JPH0423749A - Document carrying device for facsimile - Google Patents

Abstract

PURPOSE:To disslve jam of the document at once by providing guide channels in the direction for making guide pins, which are attached in both end sides of one guide plate, to come close to the other guide plate and separating from its, and providing springs for energizing the guide pins elastically in the direction for coming close to the other guide plate. CONSTITUTION:When jam is generated at any part of a carrying passage 3, an upper end 41 of an upper side guide plate 30 is pushed. Guide pins 31, 32 thereby move guide channels 37, 38 to the opposite lower side guide plate direction, resisting the elastic energizing force of springs 39, 40, and the upper side guide plate 30 is separated from a lower side guide plate 1 with this movement, and a support 35 of a pinch roller 35 is pushed up by a back surface of the upper side guide plate 30 to separate the pinch roller 34 from a feeding roller 3, and a pad 6 is pushed up by the upper side guide plate 30 to be separated from a paper feeding roller 2. Under the usual condition, the upper side guide plate 30 is positioned close to the lower side guide plate at a maximum with the springs 39, 40, and since the slide direction is specified by the guide channels 37, 38, the upper side guide plate 30 is moved to the direction for separating from the lower side guide plate 1 by only pushing the upper side guide plate 30.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention automatically pulls out a transmission document from a facsimile document tray, supplies the same document to a document reading unit to read it, and ejects the read document. The present invention relates to a document conveyance device, and more specifically, to a facsimile document conveyance device that can easily handle jams during document conveyance.

[Conventional technology]

A facsimile machine optically reads a document, converts it into an electrical signal, transmits it via a telephone line, and restores the image of the document onto the paper by the receiving facsimile machine. It is equipped with two conveyance devices: a paper conveyance device for image formation. Of these, the paper conveyance device for image formation is composed only of conveyance rollers because most use roll paper, but for originals, sheet paper In most cases, it is necessary to separate the documents one by one and transport them to the document reading section. Therefore, on the document conveying side, most of them are equipped with two separate rollers: a roller that separates the documents and conveys them to the document reading section, and a roller that discharges the documents conveyed by these rollers so as not to jam them. An example of this is shown in FIG.

In the figure, the document conveying device includes a document tray (not shown) on which a document to be transmitted by facsimile is placed, and a first (lower) guide plate 1 provided at the leading end of the document tray.
, a paper feed roller 2 , second and third guide plates 4 and 5 that are provided on the downstream side of the paper feed roller 2 in the conveyance direction and constitute a conveyance path 3 , and a conveyance plate corresponding to the third guide plate 5 . It is mainly composed of a feed roller 7 and a pinch roller 8 provided in the path 3, a housing 9 on the upper side, and a housing 10 on the lower side. A light source 11 irradiates the document with light in a gap in a part of the conveyance path 3 between the paper feed roller 2 and the feed roller 7, and the reflected light R of this light is detected by a reading element such as C0D13, and the document is read. Do a read.

The paper feed roller 2 is supported by a paper feed roller shaft 12 provided on the first guide plate 1, and is rotationally driven by a motor (not shown). A document holding pad 6, which is swingably supported by a support shaft 14, is in sliding contact with the paper feed roller 2, so that the document can be pressed against the paper feed roller 2. Therefore, the second guide plate 4 is pivotably supported by a support shaft 15 at its lower end, and is always urged toward the paper feed roller 2 by a pressure spring (not shown).

The feed roller 7 is located on the downstream side of the second guide plate 5 in the document conveyance direction, and is rotationally driven by a motor (not shown) via a feed roller shaft 16. At a position facing the feed roller rough, a pinch roller 8 is provided which rolls in pair with the feed roller 7 and pinches and conveys the document. The pinch roller 8 is rotatably supported by a pinch roller shaft 17, and the pinch roller shaft 17 is further rotatably supported by the third guide plate 5. The third guide plate 5 is
It is swingably supported by a support shaft 18, and is always elastically biased clockwise in the drawing about the support shaft 18 by a pressure spring (not shown).

The lower housing 10 is fixed and forms the bottom and sides of the facsimile, and the upper housing 9 is at least releasably attached to the lower housing IO.

Note that a roll of thermal paper TP is also placed on the front side of the second guide plate 4.

A thermal head H and a platen roller P are respectively disposed above it, and the thermal paper extended from the roll paper TP is pressed against the thermal head H by the platen roller P, allowing the thermal head H to write. .

In the document feeder configured as described above, when a document is placed on the document tray 1 and pushed toward the back, that is, toward the paper feed roller 2, the document is set when it hits the pad 6 and the paper feed roller 2. become a state. When set at this position, a document set sensor (not shown) detects that the document is set, and the paper feed roller 2 begins to rotate counterclockwise in the figure based on this detection output. As a result of this rotation, only one raw scale located at the bottom is pulled out by the paper feed roller 2, and is conveyed to the conveyance path 3 side while being pressed against the paper feed roller 2 by the pad 6.

