JPH1044575A - Equipment for preventing stain of heading letter in printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for preventing stain of a heading letter in a printer which prevents an action of an excessive force of rotation on a printing endless band itself on the occasion of restricting this rotation, so as to avoid impairment such as abrasion or a crack, and makes a selecting wheel run idle when the printing endless band is rotated forcibly, so as to prevent the printing endless band from being loaded so much. SOLUTION: Based on ideas that a member regulating the rotation of a selecting wheel 5 is made to be of a movable type and that a movable stopper member 14 is moved at the time when an excessive force acts on the selecting wheel 5 or a printing endless band 7, a stopper support member 15 coming into contact with an elastic part 14B of the movable stopper member 14 is provided and the movable stopper member 14 is made movable by the engagement of a projecting part 7E for driving with the elastic part 14B accompanying the movement of the printing endless band 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing heading character stains in a printer, and more particularly to an apparatus for preventing heading character stains in a printer attached to a portable label printing / sticking apparatus (handler labeler). is there.

[0002]

2. Description of the Related Art In a conventional hand labeler or the like,
Printed characters and heading characters are formed on a printing endless band, which is rotated so that the desired printed characters can be printed, ink is applied to the printed characters with an ink roller, etc., and the label is stamped. ing.

[0003] However, if the printing endless band is made rotatable to an arbitrary rotation range, ink is applied to the heading characters in opposition to the ink roller.
This can get dirty.

[0004] As such a device for preventing heading characters from being stained (ink application avoiding means), for example, Japanese Patent Publication No. Sho 62-330.
No. 80, in the "print belt structure", a protruding piece is provided on a rotating disk for rotating the endless band for printing, and a stopper is provided near a rotation range region of the endless band for printing. Abuts on the rotating disk so that the rotating disk can rotate only in a predetermined area. However, in this apparatus, if the protruding piece interferes with the heading character, or if the rotating piece is rotated with excessive force when the protruding piece abuts on the stopper, the printing endless band is elongated, resulting in poor printing. ,
There is a problem of coming off.

[0005] In the "printing apparatus" disclosed in Japanese Patent Application Laid-Open No. 6-155878, a convex portion is formed on the outer peripheral surface side of the endless band for printing so that the endless band can be engaged with a stopper and an inclined surface is formed on the inner peripheral surface side. When the endless band for printing reaches the limit position and tries to rotate it forcibly,
I try to slip. However, in this apparatus, there is a problem that a slip when the endless band for printing is rotated with an excessive force causes damage such as abrasion or a crack on the inclined surface of the endless band for printing. In addition, since the convex portion is formed on the outer peripheral surface of the printing endless band, there is a problem that the number of printing characters that can be provided on the printing endless band is reduced.

[0006] In Japanese Patent Application Laid-Open No. 6-71146, "An Appearance Prevention Device for Smearing Characters in a Printer", a printing section having a thicker cross section formed on an outer peripheral surface of an endless band for printing corresponds to a leg of an indicator. The contact limits the rotation range of the endless band for printing. However, even with this apparatus, when it is rotated with an excessive force, there are problems such as damage to the indicator and damage to the endless band for printing such as wear and cracks. Furthermore, there is also a problem that the endless band for printing gets under the indicator and passes therethrough.

In the "printing device" disclosed in Japanese Patent Publication No. 4-34951, rotation of the printing endless band is restricted by engagement of a nose formed on the printing endless band with a stopper shoulder. However, this device also has a problem that the endless band for printing is stretched when rotated with an excessive force, or is damaged such as abrasion or a crack.

In either structure, when the rotation of the printing endless band is to be restricted in a predetermined area in order to prevent the heading character from being stained, an external force acts largely or directly on the printing endless band. It is difficult to avoid doing so, and there is a problem of damage or elongation, and further, a problem that the intended purpose cannot be achieved because the protruding member gets over the stopper.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is intended to prevent a heading character in an endless band for printing from being positioned at a printing receiving portion, that is, facing an ink roller. It is an object of the present invention to provide a headline character stain prevention device in a printing device which can prevent the stain from occurring.

