JPH08142429A - Cutter of printer - Google Patents

Abstract

PURPOSE: To partially and perfectly cut a printing medium smoothly and certainly. CONSTITUTION: A stepped part 25 formed so that a cutting advance distance (X3) per a unit inclined revolving angle θ1 becomes markedly short as compared with other region is provided to the region corresponding to the partial cutting position of a movable blade 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter device for a printer capable of completely cutting and semi-cutting a printing medium such as paper.

[0002]

2. Description of the Related Art Conventionally, printers having a cutter device have been widely used. For example, in an electronic cash register, a printer with a cutter device is widely used that cuts roll paper after printing and issues a receipt. Further, in a meal ticket vending machine, a printer with a cutter device that widely cuts roll paper after printing to issue a meal ticket is widely used.

Many of the cutter devices provided in such printers are of the scissors cutting type, which has the advantage that chips are not generated.

A conventional construction of a scissor cutting type cutter device is shown in FIGS. 6 and 7. FIG. In FIG. 6, 11 is a fixed blade, 2
Reference numeral 1 is a movable blade, and 31 is a driving means.

The fixed blade 11 is fixed to the apparatus main body 2 and has a blade portion 12 capable of cutting a print medium (roll paper P in this case).

The movable blade 21 is a fulcrum (support shaft 2
The blade portion 1 of the fixed blade 11 is mounted so as to be tiltable about an axis 9) and slidable with respect to the fixed blade 11.
A blade portion 22 for cutting the print medium (P) in cooperation with 2.
have.

The driving means 31 is a CPU and an RO.
The movable blade 2 is controlled by the control device 51 including M and the like.
1 is a means for inclining and rotating about a fulcrum (29) by a set angle (θi), and includes a motor driver 32D, a drive motor 32, and a swing mechanism 33.

In this conventional example, the drive motor 32 is a stepping motor. In addition, the support mechanism 33,
The cam portion 34 includes an eccentric cam 35, a cam follower (36), a swing arm 37, and a connecting spring 38.

The eccentric cam 35 is mounted on the rotary shaft of the drive motor 32, and is eccentrically fitted into an engaging recess 36 as a cam follower formed at one end of the swing arm 37. The swing arm 37 is rotatably attached to the apparatus main body 2 about a fulcrum (the axis of the support shaft 39), and the other end is connected to the base end of the movable blade 21 via a connection spring 38. ing.

When the drive motor 32 is driven to rotate the eccentric cam 35, the movable blade 21 is tilted and rotated with respect to the fixed blade 11 via the swing arm 37 and the connecting spring 38. Therefore, when the movable blade 21 is tilted and rotated by an angle (θf) set so that the roll paper P is completely cut in the width direction, the movable blade 21 is conveyed on the paper conveyance path 9 and fixed blade 11 and the movable blade. The roll paper P inserted between the roll paper 21 and 21 can be completely cut by the double blades (11, 21).

By the way, when the roll paper P is completely cut by the above-mentioned cutter device, the roll paper P may drop on the paper transport path 9 and cause a jam due to the operator not picking it up. Further, in a printer that issues a meal ticket, the meal ticket is often in the form of a rice ball.
Therefore, the cutter device is generally configured to be able to cut (semi-cut) the roll paper P in the width direction while leaving an uncut portion.

In the above-mentioned cutter device, in the case of half-cutting, the control device 51 controls the cutting advancing distance X of the movable blade 21.
The motor driver 32 is configured so that the movable blade 21 is tilted and rotated by a preset angle (θh) so that the roll paper P is reduced by the uncut dimension w1 from the width dimension w.
Control D. As a result, the roll paper P becomes
As shown in (A) and (B), it is semi-cut, leaving the uncut portion P1. Here, the cutting progress distance X of the movable blade 21
Means the distance at which the movable blade 21 tilts and rotates to contact the roll paper P, and the paper P is cut from one end in the width direction.

