JPH03212336A - Label printer - Google Patents

Abstract

PURPOSE:To peel off labels well from a board and increase a printing accuracy, by providing a peeling roller which peels off labels from the board, guiding the board to bend it and a pressing means which pushes the peeling roller toward the board side. CONSTITUTION:A peeling roller 13 is supported at the position where the energizing force of plate springs 17a, 17b balances with the tensile strength of the board 21 and hence, the board 21 is sufficiently bent. When a printing head 5 prints as specified on the label 19 on the outer peripheral face of a platen 3, the driving shaft 29 of a pultractor 7 rotates, synchronizing with the revolution of the platen 3. In this way, the belts 39a, 39b of tractors 7a, 7b rotate and the board 21 is drawn from the platen 3 side through the fitted protrusions 41a, 41b and contacts the peeling roller 13 at the side where the labels are not attached and the board is extremely bent and guided. Due to this bending, the printed label 19 is peeled off from the board 21, that is, when the board 21 is bent greatly by the peeling roller 13, the label 19 is peeled off from the board 21 by the restoring force of the label 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a label printing device that prints on a label that is releasably attached to a mount.

[Prior Art] Conventionally, a label printing device for printing on a label removably attached to a mount is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-87275.

This label printing device is provided with a peeling roller and a guide roller between the platen and the tractor feeder that feeds the mount. The printed label is peeled off from the backing paper by bending and guiding the backing paper with each roller.

[Problems to be Solved by the Invention] However, in the case of high-speed printing in which the rotation speed of the tractor feeder increases, the impact force during rotation is directly applied to the sprocket hole of the mount via the fitting protrusion of the tractor feeder. As a result, the sprocket holes in the backing paper may enlarge, or the backing paper may become loose at the sprocket hole portion, as the predetermined tension is no longer applied to the backing paper being fed by the tractor feeder.

Furthermore, if the mount is not fed smoothly due to, for example, foreign matter adhering to the outer peripheral surface of the guide roller, the mount may become loose between the platen and the guide roller.

Therefore, due to the loosening of these mounts, the printed label may not be peeled off by the peeling roller, or the printed position of the label may be misaligned, and printing stains such as double striking may occur.

The present invention aims to solve the above-mentioned problems, and provides a label printing device that can improve the peeling of a label from a mount and improve printing accuracy.

[Means for Solving the Problems] In order to achieve the above object, in a label printing device of the present invention (a label printing device that prints on a label stuck to a backing paper), a label printing device of the present invention (a label printing device that prints on a label stuck to a backing paper) is provided with a mount feeding mechanism disposed; a peeling roller that comes into contact with the mount from the non-labeled side and peels off the label from the mount by bending and guiding the mount; and a peeling roller that is placed on the mount side. The device is characterized in that it has a biasing means for biasing.

[Function] In the label printing device of the present invention, the label attached to the backing paper in a peelable manner (printed by the print head on the front platen).
The non-labeled side of the mount is brought into contact with the peeling roller and is bent while being fed by the mount feeding mechanism. The peeling roller is supported in a state where it is urged toward the mount by the urging means.

Therefore, for example, when the backing paper feeding mechanism rises rapidly, the impact force applied to the backing paper will be alleviated by the peeling roller supported by the urging means, and the sprocket hole of the backing paper will expand.
No more tearing.

Furthermore, the movement of the peeling roller due to the displacement of the biasing means prevents the mount from loosening.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows a partially cutaway side view of a label printing device according to the present invention. In the figure, a print head 5 is disposed on a platen 3 rotatably supported by a platen shaft 1 with a predetermined gap from the outer peripheral surface of the platen 1 .

4- A pull tractor 7 as a paper feeding mechanism is provided on the downstream side of the platen 3 in the paper feed direction (direction of arrow A in the figure), and a bush tractor 9 is disposed on the upstream side. A mount holding mechanism 11 is provided. A peeling roller 1 is provided between the platen 3 and the pull tractor 7.
3 and guide rollers 15 are provided. The peeling roller 13 is supported in a biased state by leaf springs 17a and 17b, which are biasing means, in the direction of the arrow.

