JPH07250211A - Reader - Google Patents

Abstract

PURPOSE:To convey and read a thick original or a spread original to change its thickness by arranging the conveying power generating part of a second conveying power generating means so as to gradually widen a gap to the original supporting plane of an original supporting guide toward an anti-original conveying direction. CONSTITUTION:The conveying plane of a second conveying power generating means 12 is arranged toward a first conveying power generating means 6 so as to gradually widen the gap toward the anti-original conveying direction, namely, so as to narrow the gap toward an original conveying direction. Therefore, together with the conveyance of the original, the thick part at the joint of originals is sandwiched to convey the original. In this case, a second driven roller 17 is pushed up according to the conveyance of the original, the original is sandwiched by a first driven roller 11 and the second driven roller 17 and conveying power can not be provided any more but since the original is sandwiched by conveying planes, conveyance is possible. Then, the original is further conveyed while pushing up the second driven roller 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reading device which conveys an original by a conveying means and reads an image of the original with a reading sensor.

[0002]

2. Description of the Related Art Conventionally, a reading device which conveys an original and reads an image of the original with a reading sensor has been disclosed in Japanese Utility Model Laid-Open No.
As described in the publication, the sensor roller is pressed against the reading surface of the reading sensor, the original is pressed against the reading surface, and the original is conveyed. Also, for a thick original such as a book in a two-page spread, as described in Japanese Patent Laid-Open No. 4-83460, the original is supported on the glass surface with the reading side facing downward and the lower side of the glass is read. The sensor moved to read the image on the document.

[0003]

In the above prior art, when a document is transported by a document transport mechanism using rollers, the roller cannot transport the document when the document is thick like a document such as a book. Further, in the case of a double-page spread original, there is a problem that the roller cannot get over the step when the thickness of the original increases at the double-page spread. When the roller hits the corner of a thick original or the corner of a step, the angle of the original with respect to the roller for generating the conveying force depends on the tangent angle of the corner between the roller and the original on the side opposite to the conveying direction. The normal force of changes. When the tangent angle is large, most of the pressing force of the roller becomes vertical resistance, the frictional force between the roller and the corner of the original becomes large, and sufficient conveyance force is generated so that the roller can pass over the original and the original can be conveyed. Become. However, when the tangent angle is small, the vertical drag force is reduced, a sufficient conveying force is not generated, and the original cannot be conveyed. When a roller is used, the tangent angle increases as the thickness of the original increases. For example, when the radius of the roller and the thickness of the original become equal, the tangent angle is 90 °, that is, the pressing force of the roller is equal to that of the square roller of the original. The normal force is not converted into the normal force, and the conveyance force cannot be generated. As described above, when the roller is used as the conveying means, only the original having a radius smaller than that of the roller can be conveyed, and it is necessary to increase the diameter of the roller to increase the thickness of the original that can be conveyed. It was possible.

Further, when the image position of a document changes like a book in a two-page spread state, the reading position of the reading sensor is not constant and the read image is disturbed.

On the other hand, in a reading device which reads an original by supporting the original on a glass surface and moving a reading sensor below the glass, it is possible to read an image even if the original has a large thickness, but it should be read. An original supporting glass larger than the area of the original is required, and further, a space below the glass for allowing the reading sensor to be moved is required in the apparatus, which makes it impossible to downsize the apparatus.

An object of the present invention is to provide a reading device having a document feeding system which enables downsizing of the device, and which is capable of feeding and reading a document having a large thickness or a spread document having a varying thickness. To provide.

[0007]

A reading device comprising a conveying means for conveying an original, a reading sensor for reading an image of the conveyed original, and an original supporting guide for supporting the conveyed original, the conveying means comprising: Is a first conveying force generating unit on the side of the document supporting guide, in which a plurality of conveying force generating units that are in contact with the document and generate a conveying force are arranged, and a conveying force generating unit facing the first conveying force generating unit. A plurality of second conveying force generating means arranged side by side, and the conveying force generating portion of the second conveying force generating means is gradually spaced from the document supporting surface of the document supporting guide in the counter document conveying direction. Is arranged so as to spread, and the conveying force generating portion on the document conveying direction side is configured to be vertically movable with respect to the document supporting surface and pressed by the conveying force generating portion of the first conveying force generating means.