Further, according to the present invention, in limiting the rotation of the printing endless band, it is possible to prevent an excessive rotational force from acting on the printing endless band itself, thereby avoiding damage such as wear and cracks. An object of the present invention is to provide a headline character stain prevention device in a printing device.

Further, the present invention provides an apparatus for preventing heading character contamination in a printing device which can minimize the reduction in the number of printing characters even when a projection member or the like is formed to limit the rotation of the printing endless band. The task is to provide

Further, according to the present invention, when the rotation of the printing endless band is restricted, if the printing endless band is forcibly rotated, the selection wheel is caused to idle and the printing endless band is not so much loaded. It is an object of the present invention to provide an apparatus for preventing a headline character from being stained in a printer.

[0013]

Means for Solving the Problems That is, the first invention is:
The member (movable stopper member) for restricting the rotation of the selection wheel is a movable type having an elastic portion. When an excessive force is applied to the selection wheel or the endless band for printing, the movable stopper member is moved and printing is performed. The first invention focuses on causing the endless band for use to be partially disengaged from the engaged state with the selection wheel to generate slack and to make the selection wheel idle. An endless band for a heading character in a printing device which has a printing endless band provided between the base portion and a printing character and a heading character, and wherein any of the printing characters of the printing endless band can be selected. And a moderation boss portion that engages with the selection wheel, and an elastic portion on the print cradle portion side. A movable stopper member located between the selection wheel and the print receiving base portion; a stopper receiving member that contacts the elastic portion of the movable stopper member to regulate the movement of the movable stopper member; A driving projection positioned on the inner peripheral surface of the endless band for use and engageable with the elastic portion of the movable stopper member, and the driving projection and the elasticity associated with the movement of the printing endless band are provided. And a movable stopper member that can be moved by engagement with a head unit.

By providing a stopper guide for guiding the movable stopper member in the movable direction, the movable action of the movable stopper member can be stabilized.

Since the elastic portion has a bifurcated locking spring portion, the bifurcated locking spring portion can be elastically deformed in the horizontal direction when the movable stopper member is used, for example, for vertical operation. Enhancement of the engagement between the driving projection and the elastic portion of the endless band for
The elastic movement of the movable stopper member can be performed smoothly.

The stopper receiving member has a receiving portion inclined surface for receiving the elastic portion, so that when the movable stopper member moves, the elastic portion is elastically deformed along the receiving portion inclined surface, so that the endless band for printing. In addition to further strengthening the engagement between the driving projection and the elastic part, the elastic movement of the movable stopper member can be performed smoothly.

The endless band for printing has a printing blank portion on its outer peripheral surface, and the inner peripheral surface of the heading character adjacent on the rotation direction side of the printing blank portion can be a flat portion. (Second embodiment). That is, on the inner peripheral surface of the heading character adjacent to the printing blank portion on the rotation direction side, a projection that can be engaged with the selection wheel is not formed, and the connection between the selection wheel and the endless band for printing is prevented. This prevents the selection wheel from spinning easily.

According to a second aspect of the present invention, there is provided an endless band for printing which is provided between a selection wheel and a printing cradle and has printed characters and a heading character formed thereon. A dirt prevention device for a heading character in a selectable printing device, comprising: a stopper member located between the selection wheel and the print receiving base portion; and a stopper member located on an inner peripheral surface of the endless band for printing. A driving projection that can be engaged with the member, and by the engagement of the driving projection and the stopper member with the movement of the printing endless band, a slack is generated in the printing endless band. The above-mentioned selection wheel is made to rotate idle, thereby preventing a heading character from being stained in a printer.

In the apparatus for preventing a headline character from being stained in a printing device according to the present invention (first invention), a moderation boss portion and an elastic portion are formed on a movable stopper member, and the moderation boss portion engages with a selection wheel and has an elastic portion. By elastically deforming, it is possible to obtain a moderation in the selection operation of the printing characters of the printing endless band (a proper setting state of the printing characters on the printing cradle portion for each character, or a distinction between the setting states).

