JP2793877B2 - Paper feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device for feeding sheets one by one from a supply unit and sending the sheets to a processing unit.

[Conventional technology]

In a paper sheet processing machine that sequentially processes paper sheets, for example, a facsimile machine that sends a document to a reading processing unit and sends a document for transmission to a reading processing unit to perform reading and transmission processing, such as a counting machine that sends sheets to a counting processing unit and counts. On the sending side of the paper sheet supply unit, a paper sheet feeding device configured to feed out paper sheets one by one is provided. 2. Description of the Related Art A conventional kind of feeding device includes a feeding roller that is positioned on a feeding unit sending side and is rotationally driven in a sheet feeding direction by a driving device, and a member that is close to and opposed to a peripheral surface of the feeding roller. While feeding one sheet in contact with the peripheral surface of the roller, simultaneous feeding of the second and subsequent sheets is prevented. For example, in the apparatus disclosed in Japanese Utility Model Publication No. 60-10982, a feeding roller (feeding roller) and a guide having a concave arc-shaped guide surface facing the peripheral surface thereof are provided, and two guides are provided on the guide surface. A flexible projection is provided to prevent simultaneous feeding of paper sheets.

[Problems to be solved by the invention]

However, in this type of conventional apparatus, as the feeding of the paper sheets is repeated, a feeding error such as a shift of the paper sheets, meandering, or the like may occur. That is, in this type of apparatus, sheets are fed one by one at regular intervals by, for example, intermittently driving the feed roller. However, one sheet is fed with the rotation of the feed roller. When the class is being fed, the second and subsequent sheets may shift in the feeding direction. In this case, even if the flexible protrusions are provided to prevent simultaneous feeding, the sheets are only pressed with a restoring force corresponding to the deformation, so that the drawn sheets are pulled. It is inevitable that the next sheet will be displaced and displaced to such an extent that it partially bites between the feeding roller and the flexible protrusion. In addition, the sheets are tilted and meandered with such a shift movement. Then, as the feeding operation is repeated, deviation and meandering in the feeding direction gradually increase. For this reason, the interval and direction of the sequentially fed paper sheets become non-uniform, and there is a possibility that the processing of the paper sheets may be hindered.

In view of such circumstances, the present invention prevents the simultaneous feeding of two sheets, and returns the remaining sheets to a proper alignment state each time the sheets are fed one by one. An object of the present invention is to provide a paper sheet feeding device capable of reliably preventing misalignment and meandering.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a feeding mechanism including a feeding roller disposed on the delivery side of a sheet feeding unit and a sheet pressing unit facing the peripheral surface of the feeding roller. A sheet feeding device configured to feed sheets one by one from a sheet feeding unit, comprising: driving means for driving the feeding roller so as to be able to rotate forward and reverse; Is urged toward the feed roller peripheral surface, and is swingably supported by a support shaft parallel to the feed roller, so that the paper sheet holding portion is along the peripheral surface of the feed roller. A feeding regulating member that swings in accordance with the forward / reverse rotation of the feeding roller, and a paper sheet feeding operation performed by rotating the feeding roller forward, and the feeding roller after feeding a predetermined amount of one sheet. After reversing, the feeding operation of the next sheet is performed. So that is obtained by a control means for controlling said drive means.

[Action]

According to the above configuration, at the time of the feeding operation in which the feeding roller is driven in the normal rotation direction, the sheets in contact with the peripheral surface of the feeding roller are fed, and the feeding regulating member is moved along with the rotation of the feeding roller. After the sheet is fed by a predetermined amount, the remaining sheet is fed by the reverse rotation of the feeding roller and the accompanying swinging of the feeding control member toward the sheet feeding side. It is pulled back to the side and realigned. By these operations, every time the paper is fed,
Realignment and sorting of paper sheets can be obtained.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the feeding device of the present invention. In these figures, a feeding mechanism for feeding out the paper sheets 1 one by one from the paper sheet supply unit 2 includes a sheet supply unit 2.
The feeding roller 5 is disposed on the feeding side of the feeding roller 5 and is driven by a driving mechanism described later. The feeding roller 5 has a sheet pressing portion 11 facing the peripheral surface of the feeding roller 5 and is located above the front portion of the feeding roller 5. And a feed-out regulating member 10. The sheet supply unit 2 includes an inclined sheet support plate 3 and an upper side plate 4 opposed to the inclined sheet support plate 3 so as to accommodate the stacked sheets 1 in an inclined state and guide the stacked sheets 1 to a delivery side. It is configured. Cutouts 3a, 4a are formed in the two plates 3, 4 at locations corresponding to the feeding roller 5 and the feeding regulating member 10, and guides 3b, 4b extending forward in the feeding direction of the feeding mechanism are connected. . The paper sheet fed by the feeding mechanism is sent to a processing unit that performs processing (for example, a reading process described later) of the paper sheet according to the application via the guide units 3b and 4b. The processing unit is provided with a take-up roller 6.

