JPH0646697Y2 - Paper guide mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A sheet guide mechanism provided with a deflector for guiding a sheet conveyed by driving a conveying roller, in order to smoothly guide the sheet without being caught by the deflector. For the purpose, when a sheet passes through the deflector, a plate that is rotated around the axis of the transport roller is provided, and the side end surface of the deflector is pressed against the plate so as to close the gap between the deflector and the guide. It is configured such that the tip portion is formed.

[Industrial application field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper guide mechanism provided with a deflector for guiding a paper that is transported by driving a conveying roller.

In a passbook printer that prints passbooks and slips, a deflector is usually used to cover the opening of the movable range where the print head can move and to guide the paper to the transport roller when sucking or discharging the paper such as a passbook. It is provided.

Therefore, such a deflector is formed so as to be retracted during printing by the print head and guide the paper when the print head is located at the home position.

[Conventional technology]

Conventionally, it is configured as shown in the conventional explanatory view of FIG. 4 (a) and (b1) are front views, (b2) are side views,
(B3) is a plan view and (c) is a cross-sectional view of a main part.

As shown in FIG. 4 (a), the paper 1 such as a passbook is taken in as shown by an arrow A by the guide 11, and is transported by the rotation of the conveying roller 2 and printed by the guide shaft 8 as an arrow. Printing is performed by the movement of the head 6.

When taking in such a sheet 1, the deflector 10
Is slid on the upper surface of the guide as shown by arrow B, and the paper 1
Even if there is a curl or a crease in the sheet, it is taken in by the conveying roller 2, and when printing is performed by the print head 6, the deflector 10 is slid and retracted in the direction opposite to the arrow B direction so that printing is performed. There is.

Therefore, when printing with the print head 6, the deflector is used.
10 was slid and retracted in the direction opposite to the arrow B direction, and printing was performed.

However, in such a configuration, a slide mechanism for sliding the deflector 10 is required, and the slide mechanism must be designed so as to be driven by taking in the paper 1 or by printing, which is expensive. .

Therefore, the configurations shown in (b1) (b2) (b3) have come to be used.

As shown in (b1), fixed guides 3 are arranged in front of and behind the platen 5 and the moving part of the print head 6 facing the platen 5, and a guideway for guiding the paper 1 is formed by the guides 3. The print head 6 has a winding unit 13
The belt-shaped deflector 4 that is pulled out further is fixed.

Therefore, when the paper 1 is taken into the transport roller 2,
Since the print head 6 is located at the home position, the deflector 4 is stretched as shown in (b2) and (b3), and the opening of the guide 3 which is the transfer area of the print head 6 facing the platen 5 is closed. Then, the transfer of the sheet 1 is guided.

Further, after the paper 1 is taken into the transport roller 2, the paper 1
For printing, the deflector 4 is wound around the winding unit 13 by moving the print head 6 from the home position, and the transfer area of the print head 6 is opened.

Therefore, the deflector 4 is interlocked with the drive of the print head, the deflector 4 is stretched by the print head 6 being positioned at the home position, and the deflector 4 is removed by driving the print head 6, In particular, it can be constructed inexpensively without providing a drive mechanism.

[Problems to be solved by the device]

However, such a deflector 4 needs to be configured to be wound up by the winding portion 13, and is usually formed by a thin spring strip or the like so that it can be wound by itself like a tape measure. Has been done.

Therefore, as shown in FIG. 4 (c), the deflector 4 is curved, and a gap is created between the side end surface of the deflector 12 shown at the portion D and the tip of the guide 3, so that the sheet 1 is transferred. At that time, the paper 1 is guided as shown by the arrow,
There is a problem that the sheet 1 is easily caught in the gap shown in the D portion.

Therefore, an object of the present invention is to smoothly guide the sheet by the deflector without being caught.

[Means for Solving the Problems]

 FIG. 1 is an explanatory view of the principle of the present invention.

As shown in FIG. 1, when the paper passes through the deflector,
A plate which is rotated around the axis of the conveying roller is provided, and the plate is formed with a tip portion for pressing the side end surface of the deflector so as to close the gap between the deflector and the guide. .

With this configuration, the above-mentioned problems can be solved.

[Action]

That is, a plate that is rotated about the axis of the transport roller is provided, and when the paper passes through the deflector when the paper is transported,
By rotating the plate, the side end surface of the deflector is pressed.

