JPH05186120A - Obverse and reverse inversion device for paper sheet - Google Patents

Abstract

PURPOSE:To correct skew by storing a timing lag of the oblique signal of a detected paper sheet, stopping the paper when it enters a switch-back inversion passage, and generating a lag in the operating timing of right and left inversion guide rollers according to the timing lag of the oblique signal. CONSTITUTION:The skew of a paper sheet 25 while being carried on a main carrying passage is detected by the first sensor 56 to memorize the lag of an output signal. The paper sheet, which has been judged as a reversed one is led from an inversion part carrying passage 67 to a switch-back inversion passage 31 with a gate fork 34 kept at a full-line position. At this time, when the second sensor 65 detects the paper sheet 25, a stopper means 45 comes into action at a prescribed timing, the paper sheet is inhibited from proceeding. Then the timing of an inversion guide roller 44 on the side where it has entered aslant, previously is made to lag by the same amount as timing lag caused by memorized skew to make it come into action to the switch-back inversion passage 31 in advance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet reversing device for reversing and delivering a sheet conveyed to a predetermined location.

[0002]

2. Description of the Related Art An example of a switchback type sheet reversing device is shown in Japanese Patent Laid-Open No. 221056/1990. The paper sheet front and back reversing device sorts cover sheets and back sheets, and in the case of cover sheets, sends them into the U-turn conveying path 101 shown in FIG. In the case of leaves, it is fed into the switchback inversion path 102 to be inverted and then the U
It was designed to be merged at the end on the turn conveyance path 101 side.

In the paper sheet front / back reversing device, the switchback reversing path 102 is especially used for skewed back paper sheets.
If the paper sheet is fed into the inside of the switchback reversal path 102, the paper sheet collides with the paper sheet next fed into the switchback inversion path 102 when the paper sheet is inverted and fed out in a skewed state, causing a jam failure. As a solution to the problem, when a sheet is fed into the switchback inversion path 102 in a skewed state, the sensor 103 detects it and switches back the sheet in the skewed state. The skew is corrected by transporting the sheet toward the innermost side in the inversion path 102 for a predetermined time and abutting the end portion thereof on the bottom block 104 (30 in the above publication).

[0004]

By the way, in the paper sheet front / back reversing device configured as described above, when the paper sheet is a new ticket, the skew state is corrected by the skew correcting means as described above. Although it was corrected and the jam trouble in the switchback reversing path 102 could be prevented, in the case of a circulation ticket whose paper sheets are considerably worn out, since the waist is very weak, it is applied to the bottom block 104. When this happens, the leading edge side is bent at the deepest part in the switchback inversion path 102, and this time the bending causes a jamming failure, or the bent paper sheet itself is conveyed. There was a risk that it could get caught in some of the parts and be damaged.

The present invention has been made in view of the above circumstances. Even if a weak backing sheet is fed into the switchback reversing path, the skew of the sheet is surely corrected. It is an object of the present invention to provide a paper sheet front / back reversing device that can be reversed and sent out into the next conveyance path in a normal state.

[0006]

In order to achieve the above-mentioned object, the present invention conveys a main conveyance path for conveying sheets and a sub-conveyance path having a reversing mechanism and branched from the main conveyance path. In the paper-sheet front / back reversing device for reversing the front and back of the paper sheet in the switchback reversal path in cooperation with the carry-out mechanism provided in the vicinity of the switchback reversal path, and carrying out from the main transport path, A first sensor that is provided along a direction orthogonal to the main transport path and that includes a pair of detection elements that detect the deviation of the end portions of the paper sheets in the main transport path, and the paper that enters the switchback inversion path. A second sensor composed of a pair of detection elements provided in a direction orthogonal to the traveling direction of the leaves, and based on a detector signal of the second sensor, blocking a sheet into the switchback inversion path at a predetermined position Stopper means and the switch bar (C) The first and second stoppers are provided apart from each other in a direction orthogonal to the traveling direction of the paper sheet entering the reversing path, and the stopper prevents the paper sheet from entering the stopper based on the detector signal of the second sensor. With the operation timing deviation of the same amount as the detection output timing deviation of the paper sheet end portion of the sensor, the paper sheet end portion side first entering the switchback reversing path is sequentially operated toward the switchback reversing path side. , A pair of reversing guide rollers that cooperate with the carry-out mechanism to correct the skew of the paper sheet and carry it out to the sub-transport path.

