JPS61202871A - Paper supply device - Google Patents

Abstract

PURPOSE:To facilitate the switching between the supply of cut papers and supply of a continuous paper, by providing a cut paper feeding passage extended from a paper-supplying stacker to a paper-discharging stacker and a continuous paper feeding passage comprising a pair of tractors for supplying and feeding a continuous paper through a platen. CONSTITUTION:For example, when supplying and feeding a continuous paper, a paper-supplying frame 71 and a paper-discharging frame 95 are detached, a continuous paper is inserted into a manual insertion port 99 from the rear side of the paper supply device 1, and a platen knob is rotated to feed out the leading end of the paper to the side of the tractors 105L, 105R. A paper bail 121 for the tractors 105L, 105R is opened, pins 109 are engaged into perforations, and the continuous paper is slightly fed out by the tractors 105L, 105R. On the other hand, a setting lever 75 is turned to separate a cut paper P from a paper-supplying roller 91 with a printing command supplied, paper- discharging rollers 107L, 107R, a sprocket 111 and the roller 91 are rotated, whereby only the continuous paper is discharged to the rear side after being printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper feeding device that is attached to a printer, typewriter, etc. and is capable of feeding cut paper and continuous paper.

[Technical background of the invention]

Generally, printing devices such as printers and typewriters are supplied with paper for printing from a paper feeding device.

These paper feeding devices can be roughly divided into those that feed cut sheets used for output from a word processor, and those that feed continuous paper used for computer output.

A cut paper feeding device feeds paper stacked on a paper stacker automatically by rotating a paper feed roller, or manually feeds a single sheet of paper between the platen and print head of a printing device. , the printing head prints on the platen, and the printed paper is stored in a paper discharge stacker.

On the other hand, a continuous paper feeder transports the continuous paper via a platen using a pair of left and right tractors, and discharges the continuous paper while printing on the platen using a print head.

[Problems with background technology]

By the way, since recent personal computers are equipped with word processing functions, they often use not only continuous paper but also cut paper. In addition, word processors equipped with computer functions have also appeared, and they sometimes use not only cut paper but also continuous paper.

For this reason, conventionally, for devices that use both cut paper and continuous paper, two paper feeders, a cut paper feeder and a continuous paper feeder, are prepared in one printing device in advance. The paper feeding device can be changed depending on the type of paper.

Therefore, the work of attaching and detaching is troublesome, it is difficult to find a place to store the paper feeder that is not in use, and the cost is high because two paper feeders are required.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive paper feeding device that can easily switch between feeding cut sheets and feeding continuous sheets.

[Summary of the invention]

In order to achieve the above object, the present invention includes a paper feed stacker that is attached to a printing device that performs printing processing along a platen and that stores and stores cut sheets; and a paper feed stacker that feeds the paper on this paper feed stacker toward the platen. a paper feeder for storing the paper after printing on the platen; A pair of tractors that engage with each other and a continuous paper feed path for feeding continuous paper through the platen are provided so that cut paper and continuous paper can be fed by one paper feeding device. It is something.

[Cost for practicing the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In this embodiment, a paper feeding device 1 as shown in FIG. 1 is detachably attached to a paper feeding/discharging port 5 of a printing device 3.

First, the printing device 3 will be schematically explained with reference to FIGS. 1 and 2.

As shown in FIG. 2, a frame 9 is provided inside the cover 7 of this printing device 3, and both sides 9L and 9 of this frame 9 are provided inside the cover 7 of this printing device 3.
A platen shaft 13 is rotatably supported on R1 via bearings 11L and 11R. A platen knob 15L and a gear 17 are attached to one end of the platen shaft 13, a platen 19 is attached to the center, and a gear 21 and a platen knob 15R are attached to the other end.

Further, a motor 23 for driving the platen 19 is attached to the frame 9, and the driving force of this motor 23 is transmitted through gears 24, 25.
The signal is transmitted to the gear 17 via.

Furthermore, as shown in FIG.
a guide 31 and pressure rollers 33 and 35 provided along the circumferential surface of the paper feeder 1, a vapor pail roller 37 that presses the paper against the platen 19, a platen cover 39, and a roller for connecting the paper feeder 1 to the printing device 3. A coupling shaft 41 is provided.

