JP3677913B2 - Sheet body discharging device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet discharging apparatus that discharges a recording sheet that has been recorded in a facsimile apparatus or the like, a read original that has been read, and the like.
[0002]
[Prior art]
A conventional sheet body discharging device provided in a facsimile machine or the like includes a plurality of driving rollers and a plurality of free rollers opposite to the driving rollers, and a recording is completed between the driving rollers and the free rollers. By passing the recording paper or the read original document that has been read, the rotational force of the driving roller is transmitted to the recording paper or the read original document and discharged.
[0003]
[Problems to be solved by the invention]
By the way, the conveyance path of the recording paper or the read original in the facsimile apparatus or the like is relatively small when it is in a straight line, and is generally abruptly curved to change the direction. Thus, the recording paper or the read original is bent and discharged in a curled state.
[0004]
In particular, when recording is performed using a thermal printer or a laser printer, a heater is used to melt the ink on the ink ribbon or to fix the toner transferred onto the recording paper. Because the recording paper is bent by the, the recording paper is easily curled.
[0005]
However, in the conventional sheet discharging apparatus, the driving roller and the free roller are opposed to each other, so that the curl of the recorded recording paper or the read original that has been read cannot be removed. The paper or the read original is curled and stacked on the support member, which causes a problem that the number of sheets that can be stocked is reduced.
[0006]
The present invention has been proposed in view of the above-described points. When the recording paper is discharged , the recorded recording is performed without adversely affecting the printing performance and without damaging the recording paper. It is an object of the present invention to provide a sheet body discharge device that can reduce curling of a sheet body such as a sheet or a scanned read document.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a sheet body discharging apparatus according to a first aspect of the present invention is a sheet body discharging apparatus that discharges a sheet body that has been transported through a non-linear transport path by a transporting means. a plurality of drive rollers for moving the sheet to the discharge direction in contact with the one main surface, in the vicinity of the two drive rollers abutting both ends in the width direction of the sheet member, the sheet member with respect to the drive roller Are arranged opposite to each other with an interval larger than the thickness of the sheet, and are arranged opposite to each other between two pressing members that abut against the other main surface of the sheet body and press the sheet body toward the drive roller, and an intermediate portion between the adjacent drive rollers. And a pressing member that presses the sheet member in contact with the other main surface of the sheet member.
[0008]
According to this sheet body discharging apparatus, the pressing member disposed opposite to the intermediate portion of the driving rollers adjacent to each other contacts the other main surface of the sheet body and presses the sheet body. Since the sheet body passing between the two is deformed so that the cross-sectional shape in the direction orthogonal to the discharge direction, that is, the width direction becomes a waveform, the cross-sectional shape in the discharge direction, that is, the longitudinal direction becomes a curve. Thus, curling of the curled sheet body can be satisfactorily reduced. In addition, a pressing member that is disposed near the driving roller with a gap larger than the thickness of the sheet member, and that presses the sheet member against the driving roller by contacting the other main surface of the sheet member. Since it is arranged, the contact state between the driving roller and the sheet body can be secured satisfactorily, so that the rotational force of the driving roller can be transmitted to the sheet body satisfactorily. For example, when recording paper is discharged, printing performance is adversely affected. And the recording paper is not damaged.
[0009]
According to a second aspect of the present invention, there is provided a sheet body discharging apparatus according to the first aspect, wherein the sheet body is a recording sheet on which an image is recorded in the conveyance path.
[0010]
According to the sheet discharging apparatus, in addition to the effect of the sheet discharging apparatus according to the first aspect, curling of the recording paper that is strongly curled in the high temperature atmosphere by the printer in the transport path can be reduced well.
[0011]
Furthermore, a sheet body discharging apparatus according to a third aspect of the invention is the sheet body discharging apparatus according to the first or second aspect, wherein two drive rollers are provided, and the pressing member is 2 Opposed to the center of each drive roller.