Therefore, by rotating the selection wheel and rotating the endless band for printing around it, it is possible to arbitrarily select the printing character and the heading character of the endless band for printing, but the heading character is transferred to the ink roller. Immediately before reaching the print receiving table portion where there is a possibility of contact (contact), the driving protrusion of the printing endless band is engaged with the elastic portion of the movable stopper member, and the rotation is temporarily stopped. (Resistance action).

When the selection wheel is further rotated beyond the resistance action, the elastic portion is elastically deformed, and the movable stopper member itself slightly moves toward the print receiving base. Thus, the rotational sliding resistance between the moderation boss of the movable stopper member and the selection wheel is lower than in the normal print selection state, and the driving projection and the elasticity are formed from the engagement portion between the printing endless band and the selection wheel. As a result, the endless band for printing between the portion and the engagement portion is loosened and the engagement with the selection wheel is released, so that the selection wheel idles.

Therefore, the heading character can be prevented from being stained without being rotated and positioned to the rotation region of the ink roller, and the excessive force for further rotating the selection wheel can be reduced. Rather than being applied to the driving protrusion or the elastic portion of the movable stopper member via the printing endless band, it acts on the direction causing the idle rotation between the moderation boss portion of the movable stopper member and the selection wheel, and acts for printing. It is possible to reliably prevent the printing endless band from being stained without damaging the endless band.

Further, since a driving projection is provided on the inner peripheral surface of the endless band for printing and can be engaged with the elastic portion of the movable stopper member, printing characters and heading characters are provided on the outer peripheral surface of the endless band for printing. Since these are formed, these numbers are not reduced.

In the second invention, when the printing endless band is engaged with the stopper member and its rotation is prevented, the printing endless band becomes slack, and the selection wheel and the printing endless band are loosened. There is a possibility that the rotating action from the selected wheel does not act on the endless band for printing even if it is separated or in contact with Absent.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an apparatus for preventing a headline character from being stained in a printer according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the printing device 1, and FIG. 2 is a cross-sectional view taken along line II-II of FIG.
Is a heading character stain prevention device 2 and a printer frame 3
And an operation shaft 4 for selecting a print, and a selection wheel 5 having a plurality of rows.
, A printing tray 6, and a plurality of rows of printing endless bands 7.

The printer frame 3 has a heading window 8 at its upper part and an ink roller facing opening 9 at its lower part. A press frame 3A is formed on the printer frame 3. In the ink roller facing opening 9, the ink roller R rolls so as to be able to contact the endless band 7 for printing.

The operating shaft 4 selects (determines) an endless band 7 for printing in an arbitrary row by moving the operating shaft 4 in the axial direction, and rotates the selecting wheel 5 in the determined row to thereby obtain the endless band for printing. This is for selecting a specific print character in the band 7 and has an indicator 10 attached and a rotary pin 1
1 is protruded (see FIG. 2). In particular, as shown in FIG. 2, the operating shaft 4 has a plurality of rows of indexing grooves 4A formed on the outer peripheral surface thereof at equal intervals in the axial direction. The operating shaft 4 and the indicator 10 can be set (indexed) in a predetermined row by an indexing spring 13 for urging the operating shaft 4 in the direction of the indexing groove 4A.

The indicator 10 moves integrally with the operation shaft 4 in the axial direction of the operation shaft 4, is free to rotate in the direction, and has a pointer portion 10A protrudingly formed in the index window portion 8. The part 10A is adapted to guide a desired row.

The rotary pin portion 11 moves and rotates integrally with the operation shaft 4, protrudes from the inner peripheral surface of the selection wheel 5, and engages with the inner peripheral engagement groove 5A of the selection wheel 5 in an arbitrary row. It is possible.

As shown in FIG. 1, an endless band 7 for printing is stretched between the selection wheel 5 and the printing tray 6 with a predetermined tension. The printing endless band 7 has a predetermined number of printing characters 7A and heading characters 7B formed on the outer peripheral surface of the band endlessly.
However, a print blank portion 7C is formed in each boundary region. As described later, when the rotation of the selection wheel 5 is stopped to prevent the movement of the printing endless band 7, each print blank portion 7C is formed. 7C faces the index window 8 and the opening 9 facing the ink roller.