On the other hand, when the document begins to be conveyed, the light source 11 is turned on and illuminates the document. Then, the reflected light R is read by the CCD 13. In this process, when the leading edge of the document is caught in the nip between the feed roller 7 and the pinch roller 8, the document is also transported by the feed roller rough. In this way 1
Originals are conveyed and read one by one, and the original images converted into electrical signals one by one are sent to a facsimile machine at the destination.

By the way, during the above-mentioned conveyance process, the document is not passed from the paper feed roller 2 side to the feed roller 7 side, but instead is passed through the conveyance path 3.
Sometimes it gets stuck inside.

Generally, a general document misfeed including this document jam is called a document jam, but when this document jam occurs, it is necessary to check whether there is a document in the conveyance path 3, and if there is a document, remove it.

In the above document conveying device, in order to check and remove the document, first move the second guide plate 4 upward from the free end side.
That is, it rotates in the direction of arrow A.

As a result, the pad 6 separates from the paper feed roller 2, and the document conveyance path 3 around the paper feed roller 2 is released. Therefore, when a document is jammed around the paper feed roller 2, the document can be taken out from between the released pad 6 and the paper feed roller 2.

However, if there is a jam on the feed roller 7 side and the same feed reroller 7 side, the document jam cannot be cleared simply by releasing the second guide plate 4. Therefore, in such a case, the third The guide plate 5 is rotated downward, that is, counterclockwise about the support shaft 18. As a result, the pinch roller 8 is separated from the feed roller 7, and the conveyance path 3 is released.

Then, the document can be pulled out when the conveyance path 3 is released.

[Problem to be solved by the invention]

In this way, in the document conveying device as described above, the second guide plate 4 and the third guide plate 5 must be released to take out the document depending on the jammed position. In other words, if a jam occurs across both paper feed rollers, the jam cannot be cleared at once.

The present invention has been made in view of the actual state of the prior art, and an object of the present invention is to provide a facsimile document conveying device that is easy to use and can clear jams with just a few operations.

[Means to solve the problem]

In order to achieve the above object, the present invention provides guide pins attached to both ends of one guide plate, guide grooves for guiding these guide pins toward and away from the other guide plate, and guide pins attached to both ends of one guide plate. A spring is provided that elastically biases each pin in a direction closer to the other guide plate, and the directions of the guide pins and guide grooves and the biasing force of the springs are such that the upper end of the one guide plate approaches the other guide plate. The guide pins are arranged so that when pressed in the direction away from the other guide plate, each guide pin moves the guide groove in the direction away from the other guide plate.

[For production]

According to this, when an X document jam occurs, if the upper end of one guide plate is pushed in the direction away from the other guide plate, the guide pins of one guide plate will move away from the other guide plate along the guide groove. The upper guide plate moves away from the other guide plate, and eventually the entire upper guide plate separates from the other guide plate as a whole. This separation operation causes the paper feed roller and pad, which were in contact with each other, and the feed roller and pinch roller to separate, respectively, and the conveyance path is released. In this way, it becomes possible to take out the jammed original.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. In the following description, each part that can be considered to be equivalent to the above-mentioned conventional example is given the same reference numeral, and redundant description will be omitted as appropriate.

FIG. 1 is a schematic diagram showing the internal structure of a facsimile document conveying device according to this embodiment. This embodiment is a modification of the conventional document conveying device as follows.

■ The second guide plate 4 is extended until it crosses the placement position of the feed roller 7 and the pinch roller 8 to form one guide plate (upper guide plate) 30, and the guide pin 31 is formed at least below the feed roller 7. protrude laterally.

(2) The guide pin 32 is made to protrude laterally above the mounting portion of the pad 6 for preventing double feeding.

■The third guide plate 5 is omitted.

(2) The feed roller 33 is provided on the above-mentioned pinch roller 8 side, and the pinch roller 34 is provided on the above-mentioned feed roller 7 side.

■When the spindle 35 of the pinch roller 34 is on the back side (opposite the conveyance path side) of the upper guide plate 30 and the upper guide plate 30 is moved in a direction away from the first (lower) guide plate mentioned above. , is provided at a position where it can abut a part of its back surface and retreat from the conveyance path 3.

(2) The support shaft 15 of the second guide plate 4 is omitted.

(2) Two pairs of guide grooves 37 and 38 as shown in FIG. 3 are provided on the side plate 36 of the lower housing 10.

■The guide pins 31 and 32 mentioned above are placed in the guide grooves 37 and 38.
loosely fit into each.

(2) A spring 39.degree. 40 is provided to elastically bias the upper guide plate 30 in the closing direction, that is, in the direction toward the lower guide plate 1.

[Phase] The elastic biasing force and biasing direction of the springs 39 and 40 and the direction of the guide grooves 37 and 38 are such that when the upper guide plate 30 is pushed away from the lower guide plate 1, the guide pin 31 or 32 is It is chosen so that no central keyment occurs.

