JPH0919888A - Paper sheet cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper sheet cutting device which can suppress generation of paper dust from the sheet front surface where a coating layer is generally provided, can cut with a narrow cut, and allows compact installation of a guide mechanism and/or driving mechanism for a moving blade. SOLUTION: A paper sheet cutting device concerned cuts a sheet transported on a transport path, wherein the arrangement includes a stationary blade 15 positioned on one side of the transport surface of the path 1 while the transport surface serves as the boundary, a moving blade 22 which moves along the cutting edge of the stationary blade 15 and cuts the sheet P, and a guide rail 17 which guides the moving blade 22 along the stationary blade 15. Further a suction chamber 31 for restriction of the location is furnished which attracts the sheet P to the sheet cutting position with the stationary and moving blades 15 and 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device in an image forming apparatus, and more particularly to a sheet cutting device for cutting a sheet in its width direction by moving a movable blade with respect to a fixed blade.

[0002]

2. Description of the Related Art Image forming apparatuses include various types such as an ink jet recording system, an electrostatic recording system, and a thermal recording system. Sheets in this type of image forming apparatus are of a type in which sheets that have been cut into a predetermined length in advance are fed one by one, as well as the required length after forming an image on a sheet fed from a long roll of paper. There is a method of cutting.

The latter method requires a sheet cutting device for cutting in the width direction of the sheet in order to make the sheet fed from the roll paper a predetermined length. Conventionally, a sheet cutting apparatus of this type is configured by arranging a fixed blade on the lower side of the sheet conveyance surface so that the height of the sheet conveyance surface is adjusted and a movable blade on the upper side of the sheet conveyance surface. That is, the sheet on the sheet conveying surface is cut by sandwiching the sheet from both sides with the fixed blade and the movable blade. In this case, since the fixed blade is installed below the sheet conveying surface, it is installed on the back side of the sheet. The movable blade is installed on the front side of the sheet.

By the way, since the movable blade is installed above the sheet conveying surface, it is necessary to install a rail for guiding the movable blade and a member such as a drive belt of a driving device for rotating the movable blade. Further, members such as these rails and drive belts are arranged longer than the seat width. Further, the mechanism for guiding the movable blade and the device for driving the movable blade are arranged facing the fixed blade.

For this reason, the upper and lower portions of the sheet conveying path near the sheet cutting portion are densely packed, a margin space is lost, and it becomes difficult to perform work such as setting of sheets and post-treatment of paper jam. . In addition, for example, in an ink jet recording type image forming apparatus, in addition to the members of the sheet cutting device, a carriage on which a recording head and an ink cartridge are mounted runs on the upper side of the sheet conveying surface, and the carriage of the carriage also moves. A mechanism to guide the movement is also installed. Since the rails, wires, pulleys and the like of these mechanisms are often installed near the sheet cutting portion, the margin space in this portion is narrowed, and the above-mentioned disadvantage that the work is difficult is increased.

In order to make up for such drawbacks, a sheet cutting device having a structure as shown in FIGS. 14 and 15 can be considered. This is the fixed blade 8 below the sheet conveying surface 80.
1 is arranged, and the movable blade 82 is placed at a position on the back side of the fixed blade 81.
The holder guide rail portion 83 is arranged.
The guide rail portion 83 is provided with a fixed machine frame 84, and the fixed blade 81 and the drive pulley 85 are attached to the machine frame 84. The rail portion 87 guides the holder 86 of the movable blade 82 by utilizing a part of the machine frame 84. A part of the drive wire 88 hung on the drive pulley 85 is connected to the holder 86. The holder 86 includes the rail portion 8 of the machine frame 84.
A pair of guide rollers 89 that sandwich 7 from both sides are provided.

A part of the holder 86 extends vertically across the sheet conveying surface 80 to the opposite side of the fixed blade 81 to the upper side of the sheet conveying surface 80.
Then, the movable blade 82 is rotatably attached. The movable blade 82 is inclined and held so that the moving direction of the movable blade 82 contacts the cutting edge of the fixed blade 81. Further, the moving blade 82 is a sheet conveying road surface 80.
The roller 91 is provided coaxially with the roller 91 that is in contact with the upper surface of the sheet, and is rotated by the roller 91 rolling when it crosses the sheet conveyance path surface 80.

When the driving pulley 85 is rotationally driven by a driving source (not shown), the driving wire 88 hung on the driving pulley 85 moves the holder 86, and the moving blade 82, together with the holder 86, cuts the cutting edge of the fixed blade 81. The sheet is cut by moving while rotating in sliding contact. In FIG. 15, D is the width that can be cut at that time.

In the image forming apparatus as shown here, a carriage 94 having a recording means such as a recording head 93 and an ink cartridge is arranged facing the chamber 92 having a platen surface. The carriage 94 can reciprocate in a direction orthogonal to the sheet conveying direction over a range greater than the sheet width. The recording head 93 and the upper surface of the chamber 92 serve as a recording portion on the sheet. At the position upstream of the recording unit on the sheet transport surface 80, the transport unit 9 is provided.
5 is installed to supply sheets to the recording section.

The sheet cutting device is provided at a position downstream of the recording unit on the sheet conveying surface 80, and a sheet discharging unit 96 for discharging a sheet from the recording unit is provided downstream of the sheet cutting device. The paper discharging means 96 is provided with guide plates 97 and 98 for guiding the leading end of the conveyed sheet and a paper discharging roller 99.

The recording means in such an image forming apparatus may be a thermal recording system or an inkjet system.
The sheet (paper) used has a recording surface side surface coated with an ink receiving layer, a color former or the like. As a result, the sheet cutting device of such an image forming apparatus has the following problems.

First, as shown in FIG. 13, the sheet P
When the coating layer 101 on the recording surface side of the sheet is torn by the moving blade 82, the coating layer 101 slides on the moving blade 82 for a long time, and the coating layer 101 is torn from the surface side by the moving blade 82.
There is a problem that the portion of the coat layer 101 is easily peeled off from No. 2 and a large amount of paper dust 103 is likely to appear on the recording side. Moreover, in this type of sheet P, the coat layer 101 is the sheet base material 1
In some cases, the paper powder 103 is more likely to come out because it has a property of being easily peeled off from No. 02.

Due to the increase in the amount of paper powder 103, the sharpness of the blade becomes poor and the inside of the device becomes dirty. Particularly, in the case of a device having a delicate ink jet nozzle such as an ink jet recording system, the paper powder 10
Since 3 easily scatters also on the recording surface side where the recording head 93 is located, it easily attaches to the ink jet nozzle of the recording head 93. If it adheres to the ink ejection nozzle, there are serious drawbacks such as the inability to eject ink and the deviation of the ejection direction, resulting in poor landing position accuracy.

Further, the extended portion 90 of the holder 86 extending from the fixed blade 81 side in the direction of penetrating the sheet passes through the cut portion of the sheet together with the movable blade 82.
In this case, if there is nothing to regulate the sheet on the downstream side of the sheet conveying surface 80, the sheet is easily retracted and moved to the downstream side, so that the extension portion 90 of the holder 86 holding the moving blade 82 is cut. It is possible to move comfortably through the gap between the P cuts.

