JPH07285687A - Feeding device for paper sheet or the like - Google Patents

Abstract

PURPOSE:To prevent feeding mistake or double feeding from occuring by judging the thickness of the second paper sheet by the fact that the second paper sheet is protruding from a guide member or not, and controlling the feeding pressing force to the second paper sheet. CONSTITUTION:When the first mail 13 is fed out by rotating a feed roller l and feeding-in rollers 2, 3, the second mail 14 is fed out following the mail 13. In the case where the tip position of the second mail 14 is upstream from a tip detection sensor 10a, it is judged that the second mail 14 is thick and heavy, and a servo motor 15 is rotated so that tension of springs 6, 7 is increased. The pressing force of feeding-in rollers 2, 3 is increased to increase the movement of the mail 14. When the tip position of the mail 14 is detected by tip detection sensors 10a to 10h, it is judged that the mail is thin and light in weight, and the servo motor 15 is rotated so that the springs 6, 7 are loosened according to the positions of the sensors 10a to 10h, and thereby the movement of the mail 14 is limited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a difference in friction between paper sheets such as postal matter in which thin and thick materials are mixed and between the paper sheets and between the paper sheets and the feeding roller due to the pressing force of the feeding roller. The present invention relates to a paper sheet feeding device that takes out one sheet at a time by utilizing.

[0002]

2. Description of the Related Art Generally, in a feeding device for feeding paper sheets by utilizing the difference in friction as described above, a pressing force of a feeding roller is thin and light in order to prevent a plurality of paper sheets from being fed. It is weakly set according to the paper sheets. However, when a thick or heavy paper sheet is supplied when the pressing force is always weak, slippage may occur between the feeding roller and the paper sheet, which may reduce the processing speed or make the supply impossible.

To prevent this, Japanese Patent Publication No. 1-1816
In Japanese Patent No. 53, a paper sensor for detecting the presence or absence of paper sheets is provided after the separation roller, and when the paper sheets do not reach the paper sensor within a set time from the start of rotation of the feed roller and the feed roller, the paper is fed by a solenoid or the like. The pressing force of the roller is increased to increase the output power to the paper sheets and to supply thick or heavy paper sheets.

[0004]

However, in the above-described conventional feeding device, it is detected that the paper sheet has not reached the paper sensor within the set time from the start of the rotation of the feed roller and the feed roller. As the thicker or heavier paper is fed by increasing the pressing force of the feed roller against the paper, slippage may occur between the feed roller and the paper, which may damage the paper. . Further, even if the paper can be supplied, the distance between the supplied paper sheets is widened and the processing speed is reduced.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a paper sheet feeding device in which the paper sheets are smoothly and quickly fed. To do.

[0006]

In order to achieve this object, a paper sheet feeder according to the present invention comprises a feed roller for feeding paper sheets, a feed roller for taking out paper sheets, and a paper sheet. A sheet feeding device comprising a separating roller for preventing two or more sheets from being taken out, and pressing force adjusting means for adjusting the pressing force of the feeding roller against the sheet.
A guide member that guides the leading edge of the paper sheet so that the leading edge of the paper sheet is always supplied from a fixed position, and a leading edge of the second paper sheet that is disposed immediately after this guide member and separated. And a tip detecting sensor for operating the pressing force adjusting means. Further, the paper sheet feeder according to the present invention is provided with a plurality of leading edge detection sensors in the paper sheet feeding direction, and determines the leading edge position of the second paper sheet separated by the plurality of leading edge detection sensors. The pressing force of the pressing force adjusting means can be detected and the pressing force of the pressing force adjusting means can be adjusted. Further, the paper sheet feeder according to the present invention includes a feed roller for feeding paper sheets, a feed roller for taking out paper sheets, a separation roller for preventing two or more paper sheets from being taken out, and a paper sheet. In a paper sheet feeding device including a pickup roller for pulling out a paper sheet, a servo motor for adjusting the pressing force of the feeding roller to the paper sheet through a spring means, and the tip of the paper sheet from a constant position at all times. A guide member that guides the leading edge of the paper sheet so as to be supplied, and a plurality of guide members are provided immediately after the guide member in the paper sheet supply direction,
A front end detection sensor that detects the front end position of the separated second paper sheet and that can adjust the pressing force by the servo motor based on this front end position is provided. It is provided up to the installation position.