The pressure rollers 33, 35 can be moved to the shaft 4 in FIG. 1 by rotating the pressure lever 43 shown in FIG.
The guide 31 rotates about 5, and is brought into or out of pressure contact with the platen 19.

Further, the vapor pail roller 37 is connected to the vapor pail lever 4
By rotating the arm 51, the arm 51 is rotated about the shaft 49, and the arm 51 is brought into or out of pressure contact with the platen 19.

Next, the paper feeding device 1 will be explained in detail.

This paper feeding device 1 has side frames 53L153R shown in FIGS. 3 and 6 on the left and right sides. A recess 55 into which the coupling shaft 41 fits is formed below the side frame 53L153R. Also, the side frame 53L
, 53R, lock levers 57L and 57R are rotatably supported at their intermediate portions by shafts 59 and 61. These lock levers 57L, 5 and 7R are connected to the connecting shaft 41
This is for fixing the paper feeding device 1 to the printing device 3 via the coupling shaft 41, and includes an engaging portion 63 that engages with the coupling shaft 41. Although the lock levers 57L and 57R are not shown, they are urged toward the coupling shaft 41 by a spring.

At the rear of the side frames 53L, 53R, support shafts 65, 67 are attached to connect the two, as shown in FIG. A bottom plate 69 bent into an N-shape is attached to these support shafts 65 and 67. This bottom plate 6
Reference numeral 9 includes a bottom portion 69A fixed to both support shafts 65 and 67, a stopper portion 69B provided standing up from the tip of the bottom portion 69A toward a manual feed guide 93, which will be described later, and a stopper portion 69B extending further forward from the upper end of the stopper portion 69B. A guide portion 69C is provided extending substantially parallel to the bottom portion 69A.

Furthermore, a paper feed frame 71 that constitutes a part of the paper feed stacker is removably provided at the rear end of the bottom portion 69A.

The support shaft 67 is rotatable with respect to the left and right side frames 53L and 53R, and a paper feed table 73, which together with the paper feed frame 71 constitutes a paper feed stacker, is mounted at the center of the support shaft 67. The rear end is fixed and the set lever shown in Figure 3
75 rotates via a crank 77.

The paper feed table 73 is for storing and storing cut sheets P, and as shown in FIG.
It extends to just before B. One side plate 79R of this paper feed tray 73 is movable along the width direction of the cut paper P, and the other side plate 79L is fixed. Each side plate 79L
, 79R, separation levers 83L, 83R having separation claws 81L, 81R for separating cut sheets P to be taken out one by one are rotatably attached via bins 85L, 85R.

Further, a high friction body such as a cork plate 87 is attached to a portion facing a paper feed roller 91, which will be described later.

Above and in front of the paper feed table 73 is a platen 1 as shown in FIG.
A rotating shaft 89 is provided in parallel with 9, and both ends of this rotating shaft 89 are rotatably supported by both side frames 53L and 53R, respectively. A paper feed roller 91 serving as a paper feed rotation body is fixed to the center of the rotating shaft 89. Note that the paper feed rotating body may be a belt or the like.

A manual feed guide 93 is connected to the platen 19 in front of the paper feed tray 73.
It is tilted to the side and fixed to the side frames 53L and 53R, and passes the cut paper P sent out by the -0 paper feed roller 91 between the manual feed guide 93 and the guide portion 69C of the bottom plate 69 to the platen 19 and the pressure roller. It is designed to be guided between the roller 33 and the roller 33.

Note that a paper ejection frame 95 is removably provided above the manual feed guide 93.

Further, in front of the manual feed guide 93, a conveyance guide 97 formed in a substantially N-shape, a manual feed port 99 formed between the manual feed guide 93 and the manual feed guide 93 are fixed between the side frames 53L and 53R. This conveyance guide 97 has four parts 97A supporting the rear end of the ejected paper on the side of the manual feed guide 93, and a mounting groove 97C in front of the guide groove 97B1 in the center. A static elimination brush 101 is attached to the attachment groove 97C.

Note that the recess 97A of the conveyance guide 97 and the manual feed guide 93
and the paper ejection frame 95 constitute a paper ejection stacker.

A square shaft 103 is mounted on the side frame 5 on the conveyance guide 97.
It is rotatably supported by 3L and 53R.

As shown in FIG. 8, this square shaft 103 has a pair of tractors 105L, 105R on the left and right and two paper ejection rollers 107L, 107R in the middle.

