JP2008030198A - Cutter device and printer using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter device capable of visually confirming whether a movable blade 9 returns to a standby position or not easily and precisely, and returning the movable blade 9 at an original position promptly. <P>SOLUTION: A window part 111 is provided in a cover 11a of a cutter unit frame 11, e.g. a triangle mark 230 is provided on the surface of a worm wheel 23, and this mark 230 is displayed in the window part 111 when the movable blade 9 is at the standby position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a printer such as an electronic cash register used in, for example, a POS (Point-Of-Sale) system, and more particularly to a printer including a cutter that automatically cuts a recording sheet.

In general, this type of printer is provided with a cutter for cutting the recording sheet in order to print it on a roll-shaped recording sheet with a thermal head or the like and then hand it as a receipt.

As such a cutter, for example, as described in JP-A-6-238970 (Patent Document 1), a cutter blade is projected in a direction perpendicular to the recording sheet, and the recording sheet is cut. As disclosed in Japanese Utility Model Laid-Open No. 54-123482, a recording sheet is cut by a combination of a fixed blade and a rotary blade.

Further, as described in Japanese Utility Model Laid-Open No. 2-10953 (Patent Document 2), a so-called scissor type cutter in which the movable blade moves in a direction orthogonal to the recording sheet and cuts while moving the cutting portion from one end to the other end. It has been known.

JP-A-6-238970 Japanese Utility Model Publication No. 2-10953 (microfilm)

However, a printer having such a cutter has the following problems.

That is, some abnormality may occur during the operation of the printer, and the movable blade may stop in the middle of cutting. At that time, there is a problem that the movable blade built in the cutter unit cannot be confirmed.

In addition, in this type of apparatus, when the operation stops in the middle of cutting the recording sheet,
It is desirable to return to the current state smoothly.

The present invention has been made in consideration of such problems of the conventional technology, and the purpose of the present invention is to easily and accurately confirm whether or not the movable blade has returned to the standby position, It is an object of the present invention to provide a cutter device that can quickly return a movable blade to its original position and a printer including the cutter device.

In order to achieve this object, the invention according to claim 1 is a pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades. Is disposed close to the blade portion of the movable blade, or the blade portion of the fixed blade is spaced apart from the blade portion of the movable blade, and the blade portion of the movable blade is fixed. A movable blade driving means that crosses and slides in a scissor shape in a state of point contact with the blade portion of the blade, with the blade portion of the movable blade and the blade portion of the fixed blade facing the tip side of the blade Inclining means for relatively inclining is provided.

The invention according to claim 2 is characterized in that the tilting means bends the blade portion at a predetermined angle with respect to the mounting portion of the movable blade.

The invention according to claim 3 is characterized in that the tilting means is provided with a spacer between a portion of the mounting portion of the movable blade opposite to the blade portion and a support portion of the movable blade. .

The invention according to claim 4 is characterized in that the inclination means is provided with an adjustment means for adjusting a relative inclination angle between the blade portion of the movable blade and the blade portion of the fixed blade.

According to a fifth aspect of the present invention, the tilting means is a tilt angle variable that changes a relative tilt angle between the blade portion of the movable blade and the blade portion of the fixed blade according to the operating position of the movable blade. Means is provided.

On the other hand, according to the sixth aspect of the present invention, a pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are connected to the movable blades. A blade support means for disposing the blade portion of the fixed blade, or a blade support means for disposing the blade portion of the fixed blade apart from the blade portion of the movable blade; and the blade portion of the movable blade as the blade portion of the fixed blade. In the state of point contact with the movable blade drive means for cross-sliding in a scissor shape, the movable blade and the fixed blade have a difference in hardness between the blade edge of the movable blade and the blade edge of the fixed blade. It is characterized by being formed.

According to a seventh aspect of the present invention, there is provided a pair of separable movable blades and fixed blades arranged so that the blade portions face each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are connected to the movable blades. A blade support means for disposing the blade portion of the fixed blade, or a blade support means for disposing the blade portion of the fixed blade apart from the blade portion of the movable blade; and the blade portion of the movable blade as the blade portion of the fixed blade. In contrast, the movable blade driving means has a scissor-like crossing slide in a point contact state, and the movable blade and the fixed blade are formed with a difference in the angle of the blade edge.

Furthermore, the invention described in claim 8 is a pair of separable movable blades and fixed blades arranged so that the blade portions face each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are connected to the movable blades. A blade support means for disposing the blade portion of the fixed blade, or a blade support means for disposing the blade portion of the fixed blade apart from the blade portion of the movable blade; and the blade portion of the movable blade as the blade portion of the fixed blade. And a movable blade driving means that crosses and slides in a scissor shape in a point contact state, the fixed blade is supported at least near the blade edge, and the blade portion of the movable blade slides on the fixed blade. It is characterized by being inclined with respect to the movable blade so as to slide on the surface.

