JP2001088982A - Sheet carrying device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the work concerning the wiring processing of the cable of a detecting means to enhance the workability in assembling. SOLUTION: This device comprises a document reading carrying part 10 for carrying a sheet-like document and an operation part 40 that is a facing member fixed to the document reading carrying part 10, and the operation part 40 comprises a document edge sensor 2 for detecting a sheet carried by the document reading carrying part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus and an image reading apparatus which are provided in a device such as a facsimile, a copying machine, a scanner and the like which uses a sheet material or a sheet-shaped original.

[0002]

2. Description of the Related Art FIG. 7 shows a cross-sectional structure of a sheet-shaped document image reading section 100 in a conventional image reading apparatus.

In FIG. 1, a document G is placed on a document placing portion 101.
And a document conveying path P1 (two-dot chain line) sandwiched between the upper guide 103 and the lower guide 104 of the document conveying unit 102
Is transported.

When the leading edge of the document G comes into contact with the document edge detecting actuator 105 and rotates, the document edge sensor 1
Reference numeral 06 is configured to detect rotation of the document edge detection actuator 105.

A document edge sensor 106 detects the position of the leading edge of the document and reads the image information of the document.
In order to determine the timing of reading 07, the mounting position accuracy of the document edge sensor 106 is important.

Therefore, the document edge sensor 106 is mounted on the upper guide 103 of the same document transport section 102 to which the document edge actuator 105 is mounted by the positioning boss 108.

A cable 109 for transmitting a detection signal of the document edge sensor 106 is connected to an electric board 111 of an operation unit 110 disposed above the document conveyance unit 102, and a centralized cable (not shown) together with an operation signal of the operation unit 110 and the like. Is connected to a main body control unit (not shown).

The operation unit 110 is attached to the upper guide 103 of the original transport unit 102. When the jam of the original in the original transport unit 102 is cleared or the contact sensor 107 is cleaned, the operation unit 110 is centered on the rotation axis of the upper guide 103 (not shown). The document transport path P1 can be opened by rotating the operation unit 110 and the upper guide 103 which are integrated with the document feed path P1.

[0009]

However, in the above conventional example, when the document edge sensor 106 is attached to the upper guide 103, or when the cable 109 is connected to the electric board 111,
When the cable 109 is connected, it is necessary to keep the cable 109 longer than the shortest distance after assembly due to the problem of workability in operation.

Next, when the upper guide 103 is attached to the operation unit 110, the slack portion of the long cable 109 is clamped or fixed so as not to interfere with the rotating members such as the actuators and rollers constituting the document conveying unit 102. Wiring processing such as tape attachment is required, and the processing work is difficult, and improvement in assembly workability has been desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art. It is an object of the present invention to simplify a work related to a cable wiring process, and to improve a workability of assembling a sheet conveying apparatus and a document reading apparatus. An apparatus is provided.

[0012]

Means for Solving the Problems In order to achieve the above object, the invention according to the present application is directed to a sheet material conveying apparatus having a conveying means for conveying a sheet material and an exterior member fixed to the conveying means. Detection means for detecting the sheet material conveyed by the conveyance means is provided on the exterior member.

It is also preferable that the apparatus further comprises a positioning means for positioning the detecting means and the conveying means.

[0014] Holding means for holding the detection means and attaching to the exterior member while maintaining the degree of freedom of three-dimensional movement within a predetermined range, wherein the positioning means comprises:
It is also preferable to include a fitting member provided on the holding means and the transport means and fitted to each other.

An operating member which is displaced in contact with the sheet material conveyed by the sheet material conveying device is provided in the sheet material conveying path, and the detecting means detects the sheet material by detecting the displacement of the operating member. It is also suitable.

In the image reading apparatus, the above-mentioned sheet material conveying apparatus, image reading means for reading image information of a sheet-like document conveyed by the sheet material conveying apparatus,
An operation unit provided on an exterior member of the sheet material transporting device.