A long mount 21 on which a large number of labels 19 are pasted at predetermined intervals is inserted from the bushing tractor 9 side and is bent by the tag platen 3, peeling roller 13, and guide roller 15.
It is supplied to the pull tractor 7. This mount 21 has sprocket holes 23 bored at both left and right ends (see Figure 3).
is engaged with the pull tractor 7 by a method described later, and is sent in the direction of arrow A by the action of the pull trough.

As shown in FIG.
is peeled off from the mount 21.

A paper guide plate 25 is disposed below the platen 3. A plurality of paper press rollers 27 are rotatably supported on the paper guide plate 25. In addition, a pull tractor 7 (consisting of a pair of left and right tractors 7a and 7b) includes a drive shaft 29, a guide shaft 31, and a driven shaft 35 arranged in parallel to the platen shaft 1.
Supported by

The tractor 7a (L) has a drive pulley 33a fitted to the drive shaft 29 and a driven pulley 37a fitted to the driven shaft 35. A belt 39a is wound between the drive pulley 33a and the driven pulley 37a. A plurality of fitting protrusions 41a are provided on the outer peripheral surface of the belt 39a at the same intervals as the sprocket holes 23 of the mount 21.A plurality of fitting protrusions 41a are provided on the outer peripheral surface of the mount 21 at the same intervals. A paper holding cover (not shown) that prevents the paper from coming off is provided so that it can be opened and closed.

On the other hand, the tractor 7b is also configured similarly to the tractor 7a. These tractors 7a and 7b have a drive shaft 29,
The guide shaft 31 and the driven shaft 35 are arranged to be movable in the axial direction, and their set positions are adjusted according to the width of the mount 21. The upper drive shaft 29 is connected to the platen shaft 1 by a clutch mechanism (not shown) and rotates in synchronization with the platen shaft 1.

The peeling roller 13, which is disposed between the pull tractor 7 and the platen 3, is supported by a leaf spring 17a, as shown in FIG. That is, one end of the peeling roller 13 is inserted into a square hole 47a provided in the support plate 45a, and its tip is placed on the tip of a leaf spring 17a fixed to the support plate 45a. As a result, the peeling roller 13 is urged toward the mount 21 (in the direction of the arrow in FIG. 1) by the leaf spring 17a. Note that the same leaf spring 17b (not shown) is also provided on the other end of the peeling roller 3. Both leaf springs 17a, 1
The peeling roller 13 is supported by 7b.

On the other hand, the mount pressing mechanism 1 is constructed as shown in FIGS. 4 and 5. That is, a mount pressing mechanism 1111, a flat plate 49 against which the mount 21 is pressed, a pair of side plates 51a and 51b provided on both sides of this flat plate 49, a side plate 51a,
Spring mounting plates 53a and 53 provided at the rear upper part of 51b
It has b. This flat plate 49, side plates 51a, 5
1b and the spring mounting plates 53a and 53b are integrally formed of, for example, synthetic resin. Note that the width of the flat plate 49 is set according to the width of the mount 21 to be used.

Leaf springs 55a and 55b are fixed to the spring mounting plates 53a and 53b with a plurality of screws 57, respectively. These leaf springs 55a, 55b [i The bent portions 55a-1, 5
5b-1 is arranged so as to be in contact with the upper surface of the flat plate 49 with a predetermined pressure.

The side plates 51a and 51b are provided with cutouts 59 and 61 that open toward the front (in the direction of sheet feeding) and downward, respectively. Then, this notch 59 is loosely fitted from above onto a drive shaft 63 that drives a bushing tractor 9, which will be described later, and then the spring mounting plates 53a and 53b are rotated backward (in the two directions of arrows in FIG. 1). As a result, the notch 61 is loosely fitted onto the guide shaft 65. As a result, the mount holding mechanism 11 is disposed between the left and right tractors 9a and 9b of the bush tractor 9, as shown in FIG.

This mount holding mechanism 11 is connected to the paper supply port 67 (
1), the mount 21 placed on the flat plate 49 is pressed against the flat plate 49 with a predetermined pressing force by the plate springs 55a, 55b. As a result, a predetermined tension is applied to the mount 21 pulled by the pull tractor 7, and the mount 21 is pulled by the pull tractor 7.
Prevent loosening of item 1.