[0013]

However, in the above-mentioned conventional cutter device, no matter how accurately the control device 51 controls the set angle (θh) when the roll paper P is half cut, the swing mechanism 33 is used. If the uncut portion P1 of the roll paper P is too long, it may be difficult to reach the end, or conversely, it may be too short and fall onto the paper transport path 9 to easily cause a jam.

In view of the above circumstances, an object of the present invention is to provide a cutter device for a printer that can smoothly and reliably cut a print medium into half and completely.

[0015]

SUMMARY OF THE INVENTION According to the present invention, a fixed blade, a movable blade slidably provided with respect to the fixed blade, and a movable blade are formed so as to be inclined and rotatable by a set angle about a fulcrum. The drive means including a fixed blade and a movable blade are interposed between the fixed blade and the movable blade to change the cutting angle of the movable blade from one end in the width direction of the print medium to completely change the setting angle. In a cutter device of a printer configured to be cuttable and to be semi-cut with an uncut portion left in the width direction, the cutting proceeding distance per unit tilt rotation angle is provided at a portion of the movable blade corresponding to the half-cutting position. Has a step formed to be significantly shorter than other parts,
It is characterized by the following.

[0016]

According to the present invention having the above-described structure, when the print medium is half-cut, the drive means is driven so that the movable blade is inclined and rotated by an angle preset for half-cutting. Here, since the step corresponding to the semi-cutting position of the movable blade is provided with a step having a remarkably shorter cutting distance than the other parts, the movable blade is actually a movable part of the drive means. Even when it is not accurately tilted and rotated by the set angle due to play (that is, when the actual rotation angle is different from the set angle and causes a deviation), the deviation can be absorbed by the step (the step is not , Including those with a cutting distance of zero). As a result, the print medium can be half-cut without excess or deficiency.

By tilting and rotating the movable blade by an angle preset for complete cutting, the print medium interposed between the movable blade and the fixed blade can be completely cut.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. The cutter device of the printer according to this embodiment is shown in FIG.
As shown in FIG. 2 and FIG. 2, the basic configuration is the same as that of the conventional example (FIGS. 6 and 7), but a step 25 is provided at a portion corresponding to the half-cutting position of the movable blade 21 to smoothly and surely In this embodiment, the roll paper P) can be cut into half and complete cuts. The same components as those in the conventional example (FIGS. 6 and 7) are designated by the same reference numerals, and the description thereof will be simplified or omitted.

Specifically, as shown in FIG. 2, a unit tilt rotation angle θ1 is provided at a portion corresponding to the half-cutting position of the movable blade 21.
The cutting progress distance (X3) per hit is other part (22A, 22
Step 2 formed to be significantly shorter than B)
5 are provided.

More specifically, the step 25 is formed by the movable blade 21.
Is provided between the first blade portion 22A provided on the base end side and the second blade portion 22B provided on the tip end side,
Connection line (r per unit tilt rotation angle θ1 of the movable blade 21)
3) the fluctuation amount of the length of the first and second blade portions (22A, 22
The straight line is formed so as to be significantly smaller than the variation amount of the length of the connecting lines (r1, r2) in B). Here, the connecting line r3 (r1, r2) is an axis of the support shaft 29 and an arbitrary point on the step 25 [first and second blade portions (22A, 22A,
22B) an arbitrary point on the line].

In this step 25, the first and second blades (2
2A, 22B), and a blade portion 22C having the same shape is formed. As a result, the portion of the roll paper P cut at the step 25 is extremely short, but the cut surface can be formed neatly like other portions.

Further, the movable blade 21 has first and second blade portions (2
2A, 22B) are formed so that the cutting travel distance (X1, X2) per unit tilt rotation angle θ1 is uniform. Accordingly, the first and second blade portions (22A, 22
B) can be used to cut the roll paper P at a constant cutting progress speed, and the cutting operation can be performed more smoothly.