On the inner peripheral surface of the printing endless band 7, the portion corresponding to the printing character 7A is flattened, and the portion corresponding to the heading character 7B is engaged with the outer peripheral engaging groove 5B of the selection wheel 5, respectively. Possible low drive projection 7
D, and a high driving projection 7E are formed.

If the number of high driving projections 7E is right and left on the inner peripheral surface of the printing endless band 7, it depends on the number of printing characters 7A and heading characters 7B. It can be set arbitrarily over a predetermined area of the peripheral surface.

The low driving projection 7D and the high driving projection 7E engage with the outer peripheral engagement groove 5B of the selection wheel 5, and the rotation of the selection wheel 5 causes the arbitrary printing character 7A.
Can be brought into contact with the ink roller R at the ink roller facing opening 9.

However, heading character 7B does not contact ink roller R. That is, as shown in FIG. 1 in particular, the printer frame 3 is provided with a plurality of rows of movable stopper members 14 and stopper receiving members 15.

The movable stopper member 14 is positioned between the selection wheel 5 and the print receiving base 6 and has a pair of detent bosses 14 engaged with the selection wheel 5.
A and an elastic portion 14B on the print receiving table 6 side.

Further, the movable stopper member 14 enables the moderation boss portion 14A to be engaged with and disengaged from the outer peripheral engagement groove 5B of the selection wheel 5. However, as shown in FIG. 1, a long guide window 14C is formed at the center of the movable stopper member 14, and a stopper guide portion 3B protrudingly formed on the printer frame 3 is formed.
The guide long window 14C is fitted therein. In the normal selectable state, an upper gap S1 is provided between the guide long window 14C and the stopper guide portion 3B, and the movable stopper member 14 can move downward and return in the drawing. .

The elastic portion 14B has a bifurcated locking spring portion 14.
D and a projection locking portion 14 that engages with the high driving projection 7E.
E and an elastic portion inclined surface 14F.

The stopper receiving member 15 is located between the movable stopper member 14 and the print receiving base 6, and has a receiving portion inclined surface 15A which comes into contact with the elastic portion 14B (elastic portion inclined surface 14F). The stopper receiving member 15 contacts the elastic portion 14B of the movable stopper member 14 to restrict the movement of the movable stopper member 14.

In the printing device 1 and the heading character stain prevention device 2 having the above-described configuration, in a normal printing selection state, as shown in FIGS. Is selected and rotated in any direction in the normal and reverse directions, the selection wheel 5 rotates the endless band 7 for printing, and the desired heading character 7B of the endless band 7 for printing enters the heading window portion 8.
Stop at a position visible from

In this selection state, the selected heading character 7
B, the print character 7A corresponding to the print character 7A is set on the print receiving base 6 at the ink roller facing opening 9 and is exposed.
, And printing can be performed by stamping the entire printing device 1 on a label by operating a hand lever (not shown), for example.

FIG. 3 is a cross-sectional view showing a state in which the printing endless band 7 is rotated in a clockwise direction in the drawing, in a rotation-blocking state. First, the operation shaft 4 is operated in a predetermined row to move the selection wheel 5. Even if the endless band for printing 7 is rotated in the clockwise direction, the high driving projection 7E of the endless band for printing 7 is
4 engages with the projection locking portion 14E (right side in the figure) of the elastic portion 14B.

Therefore, even if the selection wheel 5 is further rotated, the rotation of the selection wheel 5 is prevented and the printing blank portion is prevented because the high driving projection 7E and the projection locking portion 14E are engaged. 7C faces the heading window 8 and the opening 9 facing the ink roller, so that the heading 7B of the endless band 7 for printing is prevented from being located at the opening 9 facing the ink roller, and the heading 7B is prevented.
Can be prevented from being stained by the ink roller R.

