JPH01317941A - Manual insertion paper feed device - Google Patents

Abstract

PURPOSE:To arrange so that a change between manual insertion paper feeding and automatic paper feeding may be easily conducted, by arranging a structure in which, when a recording paper mounting plate has moved to the front of a recording paper transport direction in linkage with the up and down action of a recording paper guide plate, the tip portion of this releases the press-welding of a sending out roller and a recording paper sheet within a cassette. CONSTITUTION:When a guide plate 2 is rotated to a manual insertion paper feedable state from a stand-up retreating state, the guide plate 2 makes a turning movement clockwise with a shaft 1a as a center. With this turning movement, a mounting plate 3 moves to the front of a recording paper transport direction, namely, to the inner direction of a device by means of a guide member 4. As a result of this movement, the tip portion 3e of the mounting plate 3 engaging with the guide member 4 cuts off the press-welding of the 2nd sending out roller 9 and a recording paper sheet on a paper feed cassette 20. Accordingly, automatic paper feeding by means of the paper feed cassette 20 is prevented at the time of manual insertion paper feeding, and the recording paper sheet sent out of a mounting position by means of the 1st sending out roller 8, is added with the force of transport by means of the 2nd sending out roller 9 when it passes the vicinity portion of this tip portion 3e and the 2nd sending out roller 9.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a manual paper feeding device for recording paper in an image recording apparatus such as an electrophotographic copying machine.

[Background of the invention]

Image recording devices such as electrophotographic copying machines and printers are generally configured to feed a sheet of recording paper from outside the machine, transfer and record images such as characters onto it, and then take it out of the machine. . Sheet-shaped recording paper is usually of a frequently used size and quality, and is stored in a special paper feed cassette made to suit the paper, and is loaded into the recording device, and the image recording device is loaded with paper feed rollers, etc. The paper feeding means automatically pulls out the sheets one by one from the cassette and supplies them into the machine. Although this automatic paper feeding method is suitable when you want to obtain a large number of copies of the same size and paper quality, if you want to change the size or paper quality of the recording paper, even if the number of copies is - Even if there is a paper cassette, it is necessary to replace each cassette, and there are many inconveniences such as not being able to use recording paper of a non-standard size that does not fit the cassette. Nowadays, many printers are equipped with a manual paper feeder that can manually feed recording paper of any size and quality one by one. This manual paper feeder is equipped with a recording paper guide plate that is pivoted to the side of the image recording device so that it can be raised and lowered, and when automatically feeding paper using a paper feed cassette, it stands up and touches the side of the recording device. However, when it is rotated and placed in a position where manual paper feeding is possible, the paper feeding function from the paper feed cassette is stopped and the manual paper feed inserted from the recording paper placement plate is It is installed in the conveyance section of the recording device and receives the image transfer, making it extremely convenient for the user to record non-standard recording paper or small amounts of recording paper at any time without removing the paper feed cassette. It is being

[Problems to be solved by the invention]

However, in order to release the pressure contact between the recording paper in the paper feed cassette and the delivery roller, a special mechanism is required, as disclosed in Japanese Utility Model Application Publication No. 63-13934, for example, and the device is expensive. There was a drawback. In addition, a method of intervening a shield between the feed roller and the recording paper in the paper feed cassette, for example, Japanese Patent Publication No. 55-459
Publication No. 01 also has problems in terms of operation, such as the need to push in or pull out the shield every time the mode of manual single-white dynamic sheet feeding is changed, which is cumbersome. The present invention has been made to solve the above-mentioned problems, and aims to provide a manual sheet feeder that has a simple mechanism, is inexpensive, and has a reliable feeding effect.

[Means to solve the problem]

