JP2001347485A - Separate type slide sheet cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separate type slide cutter equipped with separable movable blade and fixed blade and capable of performing a sure and satisfactory cutting. SOLUTION: In this cutter, a movable blade 11 and a fixed blade 21 are separably arranged, the support part 22 of the fixed blade 21 is supported on the receiving part 32 of a blade retaining member 31, and both the cutting edges are energized by an energizing member (plate spring) 33 integrally molded on the blade retaining member 21 so as to be mutually pressed in contact. A clearance is provided between the support part 22 and the receiving part 32, so that the lateral directional pressing force of both the cutting edges are evenly corrected so that a satisfactory cutting can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus used for a printer, a recording apparatus, or the like, which cuts a roll paper or a folded continuous sheet into a full width (full cut) or cuts an uncut part (partial cut). The present invention relates to a separation type slide type sheet material cutting device in which a movable blade and a fixed blade are arranged so as to be separable.

[0002]

2. Description of the Related Art As a sheet material cutting device used for a printer, a recording device, or the like, a slide type sheet material for cutting by moving a movable blade having a V-shaped concave edge on a fixed blade having a straight edge in an intersecting manner. Cutting devices are often used. (For example, Japanese Unexamined Patent Publication No. Hei 4-300198, Japanese Utility Model Laid-Open Publication No.
No. 9 publication).

[0003] In such a slide type cutting apparatus, the pressure contact state between the movable blade and the fixed blade greatly affects the cutting state. In other words, good cutting cannot be performed unless the pressing force of both cutting edges is sufficient, but if the pressing force is too large, there is a problem that the friction between the movable blade and the fixed blade increases. Further, if the pressing force of the blade in the blade width direction is not uniform, good cutting cannot be performed.
Therefore, in order to perform good cutting, it is necessary to apply an appropriate and uniform pressing force in the blade width direction of the blade.

On the other hand, if the movable blade and the fixed blade are provided on an integral frame, there is an inconvenience that the sheet material to be cut must be set in a narrow gap between the two blade edges. A separation type sheet material cutting device provided with a blade and a fixed blade separated from each other is used (for example, Japanese Patent Application Laid-Open No. 2000-61881).

[0005]

The above-mentioned pressing force of the blade depends on the parallelism of the mounting of the two blades. However, it is difficult to mount the two blades with high accuracy in the separation type cutting apparatus. There is a problem that it is difficult to obtain good cutting due to a difference in the pressing force in the width direction.

[0006] Further, the pressing force is performed by a spring or the like, but there is a problem that it is difficult to install a biasing means such as a spring in a narrow gap with the demand for downsizing of the device.

Therefore, the present invention solves the above problems,
It is an object of the present invention to provide a separation type slide type sheet material cutting device which can make an urging spring integral with a blade holding member and reduce the size thereof, and can perform a good cutting even when the mounting accuracy of the blade is insufficient.

[0008]

In order to achieve the above object, a separation type slide type sheet material cutting apparatus according to the present invention comprises a movable blade having an inverted V-shaped concave tip line cross-slidable with a fixed blade. In the slide-type sheet material cutting device that cuts the sheet material, the movable blade and the fixed blade are disposed so as to be separable, and at least one of the movable blade and the fixed blade is provided with two or more support portions, The two blade edges are urged by an urging member so as to be in pressure contact with each other, and the support portion is swingably supported by a receiving portion of the blade holding member, and a play gap is provided between the support portion and the receiving portion. Then, the pressure is corrected so that the pressing force of the two cutting edges in the blade width direction becomes uniform.

That is, at the time of cutting, the inverted V-shaped cutting edge of the movable blade and the straight cutting edge of the fixed blade are in contact at two symmetrical points with the V-shaped vertex as the center, but the mounting accuracy of the blade is insufficient as described above. In this case, a difference occurs in the pressure contact force of the contacts, resulting in poor cutting in the width direction. In order to correct this, according to the present invention, since a play gap is provided between the support portion of the blade and the receiving portion of the blade holding member, the mounting accuracy of the blade is poor, and a difference occurs in the pressing force in the blade width direction. Then, the blade is moved and the pressing force in the width direction is automatically corrected to be uniform. In addition, the blade is swingably supported and urged so that both cutting edges are pressed against each other, so that a uniform and proper pressing force can be obtained in the width direction, and good cutting can be performed even if the mounting accuracy is insufficient. it can.

