JPS62264132A - Recording device - Google Patents

Abstract

PURPOSE:To eliminate troubles such that a storage sheet is broken and a feed roller is damaged, by providing such as arrangement that a paper feed cassette is not moved when a sheet feed means makes into contact with a sheet so that a fed sheet is prevented from rushing out from the position of the device even though a lock means is erroneously released. CONSTITUTION:Resilient rollers 120a among paper feed rollers 120 are made of materials such as rubber, having a large frictional coefficient so that the frictional force of the rollers with respect to a sheet P making into contact with the same is greater than the force of a spring for returning a cassette. In this arrangement, even though the positioning of a paper cassette 17 is released by moving a cassette knob 18 for example, downward, there is no such a risk that the paper feed cassette is pushed out by the returning force of the cassette returning spring 34 and therefore the cassette is separated away from from the position of the device, since the paper feed rollers 120 make into contact with the sheets P stored in the paper feed cassette 17 at the position of the device. Accordingly it is possible to prevent the sheets P stored in the cassette from being broken, and to prevent the paper feed rollers from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application The present invention provides an in-line recording medium for recording images, characters, etc. on a sheet-like recording medium. The present invention relates to a recording device such as a printer, and particularly to a recording device equipped with a paper feed cassette that stores a recording medium.

(B) Conventional technology Conventionally, a recording device has a paper feed cassette for storing a sheet-shaped recording medium (hereinafter referred to as a sheet), and is also equipped with a paper feed roller, and the paper is stored in the paper feed cassette by the paper feed roller. The printed sheets are separated and fed one by one to the recording system. Then, the paper feed roller moves up and down so that it can take a feeding position where it contacts the sheet when feeding the sheet and a retracted position where it is away from the sheet.

←1 Problems to be Solved by the Invention By the way, for example, if the operator turns off the power to the device while the paper feed roller is in the process of separating and feeding sheets, or if the power is cut off due to a power outage, the paper feed roller may It may remain in the sending position. In particular, the paper feed cassette is perpendicular to the sheet feeding direction of the paper feed roller (perpendicular direction).
(If the paper feed roller is configured to be removable and the paper feed cassette is moved using a cassette pushing member etc. while the paper feed roller remains in the feeding position, the sheets may be torn by the paper feed roller. In addition, there is a risk that the paper feed roller may collide with the paper feed cassette and be damaged.

(c) Means for solving the problem The present invention aims to solve the above-mentioned problem, and the frictional force caused by the contact between the sheet feeding means and the sheet is greater than the extrusion force of the cassette extrusion means. The present invention is characterized in that when the sheet feeding means is in the feeding position, the pushing out of the paper feeding cassette by the cassette pushing out means is restricted even if the locking means is unlocked.

(e) Operation Based on the above-mentioned configuration, when the sheet feeding means is in contact with the sheet at the feeding position, the cassette pushing means prevents the sheet feeding means from coming into contact with the sheet even if the locking means is unlocked. The paper feed cassette that stores the sheets cannot be moved due to the F!JFfJ force.

(f) Example Embodiments of the present invention will be described below along with the drawings.

Inkjet printer (hereinafter referred to as printer) M
As shown in Fig. 2, the upper cover 1 and the lower cover 2 are
, has a bottom cover 3 and a front cover 4, and is provided with a stacker 5 which is detachably attached to the top in the direction of the arrow and automatically stores sheets after recording is completed. An upper plate 1a made of a translucent material such as acrylic is fixed to the upper cover 1. Further, an operation panel 6 is provided above the front cover 4, and a stay cover 7 is provided between the operation panel 6 and the front cover 4.
is fixedly installed, and the stay cover 7 functions as a reinforcement and an accent strip. Furthermore, the lower cover 3
A stacker knob 8 is provided near the stacker 5,
When removing the stacker 5, use the knob 8 to release the stacker 5 from the mounting position. The printer M is provided with a power cord 10 on the opposite side of the front cover 4, as shown in FIG. Connector 11 Connector ll for inputting n, R, G, and B signals
A connector 11c for inputting image data from an external device such as a computer and a personal computer is provided. FIG. 4 shows the printer M with the stacker 5 removed and the front cover 4 opened, with the support shaft 4a of the front cover 4 attached to the support portion 2a of the lower cover 2. The front cover 4 is supported so as to be openable and closable.

