JPS6274848A - recording device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording device such as a printer or a copying machine, and more particularly to a recording device that uses cut recording paper stored in a paper feed cassette as recording paper.

[Prior Art] 1- In the recording device as described above, a paper feed roller (pickup roller) is required to separate and feed the recording paper sheet by sheet from the paper stack in the paper feed cassette, and In that case, the roller needs to be able to take a feeding position where the recording paper is fed minutely and a retreat position away from the recording paper.

[Problems to be Solved by the Invention] By the way, especially when the paper cassette is arranged in a direction perpendicular to the direction in which the recording paper is fed by the paper feed roller, During the separation feeding operation,
If the operator turns off the power to the device (1 [power off)] or attempts to remove or install a cassette while the paper feed roller is in the feeding position during a power outage, the paper feed roller may There was a risk of tearing the recording paper or damaging the paper feed roller.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording apparatus that eliminates the above-mentioned drawbacks and allows the paper feed cassette to be safely attached and detached.

[Means for Solving the Problems] In order to achieve the object, the present invention automatically feeds recording paper from a removable paper feed tray in a direction substantially perpendicular to the installation direction of the paper feed cassette. a paper feed roller that moves the paper feed roller to the feeding position when recording paper is being fed, and a roller moving means that moves the paper feed roller to the retracted position at other times; The paper feeding cassette is characterized by comprising a blocking means for preventing removal of the paper feeding cassette at least when the paper feeding cassette is in the feeding position.

[Function] In the present invention, the blocking means operates in conjunction with the movement of the paper feed roller, and when the paper feeding roller is at least in the recording paper feeding position, the blocking IF means prevents the installation and removal of the paper feed cassette. Blocked 11-.

[Example] Hereinafter, an example of the wood sniffer 1 will be described in detail with reference to the drawings.

1 to 3 show the main parts of an embodiment of the present invention, and FIG. 4 shows the external appearance of an inkjet printer as an embodiment of the invention incorporating the main parts.

A. Exterior of the recording device In Fig. 4, l is the L side cover, 2 is the lower cover, and 3 is the L side cover.
is the bottom cover, and 4 is the front cover. Reference numeral 5 denotes a stacker that moves forward and backward, and the paper that has been printed is automatically ejected and stored therein. 6 is an operation panel of the printer. 7 is the stay cover, which is reinforced with accent stripes. Further, an L plate 1a made of a translucent material (eg, acrylic) is fixed to the L side cover 1, so that the inside of the printer can be seen.

FIG. 5 shows the appearance of the printer shown in FIG. 4 with the stacker 5 removed and the front cover 4 opened.
2 indicates an ink cartridge, and 13 indicates an ink cartridge 2 release knob. Insert the ink cartridge 12 with the ink supply side facing toward the back. Further, when the ink runs out, by swinging the release knob 13 downward, the ink cartridge 12 is pulled out slightly toward the front, so that it can be removed from the main body of the apparatus by simply pulling it out toward the front.

B. Paper feed cassette structure 17 is a paper feed cassette, and for example, about 100 sheets of recording paper are set. I & , 11
'= part! If you insert it into the printer with 7a facing you,
The paper feed cassette 17 can be installed. Reference numeral 18 denotes a paper cassette release knob, and by swinging this knob 18 downward, the paper feed cassette 17 is pushed forward slightly.

By grasping the handle +7a and pulling it out, the paper feed cassette 17 can be removed from the main body of the printer.

6 shows the cross-sectional structure of the printer along the line Y-Y' in FIG. 4, and FIG. 7 shows the cross-sectional structure of the printer along the line xx' in FIG. Paper cassette 17
and the ink cartridge 12 are shown installed from the front side of the printer, and paper is fed in a direction substantially perpendicular to the installation direction.

As shown in FIGS. 6 and 7, the paper feed cassette 17 has an inclined surface 17b and four positioning parts 17c, 17c.
' is there. Toride! 7a and cassette guide 29
, 30, the positioning pins 32, 32' will eventually engage with the inclined surface 17b of the paper cassette, push down the cassette latch release lever 31, and further insert the paper cassette, one end of the cassette +7d. charges the cassette return spring 34, and finally the positioning bin 3
2, 32' and the cassette groove 17c.

