JP2011161681A - Perforation forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a perforation forming apparatus having improved cutting easiness and preventing a formed image from being damaged by giving moderate visibility to the perforation. <P>SOLUTION: The perforation forming apparatus including a sewing machine blade 311 having a plurality of blades formed on the circumference thereof, and a shaft member 365 that rotatably holds the sewing machine blade 311 is configured to bring the plurality of blades in contact with the desired portion of a workpiece, then, rotate the sewing machine blade 311 as a disk-like cutter to form the perforation with a plurality of continuous recessed portions, on the workpiece. The perforation forming apparatus includes a shape varying means 367 configured to vary the shape of a part of or all of the recessed portions. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a perforation forming apparatus that forms perforations on a recording medium.

  Generally, it is mounted on an image recording apparatus or the like that forms an image on a short, long winding or twisted recording medium (recording paper, recording film, etc.), and is perforated at a desired position on the recording medium. There are known perforation forming devices for forming Such a perforation forming apparatus is provided with a disk-shaped sewing blade having a blade edge provided intermittently, and an anvil roller disposed to face the sewing blade so as to receive the sewing blade. A perforation is formed on the recording medium by bringing the perforating blade into contact with the recording medium conveyed between the perforating blade and the anvil roller.

  As a perforation forming apparatus mounted on an ink jet printer, for example, an apparatus described in Patent Document 1 is known. This apparatus has a star wheel (sewing blade) having a blade provided on the outer periphery and a discharge roller (anvil roller) that is driven to rotate, and sandwiches the recording medium to be conveyed between the star wheel and the discharge roller. . The pressure adjusting mechanism variably adjusts the force that presses the perforation blade against the recording medium, so that the perforation blade is used as a simple conveying means for the recording medium and the perforation forming means for forming the perforation on the recording medium. Switch between using the blade.

Japanese Patent Laid-Open No. 2003-25660

  In the perforation forming apparatus described in the above cited reference 1, perforations, that is, uniform cuts, are formed in the recording medium according to the width and length of the cutting edge of the perforating blade that pierces the recording medium and the interval between the cutting edges. The In such a conventional perforation forming apparatus, when the width of the formed perforation is narrow and the pitch is small, the perforation visibility is low, so that it is difficult to find the cut position when cutting. As a result, there is a problem that the user takes time to perform the work of cutting along the perforation. Also, in terms of ease of cutting, perforations with a narrow width and a small pitch are unlikely to trigger the beginning of cutting (cut), and cutting along the perforation fails when starting from a shifted position. There is a risk that.

  Conversely, when the perforation is wide and the pitch is large, the perforation is too conspicuous, and the image formed by the image recording device or the like before forming the perforation may be significantly damaged. Problems arise.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a perforation forming apparatus that achieves appropriate visibility in a perforation and realizes easy cutting and does not impair the formed image.

  An embodiment according to the present invention includes a disc-shaped cutter having a plurality of blades formed on a circumference, and a holding member that rotatably holds the disc-shaped cutter, and the plurality of blades are used as the workpiece. A perforation forming device that forms a perforation in which a plurality of recesses are continuous with the workpiece by rotating the disk-shaped blade by contacting the desired portion of the disk, and a part of the plurality of recesses Alternatively, the perforation forming apparatus is characterized by having a shape changing means for changing all shapes.

  According to the present invention, it is possible to provide a perforation forming apparatus that gives the perforation appropriate visibility and realizes easy cutting and does not impair the formed image.

FIG. 1 is a front view showing a schematic configuration of an image recording apparatus equipped with a perforation apparatus. FIG. 2 is a perspective view showing the entire perforation device. FIG. 3 is a perspective view showing a vertical perforation blade switching mechanism unit, a tracking mechanism unit, and a recording medium conveyance mechanism unit of the perforation apparatus. FIG. 4 is a left side view illustrating the vertical perforation blade switching mechanism, the tracking mechanism, and the recording medium transport mechanism of the perforation device. FIG. 5 is a top view showing the vertical sewing machine blade switching mechanism and the tracking mechanism. FIG. 6A is a diagram illustrating a state in which the vertical sewing machine blade is in contact with the recording medium in the first embodiment. FIG. 6B is a diagram illustrating a state in which the vertical sewing blade is separated from the recording medium in the first embodiment. FIG. 7A is a diagram illustrating vibrations in the Y direction of the vertical sewing blade holding mechanism and the vertical sewing blade in the first embodiment. FIG. 7B is a diagram illustrating a state in which the piezoelectric vibrator is most contracted in the vertical sewing blade holding mechanism unit in FIG. 7A. FIG. 7C is a diagram illustrating a state in which the piezoelectric vibrator is most extended in the vertical sewing blade holding mechanism unit in FIG. 7A. FIG. 8 is a diagram illustrating a perforation formed on a recording medium in the related art. FIG. 9A is a diagram illustrating a perforation formed on a recording medium in the first embodiment. FIG. 9B is a diagram illustrating a perforation formed on the recording medium in the first embodiment. FIG. 9C is a diagram illustrating a perforation formed on the recording medium in the first embodiment. FIG. 9D is an enlarged view of a perforation formed on the recording medium in the first embodiment. FIG. 10 is a diagram showing a schematic configuration of a vertical sewing blade in the second embodiment. FIG. 11A is a diagram illustrating a state in which the vertical sewing machine blade and the recording medium are in contact with each other by a mechanism that maintains the rotational position of the vertical sewing machine blade during standby in the second embodiment. FIG. 11B is a diagram illustrating a state in which the vertical sewing machine blade is separated from the recording medium and rotated by inertia in the second embodiment. FIG. 11C is a diagram illustrating a state in which the position of the vertical sewing blade is detected and stopped at a predetermined position in the second embodiment. FIG. 12 is a diagram illustrating a perforation formed on a recording medium in the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the configuration and operation of the image recording apparatus 1 equipped with the perforation apparatus 300 of the present invention will be described with reference to FIG.

The image recording apparatus 1 includes a feeding unit 2 that pulls out and feeds a recording medium 6 such as a long recording paper or a recording film that is wound and loaded; an image recording unit 3 that forms an image on the recording medium 6; A perforation device 300 that forms perforations in the recording medium 6, a cutter device 4 that cuts the recording medium 6, and a discharge unit 5 having a transport path for discharging the cut medium, that is, the cut medium. Yes. The image recording unit 3 includes a transport mechanism 11 that transports the recording medium 6, head units 50 and 60 that are disposed in the transport path and record images on the recording medium 6, and cleaning units 70 and 80. ing. The image recording unit 3, the perforation device 300, the cutter device 4, and a part of the discharge unit 5 are accommodated in the apparatus main body frame 10.
These components are controlled by a control unit (not shown) equipped with an arithmetic processing unit such as a personal computer or a CPU. This control unit has a memory for storing necessary programs and data. It also has an interface function for receiving and capturing image data output by an external device and various output signals. First, the above-described components of the image recording apparatus 1 will be described.

