JP2549788Y2 - Feeding device for sheet counting machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet counting machine, and more particularly, to a paper sheet suitable for reducing the size of a feeding mechanism such as a feeding roller and enabling high-precision intermittent feeding control of sheets. The present invention relates to a feeding device in a leaf counter.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Publication No. 57-12787, there is a paper sheet counting machine in which paper sheets are intermittently fed one by one by a feeding device and counted. As a feeding device of this type of paper sheet counting machine, a feeding device in which the peripheral surface of a feeding roller is formed of a high friction material and a low friction material, or a feeding device in which the entire peripheral surface of the feeding roller is formed of a high friction material and feeding is performed. There is a feeding device in which the peripheral speed of a transport roller downstream of the roller is set to a peripheral speed higher than the peripheral speed of the feeding roller.

[0003]

However, the above-mentioned prior art has the following problems. In the former feeding device in which the peripheral surface of the feeding roller is formed of a high friction material and a low friction material, in order to perform a smooth feeding operation of the sheets to be counted, the length of the outer circumference of the feeding roller is required. However, since it is necessary to set the length of the sheet in the transport direction plus a predetermined interval (interval between each sheet), there is a restriction that the diameter of the feeding roller cannot be smaller than the predetermined dimension. Was. For this reason, the feeding roller needs to have a certain shape, so that the feeding device is inevitably increased in size, and furthermore, the paper sheet counter equipped with the feeding device is also increased in size. , There was a problem of taking up installation space. In the latter feeding device in which the entire peripheral surface of the feeding roller is made of a high friction material and the peripheral speed of the conveying roller is higher than the peripheral speed of the feeding roller, the leading end of the paper fed by the feeding roller is one pair. When the paper sheet is nipped, the rear end of the paper sheet is nipped by the feeding roller and the separating member, and there is a speed difference between the feeding roller and the feeding roller. As a result, there is a problem that the paper slips with respect to the transport roller, and it is not possible to detect an accurate length of the paper. Therefore, it is conceivable to take measures to reduce the slip between the paper sheet and the transport roller.However, in this case, it is necessary to increase the drag of the transport roller. There was a problem of needing.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a feeding device for a paper sheet counting machine which can reduce the size of a feeding mechanism such as a feeding roller and control the intermittent feeding of paper sheets with high accuracy. With the goal.

[0005]

According to the present invention, there is provided a paper sheet counting machine configured to intermittently feed and convey paper sheets in a stacked state one by one from the lower side and count the sheets. A feeding roller formed of a high-friction material and feeding sheets one by one in cooperation with a sandwiching member, a feeding motor for rotating the feeding roller, and a peripheral surface formed of a high-friction material; A transport roller that transports the paper fed by the feed roller in cooperation with an auxiliary roller, a transport motor that rotationally drives the transport roller, and a paper that detects the paper passing through the transport roller Detecting means, rotation amount detecting means for detecting the rotation amount of the transport roller, and from the time when it is detected that the paper fed from the feed roller reaches the transport roller by the paper sheet detecting means, The transport row is detected by the rotation amount detecting means. Starts detection of the amount of rotation, braked said the feeding motor when the amount of rotation that the detection has reached the set value, the detection of the paper sheet by the paper sheet detection means
After the end, the braking of the feeding motor is released and the feeding is performed.
Control means for driving the roller . Further, the control means of the present invention, when performing the feeding and feeding of the second and subsequent sheets, detects the timing of applying a brake to the feeding motor one sheet before the sheet is detected by the sheet detecting means. The setting value of the rotation amount detecting means is changed based on the length of the paper sheet up to this point.

