JPH02163237A - Belt conveying mechanism - Google Patents

Abstract

PURPOSE:To reduce a change in conveying speed and get rid of a hindrance such as jam, etc., caused by the skewing of bills by detecting the traveling speed of a belt and automatically regulating the force of a tensioner roller for pressing the belt in accordance with the detected speed to keep the conveying speed constant. CONSTITUTION:As a driving pulley 10 is rotated, the traveling speed of a belt 12 is detected by a detecting means 19. Based on this detected traveling speed, a regulating means 27 presses a tensioner roller 13 against the belt 12 with a regulated pressing force of a pressing means 17, thereby regulating the frictional force between the driving pulley 10 and the belt 12 to keep the traveling speed of the belt 12 constant. As a result, the occurrence of jam caused by the skewing of bills or inferiority in discrimination or housing caused by the abnormal approach of bills can be prevented.

Description

[Detailed Description of the Invention] [Summary] A belt conveying mechanism that can adjust the pressing force of a tension roller by detecting the running speed of the belt, and is capable of preventing jams of paper sheets being conveyed while keeping the belt running speed constant. In order to provide a belt conveyance mechanism that can prevent such problems, a tension roller is pressed against one side of the belt that is hung on a pair of drive pulleys and a driven pulley that are spaced apart, and the drive booby is rotated. A conveyance mechanism that drives the belt to run at a predetermined conveyance speed, comprising: a pressing means for pressing a tension roller against the belt; and a speed detection means for detecting the running speed of the belt when the drive pulley is rotationally driven.
The tension roller is configured to include an adjusting means for adjusting the pressing force of the pressing means based on the running speed of the belt determined by the speed detecting means, and the adjusting means adjusts the pressing force of the pressing means to press the tension roller against the belt.

[Industrial application field]

The present invention relates to a belt conveyance mechanism for banknotes in a banknote handling device or the like incorporated in an automatic transaction device, and particularly to a belt conveyance mechanism that can adjust the pressing force of a tension roller by detecting the running speed of the belt. .

Recently, automated teller machines (Ca
ch Dispenser (hereinafter referred to as CD)
Automated transaction devices such as chine (hereinafter referred to as ATM) are widely used. mechanisms are increasingly being used.

In this belt mechanism, the frictional force decreases due to elongation of the belt due to long-term use and dirt due to adhesion of paper dust, etc. on the banknotes, causing slippage and reducing the conveyance speed, resulting in problems such as jams due to skewed banknotes, and Abnormal proximity can lead to poor identification or poor storage, so we adjust the pressing force of the tension rollers and clean the dirt.However, there are many belt mechanisms used, making the work difficult and requiring time and money to maintain. Therefore, a method that can automatically adjust the pressing force of the tension roller is desired.

[Conventional technology]

FIG. 5 shows an internal side view of the banknote handling device incorporated in the ATV, and shows the deposit/withdrawal compartment 2, where banknotes 1 are inserted and received. Feeding unit 32 Authenticity of banknote 1.

Differentiation and counting section that discriminates and counts denominations 4. Storage mechanism 50a
50d, storage boxes 5a to 5c+storage box 5, which have feeding mechanisms 51a to 51c and store deposited and withdrawn banknotes 1 by denomination.
A jet box 5d is used to collect banknotes 1 fed out from a to 5c when they are judged incorrectly, and a reversing unit 6 where the banknotes 1 that have been judged and counted by the judgment and counting unit 4 are aligned with the front and back sides when a person withdraws money. A pool section 7 in which the aligned banknotes 1 are temporarily pooled. and a conveyance path 8 for conveying the banknote between these mechanisms.

With such a configuration, the banknotes 1 inserted into the deposit/withdrawal port 2 at the time of deposit are fed out one by one from the feeding section 3,
The denominations are conveyed along the conveyance path 8 and counted by the discrimination and counting section 4 for the front and back of the denomination, and then are sent to the pool section 7 with the front and back sides aligned in the reversing section 6 and accumulated. The counted amount is displayed on a display (not shown), and when the amount is confirmed by the customer, the banknote 1 is sent from the pool section 7 to the deposit/withdrawal slot 2, is fed out again, and the denomination is discriminated, and then stored in the storage mechanisms 50a to 50c. The coins are stored in storage boxes 5a to 5C by denomination.