[0017]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a sheet-like original G as a sheet material.
FIG. 2 is an explanatory diagram of a cross-sectional configuration of an image reading unit 1 of an image reading apparatus (e.g., an apparatus that uses a sheet material or a sheet-shaped original such as a facsimile machine, a copying machine, and a scanner device) for reading image information. Document placement unit 50 serving as a transport device
And an operation section 40 as an exterior member fixed to the sheet material conveying means.

The document placing section 50 comprises a document placing auxiliary tray 52 attached to a document placing table 51, and a pair of sliders 53 for regulating the position of the document in the left-right width direction.

The original reading and transporting section 10 has an original transporting path P1.
The upper guide 6 and the lower guide 8, which are the upper and lower guides of the document transport path P1, are rotatably mounted near the document insertion opening of the upper guide 6. The document presence / absence detecting actuator 9, a separation roller 12 and a separation pad 13 for separating and transporting a plurality of documents G placed on the document placement unit 50 one by one, and a feeding roller 14 a and a feeding roller 14 b for transporting the document. Have.

A document edge detecting actuator 15 as a rotatable operating member with the feeding roller 14b as a fulcrum,
A contact sensor 16 as image reading means for reading image information, a white background plate 17 disposed opposite to the contact sensor 16, a paper discharge roller 18a for discharging a document, and a roller 18b are provided.

The separation roller 12 and the feeding roller 14
a, the paper discharge roller 18a is rotationally driven by a reading motor (not shown) and a reading driving unit.

The original placing section 50 is an original reading and transporting section 1.
It is fixed to 0.

An operation panel 40 is provided with operation keys 42 and a display section 43 on the surface of an operation section 40 which also serves as an exterior member. A tact switch 42a and an LCD are provided inside the operation section 40.
An electric board 44 on which a 43a is mounted is attached to the operation panel 41.

The electric board 44 further includes a document presence sensor 4
5 for detecting rotation of the document presence detection actuator 9.

The sensor base 3 is attached to the boss 46 of the operation panel 41 with screws 5, and the document edge sensor 2 as the detecting means is held by the sensor base 3 as the holding means. The document edge sensor 2 is connected to an electric board 44 by a cable 4.

Further, a document edge sensor 2, a sensor base 3
FIGS. 2 and 3 show the mounting boss 46 of the operation panel 41 from a direction perpendicular to the document conveyance path.

As shown, holes 3a,
The fitting member between the boss 3a and the bosses 46a and 46b of the operation panel 41 serves as positioning means, and fits each other.
The diameter of the holes 3a, 3b is larger than the diameter of the holes a, 46b, and the protruding height of the boss 46a is higher than the search for the hole 3a.

Accordingly, the sensor base 3 is connected to the operation panel with the screws 5.
, There is some degree of freedom in three directions: the direction of the document transport path P1 (−Y direction), the direction perpendicular to the document transport path P1 (X direction), and the direction perpendicular to the document transport surface (Z direction). (The degree of freedom of three-dimensional movement within a predetermined range is maintained).

On the other hand, as shown in FIGS. 4 and 5, the upper guide 6 and the operation panel 41 are arranged such that the hook 19 of the upper guide 6 is fitted into the fitting portion 47 of the operation panel, and the mounting hole of the upper guide 6 is formed. At 20, a screw 21 is attached to the boss 48 of the operation panel.

In the sensor base 3, the hole 22 and the boss 7 of the upper guide 6 are fitted, the Y and Z directions are positioned, and the X direction is also adjusted as shown in FIG. Positioned and supported.

Therefore, the document edge sensor 2 is accurately positioned and provided on the upper guide 6 by the positioning means for restricting the degree of freedom of the three-dimensional movement of X, Y and Z. The rotation of the actuator 15 can be detected very accurately.

In such a configuration, when the document G is set on the document table 51, the leading end of the document G comes into contact with the document presence detecting actuator 9 and the document presence detecting actuator 9 rotates, whereby the document presence sensor 45 is turned on. The presence or absence of the document G is detected.

