JPH1044574A - Endless band tension adjustment device for printing - Google Patents

Abstract

(57) [Problem] To adjust the tension (degree of tension) of the printing endless band 7 within an arbitrary range to obtain an appropriate tension in the idle rotation operation of the printing endless band 7. To provide a printing endless band stretching adjusting device capable of adjusting the degree of stretching of a printing device at the time of factory shipment. SOLUTION: The degree of tension can be adjusted from the inner peripheral side of the printing endless band 7, and a cam member (for example, an adjuster 16 having an elliptical cross section) that can contact the printing endless band 7 is rotated. The cam member 16 is provided on the inner peripheral side of the printing endless band 7 so as to be rotatable so as to be able to contact and separate from the inner peripheral surface of the printing endless band 7.
6 is characterized in that the turning position can be adjusted at an arbitrary position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing endless band tension adjusting device, and more particularly to a printing endless band stretching device for use in a printer attached to a portable label printing and pasting device (handler labeler). The present invention relates to an adjusting device.

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

If the printing endless band is rotatable to an arbitrary rotation range, ink may be applied to the heading characters in opposition to the ink roller, and the ink may be stained.

[0005] Such a device for preventing heading characters from being stained (ink application avoiding means) is disclosed in, for example, JP-A-6-1558.
No. 78 “Printing device” has a protruding portion formed on the outer peripheral surface of the endless band for printing so that it can be locked to the stopper, and an inclined surface is formed on the inner peripheral surface to limit the endless band for printing. If you try to force it to rotate when it reaches the position, it will 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. That is, if the degree of stretching of the endless band for printing can be adjusted, it is possible to reduce the problem of this damage,
Such a tension adjusting device is not disclosed.

In any case, when the rotation of the printing endless band is to be restricted in a predetermined area in order to prevent heading characters from being stained, an external force acts directly or indirectly on the printing endless band. Is difficult to avoid, its damage or stretch problems,
Further, there is a problem that the intended purpose cannot be achieved because the projection member gets over the stopper.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above-described problems. It is an object of the present invention to adjust the tension (degree of tension) of an endless band for printing within an arbitrary range. An object of the present invention is to provide a band tension adjusting device.

The present invention also provides a tension adjusting device for a printing endless band in which the tension of the printing endless band is adjusted by adjusting the degree of tensioning of the printing endless band. The task is to provide

Another object of the present invention is to provide a printing endless band tension adjusting device capable of adjusting the degree of tension of a printing device at the time of factory shipment.

[0010]

That is, the present invention is to provide an endless band for printing, which is capable of adjusting the degree of tension from the inner peripheral side, and a cam member (for example, having an elliptical cross section) which can abut the endless band for printing. It is focused on the fact that the tension can be adjusted by rotating the adjuster). It is provided between the selection wheel and the print receiving base in the printer frame, and print characters and index characters are formed. A printing endless band tension adjusting device 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 be able to contact and separate from the inner peripheral surface of the printing endless band. A printing endless band tension adjusting device, wherein a rotation position of the cam member can be adjusted at an arbitrary position.

[0011] The cam member may have an adjustment arm perpendicular to the cam adjustment rotation axis.

[0012] The printing device frame may be formed with an adjusting groove for adjusting the rotational position of the cam member.

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

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

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a tension adjusting device for an endless band for printing according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a printing device 1 and a tension adjusting device 2 for a printing endless band provided in the printing device 1, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. A printing endless band tension adjusting device 2, a printing device frame 3, and an operation shaft 4 for selecting printing.
, A plurality of rows of selection wheels 5, a printing tray 6, and a plurality of rows of printing endless bands 7.

The printer frame 3 has a heading window 8 formed at an upper portion thereof and an ink roller facing opening 9 formed at a lower portion thereof. 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 (indexes) a printing endless band 7 in an arbitrary row by moving the operating axis 4 in the axial direction, and rotates the selecting wheel 5 in the indexed row to thereby rotate the printing endless band. 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, and has a pointer 10A protrudingly formed in the index window 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, a printing endless band 7 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. Possible low drive projection 7
D, and a high driving projection 7E are formed.

If the number of high driving projections 7E is left and right on the inner peripheral surface of the printing endless band 7, the number of the printing endless bands 7 in accordance with the number of printing characters 7A and heading characters 7B, etc. 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 any print character 7A.
Can be brought into contact with the ink roller R at the ink roller facing opening 9.

However, the index character 7B does not contact the 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 located between the selection wheel 5 and the print receiving table 6 and has a pair of detent bosses 14 which engage 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.

Endless band tension adjusting device 2 for printing
Has an adjuster 16 (cam member). FIG.
FIG. 6 is a side view of the adjuster 16, wherein the adjuster 16
Are a main body 16A having an elliptical cross section and a cam adjustment rotation shaft 16B.
And the adjustment arm 16C and the engagement projection 16D are integrally formed.