At the time of withdrawal, bills 1 of the requested amount are sequentially fed out from the storage boxes 5a to 5c, counted for discrimination in the discrimination and counting section 4, sent to the pool section 7, and then collectively transferred to the deposit/withdrawal port 2. The money will be sent and withdrawn.

In this case, the banknotes 1 conveyed through the conveyance path 8 are conveyed at a high speed of, for example, 10 sheets/second.

In this way, the conveyance path 8 through which banknotes 1 are conveyed during cash withdrawal is constituted by a plurality of belt mechanisms, and as shown in FIG. hung, spring 14
The tension roller 13a is pressed against the lower side of the belt 12a by the tension roller 13a. The drive shaft 15 of the drive pulley 10a is connected to the motor M1, and the drive booby J10a rotates in the direction of arrow A due to the drive of the motor M1, and the belt 12a travels in the direction of arrow B due to the frictional force F expressed by the following equation. That is, F-Te)Ae where T: Tension of belt 12a-TI T2T1:
Tension on the pulling side TZ r Wk Tension on the pulling side μ: Friction coefficient between the drive pulley 10a and the belt 12a θ: N Indicates the winding angle between the moving pulley 10a and the belt 12a.

Further, as shown by the two-dot chain line in the figure, a drive pulley 10b is placed above the belt mechanism 9a in contact with the belt 12a.

Driven pulley Ilb, belt 12b, tensigine roller 1
3b.

A belt mechanism 9b is provided in which springs 14b are symmetrically arranged.

Furthermore, although not shown, a plurality (for example, three rows) of belt mechanisms having the same configuration as the belt mechanisms 9a and 9b are arranged in parallel at predetermined intervals in the lateral direction, that is, in the direction perpendicular to the drawing, and the three rows of belts are arranged in parallel. The mechanism allows the banknote 1 to be conveyed at high speed by sandwiching the horizontal dimension of the banknote 1.

Therefore, as the belts 12a and 12b stretch due to long-term use, the friction coefficient μ decreases as shown in FIG. 7, and the conveying speed decreases due to slipping.
, 14b, the tension roller 13a is pressed.

13b absorbs it and applies tension to belts 12a and 12b to ensure frictional force and prevent a decrease in conveyance speed.

c) Problems to be Solved by the Present Invention] According to the above conventional method, the tension roller is pressed against the belt by a spring, and although the elongation due to long-term use of the belt can be absorbed to a certain extent, elongation exceeding the limit can be absorbed. If there is, the belt cannot be absorbed and the frictional force decreases, and the belt tends to get dirty with paper powder and dust from banknotes, which reduces the coefficient of friction between the belt and the pulleys, causing slippage and slowing down the conveyance speed. When bills are held in multiple rows by belts from above and below and conveyed at high speed (for example, 10 bills per second), if the conveyance speed is uneven, the bills will run diagonally, causing jams, and the front and rear belt mechanisms may If the conveyance speed of the banknotes becomes uneven, there are problems in that the intervals between banknotes become abnormally close to each other, leading to failure detection, poor identification, and poor storage due to failure of gate operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a belt conveyance mechanism that can maintain a constant running speed of the belt and prevent jamming of conveyed banknotes.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In the figure, 10 is a driving pulley, 11 is a driven pulley, 1
2 is a belt, 13 is a tension roller, 17 is a pressing means for pressing the tension roller 3 against the belt 12, and 19 is a belt 120 when the drive boot is driven to rotate.
Speed detecting means for detecting the running speed; reference numeral 27 is an adjusting means for adjusting the pressing force of the pressing means 17 based on the running speed of the belt 12 determined by the speed detecting means 19;

Therefore, the adjustment means 27 is configured to adjust the pressing force of the pressing means 17 to press the tension roller 13 against the belt 12.

[Effect]

When the driving pulley lO is driven to rotate, the speed detection means 19 detects the running speed of the belt 12, and the adjusting means 27 adjusts the pressing force of the pressing means 17 based on the running speed. By pressing the tension roller 13 against the belt 12 with an adjusted pressing force, the pressing means 17 can adjust the frictional force between the drive pulley 10 and the belt 12 and control the running speed of the bell H2 at a constant level. This makes it possible to prevent paper jams due to skewed feeding of banknotes, as well as poor discrimination and poor storage due to abnormal proximity of front and rear banknotes.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 and 3. In FIG. 2, parts corresponding to those in FIG. 1 are shown surrounded by a dashed line. The same reference numerals refer to the same objects throughout the design.

