JPH1067455A - Paper sheet conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To neatly stack conveyed paper sheets. SOLUTION: A rotational guide body 34 is arranged in a discharging roller 28 in a document conveying path 5 for conveying a sending document P. A paper discharge tray 41 serving as a stacking part, is arranged below the downstream side of the discharging roller 28. A base plate part 35 serving as a guiding part, which is set horizontally when any sending document P is not placed, and a guiding part 37 directed downward on the upstream side of the base plate part 35 are arranged in the guide body 34. The base plate part 35 in the guide body 34 is turned downward with the rear end part P1 of the sending document P and is returned upward by means of its own self-weight when the sending document P passes over. The following sending document P is guided onto the previous sending document P, and as a result, the documents can be stacked neatly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sheet conveying apparatus for conveying and stacking sheets.

[0002]

2. Description of the Related Art Conventionally, for example, in a facsimile machine, a copying machine or the like, a paper transporting apparatus for sequentially transporting a plurality of papers and stacking and storing them on a tray has been used. In this type of paper transport apparatus, a transport roller that is rotationally driven is provided near the downstream end of the paper transport path that transports the paper, and is located below the downstream side of the transport roller. A tray on which sheets are stacked is provided.

[0003]

However, in the above-mentioned conventional configuration, the rear end of the sheet conveyed by the conveying roller may remain on the conveying roller or on the frame supporting the conveying roller. In this case, when the succeeding sheet is conveyed, the leading end of the succeeding sheet is inserted below the preceding sheet to disturb the page order, or the leading end of the succeeding sheet is moved to the trailing end of the preceding sheet. There is a problem that the sheet is pushed in contact with the sheet and the preceding sheet is dropped from the tray.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sheet conveying apparatus capable of orderly stacking conveyed sheets.

[0005]

According to a first aspect of the present invention, there is provided a sheet conveying apparatus, comprising: a conveying roller for conveying a sheet on a conveying path; A guide portion provided so as to be capable of returning, a return means for returning and rotating the guide portion to the predetermined position, and a lamination portion provided below the downstream side of the transport roller.

In this configuration, after the preceding sheet is conveyed, the guide section is rotated upward by the return means,
Subsequent sheets are successively guided above the preceding sheet, dropped onto the stacking section, and sequentially stacked.

According to a second aspect of the present invention, there is provided a sheet conveying apparatus.
In the paper transport device described above, the return means always biases the guide portion toward a predetermined position facing the transport path.

In this configuration, the urged guide portion quickly returns to the predetermined position facing the transport path after or almost after the sheet has passed, so that the subsequent sheet can be smoothly received. Can be

According to a third aspect of the present invention, there is provided a sheet conveying apparatus.
Or the return means is driven by the sheet conveyed on the conveyance path, and returns the guide portion to a predetermined position facing the conveyance path.

In this configuration, in the state where the succeeding sheet is conveyed, the guide section is surely returned to the predetermined position facing the conveyance path by the succeeding sheet, so that the succeeding sheet is surely positioned on the preceding sheet. It is guided upward.

According to a fourth aspect of the present invention, there is provided a sheet transport device.
In the paper transport apparatus described in the above, the return means projects to the transport path in a state where the guide part is rotated downward, and is pushed by a subsequent sheet to return and rotate the guide part to the upper side of the preceding sheet. It is provided with.

In this configuration, the succeeding sheet is reliably guided above the preceding sheet with a simple configuration.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sheet conveying device according to an embodiment of the present invention.

In FIG. 3, reference numeral 1 denotes a facsimile machine,
The facsimile apparatus 1 includes a case body 2, and inside the case body 2, a recording paper conveyance path (not shown) for conveying, for example, A4 standard recording paper, and a transmission original P as A4 standard paper, for example. A document transport path 5 is provided as a transport path for the document.

