JP2849315B2 - Paper transport device - 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 transporting device for transporting paper between a paper transporting belt to which a rotational force is applied and a paper transporting belt.

[0002]

2. Description of the Related Art First, FIGS. 3 to 6 show a conventional example.
A driving roller 3 and a driven roller 4 to which the rotational force of the motor 1 is transmitted by a transmission belt 2 are rotatably provided at a predetermined interval, and the driving roller 3 and the driven roller 4 are provided with endless paper sheets. The conveyor belt 5 is stretched. The inner surface of the paper sheet transport belt 5 is supported by a plurality of rotatable belt support rollers 6, 7, 8. Between the supporting roller 8 and the driving roller 3, a tension roller 9 for applying tension to the paper sheet transport belt 5 is urged upward and is rotatably provided. Further, a magnetic head 12 for writing and a magnetic head 13 for reading are fixedly provided facing the belt supporting roller 6.

[0005] At both ends of a movable support 11 rotatably held by a fulcrum shaft 10, an idler roller 14 located on the axis of the fulcrum shaft 10 and a displacement urged outward by a spring 15 are provided. A free tension roller 16 is provided, and an endless paper pressing belt 17 is stretched between the idler roller 14 and the tension roller 16. Further, a plurality of pinch rollers 18 are urged toward the paper sheet transport belt 5 by a spring 19 and held on the movable support 11 so as to be displaceable. These pinch rollers 18 are disposed to face any one of the driving roller 3, the driven roller 4, and the belt supporting rollers 6, 7. FIG. 4 is a side view of the driving roller 3, the driven roller 4, the pinch roller 1 when viewed from the direction of arrow A in FIG.
Reference numeral 8 denotes a crown roller whose central portion has a large diameter.

Next, the operation will be described. When the motor 1 is driven clockwise, the sheet transport belt 5 rotates clockwise. The paper pressing belt 17 is tensioned by the tension roller 16 and pressed against the paper conveying belt 5 by the pinch roller 18, so that the paper pressing belt 17 rotates following the paper conveying belt 5. Therefore, the sheet 20 is conveyed between the sheet conveying belt 5 and the sheet pressing belt 17.

[0005]

In order to transport the paper sheet 20 without slipping on the paper transport belt 5, a tension roller is used to prevent the paper sheet 20 from slipping on the paper transport belt 5. It is a necessary condition that the sum of the pressing forces P1, P2, P3, and P4 of the pinch roller 18 by the spring 19 be larger than the force Ft of the spring 15 for urging the spring 16. However, due to manufacturing variations, the sum of the pressing forces P1, P2, P3, P4 and the spring 1
It is difficult to maintain a balance with the force Ft of No. 5.

In this case, as shown in FIG. 5, it is assumed that the movable support 11 is rotated upward about the fulcrum shaft 10 for jam clearance. In this case, the pinch roller 18 separated from the sheet transport belt 5 applies a pressing force P of the spring 19.
1, P2, P3, and P4 displace downward from the state shown by the imaginary line as shown by the solid line.
6 is displaced from the state shown by the imaginary line to the direction in which the force Ft of the spring 15 acts as shown by the solid line, but if the force Ft of the spring 15 is too weak, the paper pressing belt 17 becomes slack, and the idler roller The paper pressing belt 17 comes off from the tension roller 14 and the tension roller 16.

As shown in FIG. 6, when the movable support 11 is rotated downward about the fulcrum shaft 10 and the movable support 11 is fixed by a lock mechanism (not shown), the pinch roller 18 From the state shown by the imaginary line due to the resistance, the spring 19 rises while bending the spring 19 as shown by the solid line,
The tension roller 16 is displaced outward from the state shown by the imaginary line as shown by the solid line to apply tension to the sheet pressing belt 17, and at this time, the pressing forces P1, P
If 2, P, 3P, and P4 are too weak, the force of pressing the paper sheet 20 against the paper sheet transport belt 5 becomes weak, thereby slipping the paper sheet 20 and disturbing the feed amount of the paper sheet 20. In particular,
When writing or reading magnetic data, the data writing position or reading position is misaligned, which has a large effect.

[0008]

According to the first aspect of the present invention,
An endless paper transport belt provided between a drive roller driven by a motor and a driven roller is provided, and a movable support is provided so as to be able to freely contact and separate from the paper transport belt. A plurality of pinch rollers opposed to the sheet transport belt and an intermediate pinch roller disposed between these pinch rollers and urged toward the sheet transport belt, and at least one of the pinch rollers is provided. provided displacement means spacing to other of said pinch roller displaces the narrow AMS1 accordance away the pinch roller from the paper sheet transport belt urges the paper sheet transport belt side to the movable support, elastic The endless paper pressing belt formed of a material that expands and contracts in a continuous manner always has a free length regardless of the displacement position of the pinch roller and the intermediate pinch roller. The paper presser belt looped over the pinch roller to impart tension to the long loop Ri.