When the transmitting or copying operation is performed by the operation unit 40, the separation roller 12 is rotated by a reading motor (not shown), and the original G is
Separated one by one.

Further, the feeding roller 14a and the feeding roller 14b
, The original G is transported in the original transport path P 1 sandwiched between the upper guide 6 and the lower guide 8, and the leading end of the original G comes into contact with the original edge detecting actuator 15 to rotate the original edge detecting actuator 15. The document edge sensor 2 detects.

The timing of the reading start position is determined by the detection signal, and the image of the original G is read by the contact sensor 16. The read original G is the discharge roller pair 1
It is discharged by rotation of 8a, 18b.

As described above, since the document edge sensor 2 is held by the sensor base 3 and the sensor base 3 is attached to the operation unit, the length of the cable 4 of the document edge sensor 2 is in the assembled state. The shortest distance is sufficient, and wiring work such as clamping or tape application is not required so as not to interfere with the rotating members such as the actuators and rollers which are the components of the document transport unit. Easy.

Further, the sensor base 3 is mounted on the operation panel 41 so as to be able to move to some extent freely in three axial directions.
When assembling the upper guide 6 and the operation panel 41, the sensor base 3
Can be accurately determined by the upper guide 6.

[0039]

According to the present invention as described above, the detecting means can be arranged without being attached to the transport means, so that it is not necessary to lengthen the cable attached to the detecting means, and the wiring of the cable is eliminated. The work relating to the processing can be simplified, and the workability of assembling the device can be improved.

Further, it is possible to accurately position the detecting means and the conveying means by the positioning means, so that the accuracy of detecting the sheet material and the accuracy of reading the image can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration explanatory view of an image reading unit of an apparatus to which the present invention is applied.

FIG. 2 is a detailed sectional view of a mounting portion of the sensor base.

FIG. 3 is a detailed sectional view of a mounting portion of the sensor base.

FIG. 4 is a detailed cross-sectional view of attachment of an operation unit and an upper guide.

FIG. 5 is a detailed cross-sectional view of attachment of an operation unit and an upper guide.

FIG. 6 is a detailed cross-sectional view of a fitting state between the sensor base and the upper guide.

FIG. 7 is an explanatory diagram of a cross-sectional configuration of an image reading unit in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image reading part 2 Document edge sensor 3 Sensor base 4 Cable 5 Screw 6 Upper guide 7 Boss 8 Lower guide 9 Document presence detection actuator 10 Document reading and conveying part 15 Document edge detection actuator 16 Contact sensor 40 Operation part 41 Operation panel 42 Operation keys 43 display section 44 electric board 45 document presence sensor 46 boss 47 fitting section 50 document placing section 51 document table G document P1 document transport path

Claims (5)

[Claims] 1. A sheet material transporting device comprising a transporting means for transporting a sheet material, and an exterior member fixed to the transporting means, wherein the detecting means for detecting the sheet material transported by the transporting means comprises the exterior A sheet conveying device provided on a member. 2. The apparatus according to claim 1, further comprising positioning means for positioning the detection means and the conveyance means.
The sheet material conveying device according to item 1. 3. A holding device attached to an exterior member while holding the detecting device and maintaining a degree of freedom of three-dimensional movement within a predetermined range, wherein the positioning device is configured to transfer the holding device to the holding device. 3. The sheet conveying apparatus according to claim 2, further comprising a fitting member provided on the means and fitted with each other. 4. An operation member, which is displaced by contacting a sheet material conveyed by the sheet material conveyance device, is provided in a sheet material conveyance path, and the detecting means detects the displacement of the operation member to thereby displace the sheet material. The sheet material conveying apparatus according to claim 1, wherein the sheet material is detected. 5. The sheet material transporting device according to claim 1, an image reading unit configured to read image information of a sheet-shaped document transported by the sheet material transporting device, and the sheet material. An operation unit provided on an exterior member of the transport device.