JP3002803B2 - Paper transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper conveying apparatus suitable for use in a facsimile original reading apparatus.

[0002]

2. Description of the Related Art A facsimile manuscript reading device and the like are provided with a manuscript conveying device. The manuscript set in a manuscript feeding unit is conveyed to the manuscript receiving unit by the manuscript conveying device, and the manuscript reading unit using an image sensor or the like is used. The original being transported was being read.

In general, a paper transport path in a paper transport apparatus for transporting paper such as a document is configured such that the paper is transported in one direction from a paper supply unit so that the paper is moved in a direction opposite to the paper supply unit. There is a method of discharging paper, and a method of discharging the paper conveyed from the paper supply unit after making a U-turn inside the apparatus body and returning it to the same side as the paper supply unit. Particularly, the latter method is a conventional method. Transporting the sheet obliquely downward from a sheet supply unit disposed on the upper surface of the apparatus main body, making a U-turn inside the apparatus main body, and then conveying the sheet obliquely upward;
2. Description of the Related Art There has been known a sheet transporting device which is adapted to reach a sheet receiving portion arranged on an upper surface portion of an apparatus main body (for example, see Japanese Patent Application Laid-Open No.
97874, etc.).

[0004]

However, the above-mentioned conventional paper transport apparatus has the advantages that the paper can be returned to the same side as the paper supply unit and the depth of the apparatus body can be made compact. Because of the U-turn operation, there are also the following problems.

First, since a mechanism and operation for opening a paper transport path when a paper jam occurs become complicated, troublesome jam clearance is required.

Second, since the jammed paper cannot be easily removed, the paper is easily damaged, such as tearing or wrinkling.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems existing in the prior art, and an object of the present invention is to provide a paper transporting apparatus capable of easily performing a jam clearance and eliminating the adverse effect of damaging the paper. And

[0008]

According to the present invention, an original (paper) is conveyed into the interior of the apparatus main body 2 from an original supply section (paper supply section) 3 disposed on the upper surface 2u of the apparatus main body 2, and the original is supplied to the apparatus main body 2. When the paper transporting apparatus 1 is configured to transport the original to a document receiving section (paper receiving section) 4 disposed on the upper surface 2u of the apparatus main body 2 after making a U-turn inside, the document is particularly forward and downward from the document supply section 3. And a U-turn at the front end of the apparatus main body 2, and then a document conveying path (paper conveying path) R for conveying the paper upward and to the document receiving section 4 is provided.
The upper transport path Ru is disposed on the upper surface 2u of the
Cover portion 5 that can be opened, and front portion 2f of device body 2
And a front cover 6 that can be opened forward and open the front transport path Rf, and disposed above the lower transport path Rd inside the apparatus main body 2 and displaced upward to lower the lower transport path Rf. R
A document guide section (paper guide section) 7 capable of opening d is provided.

In this case, the front end of the upper cover 5 can be rotatably mounted on the apparatus main body 2, and the lower end of the front cover 6 can be rotatably mounted on the apparatus main body 2. The front cover portion 6 has a curved guide surface 6g on its inner surface for making a U-turn of the document. On the other hand, the document guide section 7 includes an entrance guide section 7i and an exit guide section 7 that are disposed before and after in the transport direction.
o, the entrance side guide portion 7i can be rotatably attached to the apparatus main body 2 at the exit side end. Also, the front cover 6 has cams 6c, 6c that engage with the entry-side guide 7i when the front cover 6 is opened and displace the entry-side guide 7i upward. 6 is displaced up and down in conjunction with the opening and closing of 6. Furthermore, the exit side guide portion 7o can be rotatably attached to the apparatus main body 2 at the entry side end.

[0010]

According to the paper conveying apparatus 1 of the present invention, a document is conveyed from the document supply section 3 disposed on the upper surface portion 2u of the apparatus main body 2 to the inside of the apparatus main body 2 at the front lower side. After making a U-turn, it is transported upward and backward, and the device body 2
To the original receiving section 4 arranged on the upper surface 2u of the document. That is, the document is transported along the U-shaped document transport path R. In this case, since the front end of the apparatus main body 2 is provided with the front cover portion 6 and the inner surface of the front cover portion 6 has a curved guide surface 6g, the document conveyed from the document supply portion 3 is moved by the guide surface 6g. I make a U-turn.