[0012]
According to this sheet body discharging apparatus, in addition to the effect of the sheet body discharging apparatus according to claim 1 or 2, the pressing member is disposed opposite to the center of the two drive rollers. The cross-sectional shape in the direction orthogonal to the discharge direction, that is, the cross-sectional shape in the width direction becomes a symmetrical waveform, and the whole is handled almost uniformly, so the curl reduction effect can be further enhanced.
[0013]
According to a fourth aspect of the present invention, there is provided the sheet body discharging apparatus according to any one of the first to third aspects, wherein the drive roller is in contact with one main surface of the sheet body. It has a hollow large-diameter portion made of an elastic body in contact therewith.
[0014]
According to this sheet body discharging apparatus, in addition to the effect of the sheet body discharging apparatus according to any one of claims 1 to 3, the driving roller is made of an elastic body that comes into contact with one main surface of the sheet body. Since the rotating large-diameter portion of the driving roller flexibly abuts against the sheet body and applies a force in the discharging direction to the sheet body, Damage to the sheet body can be prevented well.
[0015]
Furthermore, a sheet body discharging apparatus according to a fifth aspect of the present invention is the sheet body discharging apparatus according to any one of the first to third aspects, wherein the drive roller is in contact with one main surface of the sheet body. A plurality of protrusions made of an elastic body are in contact.
[0016]
According to this sheet body discharging apparatus, in addition to the effect of the sheet body discharging apparatus according to any one of claims 1 to 3, the driving roller is made of an elastic body that comes into contact with one main surface of the sheet body. Since the protrusions of the rotating driving roller flexibly contact the sheet body and give a force in the discharging direction to the sheet body, the sheet body is damaged by the driving roller. It can prevent well.
[0017]
According to a sixth aspect of the present invention, there is provided a sheet body discharging apparatus according to any one of the first to fifth aspects, wherein the pressing member and the pressing member are rotatably supported. It consists of free rollers.
[0018]
According to this sheet body discharging apparatus, in addition to the effect of the sheet body discharging apparatus according to any one of claims 1 to 5, the pressing member and the pressing member are composed of free rollers that are rotatably supported. Therefore, the pressing member, the pressing member, and the sheet body do not rub against each other firmly, and the damage to the sheet body by the pressing member and the pressing member can be satisfactorily prevented.
[0019]
Further, the sheet body discharging apparatus according to the invention described in claim 7 is the sheet body discharging apparatus according to claim 6, wherein the other main surface of the sheet body is a recording sheet on which an image is recorded in the transport path. It is a recording surface.
[0020]
According to this sheet body discharging apparatus, in addition to the effect of the sheet body discharging apparatus according to claim 6, since the other main surface of the sheet body is the recording surface of the recording paper, the recording surface of the recording paper by the pressing member Can be prevented well.
[0021]
The sheet discharging apparatus according to an eighth aspect of the present invention is the sheet discharging apparatus according to any one of the first to seventh aspects, wherein the sheet is formed by the plurality of drive rollers and the pressing member. The sheet body is pressed against a tray for discharging the body so that the sheet body is bent in a direction opposite to the bending direction in the non-linear conveyance path.
[0022]
According to this sheet body discharge device, in addition to the effect of the sheet body discharge device according to any one of claims 1 to 7, the sheet body conveyed through the non-linear conveyance path is used as a discharge tray. When the sheet body is sent out and pressed against the tray, the sheet body is bent in a direction opposite to the bending direction in the conveyance path, and thus the curling of the sheet body can be reduced well. Therefore, the number of sheet bodies stacked on the tray is not reduced, and the sheet bodies are stacked in an orderly manner on the tray.
[0023]
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
[0030]
FIG. 1 is an external perspective view of a facsimile machine provided with a sheet discharging apparatus according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. The housing body 3 and a lid body 4 rotatably attached to the housing body 3 are configured. An operation / display unit 5 provided with various key switches and a liquid crystal display device, an unread document tray 6 that can support 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 slot 7 is provided. The lid 4 is provided with an already-recorded sheet tray 8 capable of supporting a plurality of recorded recording sheets, a recording sheet discharge port 9 for discharging recorded recording sheets, and the like. The recorded paper tray 8 constitutes a part of a cylindrical protective cover 12 surrounding the unrecorded recording paper, and the horizontal sectional shape of the protective cover 12 is a flat quadrangle. As will be described in detail later, the protective cover 12 is provided with an unrecorded sheet tray capable of supporting a plurality of unrecorded recording sheets, a recording sheet insertion slot for inserting unrecorded recording sheets, and the like.