Further, in the separation type slide type sheet material cutting apparatus according to the present invention, the movable blade may be disposed on a discharge side of the sheet material to be cut.
It is preferable that the fixed blade is located on the insertion side, and the fixed blade is separably disposed so as to open to the discharge side of the sheet material around the side opposite to the blade edge as a rotation center.

As described above, when the movable blade is disposed on the discharge side of the sheet material and the fixed blade is disposed on the insertion side, when the sheet material is cut, the leading end of the sheet material on the insertion side always remains at the position of the fixed blade. Then, the next sheet material is smoothly fed. Conversely, if the movable blade is disposed on the sheet material insertion side and the fixed blade is disposed on the discharge side, the cut end of the cut sheet material remains at the position of the fixed blade, but the leading end of the sheet material on the insertion side. Is pushed away from the blade by the movable blade, so that the next sheet material cannot be fed. Therefore, since the potential of the paper jam increases, it is desirable to dispose the fixed blade on the insertion side of the sheet material as described above.

On the other hand, for example, when the movable blade and the fixed blade are separately provided on the fixed base frame and the cover frame that opens and closes, the fixed blade that is lighter than the heavy movable blade with the drive unit is provided. It is desirable to provide it on the frame. However, as described above, when the fixed blade is positioned on the sheet material insertion side and the cover frame is opened to the discharge side, the fixed blade guides the engagement of the fixed blade provided on the movable blade with the cutting edge. The cover frame cannot be opened because of the interference of the guide portion.

In view of this, the movable blade is provided with a guide portion projecting from both ends of the width of the cutting blade to guide the engagement of the fixed blade with the cutting edge. It is desirable to bend so as not to interfere when separating by opening to the side.

For example, when the cover frame is opened, if the tip of the guide portion of the movable blade is curved so as to deviate from the arc drawn by the cutting edge of the fixed blade, the cover frame can be easily opened and closed. Further, if the distal end of the guide portion is curved, even if the movable blade and the fixed blade are separated from each other at the standby position, the movable blade and the fixed blade are smoothly cross-pressed in the cutting operation, so that a smooth cutting can be performed.

The movable blade or the fixed blade or the blade holding member is made of an elastic plate material, and the urging member is formed integrally with the movable blade or the fixed blade or the blade holding member. desirable.

If the urging member, for example, a leaf spring, is integrally formed with the blade holding member or the like in this manner, the urging member can be easily installed even in a narrow place, so that the apparatus can be downsized. Further, by selecting a position and a shape to be integrally processed, an appropriate position and an appropriate pressure to be urged can be easily selected.

In addition, one or both of the movable blade and the fixed blade are preliminarily formed in a V-shape with the vertex of the V-shaped tip of the movable blade or substantially the center in the width direction of the fixed blade being a vertex, Desirably, the convex portion is disposed so as to face the counterpart blade.

In this way, the blades always cut at an intersection angle (an angle formed by both blade edges projected on the plane of the sheet material to be cut) from the start to the end of the cutting, so that the blades are worn. Also, the sharpness is maintained and good cutting can be performed. In particular, sharpness is improved at the top of the V-shaped blade of the movable blade.

It is preferable that one or both of the movable blade and the fixed blade be made of a plate having elasticity and be provided with a bending means for bending the plate so as to be convex with respect to the counterpart blade. In this manner, if the blade is bent in a convex shape and pressed against the blade, a necessary crossing angle is obtained at the time of cutting as described above, and even if the blade is worn, sharpness can be maintained and good cutting can be performed as described above.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a cross-sectional view of a separation-type sliding sheet material cutting apparatus in which a fixed blade according to an embodiment of the present invention is disposed on an opening / closing cover (cover frame).