170' is engaged and positioned. The release knob is installed using the release knob 18 press-fitted into the part 31b.
Swing down to release.

The cassette guides 29 and 30 are fixed to the main base plate 20. l: The main plate 20 has a part 20a that is squeezed out, and positioning of the paper feed cassette 17 in the downward direction is performed by the squeezed out 20a and the cassette guides 28 and 30. Support shaft 31a
There is a portion 31b for attaching the knob, and positioning pins 32 and 32' are fixedly provided.

FIG. 8 shows the printer of FIG. 4 with the upper cover l removed.

As shown in FIG. 8, the paper feed cassette described in -h! 7 is between the separation claws 17e, 17e' and the middle plate 17g, similar to the paper feed cassette used in ordinary copying machines.

By pushing the recording paper P from the L side direction against the return springs 17F and 17f', the 0-separation claws 17e and 17e', which can separate the recording paper from the bottom, swing around a support shaft (not shown). (Although the recording paper P is attached with force)
17. Its swing range is restricted by a stopper (not shown) so that it does not come out from the top surface. 17F and 17F' are a pair of left and right return springs, which hold the middle plate 17g and the cassette paper P.
It acts by pushing upwards and raising it a little. Middle plate 17g
is swingably mounted around fulcrums +7h and 17h'.

Appropriate contact pressure (F
) and the friction coefficient a (g) of the paper feed roller 120, it is possible to stably separate the sheets one by one. That is, if the coefficient of friction between paper and paper is #Lp, then the paper separation force is Cμ-JLp)F>O(1).

Here, the return springs 17f and 17f' used have a conical shape.

+7i is a hole located at the bottom of the paper feed cassette container 17, and although two holes are shown in this embodiment, it does not matter if there is one or two or more holes.For example, if the paper is placed on the wrong side When removing unusable paper that has been deformed or deteriorated due to long-term storage in the cassette, the paper can be easily removed by inserting your finger through the 17i. Also,
The presence or absence of paper can be determined by the paper detection sensor SW3 (see FIG. 7) using the hole 17i.

C9 Paper Feed Roller Drive Mechanism FIGS. 9(A) and 9(B) show essential parts of the paper conveyance mechanism shown in FIG. 7. In this figure, 120 is a paper feed roller, and I
II? Is it a notch? This is a sector gear with B118a. This sector gear ttS is rotatably supported on the side plate 151F along with the gear 129 on the same axis 112.

The gear 129 is rotatably supported by the side plate 151.

It is connected to motor M2 via gear 125.

The shaft 120b of the paper feed roller 120 is supported at a rotation rate of 1''BE on a sector gear 118 driven by a motor, and swings downward by 1'' due to rotation of the sector gear 118.

+21 is the paper feed roller axis! 20b, and is connected to the gear 129 via a gear (not shown). Therefore, the paper feed roller 120 has gears 125°129
, 121, it is rotated in the direction of the arrow by the rotation of the motor N2 (in the direction of arrow C).

The paper feed roller 120 includes a metal shaft 120b and an elastic roller 120a made of rubber or the like fixed to the metal shaft 120b, and is supported by the sector gear 118 and a side plate 136 facing the sector gear 118. That is, the position of the roller 120a is oscillated and moved up and down by the pulse motor M2, and the roller 120 is rotated by the motor M2. These two operations are visited independently.

When feeding the recording paper, first, the gear 110, friction clutch 115, . gear 116
, drives the sector gear 118, and drives the paper feed roller 120,
Move the paper cassette 17 to the paper feeding position where it contacts the topmost recording paper. This last sector gear 118 is set to 1 by a stopper (not shown)! Since the subsequent rotation is absorbed by the friction clutch, the rotation angle of the motor only needs to be set to one less than the required rotation angle, and highly accurate control is not required.

Next, motor M2 is excited in the direction of arrow C. As a result, the recording paper is fed out by the frictional force between the rubber portion +20a of the paper feed roller 120 and the recording paper P. and separation claw 17e,
+7e' separates the top sheet of recording paper from the recording paper stack and feeds it toward paper guides 143 and 148.

After the recording paper has been fed, the motor Ml rotates in the D direction, causing the gear 110. Friction clutch 115. sector gear 1
18, side a2 +23 is driven in the opposite direction to the above,
It hits a stopper part (not shown), and thereafter the rotation is absorbed by the office friction latch. As a result, the paper feed roller 120
It moves to the retracted position and does not affect subsequent paper feeding.