Note that, like the pull tractor 7, the bush tractor 91 is composed of a pair of left and right tractors 9a and 9b. That is, as shown in FIG. 4, the tractor 9a (consisting of a drive pulley 67a fitted to a companion drive shaft 63, a belt 71a protruding from a fitting protrusion 69a, etc.). 67b, and a belt 71b on which a fitting protrusion 69b is protruded.When printing on the label 19 on the mount 21, for example, on this bushing tractor 91, it is attached to the main body of the printer. The mount holding mechanism 11 will be disposed at.

8- Next, the operation until the printed label 19 is peeled off from the mount 21 will be explained based on FIG. 1.

First, the mount 21 is supplied to the pull tractor 7 through the supply port 67 of the apparatus main body, onto the flat plate 49 of the mount presser mechanism 11, the outer peripheral surface of the platen 3, the peeling roller 13, and the guide roller 15. This mount 21 is only placed on the flat plate 49 of the mount holding mechanism 11 and is not engaged with the bushing tractor 9.

Then, pull the mount 21 and insert the sprocket holes 23 at both left and right ends into the fitting protrusions 41a, 41 of the tractors 7a, 7b.
b, respectively. At this time, the mount 21 is pressed against the flat plate 49 by the plate springs 55a and 55b of the companion mount holding mechanism 11 with a predetermined pressing force (more than the above-mentioned pulling force), so it is not pulled out by tension.

Therefore, the peeling roller 13 receives a force in the convex direction of the arrow corresponding to the tension of the mount 2, and this force causes the leaf springs 17a, 17
b is pushed down in the convex direction of the arrow against the urging force. As a result, the peeling roller] 3 (the urging force of the plate springs 17a, 17b and the tension of the mount 2) are supported at a position where they are balanced,
The mount 21 will be sufficiently bent.

The label 1 is printed by the print head 5 on the outer peripheral surface of the platen 3.
When a predetermined print is performed on 9, the pull trough drive shaft 29 rotates in synchronization with the rotation of the platen 3. As a result, the belts 39a, 39b of the tractors 7a, 7b rotate, and the mount 21 is pulled out from the platen 3 side via the fitting protrusions 41a, 41b.

The backing paper 21 pulled out from the platen 3 side comes into contact with the peeling roller 13 on the non-labeled side and is guided while being bent greatly. By this bending by the peeling roller 13, the printed label 19 is peeled off from the mount 21. That is,
When the mount 21 is largely bent by the peeling roller 13, the restoring force of the label 19 causes the label 19 to be peeled off from the mount 21.

At this time, the peeling roller 13 sequentially peels off the label 19 from the fed backing paper 21 while buffering changes in the tension of the backing paper 21 by the action 1 of the plate springs 17a and 17b. Note that the movement of the mount 21 in the width direction is restricted by the left and right side plates 51a and 51b of the mount holding mechanism 11.

As described above, in the above embodiment, the peeling roller 13 is disposed between the platen 3 and the pull tractor 7, and the peeling roller 13 is supported at both ends by leaf springs 17a and 17b. Further, a mount holding mechanism 11 is disposed on the upstream side of the platen 3 in the mount paper feeding direction.

Therefore, if the rotation speed of the pull trough increases,
The impact force applied to the sprocket hole 23 of the mount 21 from the fitting protrusions 41a, 41b can be alleviated by the action of the plate springs 17a, 17b. This can prevent the sprocket hole 23 from expanding or the mount 21 from tearing at the sprocket hole 23 portion, and can prevent the mount 21 from loosening due to these causes.

Furthermore, for example, loosening of the mount 21 between the platen 3 and the guide rollers 2-15 (due to tension change) can be prevented by the peeling roller 13. That is, the plate spring 17 supporting the peeling roller 13 according to the slack of the mount 21
a and 17b are displaced, and the peeling roller 13 is moved upward (in the direction of the arrow) to prevent the mount 21 from loosening.