When the front cover 4 is closed, the hook 4b of the front cover 4 engages with the stay cover 7 to hold the front cover 4 at the position. Further, an ink cartridge 12 is arranged inside the front cover 4, and an ink cartridge release knob 13 is provided.

The ink cartridge 12 is inserted with the ink supply side at the back, and when the ink runs out, when the release knob 13 is rocked downward, the ink cartridge 12 will pop out slightly toward you, so you can then pull it out toward you. The printer will be removed from the printer.

Furthermore, a roller release knob 14 and a four-color reset button 15 are arranged adjacent to the ink cartridge 12, and the roller release knob 14 is used to control the registration roller 103 and pinch roller 1'04 relative to the platen roller 101, which will be described later. To release pressure welding and avoid sheet damage in the event of trouble such as sheet jamming. Further, the roller reset button 15 is pressed when the registration roller 10 is released from pressure contact.
3 and the pinch roller 104 again to the platen roller 101.
In addition, a paper feed cassette 17 is removably mounted below the mounting position of the stacker 5 with the handle 17a in front.
-17 is pushed forward slightly when the paper feed cassette release knob 18 is swung from top to bottom, and is removed from the main body of the printer M by grasping the handle portion 17a. Further, FIG. 5 shows a printer M with the upper cover 1 and stacker 5 removed.
In the plan view, the paper feed cassette 17 is arranged on the main base plate 20, and the paper feed/discharge system 100, recording system 200, recovery system 400 such as a pump unit, power supply unit 600, etc. are fixed on the main base plate 20. It is set up.

Next, the paper feed/discharge system 100 of the printer M will be explained based on FIGS. 6 and 8.

FIG. 6 is a sectional view taken along the line MM in FIG. 1, showing in detail the arrangement of the paper feed/discharge system 100, stacker 5, and paper feed cassette 17 of the printer M.

As shown in detail in FIG. 6, the paper feed/delivery system 100 includes a platen roller 101, a pair of discharge rollers 124 facing the stacker 5, and a paper feed roller 120 facing the paper feed cassette 17. There is. A registration roller 103 and a pinch roller 104 are arranged near the platen roller 101, and these rollers 103 and 104 are in contact with the platen roller 101, respectively. Furthermore, a paper pressing spring 102, a lower paper guide 143, an upper paper guide 146, and a transparent paper guide 14 are provided at the periphery of the platen roller 101.
The transparent paper guide] 44 is made of a transparent material like the upper plate 1a of the upper cover 1 described above, and extends from the top of the printer M to the upper plate 1a and the transparent paper guide. The inside can be visually observed through the guide 144.

Further, as shown in FIG. 8, the paper feed roller 120 is
A sector gear support shaft 1 consisting of a paper feed roller shaft 120b and an elastic roller 120a fixed to the shaft 120b, with one end of the shaft 120b disposed parallel to the shaft 120b.
It is rotatably supported by a sector gear 118 that is pivotally supported by the sector gear 12, and the other end is supported by a side plate 136 facing the sector gear 118. Furthermore, a paper feed roller drive gear 121 is fixedly installed at one end of the paper feed roller shaft 120b, and a gear 12 is fixed to the sector gear support shaft 112.
9 is rotatably arranged, and further a paper feed roller drive motor M
An output shaft gear 125 is attached to the output shaft of the motor M through these gears 121, 129, 125, etc.
2 and the paper feed roller 120 are connected, and the paper feed roller 120 is rotated by the rotation of the motor M2. Furthermore, the tooth portion 118b of the sector gear 118 meshes with the left clutch gear 115b forming the friction clutch 115, and the right clutch gear 1 that is paired with the left clutch gear 115b.
15a meshes with the output shaft gear 110 of the pulse motor M1, and the sector gear 118 is connected to the pulse motor M1. The rotation of the pulse smoke M1 causes the sector gear 118 to rotate, and the paper feed roller 120 supported by the sector gear 118 swings up and down as the sector gear 118 rotates. That is, the paper feed roller 120
is oscillated up and down by a pulse motor M1, and rotated by a paper feed roller drive motor M2.

Note that the swinging and rotation of the paper feed roller 120 are controlled independently.

