPU 71
starts the forward rotation of the platen 1, and the cut paper 61
-1 is rotated by a predetermined amount sufficient to be discharged into the stocker 68.

Next, while the carrier 29 is moving from the home position in the X direction, the cam plate 47 also moves to the aforementioned switching pin 36a.
The cam portion 47d of the cam plate 47 moves in the X direction due to the engagement with the bare portion 47f, but at this time, the cam portion 47d of the cam plate 47
The lock lever 10 and the rocking plate 5 are disengaged by pushing up the portion tab. Therefore, at this point, move the platen in the opposite direction (
When the rocking plate 5 rotates in the center direction (FIG. 9(a)) (100), the rocking plate 5 rotates in the same direction due to the friction with the platen shaft 2, and the B idle gear 7 and paper feed gear 67 mesh with each other to feed the paper. The paper gear 67 rotates in the E direction.

FIG. 144 shows the platen 1 so that the paper feed roller 65 rotates in the direction E by a predetermined amount, and the uppermost cut paper 61-1 stored in the paper feed cassette is pulled out by the separating claw 63 to form a predetermined loop. This shows the state in which the paper is sent out between the pinch rollers 55a and

Incidentally, the platen 1 against which the cut paper collides is rotated in the D direction, which is preferable for forming a proper loop.

After this reverse rotation, the carrier 29 is stopped at the center and the platen 1 is rotated forward (rotation in the A direction) by a predetermined amount (the amount by which the cut paper is fed to the printing start position), as in the autoloading of the cut paper described above. ) (101), and the carrier 29 enters the return operation. When platen l rotates forward.

The swing plate 5 comes into contact with the stopper pin 11 and stops, and when the cam plate 47 returns with the return of the carrier 29, the lock lever 10 engages with the swing plate 5. is fixed at the position shown in FIG. 9(b).

As the paper feed gear 67 is disengaged from the B idle gear 7 by the forward rotation of the platen as described above, it becomes free, and even if the cut paper 61 is fed by the platen 1 during the subsequent printing operation, it will not synchronize with the paper. It can be rotated.

By repeating the above-described paper feeding and discharging operations, cut sheets are automatically fed and discharged continuously, but it is also possible to always perform the paper discharging operation before performing the paper feeding operation.

FIG. 12 is a flowchart showing automatic loading or automatic sheet feeding/discharging operation. When the autoloading key 79 is turned on in Stella 7'S1, step S
In step 2, the color band to be printed next is stored in the memory area 53 in the RAM 72.

After that, in step S3, the carrier 29 is returned to the home position, and then moved again in the X direction in FIG.
In step 4, it is detected whether or not a paper feed cassette is installed. When the carrier 29 is not installed, it is determined that it is in autoloading mode and the carrier 29 is moved to the position shown in FIG.
) (Step S5), the control solenoid 33 is turned ON (Step S6), and the carrier 29 is moved again to the position corresponding to (95) in FIG. 9 (Step S7). Due to the movement of the carrier in S7, the paper bail arm 50-1.5
0-2 is separated from the platen 1, and the platen 1 is rotated in the normal direction in step S8.

When the paper switch 59 detects the leading edge of the cut paper 61-1 (step S9), the platen is further rotated in the normal direction so as to feed the cut paper from this position to the printing start position (step S3).
10), After this, in step Sll, the carrier 29
is returned to the Y direction, the paper bail arms 50-1 and 50-2 are rotated in the platen direction, and the paper bail roller 53 is pressed against the platen l through the cut paper.

During the return of the carrier 29, the CPU 71 determines whether or not the next printing will involve switching the ribbon.
In step S12, it is determined whether or not to print using the top layer of
Judgment shall be made. When ribbon switching is not to be performed, the control solenoid 33 is turned OFF before entering the ribbon switching process (step 513), the carrier 29 is returned to the home position and printing operation is started (step 514), and the ribbon switching is not performed in step 512. At some point, in step S15, the control solenoid is turned on until the desired color band faces the printing position according to the contents of the memory area 83, and when the desired color band faces the printing position, the solenoid is turned off and the carrier 29
is returned to the home position, and step 514 is entered.

On the other hand, when the paper feed cassette switch 57 is turned on in step S4, it is determined that the automatic paper feed mode is in effect, and in step 316, first, cut paper must remain on the platen l, so the platen is rotated forward by a predetermined amount. let me,
Eject the cut paper.