[0007]

According to the above construction, the first sensor detects the skew (skew) of the paper sheet being conveyed on the main conveyance path, and the storage section stores the timing deviation of the detector signal. afterwards,
The paper sheet being conveyed on the main conveyance path is carried into the switchback reversal path, the second sensor detects the entry of this paper sheet into the switchback reversal path, and after a predetermined timing of this detection,
The two stopper means operate in synchronism with each other toward the switchback inversion path to prevent the paper sheets introduced into the switchback inversion path from proceeding. Next, the two inversion guide rollers
The operation timing is shifted by the same amount as the output timing deviation of the first sensor, and the inversion guide roller on the end side of the paper sheet that obliquely enters is sequentially operated to the switchback inversion path side first, and the switch is turned on. The skew of the paper sheet pulled out from the inside of the back inversion path is corrected and the sheet is carried out.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side cross-sectional view of a part of a sheet front / back reversing device. In FIG. 1, reference numeral 1 denotes a main body. An exit 3 is provided. A pulley 4 is provided above the carry-in port 2 of the main body 1, and pulleys 5 and 6 are provided above and below the back side of the main body 1, respectively. These pulleys 4,
Three units 5 and 6 are provided in the respective rotation axis directions. A belt 7 is wound around each of the pulleys 4, 5 and 6. In addition, a pulley 8 is provided below the carry-out port 3 side of the main body 1.
Is provided, and pulleys 9 and 10 located below the pulley 6 are provided in the lower lower portion of the main body 1. Three of these pulleys 8, 9 and 10 are provided in the respective rotation axis directions, and a belt 11 is wound around each of the pulleys 8, 9 and 10.

On the inner side of the main body 1, pulleys 12 and 13 are arranged vertically above and below the carry-in entrance 2 and the carry-out exit 3 from the pulleys 5 and 6, respectively. The pulley 12 is provided below the pulley 5, and the pulley 13 is provided at a height position between the pulleys 6 and 9. Three of these pulleys 12 and 13 are provided in the rotation axis direction, and a belt 14 is wound around each of the pulleys 12 and 13. Also, pulley 1
A pulley 15 is provided apart from the pulley 12 on the side of the carry-in port 2 of the pulley 2, and the pulley 1 is provided below the pulley 4.
6 is provided. These pulleys 15 and 16 are provided in the number of three in each of their rotation axis directions.
A belt 17 is provided on each of 5 and 16. A pulley 18 is provided below the pulley 15 at a distance from the pulley 15 and a pulley 19 is provided obliquely below the pulley 18 on the outlet 3 side.
Two of these pulleys 18 and 19 are provided in the respective rotation axis directions, and a belt 20 is wound around each of the pulleys 18 and 19.

The belt 7 wound around the pulleys 4, 5 and 6 is wound on the outside of the belt 14 wound around the pulley 12 so as to have a side surface substantially L-shaped as a whole, and the belt 1
It is made to face 4,17. Also, the pulley 8,
The belt 11 wound around the pulleys 9 and 10 is wound on the outer side of the belt 14 wound around the pulleys 12 and 13, and the pulley 19 is wound around the belt 14.
Is opposed to. From the above, between the belts 7 and 17,
A main conveyance path 66 is formed between the belts 7 and 14 and between the belts 11 and 20 to convey the paper sheet 25.

A transport guide (not shown) is provided along the main transport path 66 on the main transport path 66, where the belt is not present. Also pulley 15,
A conveyance guide 21 is provided in the vicinity of the belt 7, and a conveyance guide 22 is provided in the vicinity of the pulley 18 and the belt 20. One end side (lower side) of the transport guide 21 is the pulley 15
Is bent along the outer periphery of the belt, and the other end side (upper side) is bent toward the pulley 12 side and runs along the belt 7. One end side (upper side) of the transport guide 22 is curved along the outer circumference of the pulley 18, and the other end side (lower side) part is along the belt 20. Further, on the upper side of the belt 11, the pulley 1
3 and the pulley 19 are provided with a transport guide 23, and the transport guide 24 extends from the pulley 19 to the carry-out port 3.
Is provided. The transport guides 23, 24 are flat plates and are provided at positions where no belt is present.

