JPH0747399Y2 - Media positioning mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] A guide plate having a guide wall for guiding the transfer of a medium and a leading edge of an inserted medium mounted on the rear end portion of the guide plate come into contact with each other to transfer the medium. When the stopper and the leading edge of the medium come into contact with the stopper, the stopper rotates to push the medium against the upper surface of the guide plate under the elastic member, and the stopper retracts and the pressing mechanism releases the pressure. Regarding a medium positioning mechanism including a roller that is driven later and transports the medium to a printing unit, etc., for the purpose of improving the positioning accuracy of the medium, the elastic member, when pressed against the medium, lower end The portion is elastically deformed in the guide wall direction.

[Industrial application field]

The present invention comprises a guide plate having a guide wall for guiding the transfer of a medium, a stopper mounted near the rear end of the guide plate and stopping the transfer of the medium when the leading edge of the inserted medium abuts. When the leading edge of the medium comes into contact with the stopper, it rotates to press the medium under the elastic member against the upper surface of the guide plate, and the stopper is retracted and the medium is driven after the pressing mechanism is released. The present invention relates to a medium positioning mechanism including a roller that conveys a medium to a printing unit or the like.

By mounting a medium such as a voucher or a form, the medium is inserted into the insertion port of a printer that prints out, the medium is positioned at a predetermined position, and a predetermined print is performed in a field to be printed.

When the medium is inserted, if the positional deviation occurs, printing is not performed in the printable column of the medium.

Therefore, such a printer requires a transfer device for positioning the medium at a predetermined position when the medium is inserted into the insertion port.

[Conventional technology]

FIG. 4 is a conventional explanatory view, (a) is a side view and (b) is a perspective view.

As shown in FIG. 4 (a), the medium 3 inserted along the guide plate 1 from the insertion port 15 as shown by the arrow C is
The leading edge 3B contacts the stopper 13. When the insertion / contact of the medium 3 is confirmed by the detection of the sensor 10, the pressing mechanism 12 is driven and the medium 3 is pressed by the guide plate 1 and the stopper
13 is retracted in the direction of arrow A, and a pair of rollers 11A,
The medium 3 on which 11B is closed is pinched by the rollers 11A and 11B.

Then, after the pressing of the pressing mechanism 12 is released, the roller 11A,
By the rotational drive of 11B, the medium 3 is printed by the printing unit 1 as shown by arrow B
It is transferred to 4, and the printing unit 14 performs predetermined printing.

The pressing mechanism 12 has a shaft 16A as shown in FIG. 4 (b).
A plate member 17 made of an elastic member such as rubber is fixed to a tongue piece 16B of a rotating bar 16 which rotates around the.

Wire 20 fixed to the plunger 19A of the solenoid 19
It is connected to the protrusion of the rotating bar 16 via the roll 21, and the rotating bar 16 is rotated in the direction in which the plate member 17 presses the medium 3 (direction of arrow D) by driving the solenoid 19.

To insert the medium 3 into the insertion port 15, one side edge of the medium 3
3A is placed on the guide plate 1 so that it contacts the guide wall 2, and the medium 3 is manually inserted.

When the leading edge 3B of the inserted medium 3 comes into contact with the stopper 13, the solenoid 19 is driven to rotate the rotating bar 16 according to a command from a controller (not shown), and the plate member 17 presses the medium 3. The medium 3 is positioned.

After the medium 3 is positioned, the medium 3 is transferred to the rollers 11A,
Since it is transferred to the printing unit 14 by 11B, predetermined printing is performed on the columns of the medium 3 to be printed.

[Problems to be Solved by the Invention] Conventionally, the medium is positioned at a predetermined position on the guide plate by rotating the rotating bar and pressing the plate member as described above.

At this time, if the medium is warped or wrinkled, when pressed by the plate material, the side edge of the medium separates from the guide wall of the guide plate and a gap is formed between the medium and the guide wall 2. If the medium is transferred to the printing section in the state where there is such a gap, there is a possibility that the printing may be shifted from a predetermined column.

The present invention was created in view of the above circumstances, and an object thereof is to provide a medium positioning mechanism with high medium positioning accuracy.

[Means for solving problems]

In order to solve the above conventional problems, the present invention provides a guide plate 1 having a guide wall 2 for guiding the transfer of a medium 3.
And a stopper 13 which is mounted near the rear end of the guide plate 1 so as to be shut off and retractable and which stops the transfer of the medium 3 when the leading edge 3B of the inserted medium 3 comes into contact with the leading edge 3B of the medium 3. When it comes into contact with the stopper 13, it rotates and the elastic member 5
A pressing mechanism 4 that presses the medium 3 against the upper surface of the guide plate 1 at the lower part of the roller, and a roller that drives the medium 3 to the printing unit 14 after the stopper 13 is retracted and the pressing mechanism 4 is released.
11A and 11B, the elastic member 5 has such a shape that the lower tip end portion thereof elastically deforms in the direction of the guide wall 2 when pressed by the medium 3.

[Action]

According to the present invention, the rotating bar rotates to cause the elastic member to move to the medium 3.
When is pressed against the guide plate, the lower tip of the elastic member is elastically deformed in the guide wall direction.

