JPH10194543A - Sheet member ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a sheet member ejector without lowering its ejecting performance for sheet members. SOLUTION: A sheet member ejector, which ejects a read original 16 fed by a feed means along a feed path, comprises a free roller 21 held rotatable and vertically movable in a predetermined range, and a drive roller 20 arranged below the free roller 21, which is formed on its outer periphery with protrusions 20a at predetermined circumferential intervals and is rotated on the axis by a drive means to hold the read original 16 between itself and the free roller 21 and then eject the read original 16 from a read original ejection port 22 formed through the housing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device for discharging a read original or a recorded recording sheet in a facsimile machine or the like.

[0002]

2. Description of the Related Art A conventional sheet discharging device provided in a facsimile apparatus or the like has a configuration in which a sheet is sandwiched and discharged between a free roller and a driving roller. In order to secure the frictional force and reliably transmit the rotational force of the drive roller to the sheet member, the free roller is urged by a spring such as a coil spring and pressed against the drive roller.

[0003]

However, in the above-described conventional sheet discharging device, a spring for pressing the free roller against the driving roller is required, so that the number of parts and the number of assembling steps are increased, and the manufacturing cost is increased. There was a problem that.

[0004] The present invention has been proposed in view of the above points, and has as its object to provide a sheet discharging apparatus capable of reducing the manufacturing cost without deteriorating the discharging performance of the sheet.

[0005]

According to a first aspect of the present invention, there is provided a sheet discharging apparatus for discharging a sheet conveyed along a conveying path by a conveying means. A free roller supported rotatably and movably in a predetermined range in a vertical direction, and protruding portions protruding from the outer peripheral surface at predetermined intervals in a circumferential direction on the outer peripheral surface, the driving means And a drive roller for sandwiching the sheet body between the free roller and the sheet body and discharging the sheet body from a sheet body outlet formed in the housing.

According to this sheet discharging device, the free roller is supported movably in a predetermined range in the vertical direction, so that the sheet can be pressed against the driving roller by its own weight, and the driving of the sheet and the driving of the sheet can be performed. Since the frictional force between the roller and the roller can be appropriately secured, the sheet body can be satisfactorily discharged by the rotation of the drive roller. Further, since the projecting portions are provided at predetermined intervals in the circumferential direction on the outer peripheral surface of the driving roller, the trailing edge of the sheet body in the discharging direction enters between the adjacent projecting portions at the final stage of discharging, and the driving roller is driven. Since the trailing edge of the sheet body in the discharge direction is pushed in the discharge direction by the protrusion with the rotation of, the dischargeability of the sheet body can be more favorably secured. Furthermore, since a spring for urging the free roller is not provided, there is no increase in manufacturing cost due to an increase in the number of parts and the number of assembly steps.

The sheet may be paper such as plain paper or thermal paper, or may be a resin film.

The protruding portion of the drive roller may be provided so as to protrude over the entire length of the drive roller in the axial direction, or may be provided so as to partially protrude in the axial direction of the drive roller. Projections may be provided at predetermined intervals in the direction.

The drive roller and the free roller may be provided over the entire length in the width direction of the sheet, that is, in the direction perpendicular to the discharge direction, may be provided in a part of the width of the sheet, or may be further provided. May be provided at predetermined intervals along the width direction.

[0010] According to a second aspect of the present invention, there is provided the sheet discharging apparatus according to the first aspect, wherein the driving roller is made of an elastic material.

According to this sheet discharging device, claim 1 is provided.
In addition to the effects of the sheet discharging device described in the above, since the driving roller is made of an elastic body, the frictional force between the driving roller and the sheet is large, so that the sheet can be discharged more favorably. Due to the contact, damage to the sheet body can be favorably prevented.

According to a third aspect of the present invention, there is provided the sheet discharging apparatus according to the first or second aspect, wherein the sheet is configured to read an image by reading means in a transport path. This is the read original.

According to this sheet discharging device, claim 1 is provided.
Alternatively, in addition to the effect of the sheet discharging device according to the second aspect, since the read document that has been read can be satisfactorily discharged, a reading error due to a jam of the read document can be prevented.

According to a fourth aspect of the present invention, there is provided the sheet discharging apparatus according to the first or second aspect, wherein the sheet is formed of an image by a recording means in a transport path. This is the recording paper on which the recording was performed.

According to this sheet discharging device, claim 1 is provided.
Alternatively, in addition to the effect of the sheet discharging device according to the second aspect, since the recorded recording paper can be discharged well, it is possible to prevent a recording failure due to a recording paper jam.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view of an external appearance of a facsimile apparatus provided with a sheet discharging apparatus according to the present invention, FIG. 2 is a plan view of the facsimile apparatus, and FIG. The body 2 includes a housing body 3 and a lid 4 rotatably attached to the housing body 3. An operation / display unit 5 including various key switches and a liquid crystal display device, an unread document tray 6 capable of supporting a plurality of read documents to be read, and a read document to be read are inserted into the housing 2. A reading document insertion port 7 and the like are provided. The cover 4 is provided with a recorded paper tray 8 capable of supporting a plurality of recorded recording papers, a recording paper discharge port 9 for discharging the recorded recording papers, and the like. The recorded paper tray 8 has a cylindrical protective cover 12 surrounding unrecorded recording paper.
And the horizontal cross-sectional shape of the protective cover 12 is a flat quadrilateral. As will be described later in detail, an unrecorded paper tray capable of supporting a plurality of unrecorded recording papers, a recording paper insertion opening for inserting unrecorded recording papers, and the like are provided inside the protective cover 12.