Further, the conveying means is provided on a side of the original supporting guide and constitutes a conveying surface for conveying an original, and a conveying direction side is movable up and down with respect to the first conveying belt. A second conveyor belt that is pressed against the second conveyor belt, the second conveyor belt being a first conveyor belt that forms a conveyor surface, and the conveyor direction side that is vertically movable with respect to the first conveyor belt. And a second transport belt which is arranged such that the transport surface of the second transport belt is wider than the transport surface of the first transport belt in the direction opposite to the original transport direction. .

[0009]

The transporting force generating portion of the second transporting force generating means is arranged so as to gradually widen in the direction opposite to the document transporting direction with respect to the document supporting surface of the document supporting guide. Is configured to be pressed by the carrying force generating portion of the first carrying force generating means so as to be vertically movable with respect to the document supporting surface.

In the case of a double-page spread original having a thickness that is thicker than the double-page spread and a step is formed, the document-transport-direction-side transport force generation unit first generates a transport force to transport the document. And
When the step portion is conveyed, the step portion comes into contact with the conveying force generating portion arranged so that the interval gradually widens in the direction opposite to the original conveying direction according to the height of the step portion and receives the conveying force. The same applies when a thick original is inserted. When the step further progresses, the document-transport-direction-side transport force generator collides with the step, but the transport force of the counter-document transport-direction-side transport force climbs onto the step and generates the first transport force. The document is transported by pressing against the means to obtain a transporting force, overcoming the step. Further, since the conveying force generating section is arranged so as to gradually widen in the direction opposite to the conveying direction of the original, the tangent angle to the conveying direction when the conveying force generating section is in contact with the step portion is small, and the second conveying force is small. The pressing force of the generating means in the direction of the first conveying force generating means becomes almost a vertical reaction force for generating a frictional force between the conveying force generating portion and the step portion, and a sufficient conveying force can be obtained.

On the other hand, the second conveyor belt is arranged such that the conveyor surface is wider than the conveyor surface of the first conveyor belt in the direction opposite to the original conveying direction. First, at the time of insertion, a document is transported by generating a transport force at a portion pressed against the first transport belt on the transport direction side. When a stepped portion or a thick original is conveyed, the height of the conveyance surface of the second conveyor belt with respect to the first conveyor belt decreases in the conveying direction, and the stepped portion is sandwiched to reduce the conveyance force. It is generated and the original is conveyed over the step.
Further, since the second conveyor belt is arranged such that the distance between the second conveyor belt and the conveyor surface of the first conveyor belt increases in the direction opposite to the original conveyance direction, when the step portion contacts the second conveyor belt. Has a small tangential angle with respect to the conveying direction, and the pressing force of the second conveying force generating means in the direction of the first conveying force generating means is almost the normal force for generating the frictional force between the second conveying belt and the step portion. Therefore, it is possible to obtain a sufficient conveying force.

According to the present invention, it becomes possible to convey and read a thick original document or a thick original document such as a double-page spread book, and a large-sized original document or double-page spread book or the like can be obtained with a small device. It is possible to scan thick originals.

[0013]

1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a rear view thereof. 1 is a cross-sectional view taken along the alternate long and short dash line in FIG. 2 as viewed from the direction of arrow g in the figure. The right half of the alternate long and short dash line in FIG. It is a figure and the left half is the figure seen from the left direction in FIG.

The reading device main body 100 basically comprises an upper plate 2, left and right side plates 1 and a bottom plate 3 in FIG.

In FIG. 1, the document is supported by the first document support guide 4 and is inserted from the direction of arrow a in the figure. The first carrying force generating means 6 is supported by the apparatus main body 100.
The first conveying force generating means 6 includes a first driving roller 9 supported by a first driving shaft 8, a first driven roller 11 supported by a first rotating shaft 10, and a first driving shaft 8. First rotary shaft 1
It is composed of a first support member 25 that defines an interval of 0, and a first conveyor belt 7 stretched between both rollers. The second conveying force generating means 12 is rotatably supported by the reading device main body 100 with the second drive shaft 14 as the center of rotation.
The second conveying force generating means 12 includes a second driving roller 15 supported by the second driving shaft 14, a second driven roller 17 supported by the second rotating shaft 16, and a second driving shaft 14. It is composed of a second support member 26 that defines the interval between the second rotating shafts 16 and a second conveyor belt 13 that is stretched between both rollers. Second driven roller 1 of second conveying force generating means 12
7 is pressed by a pressure spring 18 in the direction of arrow b in the figure.
The first conveyor belt 7 and the second conveyor belt 13 are preferably made of a material having a high coefficient of friction with the original, such as rubber.