However, in the sheet cutting apparatus as shown in FIGS. 14 and 15, the guide plates 97 and 98 of the sheet discharging means 96 and the sheet discharging rollers are provided on the sheet conveying surface 80 on the downstream side of the sheet cutting apparatus. 99 is provided, and these inhibit the movement of the separated sheet P. When the sheet P cut in this way tends to impede the operation of retracting to the paper discharge side, the cut line at the time of cutting is maintained in a narrow state, and the moving blade 82, particularly the holder 86 thereof, keeps the gap between the cut lines. When the sheet passes, there are problems that the sheet edge is squeezed to cause waviness, the holder 86 does not move smoothly due to frictional resistance, and the sheet is not cut normally.

In order to avoid such a problem, it is practically difficult to thin the member of the extension portion 90 that supports the movable blade 82 in the holder 86 because of the function of holding the movable blade 82. It was something.

Further, the movable blade 82 has a guide rail portion 87.
As a result of being held by the extended portion of the holder 86 at a position distant from the holder 86, there is a problem in that it is difficult to obtain dimensional accuracy for stable sliding contact between the fixed blade 81 and the movable blade 82 due to the bending of the support arm portion and the like. Further, the strength of the portion supporting the holder 86 cannot be sufficiently maintained, and there is a problem that the holder 86 is damaged by being touched by hand during maintenance or the like.

Furthermore, since the movable blade 82 is adapted to reciprocate left and right over the width of the sheet, it is impossible to provide sheet guide means at the sheet cutting portion. Since it is not possible to provide a continuous sheet guide means for guiding the sheet from the upstream side to the downstream side of the sheet conveying path surface 80 across the sheet cutting device, it is possible to guide the sheet at the most unstable sheet cutting portion. There was a big problem that it became insufficient and paper jam easily occurred. Even if intermittently different conveyance guides are provided with the sheet cutting portion interposed therebetween, not only the number of parts of the sheet guide means increases and the cost increases, but also the width of the portion holding the movable blade 82 is too wide, which is an effective guide. It was difficult to say.

Since the movable blade 82 is rotated by the rolling of the roller 91 when it crosses the sheet conveying path surface 80, it comes into contact with the sheet on the upper surface of the sheet conveying path surface 80 and disturbs the posture of the conveyed sheet. There is a risk.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to suppress the generation of paper dust from the sheet surface side where the coating layer is generally located and to cut at a narrow cut. Another object of the present invention is to provide a sheet cutting device capable of providing a movable blade guide mechanism and a drive mechanism in a compact manner.

[0021]

According to a first aspect of the present invention, there is provided a sheet cutting device for cutting a sheet conveyed in a sheet conveying path, which is located on one side of the sheet conveying surface with the conveying surface of the sheet conveying path as a boundary. Fixed blade, a moving blade that moves along the blade portion to the fixed blade to cut the sheet, and a guide unit that guides the moving blade along the fixed blade, and further, the fixed blade and It is characterized in that a sheet positioning regulation means for aligning a cutting position of the sheet with a sheet cutting position by the movable blade is provided.

A second invention is a sheet cutting device for cutting a sheet conveyed in a sheet conveying path, wherein a fixed blade is located on one side of the conveying surface of the sheet conveying path as a boundary, and a fixed blade. A main body of a moving blade that moves along the blade portion and cuts the sheet on the blade, a guide unit that guides the moving blade along the fixed blade, and a support member that supports the moving blade are arranged. , An extending portion extending from the supporting member is provided, and the extending portion and a part of the movable blade penetrate the sheet conveying surface and project to the other side of the sheet conveying surface, and the extending portion is to be cut. A sheet positioning regulation means for regulating the position of the sheet portion to the sheet cutting position by the fixed blade and the movable blade is provided, and the blade edge of the movable blade protrudes in a direction away from the sheet positioning regulation surface beyond the fixed blade. And butterflies.

A third invention is a sheet cutting device for cutting a sheet conveyed in a sheet conveying path, a guide means having a pair of guide surfaces facing each other to form the sheet conveying path, a fixed blade and a moving member. A movable blade having a blade, which is movable from the outside of one guide surface of the guide means into the sheet conveying path and is movable in a direction orthogonal to the sheet conveying direction, and the blade edge of the movable blade is in sliding contact with the movable blade. Sheet positioning regulation for adjusting the cutting position of the sheet to the sheet cutting position by the fixed blade and the moving blade by arranging at least a part of the fixed blade for cutting the sheet by advancing and arranging into the sheet conveying path. It is characterized in that the means is configured.

[0024]

【Example】

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. (Structure) FIG. 1 shows a main part of an image forming apparatus incorporating the sheet cutting apparatus of this embodiment. In FIG. 1, reference numeral 1 denotes a sheet conveying path, and in the sheet conveying path 1, a platen conveying means 2, a recording section 3, a sheet cutting device 4, and a sheet discharging device 5 are installed in this order from the upstream side in the conveying direction. .

The platen conveying means 2 pushes out a sheet (sheet) fed from a roll paper loaded in a sheet feeding device (not shown) to the recording section 3, which comprises a feed roller 6 and a platen roller 7. There is. The platen conveying means 2 sandwiches the sheet P between the rollers 6 and 7 and forcibly conveys the sheet P to the downstream recording unit 3.

The recording unit 3 has a first chamber 8 as suction means for sucking the sheet P and bringing it into close contact with the recording surface.
The ink jet recording heads 9 of the respective colors are arranged side by side on the front surface of the chamber 8. First
The chamber 8 has a platen surface 10 which is an outer wall of the front surface facing the sheet conveying surface of the sheet conveying path 1. The platen surface 10 is provided with a large number of through holes 11 for sucking sheets. Ink jet recording heads 9 of four colors of black (K), cyan (C), magenta (M), and yellow (Y) are arranged substantially in the transport direction of the sheet P. The nozzle portion of the ink jet recording head 9 is arranged at a distance of about 1 mm from the platen surface 9.

The ink jet recording head 9 is mounted on the carriage 12 together with an ink supply device (not shown). The carriage 12 is guided along a pair of guide shafts 13 arranged along a direction orthogonal to the sheet conveying direction, and is driven so as to reciprocate over a sheet width or more. For example, the carriage 12 is moved at the time of recording by a belt attached to a pulley connected to a drive motor (not shown). During normal standby or paper jam, it moves to the home position retracted from the sheet transport path and stops.

The sheet cutting device 4 is provided with a flat plate-shaped fixed blade 15 positioned below the sheet conveying path 1 as a boundary. The upper surface of the fixed blade 15 is provided so as to be in contact with the sheet conveying surface. A machine frame 16 of the sheet cutting device 4 is provided below the fixed blade 15. The machine frame 16 is attached and fixed to the outer wall of the first chamber 8 on the downstream side in the sheet conveying direction. As shown in FIG. 2, the fixed blade 15 and the machine frame 16 are arranged long along the width direction over the width of the conveyed sheet.

