JP3466389B2 - Endless band tension adjustment device for printing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensioning and adjusting device for a printing endless band, and more particularly, to a tensioning endless band for printing in a printer mounted on a portable label printing and affixing device (handler labeler) or the like. It relates to an adjusting device.

[0002]

2. Description of the Related Art In conventional handlers and bellows,
Form the printing characters and heading characters on the printing endless band, and rotate this to make the desired printing characters printable.Apply ink to the printing characters with an ink roller etc. and imprint it on the label etc. ing.

The printing endless band is stretched between the selection wheel and the printing tray so as to be stretched with a predetermined tension. On the other hand, when this tension is not within the predetermined range due to an error in assembling various parts, it is necessary to adjust the tension degree in order to ensure proper feeding (rotation) of the printing endless band.

Further, if the printing endless band is made rotatable in an arbitrary rotation range, ink may be applied even up to the index character facing the ink roller, and the ink may become dirty.

As such a device for preventing stains on the index characters (ink application avoiding means), for example, Japanese Patent Application Laid-Open No. 6-1558.
In the "printing device" by No. 78, a convex portion is formed on the outer peripheral surface side of the printing endless band so that it can be locked by a stopper and an inclined surface is formed on the inner peripheral surface side, and the printing endless band is restricted. If you try to force it to reach the position, it will slip. However, in this device, there is a problem in that the inclined surface of the printing endless band is damaged by abrasion or cracking due to slip when the printing endless band is rotated with an excessive force. That is, if the tension of the printing endless band can be adjusted, the problem of this damage can be reduced.
No such tensioning adjustment device is disclosed.

In any case, when an attempt is made to limit the rotation of the printing endless band in a predetermined area in order to prevent the heading characters from being soiled, a large external force directly or indirectly acts on the printing endless band. Is difficult to avoid and its damage or elongation problems,
Further, there is a problem that the projecting member has passed over the stopper and the intended purpose cannot be achieved.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the printing endless can adjust the tension (extension degree) of the printing endless band within an arbitrary range. An object of the present invention is to provide a band tension adjusting device.

Further, according to the present invention, the tension adjusting device for a printing endless band is adapted to obtain an appropriate tension in idle operation of the printing endless band by adjusting the tension degree of the printing endless band. The challenge is to provide.

It is another object of the present invention to provide a tension adjusting device for a printing endless band capable of adjusting the tension of the printer when the printer is shipped from the factory.

[0010]

That is, according to the present invention, the tension degree can be adjusted from the inner peripheral side of the printing endless band, and a cam member (for example, an elliptical cross-section having a cross section of an elliptical shape) that can abut the printing endless band. Focusing on the fact that the tension can be adjusted by rotating the adjuster), it is provided between the selection wheel and the print pedestal part in the printer frame and at the same time the print character and the heading character are formed to make it A tension adjusting device for a printing endless band capable of selecting a printing character, comprising a cam member which is rotatable on the inner peripheral side of the printing endless band so as to come into contact with and separate from the inner peripheral surface of the printing endless band. The tension adjusting device for a printing endless band is characterized in that the rotational position of the cam member can be adjusted at any position.

The cam member may have an adjusting arm perpendicular to the cam adjusting rotation axis.

The printer frame may be provided with an adjusting groove portion capable of adjusting the rotational position of the cam member.

As the cam member, a member (adjuster) having an elliptical cross section can be used.

In the tension adjusting device for the printing endless band according to the present invention, the cam member is positioned on the inner peripheral side of the printing endless band, and the cam member is rotated to move the cam member and the printing endless band. The tension of the printing endless band can be adjusted by changing the degree of contact. Therefore, the tension degree of the printing endless band can be adjusted with a very simple structure and operation.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a tension adjusting device for a printing endless band according to an embodiment of the present invention will be described with reference to FIGS. 1 is a sectional view of a printer 1 and a tension adjusting device 2 for a printing endless band equipped in the printer 1, and FIG. 2 is a sectional view taken along line II-II of FIG. , A tension adjustment device 2 for a printing endless band, a printer frame 3, and an operating shaft 4 for printing selection
, A plurality of rows of selection wheels 5, a print receiving tray portion 6, and a plurality of rows of printing endless bands 7.

