JP2003326492A - Sheet cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small sheet cutting device. <P>SOLUTION: This sheet cutting device comprises a fixed blade having a straight blade part formed in a straight shape and a movable blade for cutting sheets by moving forward and backward relative to the fixed blade. The movable blade comprises a guide projected part for maintaining a shearing capable of positional relation relative to the fixed blade, and the fixed blade forms a cutout part not interfered with the guide projected part when the movable blade is waiting. Thus, at the time of waiting, the guide projected part of the movable blade can reduce a distance between a waiting position and a sheet cutting completion position without being interfered with the fixed blade. As a result, the sheet cutting device can be reduced in size. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shapes of a movable blade and a fixed blade in a paper cutting device for cutting sheets such as paper and plastic films in devices such as printers and ticket issuing machines.

[0002]

2. Description of the Related Art A conventional sheet cutting device for cutting a sheet using a fixed blade and a movable blade is a movable blade in which a pressure contact spring presses and urges the entire movable blade against the fixed blade. There is a structure in which the sheet between the fixed blade and the movable blade is cut by meshing the fixed blade and the movable blade while abutting the tip of the blade tip portion of the blade with the fixed blade.

Next, a conventional example will be described with reference to FIGS. 10, 11, 12, 13, and 14. Figure 10
FIG. 6 is a main cross-sectional view showing a configuration of a printer incorporating a paper cutting device in a conventional example and a standby state thereof. 11: is explanatory drawing which shows the state of the movable blade 513 and the fixed blade 504 which were seen from the CC line arrow direction shown in FIG. Figure 1
2, the movable blade 513 cooperates with the fixed blade 504 to seat the sheet 5.
It is sectional drawing which shows the state which cut | disconnected 02. FIG. 13 is an explanatory diagram showing the states of the movable blade 513 and the fixed blade 504 as seen from the direction of the arrow DD in FIG. 14 is shown in FIG.
FIG. 11 is a cross-sectional view showing a state in which the cutter first unit 503 shown in FIG. 0 is rotated to largely separate the fixed blade 504 from the movable blade 513.

With reference to FIG. 10, an outline of a configuration of a printer incorporating a paper cutting device in a conventional example in a standby state will be described. The printer 501 has a print head 50
1a is provided, and a cutter first unit 503 and a cutter second unit 506 that form a sheet cutting device.
Is built in. The cutter first unit 503 is rotatably attached by the cutter support shaft 501b, and the cutter second unit 506 is fixedly attached.

A platen 503a, a fixed blade 504, and a sheet guide member 505 are attached to the first cutter unit 503, and a sheet 502 is mounted between the platen 503a and the print head 501a. The cutter second unit 506 has a skeleton composed of the first frame body 507a, the second frame body 507b, and the upper plate 507c, and the motor 5 having the rotation output shaft 508a in the first frame body 507a.
08 is attached to the rotary output shaft 508a, and a worm 509 is attached to the rotary output shaft 508a. The worm wheel 510 is rotatably attached to the first frame 507a. A movable blade drive wheel 511 is rotatably attached to the second frame 507b, and the movable blade drive wheel 511 is mounted on the worm wheel 510 by a gear (not shown).
And is configured to rotate with the rotation of the rotation output shaft 508a.

The movable blade drive wheel 511 has a drive pin 51 for reciprocating the movable blade 513 in the direction of the fixed blade 504.
2 is fixed, and the drive pin 512 has a movable blade 513.
Drive hole 5 provided as shown in FIG.
It is fitted to 13a. A movable blade pressing member 514 for elastically pressing the movable blade 513 against the fixed blade 504 when the movable blade 513 is in contact with the fixed blade 504 is attached to the upper plate 507c.

The states of the movable blade 513 and the fixed blade 504 as seen from the direction of the arrow CC in FIG. 10 will be described with reference to FIG. The straight blade portion 504a has an edge formed by grinding. The movable blade 513, which is disposed so as to face the straight blade portion 504a and cooperates with the fixed blade 504 to cut the sheet 502, has a drive hole 513a for engaging the drive pin 512 and a fixed blade 504. And a V-shaped blade portion 513b for cutting the sheet 502 in cooperation with the above.
The V-shaped blade portion 513b of the movable blade 513 has an edge formed by grinding, and guide protrusions 513c for maintaining a shearable positional relationship with the fixed blade 504 are formed at both ends of the V-shaped blade portion 513b. ing. The guide protrusion 513c is bent and bent upward. Also, the guide protrusion 513c
Has a gap between it and the fixed blade 504, and is configured so that the cutter first unit 503 can rotate about the cutter support shaft 501b as will be described later.