[0006]

According to the present invention, when the sheet detecting means detects the sheet reaching the transport roller, the rotation amount detecting means starts detecting the rotation amount of the transport roller, and the detected amount reaches the set value. At this time, tension is applied to the paper sheet based on the speed difference between the feeding roller and the transport roller to apply a brake to the feeding motor, but the time for the rear end of the paper sheet to contact the feeding roller is short. As a result, the center of the paper sheet is pinched by the conveyance roller, so that the occurrence of slippage between the paper sheet and the conveyance roller can be prevented, so that the accurate length of the paper sheet can be detected, and each paper sheet can be detected. Appropriate spacing between classes can be created. For the second and subsequent sheets, the feeding roller and the transport roller are used to change the set value when braking the feeding motor based on the detection length of the sheet up to the previous sheet. The time of the tension acting on the sheet due to the speed difference is always constant irrespective of the length of the sheet, so that the exact length of the sheet can be detected and the time between the sheets Can be generated at a high interval.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a feeder of a sheet counting machine according to the present embodiment. A feeder roller 2 having a circumferential surface formed of a high friction material is pressed into an inner peripheral portion of the feeder roller 2 on a shaft 1. It is attached via a one-way bearing 3. The feeding roller 2 is configured to intermittently feed the sheets S stacked in a stacked state on the front side of the feeding roller 2 one by one from the lower side to a transport roller described later. The shaft 1 is rotated in the direction indicated by an arrow by a motor A for feeding (see FIG. 5), and accordingly, the feed roller 2 is rotatable in the direction indicated by an arrow. A brake plate 4 made of a high-friction material is provided on the upper side of the feed roller 2, and the brake plate 4 and the feed roller 2 constitute a sheet separating section. On the other hand, a transport roller 6 whose entire circumferential surface is formed of a high friction material is fixed to the shaft 5 disposed at a position separated from the shaft 1. The shaft 5 is rotated in a direction indicated by an arrow by a motor B for transfer (see FIG. 5), so that the transfer roller 6 is rotated in a direction indicated by an arrow. Further, the shaft 5 is provided with an encoder (a rotation amount detection sensor, see FIG. 5).
The rotation amount of the transport roller 6 is detected by the encoder.

On the upper side of the transport roller 6, an auxiliary roller 7 made of a highly elastic member such as a sponge is disposed in pressure contact with the transport roller 6.
The auxiliary roller 7 rotates with the rotation of the transport roller 6. The transport roller 6 and the auxiliary roller 7
In cooperation with the above, the paper sheet fed by the feed roller 2 is conveyed to a counter (not shown, rightward in the figure). Further, an optical sensor 8 composed of a light emitting element and a light receiving element is disposed near the upper side and the lower side of the pressure contact P of the transport rollers 6 and 7, and a paper sheet passing through the pressure contact P is disposed. Types are detected. The sheets S stacked in a stacked state on the front side of the feed roller 2 are intermittently fed and conveyed one by one, as shown in FIG. 1, FIG. 2, FIG. FIG. 4 shows the elapse of time during the feeding conveyance.

The control system of the feeding device of this embodiment is shown in FIG.
The control unit 9 that controls each part of the feeding device includes a sheet detection signal that passes through the pressure contact point P detected by the optical sensor 8 and a conveyance detected by the encoder (rotation amount detection sensor) 10. The rotation amount signal of the roller 6 is taken in. Further, the control unit 9 controls the motor A
, The feed roller 2 is rotated in the direction indicated by the arrow, and the drive signal is output to the motor B, whereby the transport roller 6 is rotated in the direction indicated by the arrow. 6A shows the output waveform of the optical sensor 8 when the sheet A is detected and when it is not detected, the motor A and the motor B.
FIG. 6B is a timing chart showing drive / stop timings of the optical sensor 8 and output waveforms of the encoder 10. FIG. 5 is a timing chart showing drive / stop timings and output waveforms of an encoder 10.

In the feeding device of this embodiment, the control unit 9
When the driving of the motor A is stopped, the length of the sheet remaining behind the feeding position is set to be a certain length regardless of the length (length) of the sheet in the transport direction. In addition to the control, the transport roller 6 and the auxiliary roller 7 are controlled so that the paper sheet is conveyed while sandwiching not the leading end of the paper sheet but the center of the paper sheet (see FIG. 7). The control unit 9
When creating an interval between the second and subsequent sheets,
The timing at which the motor A activates the brake is controlled by changing the set value of the encoder 10 that detects the rotation amount of the transport roller 6 based on the detection length of the sheet up to one sheet before. I have. That is, the time distance I based on the length (L ′) of the paper sheet initially assumed (first sheet)
And the actual length L of the paper sheet based on the output of the optical sensor 8
From this, the time distance M for driving the motor A extra is M = L−
L ′ is calculated, and the calculated time distance M is added to the time distance I.
Is added, a new set value J = I + M of the encoder 10 is set (see FIG. 8).