An electrophotographic printing unit including a paper feed tray 6, a photosensitive drum, a fixing roller, and the like provided on the rear upper side of the case body 2 along the recording paper conveyance path, and a front surface of the case body 2. A recording paper discharge port or the like formed with an opening is disposed. Then, the recording paper stacked and stored in the paper feed tray 6 is peeled off one by one and sent to the recording paper transport path, where the toner image is transferred from the photosensitive drum, and
After the toner image is heated and fixed by the fixing roller, the toner image is discharged to the recording paper discharge port side.

On the other hand, an operation panel 8 provided with a keyboard, a liquid crystal display, etc.,
And an upper cover 9 provided with an inclined document table 9a and an auxiliary document table 9b. On the lower side of the operation panel 8, a document insertion port 11 opened on the side of the document table 9 a and a document discharge port formed on the front surface of the case body 2 are formed.
Up to 12, a document transport path 5 is formed, and along this document transport path 5, a transmission unit 15 for reading a transmission document P is provided.

As shown in FIGS. 1 to 3, the transmission unit 15 includes an upper frame 21 and a lower frame 22 which are vertically arranged with the document conveying path 5 interposed therebetween. Contact scanner 24 and this contact scanner
White roller 25 facing document 24 via document feed path 5
A paper feed roller 26 provided near the document insertion slot 11,
Feed roller 27 provided upstream of contact scanner 24
And a discharge roller 28 as a transport roller provided downstream of the close contact scanner 24, and the like. The paper feed roller 26, feed roller 27, and discharge roller 28 are connected to a gear unit (not shown) and are driven to rotate. Also, the upper frame 21
Are provided with pinch rollers 31 and 32 facing the feed roller 27 and the discharge roller 28, respectively.

Further, a guide body 34 is swingably mounted on the shaft 28a of the discharge roller 28. That is, as shown in FIGS. 1 to 4, the guide body 34 includes a board portion 35 as a guide portion, and mounting pieces bent downward from both sides of the board portion 35, that is, both ends in the longitudinal direction. Part 36,
36, a guide portion 37 inclined downward from the upstream end of the substrate portion 35, and a rear edge portion bent downward from the downstream edge of the substrate portion 35 38 and the like are formed integrally by bending a single metal plate. Shaft holes 36a, 36a rotatably supported on the shaft 28a of the discharge roller 28 are formed in the mounting pieces 36, 36, and a rectangular opening 35a is formed in the substrate 35. Are formed. In a no-load state in which the shaft 28a is inserted into the shaft holes 36a, 36a, the guide body 34 is urged in the direction toward the upstream side by its own weight, and the board part 35 is almost Stopped in a horizontal position. On the other hand, when a load is applied, the shaft is supported so as to swing downward in a predetermined range on the downstream side. In the swinging state, a part of the peripheral surface of the discharge roller 28 is opened via the opening 35a. It protrudes above the board part 35.

The downstream end 22a of the lower frame 22
The upper surface is inclined downward toward the downstream side, and slightly protrudes downstream of the discharge roller 28 and the guide body 34.

Further, as shown in FIGS. 1 to 3, downstream of the document discharge port 12, a discharge tray 41 as a stacked portion is provided.
Is provided. The paper discharge tray 41 is formed so as to be slightly upwardly inclined toward the downstream side.

Next, the operation of transporting the transmission original P during transmission will be described.

First, the transmission originals P stacked and placed on the original table 9a are separated one by one by a paper feed roller 26 and drawn into the original conveyance path 5 from the original insertion slot 11. Then, the transmission document P is conveyed to the downstream side while being sandwiched between the feed roller 27 and the pinch roller 31 and between the discharge roller 28 and the pinch roller 32. When passing between the contact scanner
24 allows image data to be read.

Further, the transmission original P from which the image data has been read is conveyed downstream by the discharge roller 28 and the pinch roller 32, and is discharged from the document discharge port 12 onto the discharge tray 41 outside the apparatus. Has become.

