JP3867504B2 - Document feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an automatic document feeder (ADF) attached to a copying machine, a facsimile, or the like, or an image forming apparatus having both functions.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an automatic document feeder (ADF) is attached to an upper portion of a copying machine, a facsimile, or the like or an image forming apparatus having both functions.
The original set in the ADF take-in port is automatically taken into the ADF by the start operation, makes a U-turn along the conveyance path, passes through the platen glass as the reading position, and the image information is transferred. It was read and discharged from the discharge port below the intake port.
[0003]
This type of ADF is divided into several covers along the document transport path, and when a document jam or the like occurs, the cover is opened to perform maintenance.
These covers also serve as a guide surface for the document transport path. The guide cover is provided on the platen glass, the guide cover guides the document from the platen glass to the discharge port, and from the feed port to the vicinity of the platen glass. It consists of an upper cover or the like that guides the document, and is rotatably attached to different shafts.
Further, a transport roller for feeding the document is attached to these covers, and the transport rollers are arranged at appropriate positions along the document transport path with each cover closed.
[0004]
However, in the above configuration, since the conveyance roller is attached to each rotating cover, unevenness in the feeding of the document is caused by problems such as the rigidity of the ADF, drive transmission to each roller, and the position of the roller is not constant. Likely to happen. Therefore, the transport roller was supported by a fixed frame on the side of the ADF, and a guide cover was pressed against the platen glass. In particular, an improvement was made so as not to cause uneven feeding on the platen glass. In this way, the document feeding unevenness is reduced and the reading accuracy is improved.
[0005]
[Problems to be solved by the invention]
However, when a paper jam occurs near the platen glass, the upper cover of the ADF must be opened, the guide cover must be opened, and then the guide cover behind the ADF must be opened. It was.
This invention makes it a subject to make the maintenance in ADF easy, such as cleaning of platen glass, in view of this point.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention uses the following means.
That is, as described in claim 1, after the originals placed on the paper feed tray are separated one by one and taken into the original conveyance path, the image information of the original is read at the position of the platen glass, and then from the paper discharge port. In the document conveying device to be ejected, the document conveying device is attached on a platen glass, and a rotation shaft of a driving roller is attached to a frame on both sides of the main body of the document conveying device . An original guide member provided on the platen glass and a guide member for guiding the original from the platen glass to the discharge port are respectively used as rotation shafts of different drive rollers. Attach to rotatably configure each protrusion on the side surface of the guide member and the guide member, and connecting the protrusion portion and the protrusion portion through a connector, the connector is substantially hook In plate consists of a hook portion and the body portion to form a hole in the inner surface of the body portion, the rotation of the guide member, in conjunction with the guide member via the coupling pivot it is one in which the upper vicinity of the front Symbol platen glass is configured to be opened.
[0007]
According to a second aspect of the present invention, the hook portion of the coupling tool is detachable with respect to at least one of the guide member or the projecting portion of the guide member, and the guide is removed by removing the coupling tool. The member and the guide member can be detached from the rotating shaft .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the facsimile machine 1.
1 is a perspective view of the facsimile machine 1, FIG. 2 is a perspective view of the ADF 2, FIG. 3 is a side view of the ADF 2 with the ADF cover 21 closed, and FIG. 4 is a view of the ADF 2 with the ADF cover 21 opened. 5 is a side view of the ADF 2 with the ADF cover 21 and the inner guides 22 and 23 being opened, FIG. 6 is a side view of the connector 25, and FIG.
[0009]
In the following description, the front / rear and left / right positions of each structure will be described with the arrow F direction in FIG. 1 as the front. In addition, the front / rear / left / right positions of the structures in the other drawings are the same as those in FIG.
[0010]
As shown in FIGS. 1 and 3, an automatic document feeder (hereinafter referred to as “ADF”) 2 that automatically feeds a document to a reading device is attached to an upper end of the facsimile machine 1.
[0011]
The originals placed on the paper feed tray 3 are separated one by one and taken into the original conveyance path 9 in the ADF 2, and the image information of the original is read by the reading device on the apparatus body side at the position of the platen glass 8. Thereafter, the paper is discharged from the paper discharge port 2 b and stacked on the paper discharge tray 4. Then, the read image information is converted into an electric signal and transmitted to the other party via a telephone line.
[0012]
As shown in FIGS. 2 to 5, the ADF 2 is configured to be openable, and is configured to allow maintenance from above the apparatus when a paper jam occurs in the document transport path 9.
[0013]
As shown in FIG. 2, the ADF 2 is disposed along the document transport path 9 and a frame body such as an ADF main body 20, an ADF cover 21, inner guides 22, and 23 that form a guide surface of the document transport path 9. The rollers 30, 31, 32, 33, 34, 35, 36, 37, 38, etc., and the ADF cover 21 and the inner guides 22, 23 are rotatable up and down with respect to the ADF main body 20. It is attached.
[0014]
As shown in FIG. 3, the ADF cover 21 is pivotally supported by a rotation fulcrum shaft 29 at the rear end of the ADF main body 20, and one inner guides 22 and 23 each have one end thereof attached to a frame on the side of the ADF main body 20. It is attached in a detachable configuration by engaging with the rotation shafts 35a, 39a of the rollers 35,.
[0015]
Further, the rotation shaft of the other roller 35, 36, 37, 38, ... are also provided attach the ADF body 20 both sides of the frame over beam, thereby 35 - 36 - 37 - 38 - Each B over La .. is placed at a fixed position, and can be fed accurately without causing uneven feeding of the document.