Further, an upper reversing part guide 28 and a lower reversing part guide 29 are provided in a slanted manner vertically between the pulleys 15 and 18 toward the front side of the main body 1 and obliquely downward. The upper reversing part guide 28 and the lower reversing part guide 29 are provided to face each other with a predetermined gap. One ends of the upper reversing part guide 28 and the lower reversing part guide 29 are located at a substantially central height position in the main body 1, and the other ends of the upper reversing part guide 28 and the lower reversing part guide 29 are close to the carry-out port 3. Is provided below, and the upper end guide 28 and the lower end guide 29 are closed by a bottom block (end body) 30 provided at the other end. This bottom block 30
Has a smooth reference surface 30a. The upper reversing part guide 28 and the lower reversing part guide 29 are provided at a position where the belt does not exist, and a switchback reversing path 31 is formed between the upper reversing part guide 28 and the lower reversing part guide 29.

A gate fork 34 having a substantially triangular side surface is fixed to a shaft 35 between the pulleys 12 and 15 so as to be swingable about the shaft 35. The shaft 35 is connected to a rotary drive source (not shown) and can be rotated in the forward and reverse directions. A plurality of gate forks 34 are provided in the direction of the shaft 35 so as to be positioned at positions where belts and conveyance guides do not exist. An idle roller 40 is provided between the pulleys 15 and 18. This idol roller 40
Is rotatably connected to the conveyance guide 22 via a supporting member and is provided in contact with both the belt 17 and the belt 20. A plurality of idle rollers 40 are provided in the rotation axis direction.

Notches 28a, 28a are formed on the pulleys 15, 18 side of the upper reversing section guide 28, and square holes 28b, 28 are formed on the bottom block 30 side of the upper reversing section guide 28.
b is formed. On the other hand, in the main body 1, a rotating block 42 is supported by a pair of shafts 41 coaxially with each other in the vicinity of the upper reversing portion guide 28. One end of a lever 43 is attached to the rotation blocks 42. A reversing guide roller 44 is rotatably attached to the other end of the lever 43 so as to come into contact with the belt 20 wound around the pulley 18 through the notches 28a and 28a. Therefore, two reversing guide rollers 44 are provided,
These two reversing guide rollers 44 are rotary solenoids (not shown) separately connected via two levers 43, two rotating blocks 42, and two shafts 41, respectively.
It is designed to be rotated independently.

A stopper means 45 is provided above the lower part of the switchback inversion path 31. The stopper means 45 is provided for the shaft 4 rotatably provided on the main body 1.
6 and an L-shaped pressing member 47 whose base end is fixed to the shaft 46
The brake member 48 made of rubber or the like is attached to the tip of the L-shaped pressing member 47, and a solenoid (not shown) connected to the shaft 46 and rotationally driving the shaft 46. A pair of stopper means 45 are provided in the length direction of the shaft 46 so as to rotate coaxially. Further, when the stopper means 45 is rotated toward the switchback inversion path 31 side, the brake member 48 has the square hole 28b.
Further, the switchback inversion path 31 can be inserted into the switchback inversion path 31 to close the switchback inversion path 31. The two stopper means 45 are arranged to be immediately separated from the paper sheet 25 when any one of the two reversing guide rollers 44 is actuated to the switchback reversing path 31 side.

Guide rollers 50, 51 for pressing the paper sheet 25 or for belt backup are rotatably attached to predetermined positions of the transport guides 22, 24 via supporting members. Further, a guide roller 52 for pressing the paper sheets 25 or for belt backup is rotatably attached to the main body 1 below the pulley 19 via a supporting member. Further, both sides of the main transport path 66, which will be described later, in the vicinity of the carry-in port 2 (the main transport path 6 when viewed from the carry-in port 2 side)
A first sensor 56 including a pair of sensor elements is attached to both the left and right sides of 6. Upper reversing section guide 28,
A second sensor 65 composed of a pair of sensor elements is switchback-reversed at predetermined locations (on the left and right sides of the switchback reversal path 31 when viewed from the carry-out port 3 side) on the bottom block 30 side of the lower reversal unit guide 29 that face each other. It is provided so that the paper sheet 25 in the path 31 can be detected.

The carry-in port 2 is formed between the belts 7 and 17 on the pulley 4, 16 side, and the carry-out port 3 is formed between the upper belt 11 on the pulley 8 side and the transport guide 24. .. Also, between belts 7 and 17, belts 7 and 14
A main transport path 66 is formed between the upper belt 11 and the transport guide 23, and between the upper belt 11 and the transport guide 24. A reversing section carry-in path 67 is formed between the belts 7 and 17, between the belt 17 and the gate fork 34, and between the conveyance guide 21 and the belt 17, and the belt 20 and the guide roller 50 are provided.
Between the conveyance guide 24 and the upper belt 11, a reversing section carry-out path 68 is formed. Then, the reversing section carry-in path 67
A sub-transport path 69 is constituted by the inverting section carry-out path 68. In addition, each pulley 4, 5, 6, 8, 9, 10, 1
2, 13, 15, 16, 18, 19, idle roller 40, reversing guide roller 44, guide rollers 50, 5
1, 52 rotate at constant speed in the directions of the arrows shown in FIG.