Referring to FIG. 1, the overall structure of the separation type slide type sheet material cutting apparatus of the present invention will be described. A print head 5 is provided on the base frame 1, and a roll recording paper (sheet material) S is stored in a recording paper storage unit 3. Above the print head 5, a movable blade 11, which will be described in detail later, is provided.

The cover frame 2 is supported on the base frame 1 by a hinge 2a so as to be openable and closable, and is locked by locking means (not shown) when the cover is closed as shown by a solid line in the figure. The cover frame 2 is provided with a fixed blade 21 and a rubber roller 4 rotatably supported. When the cover is closed as shown by the solid line in FIG. 1, the fixed blade 21 and the movable blade 11 of the base frame 1 correspond to each other, and the rubber roller 4 is located at a position corresponding to the print head 5. A paper passage 6 is formed between the leading end and the base frame 1.

The movable blade 11 has an inverted V as shown in FIG.
The roll paper (sheet material) S inserted between the movable blade 11 and the blade edges 11a and 21a of the fixed blade 21 is cut by being moved and driven by driving means (not shown). .

In the above configuration, the roll paper S is drawn out from the roll paper storage section 3 by opening the cover frame 2 as shown by a chain line in the figure and closed as shown by a solid line, whereby the roll paper S is Between the movable blade 11
And between the fixed blade 21 and the paper feed port 6.
Thereby, printing and automatic cutting are performed.

As described above, in the sheet material cutting apparatus according to the present invention, since the fixed blade 21 is provided on the cover frame 2, the movable blade having a driving portion and having a heavy weight is provided on the cover frame 2. In comparison, the load on the cover frame is reduced, and the cover frame is lightweight and easy to open and close.

Here, the fixed blade 21 of the cover frame 2 is disposed on the insertion side (lower side) of the sheet material, and the movable blade 11 of the base frame is disposed on the discharge side (upper side) of the sheet material. Then, the leading end of the sheet material on the insertion side after cutting always remains at the position of the fixed blade, so that the next sheet material is smoothly fed. Conversely, if the movable blade is on the side where the sheet material is inserted,
Since the leading end of the sheet material on the insertion side after cutting is pushed by the movable blade edge and separates from the blade, the next sheet material cannot be fed. Therefore, it is desirable to dispose the movable blade and the fixed blade as in the present embodiment.

On the other hand, when the fixed blade 21 is inserted into the insertion frame and the cover frame 2 is opened to the ejection side as in the present configuration, the fixed blade 21 is provided on the guide portion 13 provided on the movable blade 11 (FIGS. 1 and 3). ), The cover frame cannot be opened. Therefore, in the first embodiment, a guide unit as described below is provided.

[Embodiment 1] In Embodiment 1, a movable blade is provided as shown in FIG.
A guide portion for guiding sliding with a fixed blade having a shape as shown in FIG. That is, the cutting blade 11a of the movable blade 11
At the both ends of the width, a guide portion 13 for guiding engagement of the fixed blade 21 with the cutting edge 21a is provided so as to protrude therefrom.
Is curved in a direction away from the fixed blade 21.

As described above, the tip 13 of the guide portion is fixed to the fixed blade 2.
The cover frame 2 can be opened and closed without hindrance if the blade edge of one is curved so as to deviate from the arc drawn when the cover frame 2 opens. Further, if the guide portion distal end 13 is curved, even if the movable blade and the fixed blade are separated at the standby position, the movable blade and the fixed blade smoothly intersect and pressure-contact with each other in the cutting operation, so that a smooth cutting can be performed.

[Embodiment 2] Next, the structure of the blade and the urging member, which are features of the present invention, will be described. FIG. 3 is a perspective view showing the structure of the blade and the urging member of the second embodiment, and FIG. 4 is a side sectional view of FIG.

In the figure, the fixed blade 21 is made of a strip-shaped thin steel plate elongated in the blade width direction, has a cutting edge 21a on one side of the strip, and has two protruding support portions 22 near both ends on opposite sides. Is provided.