FIG. 4 is a cross-sectional view showing the idle state of the selection wheel 5. When the selection wheel 5 is forcibly rotated further in the above-described rotation preventing state,
The outer peripheral engagement groove 5B of the selection wheel 5 is disengaged from the detent boss 14A of the movable stopper member 14 and rides on the same, as shown in the drawing. That is, the movable stopper member 14 is guided by the stopper guide portion 3B and moves downward in the drawing, and the guide long window 14C and the stopper guide portion 3B are moved.
A gap S2 on the lower side is generated, and the elastic portion inclined surface 14F slides on the upper surface of the receiving portion inclined surface 15A, so that the pair of left and right locking spring portions 14D of the elastic portion 14B spread outward, and the protrusion is formed. The engagement between the locking portion 14E and the high driving projection 7E of the printing endless band 7 is further strengthened.

In this state, the printing endless band 7 becomes slack between the upper printing blank portion 7C and the projection locking portion 14E, and the lower driving projection 7D is engaged with the outer periphery of the selection wheel 5. Selection wheel 5 which is out of groove 5B
Spins idle. In addition, the projection locking portion 1 is provided in front of the selection wheel 5 or the printing endless band 7 in the rotation direction.
4E and the high driving protrusion 7E are located, and the holding frame 3A holds down the printing endless band 7 to prevent it from spreading outward. Sufficient slack occurs between the endless band 7 and the selection wheel 5 to ensure the idle rotation of the selection wheel 5.

Therefore, even if an excessive external force is applied, the selection wheel 5 can be made to rotate freely. However, the rotation itself of the selection wheel 5 is applied to the moderation boss portion 14A of the movable stopper member 14 from the endless band 7 for printing. At the same time, since the movable stopper member 14 is harder than the endless band 7 for printing, it does not hinder the selection of printing due to its wear.

Here, when the selection wheel 5 is rotated in the opposite direction (counterclockwise), the outer peripheral engagement groove 5B and the moderation boss 1 are rotated.
4A is realized again, and the movable stopper member 14 returns to the original position shown in FIG. 1 by the elastic force of the movable stopper member 14.

FIG. 5 is a sectional view of a two-line printing type printer 20 equipped with a headline character stain preventing device according to a second embodiment of the present invention, and FIG. 6 is a sectional view taken along line VI-VI of FIG. The printing device 20 is a combination of printing devices 21 having substantially the same structure in two rows, and each heading character stain prevention device 22 in each printing device 21 is replaced with the heading character stain prevention device 2 (FIG. 1). The difference from the above is the structure of the printing endless band 7. Hereinafter, the same components as those of the printing device 1 are denoted by the same reference numerals, detailed description thereof will be omitted, and only the structure different from the printing device 1 will be described.

The first holding frame 23A and the second holding frame 23 of the printing unit frame 23 of the printing unit 20
B is formed substantially symmetrically to the left and right, and a guide plate 24 is provided at the center thereof, so that the movement of the endless band 7 for printing is smooth.

The rotary pin 11 moves and rotates integrally with the operation shaft 4. The rotary pin 11 passes through an axial slit 25 A (FIG. 6) of a sleeve 25 rotatably provided in the printer frame 3, and the inner periphery of the selection wheel 5 is rotated. Surface, and can be engaged with the inner peripheral engagement groove 5A of the selection wheel 5 in an arbitrary row.

The indicator 26 attached to the operation shaft 4 is the heading 7B of the indicator 10 described above.
In addition to the function to guide
That is, as shown in FIG. 6 in particular, the indicator 26 extending between the selection wheel 5 and the movable stopper member 14 forms a co-rotation preventing notch 26A that allows the rotation of only the selected selection wheel 5. I have. Therefore, the selection wheel 5 in the particular column determined
Only the rotatable one, and the rotation of the selection wheel 5 adjacent to the left and right, that is, the printing endless band 7 is prevented.