[0031]
As shown in FIG. 4, the unread document tray 6 is supported at its lower end by a pin 13 so as to be rotatable within a predetermined range, and the pin 13 is supported by the housing body 3. 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 an inclined surface 6a that is inclined with respect to the horizontal plane. The pre-recorded paper tray 8 has an inclined surface 8 a that faces the unread document tray 6 and is substantially parallel to the inclined surface 6 a of the unread document tray 6. Inside the protective cover 12, there are provided an unrecorded sheet tray 10 capable of supporting a plurality of unrecorded recording sheets and a recording sheet insertion slot 11 into which an unrecorded recording sheet is inserted. Reference numeral 10 denotes an inclined surface 10 a that faces the recorded paper tray 8 and is substantially parallel to the inclined surface 6 a of the unread document tray 6.
[0032]
A plurality of read originals 16 to be read supported by the unread original tray 6 are guided by a guide member (not shown), are turned by a non-shown arm, and are taken out one by one by a take-out roller 17, and an image sensor 18. The image sensor 18 reads the image line by line, feeds it line by line by the platen roller 19 in synchronism with the image sensor 18, and feeds it from the read document discharge port 22 by the discharge rollers 20 and 21. It is discharged outside the housing 2. The read document discharge port 22 is formed in the housing body 3.
[0033]
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 is sandwiched between a print head 28 and a platen roller 29, and an image is printed line by line by the print head 28. In synchronization with this, the platen roller 29 feeds out one line at a time, and the drive roller 30 and free roller 31a discharge the recording paper discharge port 9 to the outside of the housing 2. An 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.
[0034]
As shown in FIG. 5, two drive rollers 30 are provided at a predetermined interval in the axial direction. These two drive rollers 30 are metal installed in the vicinity of both side walls of the housing 2. It is fitted and fixed to a rotating shaft 34 that is rotatably supported by the frames 33a and 33b. One end portion of the rotating shaft 34 protrudes from the frame 33 a toward the left side wall of the housing 2, and rotational force is transmitted to the driving roller 30 through the rotating shaft 34 to one end portion of the rotating shaft 34. A gear 35 is fitted and fixed. As shown in FIG. 5, three free rollers 31a and 31b are provided at regular intervals in the axial direction, and these three free rollers 31a and 31b are rotatably fitted to the shaft body 36. Match. The shaft body 36 is supported by a fixing member 37 attached to the frames 33a and 33b.
[0035]
Of the three free rollers 31a and 31b, the two free rollers 31b on both ends are disposed to face the drive roller 30 at a predetermined interval as shown in FIG. 6, and the free roller 31a on the center side. Are arranged at equal distances from the two drive rollers 30. That is, the distance between the two free rollers 31b on both ends and the driving roller 30 facing the two free rollers 31b is sufficiently larger than the thickness of the recording paper 25, and the free roller 31a on the central side has two free rollers on both ends. It is arranged at a position equidistant from 31b.
[0036]
As shown in FIG. 7, each drive roller 30 has a small-diameter portion 30 a fitted to the rotation shaft 34, an outer diameter larger than the outer diameter of the small-diameter portion 30 a, and an inner diameter larger than the diameter of the rotation shaft 34. The large-diameter portion 30b is constituted by a large-diameter portion 30c positioned between the small-diameter portion 30a and the large-diameter portion 30b. The small-diameter portion 30a, the large-diameter portion 30b, and the large-diameter portion 30c are: It is molded integrally with an elastic body such as rubber. Each free roller 31a, 31b is integrally molded by an elastic body such as rubber. The drive roller 30 abuts on the surface opposite to the recording surface of the recording paper 25. The free rollers 31 a and 31 b are in contact with the recording surface of the recording paper 25.