The first drive shaft 8 and the second drive shaft 14 include:
As shown in FIG. 2, the gear 40 and the gear 4 mesh with each other.
1 is connected. The rotation from the drive means (not shown)
The pulley 42 receives, the gear 41 rotates, and the gear 40 further rotates. In this way, the first conveyor belt 7
Is fed in the direction of arrow d in the figure, and the second conveyor belt 13 is fed in the direction of arrow e in the figure.

The first document support guide 4 is disposed so as to substantially match the height of the transport surface of the first transport belt 7, and guides the document to the vicinity of the first drive roller 15. The second document support guide 5 is arranged lower than the height of the transport surface of the first transport belt 7, guides the document on both sides of the first transport belt 7 from the vicinity of the first drive roller 15, and further, The document following the first driven roller 11 is guided. The document width guide 50 defines the position of the document in the width direction. By arranging the first document support guide 4 so as to substantially match the height of the transport surface of the first transport belt 7, the friction between the first transport belt 7 and the document during insertion of the document is reduced, When a thin original is inserted, the original will not buckle, making it easy to insert the original. Further, by arranging the second document support guide 5 lower than the height of the transport surface of the first transport belt 7, the document pushed by the second transport force generating means 12 toward the first transport means 6 side. However, it is prevented from being strongly pressed against the second document support guide 5 to increase the conveyance resistance.

As shown in FIG. 1, the reading sensor 30 is supported by a sensor case 31, and has a sensor substrate 32 having photoelectric conversion elements arranged in the out-of-plane direction in the figure, and a row of original images in the out-of-plane direction in the figure. A lens member 33 for forming an image on the photoelectric conversion element substantially 1: 1 and a light source 3 for irradiating the original surface with light.
4, a cover glass 34 that prevents dust and the like from entering the sensor case 31, and a document guide 3 that defines an image reading surface of a document.
It is composed of 5 etc.

As the reading sensor, a CCD sensor having a reduction optical system, a complete contact sensor having no lens system, and the like can be considered. However, the CCD sensor has a large depth of focus and little deterioration of the image due to floating of the image reading surface of the document, but the optical system is large and is not suitable for downsizing of the device, and the perfect contact sensor is downsized and the device can be downsized. However, there is a problem that the depth of focus is shallow and image deterioration is severe with respect to floating of the image reading surface of the document. A reading sensor having a lens system for forming a document image on the photoelectric conversion element substantially 1: 1 as in this embodiment has a depth of focus of about 0.3 to 2.0 mm, There is little deterioration of the image due to the floating of the image reading surface, and the sensor itself is small, which enables both downsizing of the device and image quality.

The document guide 35 is configured to project from the second document support guide 5 so as to be inserted into a recess between pages of the spread part of a book-like document. This prevents the image reading surface of the original from deviating from the focus position of the reading sensor and deteriorating the image. Also, the document guide 35
Is formed so that the height of the original gradually increases from the upstream side to the downstream side in the original conveying direction so that the original can be smoothly conveyed.

The document pressing means 19 is rotatably supported about a rotation fulcrum 23 of the side plate 1 of the apparatus main body 100. The pressing member 20 is pressed in the direction of the arrow b in the drawing by the pressure spring 24 and presses the conveyed original document against the original document guide 35 to reduce the fluctuation of the image reading surface of the original document. The pressing member 20 is formed so that the original is smoothly conveyed and the height gradually decreases from the upstream side to the downstream side in the original conveying direction so as to push up the pressing member 20 when a thick original passes. On the other hand, the pressing member 20 and the document guide 35 have a gap equal to or larger than the expected width of the read document, and if the document conveyed is thin and easily buckles, the gap is passed. This gap is preferably about 0.05 to 2.0 mm. This is because the minimum value of the thickness of a document that is normally used is about 0.05 mm, and the depth of focus of a reading sensor having a lens member 33 that forms a document image on a photoelectric conversion element in a substantially 1: 1 manner. Since it is about 2.0 mm, the distance is such that the disturbance of the read image due to the floating of the document can be prevented and a thin document can pass through.