The state when the sheet cutting device shown in FIG. 10 cuts the sheet 502 will be described with reference to FIG. When a signal for cutting the sheet 502 is issued to the paper cutting device by a command from a control circuit (not shown), the rotation output shaft 508a of the motor 508 rotates and the transmission members such as the worm 509 and the worm wheel 510. The movable blade drive wheel 511 is rotated via. As the movable blade drive wheel 511 rotates, the drive pin 512 moves the movable blade 51.
3 in the direction of arrow c toward the fixed blade 504,
The sheet 502 is sheared and cut by the fixed blade 504 and the movable blade 513. Even after the sheet 502 is cut, the rotation output shaft 508a continues to rotate and stops when the movable blade 513 returns to the standby state shown in FIG.

The states of the movable blade 513 and the fixed blade 504 viewed from the direction of the arrow DD in FIG. 12 will be described with reference to FIG. When the movable blade 513 moves in the direction of arrow c from the standby state shown by the imaginary line as described above, the guide protrusion 513c rides on the fixed blade 504. Seat 50
The position of the movable blade 513 when the cutting of No. 2 is completed is the position moved by the distance S4 from the position in the standby state.

As described above, the movable blade 513 is shown in FIG.
A distance S4 from the position where a gap is provided between the guide protrusion 513c and the fixed blade 504 shown in FIG. 13 to the position shown in FIG.
Since the sheet is moved, the moving amount of the movable blade 513 is large, which makes the sheet cutting device large.

Referring to FIG. 14, the fixed blade 504 is replaced by the movable blade 5.
A state of separating from 13 will be described. When the sheet 502, which is a print medium, is attached to the printer 501 and the sheet cutting device, and when the sheet 502 attached to the printer 501 and the sheet cutting device removes the jamming when the jamming occurs, the cutter first unit Rotate 503 by 90 ° as shown by arrow d to move the fixed blade 50
4 is largely separated from the movable blade 513. In this way, the fixed blade 504 is largely separated from the movable blade 513, so that the sheet 502 is mounted on the printer 501 and the sheet cutting device, and the jammed sheet 502 is attached.
Will be easier to remove. In this way, the fixed blade 50
The reason why the movable blade 513 can be largely separated from the movable blade 513 is that the movable blade 513 is positioned so as not to interfere with the fixed blade 504 during standby before cutting the sheet 502.

[0012]

As described above,
Conventionally, when a sheet 502 which is a print medium is attached to a printer 501 and a paper cutting device,
1 and the sheet 502 attached to the sheet cutting device, when the jamming occurs, in order to easily remove the jamming, the cutter first unit 503 is moved as shown by an arrow d.
The fixed blade 504 was rotated by 0 ° so as to be largely separated from the movable blade 513. Therefore, the sheet 50 of the movable blade 513
In the standby state before cutting 2, the guide protrusion 513c provided on the movable blade 513 for maintaining the shearable positional relationship with the fixed blade 504 is separated so as not to interfere with the fixed blade 504. Had to be in a good position.
Therefore, the moving amount of the movable blade 513 becomes large, which makes the sheet cutting device large.

An object of the present invention is to obtain a small paper cutting device.

[0014]

In order to achieve the above object, in the present invention, a fixed blade having a straight blade portion formed in a straight shape and a sheet is cut by advancing and retracting with respect to the fixed blade. In a sheet cutting apparatus including a movable blade for doing, the movable blade has a guide protrusion for maintaining a shearable positional relationship with the fixed blade,
The fixed blade is characterized in that a cutout portion is formed so that the movable blade does not interfere with the guide protrusion of the movable blade when the movable blade is on standby.

Further, in the paper cutting device in which the fixed blade is configured to be opened and closed in a direction orthogonal to the movable blade, the movable blade maintains a shearable positional relationship with the fixed blade. In addition to having a guide protrusion, the fixed blade is formed with a notch that does not interfere with the guide protrusion of the movable blade when the movable blade is on standby.