When deformed in this way, the upper guide plate 30 faces the lower guide plate 1 and is slidably provided with respect to the guide pins 31 and 32 and the support shaft 31, and the upper end 41 of the upper guide plate 30 extends to the document insertion slot. , can be integrally moved toward and away from the lower guide plate 1 against the elastic force of the springs 39 and 40. By this approaching/separating operation, the support shaft 35 of the pinch roller 34 is pushed up by the back surface of the upper guide plate 30, and the pinch roller 34 is separated from the feed roller 33.
Further, the pad 6 is also pushed up by the upper guide plate 30, making it possible to separate the pad 6 from the paper feed roller 2.

All other parts not specifically described are configured in the same manner as in the prior art example described above.

In the facsimile document feeder according to this embodiment, when a document is placed on the document tray and inserted along the lower guide plate 1 until it hits the paper feed roller 2, the paper feed roller 2 is moved in the same manner as in the conventional example described above. The originals are separated one by one from the lowest one in the bundle and fed along the conveyance path 3. When the document reaches the nip position between the feed roller 33 and the pinch roller 34, the feed roller 33 and the pinch roller 3
A document is added by 4, the document is conveyed by both, and the document is discharged from the document discharge port. The state at this time is as shown in FIG.

By the way, if a document jam occurs during any of the transport steps [3], the upper end 41 of the upper guide plate 30 is pushed as shown in FIG. This results in guide pins 31, 32 and springs 39.
The guide grooves 37 and 38 are moved in the direction opposite to the lower guide plate against the elastic biasing force of 40, and as a result of this movement, the upper guide plate 30 naturally separates from the lower guide plate 1, and as described above, the pinch roller 34 and the pad 6 are evacuated from the conveyance path 3.

This evacuation operation causes the feed roller 33 and paper feed roller 2 to
A gap is created between the document and the paper, and the clamping force on the document is released. Therefore, by pushing the upper guide plate 30, the document can be pulled out from anywhere, regardless of where the jam occurred. Note that the upper guide plate 30 is pushed in the direction away from the lower guide plate 1, but in the normal state, the upper guide plate 30 is at a position as close to the lower guide plate 1 as possible by the springs 39 and 40, and , the sliding direction is regulated by the guide grooves 37 and 38, so the upper guide plate 3 simply
0, the upper guide plate 30 moves away from the lower guide plate 1. In this embodiment, the upper guide plate 30 corresponds to one guide plate, and the lower guide plate 1 corresponds to the other guide plate.

〔Effect of the invention〕

As explained above, according to the present invention, there are guide pins attached to both ends of one guide plate, and guide grooves that guide these guide pins toward and away from the other guide plate, A spring is provided that elastically biases each guide pin in a direction closer to the other guide plate, and furthermore, the directions of the guide pins and guide grooves and the biasing direction of the springs are such that the upper end of the one guide plate approaches the other guide plate. The guide pins are arranged in such a way that when pressed in the direction away from the other guide plate, each guide pin moves the guide groove in the direction away from the other guide plate. The guide plate is separated from the other guide plate side, and the pad and pinch roller are separated from the paper feed roller and the feed roller, respectively, so that the entire conveyance path is released.
- Document jam removal can be performed at the same time.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a facsimile document conveying device according to an embodiment of the present invention, FIG. 2 is a perspective view of essential parts showing the state of the lower casing and upper guide plate, and FIG. 3 is a non-jammed document conveying device. FIG. 4 is an explanatory diagram of the operation showing the state during processing, FIG. 4 is an explanatory diagram of the operation showing the state during jam processing, and FIG. 5 is a schematic configuration diagram of a conventional facsimile document conveying device. In the figure, 1 is the lower guide plate (the other guide plate), 2 is the paper feed roller, 3 is the document transport path, 6 is the pad, 10 is the lower housing, 30 is the upper guide plate (one guide plate). ), 31.3
2 is a guide pin, 33 is a feed roller, 34 is a pinch roller, 35 is a spindle of the pinch roller, 36 is a side plate of the lower housing, 37.38 is a guide groove, 39.40 is a spring, 41 is an upper guide This is the top of the board. Patent applicant: Fujitsu General Agent
Patent Attorney Takuya Ohara

Claims (1)

[Claims] (1) A document conveyance path formed by at least a pair of guide plates for ejecting the transmitted document from the document tray through the document reading section, and a document holding pad on the upstream side of the document conveyance path in the document conveyance direction of the document reading section. A feed roller that pinches and conveys the document between the two rollers, and a feed roller that presses and conveys the document with a pinch roller on the downstream side in the conveyance direction. In a facsimile document feeder that reads the document and outputs the scanned document, there are guide pins attached to both ends of one of the guide plates, and guide pins that guide the guide pins toward and away from the other guide plate. and a spring that elastically biases each of the guide pins in a direction closer to the other guide plate, and the direction of the guide pins and the guide groove and the biasing direction of the spring are aligned with the upper end of the one guide plate. The facsimile document is characterized in that the guide pins are arranged so that each of the guide pins moves the guide groove in the direction away from the other guide plate when the part is pressed in the direction away from the other guide plate. Conveyance device.