The above purpose is to use recording paper to guide manually fed recording paper in a manual paper feeder that prevents automatic paper feeding by intervening a shield between the feed roller and the recording paper in the paper feed cassette. A guide plate is pivotally attached to the main body of the manual paper feeder so that it can be raised and lowered freely, and a recording paper mounting plate on which the guided recording paper is placed is moved in the recording paper transport direction in conjunction with the raising and lowering movement of the guide plate. a push-up plate that is movably provided in the recording paper mounting plate and that pushes up the recording paper placed thereon and presses it against the feed roller;
When the recording paper mounting plate moves forward in the recording paper transport direction in conjunction with the up-and-down movement of the recording paper guide plate, the tip of the recording paper mounting plate becomes the shield, and the paper is automatically fed by the paper feed cassette. This is achieved by a manual sheet feeding device characterized in that the push-up plate is configured to be able to move in and out of the notch at this time.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a cross-sectional view showing the manual paper feeding device according to the present invention set to allow manual paper feeding, and FIG. 2 is a cross-sectional view showing the device in a retracted state where manual paper feeding is not possible. In FIGS. 1 and 2, 2 is the pivot shaft 1 of the main body l of the device.
The main body 11 is a recording paper guide plate which is pivotally attached to the main body 11 and is movable up and down. 3 is the 7th hook part 2a of the recording paper guide plate 2
This is a recording paper mounting plate (see FIG. 3) that is engaged with the guide plate 2 and is movable in conjunction with the up-and-down movement of the guide plate 2. Recording paper mounting plate 3
A rectangular notch hole 3a is bored in approximately the center of the holder, and a push-up plate 5, which will be described later, comes out and retracts from this notch hole 3a, and the recording paper placed on the recording paper placement plate 3 is placed on the recording paper placement plate 3. It is pushed upward and comes into pressure contact with a first delivery roller 8, which will be described later. The vicinity of one end of the cutout hole 3a is bent in a step-like manner to form a stopper portion 3b for the recording paper. The front ends of the plurality of recording sheets are brought into contact with this stopper part 3b+, and the recording sheets are regulated and placed in an orderly manner. There are retaining pieces 3 on both sides of the recording paper mounting plate 3.
c is provided protrudingly. Reference numeral 4 designates a pair of guide members (see FIG. 3) which are pivotally attached to the main body of the recording apparatus l and engage with both sides of the recording paper mounting plate 3 to guide and position the mounting plate 3; Only one side is shown in FIG. One longitudinal end of the engagement guide groove 4b of the guide member 4 is open, and the other end is closed. The engagement piece 3c of the recording paper mounting plate 3 engages with this engagement guide groove 4b. The recording paper mounting plate 3 is guided by the engagement guide groove 4b and reciprocates in the direction of the arrow in FIG. 3 in conjunction with the up-and-down movement of the recording paper guide plate 2. When the recording paper guide plate 2 is set in a state where manual paper feeding is possible, the engagement piece 3C of the recording paper mounting plate 3 comes into contact with the groove end 4d of the engagement guide groove 4b and stops moving. The shaft portion 4a of the guide member 4 is loosely inserted into a pivot hole 1c drilled in the side wall of the device main body l (see Fig. 4), and a locking member such as a retaining ring is fitted from the outside of the side wall. Mounted so that it can swing. The retaining protrusion 4C of the guide member 4 is slidably engaged with a U-shaped notch tb provided on the side wall of the device main body l,
It is biased in one direction by a coil spring 7. Reference numeral 5 denotes a push-up member, which in the embodiment is fixed to the swing shaft 6 and has a cutout hole 3a provided near the center of the recording paper mounting plate 3.
This is a push-up plate that comes and goes from (see Figure 3) and pushes up the recording paper. The push-up plate 5 is fixed to a substantially central portion (see FIG. 5) of a swinging support shaft 6 that is supported between the side walls of the main body 1 of the recording apparatus. 8 is a first delivery roller provided above the push-up plate 5. Reference numeral 9 denotes a second delivery roller provided on the downstream side of the first delivery roller 8 in the recording paper conveyance direction. This second delivery roller 9 also serves as a delivery roller for the paper feed cassette 20. Reference numeral 10 denotes a separating roller provided on the downstream side of the second feed roller 9 in the recording paper conveyance direction. Reference numeral 11 denotes a stop roller that comes into pressure contact with the separating roller IO and cooperates with the separating roller 10 to separate and feed the recording sheets one by one. In FIG. 4, G1 is a gear that meshes with a drive member on the recording apparatus main body side (not shown). G, through G1° are all pivotally attached to the side wall of the device main body l, and are meshed sequentially to form gears G,
It is a gear that transmits the driving force from the 12 is a cam member (sixth
(See Figures (A) and (B)). One end of the spring 13b of the spring clutch 13 is locked to the spring clutch body 13a,
The other end is locked in a locking hole 12a of the cam member 12. Gear G of the connecting member 14. and the boss portion 14a is the connecting support shaft 14
The boss portion 14a is integrally fixed to the spring 13b and inserted into the inner diameter portion of the spring 13b. Reference numeral 15 designates an electromagnetic solenoid that is arranged so that an actuating piece 15a that is swingable in the direction of the arrow I engages with an engaging pawl 13c of the spring clutch 13. Reference numeral 16 denotes a lever member that is pivotally attached to the side wall of the apparatus main body 1 and swings by sliding in contact with the cam surface of the cam member 12. Reference numeral 17 denotes a swinging member (fifth (see figure). Next, the operation will be explained. In FIGS. 1 and 2, when the recording paper guide plate 2 is rotated from the upright retracted state to the manual paper feeding state, the recording paper guide plate 2 rotates about the pivot shaft 1a of the main body l of the apparatus. Rotate and move clockwise as shown. The rear bent end 3d of the recording paper * placing plate 3 comes into contact with the pressing portion 2b of the recording paper guide plate 2 and is pressed, and is guided by the guide member 4 and moves inward of the apparatus at the front in the recording paper conveyance direction. . Then, as shown in FIG. 3, the engagement piece 3C of the recording paper mounting plate 3 engages with the engagement guide groove 4b of the guide member 4, and after movement reaches the groove end 4d and stops. The guide member 4 has a shaft portion 4 as shown in FIG.