As shown in FIG. 4, the unread document tray 6 has a lower end rotatably supported by a pin 13 within a predetermined range, and the pin 13 is supported by the lid 4. That is, the unread document tray 6 is rotatable from the state shown in FIGS. 1 to 4 to the operation / display unit 5 side. The surface of the unread document tray 6 opposite to the surface facing the recorded paper tray 8 is formed as an inclined surface 6a that is inclined with respect to a horizontal plane. The recording paper tray 8 has an inclined surface 8 a that is substantially parallel to the inclined surface 6 a of the unread document tray 6. An unrecorded paper tray 10 capable of supporting a plurality of unrecorded recording papers and a recording paper insertion slot 11 for inserting unrecorded recording paper are provided inside the protective cover 12. 10 is
The surface facing the already-recorded paper tray 8 is
The inclined surface 10a is substantially parallel to the inclined surface 6a. The plurality of originals to be read are supported by the inclined surface 6a of the unread original tray 6. The plurality of recorded recording sheets are supported by the inclined surface 8a of the recorded sheet tray 8. A plurality of unrecorded recording papers are stored in the unrecorded paper tray 1.
0 is supported by the inclined surface 10a.

A plurality of read documents 16 to be read supported by the unread document tray 6 are guided by a guide member (not shown), separated by a separating arm (not shown), and taken out one by one by a take-out roller 17. Image sensor 18
And a platen roller 19, the image is read line by line by the image sensor 18, and is sent out line by line by the platen roller 19 in synchronization with the image, and the read original is discharged by the drive roller 20 and the free roller 21. It is discharged from the outlet 22 to the outside of the housing 2. The read document discharge port 22 is formed in the housing body 3.

The unrecorded recording paper 25 supported by the unrecorded paper tray 10 is taken out one by one by a take-out roller 27, and a print head 28 and a platen roller 29 are taken out.
, The image is recorded line by line by the print head 28, and is sent out line by line by the platen roller 29 in synchronization with
The recording paper is discharged from the recording paper discharge port 9 to the outside of the housing 2 by the free rollers 31a. The ink ribbon 32 is sandwiched between the print head 28 and the platen roller 29 together with the recording paper 25, and the ink layer of the ink ribbon 32 contacts the recording surface of the recording paper 25.

The free roller 21 is made of resin and is integrally formed with the shaft 41 as shown in FIG. 5, and both ends of the shaft 41 are in the width direction of the back surface of the operation / display unit 5. The support member 42 is slidably and rotatably fitted into the long hole 43 attached to each end. Therefore, the free roller 21 is rotatable and can move up and down within the range of the length of the long hole 43. The drive roller 20 is
It is located below the free roller 21 and is fitted and fixed to the shaft body 44. On the outer peripheral surface of the drive roller 20, three protrusions 20a are provided at predetermined intervals in the circumferential direction along the axial direction, and these protrusions 20a extend over the entire length of the drive roller 20 in the axial direction. . Drive roller 20
Is integrally formed of rubber including the protruding portion 20a. Although not shown, both ends of the shaft body 44 are rotatably supported by frames disposed near both side walls of the housing body 3. The drive roller 20 is rotated in the direction of arrow A by a drive means (not shown) via a shaft 44, and the read document 16 sent out by the platen roller 19 and guided by the guide member 45 is brought into contact with the free roller 21. The paper is discharged in the direction of arrow B while being sandwiched therebetween. The drive roller 20 and the free roller 21 are arranged over the entire length of the read document 16 in the width direction, that is, the direction perpendicular to the discharge direction.

Next, the essential points of the operation of the facsimile machine 1 configured as described above will be described. The image 16 is read by the image sensor 18, and the read document 16 sent out by the platen roller 19 in synchronization with the image is guided by the guide member 45 and is sandwiched between the drive roller 20 and the free roller 21. In a state where the protruding portion 20a is turned upward by the rotation of the driving roller 20, as shown in FIG. 5, the free roller 21 is pushed upward by the protruding portion 20a, and the shaft 41 is inserted into the long hole 43 of the support member 42. The free roller 21 moves upward along with the free roller 21. In a state where the drive roller 20 further rotates and the intermediate portion between the adjacent protrusions 20a, 20a faces upward, as shown in FIG. 6, the free roller 21 fits between the adjacent protrusions 20a, 20a. The shaft 41 moves downward along the long hole 43 of the support member 42 by the weight of the free roller 21, and the free roller 21
Moves down.