Furthermore, the invention according to claim 9 is a pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portion of the fixed blade is connected to the movable blade. A blade support means for arranging the blade portion of the fixed blade at a position close to the blade portion of the fixed blade, or a blade support means for separating the blade portion of the fixed blade from the blade portion of the movable blade; Movable blade driving means for cross-sliding in a scissor-like manner in a point contact state, the fixed blade is supported at least in the vicinity of the blade edge, and the blade portion of the movable blade is slid on the fixed blade. It is arranged to be inclined with respect to the movable blade so as to slide with the moving surface.

Furthermore, the invention described in claim 10 is a pair of separable movable blades and fixed blades arranged so that the blade portions face each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are connected to the movable blades. A blade support means for arranging the blade portion of the fixed blade at a position close to the blade portion of the fixed blade, or a blade support means for separating the blade portion of the fixed blade from the blade portion of the movable blade; And a movable blade driving means for sliding in a scissor-like manner in a point contact state, and the movable blade is formed with a groove-shaped notch that engages with a pivot shaft that is rotatably supported. It is characterized by.

Furthermore, the invention described in claim 11 is a pair of separable movable blades and fixed blades arranged so that the blade portions face each other so as to sandwich the recording sheet conveyance path, and the blade portion of the fixed blade is connected to the movable blade. A blade support means for placing the blade portion of the fixed blade away from the blade portion of the movable blade, and a component portion that interlocks with the movable blade on which the mark is disposed. A movable blade driving means for cross-sliding in a scissors shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade, and a cutter lid that covers the movable blade and the movable blade drive means The cutter lid part is provided with a window part through which the mark can be visually recognized from the outside when the movable blade is in the retracted position.

On the other hand, in the invention described in claim 12, the blade support means is configured such that the blade portion of the movable blade and the blade portion of the fixed blade slide in a direction in which the blade portion of the fixed blade is arranged separately from the blade portion of the movable blade. It is characterized by being configured to be substantially the same as the direction.

According to a thirteenth aspect of the present invention, in the fixed blade and the movable blade, the fixed blade is disposed on a lid portion of the recording sheet storage portion, and the movable blade is disposed on a main body side having the recording portion. It was established.

In the case of the invention described in claim 1, since there is provided an inclination means for relatively inclining the blade portion of the movable blade and the blade portion of the fixed blade toward the tip side of the blade, the blade portion of the movable blade and the fixed blade The blade part comes into contact with one point reliably.

In this case, as in the invention described in claim 2, in the invention described in claim 1, by providing a movable blade formed by bending the blade portion at a predetermined angle with respect to the mounting portion, the blade portion of the movable blade and the fixed blade are provided. The blade portion comes into contact with one point more reliably.

Further, as in the invention according to claim 3, in the invention according to claim 1 or 2, the portion of the mounting portion of the movable blade opposite to the blade portion and the support portion of the movable blade If a spacer is provided between them, the blade portion of the movable blade and the blade portion of the fixed blade come into contact at a single point with a simple configuration.

Further, as in the invention according to claim 4, in the invention according to any one of claims 1 to 3, the adjusting means for adjusting a relative inclination angle between the blade portion of the movable blade and the blade portion of the fixed blade. The contact between the blade of the movable blade and the blade of the fixed blade should be optimized according to the thickness, width, quality, etc. of the recording sheet and the progress of wear of the blade of the movable blade or fixed blade. Can do.

Furthermore, as in the invention according to claim 5, in the invention according to any one of claims 1 to 4, the blade portion of the movable blade and the blade portion of the fixed blade according to the operation position of the movable blade. By providing a tilt angle variable means for changing the relative tilt angle, it is possible to ensure appropriate one-point contact over the entire blade portion of the movable blade and the fixed blade, and it is unnecessary for the blade portion of the movable blade and the fixed blade. Since an increase in load can be suppressed, wear of the blade portion is reduced.

On the other hand, as in the invention described in claim 6, the hardness of the blade edge of the movable blade and the edge of the fixed blade is made different, and the blade edge of the movable blade is fixed as in the invention of claim 7. By providing a difference in the angle of the blade edge, the blade on the side to be worn becomes worn without leaving the blade edge being rounded, and the blade edge is worn away, so that it is not necessary to replace the blade over a long period of time.

The fixed blade is supported at least in the vicinity of the cutting edge, and the movable blade is slid against the sliding surface of the fixed blade. Because the fixed blade is supported as a simple beam that supports both ends, it is possible to maintain a stable state when the movable blade slides and to increase the roundness of the blade edge of the fixed blade. Instead, it will be worn while leaving its cutting edge.

In this case, the invention according to any one of claims 6 and 7 is more effective as the invention according to claim 9.

On the other hand, if the notch part engaged with the spindle which supports a movable blade rotatably is provided like invention of Claim 10, a movable blade can be easily pulled out from a spindle, A new movable blade can be easily mounted by simply fitting the notch into the support shaft.

Further, as in the invention described in claim 11, the cutter lid portion is provided with a window portion that allows the mark to be visually recognized from the outside when the movable blade is in the retracted position, so that the movable blade is in the standby position. It is possible to easily and accurately confirm whether it has returned.

