JPH11255389A - Paper emerging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equip a recording paper conveying means which can prevent each recording paper emerged from the device body from causing a jam to enable stable paper emergence by a great quantity of recording sheets of paper stacked already on the paper emergence part and permit a user to install the recording paper conveying means easily. SOLUTION: A drive force transmitting mechanism to serve also as a fixing mechanism of a recording paper conveying means is configured so that a downward directed force A is applied in the engaging part of a paper emerging gear 41 with a coupling gear 42 under the operation and a force B is transmitted to a frame 31 including a leg 32 through a bracket 44, supporting shaft 45, holding frame, etc. Thus the fitting of an engaging piece 31a in a receptacle recess 47 is retained by the force B during the operation, and the whole paper emerging structure including the recording paper conveying means is secured onto an emergence tray 15 certainly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is called a wingless type, in which a paper discharge section from which recording papers are sequentially stacked and discharged is integrally provided without forming a protruding portion in the apparatus main body. The present invention relates to a paper discharge device which is applied to an apparatus and is particularly effective when mounted on a facsimile apparatus or a composite apparatus having a plurality of functions such as a facsimile apparatus and a copying machine.

[0002]

2. Description of the Related Art FIG. 7 is a structural view of a wingless type facsimile apparatus, wherein 1 is an apparatus main body of the facsimile apparatus, 2 is a photosensitive drum, 3 is a cleaning device, and 4 is a photosensitive drum 2 having a predetermined potential. 5 is an optical writing unit for scanning the photosensitive drum 2 charged by the charger 4 with laser light, and 6 is a visualization of an electrostatic latent image formed on the photosensitive drum 2 with toner. A developing device for supplying toner to the developing device 6;
Reference numeral 8 denotes a transfer roller in contact with the roller surface of the photosensitive drum 2;
Is a fixing device having a pressure roller and a heating roller, and 10 is
A paper feed cassette which accommodates recording paper S and is detachably attached to the apparatus main body 1, 11 is a pair of transport rollers for transporting the recording paper along a recording paper transport path, and 12 is a photosensitive drum 2. A pair of registration rollers for feeding the recording paper at the timing of image formation, a pair of discharge rollers 13 for discharging the recording paper out of the apparatus main body, and a pair 14 arranged before the pair of discharge rollers 13 for discharging the recording paper A paper ejection sensor 15 for detecting the main body 1
A discharge tray as a discharge section formed on the upper surface of
The recording paper discharged by the discharge roller pair 13 is stacked on the discharge tray 15.

A scanner unit 20 reads a document image and converts it into an image signal.
Transports the document set on the document setting tray 21 along the document transfer path, reads the document image by the reading sensor 22, and discharges the read document onto the upper discharge tray 23.

Next, an image recording operation on recording paper in the facsimile apparatus shown in FIG. 7 will be described.

[0005] A control unit (not shown) of the facsimile apparatus includes:
Upon receiving a call signal from the exchange, the communication circuit is closed, thereby connecting to a destination facsimile machine or the like via a telephone line. Thereafter, the control unit of the facsimile apparatus temporarily stores the image signal sent according to a predetermined protocol in the image memory, and loads the image signal corresponding to one page of the recording paper from the image memory to the page memory. A drive signal for the optical writing unit 5 is generated based on the image signal loaded in the page memory.

Further, the control unit of the facsimile apparatus rotates the photosensitive drum 2 in the direction of the arrow after starting the reception of the image signal, and charges the photosensitive drum 2 to a predetermined potential by the charger 4. The optical writing unit 5 outputs a laser beam corresponding to an image signal according to a drive signal from the control unit, scans the photosensitive drum 2 charged to a predetermined potential by the laser beam, and applies an electrostatic force to the photosensitive drum 2. Form a latent image. The developing device 6 thins the toner supplied from the toner magazine 7 on the developing roller in conjunction with the rotation of the photosensitive drum 2, and selectively attaches the toner to the electrostatic latent image on the photosensitive drum 2. This develops the electrostatic latent image into a toner image.

