JPH054745A - Document conveyor device - Google Patents

Abstract

PURPOSE:To make the conveying direction by a second conveyor roller easily adjustable in a device for conveying documents by a first conveyor roller and the second conveyor roller respectively disposed upstream and downstream. CONSTITUTION:A second pressure roller 6 provided in such a way as to be pressed to a second conveyor roller 5 is held to an adjusting fitting 20. The adjusting fitting 20 is fitted in the fitting angle adjustable state to a supporting frame 21, and the fitting angle to the document conveying direction of the second pressure roller 6 is changed to adjust the document conveying direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeding device for feeding a document to be read in a document moving type document reading device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, an apparatus of this type has a first conveying roller 3 for conveying an original 2 and a first pressure roller 4 and a first pressure roller 4 for pressing the original 2 before and after the optical axis 1 for reading the original. A second conveying roller 5 and a second pressure roller 6 that is in pressure contact with the second conveying roller 5 are arranged, and the original 2 is conveyed on the reading glass 7 by the first conveying roller 3 and the second conveying roller 5, and a reading unit (not shown). It was supposed to be read by. In the figure, 8 is a guide and 9 is a white reference plate.

Here, as shown in FIGS. 4 and 5, the first conveying roller 3 and the second conveying roller 5 have respective shafts 3a,
5a through bearings 10 and 11 on both sides of the frame 12,
It is positioned at a predetermined position by mounting it in the hole formed in 13. In addition, the first pressure roller 4 and the second pressure roller 6 have their shafts 4a and 6a mounted on bearings 14 and 1, respectively.
5 is attached to a long hole formed in the frames 12 and 13 in the vertical direction via the pressurizing member 5 so that it is held so as to be movable up and down and is pressed against the bearings 14 and 15 thereof. It was pressed by elastic bodies 16 and 17 such as springs and pressed against the corresponding transport rollers 3 and 5.

[0004]

However, in such a construction, the dimensional error of the hole of the frame, the position of the long hole, the bearing, each roller, etc. affects the roller position, and as shown in an exaggerated manner in FIG. The one conveyance roller 3 and the first pressure roller 4 are not parallel to the second conveyance roller 5 and the second pressure roller 6, and therefore the conveyance direction A by the first conveyance roller 3 and the first pressure roller 4 In some cases, the conveyance direction B by the second conveyance roller 5 and the second pressure roller 6 may be different, which may cause a reading accuracy defect.

Then, the conveying direction B by the second conveying roller 5
In the past, adjustment was made by changing the left and right applied pressure of the second pressure roller, but it is difficult to adjust the pressure setting of the spring and the conveyance direction, and it takes a lot of time for the adjustment. There was a drawback.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an original document feeding device which can easily adjust the feeding direction by the second feeding roller.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention makes it possible to adjust the mounting angle of the second pressure roller provided so as to be in pressure contact with the second transport roller with respect to the document transport direction. It is equipped with a configuration to be placed in.

[0008]

According to the present invention, the mounting angle of the second pressure roller can be adjusted as described above. However, since this mounting angle greatly affects the document transport direction by the second transport roller, the mounting of the second pressure roller is possible. By adjusting the angle, the document conveyance direction by the second conveyance roller and the second pressure roller can be easily adjusted to the conveyance direction by the first conveyance roller and the first pressure roller, and the reading accuracy can be improved.

[0009]

1 is a schematic plan view of a document feeder according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line X--X in FIG.
The same parts as those of the conventional example shown in FIGS. 3 to 5 are designated by the same reference numerals. In FIGS. 1 and 2, a first transport roller 3 and a first pressure roller 4 are disposed upstream of the reading optical axis 1, and a second transport roller 5 and a second pressure roller 6 are disposed downstream thereof. As in the conventional case, the first conveying roller 3 and the second conveying roller 5 have their respective shafts 3a and 5a interposed between bearings and the frame 1
It is attached at a predetermined position by attaching it to the holes 2 and 13. The first pressure roller 4 is also the same as the conventional one.
By attaching the shaft 4a through the bearing 14 to the elongated holes formed in the frames 12 and 13 in the vertical direction, the shaft 4a is held so as to be movable up and down, and is provided so as to be in pressure contact with the bearing 14. Elastic body 16 such as a pressure spring
And is pressed against the transport roller 3.