FIG. 2 shows an example in which the present invention is applied to the belt conveyance mechanism of the bill handling device described in the conventional example.

As shown in FIG. 2(a), a hollow shaft 16 is rotatably fitted to the drive shaft 15a of the drive pulley 10a of the belt mechanism 9C, and one end of the lever 17a is attached to the hollow shaft 16.
A tension roller 13 that rolls into contact with the drive pulley 10a via a belt 12c wrapped around the drive pulley 10a at the other end.
a is rotatably supported. The hollow shaft 16 is a motor h
It is connected to 2.

As shown in FIG. 2(b), holes 18 are provided along the entire circumference of the belt 12c at equal intervals on the edge of the belt 12c. A transmission type optical sensor (hereinafter referred to as a sensor) is located at the opposite position.
A light emitting element 20a and a light receiving element 20b of 19a are arranged.

Further, in the block diagram of FIG. 2(C), 21 is a sensor amplifier, 22 is an analog/digital (hereinafter referred to as A/D) conversion circuit, 23 is a timer, 24 is a speed comparison circuit,
25 is a drive control section, and 26 is a reference clock generation circuit.

27 is an arithmetic control section, 28 is a power amplifier, and 29 is a main control section.

The reference clock generation circuit 26 generates a reference clock C corresponding to the set running speed of the belt 12c using the start of rotation of the motor M1 as a trigger.

The timer 23 controls the belt 1 detected by the sensor 19a.
The period of the hole 18 of 2C is counted in time.

The speed comparison circuit 24 compares the counting time of the timer 23 with the reference clock sent from the reference clock generation circuit 26 to determine the difference in positive and negative speeds.

The arithmetic control unit 27a converts the rotation angle θ1 of the hollow shaft 16 based on the difference between positive and negative speeds sent from the speed comparison circuit 24.

The drive control unit 25 controls the rotation of the motor I'll that drives the belt mechanism 9c according to the command from the main control unit 29, and also controls the rotation angle of the lever 17a based on the rotation angle θ1 calculated by the calculation control unit 27a. The excitation of motor M2 is controlled to rotate and hold it by θ1. That is, when the running speed is "slow" relative to the set speed, the lever 17a is rotated by the rotation angle θ1 in a direction (in the direction of arrow C) that increases the winding angle and tension of the belt 12c, and when the running speed is "fast", the lever 17a is rotated by the rotation angle θ1. 17a is rotated by a rotation angle θ1 in a direction (in the direction of the arrow) that reduces the winding angle and tension of the belt 12c. Then motor M2 is excited by the chopper (
For example, the excitation current is reduced to 173 to 1/2 of that of rotation), and the lever 17a is locked in that position.

Since it has such a configuration and function, the operation will be explained with reference to the flowchart in FIG. 3.

(1) First, when the device starts trading, the drive control section 25 is started, the motor M1 is driven, the drive pulley 10a is rotated, and the belt mechanism 90 starts driving.

(2) Using this as a trigger, the reference clock C is sent from the reference clock generation circuit 26 to the speed comparison circuit 24.

(2) A detection signal from the sensor 19a that detects the hole 18 in the belt 12c passes through the sensor amplifier 21 and the A/D conversion circuit 22, where the timer 23 counts the period of the hole 18 and sends it to the speed comparison circuit 24.

(2) The speed comparison circuit 24 compares the counted time with a reference clock, and sends the positive/negative difference to the arithmetic control section 27.

(2) The arithmetic control unit 27 converts the difference between positive and negative speeds into a rotation angle θ1 and sends it to the drive control unit 25 via the power amplifier 28.

■The drive control unit 25, based on the positive/negative and rotation angle θ1,
The motor 42 is driven to rotate the lever 17a. That is, when the speed of the belt 12C is lower than the set speed, the lever 17a is rotated by the rotation angle θ in the direction of the arrow C, and then the motor n2 is excited by the chopper to move the lever 1
Lock 7a in position.

- If the speed of the belt 12c is faster than the set speed, rotate the lever 17a by the rotation angle θ in the direction of the arrow, and then energize the chopper and lock it in that position.

(2) The speed detection of the belt 12c continues until the transaction ends, and the flow from (2) onwards is repeated.

