JPS5922826A - Sheet discharge mechanism - Google Patents

Abstract

PURPOSE:To make a pile of sheets certainly deliverable piece by piece with a simple mechanism, by getting the rear end part of a sheet fed by a feed member in a state that its front end part is pressed down with a pressing member whereby having the sheet curved, and then delivering the curved sheet one by one upon releasing the press. CONSTITUTION:When a sheet 2 is discharged, first a separation roller 19 is rotated and a topmost sheet 2 contacting the separation roller 19 by dint of pressing force of each of springs 17 is only fed in the direction of discharge. At this time, since the front end part of the sheet 2 is held between a pressing member 20 and a sheet mounting block 18, the topmost sheet 2' is formed into being curved and thereby separated from the second sheet 2 downward. Next, a discharge roller 21 and each of feed rollers 23 and 23' are rotated respectively, while the pressing member 20 is withdrawn from the surface of the sheet 2 whereby the topmost sheet 2 alone is delivered. And at a point when the tip end of the delivered sheet 2 is detected by sensors 22 and 22', the separation roller 19 is stopped, and likewise at that point that the rear end part of the sheet 2 is detected, these rollers 21, 23 and 23' aforesaid are all stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sheet discharging mechanism, and in particular to an OO technology relating to a sheet discharging mechanism that can reliably separate and discharge sheets stacked in a storage section one by one. Background In printers, copiers, or banknote handling devices, sheets of paper or banknotes handled by the device are stored in a storage section (hopper).
The sheets stored in 3, which are collectively stored in K, are fed out one by one by the sheet ejection mechanism and ejected.

0 Conventional technology and problems A conventional sheet ejection mechanism is shown in FIGS. 1 and 2.

Figure 1 shows sheets 2 stacked horizontally in a hopper 1.
In order to feed out the sheets 2 one by one from the bottom, that is, from the lowest sheet, the sheets 2 are pressed vertically downward by the weight 3 of 2 stacked sheets. In other words, the gate 4 and the gate row 25 form a dimensional gap with a slight margin in the thickness of one sheet by using the gate 4 and the gate roller 5. This gap allows the discharge row 27 to Among the sheets transported by the rollers, the sheets other than the lowest sheet are prevented from being fed out.In this case, the main sheet is fed out by the feeding rows 26 and 6'. 7.

However, in the above method, the gate 4 and the gut roller 5
The setting and adjustment of the gap between the two is incorrect. However, the leading edge of the sheet passing through the gate 4 is often curved or bent, and there is a drawback that poor ejection, jamming, etc. are likely to occur.

On the other hand, the sheet dispensing mechanism shown in FIG. 2 dispenses the sheet 2 from above, that is, from the topmost sheet, into a box shape.

At the end of sheet 2 is #! This pressing force is applied by C1 to which the feed roller 12 is in contact, which pushes up the sheet 2 above the hole <1'.On the other hand, the feed roller 12 is It is pressed against the spring 13.

With this force configuration, when the shut-off row 212 is rotationally driven by the motor 15, only the uppermost sheet passes through the separate member 14 and is fed out. The fed sheet follows a conveyance path formed by guides 10 and 11, and is further discharged by conveyance rollers 8 and 9. However, in the method described above, as the topmost sheet is fed out, the second sheet is Separate member 1 at the tip
4 and the row 212, a pinching condition occurs. As a result, when the rear end of the uppermost sheet passes between the separating member 14 and the roller 12, even though the leading edge of the second sheet is held by the separating member 14, , the portion in contact with the feeding row 212 is fed out, and the second sheet is folded. In this way, in the discharge mechanism shown in FIG. 2, the frictional force between the sheet 2 and the roller 12,
It is necessary to set and adjust the relative strength of the frictional force between the separate member 14 and the sheet, and the pressure contact force between the separate member 14 and o-2., 1.2, resulting in an extremely complicated structure. Become.