According to a second aspect of the present invention, in the first aspect of the present invention, the pinch roller displaced by the displacement means is urged toward the sheet transport belt by the tension of the sheet pressing belt.

[0010]

According to the first aspect of the present invention, since the sheet holding belt is always tensioned and stretched over the pinch roller, even when the movable support is separated from the sheet conveying belt, the pinch roller is not used. In addition, it is possible to prevent the sheet holding belt from loosening regardless of the displacement position of the intermediate pinch roller, and prevent the sheet holding belt from coming off from the pinch roller due to the loosening. Further, in a state where the movable support is brought close to the sheet transport belt, the movable pinch roller can be displaced in a direction to increase the tension of the sheet pressing belt by the pressure received from the sheet transport belt. The sheet pressing action by the tension of the sheet pressing belt in addition to the pressing force of the intermediate pinch roller can be promoted, so that the feed amount of the sheet can be made accurate. further,
The displaceable pinch roller can also be used as a tension roller.

According to a second aspect of the present invention, a pinch roller is provided to press the sheet against the sheet conveying belt by urging the displaceable pinch roller toward the sheet conveying belt with the tension of the sheet pressing belt. The biasing spring can be omitted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 3 to 6 will be described using the same reference numerals. Although not shown, a frame 21 having opposed side plates 21a is provided. A motor 1 is mounted on the frame 21, and a driving roller 3 and a driven roller 4 to which the rotational force of the motor 1 is transmitted by a transmission belt 2 are rotatably provided at a predetermined interval. An endless sheet transport belt 5 is stretched between the driving roller 3 and the driven roller 4. The paper sheet transport belt 5 is made of a material with little elasticity in order to make the amount of paper sheet 20 fed accurately. A plurality of belt support rollers 6, 7, 8 supporting the inner surface of the paper sheet transport belt 5 are rotatably held by a frame 21. Also, the frame 21
A tension roller 9 for applying tension to the sheet transport belt 5 between the support roller 8 and the driving roller 3 is urged upward and is rotatably provided. Further, a magnetic head 12 for writing and a magnetic head 13 for reading are provided on the frame 21 so as to face the belt supporting roller 6.

A movable support 22 is rotatably held by the fulcrum shaft 10 on the frame 21. The movable support 22 has a U-shaped cross section with a lower opening,
At both ends, tension arms 25 and 26 for rotatably holding pinch rollers 28 and 29 are provided rotatably about a support shaft 24. These tension arms 2
5 and 26 are urged by the torsion spring 27 toward the sheet transport belt 5. These tension arm 25 and 26, and functions the pinch roller 29 as a displacement means for spacing both be displaced in the narrow AMS1 according to separated from paper sheet transport belt 5. Of course, a groove (not shown) may be formed on the movable support 22 as a displacement means along a radius centered on the support shaft 24, and the shafts of the pinch rollers 28 and 29 may be displaceably held by the groove. .

Further, an intermediate pinch roller 30 located between the pinch rollers 28 and 29 is rotatably provided on the movable support member 22 by being biased toward the sheet conveying belt 5 by a spring 19. . An endless paper pressing belt 31 having a highly stretchable polyester sheet as a core is stretched between the pinch rollers 28 and 29 and the intermediate pinch roller 30. In the present embodiment, the paper holding belt 31 is set to have a free length of about 100 mm, and is tensioned so that the total length is about 108 mm in the state of FIG. The driving roller 3, the driven roller 4, and the pinch rollers 28 and 29 are crown rollers having a large diameter at the center, but flat rollers may be used. In such a case, appropriate tension may be applied to the sheet transport belt 5 and the sheet pressing belt 31.

Further, a locking pin 33 having a knob (not shown) at an end thereof is urged in one direction in the elongated hole 32 formed in the movable support member 22 so as to be slidably held. I have. A V-shaped notch 34 is formed at the upper edge of both side plates 21 a of the frame 21, and a locking claw 35 that engages with the locking pin 33 is formed at one side of the bottom of the notch 34. I have.

In such a configuration, when the motor 1 is driven clockwise, the sheet transport belt 5 rotates clockwise, and the sheet pressing belt 31 rotates following the sheet transport belt 5, so that the sheet transport belt 5 is rotated. The sheet 20 is conveyed between the sheet 5 and the sheet pressing belt 31.

The locking pin 33 is slid so that the locking claw 35
When the movable support 22 is rotated upward about the fulcrum shaft 10 for jam clearance as shown in FIG. 2, the tension arms 25 and 26 at both ends are moved to the sheet pressing belt 31.
And the biasing force of the torsion spring 27 rotates the sheet conveying belt 5. The rotation range at this time is determined by a part of the tension arms 25 and 26 abutting on the ceiling surface 23 of the movable support 22. In this state, the distance between the pinch rollers 28 and 29 at both ends is narrowed. However, even in this state, the paper holding belt 31 has a total length of about 30 mm so as to limit the amount of downward displacement of the intermediate pinch roller 30 by the spring 19. A tension of about 104 mm is applied. Therefore, the paper pressing belt 31 does not come loose from the pinch rollers 28 and 29.