Next, the operation of the paper sheet front / back reversing device configured as described above will be described. In the following description, it is assumed that the main transport path 66 is bent and the surface of the actual paper sheet 25 is replaced, but the sheet is not inverted. The paper sheet 25 is provided by a pre-stage mechanism such as a count determination unit (not shown) provided on the right side of the carry-in port 2 in FIG.
The front side and the back side are discriminated, and the paper sheet 25 is carried into the carry-in port 2 by the front stage mechanism in a mixed state of the front and back sides. Then, the paper sheet 25 is conveyed through the main conveyance path 66, and the first sensor 56 detects a skew (skew) of the paper sheet 25 being conveyed (edge shift of the paper sheet 25). When the skew of the paper sheet 25 is detected, the timing shift (for example, Xmsec) of each output signal of the first sensor 56 is stored in the storage unit (not shown).

If the paper sheet 25 being conveyed is judged to be being conveyed, for example, based on the front and back data of the paper sheet 25 detected by the preceding mechanism, the gate fork is determined. 34 is located at the position shown by the alternate long and short dash line in the figure, and the paper sheet 25 passes through the main conveyance path 66, is carried out from the carry-out port 3 as is as the cover paper sheet 25, and is sent to a post-stage mechanism such as a stacking unit (not shown). .. Further, when the paper sheet 25 carried in from the carry-in port 2 is discriminated as the back paper sheet 25, for example, when the first sensor 56 detects the skew of the paper sheet 25, the gate fork 34 is indicated by a solid line in FIG. Located at the position shown, the paper sheet 25 is guided to the reversing unit carry-in path 67, passes through this, and is carried into the switchback reversing path 31 by the belt 17 and the idle roller 40.

Paper sheets 25 carried into the reversing section conveying path 31
Is detected by the second sensor 65, and the two stopper means 45 are synchronized after a predetermined timing from this detection, that is, after a timing sufficient for the end portion side which is diagonally leading to reach the bottom block 30. The brake member 48 presses the paper sheet 25 in the switchback reversing path 31 against the lower reversing section guide 29, thereby preventing the paper sheet 25 in the switchback reversing path 31 from further moving. Therefore, the tip of the paper sheet 25 in the switchback inversion path 31 on the side of the bottom block 30 is prevented from hitting the bottom block 30 and bending.

Next, the two reversing guide rollers 44 are
Deviation in the output timing of the first sensor 56 (Xmse
The operation timing is shifted by the same amount as in (c), and the end-side reversing guide roller 44 that obliquely enters is operated toward the switchback reversing path 31 side first. For example,
In the case of the state of the paper sheet 25 shown in FIG. 2, since the end portion of the paper sheet 25 on the right side of FIG. 2 has entered into the switchback inversion path 31 earlier, The reversing guide roller 44 is actuated to the switchback reversing path 31 side first, and then the reversing guide roller 44 on the left side of FIG. 2 is shifted by the same amount as the deviation (Xmsec) of the output timing of the first sensor 56. Are operated to the switchback reversing path 31 side. In operation, these reversing guide rollers 44 move to the position shown by the alternate long and short dash line in FIG. 1, and press the paper sheet 25 to the belt 20 side.
The paper sheet 25 pressed onto the belt 20 is
It is pulled out from the inside of the switchback inversion path 31 by the conveyance force Therefore, the paper sheet 25 carried into the switchback inversion path 31 corrects its skewed state by the cooperation of the two inversion guide rollers 44 and the belt 20 when pulled out from the switchback inversion path 31. As a result, the paper sheet 25 is prevented from being taken out in a vertically inclined state (inclined state shown by a two-dot chain line in FIG. 2) when viewed from the right side of FIG.