The printer frame 3 has a heading window portion 8 formed in the upper portion thereof and an ink roller facing opening portion 9 formed in the lower portion thereof. A press frame 3A is formed on the printer frame 3. At the opening 9 facing the ink roller, the ink roller R rolls so as to come into contact with the printing endless band 7.

The operating shaft 4 selects (indexes) the printing endless band 7 in an arbitrary row by moving the operating shaft 4 in the axial direction, and by rotating the selection wheel 5 in the indexed row, the printing endless band 7 is selected. This is for selecting a specific print character in the band 7. The indicator 10 is attached and the rotary pin 1
1 is formed to project (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 that urges the indexing groove 4A in the direction of the indexing groove 4A.

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

The rotary pin portion 11 moves and rotates integrally with the operating shaft 4, projects 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 for printing 7 is stretched between the selection wheel 5 and the printing tray base 6 with a predetermined tension. The printing endless band 7 has a predetermined number of printing characters 7A and heading characters 7B formed on its outer peripheral surface in respective regions.
However, the print blank portions 7C are formed in the respective boundary areas, and as described later, when the rotation of the selection wheel 5 is stopped to prevent the movement of the printing endless band 7, the print blank portions 7C are formed. 7C faces the index window 8 and the ink roller facing opening 9.

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

As for the number of high driving projections 7E, if the left and right sides of the inner peripheral surface of the printing endless band 7 are symmetrical, the number of the printing characters 7A and the heading characters 7B will be the same. It can be arbitrarily set over a predetermined region of the peripheral surface.

The low drive protrusion 7D and the high drive protrusion 7E engage with the outer peripheral engagement groove 5B of the selection wheel 5, and the rotation of the selection wheel 5 causes an arbitrary printed character 7A.
Can contact the ink roller R at the ink roller facing opening 9.

However, the headline character 7B does not come into contact with the ink roller R. That is, particularly as shown in FIG. 1, 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 tray portion 6, and a pair of moderation boss portions 14 that engage with the selection wheel 5 are provided.
A and an elastic portion 14B on the side of the print receiving tray portion 6 are included.

Further, in the movable stopper member 14, the moderation boss portion 14A can 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 in the central portion of the movable stopper member 14, and the stopper guide portion 3B is formed to project on the printer frame 3.
The guide long window 14C is fitted therein. In the normal selectable state, there is an upper gap S1 between the long guide window 14C and the stopper guide portion 3B, which allows the movable stopper member 14 to move downward and return in the drawing. .

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

The stopper receiving member 15 is located between the movable stopper member 14 and the print receiving tray portion 6 and has a receiving portion inclined surface 15A that abuts 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 regulate the movement of the movable stopper member 14.

Tension adjustment device 2 for printing endless band
Has an adjuster 16 (cam member). Figure 3
It is a side view of the adjuster 16,
Is an elliptical body 16A in cross section and a cam adjusting rotary shaft 16B.
The adjusting arm 16C and the engaging protrusion 16D are integrally formed.

The body portion 16A having an elliptical cross section can be brought into contact with and separated from the inner peripheral surface of the printing endless band 7 on the inner peripheral side of the printing endless band 7. Cam adjustment rotation shaft 16B
This allows the body part 16A having an elliptical cross section to rotate, and rotatably supports it on the printer frame 3. The adjustment arm 16C is perpendicular to the cam adjustment rotation shaft 16B and has an engagement protrusion 16D at its tip.

FIG. 4 is an enlarged side view of the printer frame 3 and the adjuster 16 partly cut away, showing the printer frame 3 in a plane perpendicular to the paper surface of FIG. 4 (see FIG. 1).
In the above, the cam adjusting groove portions 3C with which the engaging projections 16D can be engaged are formed in an arc shape and at equal angular intervals so that the turning angle of the adjuster 16 can be adjusted.