In this way, due to the rotational force of the paper feed roller 120.

The topmost sheet of paper in the paper feed cassette 17 is separated, conveyed between the paper guides +43 and 148a, hits the joint between the platen roller (hereinafter referred to as platen) 101 and the registration roller 103, and is further fed. A loop is created between the paper feed roller 120 and the registration roller 103. Thereafter, the platen 101 rotates at a predetermined timing, the recording paper is brought into close contact with the platen 101 by the pressing spring 102, and the paper is further conveyed while being sandwiched between the platen 101 and the pinch roller 104. During recording, the platen 101 feeds the recording paper step by step, and when recording is completed, the paper guide 144,
148 and is discharged to the stacker 5 by a pair of paper discharge rollers 124 and 145 with the print side facing upward.

D. Structure of Erroneous Attachment/Detachment Prevention Mechanism Next, the erroneous attachment/detachment prevention mechanism 11 for the paper feed tray 17 according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG. 1 shows the state when the paper feed roller 120 is in the retracted position away from the recording paper P, and FIG. 2 shows the state when the paper feed roller 120 is in the feeding position (separated position) where it contacts the recording paper P. Fig. 3 shows the main part of Fig.
Shows the configuration as seen from the direction.

In FIGS. 1 to 3, 51 is a wire such as a piano wire, and one end thereof is attached to the base plate (arm) 1 of the paper feed roller 120.
It is connected to the hook part 136b at the rear end of 3B,
The other end is connected to the tip 53a of the A slide member 53. 52 is a direction change guide member, and the wire 5 described in L
1, the direction of the force is changed to approximately a right angle direction. 54 is 879
Both the A slide member 53 and the 8 slide member 54 have groove portions 53d and 53d' formed along the feeding direction of the recording paper p.

54c, 54c', which fit into the long grooves,
A guide pin 57° 57' fixed to the lower main plate (housing) 20b is disposed on the lower main plate 20b so as to slide around.

55 and 56 are springs. As shown in FIG.
and a hook portion 54b at the rear end of the B slide member 54. In addition, the spring 56 is connected to the A slide member 53.
It is stretched between the hook portion 53b at the tip of the slide member 54 and the hook portion 54b at the rear end of the eight slide member 54. The tensile force of these springs 55 and 5B is P55. If P5B, it is set as P55 (P2O(2). That is, the tensile force P of the spring 55 is
The tension force P5B of the spring 56 is larger than that of the spring 55.

Further, at the tip of the cassette latch release lever 31, there is a knob attachment portion 54a that is bent or protrudes downward.

E. Operation of the 1F mechanism to prevent mistaken attachment and detachment Next, we will discuss the operation.

As shown in FIG. 1, the installation and removal of the paper feed cassette 17 is the same as described above, and the paper feed cassette 17 is inserted into the cassette guides 29 and 30, and the paper feed cassette 17 is inserted into the cassette groove 17c.
When the positioning pin 32 of the two-latch release lever 31F is engaged, the cassette 17 is latched. Furthermore, when the paper feed cassette 17 is taken out when the paper feed roller 120 is in the retracted position as shown in FIG. By swinging the release knob 18 downward, the positioning pin 32 will be pulled out downward from the cassette groove 17c.
The latch of the cassette [7 is released. In this way, in the state shown in FIG. 1, the paper feed roller (rubber part) 120a is in the retracted position, so the hook part of the main plate 13B is lowered to the left, and the slide members 53 and 54 are moved to the left by the springs 55 and 5B. Since the knob mounting portion 31b of the cassette latch release lever 31 is shifted in the direction (tangential direction), the B slide member 5
The cassette 17 can be swung in the downward direction of the arrow without contacting the stopper portion 54a of the cassette 17, and the latch of the cassette 17 can be released.

