JPH02123051A - Paper sheet supplier - Google Patents

Abstract

PURPOSE:To easily take out paper sheets stopped during conveyance by providing a means for releasing a roller from pressing condition for the paper sheet in accordance with detecting a cover for its opening condition. CONSTITUTION:In the case of a document being stopped, when a conveying part is opened, a set switch detects this conveying part for its opened condition, feeding a signal of the conveying part opened to a control part. The control part receives this signal sending a predetermined signal to a plunger solenoid 75 energized. In this way, a plunger part 76 is sucked in a direction A, turning a lever 77 in a direction B with a supporting point 78 serving as the center, and a supporting point axis 91 is rotated in a direction E through a link 79. Following this rotation, a press releasing plate 82, fixed to the supporting point axis 91 by a stop screw, is moved in the end part in a direction F, depressing a resist roller 48 in its bearing part 83. By depressing this bearing part 83, the resist roller 48 is released from pressing an opposed roller 88, and the document, stopped during conveyance, is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Application Field) The present invention relates to a filter paper sheet feeding device used in, for example, an electronic copying machine.

(Prior Art) Automatic document feeding devices used in electronic copying machines etc. use a plurality of rollers to feed documents.
The document is conveyed while being held between a pair of opposing rollers.

(Problem to be Solved by the Invention) However, in such an automatic feeding device, when the feeding of the original stops for some reason while the original is being fed, the following inconvenience occurs.

That is, since the document is being fed, the document is being held between the pair of rollers. Therefore, even if you open the automatic document feeder and try to take out the document, the document is held between the pair of rollers, so if you try to forcefully take it out, you will be able to take it out, but if you try to forcefully remove the document, it will not work. The impact was large and it was difficult for users to use.

For this reason, normally, the document is removed after the automatic document feeder is once opened and the clamp is removed using a specially provided suppression release lever.

However, using a specially provided suppression release lever is inconvenient for the user and requires an unnecessary configuration of the device, which is not desirable.

Therefore, the present invention eliminates the drawbacks of the conventional paper sheets and makes it possible to easily take out the paper sheets without the need for scanning the suppression release lever etc. even if the conveyance of the paper sheets is stopped midway. The purpose is to provide a type supply device.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a paper sheet feeding device that clamps a pair of rollers involved in conveyance when a document cover or the like is in an open state. It is characterized by releasing the pressed state.

Furthermore, when taking out paper sheets from the apparatus, the pinching state and the pressing state of the pair of rollers involved in conveyance are released (function). When taking out the paper sheets, the paper sheets are released from the pressure of the pair of rollers without any special operation by the user, so that the paper sheets can be taken out very smoothly.

(Example) Next, an example of the present invention will be described in detail. This embodiment relates to a document conveying device used in an electronic copying machine or the like. This document conveying device, as shown in FIG.
It includes a supply unit 41 that sequentially separates and supplies the set originals one by one. Original supply side (exit side) of this supply section 41
A reversing section 42 is provided at the top. This reversing section 42 is
If necessary, turn the document upside down. A transport section 43 is provided on the document supply side (exit side) of the reversing section 42 .

The conveyance unit 43 conveys the supplied document to the exposure position on the document table 5, and discharges the document from the document table 5 after the exposure is completed. The transport section 43 is provided so as to be openable and closable in correspondence with the document table 5, and also serves as a document table cover.

The supply section 41 includes a paper feed tray (original receiving section) 44 in which a plurality of original documents are set in a stacked state. This paper feed tray 44
The originals set above are taken out one by one by a pickup roller 45.

The document taken out by the pickup roller 45 is sent (supplied) into the apparatus by a paper feed roller 46 (delivery roller). At this time, a separation roller 47 that rolls into contact with the paper feed roller 46 co-feeds a plurality of original documents one by one. The document sent out by the rollers 46 and 47 is conveyed while being aligned by a pair of registration rollers 48.

The document conveyed by the pair of registration rollers 48 is received by the pair of feed rollers 49, and then transferred to the conveyance section 43.
supplied to The document fed by the pair of feed rollers 49 is first fed out at a portion 51 of a guide path 50 provided between the pair of registration rollers 48 and the pair of feed rollers 49.

Furthermore, an empty switch 52 is provided on the paper feed roller 46 side of the paper feed tray 44 for detecting the presence or absence of a document jam. A first jam switch 53 is provided in front of the registration roller pair 48, and a size switch 54 for detecting the size of the document sheet is provided behind the registration roller pair 48. A post-registration switch 55 is provided in front of the feed roller pair 49.

The reversing section 42 includes a pair of reversing rows 56, 57, and 58. The pair of reversing rollers 56, 57, and 58 receive the document reversely fed from the conveyance section 43, reverse it from front to back, and transfer it to the supply section 43.
1 to the middle of the guide path 50. At this time, the original document is conveyed along the guide path 59. This guide route 59 and guide route 5
0 is the reversal stop position 60. A reversing switch 61 is provided in front of the reversing roller pair 57.