Furthermore, as in the invention described in claim 12, in the invention described in any one of claims 1 to 11, the blade support means arranges the blade portion of the fixed blade separately from the blade portion of the movable blade. Since the direction is configured to be substantially the same as the sliding direction of the blade portion of the movable blade and the blade portion of the fixed blade,
Even when the movable blade is stopped while engaged with the fixed blade at the time of cutting, the blade portion of the fixed blade can be smoothly separated from the blade portion of the movable blade. The part is never destroyed.

Furthermore, as in the invention described in claim 13, in the invention described in any one of claims 1 to 12, the fixed blade and the movable blade are arranged such that the fixed blade is attached to a lid portion of the storage portion of the recording sheet. Since the movable blade is disposed on the main body side having the recording unit, the printer that opens and closes the lid for exchanging the recording sheet has excellent sharpness without complicating the configuration. In addition, a printer having cutting means that can obtain a constant sharpness at each part of the blade is obtained.

Hereinafter, a preferred embodiment of a printer according to the present invention will be described in detail with reference to FIGS.

FIG. 3 is a perspective view showing an external configuration of the embodiment in which the upper cover of the printer according to the present invention is removed.

The printer 1 according to the present embodiment is applied to, for example, an electronic cash register used for a POS system or the like.

The printer 1 according to the present embodiment performs recording such as printing on a roll-shaped recording sheet S using a thermal recording head H (see FIG. 4). The storage unit 3 is configured to store and hold the recording paper S.

And the apparatus main body is covered with the panel 2 etc. which were attached to the case main body 4 which consists of resin, for example.

An open button 6 for driving the cover open lever 5 to rotate the cover frame 8 (see FIG. 2) when taking out the recording paper S is provided on one side of the case body 4 of the storage unit 3. It is done.

1 and 2 are perspective views showing an internal configuration of the printer 1 according to the present embodiment. FIG. 2 is an external view of the printer 1 and shows a state in which the cover of the cutter unit frame 11 is closed. FIG. 1 shows a state in which the cover 11a of the cutter unit frame 11 of the printer 1 is opened.

4 is a side view of a main part showing a state where the cover frame 8 is closed, FIG. 5 is a side view of a main part showing a state where the cover frame 8 is opened, and FIG. 6 shows the entire configuration of the movable blade 9. Perspective view, FIG.
These are the top views which show the vicinity of the fixed blade 14 and the movable blade 9 of the printer 1 of this Embodiment.

As shown in FIG. 2, in the printer 1 of the present embodiment, an openable / closable cover frame 8, a movable blade 9 described later, and its driving means 1 are provided on a main body frame 7 made of, for example, metal.
A cutter unit frame 11 for accommodating 0 is provided.

As shown in FIGS. 4 and 5, the cover frame 8 is attached so as to be swingable, that is, openable and closable about a support shaft 12 provided at the upper ends on both sides of the main body frame 7. The cover frame 8 is provided with a rectangular window 13 for avoiding contact with the recording paper S when the cover frame 8 is closed.

As shown in FIG. 1, in the printer 1 of the present embodiment, a fixed blade 14 is disposed at the end of the upper surface of the cover frame 8 on the cutter unit frame 11 side. The fixed blade 14 is made of, for example, a metallic long plate-like plate member. And the fixed blade 14 is the blade part 1
4 a is arranged so as to face the cutter unit frame 11. Further, a slit-shaped paper discharge port 15 for conveying and discharging the recording paper S is provided between the blade portion 14 a of the fixed blade 14 and the bottom portion 11 b of the cutter unit frame 11.

As shown in FIG. 7, a concave portion 14b and a convex portion 14c for positioning are provided at both ends of the fixed blade 14, respectively. These concave portions 14 b and convex portions 14 c are formed so as to fit into the fixed blade support portions 16 provided at both ends of the cover frame 8.

The fixed blade 14 is pressed against the surface of the cover frame 8 from above by two pressing springs 17 fixed on the cover frame 8.

When starting to cut, the fixed blade 14 is pressed downward by the movable blade 9, so that the presser spring 1
The pressing force of 7 does not need to be increased so much, and the cutting quality and the like are not greatly influenced by the pressing force, so it is only necessary to prevent the fixed blade 14 from coming off.

As shown in FIG. 4, the fixed blade support part 16 of this Embodiment is formed in the substantially U shape, and becomes the shape where the upper part was open | released. In this case, the fixed blade support portion 16 is formed so that the support protrusion 16b on the cover frame 8 side is larger than the support protrusion 16a on the front side. When the cover frame 8 is closed, the blade portion side of the fixed blade 14 rides on the bottom portion 110 of the main body 11b of the cutter unit frame 11, and the blade portion side is lifted so that a gap is formed between the cover frame 8 and the cover frame 8.

On the other hand, a movable blade 9 for cutting the recording paper S together with the fixed blade 14 is provided at the bottom 110 of the main body 11 b of the cutter unit frame 11. In this case, the movable blade 9 has an arrow A in FIG. 1 centered on, for example, a support shaft 18 provided at one end of the cutter unit frame 11.
It is attached so as to be rotatable in the direction or the opposite direction.