In the printer 1 and the tension adjusting device 2 for a printing endless band having such a configuration, in the normal printing selection state, as shown in FIGS. 1 and 2, the operation shaft 4 is moved in the axial direction thereof. When an arbitrary row is indexed by, and this row is rotated in forward and backward arbitrary directions, the selection wheel 5 rotates the printing endless band 7, and a desired heading character 7 of the printing endless band 7 is obtained.
Stop at a position where B can be seen from the heading window portion 8.

In this selected state, the selected headline character 7
A print character 7A corresponding to B is set and exposed on the print receiving tray portion 6 at the opening 9 facing the ink roller, and the print character 7A is rolled by the rolling of the ink roller R.
It is possible to print by applying ink to the label and imprinting the entire printer 1 on a label by operating a hand lever (not shown) or the like.

FIG. 5 is a sectional view showing a state in which the printing endless band 7 is prevented from rotating when the printing endless band 7 is rotated clockwise in the figure. First, the operating shaft 4 is operated in a predetermined row to move the selection wheel 5 to the selected wheel 5. Even if the printing endless band 7 is rotated clockwise to rotate the printing endless band 7, the high driving projection 7E of the printing endless band 7 is movable.
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, since the high drive projection 7E and the projection locking portion 14E are engaged with each other, the rotation of the selection wheel 5 is prevented and the print blank portion is prevented. 7C is exposed to the heading window 8 and the ink roller facing opening 9, and the heading character 7B of the printing endless band 7 is prevented from being located in the ink roller facing opening 9 to prevent the heading character 7B.
Can be prevented from being soiled by the ink roller R.

FIG. 6 is a cross-sectional view showing the idle state of the selection wheel 5. When the selection wheel 5 is forcibly rotated any further in the above rotation-prevented state,
The outer peripheral engagement groove 5B of the selection wheel 5 is disengaged from the moderation boss portion 14A of the movable stopper member 14 and rides on the moderation boss portion 14A, resulting in the state shown in the drawing. That is, the movable stopper member 14 is guided by the stopper guide portion 3B and moves downward in the figure, and the long guide window 14C and the stopper guide portion 3B are moved.
And a lower gap S2 is formed between the elastic part 14B and the elastic part inclined surface 14F slides on the upper surface of the receiving part inclined surface 15A, so that the pair of left and right locking spring parts 14D of the elastic part 14B spreads outwards. 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, slack occurs in the printing endless band 7 between the upper printing blank portion 7C and the projection locking portion 14E, and the low driving projection 7D engages with the outer periphery of the selection wheel 5. Select wheel 5 out of groove 5B
Will fly around. 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 thereof.
Since the engaging portion between 4E and the high drive projection 7E is located, and the pressing frame 3A suppresses the printing endless band 7 to prevent it from spreading outward, the selection wheel 5 and the printing wheel 5 are printed. Sufficient slack is generated between the endless band 7 for use and the idle rotation of the selection wheel 5 can be ensured.

Therefore, even if an excessive external force is applied, the selection wheel 5 can be idled, but the rotation itself of the selection wheel 5 is applied to the moderation boss portion 14A of the movable stopper member 14 by the printing endless band 7. At the same time, since the movable stopper member 14 is harder than the printing endless band 7, the wear does not hinder the printing selection.

Here, if the selection wheel 5 is rotated in the opposite direction (counterclockwise), the outer peripheral engagement groove 5B and the moderation boss portion 1 are rotated.
4A is re-engaged, and the elastic force of the movable stopper member 14 causes the movable stopper member 14 to return to the original position shown in FIG.

On the other hand, in the tension adjusting device 2 for the printing endless band, for example, in the assembling process of the printer 1 in a factory, the main body portion 16A having an elliptical cross section is rotated about the cam adjusting rotation shaft 16B for adjustment. By engaging the engagement protrusion 16D of the arm 16C with an arbitrary position of the cam adjustment groove portion 3C of the printer frame 3, it is possible to adjust the posture or relative position of the main body portion 16A having an elliptical cross section with respect to the printing endless band 7. .

For example, as shown in FIG. 1, if the elliptical main body portion 16A is positioned so as to be stretched in the printing endless band 7, the elliptical main body portion 16A becomes the inner peripheral surface of the printing endless band 7. Since the contact is relatively strong, the tension of the printing endless band 7 can be increased.

