JPS5922993Y2 - Print media guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guide device for a printing medium in a letter-by-letter printing device.

Conventionally, in this type of printing device, when the printing medium is fed into the printing section via the guide means, the leading edge of the medium separates from the guide means and the printing surface of the printing section and constantly moves on the printing surface. The printer often got stuck in the printer's printing mechanism, causing problems such as jams.

Therefore, in order to prevent such problems from occurring,
A proposal that provides a guide device for the print medium such as a print head retraction device and a movable guide device to prevent the medium guide means and print surface from coming off, and to ensure that the medium is inserted into the printing unit in a normal state. However, these devices have a complicated structure, have a high possibility of failure, and have the drawback of lacking reliability.

In addition, when two types of print media, continuous paper and single sheets, are used at the same time, when manually setting continuous paper to the printing unit, the power guide device provided to guide the single sheets is used. This was an obstacle to the work of setting continuous paper, requiring skill and time, and reducing work efficiency.

Therefore, an object of the present invention is to provide a printing medium power-assisted device that eliminates the above-mentioned drawbacks by installing a belt in the printing mechanism so that it can freely cover the right side of the printing surface of the printing section. That is.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

The printing device 1 has a platen 2, which is a printing section, as shown in FIGS. 1 and 2, and a printing surface 2a of the platen 2.
A print head 3 constituting a print mechanism is provided opposite to the print head 3 with its tip 3a protruding onto the print surface 2a.

The print head 3 is mounted on a carrier 6 that is slidably fitted and supported by a shaft 5 provided parallel to the print surface 2a of the platen 2, and the carrier 6 is moved along the shaft 5 onto the shirt by an appropriate moving means. , arrow A shown in FIG.
It can move in the direction B, and therefore the print head 3 can also move in the directions A and B in the figure along the printing surface 2a.

Further, a flat belt 7 is provided on one side of the tip of the carrier 6 on the side of the platen 2, with one end fixedly attached. The right side of the printing mechanism 2a is installed so as to face and cover the printing surface 2a.

Further, the other end of the bell I.7 is connected to a winding shaft 10 provided on the side of the platen 2.
The first
One rotational force in the C direction in the figure is applied, so the bell 1
.about.9 is also constantly energized in the B1-i direction.

On the other hand, in the lower part of the printing part 2a of the platen 2 in FIG.
A continuous paper guide groove 12 having a diameter of 1 is provided,
Each predetermined sheet of paper can be supplied to the printing surface 2a.

Since the present invention has the above configuration, the printing device 1
When printing the print medium in the printer 1, the print head 3 is moved to the far right in the figure, as shown in FIG. 3, if the medium is continuous paper.

Then, the belt 7 that has been covering the printing part 2a of the platen 2 until now is moved to the right of the head 3, and the belt 7 is moved to the winding shaft 1.
0, and the printed surface 2a is in an open state.

In this state, insert the continuous paper 13 along the force field groove 12 as shown in FIG. By lifting up the paper 13, the setting of the paper 13 is immediately completed.

Next, when setting a cut sheet on the print surface 2a with the continuous paper 13 set, the print head 3 is moved to the left jj in the figure as shown in FIG.
is pulled out from the winding shaft 10 to cover the printing section 2a into which the cut sheet is inserted.

In this state, as shown in FIG. 2, when inserting the medium 15 from l-'-j5 along the guide groove 1 opened in the extending direction of the printing surface of the platen 2, the printing section 2a
is covered by the bell 1 and 7, so even if the tip of the cut sheet 15 is curled, it will not separate from the guide groove 11 and the printing surfaces 2a and h- and be pulled out to the outside, and can be attached to the platen. The upper side of the cut sheet is reliably set at a predetermined position on the printing surface 2a since it is passed by hand from the guide formed by the bells 1 to 1 and guided into the guide groove 11.

Therefore, the print head 3 is moved to the print surface 2 by the carrier 6.
a in the directions A and B in FIG. 1, and printing is performed on the print medium 15 and continuous paper 13, but since the medium is securely set in the predetermined position, it is easy to print. The medium does not rise above the printing surface 2a, and problems such as jams do not occur.

Note that the rotational force of the winding shaft 10 is smaller than the driving force of the carrier 6, and does not interfere with the printing operation of the carrier 6 and the print head 3.

In addition, in the embodiment described in -L, a case was described in which a flat belt-shaped bell I-7 was used, but this is not limited to a flat belt-shaped bell I-7. Of course, it is also possible to use a coiled spring with an appropriate cross-sectional shape such as a winding shaft 10, as shown by the imaginary line in Figure 1, instead of using the winding shaft 10. Of course, it is also possible to install the formed belt 7 etc. via the pulley 16.

As explained above, according to the present invention, the bell 1-7 is installed on the carrier 6 and the like constituting the printing mechanism so that it can freely cover the printing surface 2a of the platen 2, which is the printing section, on the right side of the printing mechanism. , the printing surface 2a of the continuous paper 13 is sometimes opened, and the printing surface 2a is opened when the cut sheet 15 is set.
Since the belt 7 covers the sheet 15 and prevents the sheet 15 from separating from the guide groove 11 serving as the guide means and the printing surface 2a, it is possible to prevent the sheet 15 from separating from the printing surface 2a and the guide groove 11, which is the guide means. Not only will the guide device of the print head 3 not get in the way and reduce work efficiency,
There is no need to provide a guide device with a complicated structure such as a retracting device or a movable guide device, which can contribute to lowering product costs.

In addition, the guide device itself has an extremely simple structure with the bell l-7 as its main component, so the possibility of failure is extremely low.
Product reliability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a letter-by-letter printing device to which the present invention is applied, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a view of the printing medium. 1...Printing device, an operation diagram showing the operation of the device 2...Printing section (platen), a...Printing surface, 3...Printing Mechanism (print head), 6...Print mechanism (carrier), 7
... Bell l-113 ... Printing medium (continuous paper), 15 ... Printing medium (single sheet).

Claims (1)

[Scope of utility model registration request] In a printing device that has a printing section and a printing mechanism, and performs a printing operation on a printing medium on the printing section by moving the printing mechanism along the printing surface of the printing section, the printing device moves along the platen that forms the printing surface. A continuous form guide having an opening in the direction of winding the platen and a ticket storage guide having an opening in the direction of extending the printing surface of the platen are provided below the platen, and are movable along the printing surface. By arranging a belt on the right side of the printing mechanism configured to face the platen and configuring the right side to be freely covered according to the space position of the printing mechanism, continuous forms can be inserted when the printing mechanism is at the rightmost position. What is claimed is: 1. A guide device for a printing medium, characterized in that the printing mechanism constitutes a front insertion guide for a cut sheet when the printing mechanism is in the leftmost state.