Next, the operation of the feeding device of the present embodiment configured as described above will be described with reference to FIGS. 1 to 4 and FIG. The processing in FIG. 9 is based on the assumption that the length of the sheet in the transport direction is L ′. The control unit 9 drives the motor A to rotate the feeding roller 2 in the direction of the arrow, and drives the motor B. To rotate the transport roller 6 in the direction of the arrow (step S1, the state of FIG. 1). As a result, of the sheets S stacked in a stacked state on the front side of the feeding roller 2, one sheet S of the lowermost layer is separated into a sheet separating unit constituted by the feeding roller 2 and the brake plate 4. And then fed to the pressure contact P between the transport roller 6 and the roller. Along with this,
The optical sensor 8 detects the leading end Sa of the sheet S that has reached the pressure contact point P.
Is detected (step S2, state of FIG. 2), the controller 9
Indicates the rotation amount of the conveying roller 6 detected by the encoder 10 from the time point at which the sheet is detected by the optical sensor 8 and the time point at which the set value (time distance I based on the length of the sheet) shown in FIG. (Step S3) The brake is operated on the motor A (step S4, the state of FIG. 3). When the rotation speed of the shaft 1 decreases due to the brake operation on the motor A,
A speed difference occurs between the rotation speed of the shaft 1 and the rotation speed of the shaft 5. For this reason, the trailing end Sb of the sheet S is
When the paper leaves the paper separating section composed of the brake plate 4 and the paper sheet, the feeding speed of the paper by the feeding roller 2 depends on the rotation speed of the shaft 1, so that the leading end S'a of the next paper S ' A space K is generated between the sheet S and the rear end Sb of the preceding sheet S (the state of FIG. 4).

Thereafter, when the rear end Sb of the paper sheet S passes through the pressure contact point P between the transport roller 6 and the roller, the optical sensor 8 is turned off (step S5).
Detects the actual length L of the paper sheet and initially (1
The “time distance I” based on the assumed length L ′ of the sheet as assumed in the (sheet) and the “assumed length L ′ of the sheet” based on the output of the optical sensor 8 A new set value J of the encoder 10 is calculated by adding a value subtracted from the "actual length L" (step S6). When t ≧ 0 in the timing chart of FIG. 6B (step S7), the control unit 9 drives the motor A and feeds the next sheet by the feed roller 2 (step S7).
8). Thereafter, the process returns to the step S2, and the process formed by the loop of the steps S2 to S8 is repeated. In this case, for the second and subsequent sheets, the setting value I shown in FIG. 6 is changed to J depending on the length of the sheet in the conveying direction, so that the length of the sheet in the conveying direction is changed. Regardless, paper sheets can be fed intermittently at regular intervals.

[0013]