Therefore, the above-mentioned gap between the deflector and the guide can be closed, the conventional paper can be prevented from being caught in the gap, and the paper can be smoothly transferred.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a plan view of an embodiment of the present invention, FIG. 3 is an explanatory view of the present invention, and (a) and (b) are side views. Throughout the drawings, the same reference numerals denote the same objects.

As shown in FIG. 2, the plate 7 is rotatably locked to the shaft 2A of the conveying roller 2 arranged on both sides of the deflector 4 stretched by the print head 6. The other configurations are the same as those described above.

Further, the plate 7 locked to the R2 side of the transport roller 2 is rotated around the shaft 2A by the rotation of the gear 16C meshed with the gear 16A being transmitted through the torque limiter 15, and similarly.
The locked plate 7 is formed on the R1 side so that the rotation of the gear 16D meshed with the gear 16B is transmitted through the torque limiter 15 to rotate about the shaft 2A.

Further, the gears 16A and 16B are respectively connected to a one-way clutch 17 that transmits rotation only in the arrow direction of the shaft 2A, as shown in FIG. 3 (a).

Therefore, when the shaft 2A of the conveying roller 2 arranged on the R2 side is rotated in the direction shown by the arrow, the tip portion 7A of the plate 7 is shown by the arrows E1 and E2 shown by the dotted lines, as shown in (b). The side end surface 7A of the deflector 4 is pressed by the tip portion 7A, and the gap at the portion D is closed.

Therefore, the sheet 1 can be smoothly transported in the direction of arrow A1.

Further, when the shaft 2A of the conveying roller 2 arranged on the R1 side is rotated in the direction shown by the arrow, the plate 7 is rotated in the opposite direction to the above, and the side end surface 7A of the deflector 4 on the opposite side to the above is formed. It is pressed, and in this case, the sheet 1 can be smoothly transported in the direction of arrow A2.

With this configuration, for example, when the sheet 1 is sucked in the sheet suction direction indicated by the arrow in FIG. 2, it is provided on the R2 side in conjunction with the rotation of the transport roller 2 arranged on the R2 side. The plate 7 is rotated, the gap between the deflector 4 and the guide 3 is closed, and the leading edge of the sheet 1 to be sucked in is conveyed by the transport roller 2
When the sheet 1 is discharged in the direction opposite to the sheet suction direction indicated by the arrow, the sheet 1 is ejected in the direction opposite to the sheet feeding direction indicated by the arrow.
The plate 7 provided on the R1 side is rotated to move the deflector 4
The gap between the guide sheet 3 and the guide 3 is closed, and the leading end of the discharged sheet 1 is guided so as to be taken into the transport roller 2, so that the sheet 1 can be reliably sucked or discharged.

[Effect of device]

As described above, according to the present invention, both end surfaces of the deflector stretched around the position where the print head is moved are pressed by the rotation of the plate, depending on the sheet intake and discharge directions. Can close the gap between the deflector and the guide.

Therefore, it is possible to reliably suck and discharge the paper without jamming when sucking and discharging the curled or crease-like paper, and the rotation of the plate is interlocked with the conveyance roller. Since it is performed by doing so, it is not necessary to prepare a new power source, the cost can be reduced, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention, FIG. 2 is a plan view of an embodiment according to the present invention, FIG. 3 is an explanatory view of the present invention, (a) and (b) are side views, and FIG. In the conventional explanatory view, (a) and (b1) are front views and (b)
2) is a side view, (b3) is a plan view, and (c) is a cross-sectional view of the main part. In the figure, 1 is a sheet, 2 is a conveying roller, 3 is a guide, 4 is a deflector, 5 is a platen, 7 is a plate, 2A is a shaft, 4A is a side end face, and 7A is a tip.

Claims (1)

[Scope of utility model registration request] 1. A transport roller (2) for transporting a sheet (1).
And a guide (3) for guiding the transfer of the paper (1), and the transfer of the paper (1) by the driving of the transport roller (2) is stretched to face the platen (5). 4) In the paper guide mechanism that is guided by, when the paper (1) passes between the deflector (4) and the platen (5), the shaft (2A) of the transport roller (2) is centered. A plate (7) which is turned around is provided, and a side end surface (4A) of the deflector (4) is provided on the plate (7) so as to close the gap between the deflector (4) and the guide (3). A paper guide mechanism characterized by being formed with a pressing tip (7A).