JP3904316B2 - Cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting apparatus that is incorporated in an image forming apparatus that forms an image on a recording medium and cuts the recording medium while traveling in a predetermined direction.
[0002]
[Prior art]
2. Description of the Related Art As an output device for a computer or workstation, an ink jet image forming apparatus that discharges ink to form an image on a recording medium and an electrophotographic image forming apparatus are known. Among these image forming apparatuses, there is a type in which a recording medium (roll paper) wound in a roll is unwound from one end and conveyed in a predetermined conveying direction to form an image. In general, this type of image forming apparatus is provided with a cutting device that cuts a recording medium while traveling in a direction orthogonal to the transport direction. The cutting device includes a cutter that contacts the recording medium and cuts the recording medium, and the recording medium is cut into an arbitrary size by the cutting edge (cutter blade) of the cutter.
[0003]
Usually, during image formation, the recording medium is not cut by a cutting device, and the recording medium is cut after the image is formed. For this reason, during image formation, the cutting device is kept waiting at a position (standby position) that does not interfere with conveyance of the recording medium, and the cutting device is moved to a position (cutting position) where the recording medium can be cut after image formation. This movement is performed by an electric means such as a motor or a solenoid.
[0004]
When an abnormal situation occurs in which the recording medium cannot be smoothly cut when the cutting apparatus starts to cut the recording medium or during the cutting, the cutting apparatus receives resistance from the recording medium. In this case, a part of the recording medium is pushed by the cutter blade of the cutting device without being cut, a part of the recording medium is in a so-called accordion jam state, and then the cutting device stops. When the cutting device stops in this way, generally, the cutting device is moved to a standby position, for example, and the cutter is replaced. Further, the accordion jammed portion of the recording medium is removed to return to the normal state, and the recording medium is set again. Further, when an image is formed in the accordion jammed portion of the recording medium, the image of this portion is re-formed.
[0005]
As a technique for preventing such an abnormal situation, the cutter is pulled by a coil spring in the cutting direction for cutting the recording medium, the sharpness of the cutter is lowered and the resistance from the recording medium is increased, and this resistance is increased by the tension of the coil spring. A technique is known in which the cutter rotates slightly when it becomes stronger than the force, and the portion of the cutter blade in contact with the recording medium is changed (see JP-A-8-290386). In this way, an abnormal situation caused by a reduction in the sharpness of the cutter is prevented by gradually changing the portion of the cutter blade that is in contact with the recording medium.
[0006]
[Problems to be solved by the invention]
As described above, the cause of the abnormal situation in which the recording medium cannot be cut smoothly is that the cutter has reached the end of its life and the sharpness has deteriorated. Another reason is that although the sharpness of the cutter is not deteriorated, a part of the recording medium is bent, and the cutter blade comes into contact with the bent part and receives resistance. In the case of the other causes described above, there is a problem that the cutter is replaced even though the cutter is still usable. In addition, in any case, there is a problem that a part of the recording medium is in an accordion jam state and is damaged.
[0007]
In the technique described in Japanese Patent Laid-Open No. 8-290386, when the tension force of the coil spring is set to be weak so as to match the thin paper, the resistance from the thick paper to the cutter blade is greater than the tension force of the coil spring in the thick paper. Is too large to cut the cardboard.
[0008]
SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a cutting device that does not mistake a cutter replacement time (exchange time) and that does not damage a recording medium.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a first cutting apparatus of the present invention is a cutting apparatus incorporated in an image forming apparatus that cuts a recording medium while traveling in a predetermined direction in an image forming apparatus that forms an image on a recording medium. In the device
(1) a cutter that contacts the recording medium and cuts the recording medium;
(2) The cutter begins to cut the recording medium Cutting position, The cutter waits above the recording medium The standby position, and when the cutter receives a resistance force of a predetermined value or more from the recording medium, the cutter moves away from the recording medium and stops at the position where the cutting of the recording medium is stopped. And a transition means for shifting the cutter so that the cutter is positioned.