The feeding unit 2 includes, for example, a recording medium 6 that is a continuous recording medium such as a rolled paper roll, a paper tube fixing shaft 7 on which the recording medium 6 is loaded, and a stand that rotatably supports the paper tube fixing shaft 7. 8 and a brake 9 for braking the supply speed of the recording medium 6.
The stand 8 supports the paper tube fixing shaft 7 rotatably. The paper tube fixing shaft 7 is provided with a plurality of claws, which are pushed out by injecting air from an air inlet (not shown) and project in the radial direction. These claw portions bite into the inner diameter surface of the paper tube of the recording medium 6 to hold the recording medium 6.
A brake 9 is connected to the paper tube fixing shaft 7 via a belt shown in FIG. The brake 9 generates reverse tension (back tension) in the direction opposite to the conveyance direction of the recording medium 6 (direction indicated by the arrow A). The brake 9 adjusts the back tension according to the remaining amount of the recording medium 6 detected by a medium remaining amount detection mechanism (not shown).

  With such a configuration, the feeding unit 2 feeds and supplies the recording medium 6 according to the rotation of the first drum 30 and the second drum 40 in the transport mechanism 11 described later.

The image recording unit 3 includes a transport mechanism 11 including first and second drums 30 and 40, first and second head units 50 and 60, and first and second heads that perform maintenance of the head units 50 and 60, respectively. Second cleaning units 70 and 80 are included.
The first head unit 50 is provided so as to be along the outer peripheral surface of the first drum 30, and the second head unit 60 is opposed to be along the outer peripheral surface of the second drum 40. Is provided. The first and second head units 50 and 60 form images by ejecting ink onto the transported recording medium 6.

  The first head unit 50 includes, for example, a head unit 51 (51a, 51b, 51c, 51d) that ejects ink of a total of four colors, cyan (C), black (K), magenta (M), and yellow (Y). It is comprised by. Each head unit 51 has a width equal to or larger than the width of the recording medium 6 and is held by a head holding plate (not shown). Then, ink is ejected from the nozzles of each head unit 51 onto the recording medium 6 conveyed by the first drum 30 to perform image recording. Here, as the first head unit 50, short recording heads less than the width of the recording medium 6 are staggered, that is, staggered so as to exceed the width of the recording medium 6, and can move up and down (not shown). Is held by the head holding plate. Since the second head unit 60 is also configured in the same manner as the first head unit 50, detailed description thereof is omitted.

  The first cleaning unit 70 is provided to face the outer peripheral surface of the first drum 30, and the second cleaning unit 80 is provided to face the outer peripheral surface of the second drum 40. The first and second cleaning units 70 and 80 perform cleaning of the first and second head units 50 and 60, respectively. More specifically, the first and second cleaning units 70 and 80 have known cleaning mechanisms (not shown) such as wipe blades and suction mechanisms corresponding to the head units 51.

  FIG. 1 shows a state in which the first and second head units 50 and 60 are arranged at positions (image recording positions) where images are recorded. At this time, the first and second cleaning units 70 and 80 are disposed in the vicinity of the first and second head portions 50 and 60, respectively.

Hereinafter, the cleaning operation of the first and second head units 50 and 60 by the first and second cleaning units 70 and 80 will be briefly described.
In the case where the first head unit 50 is cleaned by the first cleaning unit 70, first, the first head unit 50 is raised by an elevating mechanism (not shown) and separated from the first drum 30. By this separation, a space is formed between the outer peripheral surface of the first drum 30 and the first head unit 50. Next, the first cleaning unit 70 is rotated in the formed space so as to face the first head unit 50 (cleaning processing position). Then, the first cleaning unit 70 performs a cleaning process for the first head unit 50. When the cleaning process is completed, the first cleaning unit 70 is retracted, and then the first head unit 50 is lowered and returned to the image recording position shown in FIG. The second cleaning unit 80 is also configured in the same manner as the first cleaning unit 70, and thus detailed description thereof is omitted.

The transport mechanism 11 includes a plurality of transport free rollers 12 to 18, 20 to 23, a tension roller 19, a first drum 30, and a second drum 40.
The transport mechanism 11 is configured so that the recording medium 6 supplied from the feeding unit 2 is moved in order from the upstream side to the downstream side, the free rollers 12 and 13, the first drum 30, the free rollers 14 to 16, and the second rollers. It is conveyed to the drum 40, free rollers 17, 18, tension roller 19, and free rollers 20-23. During this conveyance, an image is recorded on the first surface (for example, the front surface side) of the recording medium 6 by the first head unit 50, and then the second surface (for example, the second surface of the recording medium 6 by the second head unit 60). Record the image on the back side. Thus, the recording medium 6 on which an image is recorded on one side or both sides is sent out to the perforation device 300.

Hereinafter, the conveyance of the recording medium 6 in the image recording unit 3 will be described in detail.
The recording medium 6 sent out from the feeding unit 2 is first transported to the first drum 30 via the free rollers 12 and 13. The recording medium 6 is wound around the first drum 30 by the free rollers 13 and 14. The free rollers 12 to 14 and the rotation shaft 30 a of the first drum 30 are rotatably supported by the apparatus main body frame 10.

  The recording medium 6 is wound around the first drum 30 by the free rollers 13 and 14 at a winding angle of, for example, 330 degrees. As described above, the recording medium 6 has a configuration in which the wrapping angle of the recording medium 6 around the first drum 30 is widely secured, so that the recording medium 6 has the first drum 30 due to the tension at the start of winding and the tension at the end of winding. A normal force is applied to the outer peripheral surface of 30. Thus, the frictional resistance between the first drum 30 and the recording medium 6 is increased, and the recording medium 6 is moved to the first drum 30 without causing a slip between the first drum 30 and the recording medium 6. Hold tightly. In this way, accurate recording medium conveyance and drum rotation speed control are achieved.

  The first drum 30 is a driven drum that does not include a drive motor and rotates with the rotation of the second drum 40 via the continuous medium 5. After the end of winding of the first drum 30, the recording medium 6 is conveyed to the second drum 40 via the free rollers 15 and 16. The recording medium 6 is wound around the second drum 40 by the free rollers 16 and 17. The free rollers 15 to 17 and the rotation shaft 40 a of the second drum 40 are rotatably supported by the apparatus main body frame 10.