Further, the notch portion is formed obliquely with respect to the straight blade portion.

The cutout portion is formed in a rectangular shape orthogonal to the straight blade portion.

Further, the movable blade has a V-shaped blade portion for cutting a sheet by advancing and retracting with respect to the fixed blade, and guide projections at both ends of the V-shaped blade portion. To do.

Further, the movable blade has an inclined blade portion for cutting a sheet by advancing and retreating with respect to the fixed blade, and a guide projection portion at one end of the inclined blade portion. To do.

Further, the guide protrusion is characterized in that a surface close to the V-shaped blade or the inclined blade is formed obliquely with respect to the straight blade.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings based on an embodiment. FIG. 1 is a main cross-sectional view showing a standby state of a configuration of a printer incorporating a sheet cutting device according to an embodiment. FIG. 2 is an explanatory view showing the states of the movable blade 13 and the fixed blade 4 as seen from the direction of the arrow AA shown in FIG. FIG. 3 is a cross-sectional view showing a state when the movable blade 13 cooperates with the fixed blade 4 to finish cutting the sheet 2. FIG. 4 is an explanatory view showing the states of the movable blade 13 and the fixed blade 4 as seen from the direction of the arrow BB shown in FIG. FIG. 5 is a cross-sectional view showing a state in which the cutter first unit 3 shown in FIG. 1 is rotated to largely separate the fixed blade 4 from the movable blade 13.

FIG. 6 is an explanatory view showing the states of the movable blade 113 and the fixed blade 104 when the sheet cutting apparatus in the second embodiment has finished cutting the sheet 102. FIG. 7 is an explanatory view showing the states of the movable blade 213 and the fixed blade 204 in the standby state of the third embodiment. FIG. 8 is an explanatory diagram showing the states of the movable blade 213 and the fixed blade 204 when the sheet cutting apparatus according to the third embodiment finishes cutting the sheet 202. In FIG. 9, the sheet cutting apparatus according to the fourth embodiment is a sheet 302.
It is explanatory drawing which shows the state of the movable blade 313 and the fixed blade 304 when cutting is completed.

With reference to FIG. 1, the outline of the configuration of the printer incorporating the sheet cutting device in the first embodiment in the standby state will be described. The printer 1 is provided with a print head 1a, and a cutter first unit 3 and a cutter second unit 6 which constitute a paper cutting device are incorporated. The cutter first unit 3 is rotatably attached by the cutter support shaft 1b, and the cutter second unit 6 is fixedly attached.

The cutter first unit 3 includes a platen 3a.
The fixed blade 4 and the sheet guide member 5 are attached, and the sheet 2 is mounted between the platen 3a and the print head 1a. The cutter second unit 6 has a skeleton composed of a first frame body 7a, a second frame body 7b, and an upper plate 7c, and the first frame body 7a has a motor 8 having a rotation output shaft 8a.
Is attached to the rotary output shaft 8a, and the worm wheel 10 is rotatably attached to the first frame 7a.
A movable blade drive wheel 11 is rotatably attached to the second frame 7b. The movable blade drive wheel 11 is meshed with a worm wheel 10 by a gear (not shown), and rotates with the rotation output shaft 8a. It is configured to rotate.

A drive pin 12 for reciprocating the movable blade 13 in the direction of the fixed blade 4 is fixed to the movable blade drive wheel 11, and the drive pin 12 is shown on the movable blade 13 in FIG. It is fitted in the drive hole 13a provided so as to exist. A movable blade pressing member 14 for elastically pressing the movable blade 13 against the fixed blade 4 when the movable blade 13 is in contact with the fixed blade 4 is attached to the upper plate 7c.