Next, the operation of this embodiment will be described. When cutting the roll paper P that is conveyed on the paper conveyance path 9 and is inserted between the fixed blade 11 and the movable blade 21, the control device 51 determines that the cutting progress distance X of the movable blade 21 is the width of the roll paper P. The motor driver 32D is controlled so that the movable blade 21 is tilted and rotated by an angle (θh) set in advance so as to be smaller than the dimension w by the uncut dimension w1.

As a result, the movable blade 21 is tilted and rotated by the drive motor 32 and the swinging mechanism 33 by an amount corresponding to the set angle as shown in FIG. 3A, and the roll is rolled as shown in FIG. 3B. The sheet P is half-cut in the width direction, leaving an uncut portion P1.

In this case, the other portion [first and second blade portions (22
A, 22B)], the step 25 having a significantly shorter cutting travel distance (X3) is provided, so that the actual rotation angle of the movable blade 21 is set by the backlash of the swing mechanism 33 or the like (θ.
Even when a deviation is generated unlike h), the deviation is changed to the step 25.
Can be absorbed by. Therefore, the roll paper P can be smoothly and reliably half-cut.

Further, by driving the driving means 31 so that the movable blade 21 tilts and rotates by the set angle (θf), the roll paper P interposed between the movable blade 21 and the fixed blade 11 can be completely cut. it can.

According to this embodiment, however, the movable blade 2
Unit tilt rotation angle θ at the part corresponding to the half cut position of 1
Since the step 25 is formed so that the cutting progress distance (X3) per unit is remarkably shorter than other parts, the roll paper P as a print medium is smoothly and reliably uncut and cut. Can be completely cut.

Although the step 25 is formed linearly in the above embodiment, as shown in FIG. 5A, the cutting travel distance (X3) per unit tilt rotation angle θ1 becomes zero, as shown in FIG. 5 (A).
An arc shape centered on the fulcrum (29) has a connecting line (r
The structure of 3) may be formed so that the length does not change. With such a structure, it is possible to more accurately perform half-cutting. The step 25 may be formed by approximating the above “arc” with a straight line.

Further, the step 25 may be formed so that the connecting line (r3) decreases as the tilt rotation angle θi increases, as shown in FIG. 5 (B). With such a configuration, the step 25 can be cut into half and complete without contacting the roll paper P, so that the cutting operation can be performed more smoothly and reliably.

[0030]

EFFECTS OF THE INVENTION According to the present invention, a step is formed at the portion corresponding to the half-cutting position of the movable blade so that the cutting progress distance per unit tilt rotation angle is significantly shorter than that of other portions. Since the configuration is provided, the print medium can be smoothly and reliably half-cut and completely cut.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining an embodiment of the present invention.

FIG. 2 is also a diagram for explaining a movable blade and a fixed blade.

FIG. 3 is also a diagram for explaining half-cutting of roll paper.

FIG. 4 is also a diagram for explaining complete cutting of roll paper.

FIG. 5 is a diagram for explaining a modified example of the step of the movable blade.

FIG. 6 is a perspective view for explaining a conventional configuration of a cutter device.

FIG. 7 is also a diagram for explaining a movable blade and a fixed blade.

FIG. 8 is a diagram for explaining half-cutting of roll paper.

[Explanation of symbols]

 11 Fixed Blade 12 Blade 21 Movable Blade 22A First Blade 22B Second Blade 25 Step 31 Drive Means

Claims (1)

[Claims] 1. A fixed blade, a movable blade slidably provided with respect to the fixed blade, and a drive means which is formed so as to be tilted and rotatable by a set angle about the movable blade as a fulcrum.
By changing the setting angle of the print medium interposed between the fixed blade and the movable blade, the cutting progress distance from one end of the print medium in the width direction of the movable blade can be changed to allow complete cutting and uncut in the width direction. In a cutter device of a printer configured to be capable of semi-cutting with a part left, in a part corresponding to the half-cutting position of the movable blade, the cutting progress distance per unit tilt rotation angle is compared to other parts. A cutter device for a printer, which is provided with a step formed to be extremely short.