On the other hand, the tensile force P55 of the springs 55 and 5B. Since P2O has the relationship shown in formula (2), when the paper feed roller 120a swings from the retracted position to the paper feed position as shown in FIG. 2, the base plate 138 rotates counterclockwise about the pivot shaft 136d. hand,
The hook portion 13Etb moves upward, and the wire 5! Through this, the A slide member 53 and the B slide member 54 integrally slide to the right (forward) in the drawing against the urging force of the springs 55 and 5B, resulting in the state shown in FIG. 2. In the state shown in FIG. 2, the knob of the cassette latch release lever 31 is attached to the stopper portion (protrusion) 5 of the B slide member directly below the portion 31b.
4a moves, and the knob mounting part 31b is the stopper part 54.
As a result, the release knob 18 cannot be swung downward, and the cassette 17 cannot be latched. In other words, when the paper feed roller 120a is at the paper feed position, the release knob! Since the operation 8 is blocked and the 1 positioning pin 32 cannot be pulled out from the cut groove 17c, the 1 paper cassette 17 cannot be removed.

Next, a case will be described in which the paper feed roller 120a is located halfway between the retracted position and the paper feed position. Paper feed roller 12
0a starts to swing from the retracted position shown in FIG. Part 31
The latch of the paper feed force sensor) 17 can be released until it reaches the position directly below b), and the system stops at this intermediate position, and even if the paper feed cassette 17 is installed or removed, the recording paper P and the paper feed will not be released. The roller 120a will not be damaged yet.

On the other hand, from this state, the slide members 53 and 54 are
-The user (operator)
If the user pushes the release knob 18 downward with a force of -,
The knob mounting portion 31h is in pressure contact with the stopper portion 54a, and B
The pressing of the slide member 54 is stopped by the car. However, since the A slide member 53 is only connected to the B slide member 54 by the spring 5B, it is pulled by the wire 51 and continues to slide in the right direction (progressing direction) in the drawing, and the paper feed roller 120a moves to the paper feed position. and is set.

After that, when the user releases the release knob 18, the pressure contact between the knob attachment part 31b and the stopper fi54a is released, so that the B slide member 54 is moved between the rear stopper part 53c of the A slide member 53 and the rear part of the B slide member 54. It slides until it comes into contact with the stopper portion 54b. That is,
When the slide members 53 and 54 enter the release prohibited zone, the latch of the paper feed cassette 17 cannot be released, and the paper feed operation of the paper feed roller 120 can be stably operated without any hindrance.

[Effects of the Invention] As explained below, according to the present invention, by operating the cassette attachment/detachment drive means in conjunction with the paper feed roller,
When the paper feed roller is at least in the paper feeding position,
Since the paper feed cassette cannot be attached or detached, it is possible to achieve the remarkable effect of eliminating accidents such as tearing the recording paper or damaging the paper feed roller due to incorrect attachment or detachment of the cassette.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the present invention when the paper feeding section is in a retracted position. Figure 2 is a sectional view showing the paper feed section in Figure 1 when it is in the separated position, Figure 3 is a plan view showing the structure of the slide member in Figure 1, and Figure 4 is the paper feeder in Figure 1. FIG. 5 is a perspective view showing the appearance of an inkjet printer according to an embodiment of the present invention having a built-in paper section; FIG. 5 is a perspective view showing the paper feed cassette section of the printer shown in FIG. 4; 6 is a sectional view showing the internal structure along line Y-Y' in FIG. 4, FIG. 7 is a sectional view showing the internal structure along line xx' in FIG. 4, and FIG. 9(A) and 9(B) are a perspective view and a cross-sectional view of essential parts showing the configuration of the drive system of the paper feed section in FIG. 1. be. 17... Cassette, 31... Cassette latch release lever, 32... Positioning bin, 31b... Release knob, 51... Wire, 53... A slide member, 52... Direction change guide Members: 54...B slide member, 54a... Stopper portion. 55, 58... Spring, 57, 57'... Guide pin, 120... Paper feed roller (pickup roller). Figure 4 of Rin Kio of Arinta IIQ Arinta and Gosha Fukuji Gakup of Sanoguchiguchi and Four Hole Lr

Claims (1)

[Claims] 1) A paper feed roller that automatically feeds recording paper from a removable paper feed cassette in a direction substantially perpendicular to the mounting direction of the paper feed cassette; move it to the sending position,
a roller moving unit that moves the paper feed roller to the retracted position at other times; and a roller moving unit that operates in conjunction with the movement of the paper feed roller to prevent removal of the paper feed cassette when the paper feed roller is at least in the feed position. A recording device comprising a blocking means.