The fixed blade holding member (knife holding member) 31
It is made of a member having a U-shaped cross section having a bottom side and a rising side, and ears 35 at both ends of the bottom side are fixed to the base frame 1 with screws or the like. Two receiving holes (receiving portions) 32 for receiving the support portions 22 of the fixed blade 21 are provided on the lower rising edge of the U-shaped cross-sectional view. The size of the receiving hole 32 is such that there is a sufficient gap between the receiving hole 32 and the projection of the support portion 22. Locking members 34 for receiving and locking the cutting edge side of the fixed blade 21 are provided near both ends of the U-shaped cross section member. Then, two leaf springs 33 (biasing members) are provided on the bottom side of the U-shaped cross section.
Are formed integrally with the member 31 by punching.

The fixed blade 21 has a projection of the support portion 22 swingably inserted into a receiving hole 32 of the fixed blade holding member 31, and the back portion is pressed by a leaf spring 33 as shown in FIG. Locking members 34 are provided at both ends of the side to lock the swing,
It is held by the fixed blade holding member 31.

The movable blade 11 is made of a thin steel plate having an inverted V-shaped cutting blade 11a, and is driven to reciprocate in the direction of the arrow fixed blade by driving means (not shown) engaging with the driving hole 12.

In this way, the fixed blade 21 is urged by the leaf spring 33 so as to be pressed against the movable blade 11, and
Since the gap is provided between the movable blade 11 and the receiving hole 32, when the cutting operation proceeds and the movable blade 11 comes into contact with the fixed blade 21,
If the pressure contact forces of the V-shaped cutting edges on both sides in the blade width direction are different, the fixed blade moves and the pressure contact forces on both sides become equal. In other words, the cutting device of the present invention can make a good cut even if the installation accuracy of the movable blade and the fixed blade is somewhat poor, because the press contact force of the press contacts of both blade edges is corrected to be equal.

Further, since the biasing spring is formed integrally with the blade holding member, the reliability is higher and the size can be easily reduced as compared with a conventional method such as mounting a coil spring in a narrow place.

Third Embodiment FIG. 5 is a perspective view showing the structure of a movable blade and a biasing member according to a third embodiment of the present invention. In the case of the second embodiment, an urging means is provided on the fixed blade side.
Is different in that an urging means is provided on the movable blade side.

In the figure, the movable blade 11 made of a thin steel plate having an inverted V-shaped cutting blade 11a is provided with support portions 15 protruding from both sides in the width direction in the upper part of the figure.

The movable blade holding member (blade holding member) 41 is formed of a rectangular plate member, and has ears 42 bent at right angles on both sides of the width.
Receiving hole (receiving portion) 42 to be swingably received by holding 5
a is provided. The receiving hole 42a is sized to have a sufficient gap between the receiving hole 42a and the supporting portion 15. A locking member 4 for locking the swing of the movable blade 11 below the ears on both sides of the width.
5 are provided. Then, two leaf springs 43 (biasing members) are formed integrally with the member 41 by punching on the surface of the plate member.

The movable blade 11 has a supporting portion 15 swingably inserted into a receiving hole 42 of a movable blade holding member 41 and a back portion having a leaf spring 4.
3, and is urged by being pushed by the movable blade holding member 41.

The movable blade holding member 41 is driven to reciprocate in the direction of the arrow fixed blade by driving means (not shown) which is engaged with the driving hole 44.

As described above, the movable blade 11 is urged by the leaf spring 43 so as to press against the fixed blade 21, and a gap is provided between the support projection 15 and the receiving hole 42a.
When the movable blade 11 comes into contact with the fixed blade 21, the pressing forces of the V-shaped blades on both sides in the width direction are corrected to be equal to each other as in the second embodiment, and even if the installation accuracy of the movable blade and the fixed blade is somewhat poor, Good cutting is possible. Further, since the biasing spring is formed integrally with the blade holding member, the reliability is higher and the size can be easily reduced as compared with the case where the coil spring is mounted in a narrow place, as in the second embodiment. .