On the other hand, one sheet of recording paper S is separated and fed from the recording paper S stacked on the paper feeding cassette 10 by the rotation of the paper feeding roller 16 in the paper feeding cassette 10. This one sheet of recording paper S is conveyed along the recording paper conveyance path by the conveyance roller pair 11, and temporarily stops at a position where its leading end contacts the nip portion of the registration roller pair 12. The registration roller pair 12 restarts the conveyance of the recording paper S at the timing when the leading end of the toner image on the photosensitive drum 2 reaches a predetermined position. Then, the transfer roller 8 transfers the toner image on the photosensitive drum 2 to the recording paper S at a transfer position where the recording paper S fed by the registration roller pair 12 is sandwiched together with the photosensitive drum 2.

The recording paper S onto which the toner image has been transferred is separated from the photosensitive drum 2 by a separation claw (not shown) or the like, and is conveyed to the fixing device 9. The fixing device 9 applies the fixing heat to the toner image under pressure to form the toner image on the recording paper S.
Established in The recording paper S is discharged from the inside of the apparatus main body 1 onto the discharge tray 15 by the discharge roller pair 13.

The control unit of the facsimile apparatus sequentially loads the image signals stored in the image memory into the page memory in the order of pages, and keeps the image signals until all the images based on the received image information are recorded on the recording paper S. The forming operation is repeated. Therefore, the recording paper S is sequentially discharged onto the discharge tray 15 in such a manner that the recording paper S is stacked by the discharge roller pair 13.

The facsimile apparatus as shown in FIG. 7 is designed to reduce the installation space, which has been strongly demanded in recent years.
1 so that the area for installing the apparatus is not increased,
1 does not protrude with respect to the apparatus body 1,
It is generally called a wingless type. Specifically, in this wingless type facsimile machine, the paper discharge tray 15,
Each of the trays 15 and 2 is set such that the projection area of the tray 23 and the document setting tray 21 is within the projection area of the apparatus main body 1.
The amount of protrusion from the apparatus main body 1 in 1 and 23 is regulated.

[0011]

In the conventional wingless type facsimile apparatus, the recording paper discharged to the discharge tray 15 when image formation is continued is sequentially stacked on the discharge tray 15. It is structured to be discharged as follows.

Normally, the facsimile apparatus is premised on receiving data in an unmanned state, and if a complete unmanned state continues for a long time, such as during a long vacation, a large amount of recording paper S
May be stacked on the paper discharge tray 15. In such an unmanned state, the recording paper S cannot be taken out of the paper output tray 15 as a matter of course, and sometimes the recording paper S already loaded on the paper output tray 15 is later discharged. There is a problem that the recording paper S discharged by the paper roller pair 13 causes a jam and the recording paper S is jammed, and the jam causes the reception failure.

In a facsimile apparatus that is not a wingless type, a plate-shaped (wing-shaped) paper discharge tray protruding from the apparatus main body is removed in advance before a long vacation or the like, and a cardboard box is provided below the paper discharge port of the apparatus main body. If a container such as the like is placed so as to increase the stacking amount, the stacking can be performed without scattering the discharged recording sheet S, and the recording sheet S may jam near the discharge port of the apparatus main body. Can be easily prevented. Similarly, in the conventional wingless type facsimile apparatus, the above problem is eliminated by increasing the loading amount of the recording paper. It is actually difficult to sufficiently increase the level difference from the discharge port for discharging the recording paper S to the discharge tray 15 in order to increase the recording paper S, and the recording paper S is stacked on the discharge tray 15 as described above. In this state, the recording paper is likely to be jammed.

By the way, in order to solve the above problem, for example, Japanese Patent Laid-Open No. 7-203118 discloses that when a recording paper conveyance abnormality such as a jam occurs, the recording paper is conveyed to another recording paper storage member. Is described. However, in the configuration of the facsimile apparatus, it is premised that the facsimile apparatus has a plurality of recording paper storage members. Therefore, as in the facsimile apparatus shown in FIG. It cannot be applied to those stacked on a single paper output tray 15.

Further, Japanese Patent Application Laid-Open No. Hei 8-277055 discloses that air is blown to a discharged recording sheet by a blower fan.
A copying machine having a configuration in which a recording sheet is separated so that a paper jam does not occur at a sheet discharge port even when the number of stacked sheets increases. However, in the configuration of this copying machine, even if the wind is sent, if the amount of recording paper loaded becomes large, the paper discharge port will be blocked, and as a result, the same problem as the above-mentioned conventional wingless type facsimile machine will occur. Having.