Alternatively, when the main body portion 16A having an elliptical cross section is rotated in the posture as shown in FIGS. 5 to 6, the adjuster 16 does not contact the inner peripheral surface of the printing endless band 7 and the printing endless band 7 is formed. The tension of can be reduced.

Thus, by adjusting the turning angle of the adjuster 16, it is possible to adjust the tension of the printing endless band 7 to ensure its proper rotation, and in the idle state as shown in FIG. It is possible to set the degree of slack of the printing endless band 7 and the idle action of the selection wheel 5 related to the degree of slack within a desired degree.

Incidentally, the tension of the printing endless band 7 is readjusted by adjusting the set angle position of the adjuster 16 according to the situation of expansion or slack of the printing endless band 7 due to the use of the printer 1. be able to.

[0045]

As described above, according to the present invention, the tension degree of the printing endless band can be adjusted by providing a cam member such as an adjuster and rotating the cam member within a predetermined range.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a printer 1 equipped with a tension adjusting device 2 for a printing endless band according to an embodiment of the present invention.

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

FIG. 3 is a side view of the adjuster 16.

FIG. 4 is a printer frame 3 and an adjuster 16 of the same.
FIG. 3 is an enlarged side view of a partly cutaway main part.

FIG. 5 is a sectional view showing a rotation blocking state when the printing endless band 7 is rotated clockwise.

FIG. 6 is a sectional view showing an idle state of the selection wheel 5.

[Explanation of symbols]

1 Printer (FIG. 1) 2 Tension adjustment device for printing endless band (embodiment, FIG. 1) 3 Printer frame 3A Press frame 3B of printer frame 3 Stopper guide part 3C of printer frame 3 Printer frame 3 Cam adjusting groove 4 Operation shaft 4A for printing selection Indexing groove 5 of operation shaft 5 Selection wheel 5A Inner circumference engagement groove 5B of selection wheel 5 Outer circumference engagement groove 6 of selection wheel 5 Print receiving base 7 Printing Endless band 7A Printing endless band 7 printing characters 7B Printing endless band 7 heading character 7C Printing endless band 7 printing blank part 7D Printing endless band 7 low drive protrusion 7E Printing endless band 7 High drive projection 8 Heading window 9 Ink roller facing opening 10 Indicator 10A Indicator 10 Indicator part 11 Rotary pin 12 Indexing steel ball 13 Indexing spring 14 Movable stopper member 14A Moderation boss part 14B of the movable stopper member 14 Elastic part 14C of the movable stopper member 14 Long window 14D for guide of the movable stopper member 14 Elastic part 14B Bifurcated locking spring portion 14E Protrusion locking portion 14F of elastic portion 14B Elastic portion inclined surface 15 of elastic portion 14B Stopper receiving member 15A Receptor inclined surface 16 of stopper receiving member 15 Adjuster (cam member) 16A Cross section of adjuster 16 Oval body 16B Cam adjustment rotary shaft 16C of the adjuster 16 Adjustment arm 16D of the adjuster 16 Engagement protrusion R of the adjuster 16 Ink roller S1 For guide The upper gap S2 between the elongated window 14C and the stopper guide 3B For guide 14C and long window Lower gap between the Ppagaido portion 3B

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Claims (3)

(57) [Claims] 1. A tension adjusting device for an endless band for printing, which is provided between a selection wheel and a print receiving base portion in a printer frame and forms a print character and a heading character so that any of the print characters can be selected. A cam member is provided on the inner peripheral side of the printing endless band so as to be capable of rotating toward and away from the inner peripheral surface of the printing endless band, and the rotational position of the cam member can be adjusted at any position. An endless band tension adjusting device for printing, which is characterized in that 2. The cam member has an adjusting arm that is perpendicular to a cam adjusting rotation axis of the cam member.
The tension adjustment device for the endless band for printing described. 3. The tension adjusting device for a printing endless band according to claim 1, wherein the printer frame is provided with an adjusting groove portion capable of adjusting a rotational position of the cam member.