Then, when feeding the sheet, first, by rotating the pulse motor M1 in the opposite direction to the arrow direction, the gear 110, friction clutch 115, and sector gear 1]8 are set to N! Move the paper feed roller 120 to the feeding position where it contacts the uppermost slot of the paper feed cassette 17. At this time, sector gear 118
is stopped by a stopper (not shown), and the subsequent rotation is absorbed by the friction clutch 115. Therefore, the rotation angle of the pulse motor M1 can be set to a required rotation angle or more, and highly accurate control is not required. Next, the paper feed roller drive motor M
2 in the direction of arrow C. As a result, the paper feed roller 12
0 is the VaF of the elastic roller 120a and the sea 1-P.
@ Send out Sea 1-P by force.

Then, the uppermost sheet 1-P is separated from the other sheets 1-P by the separating claw 17e, which will be described briefly. It is separated from P and sent along the sheet guide 143.

After the feeding of the sheet P is completed, the rotation of the pulse smoke M1 in the D direction causes the output shaft gear 110 and the friction clutch 11 to
5. The sector gear 118 is driven in the opposite direction to that described above,
After hitting the stopper part (not shown), f! 115 rotations of the j1 friction clutch are absorbed. As a result, the paper feed roller 120 moves to the retracted position and does not affect subsequent sheet feeding.

In this way, the rotational force of the paper feed roller 120 causes the uppermost sheet 1 in the paper feed cassette 17 to rotate. P is separated into one piece,
The paper is conveyed along the paper guide 143 and the platen roller 10
1 and the registration roller 103 at the nip,
Further, the paper is fed to the feed roller 120 and the registration roller 10.
Create a loop with 3. Thereafter, the platen roller 101 rotates at a predetermined timing, and the paper pressing spring 102 brings the sheet P into close contact with the platen roller 101. Furthermore, the platen roller 101 and the pinch roller 104 pinch and convey the sheet. During recording, the platen roller 101 feeds the sheet P in steps, and when recording is completed, the sheet P is discharged to the stacker 5 with the recording surface facing up via the sheet guides F114 and 116 by a pair of discharge rollers 124.

Further, the stacker 5 will be explained based on FIGS. 2, 6, and 7.

FIG. 7 is a sectional view taken along line 2--2 in FIG. 2, and shows in detail the stunning force 5 of the printer M and the arrangement of the paper feed cassette 17.

The stacker 5 has a sheet outlet 5 as shown in FIG.
・The upper plate 5aJt4J'a has a flat plate shape and is located at approximately the same position as the upper cover 1 of the plink M. The sheets discharged and stored in the upper plate 5 may be taken out by opening the upper plate 5a (or they may be taken out from the sheet outlet 5t without opening the upper plate 5a. A part of it is cut out,
When opened, a person's finger can be caught on the notch to make it easier to open. Further, the upper plate 5a is made of a light-transmitting member, so that the interior can be visually observed through the upper plate 5a. The stacker 5 has a main base plate 20 as shown in FIG.
The rail i 22 a of the stay 22 is further supported on the rail surface 21 m of the stacker guide 21 fixed to the main base plate 20 and the stay support shaft 23 fixed to the main base plate 20 . When the sticker 5 is attached, as shown in FIG. 6, the fitting hole 5d provided at the tip of the stacker 5 fits into the fitting pin 1b of the upper guide, and the stacker 5
The sheet discharge hole 5e is positioned so as to correspond to the pair of discharge rollers 124 of the sheet feed/discharge system 100 described above. Further, a stacker return spring 24 is fixed to the main base plate 20 facing the rear end when the stacker 5 is installed, and a slide lever 25 is provided in the vicinity of the return spring 24 so as to be slidable on a lever guide 27. ing. Further, a stop pin 26 is fixed to the slide lever 25.
6 engages with the stacker 5 and controls the movement of the stacker 5 in the pulling direction by tJL. Further, the slide lever 25 is connected to the stacker knob 8, and when the slide lever 25 is moved by the stacker knob 8, the lever 25 is moved, and the lever 5 of the stop pin 26 is moved. is disengaged, and the stacker 5 is moved to the stacker return spring 24.
It is pushed out in the pulling direction, and when it is pulled out further, it completely burrs and separates from M. At this point, troubles such as sheet jams inside the printer M can be dealt with.