The machine frame 16 is formed by bending a metal plate. The fixed blade 15 is attached and fixed to the upper surface of the machine frame 16. That is, the fixed blade 15 is the sheet conveying path 1.
Is arranged parallel to the sheet conveying surface, the upper flat surface thereof also serves as the sheet conveying surface, and the downstream end edge portion in the sheet conveying direction serves as a blade portion for cutting the sheet. Machine frame 1
A rail portion 17 is formed at the upper end portion of 6 by bending its tip end downward, and this rail portion 17 is fixed blade 1
5 is provided linearly in parallel with the edge of the blade 5 over the sheet width.

As shown in FIG. 2, support shafts 19 for pivotally supporting the pulleys 18 are provided in the vicinity of both ends of the machine frame 16 in the seat width direction. A wire 21 is wound around each pulley 18. A lower portion of a holder 23 that holds the movable blade 22 is fixed in the middle of the wire 21. The holder 23 follows the movement of the wire 11 and moves in the sheet width direction. The holder 23 includes a rail portion 1 of the machine frame 16.
Two sets of a pair of guide rollers 24 are provided which are in rolling contact with each other with 7 in between. The sets of guide rollers 24 are installed apart from each other in the sheet width direction, and the moving blade 22 is arranged between them. The holder 23 is provided with a pair of guide rollers 24 that are in rolling contact with each other so as to sandwich the rail portion 17 of the machine frame 16. These constitute means for guiding the movement of the movable blade 22 in the sheet width direction along the blade portion of the fixed blade 15.

As shown in FIG. 2, two movable blades 22 are mounted on the holder 23. Each of these movable blades 22 is formed in a disk shape having the same diameter, and its circumferential portion serves as a blade portion. The movable blades 22 are installed so as to be displaced in the movement direction of the holder 23. Further, as shown in FIG. 3, each moving blade 22 is axially supported so as to be inclined so that the outer peripheral portion located on the leading direction side when moving is in contact with the blade portion of the fixed blade 15. Each pair of guide rollers 24 is provided on both outer sides of the two moving blades 22 in the sheet width direction. The movement range D of the holder 23 in the substantially sheet width direction is determined by the relationship between the pair of two guide rollers 24 rollingly contacting the rail portion 17 of the machine frame 16.

The means for rotationally driving the moving blade 22 is constructed as follows. That is, the moving blade 22 is coaxially provided with the rolling contact roller 26 in which the rubber ring 25 is fitted on the outer circumference, and the rubber ring 25 of the rolling contact roller 26 is one side of the transport surface of the sheet transport path 1 on the lower side. The member located at, the back surface of the fixed blade 15 in this embodiment is pressed against the back surface.
The pressing force applied to the rolling roller 26 is obtained by the holder 23 being pushed upward by the tension of the wire 21. Since the rubber ring 25 is in contact with the back surface of the fixed blade 15, the position of the holder 23 in the direction perpendicular to the seat surface is determined. The moving blade 22 is a biasing means (not shown),
For example, the coil spring 30 or the like wound around the shaft of the movable blade is pressed against the cutting blade portion of the fixed blade 15.

The paper discharge device 5 is provided on the downstream side of the sheet cutting device 1, and is provided with a paper discharge means for discharging a recorded sheet. This paper discharge means is provided with two guide plates 27 for guiding the leading edge of the conveyed sheet and a pair of paper discharge rollers 28, and the paper discharge conveyance surface is arranged almost on the extension of the platen surface 10. There is. The guide plate 27 is provided to guide the sheet P at least before and after the paper discharge roller 28 of the paper discharge means. The upstream ends of the two guide plates 27 for guiding the sheet P extend to the vicinity of the fixed blade 15, and the edge of the lower guide plate 27 is movable between the fixed blade 15 and the movable blade 22. Are arranged so as to form a gap 29 with an interval that allows passage. Upper guide plate 27
Is at a position spaced above the sheet conveying surface formed on the upper surface of the fixed blade 15. Further, the lower guide plate 27 is located at a position slightly lower than the sheet conveying surface formed by the upper surface of the fixed blade 15 and spaced apart therefrom.

A second suction chamber 31 as a second suction means is installed on the back side of the sheet cutting device 4 opposite to the sheet conveying surface. This sucks the air in the upper region from the gap 29 between the guide plate 27 through which the movable blade 22 can pass, and moves the sheet to the sheet cutting portion of the sheet cutting device 4, that is, the sheet cutting position by the fixed blade 15 and the movable blade 22. It is for adjusting the cutting position of. In other words, it constitutes a positioning regulation means or a positioning contact means for bringing the sheet into close contact with the upper surface of the fixed blade 15, especially the sheet guide surface in the vicinity of the blade portion where the blade edge of the movable blade 22 slides.
The second suction chamber 31 is provided so that the suction opening 32 is widened from the sheet cutting device 4 to the paper discharge device 5.
The air on the side of the sheet conveyance surface is sucked in over a relatively wide range,
In particular, since the gap 29 is formed between the fixed blade 15 and the lower guide plate 27, the suction through the gap 29 becomes large, and the suction action on the sheet P at the sheet cutting portion adjacent thereto becomes stronger. Therefore, the sheet is surely brought into close contact with the upper surface of the fixed blade 15. That is, the fixed blade 15
And the sheet P at the sheet cutting position by the moving blade 22.
The cutting position is closely adhered to regulate the positioning. (Operation) When the operation of the image forming apparatus is started, first, the sheet P fed from the roll paper loaded in the sheet feeding device (not shown) is forcibly forced by the rollers 6 and 7 of the platen conveying means 2 to the recording unit. 3 is intermittently pushed out, and is conveyed forward while being in close contact with the surface of the platen surface 10 due to the suction action of the first chamber 8. Then, when the leading edge of the sheet P reaches the position facing the inkjet recording head 9, the recording operation is performed. An image is recorded on the sheet while reciprocating the carriage 12 in the sheet width direction.

As the image is recorded, the leading edge of the sheet P is fed into the area of the sheet cutting device 4. Sheet P
Moves along the upper surface of the fixed blade 15 which also serves as the sheet conveying surface, and passes through the space between the guide plates 27, and the discharge roller 2 of the discharge means.
Sent to 8. At this time, the leading edge of the sheet P is the fixed blade 1.
When the moving blade 22 passes through 5 and reaches the gap 29 through which the moving blade 22 passes, the subsequent portion of the sheet P starts to be pulled by the second suction chamber 31 and is brought into close contact with the cutting blade portion of the fixed blade 15. While continuing this suction state, the sheet P advances, and the leading end side portion thereof is guided by the space between the guide plates 27 and is sent by the pair of paper discharge rollers 28 of the paper discharge means.