[0016]
And the inner guides 22 and 23 are connected by connecting tools 25 and 25 at both ends thereof, and when the inner guide 22 is rotated, the inner guide 23 is also rotated.
[0017]
As shown in FIGS. 6 and 7, the connector 25 is a substantially fishhook-like plate, and includes a hook portion 25 a and a trunk portion 25 b, and a hole portion 25 c is formed on the inner surface of the trunk portion 25 b. Yes.
[0018]
On the other hand, as shown in FIG. 3, a protruding portion 22 a is provided at the rear end portion of one side surface of the inner guide 22, and the protruding portion 23 a is formed at the front end portions of both side surfaces of the inner guide 23. Has been. Although illustration is omitted, the protruding portions 22a and 23a are similarly formed on the other side surfaces of the inner guides 22 and 23, respectively.
[0019]
With such a configuration, the hole portion 25c of the body portion 25b of the connector 25 is fitted into the protruding portion 23a of the inner guide 23, and the hook portion 25a is hooked on the protruding portion 22a of the inner guide 22. In this way, the couplers 25 and 25 can be easily attached to the inner guides 22 and 23.
Moreover, it has the structure which can remove the connector 25 easily by removing the hook part 25a from the protruding part 22a.
[0020]
When the ADF 2 is configured as described above and maintenance is performed in the ADF 2, first, the ADF cover 21 is opened as shown in FIG. 4, and the inner guide 22 is rotated upward as shown in FIG. Move. At this time, the connecting tool 25 that engages with the protruding portion 22a of the inner guide 22 is pulled up, whereby the protruding portion 23a of the inner guide 23 that is fitted with the connecting tool 25 is also lifted, and the inner guide 23 rotates upward. Moved. Thus, the vicinity of the upper part of the platen glass 8 is easily opened, and the back (lower surface) of the inner guides 22 and 23 and the upper surface of the platen glass 8 can be looked into from the upper part of the apparatus. It is possible to improve maintenance.
[0021]
Furthermore, if the coupling tools 25 and 25 are removed from the inner guides 22 and 23, the inner guides 22 and 23 can be detached from the respective rotary shafts 35a and 39a, thereby opening the upper vicinity of the platen glass 8 more widely. This makes maintenance easier.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
That is, as described in claim 1, after the originals placed on the paper feed tray are separated one by one and taken into the original conveyance path, the image information of the original is read at the position of the platen glass, In the document conveying device to be ejected, the document conveying device is attached on a platen glass, and a rotation shaft of a driving roller is attached to a frame on both sides of the main body of the document conveying device . An original guide member provided on the platen glass and a guide member for guiding the original from the platen glass to the discharge port are respectively used as rotation shafts of different drive rollers. Attach to rotatably configure each protrusion on the side surface of the guide member and the guide member, and connecting the protrusion portion and the protrusion portion through a connector, the connector is substantially hook Condition A plate made of a hook portion and the body portion, the inner surface of the body portion to form a hole, by rotation of the guide member, rotation of conjunction of the guide member through the connector allowed, since the upper vicinity of the front Symbol platen glass is configured to be opened briefly near the upper platen glass is opened, the guide member from above the apparatus, the rear guide member (lower surface), and the upper surface of the platen glass It can be looked into, and can be easily jammed, cleaned, etc., and can be improved in maintainability.
[0023]
According to a second aspect of the present invention, the hook portion of the coupling tool is detachable with respect to at least one of the protrusions of the guide member or the guide member, and the guide is removed by removing the coupling tool. Since the member and the guide member can be detached from the rotating shaft , the connector can be easily detached from the guide member or the guide member, and the guide member or the guide member can be removed if necessary. Thus, the upper vicinity of the platen glass can be opened more widely, and maintenance such as jam processing and cleaning can be performed more easily.
[Brief description of the drawings]
FIG. 1 is a perspective view of a facsimile machine 1. FIG.
FIG. 2 is a perspective view of ADF 2. FIG.
FIG. 3 is a side view of the ADF 2 with the ADF cover 21 closed.
FIG. 4 is a side view of the ADF 2 with the ADF cover 21 open.
FIG. 5 is a side view of the ADF 2 with the ADF cover 21 and inner guides 22 and 23 opened.
6 is a side view of the connector 25. FIG.
FIG. 7 is a front view of the same.
[Explanation of symbols]
1 Facsimile device 2 ADF
8 Platen glass 21 ADF cover 22 Inner guide 22a Protruding part 23 Inner guide 23a Hole part 25 Connecting tool 25a Hook part 25b Body part 25c Protruding part 35a Rotating shaft 39a Rotating shaft

Claims (2)

In the document conveying device that separates the documents placed on the sheet feeding tray one by one and takes them into the document conveying path, and after the image information of the document is read at the platen glass position,
The document conveying device is attached on the platen glass, and the rotation shafts of the driving rollers are attached to the frames on both sides of the document conveying device. configured, the document guide member provided on the platen onto glass, Installing a guide member for guiding the original from the platen glass to said outlet, the rotatable to the axis of rotation of separate drive rollers ,
Protrusions are formed on the guide member and the side surfaces of the guide members, respectively, and the projections and the protrusions are connected to each other via a connector. The connector is a substantially fishhook-shaped plate, Consisting of a body part, forming a hole in the inner surface of the body part,
Wherein by rotation of the guide member, the connecting member is rotated in conjunction with the guide member through the front SL document feeder, characterized in that near the upper platen glass is configured to be opened. The hook part of the connector is detachable with respect to at least one of the protrusions of the guide member or the guide member, and the guide member and the guide member are detached from the rotation shaft by removing the connector. 2. The document conveying device according to claim 1, wherein the document conveying device is capable of being used.

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