Further, the movable blade 9 is provided around the support shaft 18 and is pressed against the bottom 110 of the main body 11b of the cutter unit frame 11 by a coil spring 19 whose upper end is locked by a push nut attached to the support shaft 18. It is done. In addition, an elongated hole 20 for driving the movable blade 9 is provided in a substantially central portion of the movable blade 9.

As shown in FIG. 1, the movable blade 9 is provided on the back surface of the cover 11 a of the cutter unit frame 11.
A driving means 10 for driving is provided. That is, the drive motor 21 is attached to the back surface of the cover 11 a and the worm gear 22 is attached to the rotation shaft of the drive motor 21. A worm wheel 23 is disposed so as to mesh with the worm gear 22, and the worm wheel 23 is provided with a crank pin 24 that engages with the long hole 20 of the movable blade 9. Further, a sensor 25 for detecting the rotation angle of the worm wheel 23 is provided between the worm wheel 23 and the cover 11a.
To the circuit board 27 via The drive motor 21 is also connected to the circuit board 27 via the lead wire 28. Accordingly, the drive motor 21 is configured to rotate based on the rotation angle of the worm wheel 23 detected by the sensor 25.

A spur gear portion 29 is formed at the base end portion of the worm gear 22, and the spur gear portion 29 is configured to be exposed from the cover 11 a of the cutter unit frame 11 as shown in FIG. 2. Thereby, it is possible to manually rotate the rotation shaft of the drive motor 21 and move the fixed blade 14.

As shown in FIG. 6, the movable blade 9 of this embodiment is formed in the same shape as a known scissors blade. That is, the movable blade 9 is made of, for example, a long plate-shaped member made of metal, and a blade portion 9a is formed on one edge thereof. As will be described later, the movable blade 9 is slightly bent in the direction of the back surface in the vicinity of the mounting portion 9b, and the back surface of the movable blade 9 is formed in a concave shape in the direction of the tip of the blade. Further, in order to prevent paper breakage at the uncut portion of the recording paper S when the blade tip is thick, a blade portion 9c thinner than the central blade portion 9a is formed at the front end portion of the surface of the movable blade 9. Has been.

As shown in FIG. 7, the fixed blade 14 has an end portion of the fixed blade 14 adjacent to the movable blade 9.
14 d for engaging the movable blade 9 is formed. This protrusion 14d is
In a state where the cover frame 8 is closed, the cover unit 8 is formed so as to ride on the bottom 110 of the body 11b of the exposed cutter unit frame 11. Accordingly, as shown in FIG. 16, the fixed blade 14 is directed upward from the horizontal, and a slight gap is formed between the surface of the cover frame 8 of the fixed blade 14.

An inclined portion 14e for scooping up the movable blade 9 is formed on the upper edge portion of the protruding portion 14d on the fixed blade 14 side. A protruding portion 14f is also formed at the tip of the movable blade 9 in the end portion of the fixed blade 14, and this protruding portion 14f also has a bottom 110 of the main body 11b of the cutter unit frame 11 in a state where the cover frame 8 is closed. And the blade part is lifted to form a gap with the cover frame 8.

As shown in FIG. 7, in the present embodiment, the length of the movable blade 9 is a predetermined distance D longer than the length of the blade portion 14a of the fixed blade 14 so that the recording paper S is not completely separated. It is set so that it can be cut off at a part of the edge of the paper.

As shown in FIG. 7, the movable blade 9 and the bottom surface 110 of the main body 11 b of the cutter unit frame 11.
A cradle 30 is provided between the two. The cradle 30 is preferably a flat plate member having the same thickness as the fixed blade 14, and in the present embodiment, the fixed blade 14 and the cradle 30 are removed from the same material in a pressing process. To achieve the same thickness,
Even if it is a separation type, a good sharpness is ensured as with the integrated scissors. Then, the movable blade 9 and the cradle 30 are notched so as to overlap the portions facing the fixed blade 14, respectively.
0a is formed, and thereby the bottom 11 of the main body 11b of the cutter unit frame 11 in a state where the movable blade 9 is drawn into the cutter unit frame 11 (the state shown in FIG. 7).
The blade portion 14a of the fixed blade 14 and the blade portion 9a of the movable blade 9 are configured so that 0 is exposed.
The angle at which the crossing starts, that is, the angle at which cutting starts can be made large, and an excellent cutting quality can be obtained.

  FIG. 8 shows the bending angle of the main body 90 of the movable blade 9.

As shown in FIG. 8, in the present embodiment, the main body 90 is bent about 1 ° on the back side with respect to the mounting portion 9b. Furthermore, the main body 90 of the movable blade 9 is formed to be slightly curved toward the tip side of the blade.