Since the peripheral speed of the paper discharge roller 28 is set slightly higher than that of the feed roller 6, the sheet P is not bent between the conveying means and the paper discharge means. In addition, since the conveying force of the sheet discharging unit is set to be small, the sheet P is not peeled off by overcoming the suction force of the second sucking unit.

When the predetermined recording is completed, the sheet cutting device 4 operates. That is, when at least one pulley 18 is rotationally driven by a driving unit (not shown), the wire 21 rotates, and the movable blade 22 slides in contact with the blade edge of the fixed blade 15 together with the holder 23 fixed to the wire 21. By traversing the transport area of P,
The sheet P is cut in the sheet width direction.

At this time, since the holder 23 is constantly pressed toward the fixed blade 15 side by the tension of the wire 21, the rubber ring 25 of the rolling roller 26 provided coaxially with the moving blade 22 and the back surface of the fixed blade 15 are in contact with each other. The movable blade 22 is pressed and is rotated by the frictional force. The outer diameter of the rubber ring 25 is the moving blade 2
Since the diameter of the cutting edge is smaller than 2, the relative speed between the fixed blade 15 and the moving blade 22 becomes large in the sheet cutting portion. The sheet P is cut while sandwiching the sheet P between the blade portion of the fixed blade 15 and the movable blade 22.

At the time of cutting the sheet, the conveying means and the sheet discharging means stop the conveying operation, and they have a function of sandwiching the front and rear of the sheet P and holding it so as not to move. Further, the portion to be cut of the sheet P is brought into close contact with the cutting blade portion of the fixed blade 15 by the suction force of the second suction means, and the sheet P is also sucked and held so as not to move here. Further, also in the recording unit 3, the sheet P is adsorbed and held by the suction force of the first chamber 8 so as not to move. Since the sheet P does not move across the sheet cutting portion in this way, the sheet P is cut and the moving blade 2 is cut between the cuts.
Even if 2 moves, it is not disturbed. Further, since the moving blade 22 has a small thickness, it does not adversely affect the cutting of the sheet P, and the sheet can be cut smoothly.

Further, when the paper is jammed, the carriage 12 is retracted to the outside of the sheet conveying area, and the conveying guide member near the sheet conveying path 1 is not provided from the recording section 3 to the sheet cutting section. It is possible to easily perform the paper jam processing of the sheet conveying path 1 from the recording surface side. Further, since the portion of the guide plate 27 that guides to the sheet discharging unit can be short and the guide plate 27 that is arranged in the vicinity of the moving blade 22 can be short, the sheet discharging unit can be close to the sheet cutting device 4 side. Can be arranged.

The sheet P used in the ink jet system or the heat sensitive recording system has an ink receiving layer and a color former coated on the image recording surface side. These coat layers 101 have a drawback that they are easily peeled off from the base sheet material (for example, paper or film) 102, but in this embodiment, the main body of the fixed blade 15 and the movable blade 22 is the non-image surface side. The movable blade 22 is cut from the sheet base material side of the sheet P, as shown in FIG. As a result, the chance that the moving blade 22 directly contacts the coat layer 101 is reduced, and the peeling of the coat layer 101 is reduced. That is, it is possible to reduce the amount of paper dust 103 generated due to the peeling of the coat layer 101. Further, since the amount of paper dust that jumps out to the recording surface side can be reduced, even if a recording paper without the coat layer 101 is used, the problem of adhesion to the nozzle portion of the inkjet head can be solved. This effect is the same in the examples described below. <Second Embodiment> FIG. 5 shows the structure of a second embodiment of the present invention. This embodiment is different from the above-described first embodiment in the following points. The position of the sheet cutting portion constituted by the fixed blade 15 and the movable blade 22 is arranged so as to protrude from the sheet conveying surface by d1. Further, the paper discharge roller 28 of the paper discharge means is driven to rotate at a peripheral speed higher than those of the rollers 6 and 7 of the platen conveying means 2 and at a weak nip pressure. One end of the upper guide plate 27 extends to the vicinity of the inkjet recording head 9 of the recording unit 3 in the vicinity of the sheet conveying surface. Therefore, the platen surface 10
It is possible to configure a continuous guide section from the position facing the sheet suction surface of the sheet through the position facing the sheet cutting device 4 to the sheet discharging unit 5. In the structure of this embodiment, the second suction means as described above is not provided.

Next, the operation of the second embodiment will be described. The leading end of the sheet P is a through hole 1 for sucking the sheet in the chamber 8.
It is adsorbed by 1 and pushed out on the platen surface 10.
Since one end of the upper guide plate 27 extends to the vicinity of a position facing the through hole 11 for sheet suction, the platen surface 10
The leading edge of the sheet, which has passed through the suction through hole 11 and is lifted up, is regulated and guided by the guide plate 27, and is surely guided to the sheet discharging unit 5. The guide plate 27 constitutes a guide means so as to face the guide surface on the upper surface of the fixed blade 15, and the width of the gap between the guide plate 27 and the guide surface may be a small gap through which the movable blade 22 can pass, and the guide surface from the conveying surface of the sheet conveying path. The distance can be smoothly guided only by providing a slight step. The sheet P is stretched as much as possible by the rollers 28 of the sheet discharging means whose peripheral speed is set higher than that of the rollers 6 and 7 of the platen conveying means 2 so that the slack is eliminated and the sheet P is projected to the conveying surface of the sheet conveying path 1. Adheres sufficiently to the sheet cutting part. In this state, the platen transfer means 2
And the sheet P is held by stopping the conveying operation of the sheet discharge means 5, and the upstream side and the downstream side of the sheet cutting portion are held by suction by the chamber 8, so that the sheet P does not move.
Keep close contact with the sheet cutting part. The sheet P does not rise even when the moving blade 22 crosses the sheet in the sheet width direction while cutting the sheet. <Third Embodiment> FIGS. 6 to 8 show the construction of a third embodiment of the present invention. In this embodiment, the holder 23
Is provided with an extending portion extending to the sheet conveying path 1 side from which sheet position regulating means for adjusting the cutting position of the sheet P to the sheet cutting position by the fixed blade 15 and the movable blade 22 is configured. . Therefore, a thin plate-shaped arm portion 35 extending from the holder 23 is provided. Arm part 3
Supporting stand-up part 36 that stands up from holder 23
In particular, as shown in FIG. 7, a portion near the sheet transporting surface is formed in a plate shape having a narrow protruding width vertically apart from the movable blade 22 by a distance of d2 so as to move away from the blade portion of the fixed blade 15. Has been done. The supporting rising portion 36 is arranged between the two movable blades 22.

At the upper end of the rising portion 36, a plate-like restraining portion 37 is formed so as to extend directly to the upper surface of the fixed blade 15 so as to be bent. The restraining portion 37 is shaped so as to cover all the movable blades 22. The movable blade 22 is formed in a plate-like shape extending in the direction of advance of the movable blade 22 in the moving direction. Further, the restraining portion 37 is installed on the sheet conveying surface at an interval d3 that is at least equal to the thickness of the sheet P. Then, the sheet P is pressed against the sheet cutting portion at the sheet cutting position by the fixed blade 15 and the movable blade 22 so as to be brought into close contact with the sheet cutting portion, thereby forming sheet positioning regulating means which is a pressing means for regulating the sheet positioning. Further, the lower surface of the restraining portion 37 on the sheet conveying surface side at the most distal end in each moving direction is a guide inclined surface 38.