Note that the tractor 105L is fixed in the length direction of the square shaft 103, and the tractor 105R and paper ejection roller 10°7L,
107R is movable in the length direction of the square shaft 103.

The tractors 105L and 105R are equipped with a sprocket 111 having a plurality of bins 109 on its circumference that fit into the perforations (left and right holes) of the continuous paper.
11 from the left and right, guide groove 97B of conveyance guide 97.
A support plate 115 is provided with a protrusion 113 that fits into the support plate 115, and a paper presser 121 that is rotatable about a shaft 117 and has a pin hole 119 is provided on the upper part of the support plate 115.

Above the square shaft 103, a side frame 53 is arranged such that a paper discharge guide 123 is rotatable about a shaft 125, facing the tractors 105L, 105R and paper discharge rollers 107L, 107R.
It is attached to L and 53R. Note that this paper ejection guide 1
A handle 127 is provided on one side of 23.

A gear 129 is attached to the right end of the square shaft 103 as shown in FIG. This is to obtain driving force.

Also, at the left end of the square shaft 103 is a gear 13 as shown in FIG.
5 is installed.

A gear 137 that meshes with the gear 135 is rotatably attached to the shaft 59. A gear 139 that meshes with this gear 137 is supported by a shaft 141. Further, this gear 139 meshes with a gear 143.

This gear 143 has a protrusion 145 inside and is supported by a shaft 149 together with a gear 147 as shown in FIG. gear 1
A pipe 151 into which the shaft 149 is inserted is attached to 47, and a coil spring 153 is fitted into the circumferential surface of this vibrator 151. Note that this coil spring 153 is wound clockwise from the inside to the outside.

As shown in FIG. 5, a stop cam 157 having two protrusions 155 is fitted into the circumferential surface of the coil spring 153, and one end of the coil spring 153 is fixed.

Further, a vibrator 159 is attached to the gear 143 , a shaft 149 is inserted into the vibrator 159 , and a pipe 159 is inserted into the coil spring 153 .

That is, a spring clutch is interposed between gears 143 and 147, and a stop cam 157 is attached to this spring clutch.

A gear 161 is attached to the rotating shaft 89, and this gear 16
1 meshes with gear 147.

On the other hand, a stop lever 163 that engages with a protrusion 155 of a stop cam 157 is rotatably supported by a shaft 165 and biased downward by a spring 167.

Note that covers 169L and 169R are attached to the side frames 53L and 53R, as shown in FIGS. 3, 6, and 8.

Next, the operation of the paper feeding device 1 configured as above will be explained.

First, the case of feeding cut sheets will be explained.

Push down the paper feed tray 73 using the set lever 75 shown in FIG.
They are stacked in a state where they are in contact with the stopper portion 69B of No. 9. Then, the set lever 75 is rotated to push up the paper feed table 73 and press the cut paper P against the paper feed roller 91.

In addition, as shown in FIG. 8, the tractor 105R is
along the paper ejection roller 10.
Move 7L and 107R according to the paper size.

When a printing command is issued in such a state, the motor 23 shown in FIG. 2 is driven to rotate, and the platen 1 is rotated as shown in FIG.
9 and the platen shaft 13 are rotated clockwise. This also rotates the square shaft 103 to the right via the gears 21, 133, 129. Therefore, the sprocket 111 on the square shaft 103 and the paper ejection rollers 107L and 1O7R rotate.

On the other hand, the gear 1 in FIG. 3 attached to the other end of the square shaft 103
35 rotates to the left (rotates in the same direction as gear 129)
do.

This rotation of gear 135 causes gear 143 to rotate clockwise via gears 137 and 139. Therefore, the pipe 151 rotates. At this time, as shown in FIG.
9 idles inside the spring 153. When the gear 143 rotates further and the protrusion 145 pushes up the stop lever 163, the stop cam 157 is unlocked, the pipe 159 and the spring 153 are connected, and the spring 15
The pipe 151 connected to 3 rotates. Therefore, the gear 147 fixed to this pipe 151 rotates clockwise.

This causes the gear 161 to rotate to the left.