Next, the operation of the document feeding mechanism of the image reading apparatus of this embodiment will be described with reference to FIGS.

First, as shown in FIG. 3 (a), a book-like original with the image reading surface facing the original support guide 4 is inserted in the direction of arrow a in the figure. When the detection unit (not shown) detects the insertion of the document, a drive unit (not shown) operates, and the first conveyance belt 7 of the first conveyance force generation unit 6 moves in the direction of arrow d in the drawing. Second conveying force generating means 12
The second conveying belt 13 is sent in the direction of arrow e in the figure, and the original is sandwiched between the first driven roller 11 and the second driven roller 17 via the belts, and the original is conveyed in the direction of arrow a in the figure. To do. Then, the read sensor 30 reads the conveyed document.

FIG. 3B shows a state in which the thick portion of the seam of the original is in contact with the original conveying surface of the second conveying force generating means 12. The distance between the conveying surface of the second conveying force generating means 12 and the conveying surface of the second conveying force generating means 6 gradually increases in the direction opposite to the original conveying direction, that is, the distance decreases in the original conveying direction. Is placed in
As the document is conveyed, the thicker portion of the seam of the document is sandwiched and conveyed. As the document is conveyed, the second driven roller 7 is pushed up, and the document is nipped between the first driven roller 11 and the second driven roller 7.
Therefore, it becomes impossible to obtain the conveying force, but the original can be conveyed because the original is sandwiched between the conveying surfaces. The original is further conveyed, and the second driven roller 7 is pushed up and conveyed as shown in FIG.

As described above, according to the present embodiment, it is possible to convey a thick original document, and it is possible to read an image while conveying the original document. Compared with a reading device that reads the original by moving the reading sensor with, the size of the main body of the device can be made smaller and simpler. Here, whether a thick part of the original joint or a thick original can be conveyed. Is determined by the angle of the tangent to the conveyance direction at the point where the conveyance surface and the document contact each other, and the coefficient of friction between the document and the conveyance surface. The friction coefficient between the original and the transport surface is about 1.0 when the transport surface is made of rubber, and the tangent angle is the main condition that influences the transport capability. When the tangent angle is small, the pressing force of the conveying surface against the original becomes a vertical reaction force that almost generates frictional force, and the conveying force between the original and the conveying means is large,
It is possible to push the conveyance surface up against the pressing force and convey the original.However, if the tangent angle is large, the component force of the pressing force, which is the vertical reaction force, will be small and the frictional force between the original and the conveyance surface will be small. It becomes impossible to push the conveyance surface against the pressure and convey the original. For example, when the upper and lower first conveying force generating means and the second conveying force generating means are each constituted by one roller, the rollers are
The tangent angle when the document comes into contact with the original becomes large, and the component of the pressing force, which is the vertical reaction force, becomes small, and it becomes impossible to push the conveyance surface against the pressing force to convey the document. Therefore, at least an original having a thickness equal to or smaller than the radius of the roller can be conveyed, and in order to convey a thicker original, it is necessary to increase the roller diameter, and it is possible to reduce the size of the apparatus and improve the thickness of the conveyed original. It is impossible.

In view of this, in the present embodiment, at least two document conveying surfaces for generating the conveying force are formed by using the belt by the first conveying force generating means 6 and the second conveying force generating means 12, so that at least If the distance between the lower surface of the second drive roller 15 and the upper surface of the first drive roller 9 is less than or equal to the distance, the tangent angle between the document and the document transport surface can be kept constant at a transportable angle regardless of the thickness of the document. For this reason, it is possible to convey a thick document with a device that is smaller than a device that includes a pair of rollers.

FIG. 4 is a sectional view of a reading apparatus according to the second embodiment of the present invention.

The difference from the embodiment shown in FIG.
The second carrying force generating means is composed of a plurality of rollers instead of the belt carrying means, and a pseudo carrying surface is formed by this roller row.

First, the structure will be described.

Roller row 52 of the second conveying force generating means 12
Are arranged such that a space is widened with respect to the roller row 51 of the first conveying force generating means 6 in the direction opposite to the original conveying direction.
The second carrying force generating means 12 is supported rotatably around the drive shaft 14 in the direction of arrow c in the figure. Second transport means 1
The center of rotation of 2 is not limited to the position in the figure,
It suffices that the second roller row 52 can be rotated or moved up and down in the direction of arrow c in the drawing. Drive shaft 14
Is transmitted to each roller of the second roller row 52 by a transmission means (not shown), and rotates in the direction of arrow e in the figure. The rotation of the drive shaft 8 is transmitted to each roller of the first roller row 51 by transmission means (not shown), and rotates in the direction of arrow d in the figure. As a result, the document inserted from the direction of the arrow a in the figure is conveyed, and the image is read by the reading sensor 30.

When a thick original is inserted, first, the original is nipped and conveyed between the rollers of the first roller row 51 and the second roller row 52 on the side opposite to the original conveyance direction. Then, by setting the position of the roller next to the second roller row 52 in contact with the conveying direction side so that the tangent angle of the original document in contact with the roller is equal to or smaller than the original document conveyance limit, the rollers in the second roller row 52 are It enables to transport thick originals. Further, similarly, the rollers of the second roller row 52 at the next position also enable the conveyance of thick originals by setting the tangent angle of the originals in contact with the rollers below the original conveyance limit.

According to the present embodiment, as in the reading device shown in FIG. 1, since a thick original document can be conveyed to read an image, the size of the device can be reduced, and further, a conveying mechanism including a pair of rollers can be used. Compared with this, it is possible to convey thicker documents with a compact structure. Further, since the conveying force generating means is composed of rollers, belt tension adjustment, skew feeding prevention means, etc. are not required like the belt, and the structure can be simplified.

FIG. 5 is a sectional view showing a reading apparatus according to the third embodiment of the present invention, and FIG. 6 is a rear view thereof. Figure 5
6 is a cross-sectional view taken along the alternate long and short dash line in FIG. 6 as viewed from the direction of arrow g, and the right half of the alternate long and short dash line in FIG. 2 is a view taken along the alternate long and short dash line in FIG. Yes, the left half is a view seen from the left direction in FIG.

The difference from the embodiment shown in FIG. 1 is that the reading sensor 30 is supported above the second document supporting guide 5 so as to be vertically movable, and the document is conveyed with its image reading surface facing upward. Further, the support member of the second carrying force generating means 12 is formed in a concave shape in the document carrying direction.

The reading sensor 30 is supported by a support member 27 and is rotatably supported about a rotation fulcrum 23. The reading sensor 30 is pressed in the direction of the second document guide 5 by its own weight or by the pressure spring 24, is pressed against the document surface, and moves up and down along the unevenness of the document, with respect to the focal position of the reading sensor 30. To prevent the image reading surface of the document from fluctuating significantly.

Further, by forming the second support member 26 of the second conveying force generating means 12 in a concave shape with respect to the original conveying direction, as shown in FIG. That is, when the portion where the thickness of the original increases, comes into contact with the second conveying belt 26, the belt is largely bent, the contact area between the original and the conveying surface can be increased, and the conveying force can be increased. Further, due to the bending of the belt, the second conveyor belt 26 and the second support member 26 are brought into contact with each other, which becomes a resistance, and the substantial reduction of the conveying force can be prevented. For this reason, the angle formed by the conveying surfaces of the first conveying force generating means 6 and the second conveying force generating means 12 is increased with respect to the conveying direction to increase the angle of the original and the tangent angle between the conveying surface and the conveying surface. It is possible to secure a sufficient conveying force even if the vertical resistance to Therefore, even if the ratio of the distance between the first driving roller 9 and the second driving roller 15 to the length of the feeding surface in the feeding direction is set large, the original can be conveyed, and a thicker original can be formed with a compact device configuration. Transport becomes possible.

FIG. 8 shows a facsimile apparatus according to an embodiment of the present invention.

The structure of the reading device 100 is the same as the device of the embodiment shown in FIG. In addition, an automatic sheet feeding means 30 that can continuously convey sheet-like documents one by one
0, a transmitting means capable of transmitting the read image through the signal line, a recording means 200 for recording the read image and recording the image received through the signal line, and the like.

The circuit section 70 includes transmitting means, receiving means, a power source,
An operation control circuit and the like are arranged. The recording means 200 is
A roll paper 60, which is a roll of heat-sensitive paper 61 that is discolored by heat, a recording head 62 having heating elements arranged in a row in the direction outside the plane of the drawing, and a coloring surface of the heat-sensitive paper 61 is formed on the recording head 62. It has a platen roller 63 that presses against a heating element and conveys the recording paper.

The automatic sheet feeding means includes a third document support guide 64 for supporting a sheet-like document, a document width guide 65 for defining the position of the sheet-like document in the width direction, and the second drive roller 1.
Separation member 66 pressed against the conveyor belt 13 on the 5 side,
It has a support member 67 for supporting the separating member and a pressing member 68 for generating a force for pressing the separating member 66 against the conveyor belt 13.

The recording means 200, an operation button (not shown), or a circuit section 701 generated by received information
The operation is started according to the instruction from. When the operation is started, the platen roller 63 is rotated by a driving unit (not shown), and the thermal paper 61 is paid out from the roll paper 60. The heating element of the recording head 62 heats in response to the feeding of the platen roller 63 and an image signal to cause the thermal paper 61 to develop a color, thereby forming an image.

The recording method may be another recording method, for example, an electrophotographic method, but the heat-sensitive recording method as in this embodiment is preferable in terms of downsizing.

When a sheet-like document is read by the automatic paper feeding means, the reading surface is placed on the third document support guide 64 with its reading surface facing upward. When the operation is started in response to the instruction from the circuit unit 70, the transport belts of the first and second transport force generating means are fed. By feeding the second conveyor belt 13,
Documents are fed from the uppermost document. At this time, in order to prevent the document below the document from being transported due to friction with the uppermost document to be transported, the separating member 66 is pressed and the document is pressed and held by the frictional force. The separation member 6 is provided so that the uppermost document can be conveyed even if it comes into contact with the separation member 66.
The frictional force between the second conveyor belt 13 and the original is set to be higher than the frictional force between the original 6 and the original, and the originals other than the uppermost one are separated from each other by the frictional force between the originals so that the originals can be pressed by the separating member 66. The frictional force between the member 66 and the document is set to be large. The image of the conveyed document is read by the reading sensor 30.

When reading a thick original,
The automatic paper feeding means 300 can be detached or made to be avoidable upward, and the third original document guide 64 can be placed on the first original document guide 4.
The operability is improved by not overlapping.

According to the facsimile apparatus of the present embodiment, it is possible to realize a facsimile apparatus capable of transmitting and copying thick originals with a small device.

[0046]

EFFECTS OF THE INVENTION A reading device for reading an image by conveying a document which can be downsized, and which has a large thickness,
It becomes possible to realize a reading device capable of conveying and reading a double-page spread document of varying thickness.

[Brief description of drawings]

FIG. 1 is a sectional view of a reading device according to a first embodiment of the present invention.

FIG. 2 is a front view of the reading device according to the first embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of the transport unit of the reading device according to the first embodiment of the present invention.

FIG. 4 is a sectional view of a reading device according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a reading device according to a third embodiment of the present invention.

FIG. 6 is a front view of a reading device according to a third embodiment of the invention.

FIG. 7 is an operation explanatory diagram of the transport unit of the reading device according to the third embodiment of the present invention.

FIG. 8 is a sectional view of a facsimile apparatus according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Side plate, 2 ... Top plate, 3 ... Bottom plate, 4 ... 1st original guide, 5 ... 2nd original guide, 6 ... 1st conveyance force generation means, 7 ... 1st conveyance belt, 8 ... 1st drive shaft, 9 ... 1st drive roller, 10 ... 1st rotating shaft, 11 ... 1st driven roller, 12 ... 2nd conveyance force generation means, 13 ... 2nd conveyance belt, 14 ... Second drive shaft, 15 ... Second drive roller, 16 ... Second rotation shaft, 17 ... Second driven roller,
18 ... Pressure spring, 19 ... Original document pressing means, 20 ... Pressing member, 30 ... Read sensor, 31 ... Sensor case, 32
... sensor substrate, 33 ... lens member, 34 ... light source, 34 ...
Cover glass, 35 ... Original guide, 50 ... Guide, 10
0 ... Device body.

Claims (15)

[Claims] 1. A reading apparatus including a document conveying means, a sensor for reading an image of a conveyed document, and a supporting guide for the conveyed document. A first carrying force generating means in contact with which a plurality of carrying force generating parts are arranged, and a second carrying force generating means in which a plurality of carrying force generating parts are arranged opposite to the first carrying force generating means. The second conveying force generating means has a conveying force generating portion arranged so as to gradually widen in the direction opposite to the original conveying direction with respect to the original supporting surface of the original supporting guide. The reading device, wherein the conveying force generating portion is pressed by the conveying force generating portion of the first conveying force generating means so as to be vertically movable with respect to the document supporting surface. 2. A reading device including a document conveying means, a sensor for reading an image of a conveyed document, and a supporting guide for the conveyed document, wherein the conveying means is located on the side of the document supporting guide to convey the document. A first conveyor belt that constitutes a conveyor surface for conveying, and a second conveyor belt that is pressed against the first conveyor belt in the conveying direction side so as to be vertically movable, and the second conveyor belt is A reading device, characterized in that the conveying surface is arranged so as to widen in a direction opposite to the original conveying direction with respect to the conveying surface of the first conveying belt. 3. The second conveyor belt according to claim 2, wherein the first conveyor belt is supported by a first driving roller and a first driven roller which are arranged at a distance, and the second conveyor belt is arranged at a distance. The second drive roller is supported by a second drive roller and a second driven roller that are arranged, the second drive roller is rotatably supported by the apparatus body, and the second driven roller is rotatably supported by the apparatus body. A reading device that is rotatably supported by the arm. 4. The reading device according to claim 3, wherein the arm is formed in a concave shape with respect to the conveying surface of the second conveying belt. 5. The reading device according to claim 4, wherein a rotation fulcrum of the arm coincides with a rotation center of the second drive roller. 6. The arm according to claim 3, wherein the arm is L-shaped and rotatably supports the second conveying roller and the second driven roller at both ends thereof, and has an L-shaped bending in the conveying direction. A reading device that arranges the parts. 7. The method according to claim 2, 3, 4, 5, or 6,
The document guide includes a plurality of document guides having different heights with respect to the transport surface of the first transport belt, and the first document guide on the upstream side in the transport direction of the first transport belt is the first document guide. The second document guides, which substantially match the height of the transport surface of the transport belt and are arranged at both ends in the rotation axis direction of the first drive roller of the first transport belt and on the downstream side in the transport direction, are the first document guides. A reading device that is lower than the height of the transport surface of the transport belt. 8. A reading sensor according to claim 2, 3, 4, 5, 6 or 7, wherein a photoelectric conversion element arranged in a row in a width direction of the document and an image of the document on the photoelectric conversion element. A reading device having an array of lenses that image one-to-one. 9. The reading sensor according to claim 8, wherein the reading sensor is disposed below the second document guide on the downstream side of the first transport belt in the document transport direction, and protrudes from the second document guide. A reading device having a first guide member that defines a reading surface of a document near the focal position of the document. 10. The reading device according to claim 9, further comprising a pressing member that is supported so as to be vertically movable with respect to the second document guide and that presses the document against the first guide member. 11. The reading sensor according to claim 8, wherein the reading sensor is supported above the second document guide so as to be vertically movable, and protrudes from the reading sensor toward the carrying surface to focus the reading sensor. A reading device including a second guide member that defines a reading surface of a document near the position, and the second guide member and the second document guide have a gap of at least a width of an assumed document or more. 12. A document conveying mechanism, a sensor for reading an image of a conveyed document, a support guide for the conveyed document, a transmission means for transmitting the read image through a communication line, and a communication line for an image signal. In a facsimile apparatus including a receiving unit for receiving an image signal and a unit for recording the received image signal, the transport mechanism includes a first transport belt which is on the document support guide side and constitutes a transport surface for transporting a document, and a transport direction. A second conveyor belt whose side is pressed against the first conveyor belt so as to be movable up and down, and the second conveyor belt has a conveyor surface opposite to the conveyor surface of the first conveyor belt. A facsimile machine, characterized in that it is arranged so that the interval is widened in the document conveying direction. 13. A method according to claim 2, 3, 4, 5, 6, 7, 8,
9. A reading device provided with a document thickness limiting member for limiting the thickness of a document to be inserted upstream of the transport mechanism in the document transport direction in 9, 10, 11 or 12. 14. A separating mechanism for separating a plurality of documents one by one above the limiting member according to claim 13.
A reading device having an automatic paper feeding mechanism for carrying to the carrying mechanism. 15. The reading device according to claim 1, wherein the first conveying force generating mechanism and the second conveying force generating mechanism are composed of a plurality of rollers.