The guide body 34 is, as shown in FIG.
When the transmission original P is not conveyed to the transmission unit 15, the substrate 35 is substantially horizontal, and the first transmission original P is conveyed along the upper surface of the substrate 35. And FIG.
As shown in the figure, the rear end P1 of the transmission original P is a discharge roller.
When passing between the pinch roller 32 and 28, the guide body 34
Is pushed by the rear end portion P1 of the transmission document P, and turns downward on the downstream side against the urging force of its own weight. Then, if the transmission document P falls on the lower paper discharge tray 41 from this state, the guide body 34 naturally rotates in the return direction, and the board portion 35 returns to a substantially horizontal state.

Further, the rear end P1 of the transmission original P is
, And remains on the upper side of the lower frame 22, the guide body 34 rotates in the return direction by the urging force of its own weight.

Here, when the subsequent second transmission document P is conveyed to the transmission unit 15, the second transmission document P
Is sent above the rear end P1 of the preceding transmission original P by the guide body 34, that is, the subsequent transmission original P
Are stacked on the upper side of the preceding transmission original P.

On the other hand, the rear end P1 of the transmission original P is
When it remains on the upper side, that is, above the lower frame 22, the guide body 34
Remains in a state of being rotated downward on the downstream side. When the guide body 34 is thus rotated, the guide portion 37 provided on the upstream side of the guide body 34 projects in a state inclined to the document conveying path 5. Here, when the subsequent second transmission document P is transported to the transmission unit 15,
The leading end portion P2 of the first transmission document P is guided by a guide portion 37 of the guide body 34.
, And slides on the guide portion 37 to be guided to the upper surface of the substrate portion 35. When the leading end P2 of the transmission document P is drawn between the discharge roller 28 and the pinch roller 32, as shown in FIG. The upstream portion of the substrate 35 is pushed downward, the guide body 34 rotates upward and rearward, and the substrate 35 returns to a horizontal state. In other words, the portion of the guide body 34 on the downstream side of the substrate unit 35 rotates upward and moves above the rear end P1 of the preceding transmission original P. In this state, the leading end P2 of the subsequent transmission document P is sent above the rear end P1 of the preceding transmission document P, that is, the subsequent transmission document P
Are stacked on the upper side of the preceding transmission original P.

Further, when the subsequent transmission original P is further conveyed, the state shown in FIG. 1 is again obtained, and the steps shown in FIGS. Is stably stacked on the upper side of the upper side.

As described above, according to the present embodiment, the guide body 34 that swings downward together with the rear end P1 of the transmission original P is provided, and the guide 34 is moved upward by the subsequent transmission original P. Since the return rotation is performed, the transmission originals P sequentially conveyed and discharged to the outside of the apparatus are sequentially and stably stacked on the discharge tray 41 without falling from the discharge tray 41 or disturbing the page order. (Stacked).

The guide body 34 is rotatably mounted on a shaft 28a of a discharge roller 28 located at the most downstream position of the sheet conveyance. There is no need to provide a mechanism or the like for transmitting the information, and an increase in manufacturing cost can be suppressed.

Although the above embodiment has been described with respect to the paper discharge tray 41 of the transmission original P of the facsimile apparatus 1, the present invention is not limited to the facsimile apparatus 1 but also includes a printer, a copying machine, and the like. The present invention can be applied to a device that conveys and stacks sheets, such as a discharge tray of printed recording paper, in addition to the discharge tray 41 of the document P.

Although the structure of the guide body 34 has been described as being integrally formed over substantially the entire width of the document conveying path 5, it is not necessary to form the guide body 34 over substantially the entire width of the document conveying path 5. The length dimension can be reduced.In this case, not only a single unit but also a plurality of units can be provided, and a plurality of members are combined, for example, the substrate unit 35 and the guide unit 37 are separately provided. It can also be formed. An opening 35a is provided in the substrate 35 of the guide body 34, and a part of the peripheral surface of the discharge roller 28 projects from the opening 35a onto the substrate 35. The discharge rollers 28 and the guide members 34 can be arranged alternately without providing the above.