[0007]

According to the present invention, when the separated second paper sheet is thin, it is dragged by the first paper sheet and protrudes from the guide member. The pressing force of the pressure adjusting means is adjusted weakly. Further, according to the present invention, the protruding amount of the separated second paper sheet is detected,
The degree of the thickness of the paper sheet is detected based on the amount of protrusion, and the pressing force of the pressing force adjusting means is adjusted according to the thickness. Further, according to the present invention, the rotation amount of the servo motor is set according to the thickness of the paper sheet detected by the leading edge detection sensor to adjust the pressing force, and the pickup roller is provided at the arrangement position. The leading edge detection sensor detects the first sheet and stops the feeding of the feed roller and the feed roller.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a paper sheet feeder according to the present invention, and FIG. 2 is a side view of a main part showing a feeding operation. (A) shows a case where a paper sheet is thin and (b) shows a thick case. Is shown. In these figures, reference numeral 1 denotes a feed roller that can be instantly started and stopped, and 2 and 3 are feed rollers that are swingably supported around the feed roller 1. These feed rollers 1 and Laura 2,
3 has a built-in one-way clutch, and when the drive to the feed roller 1 and the feed rollers 2 and 3 is stopped, it can rotate in the counterclockwise direction.

Reference numeral 4 is a backup plate for moving the postal matter P loaded in the supply base 8 to the feed rollers 2 and 3 as the feeding progresses. Reference numeral 5 is for the tip end of the postal matter P to be always fed from a fixed position. So as to guide the leading edge of the postal matter P, 9 is a separation roller which faces the feed roller 1 and is given a constant rotational load by a torque limiter (not shown), and 11 and 12 are the feed rollers 1.
Is a pickup roller which is disposed on the downstream side of the conveyance and which is constantly rotating. Reference numeral 15 is a servo motor which instantaneously adjusts the pressing force of the feed rollers 2 and 3 to the mail P through the springs 6 and 7 and the operating rods 6a and 7a. is there. Reference numerals 10a to 10h denote leading edge detection sensors provided at equal intervals up and down on the downstream side of the conveyance immediately after the guide plate 5 to the positions where the pickup rollers 11 and 12 are arranged. A signal for setting the amount of rotation of the servomotor 15 is sent to the servomotor 15 by detecting the amount of protrusion.

Next, the supply operation of the paper sheet supply apparatus thus configured will be described. First, the feed roller 1 and the feed rollers 2 and 3 are rotated to take out the first postal matter 13, and the second postal matter 14 to be picked up and fed is fed to the guide plate 5 or the separation roller 9.
To separate. When the separated first mail piece 13 is captured by the pickup rollers 11 and 12, the mail piece 13
Is detected by the tip detection sensor 10h, the drive source of the feed roller 1 is stopped, and the pickup rollers 11, 1
2 is pulled further to the downstream side of the conveyance and pulled out. At this time,
Since the feed roller 1 and the feed rollers 2 and 3 which have been stopped from being driven by the drive source rotate counterclockwise by a one-way clutch, the pickup rollers 11 and 1
When 2 pulls out postal matter 13, it does not interfere with pulling out by turning around.

In this way, the pickup rollers 11 and 12
When a gap is generated between the rear end of the first mail piece 13 pulled out by and the tip of the second mail piece 14 to be supplied next,
This is detected by one of the leading edge detection sensors 10a to 10h, the feed roller 1 and the feed rollers 2, 3 start driving, and the supply of the second postal matter 14 is started.

By the way, when the ordinary mail P is thin and light like a postcard, the second mail 14 is dragged by the first mail 13 as shown in FIG. Immediately after the postal matter is separated from the front end position of the postal matter 14 is located downstream of the front end detection sensor 10a, the amount of protrusion from the guide plate 5 at the front end position varies depending on the thickness of the postal matter 14. That is, the thinner the postal matter 14, the greater the amount of protrusion. On the other hand, when the postal matter 14 is thick or heavy, it is not dragged by the postal matter 13 as shown in (b) of the figure, and its leading end position is located downstream of the leading end detection sensor 10a in conveyance.

The present invention utilizes this property, and the tip position of the second mail piece 14 is detected by the tip detection sensor 1.
If the postal matter is upstream from 0a, it is judged that the postal matter 14 is thick or heavy, and the servo motor 15 is rotated in the direction in which the tension of the springs 6 and 7 increases, that is, in the clockwise direction in the figure, and the pressing force of the feed rollers 2 and 3 is increased. Increased mail 1
The frictional force between the feed roller 4 and the feed rollers 2 and 3 is increased to prevent slippage.

On the contrary, when the center position of the postal matter 14 is located on the downstream side of the conveyance from the front end detection sensor 10a, the postal matter 14 is judged to be a thin and light postal matter, and the servo motor 1 is used.
5 is rotated in a direction in which the springs 6 and 7 are loosened, that is, counterclockwise in the figure. At this time, the rotation amount of the servo motor 15 is set according to the thickness of the mail piece 14 by detecting the amount of protrusion of the mail piece 14 from the guide plate 5 by any of the plurality of tip detection sensors 10a to 10h. Therefore, the pressing force of the feed rollers 2 and 3 according to the thickness of the postal matter 14 can be obtained. In this way, by reducing the frictional force between the postal matter 14 and the feed rollers 2 and 3, it is possible to prevent the plural sheets from being fed and to stably supply the postal matter.