The states of the movable blade 13 and the fixed blade 4 viewed from the direction of the arrow AA shown in FIG. 1 will be described with reference to FIG. The movable blade 13 has a drive hole 1 for engaging with the drive pin 12.
3a and a V-shaped blade portion 13b for cutting the sheet 2 in cooperation with the fixed blade 4 are formed. The V-shaped blade portion 13b of the movable blade 13 has an edge formed by grinding.
Guide protrusions 13c for maintaining a shearable positional relationship with the fixed blade 4 are formed at both ends of the character blade portion 13b. The guide protrusion 13c is bent and bent upward. Fixed blade 4 for cutting the sheet 2 in cooperation with the movable blade 13
The straight blade portion 4a formed in a straight shape and the straight blade portion 4
At both ends of a, the straight blade portion 4 is provided so as not to interfere with the guide protrusion portion 13c at the time of standby and that the guide protrusion portion 13c of the movable blade 13 easily rides on the fixed blade 4.
A notch 4b formed obliquely with respect to a is provided, and an edge of the straight blade 4a is formed by grinding.

The state when the sheet cutting device shown in FIG. 1 cuts the sheet 2 will be described with reference to FIG. When a signal for cutting the sheet 2 is issued to the sheet cutting device according to a command from a control circuit (not shown), the rotation output shaft 8a of the motor 8 rotates, and the transmission members such as the worm 9 and the worm wheel 10 are rotated. The movable blade drive wheel 11 is rotated via. With the rotation of the movable blade drive wheel 11, the drive pin 12 moves the movable blade 13 toward the fixed blade 4, and the fixed blade 4 and the movable blade 13 shear and cut the sheet 2.
Even after the sheet 2 is cut, the rotary output shaft 8a continues to rotate and stops when the movable blade 13 returns to the standby state shown in FIG.

The states of the movable blade 13 and the fixed blade 4 viewed from the direction of the arrow BB shown in FIG. 3 will be described with reference to FIG. When the movable blade 13 moves in the direction of arrow a from the standby state shown by the imaginary line as described above, the guide protrusion 13c rides on the fixed blade 4. The movable blade 13 ends the cutting of the sheet 2 by moving the distance S1 from the standby position. The fixed blade 4 has a guide protrusion 13 of the movable blade 13 during standby.
Since the cutout portion 4b is formed so as not to interfere with the sheet c, the sheet 2 can be moved from the standby position of the movable blade 513.
The distance S1 to the position where the cutting is finished is smaller than the moving distance S4 of the movable blade 513 of the conventional example described above, and the sheet cutting apparatus can be downsized. Moreover, since both ends of the fixed blade 4 are formed obliquely, the movable blade 1
When 3 rides on the fixed blade 4, it moves smoothly.

A state in which the fixed blade 4 is separated from the movable blade 13 will be described with reference to FIG. When the sheet 2 which is the print medium is attached to the printer 1 and the paper cutting device,
In addition, when the sheet 1 mounted on the printer 1 and the sheet cutting device causes jamming when the jamming is to be removed, the cutter first unit 3 is moved as shown by arrow b.
Rotate the fixed blade 4 away from the movable blade 13 by rotating it. In this way, by separating the fixed blade 4 largely from the movable blade 13, it becomes easy to mount the sheet 2 on the printer 1 and the sheet cutting device and remove the jammed sheet 2. In the present embodiment, the fixed blade 4 is rotated to be largely separated from the movable blade 13. However, even if the movable blade 13 is rotated to be largely separated from the fixed blade 4, the fixed blade 4 is rotated. As in the case of separating the movable blade 13 from the movable blade 13, it becomes easy to attach the sheet 2 to the sheet cutting device and remove the jammed sheet 2.

The states of the movable blade 113 and the fixed blade 104 when the sheet cutting apparatus according to the second embodiment cuts the sheet 102 will be described with reference to FIG. In the first embodiment described above, the shape of the cutout portion 4b is formed obliquely with respect to the straight blade portion 4a, but in the second embodiment, the guide protrusion 113 is formed.
It is formed in a rectangular shape orthogonal to the straight blade portion 4a according to the shape of c. The shape of the notch 104b is used as the guide protrusion 1
By forming a rectangular shape according to the shape of 13c,
It is also possible to set the moving amount of the movable blade 113 from the standby position to the position where the cutting of the sheet 102 is finished to S2 which is smaller than the distance S1.