[0037]
In other words, the recording paper 25 constitutes a sheet member that is transported along a non-linear transport path by the transport means. Of the three free rollers 31a and 31b, the central free roller 31a is disposed opposite to an intermediate portion of the drive roller 30 adjacent to each other, and abuts against the other main surface of the recording paper 25, that is, the recording surface. A pressing member that presses the paper 25 is configured. Two free rollers 31b on both ends of the three free rollers 31a and 31b are disposed in the vicinity of the drive roller 30 and come into contact with the recording surface of the recording sheet 25 so that the recording sheet 25 is moved to the driving roller 30 side. The pressing member which presses to is comprised. The recorded paper tray 8 constitutes a support member having a support surface that supports the recording paper 25. The inclined surface 8 a of the already recorded paper tray 8 constitutes a support surface that supports the recording paper 25. The driving roller 30 and the free rollers 31a and 31b feed the recording paper 25 toward the already-recorded paper tray 8 and press it against the inclined surface 8a, thereby causing the recording paper 25 to be in a direction opposite to the bending direction in the transport path. A feed device that bends into two is configured.
[0038]
Next, the main points of the operation of the facsimile apparatus 1 configured as described above will be described. When unrecorded recording paper 25 is inserted into the protective cover 12 from above, the recording paper 25 is supported one by one by the unrecorded paper tray 10 and prevented from falling over, and is taken out one by one by the take-out roller 27, and the platen roller 29, the image corresponding to the image signal is recorded line by line by the print head 28 while being fed line by line by the print head 28, guided by a guide member (not shown), and the recording paper discharge port by the driving roller 30 and the free rollers 31a and 31b. 9 is discharged. At this time, as shown in FIG. 6, the drive roller 30 and the free roller 31 a handle the cross-sectional shape along the width direction of the recording paper 25 so as to have a waveform, and in a high temperature atmosphere by the print head 28 in the conveyance path. Curling of the bent recording paper 25 is reduced. That is, since the recording surface of the recording paper 25 is pressed by the central free roller 31a of the three free rollers 31a and 31b, the cross-sectional shape along the width direction of the recording paper 25 is not a simple arc. In this way, the recording paper 25 is handled in a waveform and curling is reduced.
[0039]
Further, since the recording paper 25 is pressed against the driving roller 30 by the two free rollers 31b on both ends of the three free rollers 31a and 31b, the frictional force between the recording paper 25 and the driving roller 30 is good. And the rotational force of the drive roller 30 is well transmitted to the recording paper 25, and the recording paper 25 is discharged from the recording paper discharge port 9. At this time, the distance between the two free rollers 31b on both ends of the three free rollers 31a and 31b and the drive roller 30 is sufficiently larger than the thickness of the recording paper 25, and the drive is made of an elastic body. Since the hollow large-diameter portion 30b of the roller 30 abuts on the recording paper 25, the recording paper 25 sandwiched between the platen roller 29 and the print head 28 is not forcibly pulled. There is no adverse effect, and the recording paper 25 is not damaged.
[0040]
Further, since the free rollers 31a and 31b are in contact with the recording surface of the recording paper 25, the recording surface of the recording paper 25 is damaged by excessive friction as in the case where the fixed member is in contact with the recording surface of the recording paper 25. There is no such thing as getting dirty or dirty.
[0041]
Further, as shown in FIG. 4, the recording paper 25 is discharged toward the inclined surface 8a of the recorded paper tray 8 by the drive roller 30 and the free rollers 31a and 31b. By being in contact with the inclined surface 8a, the bending is performed in the direction opposite to the direction bent in the conveying path. Therefore, also from this, curling of the recording paper 25 can be reduced well.