FIG. 7 is a side view of the printing endless band 7, in which two lower driving projections 7D formed on the inner peripheral surface of the printing endless band 7 are reduced by two compared to the case of the printing device 1 (FIG. 1). ing. That is, a low driving projection 7 is provided on the inner peripheral surface of the heading character 7B adjacent to the printing blank portion 7C in the rotation direction front of the printing endless band 7.
The flat portion 7F is formed without forming D. This flat part 7
In the illustrated example, the number of F is a pair (two) on the inner peripheral surface of the printing endless band 7. However, if the rotation of the printing endless band 7 by the selection wheel 5 is possible, the flat portion 7F on the inner peripheral surface of the printing endless band 7 so that two of them are adjacent to each other.
It is possible to make it easier to generate idle rotation.

The two-line printing type printing device 2 having such a configuration
8, the heading character dirt prevention device 22 operates in the same manner as the heading character dirt prevention device 2 described above, so that the ink of the heading character 7B can be printed without damaging the printing endless band 7. Dirt due to the roller R can be reliably prevented. That is, when the selection wheel 5 is rotated in the counterclockwise direction in the printing unit 21 on the left side of FIG. 8, the high driving projection 7E of the printing endless band 7 is engaged with the projection locking portion 14E of the movable stopper member 14. Is engaged to prevent further rotation of the selection wheel 5 (rotation prevention state).

Thus, when the selection wheel 5 is rotated clockwise in the right printing unit 21 in FIG. 8 to further rotate clockwise from the rotation inhibition state,
The selection wheel 5 rides on the moderation boss portion 14A, and the outer peripheral surface in the rotation direction of the selection wheel 5 and the inner peripheral surface of the endless band 7 for printing including the flat portion 7F (driving protruding portion) are separated from each other and idle. State. That is, as is clear from the drawing, the printing endless band 7 shows a slack state with respect to the selection wheel 5 and spins idle. Specifically, the print blank portion 7C located in the heading window portion 8
Since the inner peripheral surface of the heading character 7B on the right side of the figure does not have a low driving projection 7D but has a flat portion 7F, the engagement between the selection wheel 5 and the printing endless band 7 is easily released, and The endless band 7 is apt to be slackened, and can easily shift to the idle state. The other operations are the same as those of the headline character stain prevention device 2 according to the first embodiment, and thus the detailed description is omitted.

In the heading character dirt prevention device 2 according to the first embodiment shown in FIGS. 1 to 4, similarly to the heading character dirt prevention device 22 according to the above-described second embodiment, the printing device can be used. The endless band 7 can be configured to easily generate slack, and the selection wheel 5 can easily shift to the idle rotation state. When the diameter of the selection wheel 5 of the headline dirt prevention device 2 according to the first embodiment is smaller than that of the selection wheel according to the second embodiment, the position corresponding to the flat portion 7F is lower. By setting the height of the projecting portion 7D within a predetermined range, the printing endless band 7 may be easily slackened, and the selection wheel 5 may easily shift to the idle state. Furthermore, this selection wheel 5
In the case where the diameter is larger than that of the second embodiment (FIG. 5), the flat portion 7F formed on the inner peripheral surface of the endless band 7 for printing is equivalent to two characters left and right with respect to the printing blank portion 7C. It easily turns idle.

[0055]

As described above, according to the present invention, a movable stopper member having a detent boss portion and an elastic portion, and a stopper receiving member for contacting the elastic portion and restricting the movement of the movable stopper member are provided. As a result, it is possible to prevent the endless band for printing from being stained by the ink roller and to reduce the load on the endless band for printing 7. Furthermore, when the further rotation is to be performed from the rotation preventing state of the selection wheel, the outer peripheral surface in the rotation direction of the selection wheel and the inner peripheral surface of the endless band for printing are separated from each other, so that they rotate idle, so that both surfaces are rotated. No load due to contact resistance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a printing device 1 equipped with an apparatus 2 for preventing heading character contamination in a printing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 shows an endless band 7 for printing in the clockwise direction in FIG.
FIG. 6 is a cross-sectional view showing a rotation-blocking state when the is rotated.

FIG. 4 is a cross-sectional view showing the idle state of the selection wheel 5.