The paper feed roller 91 in FIG. 1 attached to the shaft 89 rotates clockwise. Therefore, the cut paper P is sent out, and the cut paper P
Both sides of the tip are caught in the separation claws 81L and 81R and bent.
When the elastic limit is exceeded, the sheet springs and is separated into one sheet, and enters between the platen 19 and the pressure roller 33 along the guide portion 69C of the bottom plate 69 and the manual feed guide 93.

When the cut paper P is held between the platen 19 and the pressure roller 33, the cut paper P is pulled by the rotation of the platen 19.

Therefore, a force is applied to the paper feed roller 91 to rotate it clockwise. This force is transmitted to gear 161 via shaft 89, and further to gear 147 in FIG. 5, causing gear 147 to rotate clockwise.

Gear 147 and platen shaft 13 rotate as cut paper P is pulled by platen 19 and pressure roller 33
Although the direction of rotation is the same as that of the gear 143 that is driven through the gear 21, the speed may be different, so normally a roller equipped with a one-way clutch must be used as the paper feed roller 91. The connecting portion between gears 143 and 147 will be damaged.

However, since the gear 147 is rotating in the direction in which the spring 153 opens, the force from the gear 143 is transmitted to the gear 147, but the force from the gear 147 is not transmitted to the gear 143.

The cassette paper P held between the platen 19 and the pressure rollers 33 and 35 is printed by the print head 29, and is ejected through between the paper ejection rollers 107L, 107R and the paper ejection guide 123.

The leading edge of the cut paper P to be discharged rises along the manual feed guide 93 and the paper discharge frame 95, and when the trailing edge of the paper P is discharged, the trailing edge of the paper is supported by the recess 97A of the transport guide 97. , stored in the paper discharge stacker.

By the way, while the protrusion 145 comes off the stop lever 163 and the tip of the lever 163 falls onto the circumferential surface of the stop cam 157 and continues to rotate, the paper feed roller 91 feeds the cut paper P.
I end up sending out. Then, when the tip of the stop lever 163 engages with the protrusion 155 of the stop cam 157,
The vibrator 159 idles inside the spring 153, and the gear 147 stops rotating.

When the projection 145 pushes up the lever 163 again, the paper is fed. This cycle is repeated, and the cut paper P is automatically sent out at regular intervals.

Note that even if the paper size is changed, the time (feeding distance) from the leading edge of one sheet to the leading edge of the next sheet remains the same.

Therefore, there will be a gap between the short paper and the trailing edge of the paper.

On the other hand, when the platen 19 is reversed to shift the printing position on the paper, the gear 143 is also reversed. As a result, the pipe 159 is also reversed, but since the spring 153 is rotating in the opening direction, the rotational force of the vibrator 159 is applied to the pipe 151.
is not transmitted. Therefore, even if the platen 19 is reversed, the gear 147 does not rotate and the paper feed roller 91 also does not rotate.

Next, the case of feeding continuous paper will be explained.

In this case, the paper feed frame 71 and the paper ejection frame 95
, insert the continuous paper from the rear of the paper feeder 1 into the manual feed slot 99 as shown by the two-dot chain line in Fig. 1, rotate the platen knob 15L or 15R shown in Fig. 2, and insert the leading edge of the paper toward the tractor 105L, 105R. send to.

Then, the paper discharge cover 123 is placed against the manual feed guide 93 as shown by the broken line.

The tractor 105R is moved on the square shaft 103 according to the width of the continuous paper. Paper presser 1 for tractors 105L and 105R
21 is opened, the pins 109 are fitted into perforations provided on both sides of the continuous paper, the paper presser 121 is closed again, the platen knobs 15L and 15R are turned, and the continuous paper is slightly fed out by the tractors 105L and 105R.

On the other hand, the set lever 75 is rotated to push down the paper feed table 73 and separate the cut paper P from the paper feed roller 91.

When a print command is issued in such a state, the cut paper P
The paper ejection rollers 107L, 107R, sprocket 111, and paper feed roller 91 rotate in the same manner as in the feeding.

However, since the cut paper P is not pressed against the paper feed roller 91, the cut paper P is not fed and the sprocket 11
Only continuous paper with perforations fitted in 1.
Paper ejection guide 1 printed by print head 29, fed by sprocket 111, and leaning on manual feed guide 93
23 and is discharged to the rear.

According to the paper feeding device 1 of this embodiment described above, the following effects can be obtained.