  As with the first drum 30, the recording medium 6 is wound around the second drum 40 at a winding angle of 330 degrees, for example. Thus, the frictional resistance between the second drum 40 and the recording medium 6 is increased, and the recording medium 6 becomes the second drum 40 without slipping between the second drum 40 and the recording medium 6. Hold tightly.

  The recording medium 6 held on the second drum 40 is conveyed by a drive motor 41 connected to the rotating shaft 40a of the second drum 40 via a belt. Therefore, the second drum 40 at the most downstream side becomes a drive drum.

  An encoder 42 in the position detection unit is connected to the rotation shaft 40 a of the second drum 40. Accordingly, the encoder 42 outputs a pulse signal corresponding to the rotational position of the second drum 40 in conjunction with the rotation of the second drum 40. The pulse signal output from the encoder 42 is input to a drive substrate (not shown) that drives the recording heads of the first and second head portions 50 and 60, and each recording head is synchronized with the pulse signal. Is discharged.

  Thus, since the recording medium 6 is conveyed at a synchronized speed without causing slippage on the first and second drums 30 and 40, the recording medium 6 generates a pulse signal output along with the rotation of the second drum 40. Based on this, the ejection drive of the first and second head units 50 and 60 can be controlled.

  Here, the first drum 30 and the second drum 40 are arranged so as to overlap at least partially with respect to the direction of gravity, that is, the Z-axis direction. Such an arrangement makes it possible to reduce the area occupied by the device when installed.

  After the end of winding of the second drum 40, the recording medium 6 is conveyed to the perforation device 300 via the free roller 18, the tension roller 19, and the free rollers 20 to 23.

  A drive motor 24 is connected to the tension roller 19 via a belt. By driving the drive motor 24, the tension roller 19 rotates. Thereby, the tension roller 19 can apply a necessary tension to the recording medium 6 to prevent the recording medium 6 from slipping after the end of winding of the second drum 40.

  The perforation apparatus 300 forms a perforation on the recording medium 6 to be conveyed. Then, the recording medium 6 on which the perforations are formed is conveyed to the cutter device 4. Details of the perforation device 300 will be described later.

The cutter device 4 includes a nip roller pair 90 and a cutter roller pair 91.
The nip roller pair 90 is rotatably supported on the apparatus main body frame 10. A drive motor 92 is connected to one roller of the nip roller pair 90. By driving the drive motor 92, the nip roller pair 90 rotates and conveys the recording medium 6 to the cutter roller pair 91.
The cutter roller pair 91 includes a cutter roller 91a to which at least one cutting blade 93 for cutting the recording medium 6 is attached, and an anvil roller 91b provided to face the cutter roller 91a at a predetermined interval. And is constituted by. The cutter roller 91a and the anvil roller 91b are rotated in the arrow direction indicated by the cutter roller pair 91 by a motor (not shown). By this rotation, the cutting blade 93 of the cutter roller 91a comes into contact with the recording medium 6 sent from the nip roller pair 90 and cuts the recording medium 6 into a predetermined size (hereinafter, cut into a predetermined size). The recorded recording medium is called a cut medium). Then, this cut medium is discharged to the discharge unit 5. The nip roller pair 90 and the cutter roller pair 91 are controlled so that the outer peripheral speeds are substantially equal to the conveyance speed of the recording medium 6 conveyed from the image recording unit 3.

The discharge unit 5 includes a pair of conveyance guides 94 (94a, 94b), a pair of discharge rollers 95 (95a, 95b), and a discharge tray 96.
The conveyance guides 94a and 94b are provided below the cutter roller pair 91 so as to guide the cut medium to the discharge rollers 95a and 95b. The end of the conveyance guide 94b is disposed so as to abut on the outer peripheral surface of the anvil roller 91b or close to the recording medium 6 at a thinner interval. With such a configuration, even after the recording medium 6 is cut by the cutter roller pair 91, the leading end (cut surface) of the recording medium 6 is conveyed between the conveyance guides 94a and 94b without being caught by the anvil roller 91b. be able to.

  The cut medium sent to the discharge roller pair 95 is discharged to the discharge tray 96 by the rotation of the discharge rollers 95a and 95b. The discharge tray 96 stores the cut medium discharged by the discharge roller pair 95.

Next, the perforation device 300 will be described in detail.
The perforation device 300 is disposed on the conveyance path between the image recording unit 3 and the cutter device 4 in the conveyance path of the recording medium 6 and has a detachable unit type.

  As shown in FIG. 2, the perforation apparatus 300 includes a vertical perforation, that is, a vertical perforation blade switching mechanism 310 that forms a perforation parallel to the conveyance direction of the recording medium 6 on any page, and a vertical perforation blade. A tracking mechanism section 320 that moves (tracks) the switching mechanism section 310 in the width direction of the recording medium 6, a recording medium conveyance mechanism section 330 that conveys the recording medium 6, and a frame section 340 that integrally supports these members. And is constituted by. In the following, a perforation device 300 that forms vertical perforations will be described. However, the perforation device 300 is not limited to vertical perforations, and is a device that forms perforations in the width direction of the recording medium 6. It may be.

First, the frame unit 340 will be described.
As shown in FIG. 2, the frame portion 340 includes two side plates 341 and 342, two support round bars 343 and 344, and one support square bar 345.
The side plates 341 and 342 are connected to each other by support round bars 343 and 344 and one support square bar 345 so as to be parallel to each other. The vertical sewing machine blade switching mechanism 310, the tracking mechanism 320, and the recording medium transport mechanism 330 are accommodated between the side plates 341 and 342. The frame portion 340 is held on the apparatus main body frame 10 by two installation round bars 351 and 352.

Next, the recording medium transport mechanism 330 will be described.
As shown in FIG. 3, the recording medium conveyance mechanism unit 330 includes an anvil roller 331, an anvil roller drive motor 332, and a nip roller 333.

  The anvil roller 331 is rotatably supported by side plates 341 and 342 via a bearing (not shown), and is provided at a position facing a vertical sewing machine blade 311 described later. An anvil roller drive motor 332 is connected to one end of the anvil roller 331. The anvil roller drive motor 332 is held by the side plate 342 and rotates the anvil roller 331 so that the rotation speed of the outer peripheral surface of the anvil roller 331 is equal to the conveyance speed of the recording medium 6 conveyed from the image recording unit 3. . Thereby, the recording medium 6 can be conveyed downstream without reducing the conveying speed of the recording medium 6.

  The nip roller 333 is rotatably supported on the side plates 341 and 342 via bearings (not shown), and is provided at a position facing the anvil roller 331 in order to press the recording medium 6 against the anvil roller 331. As a result, the recording medium 6 is conveyed downstream by the rotation of the anvil roller 331 without generating chicks while being nipped by the anvil roller 331 and the nip roller 333.