[0010]
here,
(3) The transfer means may have a function of transferring the cutter from the standby position to the cutting position when passing through a predetermined area.
[0011]
Also,
(4) The transition means may include a spring having an urging force weaker than a predetermined resistance value or more that urges the cutter to contact the recording medium.
[0012]
further,
(5) The spring may be capable of changing the biasing force.
[0013]
Furthermore,
(6) The cutting device may include detection means for detecting whether or not the cutter is located at the stop position.
[0014]
In order to achieve the above object, a second cutting device of the present invention is incorporated in the image forming apparatus that forms an image on a recording medium and cuts the recording medium while traveling in a predetermined direction. Cutting device,
(7) a cutter that contacts the recording medium and cuts the recording medium;
(8) The cutter begins to cut the recording medium Cutting position and The cutter is above the recording medium. The cutter is in either of the standby stop positions where the cutter is separated from the recording medium and stops cutting the recording medium when the cutter receives a resistance force of a predetermined value or more from the recording medium. And a transfer means for transferring the cutter so as to be positioned.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the cutting apparatus of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a perspective view showing a schematic configuration of a plotter in which a cutting device of the present invention is incorporated.
[0017]
The plotter 1 is fixed to the top of a stand 2 with casters 2a. The plotter 1 includes an operation unit 3 for operating the plotter 1. By operating various switches installed on the operation unit 3, the paper size, online / offline, command, and the like are instructed. The A recording medium such as recording paper inserted into the recording medium insertion port 4 from the direction of arrow A is conveyed into the plotter 1 based on an instruction from the operation unit 3, and an image is printed and discharged.
[0018]
With reference to FIG. 2, the recording paper conveyance path and the printing (image forming) process will be described.
[0019]
FIG. 2 is a perspective view showing a path from insertion to ejection of the recording paper by cutting out the plotter of FIG.
[0020]
The plotter 1 can perform printing on a sheet-like recording paper (cut paper) inserted from the recording medium insertion opening 4 and a recording paper (roll paper) 6 wound in a roll shape. Here, the conveyance path of the cut sheet inserted from the recording medium insertion port 4 will be described, but the roll sheet 6 is similarly conveyed.
[0021]
On the cover 7 of the roll paper 6, for example, a large cut paper is placed and inserted into the recording medium insertion port 4 from the direction of arrow A. The inserted cut paper passes between the cover 7 and the upper guide 8 and is rotatably fixed to the paper transport roller 10a and the upper transport roller support plate 11 which are rotatably fixed to the lower transport roller support plate 9. While being sandwiched between both the paper conveyance roller 10 b and the driving roller 12, it is conveyed above the printing plate 14. The cut sheet that has passed over the printing plate 14 is then sandwiched between the discharge roller 20 and the spur 22 positioned thereon and discharged. The spur 22 is fixed to the spur plate 21 so as to be rotatable.
[0022]
The plotter 1 also includes a carriage 16 that reciprocates in the direction of arrow B. The carriage 16 includes a head holder 18, and four print heads 19 each containing four kinds of color inks (for example, cyan, magenta, yellow, and black) are mounted on the head holder 18. . The carriage 16 is fixed to a belt 17 hung on a carriage drive motor (not shown), and the belt 17 reciprocates in the direction of arrow B by forward and reverse rotation of the carriage drive motor. When the belt 17 reciprocates in the arrow B direction, the carriage 16 is also guided by the guide rail 24 and reciprocates in the arrow B direction. A cutting device 40 (see FIG. 3), which will be described later, is arranged so as to be movable in the arrow B direction slightly above the carriage 16 and downstream of the recording paper conveyance direction (arrow C direction).
