JP2002274694A - Document feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance of an automatic document feeder (ADF) in the ADF automatically incorporating documents and reading their image information. SOLUTION: An inner guide 23 provided on a platen glass 8 and guiding the feeding of the document and an inner guide 22 guiding the documents from the platen glass 8 to a paper discharge tray 4 are attached to separated rotary shafts 35a and 39a respectively, the inner guides 22 and 23 are connected together via connectors 25 and 25, the inner guide 23 is turned by interlocked with the turning of the inner guide 22, and the upper part of the platen glass 8 is released so that the maintenance such as cleaning is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an automatic document feeder (ADF) attached to a copier, a facsimile, or an image forming apparatus having both functions.

[0002]

2. Description of the Related Art Conventionally, a copying machine, a facsimile, or the like, or an image forming apparatus having both functions,
An automatic document feeder (ADF) is additionally provided. This A
The document set in the DF inlet is automatically loaded into the ADF by the start operation, makes a U-turn along the transport path, passes over the platen glass at the reading position, and reads the image information. And was discharged from the paper discharge port below the intake port.

[0003] This type of ADF is divided into several covers along the document conveying path, and when a document jam or the like occurs, the cover is opened and maintenance is performed.
These covers also serve as guide surfaces for the document transport path.The guide cover provided on the platen glass, the guide cover that guides the document from the platen glass to the paper exit, and It is composed of an upper cover and the like for guiding a document, and is rotatably attached to different shafts. A transport roller for feeding a document is attached to these covers, and the transport rollers are arranged at appropriate positions along the document transport path with each cover closed.

However, in the above configuration, since the transport roller is attached to each of the rotating covers, there is a problem in that the rigidity of the ADF, the drive transmission to each roller, and the position of the roller are not constant. Feed unevenness is likely to occur. Therefore, the transport roller is supported by a fixed frame on the side of the ADF, and further, a guide cover is pressed against the platen glass so that the feeding unevenness is prevented particularly on the platen glass. In this way, the reading accuracy is improved by reducing the unevenness of the document feeding.

[0005]

However, when a paper jam occurs near the platen glass or the like, the upper cover of the ADF must be opened, the guide cover must be opened, and the guide cover behind the ADF must be opened. The process was rather troublesome. In view of this point, an object of the present invention is to facilitate maintenance in the ADF such as cleaning of a platen glass.

[0006]

The present invention uses the following means in order to solve the above problems.
That is, the guide member for the document provided on the platen glass and the guide member for guiding the document from the platen glass to the discharge tray are rotatably mounted on different shafts, respectively. The member and the guide member are connected via a connector, and the guide member is rotated in conjunction with the rotation of the guide member to move the guide member toward and away from the platen glass.

Further, the connecting member is detachably attached to at least one of the guide member and the guide member.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a facsimile machine 1. 1 is a perspective view of the facsimile machine 1, FIG. 2 is a perspective view of the ADF 2, and FIG.
FIG. 4 is a side view of the ADF 2 with the DF cover 21 closed, and FIG.
2, FIG. 5 is a side view of the ADF 2 with the ADF cover 21 and the inner guides 22 and 23 opened, FIG. 6 is a side view of the coupler 25, and FIG.

In the following description, an arrow F in FIG.
The front, rear, left and right positions of each structure will be described with the direction being the front. In addition, the front, rear, left and right positions of each structure in other drawings are also in accordance with FIG.

As shown in FIGS. 1 and 3, at an upper end of the facsimile apparatus 1, an automatic document feeder (hereinafter, "ADF") 2 for automatically feeding a document to a reading apparatus is provided.

The originals placed on the paper feed tray 3 are separated one by one and taken into the original transport path 9 in the ADF 2, and the image information of the originals is read by the reading device on the apparatus main body side at the platen glass 8. After being read, the sheet is discharged from the sheet discharge port 2 b and stacked on the sheet discharge tray 4. Then, the read image information is converted into an electric signal and transmitted to a destination via a telephone line.

As shown in FIGS. 2 to 5, the ADF 2
Is configured to be openable, so that maintenance can be performed from above the apparatus such as when a paper jam occurs in the document conveyance path 9.

As shown in FIG. 2, the ADF 2 includes a frame body such as an ADF main body 20, an ADF cover 21, and inner guides 22 and 23, which form a guide surface of the document transport path 9, and a frame along the document transport path 9. Rollers 30 31 32 arranged
33, 34, 35, 36, 37, 38, etc., the ADF cover 21 and the inner guide 22.
Reference numeral 23 is attached to the ADF main body 20 so as to be vertically rotatable.

As shown in FIG. 3, the ADF cover 21
The DF body 20 is pivotally supported by a rotation fulcrum shaft 29 at the rear end, and one of the inner guides 22 and 23 has one end thereof,
The rollers 35 are rotatably supported by a frame on the side of the ADF body 20. The rollers 35 are engaged with rotating shafts 35a and 39a, and are mounted in a detachable configuration.