In addition, in the present embodiment, the movable blade 9 is further inclined with respect to the fixed blade 14. That is, in the scissor-type cutter device, it is necessary to ensure one-point contact between the blade portions of the blades that cross and slide relatively, and as described above, the movable blade 9 faces the tip side of the blade. Although it is formed so as to be slightly curved, an appropriate one-point contact between the blade portions 9a and 14a cannot be obtained because the amount of deformation due to bending is small at the portion near the support shaft 18 at the start of cutting. Therefore, as will be described below, the main body 90 of the movable blade 9 is forcibly inclined to ensure one-point contact of the fixed blade 14 with the blade portion 14a.

  9 and 10 show means for inclining the main body 90 of the movable blade 9.

In order to incline the movable blade 90, a spacer 130 can be provided between the mounting portion 9b of the fixed blade 14 and the cradle 30 as shown in FIG. Further, as shown in FIG. 9B, the spacer 130 can be provided between the cradle 30 and the bottom 110 of the main body 11 b of the cutter unit frame 11.

Further, as shown in FIG. 10 (a), a protrusion 30b is provided on the surface of the cradle 30, or FIG.
As shown in 0 (b), a protrusion 30 c can be provided on the back surface of the cradle 30.

Furthermore, as shown in FIGS. 9C and 10C, a screw 131 is attached to the cradle 30 so that one end of the cradle 30 is floated from the bottom 110 of the main body 11b of the cutter unit frame 11. You can also According to this example, by rotating the screw 131, the contact between the blade portion 9a of the movable blade 9 and the blade portion 14a of the fixed blade 14 can be optimized.

As described above, according to the present embodiment, since the main body 90 of the movable blade 9 is bent and the movable blade 9 is tilted, the amount of deformation due to bending at the start of cutting close to the support shaft 18 is reduced. Even at a small position, the blade portion 9a of the movable blade 9 and the blade portion 14a of the fixed blade 14 can be reliably brought into contact at one point, and the sharpness and linearity of the movable blade 9 and the fixed blade 14 are improved. be able to.

In this case, as shown in FIGS. 9 (c) and 10 (c), if the angle of the cradle 30 is adjusted by a screw, the thickness, width, paper quality, etc. of the recording paper S or the movable blade 9 or The contact between the blade portion 9a of the movable blade 9 and the blade portion 14a of the fixed blade 14 can be optimized according to the progress of wear of the blade edge of the fixed blade 14, and as a result, always stable sharpness and linearity can be achieved. Can be maintained and the life of the cutter can be extended.

By the way, the scissors-type device that is arranged so as to be rotatable by the support shaft at the end of the movable blade as described above and presses the movable blade against the fixed blade by the spring disposed on the support shaft is cut near the support shaft 18. In the first part, the spring force of the coil spring 19 acts, but the acting force decreases according to the cutting end side. That is, the movable blade 9 is formed to be slightly curved toward the tip side of the blade, and when it intersects the fixed blade 14 on the tip side, the support shaft 1
8 is lifted from the fixed blade, and the spring force acts on the end of the mounting portion 9b of the movable blade 9 and both ends of the cutting position. Become. Therefore, in the present invention, this problem can be solved by the following configuration.

As shown in FIG. 11, in this embodiment, for example, when a spacer 130 is provided between the mounting portion 9b of the movable blade 9 and the cradle 30 as shown in FIG. The spacer 130 is formed in such a shape that the contact portion 130a between the spacer 130 and the mounting portion 9b approaches the support shaft 18 as the movable blade 9 rotates.
That is, the distance between the rotation center O of the contact portion 130a and the support shaft 18 between the spacer 130 and mounting portion 9b when movable blade 9 is in the retracted position and L _1, by rotating the movable blade 9 by an angle θ when the distance between the rotation center O of the contact portion 130a and the support shaft 18 between the spacer 130 and mounting portion 9b when it is in the position of the end cutting and L _2, the spacer of L _1> L ₂ and so as to have a thickness t 1
30 is formed. In this case, the inclination of the mounting portion 9b at the retracted position of the movable blade 9 is t / L ₁ ,
Since the inclination of the attachment portion 9b after rotation becomes t / L ₂ , the relative inclination of the blade portion 9a of the movable blade 9 increases with the rotation.

In the above configuration, when the movable blade 9 rotates, the amount of inclination increases according to the tip, and the coil spring 19 is further compressed to increase the spring force. Therefore, the decrease in the acting force is reduced and the sharpness is not lowered.

In FIG. 11, the contact portion 1 of the spacer 130 that contacts the mounting portion 9 b of the movable blade 9.
Although 30a is formed in a linear shape, the present invention is not limited to this, and may be formed in a curved shape. Further, not only when the spacer 130 is provided between the cradle 30 and the mounting portion 9b of the movable blade 9, but also when the protrusion 30b is provided on the surface of the cradle 30 as shown in FIG. Applicable.

  FIG. 12 shows another example of the movable blade 9.

As shown in FIG. 12, in this movable blade 9A, a notch 91 for engaging with the support shaft 18 is provided in the mounting portion 9b.