As shown in FIG. 1, the movable support 22 is pivoted downward about the fulcrum shaft 10 and the locking pin 33 is fixed to the locking claw 3.
5, the pinch rollers 28, 29 are pushed up by the resistance of the sheet transport belt 5, so that the tension arms 25, 26 move upward against the tension of the sheet pressing belt 31 and the urging force of the torsion spring 27. The intermediate pinch roller 30 rises against the pressing force of the spring 19 due to the tension of the sheet pressing belt 31. In this state, since the interval between the pinch rollers 28 and 29 is widened, tension is applied to the sheet pressing belt 31 so that the total length becomes about 108 mm.

Further, the movable support 22 is connected to the sheet transport belt 5.
Side, the tension arms 25 and 26 holding the pinch rollers 28 and 29 are moved to the sheet transport belt 5.
Can be rotated in a direction to increase the tension of the sheet pressing belt 31 by the pressure from the pinch rollers 31. Thereby, the pinch rollers 28, 29 held by the tension arms 25, 26 are also used as tension rollers to reduce the number of parts. can do. In addition, since the pinch rollers 28 and 29 are urged toward the sheet conveying belt 5 by the tension of the sheet pressing belt 31, the sheet is dependent on the properties of the sheet 20 to be conveyed or the tension applied to the sheet pressing belt 31. Since the torsion spring 27 that urges the tension arms 25 and 26 in the direction in which the lever 20 is pressed can be omitted, the structure can be further simplified.

In this embodiment, the paper sheet 20 used is a card such as a ticket on which a magnetic stripe is formed, but another paper sheet may be used.

[0021]

According to the first aspect of the present invention, as described above,
A movable support that is held so as to be able to freely move toward and away from the paper sheet transport belt; a plurality of pinch rollers facing the paper sheet transport belt; An intermediate pinch roller urged toward the belt side is provided, and at least one of the pinch rollers is urged toward the paper sheet conveyance belt side, and as the pinch roller separates from the sheet conveyance belt, the distance between the pinch roller and other pinch rollers is increased. provided a displacement means for displacing the narrow AMS1 the movable support, longer than always free length regardless displacement position of the elastically stretchable pinch roller and the intermediate pinch rollers to paper presser endless belt formed of a material When the movable support is separated from the paper transport belt because the paper presser belt is stretched around the pinch roller with tension applied to form a loop. Also, regardless of the displacement position of the pinch roller and the intermediate pinch roller, it is possible to prevent the sheet pressing belt from loosening, prevent the sheet pressing belt from coming off from the pinch roller due to the loosening, and When the pinch roller is displaced close to the sheet transport belt, the pinch roller can be displaced in a direction to increase the tension of the sheet holding belt by the pressure received from the sheet transport belt. In addition to the above, the paper holding action by the tension of the paper holding belt can be promoted,
Therefore, it is possible to make the feeding amount of the paper sheet accurate.
Further, the number of components can be reduced by using the displaceable pinch roller as a tension roller.

According to a second aspect of the present invention, in the first aspect of the invention, the pinch roller displaced by the displacement means is urged toward the sheet transport belt by the tension of the sheet holding belt, so that the sheet is A spring for urging the pinch roller to hold down the conveyance belt can be omitted.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a state where a movable support is separated from a paper sheet conveying belt.

FIG. 3 is a vertical sectional front view showing a conventional example.

FIG. 4 is a side view in which a part is sectioned when viewed from the arrow A in FIG. 3;

FIG. 5 is a vertical sectional front view showing a state where the movable support is separated from the paper sheet transport belt.

FIG. 6 is a vertical sectional front view showing a state where the movable support is brought close to the paper sheet transport belt.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 3 drive roller 4 driven roller 5 sheet transport belt 20 sheet 22 movable support 25, 26 displacement means 28, 29 driven roller 30 intermediate pinch roller 31 sheet pressing belt

Claims (2)

(57) [Claims] An endless paper transport belt stretched between a driving roller driven by a motor and a driven roller is provided, and a movable supporter is provided so as to be freely movable toward and away from the paper transport belt. A plurality of pinch rollers opposed to the sheet transport belt and an intermediate pinch roller disposed between the pinch rollers and urged toward the sheet transport belt; At least one said displacement means spacing to other of said pinch roller displaces the narrow AMS1 accordance away the pinch roller from the paper sheet transport belt urges the paper sheet transport belt movable support An endless paper pressing belt formed of a material that elastically expands and contracts is provided on the body and has no relation to the displacement position of the pinch roller and the intermediate pinch roller. A sheet conveying device, wherein a tension that forms a loop longer than a free length is always applied, and the sheet pressing belt is wound around the pinch roller. 2. The sheet conveying device according to claim 1, wherein the pinch roller displaced by the displacement means is urged toward the sheet conveying belt by the tension of the sheet pressing belt.