[0023]
The cut paper is conveyed intermittently in the direction of arrow C. In forming an image on a cut sheet, the cut sheet is temporarily stopped, and ink is ejected based on image information input to the print head 19 while the carriage 16 is reciprocated in the arrow B direction. Among them, an image for one band is formed in a portion located in the image forming area. Thereafter, the cut sheet is conveyed by a predetermined length, and an image for the next band is formed in a portion newly located in the image forming area. This operation is repeated over the entire length of the cut sheet. Thereby, a color image is formed on the cut sheet. The cut sheet on which the color image is formed is discharged along the platen 28 while being sandwiched between the discharge roller 20 and the spur 22.
[0024]
An embodiment of a cutting device will be described with reference to FIGS.
[0025]
FIG. 3 is a perspective view showing the cutting device. 4 is a partial cross-sectional view showing a state where the cutter is waiting at the standby position from the side, and FIG. 5 is a partial view showing the state where the cutter is cutting the recording paper at the cutting position. It is sectional drawing. FIG. 6 is a partial cross-sectional view showing the state where the cutter has finished moving to the stop position from the side. In these drawings, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals.
[0026]
As described above, the cutting device 40 is disposed slightly above the carriage 16 and downstream in the recording paper conveyance direction. The cutting device 40 is roughly divided into a first cutter arm 50 that rotates about a rotation shaft 42, and a first rotation that rotates about the rotation shaft 42 as the first cutter arm 50 rotates. Two cutter arms 60, a cutter unit 70 connected to the second cutter arm 60, and a cutter cover 44 in which the first cutter arm 50, the second cutter arm 60, the cutter unit 70, etc. are housed. A part of the cutter unit 70 may protrude from the cutter cover 44. The rotating shaft 42 is rotatably fixed to the side wall 44 a of the cutter cover 44.
[0027]
A cutter 72 that contacts the recording paper 29 and cuts the recording paper 29 is fixed to the tip of the cutter unit 70. The cutter unit 70 has a cutting position (the position shown in FIG. 5) where the cutter 72 contacts the recording paper 29 and cuts the recording medium, and a standby position where the cutter 72 starts to cut the recording paper 29 (shown in FIG. 4). Position) and a stop position where the cutter 72 is separated from the recording paper 29 and stops cutting the recording paper 29 when the cutter 72 receives a resistance force of a predetermined value or more from the recording paper 29 (position indicated by a solid line in FIG. 6). ) To move to one of the positions. As the cutter unit 70 moves, the cutter 72 also moves so as to be located at any one of the three positions described above.
[0028]
A guide rail 32 extends above the platen 28 in a direction perpendicular to the conveyance direction (arrow C direction) of the recording paper 29. The guide rail 32 is for guiding the cutting device 40, but a support rail (not shown) that helps guide the carriage 16 may also be used as the guide rail 32.
[0029]
A key-shaped hook 54 is formed on a portion of the first cutter arm 50 that is slightly away from the rotating shaft 42, and one end of a tension coil spring 46 is fixed to the hook 54. The other end of the tension coil spring 46 is fixed to a key-shaped hook 44 b formed on the inner surface of the cutter cover 44. For this reason, the first cutter arm 50 is biased by the tension coil spring 46 so as to rotate in the clockwise direction in FIG. 4 about the rotation shaft 42. As a result, the cutter unit 70 is also urged by the tension coil spring 46 so as to rotate clockwise in FIG. At the standby position shown in FIG. 4, a part of the cutter unit 70 protrudes from the upper part of the cutter cover 44. However, the entire cutter unit 70 is accommodated in the cutter cover 44 at the cutting position shown in FIG. 5 and the stop position shown in FIG.
[0030]
A cutter roller 52 is rotatably fixed to a portion of the first cutter arm 50 opposite to the rotation shaft 42 with the hook 54 interposed therebetween. The cutter roller 52 is positioned slightly above the guide rail 32 at the standby position shown in FIG. However, at the cutting position shown in FIG. 5 and the stop position shown in FIG. 6, it rotates while moving in the direction of arrow F in contact with the back surface 32 a of the guide rail 32.
