JP2806911B2 - Media holding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium holding mechanism, and more particularly, to a medium holding mechanism in a passbook printer installed in a financial institution or the like.

[0002]

2. Description of the Related Art FIGS. 3 and 4 are block diagrams of a medium holding mechanism of a conventional passbook printer.

In FIGS. 3 and 4, the left side is a suction / discharge port for the medium 1, and a print section of the printer is provided on an extension of the right side. In the transport path of the medium 1, a hold bar 14 that can be moved up and down on the curved plate 6 via a link mechanism 5 by a curved plate 6 and a solenoid 3 and a transport roller 7 and a solenoid that is rotated via a belt 11 by a transport motor 12 A tension roller 8 which is moved by a link mechanism 10 via a link mechanism 10 to be pressed against or separated from the transport roller 7 and a light transmitting sensor 13 for detecting the medium 1 are provided. When the medium 1 is sucked from the suction / discharge port in the direction of arrow A and when the medium 1 is conveyed from the printer body to the suction / discharge port in the direction of arrow B, the hold bar 14 is raised and bent as shown in FIG. The tension roller 8 is separated from the face plate 6, and the tension roller 8 is in contact with the transport roller 7, and the medium 1 is transported by the transport roller 7.

When the transmission type sensor 13 detects that the medium 1 printed from the printer main body is conveyed to the suction / discharge port in the direction of arrow B and reaches a predetermined position, the conveyance roller 7
Stops, and the medium 1 is stopped. Next, the hold bar 14 is lowered so that the ejected medium 1 does not fall, and the medium 1 is pressed against the curved plate 6 by the hold bar 14. Next, the tension roller 8 pressing the transport roller 7 from below.
Is lowered and the medium 1 is held only by the hold bar 14 to realize the medium pressing.

[0005] In addition, as another conventional medium pressing mechanism, there is one which is used in a printer disclosed in Japanese Patent Application Laid-Open No. 04-226776 to prevent the discharged medium from falling.

[0006]

The medium even mechanism of the conventional passbook printer described above presses a rod-shaped hold bar against the medium to hold the medium. Therefore, when the medium is manually pulled out, the medium to be handled is a copy paper. In such a case, there is a problem that indentations are formed on the medium. Further, there is a problem that the medium held by the hold bar is manually removed just before being conveyed to the printing position in order to print again, and printing may not be performed.

[0007]

According to the present invention, there is provided a medium holding mechanism for conveying a medium along a conveyance path, a fixed curved plate provided along the conveyance path, and a stop on the conveyance path. And a hold roller that presses and holds the formed medium against the curved plate, and presses the hold roller strongly against the curved plate so that the medium cannot be removed from between the curved plate and the hold roller. A medium can be removed from between the curved plate and the hold roller by pressing the curved plate lightly.

According to the medium holding mechanism of the present invention, a conveyance roller and a tension roller provided on a conveyance path between a medium suction / discharge port and a printing position, and a medium conveyed from the printing position reaches the suction / discharge port. A fixed curved plate provided along the transport path,
A hold roller that presses and holds the medium that has been conveyed from the printing position side by the conveyance roller and the tension roller and reached by the sensor to reach the suction / discharge port and stopped against the curved plate. By pressing the hold roller strongly against the curved plate, the medium cannot be removed from between the curved plate and the hold roller, and the hold roller is pressed weakly against the curved plate to prevent the medium from being removed. It is characterized in that the medium can be removed from between.

In the medium holding mechanism of the present invention, it is preferable that the hold roller is made of an elastic material so that the hold roller is deformed into an elliptical shape when strongly pressed against the curved plate.

[0010]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of a medium pressing mechanism of a passbook printer according to an embodiment of the present invention.

In FIG. 1, the left side is the medium 1 in the direction of arrow A.
The medium holding mechanism is provided on a transport path following the suction / discharge port. The transport path for transporting the medium 1 is provided with a transmission sensor 13 for detecting the medium 1 whose end is located at the suction / discharge port. A tension roller 8 for pressing the medium 1 from below to suck and discharge the medium 1
The tension roller 8 can be moved up and down by a tension roller lifting solenoid 9 via a link mechanism 10. The transport roller 7 disposed at a position opposite to the tension roller 8 is connected to the transport motor 1 via a belt 11.
2 driven.

In order to hold the medium 1, a tip end portion has a rotatable circular hold roller 2 made of a material having elasticity such as rubber, and the hold roller 2 is connected to a hold roller lifting solenoid 3 via a link mechanism 5. The hold roller 2 is pressed against the medium 1 by the operation of the plunger 4. A curved plate 6 is provided on the lower side facing the hold roller 2, and the medium 1 is sandwiched between the hold roller 2 and the curved plate 6. The hold roller lifting solenoid 3 is controlled so as to reduce and increase the strength of the current, and the stroke operation distance of the plunger 4 at the time of weak current flowing half of the rated current is equal to the entire length of the tension coil spring 15 for returning the plunger 4. Balancing with the pulling force at half the extension. The stroke operating distance of the plunger 4 when all the rated currents flow is set by the coil spring 15
Is near the full extension length of the roller and balances the pulling force, and the hold roller 2 is also elastically deformed.

