JPH0439013Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a paper feed guide device for a printer that can be applied to both continuous paper and single sheets.

<Prior Art> The structure of this type of paper supply guide device is such that a pair of sprockets linked to feed holes drilled on both sides of continuous paper are arranged parallel to each other behind a roll-shaped platen facing the print head. , the continuous paper is run from the feeding position of the sprocket to the front circumferential surface of the platen facing the print head, and a cut sheet insertion guide that is long in the width direction is disposed at the rear upper part of the platen, There is a device in which the platen is guided to the rear circumferential surface of the platen.

<Problem to be solved by the invention> By the way, in such a configuration, the leading edge of the continuous paper fed onto the printer body from the paper outlet of the printer body is caused by the backward feeding action of the platen to reach the cut sheet insertion guide. may enter the insertion port side. In this case, the leading edge gets caught in the insertion slot, obstructing the running of the continuous paper, causing the continuous paper to wave on the body, or in some cases being re-fed to the platen and wrapping around the platen. This may cause problems such as.

The present invention aims to eliminate such troubles.

<Means for Solving the Problems> The present invention is characterized in that a short paper stopper that blocks the insertion opening is attached to the ticket insertion guide so as to be slidable along the ticket insertion guide. It is something to do.

<Function> When feeding continuous paper, slide the paper stopper to position it within the running width of the continuous paper so that the leading edge of the paper sent to the paper outlet of the body is inserted into the cut sheet insertion guide. Avoid getting it in your mouth. Further, when feeding a paper sheet from the insertion opening, the paper stopper is slid laterally and the paper stopper is fed while being guided by its edge.

<Embodiment> An embodiment of the present invention will be described with reference to the accompanying drawings.

1, 4, and 5, a roll-shaped platen 3 is rotatably supported at the rear end of the body 2 of the printer 1. As shown in FIGS. A motor (not shown) is provided at one end of the platen 3 via a driving gear, and the platen 3 is rotated in the feeding direction by the motor. An opening 4 is formed at the rear end of the body 2 from the top of the platen 3 to the rear side, and the front edge of the opening 4 serves as a paper outlet 4a from the platen 3.

Inside the printer body 2, a carriage 6 carrying a print head 5 is disposed in front of the platen 3, and is moved back and forth along the platen 3 by a reversible drive motor (not shown). Further, in front of the carriage 6 is a ribbon cassette 7.
is attached, and the ink ribbon is placed on the platen 3.
and the printing head 5.

A guide surface 9 is formed at the lower part of the platen 3 and includes a circular arc surface along the circumference of the platen 3 and a substantially linear surface extending rearward from the arc surface, the rear end of which coincides with the rear end of the opening 4. This serves as the entrance for the continuous paper x to the printer body 2.

A pin tractor unit 12 is installed at the rear of the printer body 2 for supplying continuous paper x to the opening 4.

The pin tractor unit 12 has an elongated housing with a U-shaped cross section that matches the width of the printer body 2, and a pair of sprockets 15, 15 are fixed to both sides of the housing 13. A guide shaft 14 is mounted thereon. When the pin tractor unit 12 is attached to the printer body 2, the guide shaft 14 is connected to the drive motor of the platen 3 via a gear, and is rotated in synchronization with the platen 3.

A cover 17 is placed over the pin tractor unit 12, and continuous paper x is supplied from between the rear wall and the rising rear wall of the housing 13. The continuous paper x is fed forward within the unit 12 by being engaged with the claws of the sprockets 15, 15 through feed holes y, y, which are formed at regular intervals on both sides of the paper.

A continuous paper supply path 1 extends from the feeding position of the sprockets 15, 15, reaches the front peripheral surface of the platen 3 facing the print head 5, and further reaches the paper outlet 4a formed on the upper surface of the printer body 2.
8 is composed.

Next, the main parts of the present invention will be explained.