[0031]
As described above, the guide rail 32 extends above the platen 28, but as shown in FIG. 4, a guide port 34 that opens toward the cutting device 40 is formed at a position away from (disengaged from) the platen 28. A guide plate 36 is disposed. Further, a flapper 38 that opens and closes the outlet is attached to the outlet of the guide port 34. The flapper 38 is rotated by being pushed by the cutter roller 52 as will be described later, around the rotation shaft 38a. A coil spring (not shown) for urging the flapper 38 in the clockwise direction in FIG. 4 (in the direction of arrow G) is disposed on the rotating shaft 38a. Therefore, when no external force acts on the flapper 38, the outlet of the guide port 34 is closed as shown by the solid line in FIG. The area from the entrance to the exit of the guide port 34 is an example of the predetermined area referred to in the present invention.
[0032]
As described above, in the standby position shown in FIG. 4, the cutter unit 70 is located above and away from the recording paper 29, and the paper pressing plate 80 is also located above the recording paper 29. In order for the cutter unit 70 to shift from the standby position to the cutting position, the cutting device 40 is moved to the left in FIG. As a result, the cutter roller 52 abuts against the guide plate 36. When the cutter roller 52 is further moved to the left in FIG. 4, the cutter roller 52 is guided by the guide plate 36 and moved downward to push down the flapper 38 and enter the back surface 32 a side of the guide rail 32.
[0033]
With such movement of the cutter roller 52, the first cutter arm 50 rotates counterclockwise about the rotation shaft 42, and the lower end portion 56 of the first cutter arm 50 is a stopper of the connecting member 74. The shaft 76 is pushed down. As a result, the cutter holder 78 and the second cutter arm 60 connected to the connecting member 74 also rotate counterclockwise about the rotation shaft 42. Further, since the first cutter arm 50 is biased in the direction of arrow D by the tension coil spring 46, the cutter roller 52 is pressed against the back surface 32 a of the guide rail 32. As a result, as shown in FIG. 5, the cutter unit 70 moves to a cutting position where the recording paper 29 can be cut. Further, the paper pressing plate 80 presses the recording paper 29 from above.
[0034]
Even when the cutter unit 70 is located at the cutting position, the first cutter arm 50 is biased clockwise (in the direction of arrow D) by the tension coil spring 46. For this reason, as described above, the cutter roller 52 is pressed against the back surface 32a of the guide rail 32. As a result, the cutter unit 70 is regulated in its movement and stabilized at the cutting position. When the cutting device 40 travels above the recording paper 29 with the cutter unit 70 still in the cutting position, the cutter 72 contacts the recording paper 29 and cuts the recording paper 29.
[0035]
The side of the guide rail 32 opposite to the guide plate 36 shown in FIG. 4 is an end 32c as shown in FIG. When the cutting device 40 finishes cutting the recording paper 29 and the cutter roller 52 passes through the end portion 32c, the first cutter arm 50 is pulled by the tension coil spring 46 to rotate clockwise about the rotation shaft 42. It rotates in the direction of arrow D, and the cutter roller 52 hits the inner surface of the cutter cover 44 and the lower end portion 56 of the first cutter arm 50 hits the lower surface of the second cutter arm 60 to push up the second cutter arm 60. In this state, the first cutter arm 50 stops. Thereby, the cutter unit 70 shifts from the cutting position to the standby position.
[0036]
A series of operations in which the cutter unit 70 moves between the standby position and the cutting position in this way is a basic recording paper cutting operation of the cutting device 40.
[0037]
Next, the movement of the cutter unit 70 when an abnormal situation occurs in which the recording medium 29 cannot be smoothly cut when the cutting device 40 starts cutting the recording paper 29 or during cutting will be described.