(1) Paper ejection rollers 107L, 107R+7) Axis 1 that send the cut paper P fed from the paper feed table 73 by the paper feed roller 91 and printed on the platen 19 to the paper ejection stacker
Since tractors 105L and 105R were installed on o3, 1
Although it is a single paper feeding device, it can feed both cut paper and continuous paper of different types.

This eliminates the need to attach and detach the cut paper feeder and continuous paper feeder depending on the type of paper, unlike in the past.
Furthermore, there is no need to worry about where to place the paper feeder that is not in use.

(2) Shaft 1 of cut paper ejection rollers 107L and 107R
By attaching tractors 105L and 105R to 03,
Since it is possible to feed not only cut paper but also continuous paper, the structure is simple and much cheaper than preparing two paper feeding devices.

(3) Paper ejection rollers 107L, 107R and tractor 1
05L1105R on the same shaft 103, not only can the driving force transmission mechanism be shared, but also the paper ejection path is almost the same for both, allowing the user to operate without confusion.

[Modified example]

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and for example, the following modifications are possible.

(1) In the above embodiment, when feeding continuous paper, the printed paper is pulled and fed by the tractors 105L and 105R, but the paper is pushed into the platen by the tractor and ejected by the rotational force of the platen. It may also be one that feeds paper.

(2) In the above embodiments, a unit tractor that transports sheets only on one side is shown, but a pie tractor that can simultaneously feed and discharge sheets may also be used.

(3) In the embodiment described above, the driving force is obtained from the printing device 3, but the paper feeding device 1 may have a driving source such as a motor.

(4) In the above embodiment, the continuous paper feeding means is provided in front of the cut paper feeding means, but the continuous paper feeding means may be provided behind the cut paper feeding means.

(5) In the embodiment described above, the continuous paper is fed from the manual feed port 99, but the cover 7 and the guide section 6 under the bottom plate 69
Continuous paper may be fed from between 9C and 9C.

〔Effect of the invention〕

As explained above, the present invention provides a paper feed stacker that is attached to a printing device that performs printing processing along a platen and stores cut sheets, and a paper feed stacker that feeds the paper on this paper feed stacker toward the platen. means, a paper discharge stacker for accommodating paper after printing on the platen, and a cut paper feeding path from the paper feed stacker to the paper discharge stacker via the platen, and a perforation of the continuous paper. Since the present invention includes a pair of tractors that match each other and a continuous paper feed path that feeds the continuous paper via the platen, the following effects can be obtained.

(1) Since cut paper and continuous paper can be fed by one paper feeding device, it is possible to easily switch between feeding cut paper and feeding continuous paper.

(2) Two functions can be achieved with one paper feeder, so
Common parts are omitted, making it cheaper.

[Brief explanation of drawings]

Figures 1 to 8 are diagrams showing one embodiment of the present invention.
The figure is a cross-sectional view showing the overall configuration of a paper feeding device and a printing device.
Fig. 2 is a sectional view showing the configuration of the printing device, Fig. 3 is a sectional view showing the structure of the mechanism provided on the left side frame, and Figs. 4 and 5 are sectional views showing the structure around the spring clutch. ,
Figure 6 is a diagram showing the structure of the mechanism provided on the right side frame, Figure 7 is a perspective view of the paper feed tray seen from the rear, and Figure 8 is a diagram showing the structure around the tractor and paper ejection roller. It is a partially cut away diagram.

Claims (4)

[Claims] (1) A paper feed stacker that is attached to a printing device that performs printing processing along a platen and stores cut sheets; a paper feed means that feeds the paper on this paper stacker toward the platen; and printing with the platen. a paper discharge stacker for storing subsequent paper, a cut paper feed path from the paper feed stacker to the paper discharge stacker via the platen, and a pair of tractors that engage with perforations of the continuous paper. , and a continuous paper feed path for feeding continuous paper through the platen. (2) In the paper feeding device according to claim 1,
A paper feeding device characterized in that a driving force for a paper discharge roller for discharging the cut paper and the tractor is obtained from a drive system for the platen. (3) In the paper feeding device according to claim 2,
A paper feeding device characterized in that the paper ejection roller and the tractor are provided on the same axis. (4) In the paper feeding device according to claim 1,
A paper feeding device characterized in that the continuous paper is fed from a manual feed slot provided between the paper feed stacker and the paper discharge stacker.