In this embodiment, the feeding roller 2,
Although the pressing force of No. 3 is adjusted by the servo motor 15 and the springs 6, 7, etc., it is needless to say that various design changes are possible without being limited to this. Is.

[0016]

As described above, according to the present invention, a feed roller for feeding paper sheets, a feed roller for taking out paper sheets, and a separating roller for preventing two or more paper sheets from being taken out. In the paper sheet feeder, the pressing force adjusting means for adjusting the pressing force of the feeding roller to the paper sheet, and the tip of the paper sheet so that the tip of the paper sheet is always fed from a constant position. A guide member for guiding the sheet and a tip detection sensor that is provided immediately after this guide member and detects the tip of the second separated sheet to operate the pressing force adjusting means. Since the thickness of the second sheet is judged depending on whether or not the second sheet is protruding from the sheet, the pressing force for feeding the second sheet is adjusted. It is possible to prevent mistakes and double feed, and Since it is determined later, 1 per day, and 2
It is possible to feed continuously without increasing the feeding interval between the continuous stitches and to increase the feeding speed.

Further, according to the present invention, a plurality of leading edge detection sensors are provided in the sheet feeding direction, and the leading edge position of the second paper sheet separated by the plurality of leading edge detection sensors is detected, The pressing force of the pressing force adjusting means can be adjusted by this tip position, and the pressing force can be adjusted according to the thickness of the second paper sheet, so that it can be applied to paper sheets of various thicknesses. The versatility is increased.

Further, according to the present invention, a feeding roller for feeding the paper sheets, a feed roller for taking out the paper sheets, a separation roller for preventing two or more paper sheets from being taken out, and a paper sheet for pulling out the paper sheets. In a paper sheet feeding device including a pickup roller, a servo motor that adjusts the pressing force of the feeding roller on the paper sheet via spring means, and the leading edge of the paper sheet are always fed from a fixed position. As described above, a guide member for guiding the leading edge of the paper sheet, and a plurality of guide members immediately after this guide member in the paper sheet feeding direction are detected. A tip detection sensor capable of adjusting the pressing force of the servo motor according to the tip position is provided, and the tip detection sensor is provided up to the position where the pickup roller is arranged to support the adjustment of the pressing force of the paper sheets. Since to perform at Bomota, adjustment can be performed instantaneously and accurately. Further, the leading edge detection sensor provided at the position where the pickup roller is arranged also detects the leading edge of the first sheet and stops the feeding roller and the feed roller from feeding. Since it is eliminated, the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic side view of a paper sheet feeder according to the present invention.

FIG. 2 is a side view of a main part showing a supply operation in the paper sheet supply apparatus according to the present invention, in which (a) shows a thin paper sheet and (b) shows a thick paper sheet.

[Explanation of symbols]

1 ... Feed roller, 2, 3 ... Feeding roller, 5 ... Guide plate, 6, 7 ... Spring, 9 ... Separation roller,
10a to 10h ... Tip detection sensor, 11, 12 ... Pickup roller, 13 ... First mail, 14 ... Second mail, 15 ... Servo motor, P ... Mail.

Claims (3)

[Claims] 1. A paper sheet feeding device comprising a feed roller for feeding paper sheets, a feed roller for taking out paper sheets, and a separation roller for preventing two or more paper sheets from being taken out. A pressing force adjusting means for adjusting the pressing force of the roller on the paper sheet, a guide member for guiding the front end of the paper sheet so that the front end of the paper sheet is always supplied from a fixed position, and a guide member of this guide member. A paper sheet feeding device, which is provided immediately after that, and which is provided with a leading edge detection sensor that detects the leading edge of the separated second paper sheet and operates the pressing force adjusting means. 2. The paper sheet feeding device according to claim 1, wherein a plurality of the leading edge detection sensors are provided in the paper sheet feeding direction, and the plurality of leading edge detection sensors are separated by two.
A sheet feeding device, characterized in that a tip position of a common paper sheet is detected and the pressing force of the pressing force adjusting means can be adjusted by the tip position. 3. A paper comprising a feeding roller for feeding paper sheets, a feed roller for taking out paper sheets, a separation roller for preventing two or more paper sheets from being taken out, and a pickup roller for pulling out paper sheets. In a sheet feeding device, a servo motor that adjusts the pressing force of the feeding roller to the sheet via spring means, and a sheet feeding device that feeds the leading edge of the sheet from a constant position at all times. A guide member for guiding the leading end, and a plurality of guide members provided in the sheet feeding direction immediately after the guide member to detect the leading end position of the second separated sheet, and the servo motor is detected by this leading end position. And a leading edge detecting sensor capable of adjusting the pressing force by the leading edge detecting sensor, and the leading edge detecting sensor is provided up to the arrangement position of the pickup roller.