[0038]
When the cutting edge (cutter blade) of the cutter 72 deteriorates or the recording paper 29 is bent and becomes difficult to cut, the cutter 72 receives resistance from the recording paper 29. Due to this resistance, the cutter 72 and the cutter holder 78 holding the cutter 72 try to rotate in the clockwise direction (arrow D direction) about the rotation shaft 82. This rotation occurs when the resistance force from the recording paper 29 is greater than the urging force of the compression coil spring 84 disposed on the opposite side of the cutter holder 78 from the cutter 72. Therefore, when the resistance force from the recording paper 29 is smaller than the urging force of the compression coil spring 84, the cutter 72 and the cutter holder 78 do not rotate and continue to cut the recording paper 29 as shown in FIG.
[0039]
The urging force of the compression coil spring 84 is such that the cutter 72 rotates immediately before the cutter 72 is in an accordion jam state when the cutter 72 deteriorates or the recording paper 29 is bent and an abnormal situation occurs. It is desirable that the biasing force be such that it moves away from the recording paper 29.
[0040]
As described above, when the cutter 72 and the cutter holder 78 are rotated, as shown in FIG. 6, the connecting member 74 held by the lower end portion 56 of the first cutter arm 50 causes the recording paper to be cut. It moves in the direction opposite to the direction (arrow E direction shown in FIG. 6). Thereby, the stopper shaft 76 of the connecting member 74 is separated from the lower end portion 56 of the first cutter arm 50. As a result, the cutter 72, the cutter holder 78, the connecting member 74, and the second cutter arm 60 are rotated in the direction of arrow D by the elasticity of the paper pressing plate 80, and the guide hole 80b formed in the side plate 80a of the paper pressing plate 80. The guide shaft 78a of the cutter holder 78 abuts against (buts against) the upper end regulating surface 80c. This contact stops the rotation of the cutter 72, the cutter holder 78, and the like. This stopped position is the stop position referred to in the present invention.
[0041]
Even if the carriage 72 (see FIG. 3) moves in the recording paper cutting direction (arrow F direction) with the cutter 72, the cutter holder 78, etc. stopped at the stop position in this way, the cutter 72 remains on the recording paper 29. Therefore, the cutter 72 does not press the recording paper 29 and a part of the recording paper 29 does not enter a so-called accordion jam state. Further, when the cutter roller 52 passes the end portion 32c of the guide rail 32 with the cutter 72, the cutter holder 78, etc. stopped at the stop position, the first cutter arm 50 is pulled by the tension coil spring 46, While the side end portion 58 of the first cutter arm 50 slightly pushes the connecting member 74 in the direction of arrow E, the cutter unit 70 rises. As a result, the cutter unit 70 moves to the standby position and returns to the state shown in FIG. Here, the transition means referred to in the present invention is constituted by the first and second cutter arms 50 and 60, the tension coil spring 46, the compression coil spring 84, and the like.
[0042]
As described above, when the cutter 72 receives resistance from the recording paper 29 because the cutting edge of the cutter 72 is deteriorated or the recording paper 29 is bent and difficult to cut, the cutter 72 moves from the cutting position to the stop position. Then, the recording paper 29 is separated. Therefore, the recording paper 29 is not damaged even when an abnormal situation occurs when the recording paper 29 starts to be cut or during cutting. Further, even if there is no abnormal situation caused by the recording paper 29 such as bending of the recording paper 29, the cutter 72 has a life span when the cutter unit 70 moves from the cutting position to the stop position. In this case, the cutter 72 can be replaced without mistaking the replacement time (replacement time) of the cutter 72. When the cutter 72 is replaced, as shown in FIG. 4, the cutter 72 is easily replaced by removing the cutter 72 in the direction of arrow D while removing the hooking portion 78 a formed above the cutter 72.
[0043]
A second embodiment of the cutting device will be described with reference to FIG.
[0044]
FIG. 7 is a partial cross-sectional view from the side showing that the cutter of the cutting apparatus of the second embodiment is cutting the recording paper at the cutting position. In this figure, the same components as those in FIGS. 3 to 6 are denoted by the same reference numerals.