As described above, the movable blade 9 is attached to the bottom portion 110 of the main body 11b of the cutter unit frame 11 by inserting a hole formed in the attachment portion 9b into the support shaft 18, but the coil spring 19 is used by using a push nut. When the upper end of the blade is regulated, it is difficult to remove the push nut, so that the movable blade 9 cannot be replaced.

Then, as shown in FIG. 12, if the notch part 91 is provided in the attachment part 9b, the movable blade 9A can be easily replaced. That is, since the attachment portion 9b of the movable blade 9A is only urged by the coil spring 19, it can be easily pulled out, and a new movable blade 9A can be attached to the support shaft 18 with a notch 91. This can be done simply by fitting.

In addition, since the long hole 20 of the movable blade 9A and the crank pin 24 are engaged after the assembly of the apparatus, the movable blade 9A does not come off.

  Next, the operation of the printer 1 of this embodiment will be described.

First, when cutting the recording paper S, the drive motor 21 is driven at a predetermined timing with respect to the recording paper S for which recording such as printing has been completed. As a result, as shown in FIG. 1, the worm gear 22 attached to the rotation shaft of the drive motor 21 rotates, and the worm wheel 23 that meshes with the worm gear 22 rotates, so that the crankpin 24 and the movable blade of the worm wheel 23 are rotated. 9
The movable blade 9 moves in the direction of arrow A by the link mechanism comprising the long holes 20.

In the present embodiment, as shown in FIG. 7, a cradle 30 having the same thickness as the fixed blade 14 is provided between the movable blade 9 and the bottom 110 of the main body 11b of the cutter unit frame 11. Since the inclined portion 14e is formed on the protruding portion 14d of the fixed blade 14, the movable blade 9 easily rides on the fixed blade 14 and smoothly meshes therewith.

Further, when the movable blade 9 is moved in the direction of arrow A, the blade portion 14a of the fixed blade 14 and the blade portion 9a of the movable blade 9 come into contact at one point, and the contact point moves toward the tip portion of the movable blade 9. To do. As a result, the recording paper S is smoothly cut according to the principle of scissors.

When the drive motor 21 is further driven after the cutting of the recording paper S is completed, the movable blade 9 is moved to the arrow A in FIG. 1 by the link mechanism including the crank pin 24 of the worm wheel 23 and the long hole 20 of the movable blade 9. It moves in the direction opposite to the direction and is accommodated in the cutter unit frame 11 again. Then, when the sensor 25 detects that the rotation angle of the worm wheel 23, that is, the position of the movable blade 9 has returned to the home position, the operation is controlled so as to stop the drive motor 21.

Incidentally, some abnormality occurs during the operation of the printer 1, and the movable blade 9 may stop in the middle of cutting as shown in FIG. In that case, as described above, the fixed blade 14 can be returned into the cutter unit frame 11 by manually rotating the spur gear portion 29 exposed from the cover 11 a of the cutter unit frame 11.
Is not within the allowable range of the standby position, the movable blade 9 rides on the inclined portion 14e of the fixed blade 14, and the cover frame 8 cannot be opened and closed.

Therefore, as shown in FIGS. 1 and 14, in the present embodiment, a window 111 is provided on the cover 11a of the cutter unit frame 11, and a triangular mark 230 is provided on the surface of the worm wheel 23, for example. The mark 230 is configured to be displayed on the window 111 when 9 is in the standby position. According to such a configuration, it is possible to easily and accurately confirm whether or not the movable blade 9 has returned to the standby position, and the movable blade 9 can be quickly returned to its original position.

Further, as described above, when the recording paper S is repeatedly cut by the movable blade 9 and the fixed blade 14, there is a problem that the cutting edge is worn and rounded and the sharpness is deteriorated. In this case, in order to extend the lifetime of the movable blade 9 and the fixed blade 14, it is effective to adopt the following configuration.

First, it is effective to have a difference in hardness between the movable blade 9 and the fixed blade 14. In the case of the present embodiment, the movable blade 9 and the fixed blade 14 are made of stainless steel similar to general stainless steel scissors such as SUS420J2 as a material, and press punching → quenching, tempering → barrel → blading → Manufactured through a process called warping, the hardness of the movable blade 9 is fixed to the fixed blade 1.
The hardness should be greater than 4. For example, the movable blade 9 is HRC50 in Rockwell hardness, and the fixed blade 14 is similarly HRC45.

Second, each is manufactured such that the blade edge angle of the fixed blade 14 is larger than the blade edge angle of the movable blade 9. For example, as shown in FIG. 15, the cutting edge angle of the movable blade 9 is 10 °, and the cutting edge angle of the fixed blade 14 is 15 ° to 20 °.

By adopting such a configuration, the blade edge of the fixed blade 14 on the side to be worn becomes worn without leaving the blade edge, and the life of the movable blade 9 and the fixed blade 14 is extended. Can do.

Note that the fixed blade 14 is worn because the fixed blade 14 is easier to replace than the movable blade 9. However, as shown in FIG. 12, the movable blade 9A having a notch 91 is used. In such a case, since the replacement is easy, the movable blade 9 may be worn.