As described above, the recording medium conveyance mechanism unit 330 conveys the recording medium 6 conveyed from the image recording unit 3 to the cutter device 4 at the same speed.
In the present embodiment, the recording medium 6 is wound around the anvil roller 331 with a winding angle of about 90 degrees. An anvil roller 331 is disposed so that the vertical sewing machine blade 311 contacts the recording medium 6 in the vicinity of the approximate center of the winding angle.

Next, the tracking mechanism unit 320 will be described.
As shown in FIGS. 2 to 5, the tracking mechanism unit 320 includes a slide table 321, an angle member 322, a slide rail 323, a tracking motor 324, and a folding belt mechanism 325.

  The slide rail 323 is fixed to the inner surface of the support square bar 345. Although not shown, the slide rail 323 is provided with a plurality of position sensors. The slide rail 323 is attached with a slide table 321 that can move in the Y-axis direction, that is, the width direction of the recording medium 6 via a ball screw (not shown).

The rotational driving force of the tracking motor 324 attached to the side plate 342 is transmitted to the ball screw via the folding belt mechanism 325 to move the slide table 321 in the Y axis direction with respect to the slide rail 323. That is, as shown in FIG. 5, the slide table 321 drives the tracking motor 324 in response to a notification from the control unit, and moves in the left-right direction in the figure. At this time, since the position of the slide table 321 is detected by a plurality of position sensors provided on the slide rail 323, the slide table 321 can be moved to an accurate position.
In addition, as shown in FIG. 5, an angle member 322 for holding a vertical sewing machine blade switching mechanism 310 described later is attached to the slide table 321.

  As described above, the tracking mechanism unit 320 can move the vertical sewing machine blade switching mechanism unit 310 in the width direction of the recording medium 6. That is, it is possible to form a perforation at an arbitrary position in the width direction of the recording medium 6 or to change the formation position of the perforation in the width direction of the recording medium 6 for each page. Furthermore, when performing continuous image recording, even if the recording medium 6 is slightly meandered in the width direction as the recording medium 6 is conveyed, the perforation formation position is made to follow the meandering of the recording medium 6. Can do. In this way, it is possible to always form the perforation while maintaining a constant position from the end in the width direction of the recording medium 6 regardless of the instability of the conveyance direction of the recording medium 6 in the width direction.

Next, the vertical sewing machine blade switching mechanism 310 will be described.
As shown in FIGS. 4 and 5, the vertical sewing blade switching mechanism 310 includes a vertical sewing blade 311 that is a disc-shaped blade having a plurality of blades formed on the circumference (outer periphery), a cam 312, and a link bar. 313, a cam follower 314, a mounting plate 315 as a base member, a cam drive motor 316, a spring 318 as a biasing member, a first connection member 353, a second connection member 354, and a fine adjustment mechanism And a micrometer 355.

  The vertical sewing blade 311 is rotatably held at one end of the link bar 313 via a bearing (not shown) so as to face the anvil roller 331. The perforation device 300 has a vertical perforation blade 311, which is a disk-shaped blade having a plurality of blades formed on the circumference, in contact with a desired portion of the recording medium 6, and a plurality of recesses are formed on the moving recording medium 6. Forms a continuous perforation. Here, there is no drive source for rotating the vertical sewing blade 311, and the vertical sewing blade 311 rotates following the conveyance of the recording medium 6 when abutting. The cam follower 314 is fixed to the other end of the link bar 313 so as to face the cam 312.

  The link bar 313 is attached to the attachment plate 315 so as to be rotatable with respect to the attachment plate 315 around the link fulcrum 317. The link bar 313 is urged so that the cam follower 314 is always in contact with the cam 312 by a spring 318 having one end attached to the attachment plate 315.

  The cam 312 is attached to the attachment plate 315, and has two radii each having a different radius, ie, a radius A part and a radius B part, that is, a small radius A and a large radius B. In FIG. 6A and FIG. 6B, for the sake of clarity, the radius A and the radius B of the cam 312 are shown to be greatly different and form a step, but in practice, the switching portion of the different radius is smooth. It is connected. As described above, the cam 312 is in contact with the cam follower 314, and the position of the vertical perforation blade 311 is a perforation forming position for forming a perforation on the recording medium 6 via the link bar 313 (FIG. 6A). ) And the retracted position (FIG. 6B) retracted from the perforation forming position.

  The first connecting member 353 is disposed at the upper end of the mounting plate 315, and the mounting plate 315 can be rotated only in the in-plane direction of the mounting plate 315 with respect to the angle member 322. Are connected to the tracking mechanism 320 (angle member 322). The second connection member 354 is disposed at the lower end of the attachment plate 315, and fixes the rotation position of the attachment plate 315 with respect to the tracking mechanism portion 320 (angle member 322) at a desired position. That is, it is a member for securely fixing the angle member 322 and the mounting plate 315.

  Further, a micrometer 355 as a fine adjustment mechanism is embedded in the angle member 322, and the linear motion spindle 357 is in contact with the mounting plate 315. The micrometer 355 is arranged so that the rotation center of the vertical sewing machine blade 311 is positioned on the extension line of the linear movement spindle 357 in the straight direction when the knob portion 356 is rotated. The micrometer 355 moves the attachment plate 315 around the first connection member 353.

  Although not shown, a shaft having a slit and a photo interrupter are provided on the opposite side of the cam drive motor 316 from the cam 312, and the controller detects the phase of the cam drive motor 316. Yes.

Next, a variable operation of the position of the vertical sewing machine blade 311 by the cam / link mechanism including the cam 312, the link bar 313 and the cam follower 314 will be described.
As described above, the vertical sewing machine blade 311 is held at one end of the link bar 313 having the link fulcrum 317 at the center via a bearing. A cam follower 314 is disposed at the other end of the link bar 313. The cam follower 314 is in contact with a cam 312 driven by a cam drive motor 316. When the cam 312 is rotated by the cam drive motor 316, the portion where the cam 312 and the cam follower 314 are in contact changes. That is, the cam follower 314 contacts the radius A portion of the cam 312 or the radius B portion of the cam 312.

  The cam follower 314 moves linearly between the positions corresponding to the radius A and the radius B with an amplitude equal to the diameter difference between the radius A and the radius B. This linear motion is transmitted to the vertical sewing machine blade 311 via the link bar 313, and the vertical sewing machine blade 311 moves in the same manner. That is, the diameter difference between the radius A and the radius B of the cam 312 is converted into the linear motion of the vertical sewing machine blade 311 via the cam / link mechanism.