[0045]
The cutting device 90 of the second embodiment is characterized in that the urging force of the compression coil spring 84 that urges the cutter 72 to contact the recording paper 29 can be changed. A pressure adjustment plate 92 is disposed at the upper end of the compression coil spring 84, and the pressure adjustment plate 92 is configured to be pressed by an adjustment screw 94 and a spring washer 96. By turning the adjusting screw 94, the urging force of the compression coil spring 84 can be finely adjusted.
[0046]
Accordingly, by turning the adjusting screw 94 to finely adjust the urging force of the compression coil spring 84 in accordance with the magnitude of the buckling strength of the recording paper due to the difference in the paper type and usage environment, any paper type and usage environment can be obtained. Even when the cutter 72 is deteriorated or when an abnormal situation occurs suddenly at the cut portion of the recording paper 29, the cutter 72 causes a part of the recording paper 29 to be in the so-called accordion jam state. There is no.
[0047]
A third embodiment of the cutting device of the present invention will be described with reference to FIG.
[0048]
FIG. 8 is a partial cross-sectional view from the side showing a state where the cutter of the cutting device of the third embodiment is waiting at the standby position. In this figure, the same components as those in FIGS. 3 to 7 are denoted by the same reference numerals.
[0049]
The cutting device 100 according to the third embodiment is characterized in that it can be detected whether or not the cutter 72 is located at the stop position. A micro switch 104 is disposed at one end of the cutter cover 102. On the other hand, a switch selection rib 108 for turning the micro switch 104 on and off is fixed to the cutter holder 78 of the cutter unit 106. While the cutter 72 is cutting the recording paper 29, the micro switch 104 is on. However, when the cutter 72 is located at the stop position, the micro switch 104 is off. The on / off state of the microswitch 104 is configured to be displayed on the operation unit 3 (see FIG. 1), for example. As a result, it is easily determined that the cutting has been stopped when the cutter 72 is deteriorated or when an abnormal situation occurs suddenly at the cutting portion of the recording paper 29. The same effect can be obtained by using an optical sensor instead of the microswitch 104.
[0050]
In the above-described embodiment, the standby position and the stop position of the cutter 72 are different from each other. However, the standby position and the stop position may be the same position (the standby stop position according to the present invention). Good.
[0051]
【The invention's effect】
As described above, according to the first cutting device of the present invention, when the cutter receives a resistance force of a predetermined value or more from the recording medium, the cutter is separated from the recording medium and stops the cutting of the recording medium. It is made to transfer by a transfer means so that it may be located in. When the recording medium is not bent, the cutter is deteriorated and the sharpness is lowered, so that the recording medium receives a resistance force of a predetermined value or more. Therefore, it can be determined that the cutter should be replaced with a new one. In addition, when the recording medium is bent, it can be determined that the cutter has not deteriorated due to the bending force causing the recording medium to receive a resistance greater than a predetermined value. As a result, there is no mistake in the cutter replacement time (replacement time). Further, regardless of whether the cutter is deteriorated or the recording medium is bent, the cutter moves to the stop position, so that the recording medium is not damaged.
[0052]
Here, when the transition means is to shift the cutter from the standby position to the cutting position when it passes through the predetermined area, it can be surely transferred from the standby position to the cutting position only by passing through the predetermined area. A good cutting device can be obtained.
[0053]
Further, when the transfer means is provided with a spring having an urging force weaker than a predetermined resistance force that urges the cutter to come into contact with the recording medium, the recording paper is more reliably damaged. Can be prevented.
[0054]
In addition, if the above-mentioned spring can change its urging force, regardless of the paper type or usage environment, when the cutter is deteriorated or suddenly abnormal in the cut part of the recording medium When a situation occurs, a part of the recording medium is not put into a so-called accordion jam state by the cutter.