Next, the operation will be described.

FIG. 1 shows a state in which a full rated current is applied to the hold roller lifting solenoid 3. The printed medium 1 is transported in the direction of arrow B by the transport roller 7 and the tension roller 8 and the transmission sensor 13 detects a change in light transmission from light blocking due to the movement of the medium 1 and stops the transport roller 7 to stop the medium 1. Let it. Next, the full rated current is passed, the plunger 4 of the hold roller lifting solenoid 3 is operated, and the circular hold roller 2 is moved through the link mechanism 5 to the medium 1.
, The hold roller 2 is deformed into an elliptical shape to hold the medium 1. Due to the elliptical shape, the rotation of the hold roller 2 can be prevented, and the removal of the medium 1 by manual operation can be prevented. Therefore, in the next operation, the energization of the hold roller lifting solenoid 3 is stopped, the pressing of the hold roller 2 is released, and the conveyance roller 7 and the tension roller 8 are operated, so that the medium 1 can be reliably conveyed to the printing position, and reprinting can be performed.

FIG. 2 shows a state in which half of the total rated current is applied to the hold roller lifting solenoid 3. As in the case described with reference to FIG. 1, the transmission type sensor 13 detects that the printed medium 1 has reached the suction / discharge port, and stops the medium 1. A half of the total rated current is passed to operate the plunger 4 of the hold roller elevating solenoid 3 and the link mechanism 5
The circular hold roller 2 is pressed against the medium 1 via the.
Here, since the hold roller 2 is pressed against the medium 1 with a weak force, the hold roller 2 maintains a circular shape and can hold the medium 1 with a small pressing force. Therefore, when the medium 1 is manually extracted, the hold roller 2 rotates and the medium 1 can be extracted without damaging the medium 1.

[0017]

As described above, according to the present invention, the medium held between the hold roller and the curved plate is enhanced by increasing or decreasing the force with which the medium conveyed along the transport roller is pressed against the curved plate by the hold roller. When pulling out by hand, weakening the holding roller holding force makes it possible to remove the medium from between the curved plate and the hold roller without damaging it, leaving imprints on the medium such as a copy slip. It is possible to extract without any problem. Also, before the medium is conveyed from the suction / discharge port to the position where printing can be performed again, the holding force of the hold roller is increased so that the medium is not manually pulled out, so that the medium can be extracted from between the curved plate and the hold roller. Prevents the effect of preventing reprinting from becoming impossible or preventing the medium from being skewed when the medium is taken out halfway and becomes skewed with respect to the conveyance path and is conveyed again to the printing position, There is an effect that the medium can be set again without skewing to the printing position.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a medium pressing mechanism according to an embodiment of the present invention, in which a hold roller 2 is strongly pressed.

FIG. 2 shows a hold roller 2 of the medium pressing mechanism shown in FIG.
It is a figure in the state where is pressed weakly.

FIG. 3 is a configuration diagram of a conventional medium pressing mechanism, showing a state in which a hold bar 14 is separated from a curved plate 6;

FIG. 4 is a configuration diagram of the conventional medium pressing mechanism shown in FIG. 3;
FIG. 4 is a diagram illustrating a state in which the hold bar 14 is pressing the medium 1 against a curved plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Medium 2 Hold roller 3 Solenoid 4 Plunger 5 Link mechanism 6 Curved plate 7 Transport roller 8 Tension roller 9 Solenoid 10 Link mechanism 11 Belt 12 Transport motor 13 Transmission sensor 14 Hold bar 15 Coil spring

Claims (3)

(57) [Claims] 1. A transport means for transporting a medium along a transport path, a fixed curved plate provided along the transport path, and a hold for pressing and holding the medium stopped on the transport path against the curved plate. And a roller, wherein the hold roller is pressed strongly against the curved plate so that the medium cannot be removed from between the curved plate and the hold roller, and the hold roller is weakly pressed against the curved plate, and the curved plate and A medium holding mechanism for removing a medium from between the hold rollers. 2. A conveyance roller and a tension roller provided on a conveyance path between a medium suction / discharge port and a printing position;
A sensor for detecting that the medium conveyed from the printing position has reached the suction / discharge port, a fixed curved plate provided along the conveyance path, and a side of the printing position by the conveyance roller and the tension roller. And a hold roller that presses and holds the medium that has been conveyed from the sensor and stopped by being detected by the sensor to reach the suction / discharge port against the curved plate, and strongly presses the hold roller against the curved plate. The medium is not removed from between the curved plate and the hold roller, and the medium is removed from between the curved plate and the hold roller by weakly pressing the hold roller against the curved plate. Media holding mechanism. 3. The medium press mechanism according to claim 1, wherein the hold roller is made of an elastic material and deforms into an elliptical shape when strongly pressed against the curved plate.