JPH02268559A - Original travel part releasing device - Google Patents

Abstract

PURPOSE:To open a part between a fractional piece and an automatic paper supply roller and a part between a reading roller and a contact image sensor by mounting the fractional piece on an opening/closing frame, and providing a releasing rib to release the contact image sensor. CONSTITUTION:The opening/closing frame 15 is provided in such a way that it can be rocked freely at opening and closing positions centering a fulcrum being positioned between the automatic paper supply roller 3 and the contact image sensor 7. Furthermore, a device is constituted in such a way that the fractional piece 4 and a fractional piece pressing spring 5 are held with the opening/closing frame 15, and the releasing rib 17 which presses the contact image sensor 7 in a direction to separate from the reading roller 6 when the opening/closing frame 15 is set at an open state is provided. in such a way, it is possible to separate the fractional piece 4 from the automatic paper supply roller 3 and to separate the image sensor 7 from the reading roller by depressing only by rocking the opening/closing frame 15 to the opening position, and to easily take out an original stagnated at the position due to the jamming of the original, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a document reading device such as a facsimile machine, and more specifically, to a document reading device such as a facsimile machine, and more specifically, a document reading device of the type that selects and feeds documents one by one and reads the documents with a contact image sensor. TECHNICAL FIELD The present invention relates to a document running unit release device for releasing a document so that a document can be easily removed from the document running unit in a document reading device.

Conventional technology Conventionally, in facsimile machines such as 7, a lens system is generally used in the document reading section, and a drive roller and a pinch roller are placed on both sides of the document reading position, and the document is pinched between these rollers and conveyed. It is configured to do this. In addition, a pinch roller system is attached to the opening/closing section, so in the event of a document jam, etc., by opening the opening/closing section, the document transport system can be separated and the document can be easily removed. (For example, see Japanese Patent Laid-Open No. 119567/1983).

On the other hand, in recent years, the use of contact image sensors for document reading has increased, and in this case, the contact image sensor is pressed against the reading roller that is driven and rotated, and the contact image sensor is pressed against the reading roller and the contact image sensor. It constitutes the document transport system. In this case, since the reading roller is connected to the drive system, it is not preferable to use a mechanism for moving the reading roller because the structure becomes complicated. Therefore, to separate the document transport system, the contact image sensor is separated from the reading roller using a release lever or the like (for example, JP-A-63-103550, JP-A-63-103).
No. 551, see Utility Model Application Publication No. 117153/1983).

Further, a document reading device is also known that includes an automatic paper feeder in close proximity to a reading roller and a contact image sensor. As shown in FIG. 3, this type of document reading device includes a document table 2 on which a large number of documents 1 are set, an automatic paper feed roller 3 disposed near the lower end of the document table 2, and an automatic paper feed roller 23 disposed near the lower end of the document table 2. a sorting piece pressing spring 5 that presses the sorting piece 4 made of a high friction material such as rubber, which is provided so as to be in contact with the sorting piece 4; a reading row 26 disposed downstream of the automatic paper feed roller 3; A close contact image sensor 7 arranged so as to be in contact with 6
, an image sensor frame 9 that holds the contact image sensor 7 swingably about a fulcrum 8, an image sensor pressing spring 10 that presses the contact image sensor 7 against the reading roller 6, and a sorting piece 4 and a sorting piece pressing spring. 5, an opening/closing part 12 that can swing around a fulcrum 11; a spring 13 that biases the opening/closing part 12 in the closing direction;
It has a stopper 14 and the like that regulates the closed position. Note that since the reading roller 6 is connected to a drive device (not shown), it is difficult to hold it in the opening/closing part 12, and normally it is not held in the opening/closing part 12 as shown in the figure. do not have.

The reading operation in the above device is performed as follows. That is, the document 1 on the document table 2 is separated one by one by the automatic paper feed roller 3 and the sorting piece 4 and sent downward, pressed against the reading roller 6 by the contact image sensor 7, and then moved downward by the reading roller 26. At the same time, the contact image sensor 7 reads the image. In addition, when a document jam occurs, the opening/closing section 12 is opened in the direction of the arrow to separate the automatic paper feed roller 3 and the sorting piece 4, and the contact image sensor 7 is released using the release lever (not shown) in the direction of the arrow. The operation was to move the paper in the same direction and separate it from the reading roller 6.

Problems to be Solved by the Invention However, with this configuration, in order to separate the document transport system in the event of a document jam or the like, it is necessary to open the opening/closing section 12 and move the sorting piece 4, and to move the close image sensor 7. There was a problem in that the operation was troublesome because the user had to perform a moving operation.

To solve this problem, the opening/closing part 12 and the close contact image sensor 7 may be connected by a link mechanism or the like, and the close contact image sensor 7 may be moved in the direction away from the reading roller at the same time as the opening/closing part 12 is opened. Therefore, a problem arises in that a complicated link mechanism must be provided.

The present invention has been made in view of the above-mentioned problems, and is a document reading device that uses an automatic paper feed roller and a contact image sensor. It is an object of the present invention to provide a thick paper running part release device capable of releasing a running part.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an opening/closing frame that can swing to open and close positions around a fulcrum located between an automatic paper feed roller and a contact image sensor, The opening/closing frame holds a sorting piece and a sorting piece pressing spring, and is further provided with a release rib that pushes the contact image sensor away from the reading roller when the opening/closing frame is placed in the open position. It is.

According to the above-described structure, the present invention can separate the sorting pieces from the automatic paper feed roller by simply swinging the opening/closing frame to the open position, and also push the contact image sensor to separate it from the reading roller. A document that is stuck in that position can be easily taken out.