  Therefore, when the cam follower 314 is in contact with the radius A portion of the cam 312, the vertical perforation blade 311 is pressed against the recording medium 6 to form a perforation as shown in FIG. 6A. At this time, the vertical sewing blade 311 rotates following the conveyance of the recording medium 6. When the cam follower 314 is in contact with the radius B portion of the cam 312, the vertical sewing blade 311 is retracted to a position where the perforation cannot be formed on the recording medium 6 as shown in FIG. 6B. Since the link mechanism is 1: 1, the retraction amount of the vertical sewing blade at the retraction position in FIG. 6B is equal to the difference between the radius A and the radius B of the cam 312. The retraction amount, that is, the diameter difference between the radius A and the radius B of the cam 312 is considered to be appropriate as an amount obtained by adding an appropriate margin to the thickness of the recording medium 6. Yes.

  Thus, by rotating the cam 312, the position of the vertical sewing blade 311 is pressed against the recording medium 6 to form a perforation on the recording medium 6, and retracted from the recording medium 6. Thus, the recording medium 6 is switched to a retreat position where no perforation is formed.

By the vertical perforation blade switching mechanism 310 described above, an operation of freely setting a perforated page such that a perforation is formed only on an arbitrary page of the recording medium 6 and a perforation is not formed on other pages. Is possible.
In the above description, one tracking mechanism unit 320 provided with the vertical sewing machine blade switching mechanism unit 310 is provided on each of the left and right sides in the width direction of the recording medium. It is sufficient to provide the necessary number corresponding to the perforations to be formed.

  Next, the configuration of the vertical sewing blade holding mechanism 360 that holds the vertical sewing blade 311 in the first embodiment will be described with reference to FIGS. 7A to 7C. 7A to 7C are omitted in FIGS. 2 to 6 except for the vertical sewing machine blade 311 and the link bar 313 for the sake of simplicity, the vertical sewing machine blade holding mechanism 360 is not shown. The entirety abuts or separates from the recording medium 6 by the above-described cam link mechanism.

  The vertical sewing blade holding mechanism 360 includes the vertical sewing blade 311 described above, a plurality of stays 361 and 362, holding plates 363 and 364, a shaft member 365 that holds the vertical sewing blade 311, a bearing 366, and piezoelectric vibration. A child 367 and a joint 368 are included. The vertical sewing machine blade holding mechanism 360 also has a vibration control unit (not shown) for controlling the vibration (size, time, etc.) of the piezoelectric vibrator 367, which is a shape changing means. The piezoelectric vibrator 367 and the vibration control unit serve as means for changing the shape of some or all of the plurality of recesses formed on the recording medium.

  One end side of each of the plurality of stays 361 is fixed to the link bar 313 perpendicularly, and the other end side of each of the stays 361 is fixed to one surface of the holding plate 363 perpendicularly. One end side of each of the plurality of further stays 362 is fixed perpendicularly to the other surface of the holding plate 363, and the other end side of each stay 362 is perpendicular to one surface of the holding plate 364. It is fixed to. That is, the link bar 313 and the holding plates 363 and 364 are held in parallel at predetermined intervals by the stays 361 and 362.

  The shaft member 365 is rotatably held via bearings 366 fixed to the holding plates 363 and 364, respectively. The shaft member 365 passes through the center of the disk-shaped vertical sewing blade 311 and is fixed thereto. That is, the vertical sewing machine blade 311 is fixed to the shaft member 365 between the holding plates 363 and 364, and can be rotated together with the shaft member 365.

  A piezoelectric vibrator 367 is fixed to the link bar 313. The piezoelectric vibrator 367 and the shaft member 365 are connected by a joint 368. That is, the piezoelectric vibrator 367 is connected to the vertical sewing machine blade 311 fixed to the shaft member 365 through the joint 368. The joint 368 is formed of a thrust bearing, and the shaft member 365 is rotatably held with respect to the piezoelectric vibrator 367 fixed to the link bar 313, and the shaft member 365 is moved in the axial direction (Y direction). The shaft member 365 and the piezoelectric vibrator 367 are engaged with each other so that there is no rattling.

  The piezoelectric vibrator 367 is a piezoelectric body and has a characteristic that the dimension (thickness) of the shaft member 365 in the axial direction (the −Y direction in FIGS. 7A to 7C) changes in proportion to the applied voltage. The piezoelectric body has a multi-layer structure, and its thickness changes in proportion to the applied voltage. In general, when a voltage of 0 V to a maximum of about 200 V is applied to a piezoelectric body having a diameter of 20 mm and a height of 60 mm, the thickness changes from about 3 μm to about 200 μm. If the voltage to be applied is maintained, the thickness is maintained. Further, if the voltage to be applied is periodically changed, the thickness of the piezoelectric body is changed in a cycle corresponding to the cycle, and vibration along the axial direction of the shaft member 365 is generated. Thus, driving with a period of several hundred kHz is possible. The voltage applied to the piezoelectric vibrator 367 in order to generate vibration may be either an alternating current (for example, a sine wave), a binary rectangular wave (pulse wave), or a triangular wave that varies periodically. Further, by applying an arbitrary voltage (DC bias voltage) before the vibration is generated, the reference position (the center position of the amplitude) at the start of the amplitude or at the time of the amplitude can be moved.

  FIG. 7A shows that when the piezoelectric vibrator 367 is vibrated at a predetermined frequency, the vertical sewing machine blade 311 and the shaft member 365 are integrated with the position of the one-dot chain line in accordance with the movement of the piezoelectric vibrator 367. It is a figure which shows moving between the positions drawn with the continuous line. FIG. 7B is a diagram showing a reduced state in which the voltage applied to the piezoelectric vibrator 367 is 0 V and the thickness of the piezoelectric vibrator 367 is the thinnest. FIG. 7C is a diagram showing an extended state in which the voltage applied to the piezoelectric vibrator 367 is the maximum and the thickness of the piezoelectric vibrator 367 is the largest.

  The interval between the plurality of blades provided on the outer periphery of the vertical sewing blade 311 is set to about 1 mm, for example. That is, the vertical sewing machine blade 311 is provided with a blade with a period of about 1 mm, and the portion with the blade is set to about 0.5 mm, which is a half. When the recording medium 6 is conveyed in the X direction at 500 mm / sec, the time required to advance 1 mm is 1/500 sec, that is, 0.002 sec. If the frequency of the voltage applied to the piezoelectric vibrator 367 is set to 10 kHz, for example, the vertical sewing blade 311 can be reciprocated 20 times in 0.002 seconds. If the diameter of the vertical sewing machine blade 311 is set to 24 mm, the thickness of the recording medium 6 is 100 μm, and the blade pierces the recording medium 6 to a depth of 90 μm, the number of blades pierced at the same time is 2 to 3 blades. is there. Accordingly, when the piezoelectric vibrator 367 is vibrated for 0.002 seconds, the shape of the perforation of the portion of the two or three blades piercing the recording medium 6 changes in response to the change in the thickness of the piezoelectric vibrator 367. become.