Therefore, since the backing paper 21 is prevented from loosening by the peeling roller 13, the backing paper 21 can be folded at a sufficient angle by the peeling roller 13, and the label 19 can be peeled from the backing paper 21 in a good manner. Misalignment of the label 19 due to loosening can be prevented, and printing accuracy can be improved.

Further, in the above embodiment, since the movement of the mount 21 in the width direction is restricted by the mount holding mechanism 11, the mount 21 does not move in the width direction during printing, and the label 19 can be moved to a predetermined position. Printing becomes possible.

Furthermore, in the above embodiment, in order to allow the mount 21 to pass over the flat plate 49 of the mount holding mechanism 1 without engaging the bushing tractor 9, the mount holding mechanism 11 is
If the drive shaft 63 and guide shaft 65 of the bush tractor 9 are supported by an appropriate support device (not shown), the bush tractor 9 and a clutch mechanism (not shown) for interlocking this tractor 9 with the platen shaft 1 can be used. ) etc., the configuration can be simplified and costs can be reduced.

FIGS. 6 and 7 show other examples of the mount holding mechanism. This mount holding mechanism includes two holding members 75a and 75b.
has. The holding member 75a[;j has a flat plate 77a and a side plate 79a, and a plate spring 81a is fixed to the upper surface (or inner surface) of the side plate 79a with screws 83 or the like. Further, the holding member 75b is configured symmetrically with the holding member 75a, which is made up of a flat plate 77b, a side plate 79b, a leaf spring 81b, and the like.

The side plate 79a of the holding member 75a is provided with notches 85 and 87 that open forward and downward.
．． 87 is loosely fitted to, for example, the drive shaft 63 and guide shaft 65 of the push+tractor 9 by the same method as the mount presser mechanism 11 of the above embodiment. Thereby, as shown in FIG. 6, the holding member 75a is disposed inside the tractor 9a.

Further, a presser member 75 configured similarly to the presser member 75a
b is also arranged inside the tractor 9b.

Even with this configuration, the mount 21 can be pressed against the flat plates 77a, 77b with a predetermined pressing force, and the mount 21 can be prevented from moving in the width direction by the side plates 79a, 79b, as in the above embodiment. I can do it. Further, since the holding members 75'a and 75b can be arranged corresponding to the left and right tractors 9a and 9b, they can be easily applied to various widths of the mount 21, and versatility can be improved. .

In the above embodiment, the leaf spring 1 is used as the biasing means.
7a and 17b are used to urge the peeling roller 13 from below, but the present invention is not limited to this embodiment in any way.

Example 1: Using a coil spring instead of a leaf spring,
Appropriate urging means may be employed, such as urging the peeling roller by supporting it from above.

15- Also, in the above embodiment, the mount pressing mechanism allows
Although a predetermined tension is applied to the mount, for example, by fitting the sprocket hole of the mount to the fitting protrusion of the bush tractor,
It may be configured to apply a predetermined tension to the mount.

[Effects of the Invention] As detailed above, according to the label printing device of the present invention, the peeling roller prevents the backing paper from loosening, so that the printed label can be peeled off from the backing paper in a good manner. This also prevents printing stains caused by label misalignment,
Printing accuracy can be improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a label printing device according to the present invention, FIG. 2 is an enlarged view of the main part, FIG. 3 is a perspective view of the main part, and FIG. IV sectional view, FIG. 5 is a perspective view of the mount holding mechanism, FIG. 6 is a sectional view similar to FIG. 4 showing another example of the mount holding mechanism, and FIG. 7 is the same perspective view. 3...Platen, 5...Print head, 6- 7...Pull tractor, 9...Button puller,]1...Paper presser mechanism,]3...Peeling rope 17
a, 17b... Itaba-sama 19... Label, 21... Mount.

Claims (1)

[Scope of Claims] 1. A label printing device that prints on a label affixed to a mount, comprising: a mount feeding mechanism disposed downstream of the printing position in the mount feeding direction; and a side of the mount to which the label is not attached. A peeling roller that comes into close contact with the label and peels the label from the mount by bending and guiding the mount, and urging means that urges the peeling roller toward the mount. Label printing device.