According to the present invention, as described above, according to the present invention, there is provided a paper sheet counting machine configured to intermittently feed and transport and count stacked paper sheets one by one from below. A feeding roller whose peripheral surface is formed of a high-friction material and which feeds sheets one by one in cooperation with a holding member, a feeding motor for rotating the feeding roller, and a peripheral surface formed of a high-friction material A transport roller that transports the paper fed by the feed roller in cooperation with an auxiliary roller, a transport motor that rotationally drives the transport roller, and detects the paper passing through the transport roller. Sheet detecting means, rotation amount detecting means for detecting a rotation amount of the transport roller, and detecting that the sheet fed from the feeding roller reaches the transport roller by the sheet detecting means. From the point in time, the rotation amount detection means Start the detected rotational amount of the conveying roller, braked motor for the feeding when the amount of rotation that the detection has reached the set value, the by the paper sheet detection means
After the detection of paper sheets is completed, release the braking of the feeding motor.
Control means for driving the feed roller, and the control means sets a timing for braking the feed motor when feeding and feeding the second and subsequent sheets. Is configured such that the set value of the rotation amount detecting means is changed based on the length of the previous sheet detected by the sheet detecting means, so that the following effects can be obtained. Since it is not necessary to set the outer peripheral length of the feeding roller constituting the feeding device to a length obtained by adding a predetermined interval (an interval between each sheet) to the length of the paper sheet as in the related art, the feeding roller is used. Can be reduced in diameter, and a transport motor having a small driving torque can be used by suppressing the pressing force of the transport roller, so that the feeder can be downsized. Moreover, the feeding roller has a small diameter as described above.
Even if the feeding roller is driven by the control means,
Motor is controlled to feed out paper sheets at intervals
This allows the feed roller and the transport roller to
Therefore, paper sheets are not pulled,
Between the transport roller and the paper sheet by pulling the paper, paper sheets
Inconveniences such as breakage of the device can be eliminated. Further, during the feeding and transport of the paper sheet, the middle of the paper sheet is pinched by the transport roller, and the time at which the rear end of the paper sheet contacts the feeding roller is short. It is possible to prevent the occurrence of slippage between the sheet and the conveying roller, thereby detecting the exact length of the sheet and generating an appropriate interval between the sheets. Also, for the second and subsequent sheets, the speed of the feeding roller and the transport roller is changed in order to change the set value when braking the feeding motor based on the detection length of the sheet up to the previous sheet. The time of the tension acting on the sheet due to the difference is always constant irrespective of the length of the sheet to be counted, so that the exact length of the sheet can be detected and each sheet can be detected. Appropriate spacing can be created between them.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a feeding device of a paper sheet counter according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an intermittent feeding operation of a sheet according to the embodiment.

FIG. 3 is an explanatory diagram of an intermittent feeding operation of a sheet according to the embodiment.

FIG. 4 is an explanatory diagram of an intermittent feeding operation of the paper sheet of the embodiment.

FIG. 5 is a control block diagram of the present embodiment.

FIG. 6 is a timing chart when a sheet A and a sheet B according to the present embodiment are detected and not detected.

FIG. 7 is a schematic diagram illustrating a relationship between a paper sheet feeding position and a sensor position according to the present embodiment.

FIG. 8 is a schematic diagram illustrating a relationship between a sheet feeding position and a sensor position according to the present embodiment.

FIG. 9 is a flowchart for explaining the operation of this embodiment.

[Explanation of symbols]

 2 Feeding roller 4 Braking plate (clamping member) 6 Conveying roller 7 Auxiliary roller 8 Optical sensor (sheet detecting means) 9 Control unit (control means) 10 Encoder (rotation amount detecting means) A Motor (Motor for feeding) B Motor (Transport motor) S Paper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Funato 1-8-12 Oyodonaka, Kita-ku, Osaka-shi, Osaka Laurel Machinery Co., Ltd. Inside the Osaka Research Laboratory (72) Inventor Mori Yoneya Oyodonaka, Kita-ku, Osaka-shi, Osaka 1-8-12 Laurel Machine Co., Ltd. Osaka Research Laboratory (56) References JP-A-61-23044 (JP, A) JP-A-59-190131 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] 1. A sheet counting machine configured to intermittently feed and convey and count sheets in a stacked state one by one from below, wherein the peripheral surface is formed of a high friction material, and A feeding roller for feeding leaves one by one in cooperation with a holding member; a feeding motor for rotating the feeding roller; and a paper sheet whose peripheral surface is formed of a high friction material and which is fed by the feeding roller. A transport roller that transports the paper in cooperation with an auxiliary roller; a transport motor that rotationally drives the transport roller; a paper sheet detecting unit that detects paper sheets passing through the transport roller; Rotation amount detection means for detecting the rotation amount, and from the time when the paper sheet detection means detects that the paper sheet fed from the feed roller reaches the conveyance roller, the rotation amount detection means performs the conveyance. Open detection of roller rotation And, braked motor for the feeding when the amount of rotation that the detection has reached the set value, the paper sheet detection
Means for detecting the paper sheet by the
And a control means for releasing the braking of the feeder and driving the feed roller . 2. The control device according to claim 1, wherein when the second and subsequent sheets are fed out and conveyed, the timing at which braking is applied to the feeding motor is detected by the sheet detection unit detected by the sheet detection unit. The setting value of the rotation amount detecting means is changed based on the length of the paper sheet up to the maximum.
Feeding device in a paper sheet counting machine.