  The width of the cutting edge of the vertical sewing machine blade 311 is, for example, 0.2 mm. In this case, the 0.2 mm portion is pierced into the recording medium 6 by crushing it by, for example, about 90 μm. When the blade is pulled out, the recording medium 6 tries to return to the original shape. Therefore, when the recording medium 6 returns 0.1 mm in the width direction, the remaining perforation having a width of 0.1 mm is formed. For example, when the piezoelectric vibrator 367 is vibrated by 200 μm width by applying a voltage from 0 V to a maximum of 200 V, the perforation spreads by 0.2 mm to 0.3 mm. When a voltage of 0 V to 100 V is applied, the vertical perforation blade 311 vibrates with a width of 100 μm in proportion to the voltage, and the perforation spreads 0.1 mm to 0.2 mm. Thus, by controlling the voltage applied to the piezoelectric vibrator 367, the width of the perforation can be controlled.

  Furthermore, the length of the portion where the width of the perforation is changed can be controlled in accordance with the time during which the piezoelectric vibrator 367 is vibrated. For example, when the perforation is formed with a width of 0.3 mm over the entire length, a voltage is continuously applied from 0 V to 200 V until the vertical sewing blade 311 comes into contact with the recording medium 6 and then leaves. What is necessary is just to continue driving at 10 kHz. When the perforation is formed with a width of 0.2 mm over the entire length, a voltage is continuously applied from 0 V to 100 V until the vertical sewing blade 311 comes into contact with the recording medium 6 and is separated from the recording medium 6. What is necessary is just to continue driving at 10 kHz. When the perforation is formed in a portion where no image is recorded on the recording medium, it is also useful to control the length of the portion where the width of the perforation is changed in this way.

  In the perforation forming apparatus of the first embodiment, when the width of the perforation to be formed is partially changed, the piezoelectric vibrator 367 may be driven only at the timing when the width is desired to be changed. Hereinafter, the perforations formed on the recording medium by the perforation forming apparatus of the first embodiment will be described.

  FIG. 8 shows a first shape perforation 370 that is uniformly formed according to the width of the vertical perforation blade 311 in the prior art. A solid line 373 indicates a horizontal cut position, that is, a position where the recording medium 6 is finally cut by the cutter device 4 mounted on the image recording apparatus 1 shown in FIG. 9A to 9C show perforations formed by driving the piezoelectric vibrator 367 in order to partially change the width of the perforations. 9A to 9C show the same recording medium on which three kinds of perforations are formed. The upper perforation is shown in FIG. 9A and the middle perforation is shown in FIG. 9B. The perforation will be described with reference to FIG. 9C.

  A perforation 371 having a second shape shown in FIG. 9A is formed when the piezoelectric vibrator 367 is vibrated for 0.002 seconds with an amplitude of 200 V that is ± 100 V with 100 V as the center (reference position). It is. The third shape perforation 372 is a perforation formed when the piezoelectric vibrator 367 is vibrated for 0.002 seconds with an amplitude of 100 V that is ± 50 V with 100 V as the center (reference position). . Here, the second shape perforation 371 is provided at a position adjacent to the lateral cut position 373. That is, the piezoelectric vibrator 367 is driven under the above-described conditions immediately after the vertical sewing blade 311 comes into contact with the recording medium 6 and immediately before it is separated.

  Further, two perforations 372 having the third shape are arranged at equal intervals between the perforations 371 having the second shape. The second shape perforation 371 has a width of 0.3 mm and thus has high visibility. Further, since the recording medium 6 is crushed over a wide width, it is weaker in strength than the first shape perforation 370. The cutter device 4 mounted on the image recording apparatus 1 is arranged so that the second shape perforations 371 are arranged at both ends of the cut medium after being cut by the cutter device 4. Disconnect. Since the cut medium thus obtained has high visibility, it is clear to the user where to cut the cut medium, and both ends that start cutting are weak in strength, so the cut medium may be damaged. It is easy to start cutting along the perforation.

  In addition, by arranging the third shape perforations 372 between the first shape perforations 371 at equal intervals, the perforation visibility is further enhanced. If the width of the perforations at both ends of the recording medium is widened, the user may not be able to easily perceive the perforations and may have to search for them. By forming several, the user can easily perforate.

  In many cases, an image including a photograph or a character is recorded at a position where a perforation is to be formed on the recording medium 6. In such a case, if the perforation is too conspicuous, the user is prevented from seeing the image before cutting. However, as described above, the first perforation 370 having a narrow width occupies most of the entire perforation, and the second perforation 371 having high visibility is arranged at the cutting start position. By disposing the third shape perforation 372 with improved visibility, it is possible to prevent a great hindrance in viewing the recorded image as a whole.

  In addition, since most of the portion is constituted by the first perforations 370 having a narrow width, most of the portion is strong in strength. Thus, it is possible to prevent the perforation from being cut against the user's intention due to careless handling.

  FIG. 9B is an example in which perforations are formed only in a part of the cut medium cut at the horizontal cut position 373. The perforation having a relatively short length has low visibility, but in the case of this embodiment, the third shape perforation 372 is appropriately arranged so that the visibility can be appropriately increased according to the length. can do.

  FIG. 9C shows a configuration in which a second shape perforation 371 is partially arranged on the first shape perforation 370 for the purpose of easy cutting and improved visibility. The second shape perforation 371 is wider toward one side of the recording medium 6 with respect to the position of the first shape perforation 370. In the first shape perforation 370, the voltage applied to the piezoelectric vibrator 367 is set to 0V, and in the second shape perforation 371, the voltage is oscillated from 0V to 200V in only one direction. It is possible to widen the width.

  FIG. 9D is an enlarged view of the perforation shown in FIG. 9C. The one-point difference line indicates the center line of the first shape perforation 370. Using this center line as a reference, the perforation recesses are formed so that the three perforations adjacent to the lateral cut position 373 are wide on one side (right side in FIG. 9D). Among these three concave portions, the central concave portion is formed by completely piercing the recording medium 6 with the cutting edge of the vertical sewing blade 311, but the upper and lower concave portions are formed by piercing only a part of the cutting edge. As a result, only a part of the perforation recesses is wide.

  In order to increase the width of the perforation in the opposite direction, a voltage of 200 V is applied when the first shape perforation 370 is formed, and a voltage of 0 to 200 V is formed when the second shape perforation 371 is formed. You just have to vibrate. When forming the second shape perforation 371 that is equal to the left and right with respect to the first shape perforation 370, 100V is applied to form the first shape perforation 370, and the second shape perforation 370 is applied. When the eyes 371 are formed, the piezoelectric vibrator 367 may be vibrated at 0 to 200V. In this way, the relative position of the perforation can be changed by applying a voltage.