The main body portion 16A having an elliptical cross section can be brought into contact with and separated from the inner peripheral surface of the endless band 7 for printing on the inner peripheral side of the endless band 7 for printing. Cam adjustment rotation shaft 16B
The rotatable main body portion 16A is rotatably supported by 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 an essential part of the printer frame 3 and the adjuster 16 with a partial cutout. The printer frame 3 is provided in a plane perpendicular to the plane of FIG.
The cam adjusting grooves 3C with which the engaging protrusions 16D can engage are formed in an arc shape and at equal angular intervals (in a plane parallel to the paper surface) so that the rotation angle of the adjuster 16 can be adjusted.

In the printing device 1 and the endless band tension adjusting device 2 having such a configuration, in the normal printing selection state, the operating shaft 4 is moved in the axial direction as shown in FIGS. , An arbitrary column is calculated, and the column is rotated in an arbitrary direction in the normal or reverse direction. The selection wheel 5 rotates the endless band 7 for printing, and the desired heading character 7 of the endless band 7 for printing.
It stops at the position where B can be seen from the entry window 8.

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. 5 is a cross-sectional view showing a state in which the printing endless band 7 is rotated in the clockwise direction in FIG. 5 when rotation is prevented. First, the operating shaft 4 is operated in a predetermined row to change 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 to be further rotated, the rotation of the selection wheel 5 is prevented because the high driving projection 7E and the projection locking portion 14E are engaged, and the printing blank portion is not rotated. 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. 6 is a cross-sectional view showing the idle state of the selection wheel 5. In the above-described rotation preventing state, if the selection wheel 5 is forcibly rotated any further,
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, slack occurs in the printing endless band 7 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 portion 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.

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

For example, as shown in FIG. 1, if the elliptical cross-section main body 16A is positioned so as to protrude within the printing endless band 7, the elliptical cross-section main body 16A is in contact with 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 16A is rotated in the posture shown in FIGS. 5 and 6, the adjuster 16 does not come into contact with the inner peripheral surface of the endless band 7 for printing. Can be reduced.

Thus, by adjusting the rotation angle of the adjuster 16, it is possible to adjust the tension of the printing endless band 7 to ensure proper rotation thereof, and to ensure that the printing endless band 7 rotates in the idle state as shown in FIG. The slackness of the endless band for printing 7 and the idle rotation of the selection wheel 5 related to the slackness can be kept within a desired range.

The tension of the printing endless band 7 is readjusted by adjusting the set angle position of the adjuster 16 in accordance with the state of extension or slack of the printing endless band 7 due to the use of the printing unit 1. be able to.

[0045]

As described above, according to the present invention, the degree of extension 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 the drawings]

FIG. 1 is a cross-sectional view of a printing device 1 equipped with a printing endless band tension adjusting device 2 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 shows a printer frame 3 and an adjuster 16 of the same.
It is a partially cut-away main part enlarged side view of a part.

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

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

[Explanation of symbols]

REFERENCE SIGNS LIST 1 printer (FIG. 1) 2 printing endless band tension adjusting device (embodiment, FIG. 1) 3 printer frame 3A holding frame of printer frame 3B stopper guide portion of printer frame 3 3C printer frame 3 cam adjustment groove 4 printing operation shaft 4A indexing groove of operation shaft 4 selection wheel 5A inner circumference engagement groove of selection wheel 5B outer circumference engagement groove of selection wheel 5 6 print receiving base 7 printing Endless band for printing 7A Printing character of printing endless band 7 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 Printing endless band 7 High driving projection 8 Heading window 9 Ink roller facing opening 10 Indicator 10A Pointer 11 of caterer 11 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 part 14E of part 14B Projection locking part 14E of elastic part 14B Elastic part inclined surface of elastic part 14B 15 Stopper receiving member 15A Receiving part inclined surface of stopper receiving member 15 16 Adjuster (cam member) 16A Adjuster 16 Cross-sectional elliptical main body 16B Cam adjustment rotation axis of adjuster 16C Adjustment arm of adjuster 16D Engagement projection of adjuster 16 R Ink roller S1 Upper gap between guide long window 14C and stopper guide 3B S Lower gap between the elongated guide windows 14C and the stopper guide portion 3B

Claims (3)

[Claims] 1. A printing endless band tension adjusting device which is provided between a selection wheel and a print receiving portion in a printer frame and forms print characters and index characters so that any of the print characters can be selected. A cam member is provided on the inner peripheral side of the endless band for printing, the cam member being rotatable so as to be able to contact and separate from the inner peripheral surface of the endless band for printing, and the rotational position of the cam member can be adjusted at an arbitrary position. An endless band tension adjusting device for printing. 2. The cam member according to claim 1, wherein the cam member has an adjustment arm perpendicular to the cam adjustment rotation axis.
The tension adjusting device for the endless band for printing described in the above. 3. The tension adjusting device for an endless band for printing according to claim 1, wherein an adjustment groove for adjusting a rotational position of the cam member is formed in the printing device frame.