On the other hand, when a jam is to be cleared when a document is jammed, the upper cover 5 provided on the upper surface 2u of the apparatus main body 2 is first opened upward, so that the upper cover 5 is supported at the front end. And the upper conveying path Ru is opened. Further, by opening the front cover portion 6 disposed on the front surface portion 2f of the apparatus main body 2 forward, the front cover portion 6 is pivotally displaced about the lower end as a fulcrum, and the front side transport path Rf is opened. Furthermore, the upper side of the lower transport path Rd inside the apparatus main body 2 is provided with an entrance guide 7i and an exit guide 7o arranged in the front and rear in the transport direction, so that the entrance guide 7i is located at the exit end. Is pivoted upward about the fulcrum, so that the lower transport path R
d is opened at the entrance half, and the exit guide 7o is opened.
Is pivotally displaced upward about the entrance end, whereby the exit half of the lower transport path Rd is opened. At this time, since the front cover portion 6 has the cam 6c, opening the front cover portion 6 causes the cam 6c to be displaced upward, and the entry-side guide portion 7i engaged with the cam 6c opens the front cover portion 6. Displaces upward in conjunction with.

Thus, the upper cover 5 and the front cover 6
If the operation of opening the exit guide portion 7o is performed, the entrance guide portion 7i is interlocked with the front cover portion 6, so that the entire section of the document transport path R is opened. In addition, since all of the document conveying paths R are opened upward, all jam processing can be performed from above the apparatus main body 2. Therefore, the jam processing is facilitated, and the problem of damaging the paper is eliminated.

[0013]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings. It is to be noted that a case in which the sheet conveying apparatus 1 of the embodiment is applied to a document reading apparatus provided in a facsimile is illustrated.

In FIG. 5, F shows the overall appearance of the facsimile. The facsimile F has a cabinet 51,
At the front of the cabinet 51, a document reading device M having the sheet conveying device 1 according to the present embodiment is disposed. A document supply unit 3 inclined forward and downward is disposed on the upper surface 2u of the apparatus main body 2 of the sheet transporting device 1, and a document inclined forward and downward is provided at a position separated from the document supply unit 3 behind. A document receiving section 4 is provided. Note that various functional units necessary for the facsimile F such as a printing device not shown in the drawing are built in the cabinet 51.

Next, the configuration of the sheet transport device 1 according to the present embodiment will be specifically described with reference to FIGS.

In FIG. 1, reference numeral 2 denotes an apparatus main body having a main body chassis 11. On the upper surface 2u of the apparatus main body 2, the above-described original supply section 3 and an original receiving section 4 arranged behind the original supply section 3 are provided. Prepare.

On the other hand, reference numeral 12 denotes an upper chassis (swing chassis) which constitutes a part of the upper cover portion 5. The front end of the upper chassis 12 is rotatably mounted on the upper front end of the main body chassis 11 by a support shaft 13. . The upper chassis 12 includes a first pinch roller 14, an image sensor (document reading unit) 15, a document separation roller 16, and a delivery roller 17 from the front side in the document conveyance direction, and the upper chassis 12 integrally includes a document guide surface 18. Form. On the other hand, the main body chassis 1
1 includes a first transport roller 19 facing the first pinch roller 14, a pressing roller 20 facing the image sensor 15,
A document separation plate 21 facing the document separation roller 16 is provided. Reference numeral 22 denotes a transport guide plate attached to the main body chassis 11, and a front side faces an inner surface of a front cover 6 described later.

Reference numeral 23 denotes a front chassis which forms a part of the front cover 6. The lower end of the front chassis 23 is rotatably attached to a lower portion of the front end of the main body chassis 11 by a support shaft 24. The inner surface of the front chassis 23 forms a curved guide surface 6g for making a U-turn of the document, and as shown in FIG.
6c is integrally formed. In FIG. 4, A indicates a document.

Further, a document guide section 7 is provided inside the apparatus main body 2. The document guide section 7 includes an entrance guide section 7i and an exit guide section 7o arranged before and after in the transport direction.
The entry-side guide 7i has its exit end rotatably attached to the main body chassis 11 by the support shaft 25, and the exit-side guide 7o has its entry end mounted rotatably to the main body chassis 11 by the support shaft 26. . The front side of the entry-side guide portion 7i faces the inner surface of the front cover portion 6, and the cam 6c,
6c. On the other hand, the exit side of the exit side guide portion 7o extends upward, and the leading end side thereof faces the delivery roller 17, thereby constituting a part of the document supply section 3. A second pinch roller 27 is provided on the entrance side guide 7i, and a third pinch roller 28 is provided on the exit side guide 7o. On the other hand, the main body chassis 11 has the second pinch roller 2
Transport roller 29 and third pinch roller 2 facing
, A conveyance guide plate 3 disposed below the entrance guide 7i and the exit guide 7o.
1 is provided.