Therefore, by adjusting the winding angle of the belt 12c around the drive pulley foa and the pressing force of the tension roller 13a that presses the belt 12c, it is possible to secure the frictional force and control the running speed to a predetermined speed.

A different embodiment is shown in FIG. The difference between the embodiment shown in FIG. 4 and the embodiment explained in FIG. Drive pulley lO
The winding angle of the belt 12c with respect to b and the force pressing the tension roller 13a against the belt 12c are mm, and the tension roller 13a at the tip of the lever 17b is rotated by the rotation shaft 16a whose other end is fixed. 12c
The pressing force used to press the can be adjusted.

Therefore, the speed detection of the belt 12c and the rotation angle adjustment of the lever 17b are the same as in the previous embodiment.

In this way, by controlling multiple belt mechanisms placed on the conveyance path, the friction force decreases due to elongation of the belt due to long-term use, and the friction coefficient decreases due to dirt such as paper powder, causing the drive pulley to slip. By automatically pressing the tension roller against the belt, it is possible to prevent the conveyance speed of the belt from slowing down. This prevents the conveyed banknotes from being skewed due to uneven speed, and prevents jams and other problems. can do.

In the above examples, the case where the tension roller is pressed against the belt by rotation of a lever has been described, but the tension roller may be moved up and down by other methods, for example, by rotation of a feed screw.

In addition, although a case has been described in which a hole in the belt and a transmission type optical sensor are used as means for detecting the speed of the belt, other methods may also be used. The same effect can be obtained by a method of detecting the magnetism using a magnetic material, or by a method of attaching and arranging a magnetic material to a belt and detecting the magnetism using a Hall element or the like.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to detect the running speed of the belt and automatically adjust the force with which the tension roller presses the belt according to the detected speed to keep the conveying speed constant. ■Changes in conveyance speed due to slippage caused by a decrease in frictional force due to belt elongation and a decrease in friction coefficient due to dirt on the belt with paper dust etc. are reduced, and problems such as jams due to skewed bills are reduced. It is possible to prevent the occurrence of poor discrimination and poor storage due to abnormal approach of banknotes.

■It saves the trouble of cleaning belt dirt and extends the maintenance period.

There is an effect.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the principle of the present invention; Figure 2 is a diagram showing an embodiment of the invention; Figure 3 is a flowchart of the embodiment; Figure 4 is a diagram showing a different embodiment; An internal side view of a banknote handling device to which the present invention is applied, FIG. 6 is a configuration diagram of a conventional belt mechanism, and FIG. 7 is a diagram showing changes in the coefficient of friction due to elongation of the belt. In the figure, 12.12a to 12c are belts, ! 3.13a is a tension roller, 17 is a pressing means, 17a is a lever, work 8 is a hole,
9 is a speed detection means, 19a is a sensor,
23 is a timer, 24 is a speed comparison circuit,
25 is a drive control section, 26 is a reference clock generation circuit, 27 is an adjustment means, 27a is an arithmetic control section, old, M
2 indicates a motor. /3. Tenzukenrolla 10 shots to the principle clear gyrus/note (0) side fD mouth (b) belt/1 explanation + invention lol Ikao 1 product is mouth Fig. 2 (inf) Real 4 Flowchart of 4 columns Fig. 3 (C) 《《　《　《《《《《《《《《《《〉《〉《〉《〉《《《《《《《《《《《《《《》 , d Benikawa] Shireibu (Kano r pages kyaboku 4th step,! nμ Go's eye-remending Di 5 old

Claims (1)

[Claims] A tension roller (13) is pressed against one side of a belt (12) that is hung on a pair of drive pulleys (10) and a driven pulley (11) arranged at an interval, and the drive pulley (1
0) to run the belt (12) to obtain a predetermined conveyance speed, the conveyance mechanism comprises a pressing means (17) for pressing the tension roller (13) against the belt (12); , when the drive pulley (10) is rotationally driven, the belt (1
2) speed detection means (19) for detecting the running speed of the belt (12); and adjustment means for adjusting the pressing force of the pressing means (17) based on the running speed of the belt (12) determined by the speed detection means (19). (27), and the adjusting means (27) adjusts the pressing force of the pressing means (27) to move the tension roller (13) to the belt (
12) A belt conveyance mechanism characterized by pressing.