In addition, the life of the fixed blade 14 can be extended by changing the facing angle between the movable blade 9 and the fixed blade 14.

That is, as shown in FIG. 16A, the groove portion of the fixed blade support portion 16 is formed deeply, and the fixed blade 14 is inclined so that the blade portion 14 a of the fixed blade 14 faces the sliding surface of the movable blade 9. By doing so, the blade 9 a of the movable blade 9 and the blade 14 a of the fixed blade 14 are not damaged, and the fixed blade 14 is not damaged.
As shown in FIG. 16B, the groove portion of the fixed blade support portion 16 is formed shallowly, and the blade of the movable blade 9 can be cut. When the fixed blade 14 is inclined so that the portion 9a faces the sliding surface of the fixed blade 14, the fixed blade 14 is more stable during cutting and the life of the fixed blade 14 can be extended.

Here, the stability of the fixed blade 14 is increased by the two points of the bottom 110 of the main body 11b of the cutter unit frame 11 and the fixed blade support 16 as shown in FIG. This is because it is supported as a beam.

On the other hand, the life of the fixed blade 14 can be extended by the configuration shown in FIG.
For the following reason.

That is, as shown in FIG. 17A, when the blade portion 14 a of the fixed blade 14 faces the sliding surface of the movable blade 9, in particular, the hardness of the movable blade 9 is greater than the hardness of the fixed blade 14 as described above. If it is configured to be larger, the sharpest tip portion of the blade portion 14a of the fixed blade 14 is worn by repeating the cutting, and the roundness of the blade edge is increased.

On the other hand, as shown in FIG. 17B, when the blade portion 9a of the movable blade 9 is opposed to the sliding surface of the fixed blade 14, the fixed blade 14 is worn from the blade edge toward the center portion. Therefore, the angle of the blade edge of the blade portion 14a does not change so much. That is, in FIGS. 17A and 17B, the angles of the respective blade edges are θ ₁ > θ ₂ .

Therefore, according to the configuration shown in FIG. 17B, the movable blade 9 and the fixed blade 14 are worn while leaving the cutting edge without increasing the roundness of the fixed cutting edge 14 on the wear side.
Can extend the service life.

18 and 19 show another embodiment of the printer according to the present invention. Hereinafter, portions corresponding to those of the above-described embodiment will be described with the same reference numerals.

As shown in FIGS. 18 and 19, in the present embodiment, the cutter unit frame 11 is provided at the front portion of the main body frame 7 in the same manner as the above-described embodiment, and the cover frame 80.
Is attached so as to be openable and closable around the support shaft 12. In the present embodiment, the movable blade 9 and the fixed blade 14 are attached in the same direction as the direction in which the cover frame 80 opens.
However, the positional relationship between the movable blade 9 and the fixed blade 14 is the same as in the above-described embodiment. The fixed blade 14 is arranged on the upstream side in the conveyance direction of the recording paper S, and the movable blade 9 is on the downstream side. Arranged.

In the above-described embodiment, the movable blade 9 and the fixed blade 14 are arranged perpendicular to the opening direction of the cover frame 8, but in such a configuration, for example, in the middle of cutting, as shown in FIG. When the movable blade 9 stops when the movable blade 9 rides on the fixed blade 14, the cover frame 8 cannot be opened, and if it tries to open it forcibly, the mechanism parts around the movable blade 9 and the fixed blade 14 are There is a risk of breaking.

On the other hand, according to the present embodiment, since the fixed blade 14 is attached in the same direction as the direction in which the cover frame 80 opens, the movable blade 9 stops in a state where the movable blade 9 rides on the fixed blade 14. Even in this case, the cover frame 80 can be opened, and the mechanical parts around the movable blade 9 and the fixed blade 14 can be prevented from being broken.

The present invention is not limited to the above-described embodiment, and various changes can be made.

For example, the bending angle of the movable blade can be changed somewhat, but it is more effective to set it to about 1 ° as in the above-described embodiment.

Various spacer positions and shapes can be employed. Furthermore, the marks provided on the worm wheel can have various positions and shapes as long as they can be visually observed at the standby position of the movable blade.