A ticket insertion guide 20 is fitted onto and supported by a drive shaft protruding from both ends of the platen 3. That is, as shown in FIG. 3, the insertion guide 20 has approximately the same length as the platen 3, has an approximately triangular side surface shape with one side serving as a guide surface 21 for the continuous paper A long insertion port 22 is transparently provided downward from the guide surface 21. The inner surface of the insertion port 22 expands toward the guide surface 21 and has an inclined rear surface 2.
3 is the contact guide surface of the cut sheet z. Further, an arcuate fitting edge 24 is formed at the rear edge of the insertion opening 22 .

At both ends of the insertion guide 20, there are shaft support pieces 25, 25 for supporting a paper guide 40, which will be described later.
is projected upward.

Further, at both ends, fork-shaped connecting legs 26, 26 that fit onto the drive shaft of the platen 3 are projected forward and downward, and on the side surfaces of the connecting legs 26, 26, the side wall 11 of the opening 4 is provided. Mounting piece 2 that comes into contact with
7 and 27 are installed vertically at intervals.

The insertion guide 20 is held above the opening 4, and in the holding position, the guide surface 21 is tilted forward to match the tangent to the platen 3 as shown in FIGS. are aligned with the rear circumferential surface of the platen 3, and the shaft support pieces 25, 25 are gently inclined rearward and protrude upward.

Paper stoppers 30, 30 according to the present invention are attached to the insertion guide 20, as shown in FIGS. 4 and 5.

The paper stoppers 30, 30, as shown in FIG.
1, a fitting portion 32 having a circular cross-section with an inner diameter equal to the outer diameter of the fitting edge 24 is formed in a wound shape to constitute a mounting base. Moreover, a shielding plate part 34 is formed from one end thereof, which fits into the opening of the insertion port 22 in an even manner together with the linear part 31 . The upper edge of the shielding plate portion 34 is connected to the fitting portion 3
2, and its tip 35 contacts the upper surface of the guide surface 21 of the insertion guide 20. The circular opening 35 of the fitting part 32 is made smaller than the outer diameter of the fitting edge 24, and a guide surface 36 parallel to the straight part 31 is formed at the winding end of the fitting part 32. ing.

A serrated sliding surface 39 that continues in the width direction is formed on the upper surface of the fitting portion 32 and the shielding plate portion 34 .

Paper stoppers 30, 30 having the above configuration
As shown in FIG. 6, a pair of shielding plate parts 34 is provided, one provided at the right end and the other located at the left end, and each shielding plate part 34 is located on the outside. placed in relation to said insertion guide 20
The fitting portion 32 is inserted from the notched hole 35 into the fitting edge 24 of the
, by using its flexure to push in the fitting part 32.
is tightly fitted to the outer periphery of the fitting edge 24, the linear portion 31 and the shielding plate portion 34 are fitted into the insertion opening 22, the tip 35 is brought into contact with the guide surface 21, and the insertion guide 20 is attached. In this installed state, each paper stopper 30, 30 can be slid in the width direction with a finger using the sliding surface 39 using the fitting edge 24 as a guide.

A paper guide 40 having the same width as the insertion guide 20 is connected to the shaft support pieces 25, 25 projecting upward from the insertion guide 20, and the lower edge of the paper guide 40 and the upper edge of the insertion guide 20 are connected to each other. A space s is formed between them, and they are rotatably supported.

The paper guide 40 rotates rearward and has its lower edge abutted against stoppers 28, 28 formed on the shaft support pieces 25, 25, so that the paper guide 40 reaches the upright position shown in FIG. 5, where it is gently tilted rearward. Retained. In this upright position, the front side is the insertion opening 2 of the insertion guide 20.
It is continuous with the inclined rear surface 23 of No. 2.

Further, the paper guide 40 can be rotated forward from the upright position, and in the lying position shown in FIG.
comes into contact with. In this lying position, the paper guide 40 covers the opening 4 and has a paper outlet 4 between it and the guide surface 21 of the insertion guide 20.
A guide path 4 for continuous paper x from a to the distance s
2 is constructed.

In this configuration, in order to print on the continuous paper x, first move the paper stoppers 30, 30 toward the center as shown by the chain line in FIG. The distance is within the paper width of paper x. Next, the paper guide 40 is placed in the lying position as shown in FIG.