The states of the movable blade 213 and the fixed blade 204 in the standby state of the third embodiment will be described with reference to FIG. The third embodiment differs from the first embodiment described above in that it is adjacent to the V-shaped blade portion 213b of the guide protrusion 213c formed at both ends of the V-shaped blade portion 213b of the movable blade 213. That is, the end face is formed obliquely with respect to the straight blade portion 204a. In this way, the guide protrusion 21
The fixed blade 204 is formed by forming the end surface adjacent to the V-shaped blade portion 213b of 3c obliquely with respect to the straight blade portion 204a.
The movable blade 213 is fixed to the fixed blade 204 by adapting to the shape of the cutout portion 204b formed at both ends of the slant.
In addition to making it possible to move smoothly when getting on,
This is to keep the stroke of the movable blade 213 as small as possible.

The states of the movable blade 213 and the fixed blade 204 when the sheet cutting apparatus according to the third embodiment cuts the sheet 202 will be described with reference to FIG. The movable blade 213 is
When moving in the direction of arrow a from the standby state shown by the imaginary line as in the first embodiment, the guide protrusion 213c rides on the fixed blade 204. The movable blade 213 moves the distance S2 from the position in the standby state and ends the cutting of the sheet 202. The fixed blade 204 is formed with a cutout portion 204b so as not to interfere with the guide protrusion 213c of the movable blade 213 during standby, and both end portions of the fixed blade 204 are oblique to the straight blade portion 204a. Since it is formed, the movable blade 213 moves smoothly when riding on the fixed blade 204. In addition, since the inside of the guide protrusion 213c is formed obliquely, the distance S3 from the position in the standby state to the position at which the cutting of the sheet 202 is finished is the distance that the movable blade 13 of the first embodiment moves. It is smaller than S1 and, of course, the moving distance S4 of the movable blade 513 of the above-mentioned conventional example.
The size of the paper cutting device is much smaller than that of the paper cutting device.

The states of the movable blade 313 and the fixed blade 304 when the sheet cutting apparatus according to the fourth embodiment cuts the sheet 302 will be described with reference to FIG. The difference between the fourth embodiment and the third embodiment described above is that the movable blade 313 is formed with an inclined blade portion 313b, and the guide protrusion 31 is formed.
3c is formed only on one end. When the movable blade 313 moves in the direction of the arrow a from the standby state shown by the imaginary line as described above, the guide protrusion 313c.
Rides on the fixed blade 304. The movable blade 313 moves the distance S3 from the position in the standby state and ends the cutting of the sheet 302.

In the fourth embodiment, since the inclined blade portion 311b has a simple shape, grinding is easy and the cost can be kept low, but the same effects as those of the third embodiment described above can be obtained. . That is, similarly to the third embodiment, the fixed blade 304 is provided with the notch 304b so as not to interfere with the guide protrusion 313c of the movable blade 313 during standby.
Is formed obliquely with respect to the straight blade portion 304a, the distance S3 from the position in the standby state to the position where the cutting of the sheet 302 is completed is the movable blade 1 of the first embodiment described above.
3 is smaller than the moving distance S1 of the conventional example, and of course is much smaller than the moving distance S4 of the movable blade 513 of the conventional example described above, and the sheet cutting device can be further downsized.

[0035]

As described above, according to the present invention, the fixed blade according to the present invention is provided with the notch so as not to interfere with the guide projection of the movable blade during standby. The distances S1, S2, and S3 from the standby position to the position where the cutting of the sheet is completed are smaller than the moving distance S4 of the movable blade of the conventional example described above, and the sheet cutting apparatus can be downsized. .

[Brief description of drawings]

FIG. 1 is a main cross-sectional view showing a standby state of a configuration of a printer incorporating a sheet cutting device according to a first embodiment.

FIG. 2 is a movable blade 1 viewed from the direction of arrow AA shown in FIG.
It is explanatory drawing which shows the state of 3 and the fixed blade 4.

FIG. 3 is a cross-sectional view showing a state when the movable blade 13 cooperates with the fixed blade 4 to finish cutting the sheet 2.

4 is a movable blade 1 viewed from the direction of the arrow BB shown in FIG.
It is explanatory drawing which shows the state of 3 and the fixed blade 4.

5 is a cross-sectional view showing a state in which the cutter first unit 3 shown in FIG. 1 is rotated to largely separate the fixed blade 4 from the movable blade 13. FIG.