1 is a perspective view showing an internal configuration of an embodiment of a printer according to the present invention, and shows a state where a cover of a cutter unit frame is opened. FIG. It is a perspective view which shows the internal structure of the embodiment, and shows the state which closed the cover of the cutter unit frame. It is a perspective view which shows the external appearance structure of the embodiment. It is a principal part side view which shows the state which closed the cover frame of the embodiment. It is a principal part side view which shows the state which opened the cover frame of the embodiment. It is a perspective view which shows the whole structure of the movable blade of the embodiment. It is a top view which shows the vicinity of the fixed blade and movable blade of the printer of the embodiment. It is explanatory drawing which shows the bending angle of the main-body part of the movable blade of the embodiment. It is a block diagram which shows the means for inclining the main-body part of the movable blade of the embodiment. It is a block diagram which shows the means for inclining the main-body part of the movable blade of the embodiment. It is explanatory drawing which shows the principle in which the contact part of a spacer and an attachment part approaches a spindle with rotation of a movable blade in the same embodiment. It is a top view which shows the other example of the movable blade of the embodiment. It is a principal part top view which shows the state which the movable blade stopped in the same embodiment. It is a principal part top view which shows the mark and window part in the embodiment. It is explanatory drawing which shows the relationship between the blade angle | corner of the movable blade and fixed blade of the embodiment. It is a principal part side view which shows the inclination-angle of the movable blade and fixed blade in the same embodiment. It is explanatory drawing which shows the abrasion state of the fixed blade in the same embodiment. It is a side view which shows the internal structure of other embodiment of the printer based on this invention, and shows the state which closed the cover frame. It is a side view which shows the internal structure of the embodiment, and shows the state which opened the cover frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Printer, 3 ... Storage part, 5 ... Cover open lever, 7 ... Main body frame, 8 ... Cover frame, 80 ... Cover frame, 9 ... Movable blade, 9a ... Blade part, 9b ... Mounting part, 9c ... Blade part, DESCRIPTION OF SYMBOLS 90 ... Main body part, 91 ... Notch part, 10 ... Drive means, 11 ... Cutter unit frame, 11a ... Cover, 11b ... Main body, 110 ... Bottom part, 111 ... Window part, 14 ... Fixed blade, 14a
... blade part, 14b ... concave part, 14c ... convex part, 14d ... projecting part, 14e ... inclined part, 15 ... paper distribution port, 16 ... fixed blade support part, 20 ... long hole, 21 ... drive motor, 22 ... worm gear , 23 ... Worm wheel, 230 ... Mark, 24 ... Crank pin, 130 ... Spacer, 130a ... Abutting part, 131 ... Screw, H ... Recording head, S ... Recording paper.

Claims (13)

A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade Movable blade driving means for cross-sliding, and provided with tilting means for relatively tilting the blade portion of the movable blade and the blade portion of the fixed blade toward the tip side of the blade. Cutter device. 2. The cutter device according to claim 1, wherein the tilting unit is configured to bend the movable blade at a predetermined angle with respect to the mounting portion of the movable blade. The cutter device according to claim 1 or 2, wherein the tilting means includes a spacer between a portion of the mounting portion of the movable blade opposite to the blade portion and a support portion of the movable blade. . 4. The cutter device according to claim 1, wherein the tilting means is provided with an adjusting means for adjusting a relative tilt angle between the blade portion of the movable blade and the blade portion of the fixed blade. The inclination means includes an inclination angle variable means for changing a relative inclination angle between a blade portion of the movable blade and a blade portion of the fixed blade according to an operating position of the movable blade. Item 1
The cutter apparatus of Claim 4 thru | or 4. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade And a movable blade driving means for cross-sliding, wherein the movable blade and the fixed blade are formed with a difference in hardness between a blade edge of the movable blade and a blade edge of the fixed blade. apparatus. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade A cutter device comprising: a movable blade driving means for cross-sliding, wherein the movable blade and the fixed blade are formed with a difference in angle between the blade edges. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade Movable blade drive means for cross-sliding, and the fixed blade is supported at least in the vicinity of the blade edge, and the movable blade so that the blade portion of the movable blade slides on the sliding surface of the fixed blade A cutter device, characterized in that the cutter device is arranged to be inclined. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade Movable blade drive means for cross-sliding, and the fixed blade is supported at least in the vicinity of the blade edge, and the movable blade so that the blade portion of the movable blade slides on the sliding surface of the fixed blade The cutter device according to claim 6, wherein the cutter device is inclined with respect to the center. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade, and a scissor shape in a state where the blade portion of the movable blade is in point contact with the blade portion of the fixed blade A cutter device comprising: a movable blade driving means for cross-sliding, wherein the movable blade is formed with a groove-shaped notch that engages with a pivot shaft that is rotatably supported. A pair of separable movable blades and fixed blades arranged with the blade portions facing each other so as to sandwich the recording sheet conveyance path, and the blade portions of the fixed blades are arranged close to the blade portions of the movable blades, A blade support means for disposing the blade portion of the fixed blade away from the blade portion of the movable blade; and a component that interlocks with the movable blade on which a mark is disposed, and the blade portion of the movable blade is A movable blade driving means that crosses and slides like scissors in a state of point contact with the blade portion of the fixed blade; and a cutter lid portion that covers the movable blade and the movable blade drive means. A cutter apparatus, comprising: a window portion through which the mark can be visually recognized from the outside when the movable blade is in the retracted position. The blade support means is configured such that the direction in which the blade portion of the fixed blade is separated from the blade portion of the movable blade is substantially the same as the sliding direction of the blade portion of the movable blade and the blade portion of the fixed blade. The cutter device according to any one of claims 1 to 11, wherein The fixed blade and the movable blade, the fixed blade is disposed on the lid portion of the storage portion of the recording sheet,
12. The movable blade is disposed on a main body side having the recording unit.
A printer having the cutter device according to any one of the above.

Images