As shown in FIG. 2, the feed-out regulating member 10 of the feed-out mechanism includes a swinging plate 13 swingably supported by a support shaft 12 parallel to the feed-out roller 3. The paper sheet holding portion 11 is fixed to the sheet. The swinging plate 13 has an elongated hole 14 formed on the base end thereof, which is engaged with the support shaft 12, and is allowed to move in the forward and backward directions with respect to the feeding roller 5 within the range of the elongated hole 14. It can swing around. A sheet holding section 11 is provided between the spring holder 15 which is located around the swinging plate 13 and abuts on the support shaft 12 and the sheet holding section 11.
Further, a spring 16 for urging the swinging plate 13 toward the feeding roller 3 is provided.

In this manner, with the leading end of the paper sheet pressing portion 11 being in close contact with the peripheral surface of the feeding roller 5, the feeding regulating member 10 extends over a predetermined range of the peripheral surface of the feeding roller 5 in accordance with the forward / reverse rotation of the feeding roller as described later. It is configured to swing.
The paper sheet holding section 11 is formed in a substantially triangular shape when viewed from the side, and its top 11a faces the outer periphery of the feeding roller 3, and one side of the top 11a is inclined toward the paper sheet supply section. It extends upward to form a paper sheet regulating surface 11b.

As shown in FIG. 1, the feed roller 5 of the feed mechanism and the take-up roller 6 of the processing section are driven by separate step motors 7 and 8 via gears and the like (not shown). It has become. The step motor 7 constitutes driving means for driving the feed roller 5 so as to be able to rotate forward and backward,
In accordance with the control signal, driving in the normal rotation direction and driving in the reverse rotation direction corresponding to the paper sheet feeding direction are performed.

The step motors 7 and 8 are controlled by a control circuit 20 as control means. Signals from various detection elements and the like are input to the control circuit 20 to check the operation start conditions and operation timings of the feeding mechanism and the processing unit. For example, the presence of paper sheets in the paper sheet supply unit 2 is detected. From the first detection switch 21, the second detection switch 22 for detecting sheets in the path between the feed roller 5 and the take-up roller 6, and the start switch 23 for a process start designation operation. I have. Then, the control circuit 20 causes the feeding mechanism to feed out the paper sheet based on the detection of the presence of the paper sheet in the paper sheet supply unit, and responds to the arrival of the paper sheet to the processing unit. Pickup roller 6
Each step motor 7, 8 so that
Control. In particular, as for the control of the feeding mechanism, as will be described in detail later with reference to a time chart, first, the feeding roller 5 is rotated in the normal direction to cause the feeding operation of the paper sheet, and the paper sheet is moved by a predetermined amount. After being fed out and being taken up by the take-up roller 6, the stepping motor 7 is controlled so that the take-out roller 5 is once rotated in reverse, and then the next sheet is fed out.

The operation of the paper sheet feeding device of this embodiment will be described with reference to FIGS. 3 and 4. FIG.