In any of the above states, the own weight of the free roller 21 is received by the drive roller 20 via the read document 16. In other words, the read document 16 is constantly pressed against the drive roller 20 by the weight of the free roller 21. Therefore, the frictional force between the drive roller 20 and the read document 16 is always appropriately maintained, and
As a result of the rotation of the drive roller 20 being transmitted to the read document 16 satisfactorily, the read document 16 can be reliably moved in the direction of arrow B in FIG. In addition, since the read document 16 is not pressed against the drive roller 20 by a force exceeding the weight of the free roller 21, even when the rotation of the platen roller 19 and the rotation of the drive roller 20 are out of synchronization. In addition, the reading original 16 sandwiched between the platen roller 19 and the image sensor 18 is not forcibly pulled out by the driving roller 20 and the free roller 21, and stable reading quality can be secured. Further, the drive roller 20
Is made of rubber, and is softly in contact with the read original 16.
Is not damaged.

In the final stage of discharging the read original 16, FIG.
As shown in the figure, even if the read document 16 is no longer positioned between the drive roller 20 and the free roller 21,
The trailing edge of the read document 16 is pressed by the side surface of the zero protrusion 20a. Therefore, the read original 16 is placed in the read original outlet 2.
2 is reliably discharged to the outside of the housing body 3.

As described above, the reading document 16 can be satisfactorily discharged from the reading document discharge port 22 to the outside of the housing 2 by the driving roller 20 and the free roller 21. Therefore, no jam of the read document 16 occurs, and no idle feeding of the read document 16 by the platen roller 19 occurs. Therefore, erroneous reading such as double reading of the read document 16 by the image sensor 18 can be prevented. Further, since a spring for pressing the free roller 21 against the driving roller 20 is not necessary,
Since the number of parts and the number of assembly steps can be reduced, the manufacturing cost can be reduced.

In the above embodiment, the driving roller 20
Although the read document 16 is discharged by the and the free roller 21, the recording paper 25 may be discharged by the drive roller and the free roller having the same configuration.

[0027]

As described above, according to the sheet discharging apparatus of the first aspect of the present invention, the free roller is supported movably in a predetermined range in the vertical direction. Since the body can be pressed against the drive roller and a sufficient frictional force can be secured between the sheet body and the drive roller, the sheet body can be satisfactorily discharged by the rotation of the drive roller. Further, since the projecting portions are provided at predetermined intervals in the circumferential direction on the outer peripheral surface of the driving roller, the trailing edge of the sheet body in the discharging direction enters between the adjacent projecting portions at the final stage of discharging, and the driving roller is driven. Since the trailing edge of the sheet body in the discharge direction is pushed in the discharge direction by the protrusion with the rotation of, the dischargeability of the sheet body can be more favorably secured. Furthermore, since a spring for urging the free roller is not provided, there is no increase in manufacturing cost due to an increase in the number of parts and the number of assembly steps.

According to the sheet discharging device of the present invention, in addition to the effect of the sheet discharging device of the first aspect, since the driving roller is made of an elastic material, the driving roller is made of an elastic material. Since the frictional force between them is large, the sheet body can be discharged more favorably, and the sheet body can be satisfactorily prevented from being damaged because it comes into soft contact with the sheet body.

Further, according to the sheet discharging apparatus of the present invention, in addition to the effect of the sheet discharging apparatus of the first or second aspect, the read original which has been read is discharged well. As a result, it is possible to prevent a reading error due to a jam of the read document.

According to the sheet discharging apparatus of the present invention, in addition to the effect of the sheet discharging apparatus of the first or second aspect, the recorded recording paper is discharged favorably. As a result, it is possible to prevent a recording failure due to a recording paper jam.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a facsimile apparatus provided with an image reading and recording apparatus according to the present invention.

FIG. 2 is a plan view of the facsimile apparatus shown in FIG.

FIG. 3 is a side view of the facsimile apparatus shown in FIG.

FIG. 4 is a schematic sectional view of the facsimile apparatus shown in FIG.

FIG. 5 is an enlarged sectional view of a main part of the facsimile apparatus shown in FIG.

FIG. 6 is an enlarged sectional view of a main part of the facsimile apparatus shown in FIG.

FIG. 7 is an enlarged sectional view of a main part of the facsimile apparatus shown in FIG.

[Explanation of symbols]

 2 Case 16 Document to be read 18 Image sensor 19 Platen roller 20 Drive roller 20a Projection 21 Free roller 22 Document discharge port 25 Recording paper 28 Print head 45 Guide member

Claims (4)

[Claims] 1. A sheet discharging device for discharging a sheet conveyed along a conveying path by conveying means, comprising: a free roller rotatably supported movably in a predetermined range in a vertical direction; Are provided at predetermined intervals in the circumferential direction on the outer peripheral surface, and are rotated around the axis by driving means, so that the sheet body is sandwiched between the free roller and the free roller. And a drive roller for discharging the sheet from a sheet discharge opening formed in the housing. 2. The sheet discharging device according to claim 1, wherein the driving roller is made of an elastic material. 3. The sheet discharging device according to claim 1, wherein the sheet is a read document whose image has been read by a reading unit in the transport path. 4. The recording medium according to claim 1, wherein the sheet is a recording sheet on which an image is recorded by a recording unit in the transport path.
Alternatively, the sheet discharging device according to claim 2.