  In the case of FIG. 9C, the second shape perforation 371 is widened on the −Y direction side. When forming a perforation, if any region is discarded with the perforation interposed therebetween, it is preferable to increase the width of the perforation toward the discarded region. For example, when a user cuts out an envelope and sends it back, it is better to have a smoother edge on the side used as the envelope. In such a case, the perforation can be specified not to be used as an envelope, but to the opposite side. That is, if the direction of widening the perforation is widened in one direction with respect to the narrow perforation, and the widening direction is set to be widened toward the recording medium side, the perforation edge on the side to be used When it is cut off, it can have a smooth finish.

  In the first embodiment described above, the means including the piezoelectric vibrator is shown as the means for changing the perforation shape, but not only an electrostrictive vibrator such as a crystal vibrator or a ceramic vibrator but also an appropriate one. A perforation can be formed using an ultrasonic transducer, a magnetostrictive transducer, or the like.

Next, a second embodiment will be described. Hereinafter, differences from the first embodiment will be mainly described.
A vertical sewing blade 380 shown in FIG. 10 corresponds to the vertical sewing blade 311 of the first embodiment. The vertical sewing blade 380 has a cutting edge portion equivalent to the vertical sewing blade 311 and a cutting edge portion having a different width and length on the outer periphery thereof. More specifically, the length of the vertical sewing machine blade 311 that is the same as that of the vertical sewing machine blade 311 with three blades removed at 120 degree intervals on the outer periphery, that is, the length in the rotational direction of the vertical sewing machine blade and the width in the direction orthogonal to the rotational direction. A first blade 381 in which a constant blade is continuously formed, and a second blade 382 fitted in the deleted portion and having a length or width different from the length or width of the first blade However, they are coaxially fixed with screws to constitute one vertical sewing machine blade 380. As described above, the cutting edge of the first blade 381 is 0.2 mm, for example, but the cutting edge of the second blade 382 is configured to have a width of 0.4 mm, for example. Further, the interval between the blades of the first blade 381 is, for example, about 1 mm cycle, and the length of the blade portion therein is half of 0.5 mm, but the length of the blade of the second blade 382 is For example, 1.5 mm. In addition, although the case where the length and width of the 1st and 2nd blades differ is demonstrated here, only the length of the 1st and 2nd blades or only the width may differ.

  In the second embodiment, unlike the first embodiment, the vertical sewing blade holding mechanism 360 including the piezoelectric vibrator 367 and the piezoelectric vibrator controller is not used. As shown in FIGS. 11A to 11C, the vertical sewing blade 380 is rotatably held around an axis (not shown) fixed to a link bar 313 that is a holding member. The point that the vertical sewing blade 380 is brought into contact with and separated from the recording medium 6 by the cam / link mechanism including the cam 312, the link bar 313, and the cam follower 314 is the same as in the first embodiment.

  Further, in the second embodiment, a stopper 383 and a plunger 384 arranged in the vicinity of the vertical sewing blade 380 are provided as means for positioning and stopping the vertical sewing blade 380. The stopper 383 is an electromagnetic solenoid. When the stopper 383 is driven, the plunger 384 is pulled in the Z direction. When the driving is stopped, the plunger 384 is pulled out in the −Z direction by the force of a spring (not shown). A rubber member is provided at the tip of the plunger 384, and when the driving of the plunger 384 is stopped and pulled out in the −Z direction, this rubber member comes into contact with the cutting edge of the vertical sewing machine blade 380.

  A reflective blade position detection sensor 385 is disposed in the vicinity of the blade edge of the vertical sewing blade 380. The blade position detection sensor 385 identifies the positions of the first blade 381 and the second blade 382 based on the difference in reflected light.

  As shown in FIG. 11A, when the vertical sewing blade 380 is in contact with the recording medium 6, the vertical sewing blade 380 is rotated by the recording medium 6 and rotated. Further, as shown in FIG. 11B, the vertical sewing blade 380 continues to rotate due to inertia even immediately after being separated from the recording medium 6. When the blade position detection sensor 385 detects the second blade 382, the stopper 383 is turned off and the rubber member at the tip of the plunger 384 comes into contact with the vertical sewing blade 380 to stop the rotation (FIG. 11C). At this time, at least one cutting edge of the second blade 382 is positioned at a position facing the recording medium 6. Then, when the cam 312 rotates and the recording medium 6 and the vertical sewing blade 380 come into contact with each other, the second blade 382 makes contact.

  As described above, in the second embodiment, the second blade 382 has a larger blade width and a longer blade length than the first blade 381, but a wider and longer recess is formed on the recording medium 6. And visibility can be improved. Moreover, since a wide perforation is formed at the perforation start position, it is easy to cut even when the user cuts by hand. Furthermore, since most of the perforation is composed of the first blade 381 having a narrow width, the strength of the perforation of the entire cut medium is not impaired, and the image before cutting is not difficult to see. The second blade 382 and the recording medium 6 can be changed by changing the position of the blade position detection sensor 385 or changing the timing at which the stopper 383 is turned off after the blade position detection sensor 385 detects the second blade 382. It is possible to change the relative position of.

  FIG. 12 is a view showing the recording medium 6 in which perforations are formed using the vertical perforation blades 380. A third shape perforation 372 is partially formed by the second blade 382 on a straight line on which the first shape perforation 370 is formed by the first blade 381. As described above, the first shape perforation 370 is not easily noticeable because the perforation has a relatively narrow width and a short length. Therefore, the degree to which the formed image is damaged is small. On the other hand, the third shape perforations 372 have high visibility because the width and length of the perforations are large. The recorded image is damaged at the portion where the third shape perforation 372 is formed, but the third shape perforation 372 is only partially in the entire perforation, so that the image is not greatly damaged, Visibility can be improved.

  Further, even when a perforation having a relatively short length is made, since a part of the second blade 382 first hits the recording medium 6, it is possible to surely improve the visibility and easily obtain the user's cutting. it can.

  In each of the above-described embodiments, the wound recording medium has been described as an example. However, the present invention can be similarly applied to a long folded recording medium. Furthermore, in the above-described embodiment, the recording medium is described as an example of an object to be perforated by the perforation apparatus, but the object is not limited to the recording medium, and other long continuous members, For example, it is possible to perforate the wound resin sheet. In this embodiment, the example in which the perforation is formed on the long recording medium has been described. However, the present invention is not limited to this, and the present invention is also applicable to the case where the perforation is formed on the cut medium that has been cut in advance. The perforation device can be easily applied, and the same effects as those in the above-described embodiments can be obtained.