FIG. 6 illustrates a sheet cutting apparatus according to a second embodiment of the present invention.
It is explanatory drawing which shows the state of the movable blade 113 and the fixed blade 104 when cutting of 2 is complete | finished.

FIG. 7 is an explanatory view showing a state of a movable blade 213 and a fixed blade 204 in a standby state of the third embodiment.

FIG. 8 is a diagram illustrating a sheet cutting apparatus according to a third embodiment of the invention.
It is explanatory drawing which shows the state of the movable blade 213 and the fixed blade 204 when cutting of 2 is complete | finished.

FIG. 9 is a diagram illustrating a sheet cutting apparatus according to a fourth embodiment of the present invention.
It is explanatory drawing which shows the state of the movable blade 313 and the fixed blade 304 when cutting of 2 is completed.

FIG. 10 is a main cross-sectional view showing a standby state of the configuration of a printer incorporating a paper cutting device in a conventional example.

11 is an explanatory diagram showing a state of a movable blade 513 and a fixed blade 504 as seen from the direction of the arrow CC in FIG.

FIG. 12 is a cross-sectional view showing a state in which a movable blade 513 cooperates with a fixed blade 504 to cut the sheet 502.

13 is an explanatory diagram showing a state of a movable blade 513 and a fixed blade 504 as seen from the direction of the arrow DD in FIG.

14 is a cross-sectional view showing a state in which the cutter first unit 503 shown in FIG. 10 is rotated to largely separate the fixed blade 504 from the movable blade 513. FIG.

[Explanation of symbols]

1 printer 1a print head 1b cutter support shaft 2 sheets 3 cutter 1st unit 3a Platen 4, 104, 204 Fixed blade 4a, 104a, 204a Notch 4b, 104b, 204b Notch 5 Sheet guide member 6 cutter 2nd unit 7a First frame 7b Second frame 7c Upper plate 8 motor 8a rotating output shaft 9 worms 10 worm wheel 11 movable blade drive car 12 drive pins 13, 113, 213 movable blades Drive holes 13a, 113a, 213a 13b, 213b V-shaped blade 113b Inclined blade 13c, 113c, 213c Guide protrusion 14 Movable blade holder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Miyashita             2 6663 Funatsu, Kawaguchiko Town, Minamitsuru District, Yamanashi Prefecture               Kawaguchiko Precision Co., Ltd. F-term (reference) 2C058 AF51 LB09 LB17 LB22 LB24                       LB26                 3C027 JJ03 JJ04 JJ12 JJ18

Claims (7)

[Claims] 1. A sheet cutting apparatus comprising: a fixed blade having a straight blade formed in a straight shape; and a movable blade for cutting a sheet by advancing and retracting with respect to the fixed blade, wherein the movable blade is a movable blade. Has a guide protrusion for maintaining a shearable positional relationship with the fixed blade, and the fixed blade has a cutout portion that does not interfere with the guide protrusion of the movable blade when the movable blade is on standby. A paper cutting device characterized in that 2. A sheet cutting device in which the fixed blade is configured to be opened and closed in a direction orthogonal to the movable blade, the movable blade maintaining a shearable positional relationship with the fixed blade. 2. The sheet cutting apparatus according to claim 1, further comprising a guide protrusion, wherein the fixed blade is formed with a cutout portion that does not interfere with the guide protrusion of the movable blade when the movable blade is on standby. 3. The sheet cutting apparatus according to claim 1, wherein the cutout portion is formed obliquely with respect to the straight blade portion. 4. The sheet cutting apparatus according to claim 1, wherein the cutout portion is formed in a rectangular shape orthogonal to the straight blade portion. 5. The movable blade has a V-shaped blade portion for cutting a sheet by advancing and retracting with respect to the fixed blade, and guide protrusions at both ends of the V-shaped blade portion. The sheet cutting device according to claim 1 or 2. 6. The movable blade has an inclined blade portion for cutting a sheet by advancing and retracting with respect to the fixed blade, and a guide protrusion portion at one end of the inclined blade portion. The sheet cutting device according to claim 1 or 2. 7. The sheet cutting apparatus according to claim 3, wherein a surface of the guide protrusion that is close to the V-shaped blade portion or the inclined blade portion is formed obliquely with respect to the straight blade portion. apparatus.