Fourth Embodiment FIG. 6 of the fourth embodiment shows a case where the urging means is provided on the fixed blade 21, and FIG.
FIG. In the second and third embodiments, the blade holding member is provided with a leaf spring (biasing means).
A leaf spring 23 may be stamped on the fixed blade 21 as shown in FIGS. 6 and 7, or a leaf spring 16 may be stamped and formed on the movable blade 11 as shown in FIG.

[Embodiment 5] Embodiment 5 relates to the shape of a blade. FIG. 8 shows the shape of the movable blade of the present invention, and FIG. 9 shows the shape of the fixed blade. This shape is previously formed into a V-shape with the V-shaped vertex 11b of the movable blade 11 as the vertex as shown in FIG. 8, or a V-shape with the substantially center 21b in the width direction of the fixed blade 21 as the vertex as shown in FIG. The convex direction of this letter is arranged so as to face the mating blade.

In this manner, the cutting blades always cut at an intersection angle (the angle formed by the cutting edges projected on the plane of the sheet to be cut) from the start to the end of the cutting, so that even if the cutting blades wear, the sharpness is sharp. And good cutting can be performed. In particular,
The sharpness is improved at the apex of the V-shaped blade of the movable blade.
This shape may be provided on either the movable blade or the fixed blade, or may be provided on both.

Embodiment 6 Embodiment 6 also relates to the shape of a blade. FIG. 10A is a front view of the movable blade and the fixed blade according to the sixth embodiment, FIG. 10B is a Y view thereof, and FIG.
FIG.

A tall button 47 is provided substantially at the center in the blade width direction.
The movable blade 11 is slidably in contact with a guide plate 46 constituting a bending means provided with a short button 48 near both widths. Since the elastic movable thin blade 11 is pressed in the direction of the guide plate 46 by means (not shown) on both sides in the width direction, the movable blade 11 is bent to the convex direction in the direction of the fixed blade 21, and the back surface is pressed by a button 47. , 4
8 and slide to cut the sheet material.

In this manner, if the blade is bent in a convex shape and pressed against it, the required crossing angle at the time of cutting can be obtained in the same manner as in the fifth embodiment, and the sharpness is maintained even when the blade is worn as described above. Good cutting.

Although the movable blade is bent in the sixth embodiment, the fixed blade may be bent in the same manner.
Both may be bent.

Although the first to sixth embodiments have been described individually, the inventions of these embodiments may be partially or entirely combined.

FIG. 2 is a sectional view of a sheet material cutting apparatus in which a movable blade is disposed on an opening / closing cover (cover frame). FIG. 2 is different from FIG. 1 in that the fixed blade 21 is provided on the base frame 1 and the movable blade 11 is provided on the cover frame 2. The content of the present invention described above can be applied to the sheet material cutting apparatus shown in FIG. 2. However, in FIG. 2, a movable blade having a heavy driving portion is provided on the cover frame. The sheet material cutting device shown in FIG.

[0052]

As described above, in the separation type slide type sheet material cutting apparatus of the present invention, since the movable blade and the fixed blade are disposed so as to be separable, the setting of the sheet material to be cut is easy. . Further, since a play gap is provided between the support portion for swingably supporting these blades and the receiving portion of the blade holding member, even when the mounting accuracy of the blades is not sufficient, the width direction is automatically set at the time of cutting. Are corrected so that the pressure contact force of each of them becomes uniform. As a result, even if the mounting accuracy of the blade is insufficient, a uniform and appropriate pressing force can be obtained in the width direction, and good cutting can be performed.

Further, in the separation type slide type sheet material cutting device of the present invention, the movable blade is separated to the discharge side of the sheet material, the fixed blade to the insertion side, and the fixed blade is opened to the discharge side of the sheet material. The cutting edge of the sheet material on the insertion side after cutting does not escape from the cutting edge, and smooth continuous cutting can be performed. Also, when the fixed blade is opened to the discharge side, the guide end of the movable blade is curved so as not to interfere, so that the cover can be easily opened and closed, and the movable blade and the fixed blade smoothly cross-press against each other. , Can be cut smoothly.