Further, a stacker attachment detection switch SW8 is provided near the discharge roller pair 124 of the supply and discharge system 100,
When the stacker 5 is detached from the printer M, the paper feed/discharge system 100 and the recording system 200 do not operate even if the recording start button is pressed. The sticker 5 also has a sheet stacking section 5.
c, and the sheet stacking portion 5c has a gradual upward slope as it moves away from the sheet discharge hole 5e, and as shown in FIGS. It is formed by retracting a predetermined amount without expanding all at once, so that even if the sheet is curled and discharged in a direction perpendicular to the discharge direction on the sheet stacking section 5c, the sheet is stacked without coming into contact with other sheets. Since the sheets can be easily discharged and stored, a large number of sheets can be stored, and the sheets stacked on the uphill sheet stacking section 5C can be easily taken out. Furthermore, a recess 5h is formed on the bottom surface 5g of the stacker 5 (at the sheet outlet 5f3!1i-i).
is formed (see Fig. 7), and the sheet stacking section 5c
When taking out a sheet that has been discharged and stored, it is easy to insert a finger into the recess 5h, making it easier to take out the sheet.

Furthermore, the paper feed cassette 17 will be explained based on FIGS. 5 to 7.

As shown in detail in FIG. 6, the paper feed cassette 17 is guided by cassette guides 29 and 30 fixed to the main base plate 20 below the stacker 5 to feed the sheets of the paper feed roller 120. It is detachably attached in a direction substantially perpendicular to the direction. As shown in FIGS. 5 and 6, the paper feed cassette 17 has a return spring between the separation claw 17e and the middle plate 17g, similar to the paper feed cassette used in ordinary copying machines. The sheet can be set by pushing the sheet 1-P from above against the force 17f. The separation claw 17e is attached to be swingable around a support shaft (not shown), but its range of swing is restricted by a stopper (not shown) so that the sheet P does not come out from the top surface of the cassette 17. The pair of left and right return springs 17f act to push the middle plate 17g and the seat P upward. Middle plate 17g is fulcrum 17
It is attached so that it can swing around h. Then, due to the appropriate contact pressure (F) of this return spring 17'' and the friction coefficient (μ) of the paper feed roller 120, stable operation is achieved.
1') can be separated one by one. That is, if the coefficient of friction between the sheets is μp, the separation force of the sheets is Cμ−μp)F>0 (1).

The 17f used here has a conical shape.

Reference numeral 17i designates various holes at the bottom of the paper feed cassette 17, and although two holes are shown in this embodiment, even if there is only one hole, two holes
It doesn't matter if it's more than one. For example, when the front and back of the sheet are wrongly placed, or when removing a sheet 1- that has been stored in the cassette 17 for a long time and is deformed or deteriorated and cannot be used, the holes 1-
The sheet can be easily removed by inserting a finger from 7i. Second, the presence or absence of a sheet can be determined by the sheet detection sensor SW3 using the hole 17i.

Further, as shown in detail in FIG. 7, the paper feed cassette 17 has an inclined surface 17b formed at the tip end 17d when the cassette is attached, and a positioning recess 17c formed near the handle 17a. Furthermore, a bar 31 is attached to the main base plate 20 below the paper feed cassette yh 17 after releasing the cassette latch.
The lever 31 is swingably supported at the lever 1a.
A positioning pin 32 is fixedly attached to the knob mounting part 31b to which the cassette release knob 18 is attached.
is formed. Further, a pressing plate 33 is fixed to the main base plate 20, and the pressing plate 33 urges the cassette latch release lever 31 so that the positioning pin 32 engages with the positioning recess 17c of the paper feed cassette. Further, a cassette return spring 34 is fixed to the stacker guide 21. Then, the cassette 17 is grabbed by the handle part 17a and the cassette is turned off!・When inserted along guide 29.30,
First, the positioning pin 32 is placed on the inclined surface 1 of the cassette 17.
7b is pressed down, and then the paper feed tray 1-17 is further inserted, the tip end 17d charges the cassette return spring 34 and the cassette 17 stops. Then, the positioning pin 32 is released from its suppression and engages with the four positioning portions 17c of the paper feed cassette 17, thereby positioning the paper feed cassette 17 at this position. The vertical positioning of the cassette 17 is performed using the cassette guides 29, 30 and the main base plate 2.
This is done with the protrusion 20a formed at 0. Furthermore, when the cassette knob 18 is moved downward, the cassette latch release lever 31 is displaced against the biasing force of the pressing plate 33.
The engagement between the positioning pin 32 and the four positioning portions 17c is released, and the paper feed cassette 17 is pushed outward by the return force of the cassette return spring 34, and is removed from the mounting position.