An object of the present invention is to provide a paper discharge device installed in a device having a wingless type facsimile function. A recording paper transporting means for preventing the recording paper ejected from the paper from jamming and enabling a stable paper ejection, and further enabling the user to easily install the recording paper transporting means. It is another object of the present invention to provide a paper discharge device.

[0017]

To achieve the above object, according to the present invention, a discharge unit for sequentially discharging recording paper is provided in a main body of an apparatus having a facsimile function. In a paper ejection device that is integrally installed without forming a protruding portion, a recording paper conveyance unit that conveys recording paper discharged to the paper ejection unit to the outside of the main body is detachably attached to the paper ejection unit. The recording paper transporting means comprises a transport belt for transporting the recording paper, and a drive roller and a driven roller for transmitting a driving force to the transport belt. A gear group for transmitting a rotational driving force from a driving source to the gear group. Fix With this configuration, a conveyance belt that conveys recording paper, a driving roller that transmits driving force to the conveyance belt, a driving roller, By installing the recording paper conveying means composed of driven rollers driven by the rollers, a large amount of recording paper does not remain stacked in the paper discharge unit, and the recording paper can be easily moved to an appropriate place. Therefore, occurrence of a jam can be prevented, and reliable output of all received documents can be performed. Moreover, by utilizing the rotational force of the gear for transmitting the rotational driving force to the recording paper transporting means, the recording paper transporting means can be securely and easily fixed to the paper discharge section.

According to a second aspect of the present invention, in the first aspect of the invention, the gear group includes a connecting gear that meshes with the drive gear, and a gear from the driving source that meshes with the connecting gear. It is a transmission gear for transmitting a driving force.

According to a third aspect of the present invention, in the second aspect, the transmission gear is a gear for driving a paper discharge roller for discharging the recording paper to a paper discharge part. It is characterized by having.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the fixing force presses at least a part of the support frame of the recording sheet transporting means against the sheet discharging section. With this configuration, the recording paper transporting means is ejected via a setting leg provided on the support frame and placed on the upper surface of the paper ejection section. It will be fixed to the paper section.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the support frame is provided with an engaging portion which is detachably engaged with a main body of the apparatus. With this configuration, the positioning is performed in the engagement state of the engagement portion while receiving the pressing force.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the following description, members corresponding to the members described with reference to FIG. 7 are denoted by the same reference numerals, and detailed description is omitted.

FIG. 1 is a block diagram of a wingless type facsimile apparatus for explaining an embodiment of the present invention.
FIG. 2A is a perspective view showing a sheet discharging device according to the embodiment, FIG. 2B is an enlarged view of a portion A in FIG. 2A, and FIG. 3 is a cross-sectional view showing a sheet discharging structure according to the embodiment. It is.

In the present embodiment, the paper discharge device includes a paper discharge roller pair 13 of discharge means for discharging recording paper S from the paper discharge port 1a of the apparatus main body 1 to the outside, and a paper discharge roller pair 13 from the paper discharge port 1a. The paper discharge structure 30 is configured to receive the recording paper S discharged by the printer and convey it in a predetermined direction as described later. The paper discharge structure 30 is detachably mounted on a paper discharge tray 15 as a paper discharge unit. Things.

In FIGS. 2 and 3, reference numeral 31 denotes a paper discharge structure 3;
A frame body for supporting each component constituting 0, 32 is a leg as a support means disposed at each corner on the lower surface of the frame body 31, and 33 is rotatably supported at a tip end of the frame body 31. A driven roller 34 is a driving roller rotatably supported at the rear end of the frame 31, and 35 is a transport belt stretched by the driven roller 33 and the driving roller 34, which is sufficiently higher than the recording paper S. It is formed of an elastic rubber or the like having a coefficient of friction.

The driven roller 33, the driving roller 34, and the transport belt 35 constitute a recording paper transport means 40 for transporting the discharged recording paper S to the outside of the apparatus main body 1. Further, reference numeral 36 denotes a belt tensioner which presses against the conveyor belt 35 to generate a constant tension, and 37 denotes a storage unit integrally formed with the frame body 31. In this storage unit 37, electrical components and the like are stored. I have.