The reversing section 42 and the portions of the supply section 41 other than the paper feed tray 44 are covered by a reversing section cover 62 that can be opened and closed. Opening and closing of the reversing section cover 62 is performed using the cover switch 6.
Detected by 3. As mentioned above, the document is transferred to the transport section 4.
3. The material is selectively transported to the reversing section 42, which is realized by the gate guide 74. More specifically, a gate guide 74 (not shown) is driven by a gate guide 74, which is normally set in a horizontal state, and guides the document from the supply section 41 to the conveyance section 43. When the gate guide 74 is set upward, the document is placed in the reversing section 4.
It is guided to the guide path 59 of No. 2.

The conveyance section 43 includes a conveyance belt 66. This conveyance belt 66 is an endless belt that is stretched between conveyance rollers 64 and 65, and conveys the document along the document table 5. The conveyor belt 66 is pressed onto the document table 5 by a presser roller 67 . The document conveyed by the conveyance belt 66 is discharged by a pair of discharge reversing rollers 68 and a pair of discharge rollers 70 .

The former paper discharge reversing roller pair 68 reverses the document on the document table 5 from front to back. By this pair of rollers 68 and 70, the conveyance path of the document is changed significantly and the document is ejected. This discharged document is received by the discharge tray 71. Further, a second jam switch 72 is provided behind the pair of paper discharge reversing rollers 68.
is provided. Like the reversing section cover 62, the conveying section 43 can also be opened and closed, and the opening and closing of the conveying section 43 is detected by the set switch 73.

In the automatic document feeder configured as described above, the document is held between the pair of conveyance rollers and the like when the document is conveyed.

Here, for example, when the original document has stopped as shown in FIG. 4, the conveying section 43 is opened. Then, the set switch 73 detects the open state of the transport section 43 and sends a signal indicating "between transport sections" to a control section 90 (not shown). Upon receiving this, the control section 90 controls the plunger solenoid 75 shown in FIG.
A predetermined signal is sent to set the Blanchatsu ltunoid 75 to the excited state.

As a result, the plunger solenoid 75 attracts the plunger portion 76 in the A direction. Accordingly, the lever 77 rotates in the B direction about the fulcrum 78.

By rotating this lever 77, the link 79 is moved in the C direction.
And the fulcrum shaft 91 is rotated in the E direction.

On the other hand, a pressure release plate 82 is fixed to the fulcrum shaft 91 with a set screw 81. Therefore, when the fulcrum shaft 9] rotates in the E direction, the end of the pressure release plate 82 moves in the F direction. This operation pushes down the bearing portion 83 of the registration roller 48.

As shown in FIG. 1, the bearing portion 83 of the registration roller 48 is fitted into a groove of the frame 86, and is slidable in the CD direction in the figure. However, during normal operation, the bearing part 83 is pulled up in the C direction by the pressure spring 85 applied to the bearing part 83 through the frame 86 described above.

Therefore, since the bearing part 83 is pulled up in the C direction,
The registration roller 48 is pressed by the opposing roller 88.

However, as described above in E, when the press release plate 82 moves in the direction F due to the open state of the conveyance section, the bearing section 83 of the registration roller 48 is pushed down. Therefore, the registration roller 48
The suppression of the opposing roller 88 will be released.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment.

For example, in the above embodiment, the mechanism for releasing the suppression with respect to the registration roller 48 has been explained 17, but the same mechanism can be used for the pair of feed rollers 49 or the paper feed roller 64, which are relay rollers, to release the suppression independently. Good too.

Moreover, they can be performed simultaneously.

[Effects of the Invention] As described above, according to the present invention, when paper sheets stop during paper sheet feeding, it is possible to release the pressure on the stopped document with a simple operation, and It becomes easy to take out the device, and the trouble for the user of the device can be reduced. Furthermore, since removal can be performed smoothly, the load on the device is reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the release mechanism of the relay registration roller, FIG. 2 is a front view showing the release mechanism of the relay registration roller, and FIG. 3 is a side view showing the configuration of the document transport device in detail. FIG. 4 is a side view showing the document stopped state. 43... Conveyance unit 44... Paper feed tray 70... Paper ejection roller 73... Set switch 82... Suppression release plate

Claims (2)

[Claims] (1) A supply table on which paper sheets are set, a take-out means for taking out the paper sheets set on the feed table one by one, and a roller to place the paper sheets taken out by this means at a predetermined position. In the paper sheet feeding apparatus, the paper sheet feeding device includes a conveyance means for conveying the paper sheets, and a discharge means for discharging the paper sheets after being conveyed by the conveyance means, the conveyance means covering the conveyance path of the paper sheets, and a means for detecting that the cover is in an open state; and a means for detecting a pressing state of the roller against the paper sheet in accordance with the detection of the open state of the cover by the means. A paper sheet feeding device comprising: means for releasing the sheet. (2) A supply table on which paper sheets are set, a take-out means for taking out the paper sheets one by one from the supply table, and a roller to convey the paper sheets taken out by this means to a predetermined position. In a paper sheet supply device comprising a conveyance means and a discharge means for discharging the paper sheets after being conveyed by the conveyance means, means for instructing to take out the paper sheets from the paper sheet supply device. and means for releasing the pressing state of the roller against the paper sheet when the removal of the paper sheet is instructed by this means.