FIG. 5 is a cross-sectional view of a two-line printing type printing device 20 equipped with a heading character stain prevention device 22 in the printing device according to the second embodiment of the present invention.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a side view of the printing endless band 7;

FIG. 8 is a cross-sectional view showing a rotation preventing state when the printing endless band 7 is rotated counterclockwise and a spinning state when the printing endless band 7 is rotated clockwise.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printer (FIG. 1) 2 Heading character stain prevention device (1st Embodiment, FIG. 1) 3 Printer frame 3A Pressing frame of printer frame 3B Stopper guide part of printer frame 3 4 Print selection Operating shaft 4A Indexing groove of operating shaft 4 5 Selection wheel 5A Inner circumference engagement groove of selection wheel 5 5B Outer engagement groove of selection wheel 5 6 Print receiving base 7 Endless band for printing 7A Endless band for printing 7 Printing character 7B Heading character of printing endless band 7 7C Printing blank part of printing endless band 7 7D Low driving projection of printing endless band 7 7E High driving projection of printing endless band 7 7F Printing endless band 7 Flat portion (FIG. 7) 8 Heading window 9 Ink roller facing opening 10 Indicator 10A in Indicator 11 of rotary indicator 12 Rotary pin 12 Indexing steel ball 13 Indexing spring 14 Movable stopper member 14A Moderation boss portion of movable stopper member 14B Elastic portion of movable stopper member 14C Long guide window of movable stopper member 14D Elasticity Bifurcated locking spring portion 14E of portion 14B 14E Projection locking portion of elastic portion 14B Elastic portion inclined surface of elastic portion 14B 15 Stopper receiving member 15A Receiving portion inclined surface of stopper receiving member 15 20 Double-row printing type printing device (FIG. 5) 21 Printer 22 Heading character stain prevention device in printer 21 (second embodiment, FIG. 5) 23 Printer frame 23A First holding frame of printer frame 23B First frame of printer frame 23 2 holding frame 24 guide plate 25 sleeve 2 A Axial slit of sleeve 25 26 Indicator 26A Notch for co-rotation of indicator 26 R Ink roller S1 Upper gap between guide long window 14C and stopper guide 3B S2 Long window 14C for guide and stopper guide Lower gap between part 3B

Claims (6)

[Claims] An endless band for printing is provided between a selection wheel and a print receiving portion and has printed characters and heading characters formed thereon, and any of the printed characters of the endless band for printing can be selected. A headline character stain prevention device for a printing device, comprising: a detent boss portion that engages with the selection wheel, and an elastic portion on the printing tray portion side, between the selection wheel and the printing tray portion. A movable stopper member that is located; a stopper receiving member that contacts the elastic portion of the movable stopper member to restrict the movement of the movable stopper member; and a movable stopper member that is located on an inner peripheral surface of the printing endless band. And a driving projection that can be engaged with the elastic portion. An apparatus according to claim 1, wherein said movable stopper member is movable by engaging said driving projection with said elastic portion. 2. The apparatus according to claim 1, further comprising a stopper guide portion for guiding the movable stopper member in a movable direction thereof. 3. An apparatus according to claim 1, wherein said elastic portion has a bifurcated locking spring portion. 4. The apparatus according to claim 1, wherein the stopper receiving member has a receiving portion inclined surface for receiving the elastic portion. 5. The endless band for printing has a printing blank portion on the outer peripheral surface thereof, and the inner peripheral surface of the heading character adjacent to the printing blank portion on the rotation direction side has a flat portion. 2. A device for preventing headline characters from being stained in a printer according to claim 1, wherein: 6. A printing endless band provided between a selection wheel and a print receiving portion and formed with printing characters and a heading character, and any of the printing characters of the printing endless band can be selected. A headline character stain prevention device for a printing device, comprising: a stopper member located between the selection wheel and the print receiving base portion; and a stopper member located on an inner peripheral surface of the endless band for printing and engaging with the stopper member. And a driving projection that is capable of being provided. By the engagement of the driving projection and the stopper member accompanying the movement of the printing endless band, the printing endless band is slackened to cause the selection wheel. -An apparatus for preventing heading characters from being stained in a printing device, wherein the device rotates the file idle.