After that, in steps 517 to 520, the cut paper 61-1 in the paper feed cassette is transferred between the platen 1 and the pinch roller 55a.
A loop is formed in between, and the process proceeds to step S8.

As mentioned above, in this embodiment, the paper ejection roller and paper ejection tray, which were previously required for the automatic paper feeder as an option, are installed so that automatic paper feeding and ejection can be performed simply by installing the paper cassette. The paper feed roller is attached to the paper feed cassette, and the paper feed roller is attached to the paper feed cassette. Furthermore, the driving force for the paper feed roller 65, paper discharge roller 19, and tractor can all be extracted from the drive source of the platen, thereby further simplifying the entire structure.

Further, in this embodiment, since the paper ejection roller 19 and the tractor bin wheel 20 are provided on the common shaft 16, the entire spacer can be significantly reduced in size.

Further, in this embodiment, the paper feed roller 6 is attached to the paper feed cassette.
5 is installed and this paper feed roller is operated by power obtained from the platen side, so the paper feed timing with the platen can be accurately determined.

Moreover, the paper feed cassette can be made extremely small.

In addition, in this embodiment, not only can the tractor be used in the pulling method and the pushing method, but also the paper feed cassette is installed in the space where the tractor is located in the pushing method, so the entire area is wide. Miniaturized.

Further, in this embodiment, by simply adding a small control solenoid 33, the paper bail can be raised and lowered and the color of the ink ribbon can be changed by the carrier drive source, and the structure can be simplified.

Further, in this embodiment, since the paper tension vine is provided immediately after passing the platen, no paper is wasted.

Furthermore, in this embodiment, the ribbon is switched and the paper veil is raised and lowered by moving the carrier within the printing range, so that the printer does not become larger in the printing direction.

Further, in this embodiment, the paper bail is raised and lowered by the movement of the carrier, and when the carrier comes to the center of the platen, the platen is rotated forward at this position to feed the cut paper to the printing start position. Therefore, the print head or a paper guide (not shown) fixed to the print head guides the cut paper so that it does not bulge, allowing reliable paper feeding.

Further, in this embodiment, paper is ejected and fed while the carrier moves back and forth between the home position and the center position of the platen.

and ink ribbon switching.

Extremely efficient.

It should be noted that the present invention is not limited to the above embodiments, but can be applied to various devices such as thermal printers other than impact type.

Further, the present invention is not limited to the above embodiments, and can be modified in various ways.

(Effects) As described above, the present invention has a structure in which a paper feed cassette equipped with a paper feed roller can be attached to and removed from a recording device equipped with a paper ejection roller, so that an automatic paper feed system can be realized which is extremely compact and inexpensive as a whole. can be achieved. In addition, in the present invention, it is only necessary to add a few parts to the recording apparatus, and the recording apparatus does not become large.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view of the carrier portion, Fig. 3 is a perspective view of the paper feed cassette, and Figs. 4, 6, and 7 are the paper feed cassette. Figure 5 is a block circuit diagram, and Figures 8 (a) and (b) are side views of the printer when using fan-hold paper. 9C&) and Cb) are explanatory diagrams showing the coupling relationship of gears, FIG. 10 is a timing chart in auto loading mode, FIG. 11 is a timing chart in automatic paper feeding mode, and FIG. The figure is a flowchart diagram. 1---Platen. 3-m-very low feed motor, 8--one rocking plate, 10--one lock lever. 19--One paper ejection roller, 20----Bin wheel, 29----Carrier, 30--One print head, 31----Ribbon cassette. 33 - - Control solenoid. 45---Carrier motor. 47---Cam plate, 50---Paper bail arm, 55---Pinch roller 1 60---One paper feed cassette, 65---One paper feed roller, 67---Feed Paper gear, 68---Stocker

Claims (3)

[Claims] (1) In an automatic paper feeding system for a recording device that includes a recording device and an automatic paper feeding device that is detachably attached to the recording device, the automatic paper feeding device is connected to a paper feeding cassette that stores cut sheets and the paper feeding device. An automatic paper feeding system for a recording device, comprising a paper feed roller that feeds cut sheets in a cassette, and a discharge roller that discharges the cut sheets recorded in the recording device. . (2) The recording apparatus according to claim 1, characterized in that the recording apparatus has a tractor for feeding fan-hold paper, and the drive source for the paper ejection roller is the same as the tractor. Automatic paper feeding system. (3) The recording apparatus according to claim 2, wherein the paper feed roller, the tractor, and the paper discharge roller are connected to the platen by a gear train, and all are driven by the platen. automatic paper feeding system.