Furthermore, a mechanism for preventing the paper feed cassette 17 from being accidentally removed will be explained based on FIG.

FIG. 1 shows a state in which the paper feed roller 120 is in a feeding position where it contacts the sheet 1-P stored in the paper feed cassette 17. By the way, when the paper feed roller 120 is in this feeding position, if the cassette 18 is moved downward, the cassette latch release lever 3 is moved as described above.
1 is displaced against the biasing force of the suppressing plate 33, the engagement between the positioning pin 32 and the positioning recess 17c is released, and the cassette return spring 34 returns the paper feed cassette 17 outward with a force F'. Trying to push it out. By the way, the paper feed roller 12
o, the elastic roller 120a is made of a material with a large friction coefficient such as rubber, and the elastic roller 120a
Due to the material, shape, etc. of the elastic roller 120a, the total f of the friction force caused by the contact between the cassette return spring 34 and the elastic roller 120a is configured to be larger than the return force F' of the cassette return spring 34. Therefore, even if the cassette knob 18 is moved downward and the positioning of the paper feed cassette 17 is released, the paper feed roller 120 is still in contact with the sheets P stored in the paper feed cassette 17 at the feeding position. The paper feed cassette 17 is not pushed outward by the return force F' of the cassette return spring 34 and is not removed from the mounting position, so that the sheets stored in the paper feed cassette 17 are not torn or the paper feed roller 120 will not be damaged.

(g) As described in detail, according to the present invention, when the sheet feeding means is in contact with the sheet at the feeding position, the paper feeding cassette that stores the sheet does not move from the mounting position. This prevents the paper feed cassette from jumping out of its installed position even if the locking mechanism is accidentally unlocked, preventing problems such as the sheets stored in the paper feed cassette being torn or the paper feed rollers being damaged. disappears.

[Brief explanation of drawings]

Fig. 1 is a side view showing a paper cassette separation prevention mechanism of an inkjet printer according to an embodiment of the present invention, Fig. 2 is a perspective view of the printer as seen from the front, and Fig. 3 is a perspective view of the printer as seen from the rear. Figure 4 is a perspective view with the front cover and stacker removed, Figure 5 is a plan view with the upper cover and stacker removed, and Figure 6 is a sectional view taken along line MM in Figure 2. , Figure 7 is a cross-sectional view of Figure 2 ■-■,
FIG. 8 is a perspective view showing the paper feed roller moving mechanism. M... Recording device (inkjet printer), P...
... Sheet, F'... Extrusion force of the cassette pushing means (returning force of the cassette return spring), f... Frictional force due to contact between the sheet feeding means and the sheet (due to contact between the elastic roller of the paper feeding roller and the sheet) total frictional force), 32
...Lock means (locating pin), 34...
Cassette pushing means (cassette return spring),
120...Sheet feeding means (paper feeding roller).

Claims (2)

[Claims] (1) A removable paper feed cassette that stores a large number of sheets; a locking means that locks the cassette in a predetermined position;
cassette pushing means for pushing out the paper feeding cassette outward when the locking means is unlocked; a feeding position for feeding sheets stored in the paper feeding cassette and contacting the sheets; and a feeding position for separating from the sheets. and a sheet feeding means that is displaced to a retracted position, wherein the frictional force caused by contact between the sheet feeding means and the sheet is larger than the pushing force of the cassette pushing means, A recording apparatus characterized in that when the sheet feeding means is in the feeding position, the pushing out of the paper feeding cassette by the cassette pushing out means is restricted even if the locking means is unlocked. (2) The recording apparatus according to claim 1, wherein the sheet feeding means feeds the sheets stored in the paper feeding cassette in a direction substantially perpendicular to the cassette pushing direction of the cassette pushing means. .