The paper discharge structure 30 having the above-described structure is used in advance when a completely unmanned state such as a long vacation or the like continues for a long time, or when a large number of documents are to be received in a short time. It is set on a tray 15. The transport belt 35 is formed to be wider than the maximum size of the recording paper S on which a facsimile device can record a document image.
The length in the transport direction is set so as to overhang from the top to the front.

When the drive roller 34 rotates, the transport belt 3
5 is driven along an annular endless track to convey the recording paper S discharged from the paper discharge port 1a so as to fall out of the apparatus main body 1, and the discharge port of the apparatus main body 1 at the discharge roller pair 13 portion. The recording paper S is not stuck in the vicinity of the recording paper 1a, so that the recording paper discharged earlier does not cause an obstacle and the next recording paper is jammed. Therefore, all the received original images are properly output.

The transport belt 35 is connected to the discharge roller pair 13.
Is set to move in the transport direction (the direction of arrow F) at a linear speed slightly higher than the discharge speed of the recording paper S by the recording paper S, so that the recording paper S smoothly moves in a predetermined direction without staying at the discharge port 1a. The recording paper is conveyed.

The discharge structure 30 is placed on the discharge tray 15.
Is installed, as shown in FIG.
The paper output tray 15 on which the recording paper S transported by the printer 5 falls
By disposing the storage container C such as a cardboard box at a position below and in front of the recording paper S, scattering of the recording paper S can be prevented.

The paper discharge structure 30 is installed on the paper discharge tray 15 so that the recording paper conveyance direction of the conveyance belt 35 and the recording paper discharge direction of the paper discharge roller pair 13 are the same as described above, or for example, The recording paper S can be conveyed to an arbitrary position outside the apparatus main body 1 and dropped, since it can be installed on the paper discharge tray 15 so that both directions are different, for example, both directions are orthogonal.

FIG. 4 is a sectional view showing a main part for explaining a driving force transmitting mechanism and a fixing mechanism in the recording paper conveying means, FIG. 5 is a perspective view of the mechanism, and FIG. 6 is an example of a gear of the mechanism. FIG.

4 and 5, reference numeral 41 denotes a discharge gear fixed to the lower roller side of the discharge roller pair 13,
42 is a drive gear 43 fixed to the side of the drive roller 34
And 44, a bracket for receiving a support shaft 45 for supporting the drive gear 43 and the drive roller 34, and 46 for the support shaft 4 at the bracket 44 side.
5, the connecting gear 42 is provided rotatably on the holding frame 46 so as to mesh with the drive gear 43.

The drive gear 43 rotates clockwise to move the transport belt 35 by the drive roller 34. Therefore, the connection gear 42 meshing with the drive gear 43 rotates counterclockwise, and the paper discharge gear 41 rotates clockwise.

Paper discharge roller pair 13 in frame body 31
The end on the side extends into the apparatus main body 1 below the gear groups 41, 42, 43, and is formed with a locking piece 31 a that engages with a concave receiving recess 47 provided in the apparatus main body 1. I have.

When the paper discharge structure 30 on which the recording paper transport means 40 having the above structure is mounted is placed on the paper discharge tray 15, first, the locking piece 31a of the frame body 31 is moved to the main body 1 of the apparatus.
Of the frame body 31
Is placed on the paper discharge tray 15. In this state, the holding frame 4
6 is rotated toward the paper discharge gear 41 so that the connecting gear 42 meshes with the paper discharge gear 41.

For this reason, the frame body 31 is engaged with the respective gears and is positioned at a predetermined set position by the locking pieces 31a and the legs 32, so that the paper discharge structure 30 is immobile on the paper discharge tray 15. Will be fixed.

In a state where the gears are engaged as described above, if a drive source such as a motor (not shown) is started,
The rotational driving force is transmitted to a drive gear 43 via a paper discharge gear 41 for rotating the paper discharge roller pair 13 and a connection gear 42,
The drive roller 34 moves the transport belt 35. During this operation, as shown in FIG. 4, a downward force A exists at the meshing portion between the paper discharge gear 41 and the connection gear 42, and the component force of the force A causes the bracket 44, the support shaft 45, The force B is transmitted to the frame body 31 including the legs 32 via the holding frame body 46 and the like.