Example The present invention will be explained in detail below.

1 and 2 are schematic sectional views showing an embodiment in which the present invention is applied to a document reading device of a facsimile. shows. Note that parts that are the same as those in the conventional example shown in FIG. 3 are designated by the same reference numerals. In FIGS. 1 and 2, 1 is a document, 2 is a document table, 3 is an automatic paper feed roller arranged at the lower end of the document table 2 and connected to a drive device (not shown), and 4 is an automatic paper feed roller. A sorting piece made of a high-friction material such as rubber and provided in contact with the paper roll 23; 5 a sorting piece pressing spring that presses the sorting piece 4 against the automatic paper feed roller 3; 6 an automatic paper feed roller 3, a reading roller arranged downstream of 3 and connected to a drive device (not shown); 7, a close-contact image sensor arranged so as to be in contact with this reading roller 6; 9, a close-contact image sensor 7 connected to The image sensor frame 10 is pivotally held at the center and is an image sensor pressing spring that presses the contact image sensor 7 against the reading roller 6. The document table 2, automatic paper feed roller 3, reading roller 6, image sensor frame 9, etc. are mounted at fixed positions.

Reference numeral 15 has 7 opening/closing frames, which open and close around a fulcrum 16 located between the automatic paper feed roller 3 and the contact image sensor 7 (the open position shown in FIG. 2 and the closed position shown in FIG. 1). It is provided so that it can swing.

A sorting piece 4 and a sorting piece pressing spring 5 are attached to this opening/closing frame 15.
is installed. Here, the opening/closing frame 15 is
When it is in the closed position shown in the figure, the sorting piece 4 is attached to the automatic paper feed row 23
When the opening/closing frame 15 is placed in the open position shown in FIG. 2, the sorting piece 4 is separated from the automatic sheet feeding row 23.

Further, the opening/closing frame 15 has release ribs 17 protruding from both sides of its lower end (outside the maximum original width). This release rib 17 allows the opening/closing frame 15 to be
When the opening/closing frame 15 is in the closed position shown in the figure, it is separated from the contact image sensor 7, but when the opening/closing frame 15 is in the open position shown in FIG. It is formed into a shape that can be 18 is an opening/closing frame pressing spring that urges the opening/closing frame 15 to the closed position, and 19 is a stopper that restricts the opening/closing frame 15 to the closed position.

The operation of the document reading device having the above configuration will be described below.

FIG. 1 shows a normal document reading operation.

In this state, the opening/closing frame 15 is in the closed position where the stopper 19 is pressed, the sorting piece 4 is pressed against the automatic paper feed roller 3, and the contact image sensor 7 is pressed against the reading row 26. The document 1 on the document table 2 is separated one by one by the automatic paper feed roller 3 and the sorting piece 4, and is fed between the close contact image sensor 7 and the reading roller 6, and is conveyed by the reading row 26 while being separated into close images. During reading by the sensor 7, if a jam occurs when the leading edge of the document passes through the reading section, the document will be placed between the automatic paper feed row 23 and the sorting piece 4, and in contact with the reading row 26 to form an image. Because it is chewed in two places between y and 7,
Even if I try to pull it out from the entrance, I can't pull it out.

Therefore, when the opening/closing frame 15 is lifted upward and swung to the open position shown in FIG. Also apart from the opening/closing frame 1
The release rib 17 at the lower end of 5 pushes the contact image sensor 7,
Separate from reading row 26.

As a result, the document transport system is separated, and jammed documents can be easily removed.

Effects of the Invention As is clear from the above description, the present invention has the following advantages: In addition to attaching a sorting piece to an opening/closing frame that can swing between open and closed positions,
A release rib is provided to release the contact image sensor, so by simply opening the opening/closing frame, you can open between the sorting piece and the automatic paper feed roller, and between the reading roller and the contact image sensor, allowing the document to run smoothly. The release operation of the system is extremely simple.As the device does not require a complicated mechanism such as a link mechanism, it is sufficient to simply provide a release lever at the lower end of the opening/closing frame, so the device is simple. It has the effect of

[Brief explanation of drawings]

Figures 1 and 2 are schematic cross-sectional views showing an embodiment in which the present invention is applied to a facsimile document reading device. FIG. 3, which shows the state, is a schematic cross-sectional view showing a conventional document reading device. DESCRIPTION OF SYMBOLS 1... Document, 2... Original table, 3... Automatic paper feed roller, 4... Sorting piece, 5... Sorting piece pressing spring, 6...
・Reading roller, 7...Contact image sensor, 9...
Image sensor frame, IO... Image sensor pressing spring, 15... Opening/closing frame, 16... Fulcrum, 1
7...Release rib, 18...Opening/closing frame pressing spring,
19... Name of stopper agent: Patent attorney Shigetaka Awano and others 1 Multi-tube diagram / 2

Claims (1)

[Claims] An automatic paper feed roller and a reading roller each provided at a fixed position, a sorting piece that contacts the automatic paper feeding roller, a sorting piece pressing spring that presses this sorting piece, and a close contact image sensor that contacts the reading roller. , an image sensor pressing spring that presses the contact image sensor, the sorting piece and the sorting piece pressing spring are held, and the image sensor is opened and closed about a fulcrum located between the automatic paper feed roller and the close contact image sensor. A document running section release device comprising: a swingable opening/closing frame; and a release rib on the opening/closing frame that pushes the contact image sensor away from the reading roller when the opening/closing frame is placed in the open position. .