0 OBJECTS OF THE INVENTION An object of the present invention is to provide a single sheet lifting mechanism that has a simple structure and is capable of reliably displaying pictures one sheet at a time, in order to eliminate the above-mentioned conventional drawbacks. Structure of the invention in order to achieve the above objects, the sheet ejection mechanism of the invention is as follows:
While feeding the sheet in the ejection direction, the leading edge of the sheet is temporarily pressed to curve the uppermost sheet and separate it, and then the pressure on the leading edge of the sheet is released and the separated uppermost sheet is fed out and the first sheet is discharged. 1q was completed.

0 Embodiments of the Invention The present invention will be described below using embodiments. 0 FIG. 3 is a diagram showing an embodiment of the sheet ejection mechanism of the present invention, and FIG. 4 is a diagram illustrating the operation of the embodiment. In Fig. 3, 17 is a pressure spring, 18 is a loading table, 19 is a separation roller, 20 is a suppressing member, 21 is a discharge 0-2, 22, 22' is a sheet detection position, and 23, 23' is a conveyor. In this embodiment, a separation roller 19 that comes into contact with the uppermost sheet surface of the sheet 2, and a suppressor blade 20 that is interlocked with the rotation of the separation roller 19 are provided. In the trap of the embodiment, the pressing member 2oiJ: is pivotally mounted on the same 1iib as the #l output row shear 21, and is driven nine rotations by a driving force different from the discharge row/+21. A person skilled in the art can easily realize a method of driving the coaxial suppressing section 20 and discharge roller 21. For example, the discharge roller 21, like the feed roller 12 in Figure 2, is driven by a rotary motor via a pulley and a belt. On the other hand, the valve pressure member 20 is rotatably attached to the rotation shaft of the discharge roller 21, and can be driven p times by the cam mechanism fill.

Or it can also be driven by a plunger, etc. It is also possible to consider a method in which the entire pressing member 20 or a part thereof is made of a metal part, and the pressing member 20 is attracted upwardly in the drawing by an electromagnetic key.

The sensors 22 and 22' are, for example, optical sensors made of light emitting/light receiving elements, and are used to detect the front and rear ends of the topmost sheet being fed out. Like a thread, the discharge roller 21 and the conveyance roller 23,
23' is preferable. guide 24
When forming the sheet conveyance and path at the sheet feeding port,
It is provided to prevent the sheet from being rolled up by rollers 21, I23', etc.

Hereinafter, the operation of the embodiment will be explained based on FIG. 4.O pressing member 20 presses the leading end surface of the sheet 2 as shown in FIG. It is prevented. The sheet movement may be prevented by only the pressing force of the sheet surface \ of the suppressing member 20, but the pressing force of the pressing surface 2 of the pressing member 20
It is also possible to use the frictional force between 0' and the sheet. In this state 1. When it becomes necessary to discharge the sheet, only the separation roller 19 rotates in the direction of the arrow by the drive system (not shown in FIG. q5). The sheet 2 is brought into contact with the separation p-219 with a predetermined pressing force by the spring 17. That is, the frictional force generated between the separation row 919 and the sheet 2 is set to be larger than the frictional force acting between the sheets.

Therefore, only the uppermost sheet is sent in the output direction by the rotation of the separation roller 19. As mentioned above, the leading edge of the uppermost sheet is held between the pressing member 20 and the loading table 18. As a result, as shown in FIG. 4(a), the uppermost sheet 2' is bent and separated from the second and subsequent sheets'.
After being pulled toward υ, the discharge row 21 and the conveyance rollers 23 and 23' are each rotated K in the direction of the arrow (FIG. 3). “Also these rollers 26, 23゜23
1 pressing member 20 at the same time as the rotation of ', or after rotational driving.
is evacuated from the seat surface. That is, as shown by Vc in FIG. 4(b), the pressing member 20 is rotated in the direction of the arrow. Pressing member 2
When the pressure is released by 0, only the uppermost sheet 2' which has been curved and separated is fed out together with the rotation of the force 1F output row 221.