Further, in the above embodiment, the guide member
34 is urged to the upstream side so that the board portion 35 is substantially horizontal at normal times, that is, in a no-load state,
It is also possible to adopt a configuration in which the substrate unit 35 is urged toward the downstream side by its own weight or the like, and the substrate unit 35 is rotated downstream (counterclockwise in FIG. 1) with no load and stopped in an inclined state. In this configuration, when the transmission document P is transported to the transmission unit 15, the transmission document P is
By contacting the guide portion 37 of 34 and pushing downward, and rotating the substrate portion 35, the leading end P2 of the succeeding transmission original P is guided above the rear end P1 of the preceding transmission original P. Thus, the transmission originals P can be sequentially and stably stacked on the discharge tray 41.

The guide body 34 is provided on the shaft 28 of the discharge roller 28.
a, and is biased using its own weight as the biasing means, but it can be swingable using a separate weight or a separate elastic means such as a spring body. You can also support it. Also, the shaft 28 of the discharge roller 28
An axis other than a may be used as the rotation axis, and when biased by a separate biasing means, it may be configured to be able to advance and retreat on a predetermined line in addition to the rotation.

[0035]

According to the paper conveying apparatus of the first aspect,
After the preceding sheet is conveyed, the guide unit is rotated upward by the return means, and the subsequent sheet is sequentially guided to the upper side of the preceding sheet. And can be laminated.

According to the paper transport apparatus of the second aspect, in addition to the effect of the first aspect, the return means constantly urges the guide section toward a predetermined position facing the transport path. After or almost after passing
It can quickly return to the predetermined position facing the transport path, and can smoothly receive the subsequent sheet.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects, in a state where the subsequent sheet is transported, the guide portion faces the transport path by the subsequent sheet. Therefore, the subsequent sheet can be reliably guided above the preceding sheet.

According to the paper transport apparatus of the fourth aspect, in addition to the effect of the third aspect, the return means projects into the transport path with the guide portion rotated downward, and is pushed by the subsequent paper. With the configuration including the guide portion for returning and rotating the guide portion above the preceding sheet, the subsequent sheet can be reliably guided above the preceding sheet with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a partially cutaway explanatory view showing an embodiment of a sheet conveying apparatus according to the present invention.

FIG. 2 is an explanatory view showing an operation of the sheet transporting apparatus according to the embodiment with a part cut away;

FIG. 3 is a side view in which a part of the facsimile apparatus provided with the paper transport device is cut away.

FIG. 4 is a perspective view of a transport roller and a guide body of the paper transport device.

[Explanation of symbols]

 5 Document Conveying Path as Conveying Path 28 Discharge Roller as Conveying Roller 35 Substrate as Guide 37 Guide 41 Discharging Tray as Stack P Transmitted Document as Paper

Claims (4)

[Claims] A conveying roller configured to convey a sheet in a conveying path; a guide portion provided adjacent to the conveying roller so as to be swingable downward together with the sheet from a predetermined position facing the conveying path; A sheet transport device comprising: a return unit configured to return and rotate to a predetermined position; and a stacking unit provided below a downstream side of the transport roller. 2. The apparatus according to claim 1, wherein the return means constantly urges the guide portion toward a predetermined position facing the conveyance path.
Paper transport device according to the above. 3. The sheet conveying apparatus according to claim 1, wherein the return unit is driven by the sheet conveyed on the conveying path, and returns the guide unit to a predetermined position facing the conveying path. 4. The return means includes a guide section which projects into the conveyance path in a state where the guide section is rotated downward, is pushed by a succeeding sheet, and returns and rotates the guide section above the preceding sheet. 4. The sheet conveying device according to claim 3, wherein: