JP3318155B2 - Document transport type reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reading device provided in a copying machine, a facsimile, a printer, and the like. In particular, the present invention relates not to a movable reading optical system that moves a reading optical system to read the contents of a document, but to a document transport-type reading device that transports and reads a document.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, an endless belt 3 is interposed between a rotating body 1 on a driving side and a rotating body 2 on a driven side. A reading means 4 is provided on the upper left side of the endless belt 3 in the drawing, and a document pressing rotating body 5 is provided on both sides with the reading means 4 interposed therebetween, and the document pressing rotating body 5 and the reading means 4 are supported. Press the spring 7 against the member 6 from above,
There is a configuration in which the original pressing rotary member 5 is pressed against the endless belt 3 by being urged by the spring 7.

At the time of reading, the original G is placed on the endless belt 3, and the rotating body 1 on the driving side is rotated to convey the endless belt 3, and the endless belt 3 rotates the original pressing rotating body 5. Then, the original G is conveyed by the endless belt 3 while being held by the rotating body 5, and the original contents on the original G are read by the reading means 4.

However, in this reading apparatus, when the rotating body 1 on the driving side is rotated to convey the endless belt 3,
The endless belt 3 easily slips at the roller winding portion 3a, and therefore, there is a problem that the conveyance of the document G becomes uneven.

Further, when a thick original is conveyed, or as shown in FIG.
When the original G having a width D longer than the length L between the outer ends of the original 5b is conveyed, the original pressing rotary member 5 does not directly contact the endless belt 3; Cannot be rotated, and similarly, there is a problem that the conveyance of the document G is uneven.

In view of the above, there have been known (a) a drive-side rotating body 1 in which a roller portion 1a is formed by dividing the roller portion into a plurality as shown in FIG. 11 or an aluminum tube 1b as shown in FIG. There is one that uses a plurality of rubber bands 1c to prevent the endless belt 3 from slipping as shown in FIG.

(B) As shown in FIG. 13, the drive force of the drive motor 8 transmitted to the drive side rotating body 1 by the drive transmission means a such as a gear or a belt is used by another drive transmission means b. The document pressing rotary member 5 is transmitted to the endless belt 3 as shown in FIG.
In some cases, the original holding member 5 can be rotated and the original G can be conveyed by rotating the original holding member 5 even when the original is separated from the original.

[0008]

However, heretofore,
(B) using an expensive drive roller 1 or (B)
When the drive transmission means b is provided separately as in
There was a problem that the cost was increased accordingly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a document-conveying-type reading apparatus without causing such a high cost.
An object of the present invention is to prevent the occurrence of uneven conveyance of a document during reading to prevent the reading quality from deteriorating.

[0010]

For this purpose, a document-conveying type reading apparatus according to the present invention comprises a driving-side rotating body 10 having a meshing portion such as a gear 20, as shown in the following embodiment, for example. A first meshing portion 15a meshing with a meshing portion of the rotating body 10 on the driving side;
A second engaging portion 15b is provided separately from the engaging portion 15a,
The endless belt 15 that spans the driving-side rotator 10 and the other driven-side rotator 11 and conveys the placed document G, meshes with the second meshing portion 15b, and rotates. Document holding rotators 30 and 31 for holding the document G on the belt 15, and the document holding rotators 30 and 31
Reading means 25 for reading the contents of the original G pressed by 31
And characterized by comprising:

[0011]

When reading, the rotating body 10 on the drive side is rotated, the endless belt 15 is conveyed via the meshing portion and the first meshing portion 15a, and the belt is conveyed via the meshing with the second meshing portion 15b. Document holding rotator 30
The document G placed on the endless belt 15 is conveyed while the document press 31 is rotated and the document pressing rotary members 30 and 31 are pressed, and the document content of the document G is read by the reading means 25.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a copy board provided with an embodiment of a document transport type reading apparatus according to the present invention.

Although not shown, this copy board includes a relatively thin and long box-shaped outer case, and a driving-side rotating body 10 and a driving-side rotating body 10 are provided inside the outer case on both left and right length directions in FIG. The driven rotating body 11 is connected to the roller shaft 12.
3 are arranged in the width direction, and both ends of each of the roller shafts 12 and 13 are supported by opposing side plates (not shown). Then, an endless belt 15 is hung between the rotating bodies 10 and 11. The endless belt 15 is biased by a spring (not shown) to move the endless belt 15
・ Be stretched between 11 Then, the back plate 14 is provided inside the endless belt 15, and the back plate 14 backs the upper inner surface of the bridging portion of the endless belt 15.

Further, the endless belt 1 is provided inside the outer case.
5 is provided with a motor M that can be driven forward and backward in the left front in FIG. A timing belt 19 is stretched between a motor gear 17 of the motor M and a gear 18 provided on one end of the roller shaft 12 of the driving-side rotating body 10.

As shown in FIG. 3, the drive-side rotator 10 has gear-shaped members 20 each having substantially the same diameter as the roller portion 10a attached to each end of the roller shaft 12.
As shown in FIG. 4, the roller shaft 12 has a D-shaped cross section, and the gear-shaped member 20 has the roller shaft 1 at the center.
2 is provided with a shaft hole 20a having a shape corresponding to the D shape. Thus, the roller shaft 12 is fitted into the shaft hole 20a, and the gear-shaped members 20 are attached to both ends of the roller shaft 12 so as to be integrally rotatable. As shown in FIG. 5, for example, the gear-shaped member 20 may be screwed to both ends of the roller shaft 12 so as to be integrally rotatable.

The endless belt 15 is provided with concavities and convexities continuously on both sides in the width direction as shown in FIG. 6, and forms a first meshing portion 15a on one side (inside) and the other side (outside). And a second meshing portion 15b is formed on the second member. Then, as shown in FIG.
a is engaged with the gear-shaped members 20 on both sides.

As shown in FIGS. 1 and 2, the copy board is provided with reading means 25 above the front side (left side in the figure) of the endless belt 15 in the longitudinal direction. The reading means 25 has an elongated box shape in the width direction of the endless belt 15, and both ends thereof are supported by opposed side plates. further,
A pair of manuscript holding rotators 30 and 31 are arranged on both front and rear sides with the reading means 25 interposed therebetween,
31 is rotatably supported by the opposite side plate.

As shown in FIG. 2, a plurality of pressing rollers 30a and 31a are provided on roller shafts 26 and 27 at intervals, and both ends of the roller shafts 26 and 27 And the driven rollers 30b and 31b are provided.

The driven rollers 30b and 31b each have a gear shape, and are located at positions outside the width of the original G having the maximum size in the width direction.
It is engaged with the second engagement portion 15b of the endless belt 15.

Although not shown, the above-mentioned copy board is provided with, for example, a thermal printer for recording on recording paper in an outer case. Further, the printer includes a paper transporting unit for feeding recording paper to the thermal printer.

The copy board of this embodiment is used, for example, on a table. And
When making a copy of the document, the document is first placed on the handwritten surface 35 shown in FIG. Then, the tip is abutted against the pressing roller 31a, and is set, for example, on the basis of the center.

Thereafter, a copy switch is pressed to start copying. Then, the motor M is driven, the driving force is transmitted to the driving-side rotator 10 via the timing belt 19 and the like, and the driving-side rotator 10 is rotated. Thus, the endless belt 15 is transported through the engagement between the gear-shaped member 20 and the first engagement portion 15a. Then, the original pressing rotators 30 and 31 are rotated through the engagement of the second engagement portion 15b and the driven rollers 30b and 31b, and the pressing rollers 3 are rotated.
The document G is conveyed at a constant speed in a direction indicated by an arrow A in FIGS. 1 and 2 while the original G is rotated by rotating the reference rollers 31a and 31a. Then, the document contents of the document G are read by the reading means 25, and a recording sheet is fed by a sheet conveying means as appropriate, and the read contents are recorded on the recording paper by a thermal printer.

Thus, the recorded paper is discharged from a recording paper discharge opening (not shown), and the read original G is discharged from another original discharge opening.

Note that the copy board of this embodiment can be used as a handwriting board. In that case, a picture or a character is drawn on the handwriting surface 35 using a writing implement such as a water-based pen. The handwritten content can be erased by appropriately wiping the handwritten surface 35 with a board wipe. When it is desired to continue drawing an image on the new handwritten surface 35 without erasing the picture or the like, the endless belt 15 is appropriately conveyed forward and backward, and the endless belt 15 is fed to draw out the handwritten surface 35 on which nothing is written.

Further, when it is desired to save the handwritten content drawn on the handwritten surface 35, the copy switch is pressed to convey the endless belt 15, and the handwritten content is read while moving the handwritten surface 35 in the conveying direction A as described above. The read contents are read by the means 25, and the read contents are recorded on recording paper by a thermal printer to obtain a copy.

In the illustrated embodiment described above, irregularities are continuously provided at both ends of the endless belt 15, the first meshing portion 15a on the inner side meshes with the gear-shaped member 20 of the driving side rotating body 10, and the outer The two meshing portions 15b are configured to mesh with the driven rollers 30b and 31b of the document holding rotating bodies 30 and 31.

However, according to the present invention, for example, the following configuration is also possible. That is, as shown in FIG.
The endless belt 15 has holes 40 on both sides in the width direction.
Are used at equal intervals. As shown in FIG. 8, conical sprockets 50 b are provided at equal intervals on the outer periphery of the ring-shaped member 50 a, and the rotating member 50 is used. The rotating member 50 is attached to both ends of the roller shaft 12 of the driving-side rotating body 10. Attach. Further, although not shown, a driven roller having a sprocket on the outer periphery is used as the driven roller, and the driven roller with the sprocket is provided at both ends of the roller shafts 26 and 27 of the document holding rotating bodies 30 and 31. And
The sprocket 50b of the rotating body 50 is engaged with the holes 40 at both ends of the endless belt 15 from below, and the sprocket of the driven roller is engaged from above.

When reading the original, the driving-side rotator 1
0 is transmitted to the endless belt 15 through the engagement between the sprocket 50b and the hole 40 to convey the belt,
The document holding rotators 30 and 31 are rotated through the engagement between the holes 40 and the sprockets of the driven rollers, and the document G on the endless belt 15 is conveyed at a constant speed.

In the above-described embodiment, the present invention is applied to a copy board. However, the present invention is not limited to this, and it is needless to say that the present invention can be applied to other copying machines, printers, facsimile machines and the like.

In the illustrated embodiment described above, the original pressing rotary member is pressed against the endless belt by a spring as shown in FIG. 9 and the original pressing rotary member is rotated by friction between the belt and the endless belt. Then, the document holding rotating bodies 30 and 31 are rotated through meshing with the second meshing portion 15b of the endless belt 15 and the like. Therefore, since no urging component such as a spring is required, the cost can be reduced accordingly. In addition, since the urging force of the spring is too strong, there is no needless harm that the original pressing rotator rubs the image on the original or handwritten surface.

[0031]

According to the present invention, the endless belt is conveyed by meshing the first meshing portion with the meshing portion of the driving-side rotator, and the original pressing rotary member meshes with the second meshing portion of the endless belt. The endless belt surely prevents the endless belt from slipping at the roller winding portion without using an expensive driving-side rotating body such as a roller portion divided into a plurality of portions as in the related art. In addition to this, the original pressing rotary body can be reliably rotated by the endless belt and the original can be transported without transmitting the driving force of the drive motor to the original pressing rotary body using the drive transmitting means. Can be prevented from causing uneven conveyance of the original during reading. Further, according to the present invention, it is not necessary to use an expensive original holding member made of a material having a high coefficient of friction in order to increase the frictional force between the original holding member and the original. it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a copy board according to an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a plan view of a driving-side rotator provided in the copy board.

FIG. 4 is a perspective view showing a state where a gear-shaped member is attached to a roller shaft of the rotating body.

FIG. 5 is a perspective view showing another example of attachment of the gear-shaped member.

FIG. 6 is a partial longitudinal sectional view of an uneven side portion of the endless belt.

FIG. 7 is a partial longitudinal sectional view showing another example of the endless belt.

FIG. 8 is a perspective view of a rotating member provided with a sprocket on the outer periphery.

FIG. 9 is a schematic configuration diagram showing a conventional document conveyance type reading device.

FIG. 10 is an explanatory diagram showing a document conveyance state in the reading device.

FIG. 11 is a plan view showing the shape of a driving-side rotator used in another conventional document conveying type reading device.

FIG. 12 is a cross-sectional view showing the shape of still another driving-side rotating body.

FIG. 13 is a schematic configuration diagram showing still another conventional document conveyance type reading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Driving side rotating body 11 Follower side rotating body 15 Endless belt 15a 1st meshing part 15b 2nd meshing part 20 Meshing part (gear) 25 Reading means 30 Original pressing rotating body 31 Original pressing rotating body G Original

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 5/02 G03G 15/00 107 G03G 15/04 115 H04N 1/00 108

Claims (1)

(57) [Claims] A first rotating member having a meshing portion, a first meshing portion meshing with a meshing portion of the driving-side rotating member, and a second meshing portion provided separately from the first meshing portion; An endless belt that is placed between the rotating body on the side and another driven rotating body and conveys the placed document; and a document that rotates while meshing with the second meshing portion and presses the document on the endless belt. A document conveying type reading device comprising: a presser rotating body; and reading means for reading the contents of a document to be pressed by the document presser rotating body.