Therefore, during operation, the locking pieces 31a
Engagement between the sheet and the receiving recess 47 is maintained by the force B, and the entire sheet discharging structure 30 including the recording sheet conveying means 40 is securely fixed on the sheet discharging tray 15.

In this embodiment, the discharge gear 41 and the connecting gear 4
In No. 2, as described above, the force generated in the meshing portion is utilized by making the so-called bite of the gear freely. However, if the bite is simply taken into account, the contact between the gear tip and the tooth bottom occurs between the gears, and smooth gear rotation is not performed.

Therefore, in the present embodiment, as shown in FIG.
Has a structure in which a contact disk portion 50 equal to the diameter P of the pitch circle is provided, and when the gears are engaged with each other, the contact disk portions 50 are brought into contact with each other to maintain the inter-gear distance, so that the gears can be meshed. The configuration is performed at the position of the pitch circle, thereby preventing the above-described problem from occurring.

The holding frame body 46 in which the connecting gear 42 is rotatably provided so as to mesh with the driving gear 43,
In the figure, the recording paper conveying means 40 is installed on only one side, but it may be installed together with the paper discharge gear 41 on both sides.

[0043]

As described above, according to the present invention,
The paper discharge unit is provided with a transport belt that transports the recording paper, a driving roller that transmits a driving force to the transport belt, and a recording paper transport unit that is driven by a driven roller. Since a large amount of recording paper does not remain stacked in the copy section and the recording paper can be easily moved to an appropriate place, jamming can be prevented and all received documents can be output reliably. . Moreover, by utilizing the rotational force of the gear for transmitting the rotational driving force to the recording paper transporting means, the recording paper transporting means can be reliably and easily fixed to the paper discharge unit.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wingless type facsimile apparatus for describing an embodiment of the present invention.

FIG. 2 is a perspective view showing a sheet discharging device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a sheet discharge structure according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part for explaining a driving force transmitting mechanism and a fixing mechanism of the recording paper conveying means according to the embodiment of the present invention.

FIG. 5 is a perspective view of a driving force transmitting mechanism and a fixing mechanism of the recording paper conveying unit according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating an example of a gear of a driving force transmitting mechanism and a fixing mechanism according to an embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional wingless type facsimile machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Apparatus main body 1a Paper discharge port 13 Paper discharge roller pair 15 Paper discharge part 23 Upper paper discharge roller 30 Paper discharge structure 31 Frame body 31a Locking piece of a frame body 32 Leg 33 Follower roller 34 Drive roller 35 Transport belt 40 Recording Paper conveying means 41 Discharge gear 42 Connecting gear 43 Driving gear 46 Holding frame body 47 Receiving recess 50 Contact disk portion

Claims (5)

[Claims] 1. A paper discharging device in which a paper discharging unit from which recording paper is sequentially discharged is installed integrally with a main body of a device having a facsimile function without forming a projecting portion. A recording paper transport unit for transporting the recording paper discharged to the paper unit to the outside of the main body is detachably provided in the paper discharge unit, and the recording paper transport unit is driven by a transport belt that transports the recording paper, and a transport belt. A drive gear for transmitting a force, and a driven roller. The drive roller is provided with a drive gear, and the drive gear is provided with a gear group for transmitting a rotational drive force from a drive source. A sheet discharging device, wherein the direction of the rotational force at the gear meshing portion of the set is set such that the rotational force is a fixing force for fixing the recording sheet conveying means to the sheet discharging portion. 2. The gear group according to claim 1, wherein the gear group is a connecting gear that meshes with the driving gear, and a transmission gear that meshes with the connecting gear and transmits rotational driving force from a driving source. Paper ejection device. 3. The sheet discharging device according to claim 2, wherein the transmission gear is a gear for driving a sheet discharging roller for discharging the recording sheet to a sheet discharging unit. 4. The sheet discharging device according to claim 1, wherein the fixing force is used as a pressing force for pressing at least a part of a support frame of the recording sheet conveying unit against the sheet discharging unit. apparatus. 5. The paper discharge device according to claim 4, wherein said support frame is provided with an engagement portion detachably engaged with a main body of said device.