Further, the movable blades 2 are provided on the lower surface of the restraining portion 37.
A void 39 is formed so as to allow the peripheral portion 2 to escape. The peripheral portion of each moving blade 22 enters into the space 39 on the lower surface of the restraining portion 37 and is positioned with a gap therebetween.

As shown in FIG. 6, since the restraining portion 37 has a low height from the sheet conveying surface, the upper guide plate 27 is extended so as to face the sheet conveying surface in close proximity to the sheet conveying path. The restraining portion 37 is provided so as to reciprocate within the inside 1.

Next, the operation of the third embodiment will be described. The sheet P pulled by the platen conveying means 2 and the sheet discharging means 5 is held in a state of being substantially flush with the upper surface of the fixed blade 15. The sheet cutting device 4 is activated and the wire 2
When 1 is pulled, the holder 23 starts moving in the sheet width direction. Then, the side edge portion of the sheet P is first the arm portion 3
Even if the inclined surface 38 of the restraining portion 37 of the No. 5 abuts and the sheet P is temporarily floated, the floating is suppressed, and the fixed blade 15
Ensure a substantial adherence to. Sheet P has fixed blade 1
Since the movement is restricted within the gap d3 between the holding portion 37 and the holding portion 37 and does not float up, the fixed blade 15 and the moving blade 22 are smoothly cut as described above. When a plurality of moving blades 22 are provided with different cutting directions, the supporting rising portion 36 of the arm portion 35 slightly projects from the moving blade 22, and this is the sheet of the sheet cutting portion. It is possible to prevent the edge from coming into contact with the remaining moving blades 22 that do not contribute to cutting, and reduce the generation of paper dust. <Fourth Embodiment> This embodiment is a modification of the third embodiment described above. As shown in FIG. 9, the holding portion 3 is attached to the tip of the supporting rising portion 36 that is raised from the holder 23.
7 is a separate member. The restraining portion 37 which is a separate member is attached movably in a direction substantially perpendicular to the sheet conveying surface, and is elastically biased toward the fixed blade 15 side by the biasing means of the leaf spring 41. In this case, there is no gap between the fixed blade 15 and the holding portion 37 on the arm portion 35 side, and the movement accompanying the cutting operation of the holder 23 causes
The inclined portion 38 of the arm portion 35 lightly rides on the seat P,
Following this, the pressing portion 37 presses the sheet P and makes sliding contact with it. The leaf spring 41 is set to have an extremely weak force, and the arm portion 35 is entirely made of a material having a low friction coefficient such as plastic. Therefore, the contact between the restraining portion 37 and the sheet P causes the sheet P to move. Never. <Fifth Embodiment> FIG. 10 shows the structure of a fifth embodiment of the present invention. Fixed blade 1 in this sheet cutting device 4
The relationship between the movable blade 22 and the movable blade 22 is the same as that of the first to fourth embodiments described above, but as shown in FIG. The sheet conveying path 1 is composed of the upper guide plate 51, the fixed blade 15 and the two guide plates 27 on the downstream side. The fixed blade 15 and the lower guide plate 27 are arranged with a step, and the movable blade 22 enters the sheet conveying path 1 through a gap 29 formed between them. Guide plate 51
Is rotatable about the shaft supporting portion 52 provided at the downstream end thereof in the direction to open the sheet conveying path 1 upward.

Further, the guide plate 51 is provided with an escape portion 53 which is opened so that the moving blade 22 can penetrate the sheet conveying path 1 over the moving width of the moving blade 22. Although the main body of the moving blade 22 is outside the sheet conveying path 1, the blade edge thereof has entered the relief portion 53. On the lower surface of the guide plate 51, pressing means 54 for pressing the sheet P toward the upper surface of the fixed blade 15 near the sheet cutting portion is provided. The pressing means 54 is made of, for example, an elastic thin material such as a film, and is attached to the lower surface of the guide plate 51 in a state where the free end side is lowered from the upstream side to the downstream side of the transport path.
The guide plate 51 constitutes means for pressing the sheet P with a weak force from above so that the sheet P is closely attached to the sheet cutting portion.

With such a structure, the guide plate 51
The escape portion 53 in the above may be a slight gap or a step through which the moving blade 22 can pass, and a relatively narrow sheet conveying guide is formed by the upper surface of the fixed blade 15 and the lower surface of the guide plate 51 over the entire sheet cutting portion. Even if the pressing unit 54 is not provided, the sheet P can be restricted to the fixed blade 15 side and the floating of the sheet P can be suppressed. Further, unlike the third embodiment described above, it is possible to prevent the sheet P from floating up without providing an extending portion or an arm from the holder 23 side. Here, since the pressing means 54 for pressing the sheet P in the vicinity of the sheet cutting portion is provided on the guide plate 51 side, the floating prevention of the sheet P can be strengthened even in the case of a strong sheet P such as thick paper. At the same time, the sheet P is moved by the moving blade 2.
It is possible to regulate the movement in the moving direction of 2, and it is possible to cut the sheet satisfactorily while closely contacting the sheet cutting portion. Moreover, as shown in FIG.
Can be opened independently of the sheet cutting device 4, so that it is possible to easily deal with paper jams.

Further, in this embodiment, the unit of the sheet cutting means 4 is constructed so as to be attachable to and detachable from the sheet conveying path. FIG. 10B shows an operation in which the unit of the sheet cutting means 4 is attached to and detached from the sheet conveying path 1. The sheet can be attached to and detached from the outer side (lower side) of the sheet conveying path 1 without changing the relationship between the fixed blade 15 and the movable blade 22 and without removing other guide means. The cutting device 4 can be easily replaced and maintained. <Sixth Embodiment> FIGS. 11 to 13 show a sixth embodiment of the present invention. In each of the embodiments described above, the rolling contact roller 26 of the moving blade 22 is brought into rolling contact with the back surface (lower surface) of the fixed blade 15 and the moving blade 22 is rotationally driven by the frictional force. In the method of each of the above-described embodiments, the movable blade 22 does not always rotate in the direction in which the sheet P is wound and sandwiched between the fixed blade 15 and the movable blade 22, so burrs are likely to be generated from the cut surface of the sheet. In the sixth embodiment, means is adopted to improve this.

That is, the moving blade 22 has a rolling roller 26.
Instead of, the pinion 61 is provided coaxially and integrally. Machine frame 16
Is provided with a support arm 63 for supporting a rack 62 with which the pinion 61 is engaged. The rack 62 is arranged along the moving direction of the moving blade 22 over the moving range or more. The holder 23 is constantly urged by the tension of the wire 21 in the direction in which the pinion 61 engages with the rack 62. Therefore, as the wire 21 moves, the holder 23 follows, and at this time, the pinion 61 attached to the holder 23 meshes with the rack 62 on the fixed side, so that the moving blade 22 rotates.