The reversing guide roller 44 pushes the trailing end of the paper sheet 25 into the switchback reversing path 31 against the belt 20 to pull out the paper sheet 25 from the switchback reversing path 31. Road 31
The trailing end of the paper sheet 25 that has been fed into the paper is deflected in the direction between the idle roller 40 and the pulley 18. Then, in a state where the paper sheet 25 is sandwiched between the belt 18 and the reversing guide roller 44, the paper sheet 25 is switched back by the rotational force of the belt 18 to the switchback reverse end 31. The idle roller 4 is used as the front end of the carry-out from the inversion path 31.
It is inserted between 0 and the belt 18, and the transport guide 2 continues.
2, guided between the belt 20 and inserted between the belt 18 and the guide roller 52, and further, the transport guide 24 and the belt 1
By being fed between the sheets 1, the cover sheets 25 are merged into the main conveyance path 66 via the sub-conveyance path 69. Therefore, the back sheet 25 is turned over as the cover sheet 25, and the front side and the back side are collected together with the cover sheet 25 conveyed through the main conveyance path 66 and are carried out from the carry-out port 3.

As described above, according to this embodiment, the skew (skew) of the paper sheet 25 being conveyed on the main conveying path 66 is first
The storage unit stores the deviation of the timing of the detector signal detected by the sensor 56, and then the paper sheet 25 being conveyed through the main conveyance path 66 is carried into the switchback inversion path 31, and the paper sheet 25 is conveyed. Second to enter the switchback reversal path 31
Detected by the sensor 65, and after a predetermined timing of this detection, the two stopper means 45 synchronously operate toward the switchback inversion path 31 side to prevent the sheet 25 introduced into the switchback inversion path 31 from proceeding. Therefore, not only the strong paper sheet 25, but also the weak paper sheet 25 is bent at the switchback reversal path 31 and a jam failure is caused by the bending. It is possible to prevent the paper sheets 25 that are invited or bent from being caught on a part of the transport path and damaged. Further, the two reversing guide rollers 44 shift the output timing of the first sensor 56 (Xmsec).
The sheet is pulled out from inside the switchback reversing path 31 because the reversing guide roller 44 on the side of the end portion which obliquely precedes and enters the switchback reversing path 31 is operated first by shifting the operation timing by the same amount. The skew of the leaves 25 can be reliably corrected.

The shapes of the reversing guide roller 44 and the stopper means 45 are not limited to the shapes of the above-described embodiment. For example, the reversing guide roller is not a roller shape but a simple rod-shaped member. Good.

[0025]

According to the present invention, when the skewed back sheet is fed into the switchback reversing path, the sheet is switched with the posture of the sheet once fed. By stopping the stopper means in the back reversing path and then shifting the operation timings of the pair of reversing guide rollers according to the degree of inclination,
While correcting the skew of the paper sheets, it was sent out to the conveyance path side of the latter stage, so in the switchback reversal path,
Even if a weak paper sheet is fed in, it can be skew-corrected and then inverted so that it can be sent out to the next conveyance path in a normal state. It is possible to prevent the jamming from being caused due to the bending, or to prevent the bent paper sheet itself from being caught by a part of the conveying path and being damaged.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a view taken along the line AA of FIG.

FIG. 3 is a side sectional view of a main part of a conventional paper sheet front / back reversing device.

[Explanation of symbols]

 25 Paper Sheets 31 Switchback Inversion Path 44 Inversion Guide Roller 45 Stopper Means 56 First Sensor 65 Second Sensor 66 Main Conveyance Path 69 Sub-Conveyance Path

Claims (1)

[Claims] 1. A main conveyance path for conveying paper sheets, and a paper sheet conveyed to a sub-conveyance path having a reversing mechanism branched from the main conveyance path to a switchback reversal path at a switchback reversal path. A paper sheet front and back reversing device that reverses the front and back in cooperation with a delivery mechanism provided in the vicinity and is carried out from the main transport path, wherein the main transport path is provided along a direction orthogonal to the main transport path. A first sensor including a pair of detection elements for detecting the deviation of the ends of the paper sheets inside, and a pair of detections provided in a direction orthogonal to the traveling direction of the paper sheets entering the switchback inversion path A second sensor composed of an element, a stopper means for blocking a sheet into the switchback reversing path at a predetermined position based on a detector signal of the second sensor, and a sheet entering the switchback reversing path Direction orthogonal to the traveling direction of the class An operation timing of the same amount as the detection output timing deviation of the sheet end portion of the first sensor in lieu of the release of the sheet entry prevention of the stopper based on the detector signal of the second sensor With a deviation, the sheets of paper that have first entered the switchback reversing path are sequentially operated toward the switchback reversing path, and the skew of the sheets is corrected in cooperation with the carry-out mechanism. A sheet reversing device, comprising a pair of reversing guide rollers that are then conveyed to the sub-conveyance path.