The engagement protrusion 4c is slidably engaged with the U-shaped notch 1b and is biased downward by the coil spring 7, so that it engages the guide member 4. The recording paper mounting plate 3 is biased so that its leading end 3e approaches the second delivery roller 9. When the recording paper placement plate 3 is stopped and positioned at the above-described position, the recording paper sent out from the placement position by the first delivery roller 8 is moved into the vicinity of the leading end 3e and the second delivery roller 9. When the recording paper passes through the section, the second delivery roller 9 comes into pressure contact with the recording paper, and a conveying force is reliably applied. The leading end 3e of the recording paper mounting plate 3 serves as a shield that separates the recording paper on the paper cassette 20 from the second delivery roller 9, which also serves as a delivery roller for automatic paper feeding by the paper cassette 20. It also functions as a member, and is configured so that automatic paper feeding by the paper feed cassette 20 cannot be performed during manual paper feeding. When the manual paper feeding operation is completed and the recording paper guide plate 2 is rotated counterclockwise in the figure, the bent portion 3d of the recording paper mounting plate 3 is attached to the hook portion 2a of the recording paper guide plate 2 as a result of this rotation. The recording paper is engaged and pulled, and moves rearward in the recording paper transport direction along the retaining guide groove 4b of the guide member 4 as if being pulled out from inside the apparatus. Then, the recording paper guide plate 2 stands up and enters the retracted state. The leading end 3e of the recording paper mounting plate 3 releases the shielding state between the second feed roller 9 and the recording paper on the paper feed cassette 20, so that automatic paper feeding by the paper feed cassette 20 becomes possible. When an operation signal synchronized with the start of the recording operation of the recording device is sent to the electromagnetic solenoid 15, the electromagnetic solenoid 15 is energized and the actuating piece 15a engages the engagement pawl 13c of the spring clutch 13.
distance from. As shown in FIGS. 6(A) and 6(B), the spring clutch 13 has a spring 13b that is connected to an engaging pawl 13c.
When the boss 14a of the connecting member 14 is released, the boss 14a of the connecting member 14 is tightened.
The cam member 12 and the gear G1° are in a connected state. The cam member 12 rotates once, and the actuating piece 15a again engages the spring clutch 1.
It engages with the engagement claw 13c of No.3. The spring 13b is the boss portion 14
Although it attempts to rotate with a tightened, the rotation is prevented by the actuating piece 15a engaged with the engaging claw 13c. At this time, a force that relaxes the spring 13b acts on one end of the spring 13b that is locked to the spring clutch body 13a, and the spring 1
3b releases the tightening of the boss portion 14a. In this way, gear G
,. The driving force is cut off, and the cam member 12 stops. As shown in FIG. 5, the lever member 16 slides in contact with the cam surface of the cam member 12 when it rotates once. When the cam member 12 is stopped, the lever member 16 is in contact with the recessed portion of the cam surface, so that the lever member 16 rotates clockwise in the figure and stops. The swinging member 17 similarly rotates clockwise in the figure and stops. Then, the push-up plate 5 rotates downward in the figure and stops. As a result, when the cam member 12 is stopped, the push-up plate 5 is retracted from the rectangular notch hole 3a of the recording paper mounting plate 3 shown in FIG. When the cam member I2 starts rotating, the contact portion of the lever member 16 reaches the convex portion of the cam surface as the cam member I2 starts rotating. While this protrusion continues, the lever member 16 is stopped at a position rotated counterclockwise in the figure. During this time, the end portion of the swinging member 17 is also pulled through the elastic member 18 and stops at a position rotated counterclockwise in the figure. The push-up plate 5 is connected to this swinging member 17.
As it rotates, it rotates so that its tip is positioned upward and then stops. The push-up plate 5 can be retracted from the rectangular notch hole 3a of the recording paper mounting plate 3 shown in FIG. As shown by the one-dot chain line, it is in a state of protruding from the notch hole 3a. A plurality of recording sheets placed on the recording sheet mounting plate 3 and having their front ends regulated by the stopper portion 3b are pushed up by the push-up plate 5, and the uppermost layer of recording sheets comes into pressure contact with the first delivery roller 8. . This press-contact state continues for one rotation of the cam member 12, and when the first delivery roller 8 is rotated in synchronization with the recording operation of the recording apparatus during the press-contact state, the recording paper is sent out. With this configuration, the state of pressure contact between the first delivery roller and the recording paper continues for a relatively long time, and it is only necessary to operate the first delivery roller while the state of pressure contact continues. There is no need for strict synchronization between operations, resulting in a simple device structure. The above operations are intermittently repeated in conjunction with the recording operation of the recording device. As shown in FIG. 1, when the tip of the push-up plate 5 is pushed up by the intermittent rotation of the cam member 12, it is pushed up to a position approximately equal to the upper end position of the stopper portion 3b of the recording paper mounting plate 3. A plurality of recording sheets placed on the sheet can smoothly pass over the stopper part 3b up to the lowest layer. The pressing force between the recording paper and the first delivery roller 8 is adjusted by the elastic member 18 so that it is always constant. That is, the pressure contact force based on the traction force of the lever member 16 against the recording paper placed on the recording paper mounting plate 3 is
8, a constant pressing force determined only by the tensile force of the elastic member 18 always acts between the recording paper and the first delivery roller 8.