With the above structure, the original is transported to the apparatus main body 2 from the original feeder 3 to the front and lower part, and after the U-turn is made by the guide surface 6g of the front cover part 6, the original is transported to the upper rear and received by the original. Document feed path of an oblique U-shape leading to the section 4, that is, the upper feed path Ru, the front feed path Rf, and the lower feed path R
d is provided. In each of the drawings, the document conveyance path R is indicated by a chain line.

Next, an operation including a positional relationship and a function of each unit in the document feeder 1 according to the present embodiment will be described with reference to FIG.
This will be described with reference to FIG.

First, a plurality of stacked documents are set in the document supply unit 3. Normally, the upper cover 5 (upper chassis 12) and the front cover 6 (front chassis 23)
As shown in FIG. Thereby, the document separation roller 16 is on the document separation plate 21, the image sensor 15 is on the pressing roller 20,
The first pinch rollers 14 abut against the first transport rollers 19, respectively, and the upper transport path Ru and the front transport path Rf are set. Further, the tips of the cams 6c, 6c in the front cover portion 6 are displaced downward, and the cams 6c, 6c and the entry-side guide portion 7i.
Is disengaged, the entrance guide 7i is also displaced downward, and the second pinch roller 27 is
, And the entry half of the lower transport path Rd is set. Further, the exit guide portion 7o is also displaced downward. As a result, the third pinch roller 28 comes into contact with the third transport roller 30, and the output half of the lower transport path Rd is set.

On the other hand, in the transmission mode, the delivery rollers 17 and
The document separation roller 16, the pressing roller 20, the first conveyance roller 19, the second conveyance roller 29, and the third conveyance roller 30 rotate, and the plurality of documents set in the document supply unit 3 are separated from the document separation roller 16 by the document separation. By the separating operation of the plate 21, the original is supplied one by one from the uppermost document to the image sensor 15 side. The original is placed between the image sensor 15 and the press roller 20, the first transport roller 19 and the first pinch roller 14.
, Between the guide surface 6g and the transport guide plate 22, between the guide surface 6g and the entrance guide portion 7i, between the entrance side guide portion 7i and the transport guide plate 31, between the second transport roller 29 and the second pinch roller 27, and on the exit side. Between the guide portion 7o and the transport guide plate 31, the third transport roller 30 and the third pinch roller 28
The document is conveyed to the document receiving section 4 through the gap. That is, the document is conveyed along the U-shaped document conveyance path R. And at this time,
The original is read by the image sensor 15.

By the way, during the conveyance, the original is
Suppose that it is jammed. In this case, jam processing is required. First, when a document is jammed in the upper conveyance path Ru, the rear end of the upper cover 5 may be opened upward as shown in FIG. As a result, the upper cover portion 5 is pivotally displaced counterclockwise around the support shaft portion 13 at the front end as a fulcrum, and the upper conveyance path Ru is opened. The rotation range of the upper cover 5 is
In FIG. 3, it is clearly indicated by an arrow Hu.

When a document is jammed from the upper transport path Ru to the front transport path Rf, the upper cover 5 is opened and the upper end of the front cover 6 is opened forward as shown in FIG. I just need. As a result, the front cover portion 6 is pivotally displaced counterclockwise about the support shaft portion 24 at the lower end, and the front side transport path Rf is also opened. On the other hand, the cam 6c provided on the front cover part 6 is also displaced upward, as shown in FIG. 2, to push up the entry side of the entry side guide part 7i to be engaged.
i is displaced clockwise about the support shaft 25 at the output end, and the input half of the lower transport path Rd is opened in conjunction with the front cover 6. The rotation range of the front cover 6 is clearly indicated by an arrow Hf in FIG.
Is clearly indicated by an arrow Hi in FIG.

Further, if the paper jams from the upper transport path Ru to the lower transport path Rd or from the front transport path Rf to the lower transport path Rd, the upper cover 5 and the front cover 6 are opened. The outlet end of the outlet guide 7o may be displaced upward. As a result, the exit guide portion 7o is rotated and displaced in the counterclockwise direction with the support shaft portion 26 at the entry end as a fulcrum, and the exit half portion of the lower transport path Rd is opened. Note that the rotation range of the exit-side guide portion 7o is clearly indicated by an arrow Ho in FIG.