As a result, the medium shifts toward the guide wall and one side edge of the medium contacts the guide wall. Therefore, the medium is temporarily stopped before being inserted into the printing unit, the medium is positioned with high accuracy, and then the medium is transferred to the printing unit, so that the medium can be printed with high accuracy in a predetermined column to be printed. To be done.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.

FIG. 2 is an explanatory view of an embodiment according to the present invention, (a) is a perspective view, (b) is a front view of an elastic member, and FIG. 3 is a front view of an elastic member of another embodiment according to the present invention. Is.

As shown in FIG. 2, a guide plate 1 having a guide wall 2 for guiding the transfer of the medium 3, and a leading edge of the inserted medium 3 which is detachably mounted near the rear end of the guide plate 1 and is retractable. It is provided with a stopper 13 that stops the transfer of the medium 3 when 3B abuts on it.

Further, when the leading edge 3B of the medium 3 comes into contact with the stopper 13, it rotates to press the medium 3 against the upper surface of the guide plate 1 under the elastic member 5, and the retracting and pushing mechanism 4 of the stopper 13. The medium 3 is printed after the pressure is released by driving the medium 3.
And a pair of rollers 11A and 11B for transferring to.

The pressing mechanism 4 will be described in detail below.

Rotating bar 4A provided so as to cross the guide plate 1
, A pair of leaf springs 6A, 6B are arranged, and each leaf spring 6A, 6B
An elastic member 5 made of rubber or the like and having a saw-like shape in a front view is attached and fixed to the lower portion of 6B. The surface of the elastic member 5 opposite to the guide wall 2 of the guide plate 1 is a serrated inclined side surface.

The pressing mechanism 4 is driven by the solenoid 19 to rotate the rotating bar 4A.
Rotates about the shaft 4B in the direction of the arrow. The other structure of the pressing mechanism 4 is the same as the conventional structure, and thus detailed description thereof is omitted.

When the rotating bar 4A rotates, the elastic member 5 rotates in the direction of the guide plate 1 as indicated by the arrow F ₁ , and the elastic member 5 causes the medium 3 to move.
Is pressed against the guide plate 1. At the time of this pressing, the lower tip portion 5A of the elastic member 5 elastically deforms in the direction of the guide wall 2.

Therefore, the medium 3 slides on the guide plate 1 and is displaced in the direction of the guide wall 2, and the side edge 3A on the displaced side is the guide wall 2
, The entire side edge 3A comes into close contact with the guide wall 2 and the movement stops.

That is, the leading edge 3B of the medium 3 comes into contact with the stopper 13 to position the insertion position, and the side edge 3A is positioned to be positioned on the guide plate 1 with high accuracy.

Then, the pair of rollers 11A and 11B are closed to pinch the medium 3 according to a command from a control unit (not shown).

Next, after the stopper 13 is retracted and the pressing mechanism 4 is returned to release the pressing of the medium 3, the rollers 11A and 11B are rotationally driven to transfer the medium 3 to the printing unit 14.

Therefore, predetermined printing is performed on the section of the medium 3 to be printed.

By providing the elastic member 5 with a plurality of needles 7 made of a conductive material as shown in FIG. 3 so as to be electrically connected to the leaf springs 6A and 6B, the tips of the needles 7 come into contact with the medium 3 and It is possible to eliminate static electricity that has been charged.

[Effect of device]

As described above, according to the present invention, one side edge of the medium can be brought into contact with the guide wall, and the positioning accuracy of the medium is improved.

Therefore, there is a practically excellent effect that the predetermined printing is performed on the section of the medium to be printed.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention, FIG. 2 is an explanatory view of an embodiment according to the present invention, (a) is a perspective view, (b) is a front view of an elastic member, and FIG. 3 is the present invention. FIG. 4 is a front view of an elastic member of another embodiment according to FIG. 4, FIG. 4 is a conventional explanatory view, and FIG.
(B) is a perspective view. In the figure, 1 is a guide plate, 2 is a guide wall, 3 is a medium, 4 and 12 are pressing mechanisms, 5 is an elastic member, 10 is a sensor, 11A and 11B are rollers, 13 is a stopper, and 14 is a printing section.

Claims (1)

[Scope of utility model registration request] 1. A guide plate (1) having a guide wall (2) for guiding the transfer of a medium (3), and a guide plate (1) mounted and inserted in the vicinity of a rear end portion of the guide plate so as to be shut off and retractable. A stopper (13) that stops the transfer of the medium (3) by abutting the leading edge (3B) of the medium (3) and the leading edge (3B) of the medium (3) on the stopper (13). When contacted, it rotates to press the medium (3) under the elastic member (5) against the upper surface of the guide plate (1), and withdrawal and pressing of the stopper (13). The medium (3) is driven after the pressure of the mechanism (4) is released.
And a pair of rollers (11A, 11B) for transferring the sheet to the printing section (14). When the elastic member (5) is pressed by the medium (3), the lower tip end portion thereof is directed toward the guide wall (2). A medium positioning mechanism characterized in that it is elastically deformed into.