【Effect of the invention】

As explained above, according to the present invention, when the recording paper mounting plate moves forward in the recording paper conveying direction in conjunction with the up-and-down movement of the recording paper guide plate, the leading end of the recording paper mounting plate moves toward the feed-out roller. Automatic paper feeding is prevented by blocking the pressure contact between the recording paper and the recording paper in the paper feed cassette, and the push-up plate that pushes up the recording paper is configured so that it can come out and retract from the notch hole of the recording paper placement plate only at this time. Therefore, it is possible to provide a manual sheet feeding device that allows switching between manual sheet feeding and automatic sheet feeding with a simple operation, and has a simple and inexpensive mechanism that provides a reliable feeding effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the manual paper feeding device according to the present invention set to enable manual paper feeding, FIG. 2 is a sectional view showing the device in a retracted state where manual paper feeding is not possible, and FIG. 3 4 is a perspective view showing the relationship between the recording paper placement plate, the guide member, and the push-up plate; FIG. 4 is a front view showing the driving force transmission means of the device;
Figure 5 is a perspective view showing the operating state of the push-up plate, and Figure 6 (A
) and (B) are front and side cross-sectional views of the clutch member, illustrating the intermittent operation of the cam member. l...Device body 2...Recording paper guide plate 3.
...Recording paper placement plate 3a...Notch hole 4...Guiding member 4b...Retaining guide groove 4d...Groove end 5...Pushing plate 8...First delivery roller 9
...Second delivery roller

Claims (1)

[Claims] In a manual paper feed device that feeds paper after preventing automatic paper feeding by intervening a shield between the feed roller and the recording paper in the paper feed cassette, the recording paper guide plate that guides the manually fed recording paper is provided as described above. A recording paper mounting plate, which is pivotally attached to the main body of the manual paper feeder and can be raised and lowered freely, allows a recording paper mounting plate on which the guided recording paper is placed to be freely movable in the recording paper transport direction in conjunction with the raising and lowering movement of the guide plate. A push-up plate for pushing up the recording paper placed thereon and pressing it against the feed roller is provided so as to be retractable from a notch in the recording paper mounting plate, and the recording paper mounting plate is connected to the recording paper guide plate. When the recording paper is moved forward in the transport direction in conjunction with the up-and-down movement of the mounting plate, the tip of the mounting plate acts as the shield to prevent automatic paper feeding by the paper feed cassette, and the push-up plate A manual paper feeding device characterized in that it is configured to be able to come out and go out from the notch hole.