In a state in which a plurality of sheets 1 are stacked and accommodated in the sheet supply unit 2, first, the feeding roller 5 is driven to rotate in the normal rotation direction. As a result, as shown in FIG. 3, the lowermost sheet 1 in contact with the peripheral surface of the feed roller 5 is fed out from between the feed roller 5 and the sheet pressing section 11, and While the paper sheet holding unit 11 is kept along the peripheral surface of the feeding roller 5, the feeding regulating member 11 moves in the feeding direction from the basic position (two-dot chain line in FIG. 3) with the rotation of the feeding roller 5. It swings to a predetermined position on the front side (solid line in FIG. 3). In this feeding operation, 2
The end of each sheet 1 after the first sheet is the regulating surface of the sheet holding section 11.
It is regulated so that simultaneous delivery is prevented by contacting 11b. In particular, if the paper sheet holding portion 11 is formed as in the embodiment shown in the drawing, the angle between the regulating surface 11b of the paper sheet holding portion 11 and the peripheral surface of the feeding roller 5 gradually increases with the swing. As a result, the contact angle between the sheet 1 and the regulating surface 11b is increased, so that the frictional force is sufficiently increased, and the effect of preventing the simultaneous feeding is enhanced. Can be

After the sheet 1 is fed out by a predetermined amount by the above-mentioned feeding operation and reaches the state where it is picked up by the pulling-up roller 6, the feeding roller 5 is driven so as to rotate in the reverse direction as shown in FIG. At this time, the fed paper sheet 1 is not pulled back because it is held by the take-up roller 6, and is drawn out with the rotation of the take-up roller 6. On the other hand, with the reverse rotation of the feed roller 5, the feed restricting member 10 swings from a predetermined position on the front side in the feed direction (two-dot chain line in FIG. 4) to a state where it returns to the basic position (solid line in FIG. 4). This operation causes the second and subsequent sheets 1 to be realigned. In other words, even if a part of the second and subsequent sheets 1 may be caught between the feeding roller 5 and the sheet pressing portion 11 during the feeding operation, the reverse rotation of the feeding roller 5 causes As the feeding regulating member 10 swings in the returning direction, the paper 1 is pulled back to the supply unit 2 side, and as the feeding roller 5 rotates in the reverse direction, the feeding roller 5 and the paper pressing unit 11 Paper leaves come out from between. In this way, the effect of eliminating the jamming of the second and subsequent sheets 1 and the effect of sorting can be obtained.
The sheets are realigned correctly.

Then, after the realignment, the feeding operation of the next paper sheet 1 is performed, so that each paper sheet 1 is fed without meandering or the like.

FIG. 5 shows a specific example in the case where the above-mentioned feeding device is applied to a facsimile. The facsimile shown in this figure is of a simple type that is connected to an existing telephone. An operation unit (not shown) having a starter switch and the like is provided on the upper surface of the main body 30. An insertion slot 31 for paper sheets (documents for transmission) opens above the rear of the
The paper supply unit 2 is connected to the insertion opening 31. The insertion slot 31 is opened and closed by a lid 32 which also serves as a support for a document for transmission.

Inside the main body 30, a feeding mechanism including a feeding roller 5 and a feeding regulating member 10 is provided on the sending end side of the paper sheet feeding unit 2, and in front of the feeding mechanism, a feeding processing unit is provided. A take-up roller 6 and a close contact type image sensor (CIS) 33 which is in close contact with the take-up roller 6 are provided. And
When the paper fed by the feeding mechanism passes between the take-up roller 6 of the processing unit and the CIS 33, an image is read and transmission processing is performed. It is to be sent to 34. Feeding roller 5, feeding control member 10, step motors 7, 8, control circuit (not shown in FIG. 4), first and second detection switches 21, 22
1 are constructed in the same manner as in FIG. In addition to such a transmission system, a thermal paper roller 35, a thermal head (TPH) 36 for transferring a received image to thermal paper derived from the roller 35, and a TPH roller
A receiving system including a 37 and a step motor 38 for driving the TPH roller 37 is also provided inside the main body 30.

FIG. 6 shows an example of the operation timing of the step motors 7 and 8 controlled by the control circuit when applied to the facsimile. According to this example, first, when the first detection switch 21 is turned ON by the paper sheets being stored in the supply unit 2, the time point t ₁ at which the first detection switch 21 is switched to the ON state.
After the set time T ₁ from a feed (for feeding roller driving)
Is driven in the normal rotation direction, and the feeding operation is started. Then, the tip of Repetitive out the paper sheet from the time when the second detection switch 22 reaches the position of the second detection switch 22 is switched to ON (lapse of time T _2), further to the take-off roller 6 Number of setting steps (time
When the feeding step motor 7 is driven only by T ₃ ), the feeding step motor 7 is stopped for a relatively short time T ₄ , and the image processing (take-up roller driving) step motor is stopped. 8 is driven.