  Further, in each of the above-described embodiments, the width of the perforation is adjusted by vibrating a disk-shaped sewing blade made of a metal material with a piezoelectric vibrator. In addition, laser light from a laser light emitting element is used. Even in the configuration of cutting, the width of the perforation can be adjusted by vibrating with the same piezoelectric vibrator. The perforation width adjustment with laser light may vary the beam width, but a large output is required, so by vibrating without changing the beam width, the perforation width can be adjusted without increasing the output. It can be appropriately adjusted to a desired width.

According to the present invention,
1. By making the shape of the partial recesses in the perforation wider or longer in the perforation formation direction than other recesses, the visibility of only that part is improved, and the perforation can be found when cutting It becomes easy.
2. By making the perforation partly wide or long, it is possible to maintain the strength of the perforation part before cutting, and to prevent the problem of being cut by handling.
3. By making the perforations partially wide or long, most perforations can be left as narrow and short perforations with low visibility, and the perforations crawl the image formed on the recording medium. Can be prevented.
4). In the perforation, when the cut start portion is a perforation that is wider or longer than the other portions, the cut can be smoothly cut.
5. A part of the sewing blade has a wide or long blade, and by positioning and waiting for the blade before contacting the recording medium, the wide part is removed when contacting the recording medium. It can be provided in the vicinity of the start position of the eye, and even if the entire length is short, a perforation recess having high visibility and easy cutting can be formed therein.
6). Since the perforation shape can be changed by vibrating the perforation blade, the perforation shape having a desired width can be created by changing the voltage applied to the vibrator. Further, by changing the driving frequency and timing, it becomes possible to provide a preferred perforation width at a free position according to the application.

  DESCRIPTION OF SYMBOLS 1 ... Image recording apparatus, 2 ... Feeding part, 3 ... Image recording part, 4 ... Cutter apparatus, 5 ... Discharge part, 6 ... Recording medium, 7 ... Paper tube fixed shaft, 8 ... Stand, 9 ... Brake, 10 ... Device body frame, 11 ... conveying mechanism, 12-18 ... free roller, 19 ... tension roller, 20-23 ... free roller, 24 ... drive motor, 30 ... drum, 30a ... rotating shaft, 40 ... drum, 40a ... rotating shaft , 41 ... drive motor, 42 ... encoder, 50 ... head unit, 51 ... head unit, 60 ... head unit, 70, 80 ... cleaning unit, 90 ... nip roller pair, 91 ... cutter roller pair, 91a ... cutter roller, 91b ... Anvil roller, 92 ... Drive motor, 93 ... Cut blade, 94, 94a, 94b ... Conveyance guide, 95, 95a, 95b ... Discharge roller, 96 ... Discharge tray, 00 ... Perforation device, 310 ... Vertical sewing blade switching mechanism, 311 ... Vertical sewing blade, 312 ... Cam, 313 ... Link bar, 314 ... Cam follower, 315 ... Mounting plate, 316 ... Cam drive motor, 317 ... Link fulcrum, 318 ... Spring, 320 ... Tracking mechanism, 321 ... Slide table, 322 ... Angle member, 323 ... Slide rail, 324 ... Tracking motor, 325 ... Folding belt mechanism, 330 ... Recording medium transport mechanism, 331 ... Anvil roller, 332 ... anvil roller drive motor, 333 ... nip roller, 340 ... frame part, 341, 342 ... side plate, 343, 344 ... support round bar, 345 ... support square bar, 351, 352 ... installation round bar, 353, 354 ... connection member, 355 ... micrometer, 356 ... knob, 357 ... linear motion Pindle, 360 ... vertical perforation blade holding mechanism, 361, 362 ... stay, 363, 364 ... holding plate, 365 ... shaft member, 366 ... bearing, 367 ... piezoelectric vibrator, 368 ... joint, 370 to 372 ... perforation, 373 ... Horizontal cut position, 374 ... Blade position detection sensor, 380 ... Vertical sewing blade, 381, 382 ... Blade, 383 ... Stopper, 384 ... Plunger, 385 ... Blade position detection sensor.

Claims (10)

A disc-shaped blade with a plurality of blades formed on the circumference;
A holding member for rotatably holding the disk-shaped blade;
Comprising
A perforation forming apparatus that forms perforations in which a plurality of recesses are continuous with the workpiece by rotating the disk-shaped blade by contacting the plurality of blades with desired portions of the workpiece,
A perforation forming apparatus comprising shape changing means for changing a part or all of the plurality of recesses. The shape varying means is
A vibrator for vibrating the holding member;
A vibrator control unit for controlling the vibration of the vibrator;
The perforation forming apparatus according to claim 1, further comprising: The holding member is a rotatable shaft-like holding member fixed to the center of the disc-shaped blade,
The perforation forming apparatus according to claim 2, wherein the vibrator vibrates the holding member along an axial direction thereof.   The perforation forming apparatus according to claim 2, wherein the vibrator control unit controls an amplitude amount by which the vibrator vibrates.   The perforation forming apparatus according to claim 2, wherein the vibrator control unit controls a time during which the vibrator vibrates.   The vibrator control unit controls the magnitude of the amplitude of the vibrator by changing a voltage value of an alternating current or binary rectangular wave to be applied, and applies a DC bias voltage to start amplitude or The perforation forming apparatus according to claim 1, wherein the reference position at the time of amplitude is moved to an arbitrary position. The holding member is configured to move between a position where the disk-shaped blade is in contact with the workpiece and a position where the disk-shaped blade is separated from the workpiece,
The vibrator control unit controls the vibrator so as to vibrate the holding member only for a predetermined time immediately after the disk-shaped blade comes into contact with the workpiece or immediately before being separated from the workpiece. The perforation forming apparatus according to claim 3. Among the plurality of blades formed on the circumference of the disk-shaped blade, blades having a constant length in the rotation direction of the disk-shaped blade and a width in a direction orthogonal to the rotation direction are continuously formed. Having a first blade,
The shape variable means constitutes the plurality of blades, and is a blade formed on a circumference of the disk-shaped blade and has a length different from the length or width of the first blade or The perforation forming apparatus according to claim 1, wherein the perforation forming apparatus is a second blade having a width.   The perforation forming apparatus according to claim 7, wherein the second blade has a length or width that is greater than a length or width of the first blade. The holding member is movable so as to be movable between a position where the disk-shaped blade is in contact with the workpiece and a position where the disk-shaped blade is separated from the workpiece;
A sensor for detecting that the second blade has reached a position facing the workpiece in a state in which the disk-shaped blade continues to rotate at a position separated from the workpiece;
Based on the output of the sensor, a stopper for stopping the rotation of the disk-shaped blade,
The perforation forming apparatus according to claim 8, comprising:

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