[0042]
In this way, curling of the recording paper 25 is reduced, and the recorded recording paper 25 can be supported in an orderly manner on the inclined surface 8a of the recorded paper tray 8, so that the recording paper 25 can be supported on the inclined surface 8a of the recorded paper tray 8. The number of sheets of recording paper 25 increases. Further, since curling is reduced, the leading end of the recording paper 25 is bent toward the non-recording paper tray 10 and touches the unrecorded recording paper 25 on the inclined surface 10a of the non-recording paper tray 10, thereby causing unrecorded recording. The paper 25 is not soiled or dragged into the recording paper insertion slot 11 together with the unrecorded recording paper 25. Moreover, since curling is reduced, the leading end of the recording paper 25 being discharged falls toward the unread document tray 6 and covers the unread document tray 6, and the recording paper 25 is recorded on the recorded paper tray 8 when discharging is completed. The inclined surface 8a and the inclined surface 6a of the unread document tray 6 are not straddled.
[0043]
In the above embodiment, the driving roller 30 having the hollow large-diameter portion 30b is used. However, as shown in FIGS. 8 and 9, the driving roller 30 is made of an elastic body such as rubber and has a plurality of protrusions on the outer peripheral surface of one end. A drive roller 41 having a projecting unit 41a may be used.
[0044]
Moreover, in the said embodiment, although the free roller 31b as a pressing member of the both ends side of the three free rollers 31a and 31b was made to oppose the drive roller 30, it is not necessary to make it oppose and it is free as a pressing member. The recording paper 25 may be brought into contact with the driving roller 30 by positioning the roller 31b in the vicinity of the driving roller 30.
[0045]
Furthermore, in the said embodiment, although free roller 31a, 31b was used as a pressing member and a pressing member, one or both of a pressing member and a pressing member may be a fixed member.
[0046]
In the above embodiment, the recording paper 25 is discharged using the driving roller 30 and the free rollers 31a and 31b. However, the read document 16 may be discharged using the driving roller 30 and the free rollers 31a and 31b. .
[0047]
【The invention's effect】
As described above, according to the sheet discharging apparatus of the invention described in claim 1, the pressing member disposed opposite to the intermediate portion of the drive rollers adjacent to each other contacts the other main surface of the sheet and the sheet Since the body is pressed, the sheet body passing between the driving roller and the pressing member is deformed so that the cross-sectional shape in the direction orthogonal to the discharge direction, that is, the width direction becomes a waveform, so that it can be handled. Further, curling of the sheet body curled so that the cross-sectional shape in the discharge direction, that is, the longitudinal direction becomes a curve can be favorably reduced. In addition, a pressing member that is disposed near the driving roller with a gap larger than the thickness of the sheet member, and that presses the sheet member against the driving roller by contacting the other main surface of the sheet member. Since it is arranged, the contact state between the driving roller and the sheet body can be secured satisfactorily, so that the rotational force of the driving roller can be transmitted to the sheet body satisfactorily. For example, when recording paper is discharged, printing performance is adversely affected. And the recording paper is not damaged.
[0048]
According to the sheet discharge device of the invention described in claim 2, in addition to the effect of the sheet discharge device according to claim 1, the recording paper that is firmly curled in the high temperature atmosphere by the printer in the transport path The curl can be reduced well.
[0049]
Further, according to the sheet discharging apparatus of the invention described in claim 3, in addition to the effect of the sheet discharging apparatus according to claim 1 or 2, the pressing member is provided at the center of the two drive rollers. Since they are arranged to face each other, the cross-sectional shape in the direction orthogonal to the sheet discharge direction, that is, the width direction has a symmetrical waveform, and the whole is handled almost uniformly, so that the curl reduction effect can be further enhanced. .
[0050]
According to the sheet discharging apparatus of the invention described in claim 4, in addition to the effect of the sheet discharging apparatus according to any one of claims 1 to 3, the driving roller is provided on one of the sheets. Since it has a hollow large-diameter portion made of an elastic body that abuts the main surface, the large-diameter portion of the rotating drive roller flexibly abuts the sheet body and exerts a force in the discharge direction on the sheet body. Therefore, it is possible to satisfactorily prevent the sheet body from being damaged by the driving roller.
[0051]
Further, according to the sheet discharging apparatus of the invention described in claim 5, in addition to the effect of the sheet discharging apparatus according to any one of claims 1 to 3, the drive roller is provided on one of the sheets. Since it has a plurality of protrusions made of an elastic body that comes into contact with the main surface, the protrusion of the rotating driving roller flexibly contacts the sheet body and gives a force in the discharging direction to the sheet body. Further, it is possible to satisfactorily prevent the sheet body from being damaged by the driving roller.