As described above, according to the state of the jam of the document,
The upper cover section 5, the front cover section 6, and the exit guide section 7o can be arbitrarily operated to open the three sections, and a required section or the entire section (four sections) of the document conveying path R can be opened.
Particularly, since the document guide section 7 is divided into two parts, the two pinch rollers 27 and 28 can be separated from the opposing transport rollers 29 and 30 by a sufficient distance. In addition, at this time, since they are all opened upward,
It is possible to easily perform the entire jam processing, for example, all the jam processing can be performed from above the apparatus main body 2, and to eliminate the problem of breaking or wrinkling the original.

Although the embodiments have been described in detail, the present invention is not limited to such embodiments. For example, the embodiment exemplifies a facsimile document reading apparatus, but the present invention can be similarly applied to a printing apparatus or another similar mechanism. In addition, the configuration, shape, and the like of the details can be arbitrarily changed without departing from the gist of the present invention.

[0029]

As described above, the paper transport apparatus according to the present invention transports the paper forward and downward from the paper supply unit, makes a U-turn at the front end of the apparatus main body, and then transports the paper upward and backward to receive the paper. A paper transport path leading to the main body of the apparatus is provided, and an upper cover section that is disposed on the upper surface of the apparatus main body and that can be opened upward to open the upper transport path, and is disposed on a front section of the apparatus main body, and is opened forward. A front cover portion capable of opening the front transport path and a paper guide portion disposed above the lower transport path inside the apparatus main body and capable of being displaced upward to open the lower transport path are provided. It produces such remarkable effects.

The mechanism and operation for opening the paper conveyance path when a paper jam occurs are simplified, and the jam clearance can be easily performed.

Since the jammed paper can be easily removed, there is no risk of the paper being torn or wrinkled, and the problem of damaging the paper can be eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a main part of a sheet conveying device according to the present invention;

FIG. 2 is a schematic side view showing a main part of the paper transport apparatus during jam processing;

FIG. 3 is an operation explanatory diagram for explaining an operation of a main part of the paper transport device;

FIG. 4 is a front view of a front cover portion in the paper transport device.

FIG. 5 is an external side view of a facsimile provided with the paper transport device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper transport device 2 device main body 2 u upper surface 2 f front 3 document feeder (paper feeder) 4 document receiver (paper receiver) 5 upper cover 6 front cover 6 c cam 6 g guide surface 7 document guide (paper) Guide portion 7i Inlet guide portion 7o Outlet guide portion R Document transport path (paper transport path) Ru Upper transport path Rf Front transport path Rd Lower transport path

Claims (9)

(57) [Claims] A sheet is conveyed from a paper supply unit disposed on the upper surface of the apparatus main body to the inside of the apparatus main body.
After the paper is turned, the paper is transported forward and downward from the paper supply unit in the paper transport device that transports the paper to the paper receiving unit disposed on the upper surface of the apparatus main body, and after the U-turn is performed at the front end of the apparatus main body, the rear upward A paper transport path for transporting the paper to the paper receiving section is provided, and is disposed on the upper surface of the apparatus main body, and is provided on an upper cover portion that can be opened upward to open the upper transport path and a front face of the apparatus main body. A front cover that can be opened forward and open the front transport path; and a paper guide that is disposed above the lower transport path inside the apparatus body and that can be displaced upward to open the lower transport path. A sheet transport device comprising a unit. 2. The sheet conveying device according to claim 1, wherein the upper cover has a front end rotatably attached to the apparatus main body. 3. The sheet conveying apparatus according to claim 1, wherein the lower end of the front cover is rotatably attached to the apparatus main body. 4. The front cover portion has a curved guide surface on its inner surface for making a U-turn of the document.
Or the paper transport device according to 3. 5. The paper transport device according to claim 1, wherein the paper guide portion includes an entrance guide portion and an exit guide portion disposed before and after in the transport direction. 6. The paper conveying apparatus according to claim 5, wherein the entrance side guide section has an exit side end rotatably attached to the apparatus main body, and is displaced up and down in conjunction with opening and closing of the front cover section. . 7. The sheet conveying device according to claim 6, wherein the front cover has a cam for displacing the entrance guide upward when the front cover is opened. 8. The sheet conveying device according to claim 5, wherein the exit side guide portion is rotatably attached to an entrance end of the exit side guide portion to the apparatus main body. 9. The paper transport device according to claim 1, wherein the paper transport device is applied to a facsimile document reading device.