[0055]
In addition, when equipped with detection means that detects whether or not the cutter is positioned at the stop position, cutting is stopped when the cutter deteriorates or when an abnormal situation occurs suddenly at the cutting portion of the recording medium. It can be easily judged.
[0056]
Further, according to the second cutting device of the present invention, when the cutter receives a resistance force of a predetermined value or more from the recording medium, the cutter moves away from the recording medium and is positioned at a standby stop position where the cutting of the recording medium is stopped. It is made to transfer by a transfer means. When the recording medium is not bent, the cutter is deteriorated and the sharpness is lowered, so that the recording medium receives a resistance force of a predetermined value or more. Therefore, it can be determined that the cutter should be replaced with a new one. In addition, when the recording medium is bent, it can be determined that the cutter has not deteriorated due to the bending force causing the recording medium to receive a resistance greater than a predetermined value. As a result, there is no mistake in the cutter replacement time (replacement time). Even if the cutter is deteriorated or the recording medium is bent, the cutter moves to the standby stop position, so that the recording medium is not damaged.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a plotter in which a cutting device of the present invention is incorporated.
2 is a perspective view showing a path from insertion to ejection of a recording sheet by cutting out the plotter of FIG. 1. FIG.
FIG. 3 is a perspective view showing an embodiment of the cutting device of the present invention.
4 is a partial cross-sectional view showing a state in which the cutter of the cutting device of FIG. 3 is waiting at a standby position from the side.
5 is a partial cross-sectional view from the side showing that the cutter of the cutting device of FIG. 3 is cutting the recording paper at the cutting position.
6 is a partial cross-sectional view from the side showing a state in which the cutter of the cutting device of FIG. 3 has finished moving to the stop position.
FIG. 7 is a partial cross-sectional view from the side showing that the cutter of the cutting apparatus of the second embodiment is cutting the recording paper at the cutting position.
FIG. 8 is a partial cross-sectional view showing a state in which the cutter of the cutting device of the third embodiment is waiting at a standby position from the side.
[Explanation of symbols]
1 Plotter
29 Recording paper
32 guide rail
34 Information gate
36 Information board
40, 90, 100 cutting device
42 Rotating shaft
46 Tension coil spring
50 First cutter arm
52 Cutter roller
60 Second cutter arm
70 Cutter unit
72 cutter

Claims (6)

In the image forming apparatus for forming an image on a recording medium, the cutting apparatus incorporated in the image forming apparatus for cutting the recording medium while traveling in a predetermined direction,
A cutter that contacts the recording medium and cuts the recording medium;
A cutting position at which the cutter starts to cut the recording medium, a standby position at which the cutter waits above the recording medium , and the cutter records the recording medium when the cutter receives a resistance greater than a predetermined value from the recording medium. A cutting apparatus comprising: a transition unit that moves the cutter so that the cutter is positioned at any one of the stop positions where the cutting of the recording medium is stopped away from the medium. The transition means includes
The cutting apparatus according to claim 1, wherein the cutter is moved from the standby position to the cutting position when passing through a predetermined region. The transition means includes
The cutting apparatus according to claim 1, further comprising a spring having a biasing force that is biased so that the cutter comes into contact with the recording medium and is weaker than the resistance force equal to or greater than the predetermined value. . The spring is
The cutting device according to claim 3, wherein the biasing force can be changed.   The cutting device according to any one of claims 1 to 4, further comprising detection means for detecting whether or not the cutter is located at the stop position. In the image forming apparatus for forming an image on a recording medium, the cutting apparatus incorporated in the image forming apparatus for cutting the recording medium while traveling in a predetermined direction,
A cutter that contacts the recording medium and cuts the recording medium;
The cutting position at which the cutter starts to cut the recording medium , and the cutter waits above the recording medium and when the cutter receives a resistance greater than a predetermined value from the recording medium, the cutter is removed from the recording medium. A cutting apparatus comprising: a transition means for moving the cutter so that the cutter is positioned at either of the standby stop positions where the recording medium is cut off at a distance.

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