[0052]
According to the sheet discharge device of the invention described in claim 6, in addition to the effect of the sheet discharge device according to any one of claims 1 to 5, the pressing member and the pressing member are rotated. Since the free roller is freely supported, the pressing member and the pressing member do not rub against the sheet body firmly, and the sheet member can be prevented from being damaged by the pressing member and the pressing member.
[0053]
Furthermore, according to the sheet discharging apparatus of the invention described in claim 7, in addition to the effect of the sheet discharging apparatus according to claim 6, the other main surface of the sheet is the recording surface of the recording paper. Further, it is possible to satisfactorily prevent the recording surface of the recording paper from being damaged or soiled by the pressing member.
[0054]
According to the sheet discharge device of the invention described in claim 8, in addition to the effect of the sheet discharge device according to any one of claims 1 to 7, the sheet discharge device is conveyed along a non-linear conveyance path. By feeding the sheet body toward the discharge tray and pressing the sheet body against the tray, the sheet body is bent in the direction opposite to the bending direction in the transport path, so that curling of the sheet body can be reduced well. Therefore, the number of sheet bodies stacked on the tray is not reduced, and the sheet bodies are stacked in an orderly manner on the tray.
[0055]
[0056]
[0057]
[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.
4 is a schematic sectional view of the facsimile apparatus shown in FIG.
5 is a plan view of a discharge device provided in the facsimile apparatus shown in FIG. 1. FIG.
6 is an enlarged front view of a main part of the discharge device shown in FIG.
7 is a cross-sectional view of a driving roller provided in the discharging device shown in FIG.
FIG. 8 is a cross-sectional view of a drive roller in another embodiment.
FIG. 9 is a front view of the drive roller shown in FIG.
[Explanation of symbols]
8 Recorded paper tray 8a Inclined surface 25 Recording paper 29 Platen roller 30 Drive roller 30b Large diameter portion 31a, 31b Free roller 41 Drive roller 41a Projection

Claims (8)

A sheet body discharging apparatus that discharges a sheet body that has been transported through a non-linear transport path by a transport means,
A plurality of drive rollers that abut one main surface of the sheet body and move the sheet body in a discharge direction;
The other main surface of the sheet body is disposed in the vicinity of the two driving rollers that are in contact with both end portions in the width direction of the sheet body, with a distance larger than the thickness of the sheet body being provided with respect to the driving roller. Two pressing members that are in contact with the sheet and press the sheet body against the drive roller;
A sheet body discharging apparatus comprising: a pressing member that is disposed opposite to an intermediate portion of the drive rollers adjacent to each other and presses the sheet body in contact with the other main surface of the sheet body.   The sheet discharging apparatus according to claim 1, wherein the sheet is a recording sheet on which an image is recorded in the conveyance path. Two drive rollers are provided,
3. The sheet discharging apparatus according to claim 1, wherein the pressing member is disposed opposite to a center of the two drive rollers.   The sheet drive device according to any one of claims 1 to 3, wherein the driving roller has a hollow large-diameter portion made of an elastic body that comes into contact with one main surface of the sheet. .   The sheet drive device according to any one of claims 1 to 3, wherein the driving roller has a plurality of protrusions made of an elastic body that abuts on one main surface of the sheet.   The sheet pressing device according to any one of claims 1 to 5, wherein the pressing member and the pressing member are formed of a free roller that is rotatably supported.   The sheet body discharging apparatus according to claim 6, wherein the other main surface of the sheet body is a recording surface of a recording sheet on which an image is recorded in the conveyance path.   The sheet body is pressed against a tray for discharging the sheet body by the plurality of driving rollers and the pressing member so that the sheet body is bent in a direction opposite to a bending direction in the non-linear conveyance path. The sheet discharging apparatus according to any one of claims 1 to 7, wherein the sheet discharging apparatus is configured.

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