As shown in FIG. 12, the rack 62 is located below the movable blade 22, and the fixed blade 15 is sandwiched by the movable blade 22.
Since the movable blade 22 is on the opposite side, the rotational direction of the movable blade 22 is a direction in which the sheet P is wound into the fixed blade 15 side, and as shown in FIG. 13, the fixed blade 15 and the movable blade 22 cut the sheet P. Cut it so that the part is sandwiched and rolled up. With this structure, burrs and the like at the time of cutting are eliminated. The way the paper dust is discharged in this embodiment is as shown in FIG. Since the movable blade 22 directly touches the coat layer 101 of the sheet P, the paper dust 103 is relatively likely to come out as compared with those of the above-described respective embodiments. However, since the paper dust 103 is ejected in the direction opposite to the recording surface of the sheet P, the paper dust 10 is applied to the inkjet recording head 9 of the recording unit 3, for example.
The possibility that 3 will adhere is considerably smaller than the conventional one.

Further, in this embodiment, the roller 7 of the platen conveying means is arranged in the region of the chamber 8 and the front surface of the chamber 8 is utilized as a sheet conveying surface as much as possible to enhance the sheet guide function.

Although the moving blade 22 is rotated by using the rack and pinion mechanism in this embodiment, the present invention is not limited to this in order to obtain the function and effect of this embodiment. As shown in the fourth embodiment, the movable blade 22 may be rotated by the roller mechanism so that the sheet P can be rotated in the direction in which the sheet P is sandwiched between the movable blade 22 and the fixed blade 15.

The means for restricting the sheet to the sheet cutting portion of the sheet cutting device of the present invention and closely contacting the sheet with the sheet cutting portion are not limited to those in the above-mentioned embodiments, and for example, The same effect can be obtained even if the sheet is pressed against the cutting portion by the air blowing means or is adsorbed by static electricity.

The location of the sheet cutting device is
The present invention is not limited to between the recording means and the paper discharge means, and can be carried out in any conveyance path having a sheet cutting device.

The arrangement on the non-recording surface side is not limited to the arrangement on the downstream side of the recording portion, and the same effect can be obtained by arranging on the upstream side. Although the ink jet recording apparatus has been described as an example of the recording means, the same effect can be obtained in the thermal transfer system and the thermal recording system. <Additional Effects of Embodiments> According to the above-described embodiments,
At least the following operational effects can be obtained. Moving blade 2
Since 2 is arranged on the fixed blade 15 side, it is not necessary for the supporting portion of the movable blade 22 of the holder 23 to extend through the sheet conveyance path 1 for a long time, and the movable blade near the rolling roller 26 and the machine frame 16 does not need to extend. A configuration that surely supports 22 is possible. For this reason,
The fixed blade 15 and the movable blade 22 come into stable and reliable contact, and smooth sheet cutting is possible. Further, since the support portion can be formed at the above-mentioned location, the support strength can be increased, and the problem that the support portion of the movable blade 22 is broken during handling such as maintenance can be eliminated.

Since the main part of the movable blade 22 moves outside the sheet conveying path, it is possible to adopt a structure in which the guide member forming the sheet conveying path is continuously arranged before and after the sheet cutting section. The sheet can be stably conveyed. In addition, it is possible to reduce the cost by reducing the number of parts and prevent paper jams. Moving blade 2
The main part of 2 moves outside the sheet conveying path, and the fixed blade 15
By bringing the sheet into close contact with the second suction means 31, the guide member for guiding the sheet to the paper discharge device 5 can be set short. As a result, it becomes possible to bring the sheet discharging device 5 closer to the sheet cutting portion and to make the sheet conveying path 1 shorter, and the device to which this is applied can be made compact.

Since the sheet cutting section is arranged so as to protrude from the conveying surface determined by the conveying paths before and after the sheet cutting section, and the sheet is pulled to regulate the sheet cutting section so that the sheet does not float from the sheet cutting section, the sheet cutting section is cut. It has become possible to perform the operation stably and smoothly. From the holder 23 of the moving blade 22 to the restraining portion 37
The arm portion 35 for holding the sheet is arranged so as to penetrate the conveying surface of the sheet conveying path 1, and the holding portion 37 cuts the sheet while controlling the position for suppressing the floating of the sheet. Stable cutting is possible without the need to significantly project from the surface. Further, the supporting arm portion 35 also plays a role of a cover of the movable blade 22, and it is possible to prevent an injury caused by inserting a finger between the fixed blade 15 and the movable blade 22.

A supporting arm portion 35 is arranged from the holder 23 of the movable blade 22 so as to penetrate the sheet conveying path 1, and a holding member 37 is provided on the supporting arm portion 35, and the holding member 37 is attached to the fixed blade 15 side. Since it is elastically urged to, it is possible to reliably guide sheets of any thickness and perform stable sheet cutting. The holding portion supporting arm portion 35 is arranged from the holder 23 of the moving blade 22 so as to penetrate the conveying surface of the sheet conveying path 1, and the position of the arm portion 35 in the sheet conveying surface direction near the sheet cutting portion is set to the moving blade 22. By projecting the movable blade 22 away from the fixed blade 15 more than the fixed blade 15, even when the movable blade 22 is moved in a direction that does not contribute to cutting, the movable blade 22 and the sheet slide to generate a large amount of paper dust. Could be prevented.

Since the fixed blade 15 and the movable blade 22 are arranged on the non-recording surface side of the sheet conveying surface, it is possible to reduce the amount of paper dust protruding to the recording surface side. Fixed blade 15 and movable blade 2
Since 2 and 2 are arranged on the non-recording surface side of the sheet conveying surface, and the recording means can be retracted from the sheet conveying path 1, it is possible to easily perform the paper jam processing from the recording surface side.

Since the sheet cutting device 4 is constructed so as to be attachable / detachable from the outside of the sheet conveying path 1 without removing another conveying guide member, replacement and maintenance are facilitated. While the positional relationship between the fixed blade 15 and the movable blade 22 of the sheet cutting device 4 is maintained, the conveyance guide member of the sheet cutting portion can be opened independently, so that the paper jam processing of the sheet cutting portion is facilitated.

Since the means 54 for pressing the sheet to the sheet cutting device side is provided on the side of the conveyance guide facing the sheet cutting device over the sheet width or more, even a strong sheet such as thick paper can be provided without providing a new contacting means. It became possible to cut smoothly without rising from the sheet cutting part.