Therefore, the continuous paper x sent from the pin tractor unit 12 by the sprockets 15, 15
The ink ribbon travels around the circumference of the platen 3 and is transferred to the ink ribbon of the ribbon cassette 7 at the print head 5 position to be printed. Furthermore, in accordance with the designated row pitch, intermittent feeding is performed by rotating the sprockets 15, 15 and the platen 3, so that the guide path 42
and is taken out onto the printer body 2 from a distance s.

When the continuous paper x travels along the guide path 42, the shielding plate portions 34, 34 of the paper stoppers 30, 30 are positioned at intervals within the paper width of the continuous paper x. Therefore, the leading end of the paper is obstructed by the shielding plate parts 34, and cannot pass into the insertion opening 22. Therefore, only a normal run is taken out onto the printer body 2 from the above-mentioned interval s.

In addition, in order to print the cut sheet z, the paper guide 40 is placed in the upright position as shown in FIG. 5, and then the paper stoppers 30, 30 are moved in the separating direction. When setting such a separation distance, the shielding plate portion 3
By making the distance between 4 and 34 substantially coincide with the width of the cut z as shown in the solid line position in FIG. 6, when inserting the cut z, the shielding plate parts 34 and 34
A guiding effect can be produced by defining the left and right end positions of. The cut sheet z is supplied to the insertion port 22 from between the paper stoppers 30, 30, travels along the rear peripheral surface of the platen 3, is printed by the print head 5, and is taken out from the paper outlet 4a.

Note that even if the paper guide 40 is not attached as described above, the paper sent from the paper outlet 4a is
Since there is a sufficient possibility that the paper may enter the insertion opening 22 due to the rearward feeding action of the platen 3, the effect of mounting the paper stoppers 30, 30 is produced.

In the embodiment described above, a pair of paper stoppers 30, 30 are provided on the insertion guide 20, but even if there is only one paper stopper, the desired effect can be achieved by arranging it within the running width of the continuous paper x. can. Furthermore, when using a single sheet, a guiding effect can be produced by defining the position of one edge of the sheet with the paper stopper.

<Effects of the invention> As described above, in the present invention, a paper stopper is slidably attached to the insertion opening of an insertion guide for supplying single sheets, and when continuous paper is applied, the paper stopper is slid. Since the continuous paper is positioned within the running width of the continuous paper to prevent the continuous paper from passing through the insertion slot, the paper is wound around the top of the printer when the continuous paper is caught in the entrance of the insertion slot. It is also possible to prevent troubles during paper feeding, such as paper entering backwards and getting caught in the platen. Furthermore, when inserting a paper sheet from the insertion guide, by sliding the paper stopper to an optimal position, the position of the edge of the paper sheet to be inserted can be defined and a guiding action can be produced. It has a positive effect.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of the printer 1, and FIG. 2 is a perspective view of the paper stopper 3.
3 is an isolated perspective view of the main part, Fig. 4 is a vertical sectional side view of the main part with continuous paper applied, and Fig. 5 is the same side view with single sheet applied, FIG. 6 is a plan view of the main parts with the paper guide 40 omitted. 1...Printer, 2...Printer body, 3...
...Platen, 5...Print head, 4...Aperture, 1
2... Pin tractor unit, 15... Sprocket, 20... Insertion guide, 22... Insertion port,
21... Guide surface, 24... Fitting edge, 30... Paper stopper, 32... Fitting part, 34... Shield plate part, 40... Paper guide, x... Continuous paper, z...
…Single sheet.

Claims (1)

[Claims for Utility Model Registration] A roll-shaped platen facing a printing head; and a continuous paper supply path extending from a rear position of the platen to a front circumferential surface facing the printing head, and further extending to a paper outlet of a printer body. , a ticket insertion guide disposed at the rear upper part of the platen and guided to the rear circumferential surface of the platen and having an insertion opening long in the width direction, the ticket insertion guide having an insertion opening therein; 1. A paper supply guide device for a printer, characterized in that a short paper stopper for blocking the paper is slidably mounted along the ticket insertion guide.