Further, the other rollers 30, 31, 32, 33
Are also attached to the frames 28, 28 on both sides of the ADF body 20, so that the rollers 30, 31, 32, 33, 34 are also provided.
.. Are arranged at fixed positions, so that the document can be fed accurately without causing unevenness in document feeding.

The inner guides 22 and 23 are
When the inner guide 22 is rotated by the connecting tools 25 at both ends thereof, the inner guide 2
3 also rotates.

As shown in FIG. 6 and FIG.
Reference numeral 5 denotes a substantially hook-shaped plate, which comprises a hook portion 25a and a body portion 25b, and a hole 25 on the inner surface of the body portion 25b.
c is formed.

On the other hand, as shown in FIG. 3, a protruding portion 22a is provided at the rear end of one side surface of the inner guide 22, and a protruding portion is formed at the front end portion of both side surfaces of the inner guide 23. 23a are formed. Although illustration is omitted, the other side surface of the inner guides 22 and 23 is also similarly illustrated.
Protrusions 22a and 23a are formed respectively.

With such a configuration, the trunk 25 of the connecting member 25
The hole 25c of b is fitted into the protrusion 23a of the inner guide 23, and the hook 25a is hooked on the protrusion 22a of the inner guide 22. Thus, the connecting tools 25
Can be easily attached to the inner guides 22 and 23. Also, by removing the hook portion 25a from the protruding portion 22a, the connecting member 25 can be easily removed.

The ADF 2 is constructed as described above,
When performing the maintenance in 2, the ADF cover 21 is first opened as shown in FIG. 4, and the inner guide 22 is rotated upward as shown in FIG. At this time, the connector 25 engaging with the protrusion 22a of the inner guide 22 is pulled up, whereby the protrusion 23a of the inner guide 23 fitted with the connector 25 is also pulled up, and the inner guide 23 is turned upward. Be moved. Thus,
The upper area of the platen glass 8 is easily opened, and the rear surfaces (lower surfaces) of the inner guides 22 and 23 and the upper surface of the platen glass 8 can be seen from above the apparatus. The maintainability can be improved.

Further, if the connecting members 25 are removed from the inner guides 22, 23, the inner guides 22.
23 can be detached from each of the rotating shafts 35a and 39a, whereby the upper part of the platen glass 8 is more widely opened and maintenance becomes easier.

[0022]

As described above, the present invention has the following advantages. That is, claim 1
A guide member for guiding a document provided on the platen glass and a guide member for guiding the document from the platen glass to the discharge tray are rotatably mounted on different shafts, respectively. Is connected via a connecting tool, the guide member is rotated in conjunction with the rotation of the guide member, and the guide member is brought into contact with and separated from the platen glass, so that the upper portion of the platen glass is easily opened, The guide member, the back surface (lower surface) of the guide member, and the upper surface of the platen glass can be viewed from above the apparatus, so that the jam clearance and cleaning can be easily performed, and the maintenance performance can be improved.

Further, as in claim 2, the connecting member is
Since the connecting member is detachably attached to at least one of the guide member and the guide member, the connecting member can be easily removed from the guide member or the guide member. By removing the member or the guide member, it is possible to open the area above the platen glass more widely, and it is possible to more easily perform maintenance such as jam clearance and cleaning.

[Brief description of the drawings]

FIG. 1 is a perspective view of a facsimile machine 1;

FIG. 2 is a perspective view of ADF2.

FIG. 3 shows the ADF with the ADF cover 21 closed.
2 is a side view.

FIG. 4 shows the ADF 2 with the ADF cover 21 opened.
Side view.

FIG. 5: ADF cover 21, inner guide 22
The side view of ADF2 in the state which opened 23.

FIG. 6 is a side view of the connector 25;

FIG. 7 is a front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 ADF 8 Platen glass 21 ADF cover 22 Inner guide 22a Projection part 23 Inner guide 23a Hole part 25 Connector 25a Hook part 25b Body part 25c Projection part 35a Rotation axis 39a Rotation axis

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C058 AB06 AD03 AE09 AF04 AF15 DA04 DA11 DA21 DA34 2H076 AA58 BA02 BA10 BA24 BA36 BA39 BA47 3F101 FA01 FB17 FD02 FE02 FE08 FE15 LA02 LA05 LB02 5C062 AA02 AA05 AD17 AD12 BA02 BA20 FB08 NA01 XA01

Claims (2)

[Claims] A guide member for a document provided on a platen glass and a guide member for guiding a document from a platen glass to a discharge tray are rotatably mounted on different shafts, respectively. A document conveying device, wherein the guide member is connected to the member via a connecting member, and the guide member is rotated in conjunction with the rotation of the guide member to move the guide member toward and away from the platen glass. 2. The document feeder according to claim 1, wherein the connecting member is detachably attached to at least one of the guide member and the guide member.