Since the moving blade 22 is rotated in the direction in which the sheet is wound around the fixed blade 15, the sheet can be smoothly cut without floating from the cutting portion without providing new contact means. [Additional Notes] 1. In a sheet cutting device that cuts a sheet conveyed in a sheet conveying path, a fixed blade located on one side of the sheet conveying surface with the conveying surface of the sheet conveying path as a boundary, and a blade portion along the fixed blade. A moving blade for moving and cutting the sheet, and a guide means for guiding the moving blade along the fixed blade are arranged, and further, a positioning regulation for aligning the sheet with a sheet cutting position by the fixed blade and the moving blade. A sheet cutting device comprising means. 1-1. In a sheet cutting device that cuts a sheet conveyed in a sheet conveying path, a fixed blade located on one side of the sheet conveying surface with the conveying surface of the sheet conveying path as a boundary, and a blade portion along the fixed blade. A sheet cutting apparatus comprising: a moving blade that moves and cuts the sheet; and a guide unit that guides the moving blade along the fixed blade.

According to these, the fixed blade, the movable blade and the guide means are installed on one side of the sheet conveying surface,
In particular, it is possible to prevent the constituent members of the movable blade and the guide means from significantly protruding or crossing over the conveying surface of the sheet conveying path, and it is possible to suppress the height of the portion protruding to the sheet conveying surface as low as possible. Moreover, the support of the movable blade is stable, and the support strength can be easily increased. Since the sheet is regulated so as to be located at the position of the sheet cutting section, the sheet does not float from the sheet cutting section when the sheet is cut and can be cut reliably. By disposing the fixed blade and the movable blade on one side of the sheet conveying surface, the sheet cutting device can be integrally attached and detached from one side of the sheet conveying path. Further, by making the portion of the sheet guide means facing the sheet cutting device movable, it becomes possible to look into the sheet cutting portion without changing the positional relationship between the fixed blade and the movable blade. Further, the number of parts is reduced and the cost is reduced, and the paper jam does not occur.

2. In a sheet cutting device that cuts a sheet conveyed in a sheet conveying path, a fixed blade is located on one side of the conveying surface of the sheet conveying path as a boundary, and a fixed blade is rotated along the blade portion of the fixed blade. While arranging a movable blade that moves while cutting the sheet, a guide means that guides the movable blade along the fixed blade, a support member that supports the movable blade, and a moving means, further, the fixed A sheet cutting apparatus, comprising: a positioning regulation unit that aligns the sheet at a sheet cutting position by a blade and the movable blade. In addition to the above-mentioned item of Supplementary Note 1, the sharpness of sheet cutting is enhanced by rotating the movable blade.

3. The positioning regulation means is provided with suction means on one side of the sheet conveying surface where the fixed blade and the movable blade are located in the sheet conveying path, sucks the sheet on the sheet conveying path, and positions the sheet at the sheet cutting position. The sheet cutting device according to the above-mentioned items 1 and 2, wherein the sheet cutting device is combined. Since the sheet is regulated to be in close contact with the sheet cutting portion so as not to float, it is possible to stably and reliably cut the sheet.

4. The positioning regulation means arranges at least the sheet cutting position by the fixed blade and the movable blade so as to project to a position higher than the conveying surface of the sheet conveying path on the upstream side and the downstream side thereof, so that the sheet cutting position is set at the sheet cutting position. Note 1 characterized by aligning the sheets,
The sheet cutting device according to item 2. Since the sheet is regulated to be in close contact with the sheet cutting portion so as not to float, it is possible to stably and reliably cut the sheet. The sheet cutting unit does not need to protrude slightly from the conveying surface, and the sheet guiding unit is brought close to the sheet conveying surface from the upstream side to the downstream side in the conveying direction sandwiching the sheet cutting unit without interfering with the conveying guides of the sheet conveying path. It is possible to provide seat guide means.

5. At a position facing the sheet cutting section,
The sheet cutting device according to any one of claims 1 to 4, further comprising sheet guiding means for guiding the sheet from the upstream side to the downstream side of the sheet cutting portion. The guide function of the sheet near the sheet cutting portion is enhanced.

6. In a sheet cutting device for cutting a sheet conveyed in a sheet conveying path, a fixed blade is located on one side of the conveying surface of the sheet conveying path as a boundary, and a fixed blade is moved along the blade portion. Then, the main body of the movable blade that cuts the sheet, the guide means that guides the movable blade along the fixed blade, and the support member that supports the movable blade are arranged, and further extend from the support member. And a part of the extending portion and the movable blade penetrates through the sheet conveying surface and protrudes to the other side of the sheet conveying surface, and the extending portion has a sheet cutting portion for cutting the portion of the sheet to be cut. The sheet cutting device is provided with a sheet regulating means for regulating at a position of, and the blade edge of the movable blade projects in a direction away from the sheet regulating surface beyond the fixed blade. Since the sheet is regulated so as to be in close contact with the sheet cutting portion, the sheet does not float from the sheet cutting portion when the sheet is cut.

7. 7. The sheet cutting apparatus according to appendix 6, wherein the sheet regulating means is constituted by a biasing means that elastically presses the sheet toward the fixed blade side. Since the sheet regulation surface is elastically pressed toward the fixed blade side, it is possible to prevent the sheet surface from floating without difficulty regardless of the thickness of the sheet.

8. The support member holds a plurality of moving blades, and the columns of the extending portion are arranged between the moving blades,
Item 8. The sheet cutting apparatus according to Item 6 or 7, wherein the extending portion in the sheet conveying surface direction orthogonal to the sheet cutting direction is shaped to project from the fixed blade in a direction away from the fixed blade. . No fingers get stuck between the movable blade and fixed blade during maintenance.

9. The moving direction edge of each moving blade is held so as to contact the fixed blade at an angle, and at least the position of the supporting portion in the sheet conveying direction on the sheet conveying surface is away from the cutting edge of the fixed blade from the moving blade. The sheet cutting apparatus according to item 8, wherein the sheet cutting device also protrudes. With this configuration, it is possible to prevent the edge portion of the moving blade, which is not involved in the cutting, from slidingly contacting the sheet during the cutting of the sheet.

10. Item 10. The sheet cutting apparatus according to any one of items 1 to 9, further comprising a unit for recording an image on the sheet, wherein the fixed blade is arranged on a non-recording surface side. The fixed blade and the movable blade, and the moving blade guide means are arranged on the non-recording surface side, and the moving blade is at a position where part of the moving blade protrudes from the fixed blade toward the recording surface. Meanwhile, since the sheet is cut, the peeling of the coat layer is reduced by cutting from the non-recording surface side of the recording paper provided with the coat layer on the surface. Even in a sheet having no coat layer, paper dust is prevented from scattering toward the recording means. 11. 11. The sheet cutting apparatus according to appendix 10, wherein the recording unit is an inkjet recording device.

12. In a sheet cutting device for cutting a sheet conveyed in a sheet conveying path, a guide means having a pair of guide surfaces facing each other to form the sheet conveying path, a fixed blade and a movable blade, A movable blade in which a blade edge enters into the sheet conveying path from the outside of one guide surface of the means and is movable in a direction orthogonal to the sheet conveying direction, and a fixed blade for cutting the sheet by sliding contact with the movable blade. A sheet cutting apparatus, wherein at least a part of the sheet is inserted into the sheet conveying path and disposed so as to constitute a regulating means for bringing the sheet into close contact with the fixed blade side.