The second pressure roller 6 arranged on the downstream side is held by the adjustment fitting 20 unlike the conventional one. The adjustment fitting 20 has vertical support portions 20a at both ends thereof, and vertical holes are formed in the support portions 20a.
A bearing 15 mounted on the shaft 6a of the second pressure roller 6 is movably mounted. Further, the bearing 1 is attached to the supporting portion 20a
An elastic body 17 such as a pressure spring is attached so as to come into pressure contact with the pressure roller 5, so that the second pressure roller 6 can move up and down with respect to the adjustment fitting 20 and can be applied to the second transport roller 5. Is under pressure. The adjustment fitting 20 has a mounting portion 20b that horizontally projects at the center thereof.
0b is fixed to the support frame 21 spanning between the frames 12 and 13 on both sides by fixing screws 0 to be attached. Thus, the adjustment fitting 20 has the fixing screw 22.
By loosening the fixing screw 22, the fixing screw 22 can be moved in the direction of arrow C, and the mounting angle of the second pressure roller 6 can be adjusted.

With respect to the document feeder having the above-mentioned structure,
The operation will be described below. At the time of reading a document, the first transport roller 3 and the second transport roller 5 are rotationally driven by a driving device (not shown), and the document 2 is sandwiched between the first pressure roller 4 and the second pressure roller 6. A document that is conveyed by and passes over the reading glass 7 is read. Here, due to dimensional errors in manufacturing and assembling each component, the original conveyance direction by the first conveyance roller 3 and the first pressure roller 4 on the upstream side,
In some cases, the document transport directions of the downstream second transport roller 5 and the second pressure roller 6 do not exactly match. In that case, the fixing screw 22 is loosened, and the adjusting metal fitting 20 holding the second pressure roller 6 is slightly swung around the fixing screw 22 as shown by the arrow C, and the original of the second pressure roller 6 is rotated. Adjust the mounting angle with respect to the transport direction and tighten the fixing screw 22. As a result, the original conveyance direction by the second conveyance roller 5 and the second pressure roller 6 is changed without changing the mounting angle of the second conveyance roller 5, and the upstream first conveyance roller 3 and the first pressure roller 6 are changed. 4 can be made to coincide with the document conveyance direction. Good reading is performed by carrying and reading the document in this state.

[0012]

As is apparent from the above description, according to the present invention, the second pressure roller that is in pressure contact with the second transport roller is provided so that the mounting angle with respect to the document transport direction can be adjusted. By adjusting the mounting angle of the second pressure roller, the original conveying direction by the second conveying roller can be easily aligned with the conveying direction by the first conveying roller, and the reading accuracy can be improved. There is.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a document feeder according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line XX in FIG.

FIG. 3 is a schematic sectional view of a conventional document feeder.

FIG. 4 is a schematic plan view of the document feeder.

5 is a schematic side view of the document feeder.

FIG. 6 is a schematic plan view for explaining problems in the conventional document feeder.

[Explanation of symbols]

 1 Reading Optical Axis 2 Original 3 First Conveying Roller 4 First Pressing Roller 5 Second Conveying Roller 6 Second Pressing Roller 7 Reading Glass 8 Guide 17 Elastic Body 20 Adjusting Metal Fitting 21 Support Frame 22 Fixing Screw

Claims (1)

Claim: What is claimed is: 1. A first transport roller for transporting an original document, a first pressure roller in pressure contact with the first transport roller, and a second transport roller disposed downstream of the first transport roller for transporting the original document. And a second pressure roller in pressure contact with the second pressure roller, the second pressure roller being provided so that the mounting angle with respect to the document transportation direction can be adjusted.