The uppermost sheet 2' is transferred in the ejection direction by the separation μm 19 and the rotational pressure of the ejection roller 21. Thereafter, the leading edge of the fed sheet 2' is detected by the sensors 22, 22'. Depending on the detection signals of these sensors 22, 22', or after the detection (i) is generated, the separator row 519
stop. That is, the separation row 219 is stopped before the rear end of the green sheet 2' passes through the contact position between the separation row 219 and the sheet 2.

Alternatively, separation--the fly 9 may be separated from the drive source and made rotatable. In this way, the sheet leading edge detection position of the sensor 22, 22' and the separation roller 19 are set to be equal to or 75λ shorter than the length of the ejection force 18'' of the cartridge 2.

After the leading edge of the sheet 2' is detected by the sensors 22 and 22',
The sheet is transported only by the rotation of the discharge roller 221 until the leading edge of the sheet reaches the transport rollers 23 and 23'.

Therefore, the position of the sensor 22, 22' and the transport row 223°2
The distance from 3' is preferably as small as possible.

After that, the sheet 2' is transferred to the conveyance roller 923.23' and the discharge roller 2.
21. After that Senna 22°22'
The force at the rear end of the ejected sheet 2' is detected.

Upon detection of the passage of the trailing edge of the sheet, the state shown in FIG. 3 is returned to, and the operation of ejecting one sheet is completed. Tsumashi,
The suppression unit 20 is rotated again to press the second sheet surface, and the discharge row, F21, and conveyance μm roller 23sj3' are stopped. 1. fc to be discharged after separating the sheet to be fed next. Compared to the conventional method of separating sheets using a door exit, the sheets can be separated one by one more reliably.

In addition, Fig. 5 is a diagram showing an embodiment of the sheet horn protrusion 4 of this book.
iJ -rol1 minute is the same as the name of the same name, and its explanation is named jiv.

As shown in Fig. 5, the present implementation f/it''T:hashi?)ffl mounting table 1g' is made into a convex circular arc shape. 1 [separation of the uppermost sheet by interlocking with the rowia 19, which facilitates the formation of the B+1 curvature Il opening.

0 Effects of the Invention As detailed above, according to the present invention, the uppermost sheet is separated from the sheet 403 at the time when it is stored in the bottom sheet. l[[;6
It is possible to easily and reliably carry out sheet separation, and furthermore, the structure for sheet separation is simple, and its applicability is wide, making it possible to provide a useful sheet ejection mechanism.

In addition, the present invention can be applied and modified in various ways other than lQt to the mechanism shown in the embodiment. That is, in the embodiment, °C is the feeding formula for bending the uppermost sheet by <1d. The force indicated by the pressing part; is not limited to this, for example, it may be one that is pressed against the sheet surface and moves in the 171'' exit direction and in 3Y rows on the sheet surface. Although the structure is coaxial with the roller, for example, the suppressing member may be movable in a rectangular direction with respect to the sheet surface.

[Brief explanation of drawings]

FIGS. 1 and 2 are diagrams showing a conventional sheet ejection mechanism. FIG. 3 is a schematic diagram of one embodiment of the present invention, FIG. 4 is a diagram based on the work of Embodiment 1fJb, and FIG. 5 is a diagram showing another embodiment of the present invention. 2 is a stacked stacked sheet, 19 is a separation roller, 20 is a pressing part side, 22,'
22' is a sensor, and 23.23' is a conveyance row 2. 1st concave 720 30th (b) v4 times vJ5I211

Claims (2)

[Claims] (1) Sheet J#I, which has a storage section that stores the stacked sheets, and separates and discharges the stacked sheets one by one
The ejecting mechanism includes a feeding member provided in contact with the sheet surface and transporting the sheet in the ejecting direction, and a feeding member provided on the ejecting direction side of the core feeding member. V IIIt
After the upper sheet of the accumulated sheet is bent by driving the sheet feeding section with the sheet movement blocked by the nuclear suppression section, the sheet movement by the suppression section is The sheet ejecting cup is configured to release the rfJIJ blocking and feed out the sheet with the R phrase bent. (2) The sheet accommodating section is such that the sheets are