13. In a sheet cutting device that cuts a sheet conveyed in a sheet conveying path, a sheet guiding unit that constitutes the sheet conveying path, a fixed blade and a movable blade,
From the outside of the sheet guiding means into the sheet conveying path, at least a part of the fixed blade is arranged to be arranged, and the movable blade is arranged so as to penetrate the conveying surface of the sheet conveying path from the fixed blade side, A sheet cutting apparatus, wherein a movable blade cuts the sheet while slidingly contacting the fixed blade.

14. The movable blade rotates and slides against the fixed blade to cut the sheet, and the drive means for rotating the movable blade moves a roller that is in contact with the surface of the member located on the back side of the fixed blade. 14. The sheet cutting apparatus according to any one of appendices 1 to 13, further comprising a transmission mechanism that transmits the rotation of the roller when the blade is moved to the moving blade. 15. The movable blade rotates and slides against the fixed blade to cut the sheet, and the drive means for rotating the movable blade moves the movable blade and a rotating body that contacts the member different from the fixed blade. 14. The sheet cutting device according to any one of Supplementary Notes 1 to 13, further comprising a transmission mechanism that transmits the rotation of the rotating body to the moving blade at that time. 16. 16. The sheet cutting apparatus according to appendix 15, wherein the rotating body is a pinion, and the member rollingly contacting the rotating body is a rack. 17． The movable blade rotates in a direction in which a blade edge of a peripheral portion in sliding contact with a fixed blade winds a sheet.
A sheet cutting device according to items 4, 15, and 16. It is possible to smoothly cut the sheet without lifting the sheet from the cutting section without providing a means for closely positioning the sheet on the new sheet cutting section. Of course, a sheet positioning regulation means may be added.

[0077]

As described above, according to the present invention, it is possible to suppress the generation of paper dust and cut a sheet with a narrow cut. Further, it is possible to easily make the support mechanism of the movable blade into a structure having high strength, and therefore,
The fixed blade and the movable blade come into stable contact with each other, and reliable and smooth sheet cutting is possible. Further, it is possible to eliminate the problem that the supporting portion of the movable blade is broken. Further, since the guide mechanism for the moving blade and the drive mechanism including the supporting mechanism can be compactly installed on the back side of the fixed blade, the sheet guiding means is incorporated on the front side of the fixed blade to enhance the sheet guiding function. The design of etc. becomes easy. Paper jam processing and the like can be easily performed from the recording surface side.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an apparatus incorporating a sheet cutting apparatus according to a first embodiment as seen from a side of a sheet conveying path.

FIG. 2 is an explanatory view of the configuration of the sheet cutting device as viewed from the sheet conveying path direction.

FIG. 3 is an explanatory view of the configuration of the sheet cutting unit of the sheet cutting apparatus as viewed from above.

FIG. 4 is a sectional view showing a cut state of a sheet by the sheet cutting apparatus.

FIG. 5 is a cross-sectional view of an apparatus incorporating the sheet cutting apparatus of the second embodiment as seen from the side of a sheet conveying path.

FIG. 6 is a cross-sectional view of an apparatus incorporating the sheet cutting apparatus of the third embodiment as seen from the side of a sheet conveying path.

FIG. 7 is a structural explanatory view of the sheet cutting unit of the sheet cutting apparatus as seen from above.

FIG. 8 is a sectional view of the sheet cutting device as viewed from the sheet conveying path direction.

FIG. 9 is a cross-sectional view of a sheet cutting device according to a fourth embodiment as seen from the sheet conveying path direction.

FIG. 10 is a sectional view of an apparatus incorporating the sheet cutting apparatus of the fifth embodiment as seen from the side of a sheet conveying path.

FIG. 11 is a cross-sectional view of an apparatus incorporating the sheet cutting apparatus of the sixth embodiment as seen from the side of the sheet conveying path.

FIG. 12 is a perspective view of a sheet cutting unit of the sheet cutting apparatus.

FIG. 13 is a sectional view showing a cut state of a sheet by the sheet cutting apparatus.

FIG. 14 is a cross-sectional view of a device incorporating a conventional sheet cutting device as seen from the side of a sheet conveying path.

FIG. 15 is a configuration diagram of the conventional sheet cutting device as viewed from the sheet conveying path direction.

FIG. 16 is a sectional view showing a cut state of a sheet by the sheet cutting apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet conveying path, 2 ... Platen conveying means, 3 ... Recording part, 4 ... Sheet cutting device, 5 ... Paper discharge device, 8 ... First chamber, 9 ... Ink jet recording head, 10 ... Platen surface, 15 ... Fixed Blade, 16 ... Machine frame, 17 ... Rail part,
21 ... Wire, 22 ... Moving blade, 23 ... Holder, 24 ... Guide roller, 26 ... Rolling roller, 27 ... Guide plate, 28
... Paper discharge roller, 29 ... Gap, 31 ... Second suction chamber, P ... Sheet.

Claims (3)

[Claims] 1. A sheet cutting device for cutting a sheet conveyed in a sheet conveying path, wherein a fixed blade is provided on one side of the sheet conveying surface with the conveying surface of the sheet conveying path as a boundary, and the fixed blade. A moving blade that moves along the blade portion and cuts the sheet, and a guide unit that guides the moving blade along the fixed blade are arranged, and further, at the sheet cutting position by the fixed blade and the moving blade, A sheet cutting apparatus comprising a sheet positioning regulation means for adjusting a cutting position of a sheet. 2. A sheet cutting device for cutting a sheet conveyed in a sheet conveying path, wherein a fixed blade is located on one side of the conveying surface of the sheet conveying path as a boundary, and a blade is provided on the fixed blade. A movable blade main body that moves along the section to cut the sheet, a guide means that guides the movable blade along the fixed blade, and a support member that supports the movable blade are arranged, and further, the support An extending portion extending from the member is provided, and a part of the extending portion and the movable blade penetrates the sheet conveying surface and projects to the other side of the sheet conveying surface, and the extending portion of the sheet to be cut. A sheet positioning regulation means for regulating the position of the portion at the sheet cutting position by the fixed blade and the movable blade is provided, and the blade edge of the movable blade protrudes in a direction away from the sheet positioning regulation surface beyond the fixed blade. Shi Door cutting device. 3. A sheet cutting device for cutting a sheet conveyed in a sheet conveying path, and a guide means having a pair of guide surfaces facing each other to form the sheet conveying path.
A movable blade that has a fixed blade and a movable blade, and is movable in a direction orthogonal to the sheet conveying direction with the blade tip entering the inside of the sheet conveying path from the outside of one guide surface of the guide means, By arranging at least a part of the fixed blade for cutting the sheet by sliding contact of the blade tip into the sheet conveying path, the cutting position of the sheet is set at the sheet cutting position by the fixed blade and the movable blade. A sheet cutting device comprising a sheet positioning regulation means for matching.