Subsequently, the step motor 7 for feeding is driven in the reverse direction by a predetermined number of steps (time T ₅ ), whereby the sheets are realigned by the operation shown in FIG. 4, and then, The feeding step motor 7 is stopped. On the other hand, the step motor 8 for image processing, in the start operation Okonawaru previous step, is stopped from being driven by a small amount during the time T _4, thereby, pulling the processor Ri roller 6 and CIS33 Is set in a preparation state in which the leading end of the paper sheet is held therebetween. Then, at time t ₂ the start switch is turned ON by a start operation, by a step motor 8 for image processing is driven, the processing of the first sheet is started.

After the start of this processing, the time t when the first sheet passes the second detection switch 22 and the second detection switch is turned off.
_In step ₃ , the feeding step motor 7 is driven in the normal rotation direction to start the feeding operation of the second sheet, and the driving of the image processing step motor 8 is continued for a predetermined amount. When the class passes through the processing section, the step motor 8 for image processing is stopped. Then, the forward rotation → stop → reverse rotation → stop of the stepping motor 7 for feeding is performed in the same manner as in the case of the first sheet, while the image processing until the paper sheet reaches the processing unit and passes through the processing unit. The step motor 8 is driven. As long as the first detection switch is ON, these operations are repeated, so that a process of sequentially feeding and reading the sheets from the supply unit is automatically performed. When the paper in the supply unit runs out, the first detection switch 21 is turned off as shown by a two-dot chain line in FIG. 6, and the subsequent feeding operation is stopped accordingly.

The paper sheet feeding device of the present invention can be applied to various applications in which paper sheets are fed one by one from a supply unit and processed in addition to the facsimile shown in the above example. The processing unit that processes the processed paper sheets may adopt a structure according to the application. Further, the drive timing and the like of the feeding roller 5 in the apparatus of the present invention are not limited to those in the above embodiment.
The feeding roller 5 may be reversed after the entire amount of the sheet is fed.

〔The invention's effect〕

As described above, the present invention has a driving unit that drives the feeding roller so that the feeding roller can be rotated in the normal and reverse directions, and has the paper sheet pressing unit on the leading end side, is urged toward the feeding roller peripheral surface, and A feeding control member that is swingably supported by a parallel support shaft, and a control unit that controls the driving unit; the feed roller is rotated forward to feed one sheet by a predetermined amount; Since the feeding roller is rotated in the reverse direction, every time a sheet is fed out one by one by the reverse rotation of the feeding roller after feeding by a predetermined amount and the swinging of the feeding regulating member in accordance with the rotation, The reordering and sorting functions of the sheets can be obtained, and the slippage and meandering of the sequentially fed sheets can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the paper sheet feeding device of the present invention, FIG. 2 is a perspective view of a feeding control member, FIG. 3 and FIG. FIG. 5 is a cross-sectional view of a main part showing an example in which this apparatus is applied to a facsimile, and FIG. 6 is a time chart showing an example of operation timing of a driving means and the like. DESCRIPTION OF SYMBOLS 1 ... Paper sheet, 2 ... Paper sheet supply part, 5 ... Feeding roller, 7
… Step motor (drive means), 10… feed-out regulating member,
11 ... paper sheet holding part, 12 ... spindle, 20 ... control circuit.

Claims (1)

(57) [Claims] 1. A feeding mechanism comprising a feeding roller disposed on the delivery side of a paper feeding unit and a paper pressing unit opposed to a peripheral surface of the feeding roller. A sheet feeding device for feeding sheets one by one, comprising a driving means for driving the feeding roller so as to be capable of normal and reverse rotation, and a sheet pressing section on a leading end side, and a feeding roller peripheral surface. , And swingably supported by a support shaft parallel to the feed roller, and the paper sheet holding portion swings with the forward / reverse rotation of the feed roller in a state along the peripheral surface of the feed roller. A feeding regulating member that moves and a paper feeding operation is performed by rotating the feeding roller forward;
Control means for controlling the driving means so as to perform a feeding operation of the next paper sheet after the paper sheet is fed out by a predetermined amount and then the feeding roller is rotated reversely. Leaf feeding device.