Further, since the biasing member for pressing the movable blade and the fixed blade is integrally formed with the movable blade, the fixed blade or the blade holding member, the size of the apparatus is reduced, and the proper position for biasing is determined. An appropriate pressure can be easily selected.

Further, the blades are preformed in an elliptical shape, or are bent so as to be convex with respect to the counterpart blade by a bending means and pressed against each other, so that both blades are always at an intersection angle (on the plane of the sheet material to be cut). Since the cutting is performed with the angle formed by the projected two cutting edges, even if the blade is worn, the sharpness is maintained and a good cutting can be performed. In particular, sharpness is improved at the top of the V-shaped blade of the movable blade.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration in which a fixed blade is provided on a cover frame of a separation-type slide sheet material cutting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration in which a movable blade is provided on a cover frame of the separation-type slide sheet material cutting device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a structure of a fixed blade and a biasing member of the cutting device according to the second embodiment of the present invention.

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a perspective view showing a structure of a movable blade and a biasing member of a cutting device according to a third embodiment of the present invention.

FIG. 6 is a view in which a biasing member is provided on a fixed blade of a cutting device according to a fourth embodiment of the present invention.

FIG. 7 is a diagram in which a biasing member is provided on a movable blade of a cutting device according to a fourth embodiment of the present invention.

FIG. 8 is a view showing a shape of a movable blade according to a fifth embodiment of the present invention.

FIG. 9 is a view showing a shape of a fixed blade according to a fifth embodiment of the present invention.

FIG. 10 is a diagram illustrating a bending member of a cutting device according to a sixth embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 base frame, 2 cover frame, 2a hinge, 3 recording paper storage section, 4 rubber roller, 5 print head, 6 paper passage port, 11 movable blade, 12 drive hole, 13
Guide portions, 14, 15 Supporting projections, 16 leaf springs (biasing members), 21 fixed blades, 22 support portions, 23 leaf springs (biasing members), 31 fixed blade holding members, 32 receiving holes (receiving portions), 33 Leaf spring (biasing member), 34 locking member, 35 ear, 41 movable blade holding member, 42 ear,
43 leaf spring (biasing member), 45 locking member, 46 guide plate, 47, 48 button (flexible member), S roll paper (sheet material)

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[Procedure amendment]

[Submission date] June 14, 2000 (2006.1.
4)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 10

Claims (6)

[Claims] In a sliding sheet material cutting apparatus for cutting a sheet material by cross-sliding a movable blade having a cutting edge line depressed in an inverted V-shape with a fixed blade, the movable blade and the fixed blade can be separated. And at least one of the movable blade and the fixed blade is provided with two or more support portions, and the two blade edges are urged by an urging member so as to be in pressure contact with each other so that the support portion receives the blade holding member. A swingable support between the supporting portion and the receiving portion, and a play gap is provided between the supporting portion and the receiving portion, so that the pressing force in the blade width direction of the two cutting edges is corrected to be uniform. Separate type slide type sheet material cutting device. 2. The apparatus according to claim 1, wherein the movable blade is positioned on a discharge side of the sheet material to be cut, the fixed blade is positioned on an insertion side, and the fixed blade is opened on a discharge side of the sheet material with a side opposite to the blade edge as a center of rotation. 2. The separation type slide type sheet material cutting device according to claim 1, wherein the separation type slide type sheet material cutting device is arranged so as to be separable. 3. The movable blade is provided with a guide portion projecting from both ends of the width of the cutting blade to guide engagement of the fixed blade with the cutting edge, and the leading end of the guide portion discharges the sheet material to be cut by the fixed blade. The separation type slide type sheet material cutting device according to claim 2, wherein the separation type slide type sheet material cutting device is curved so as not to interfere when separating by opening to the side. 4. The movable blade or the fixed blade or the blade holding member is made of an elastic plate material, and the urging member is formed integrally with the movable blade or the fixed blade or the blade holding member. Claims 1 to 3 characterized by the above-mentioned.
The separation type slide type sheet material cutting device according to any one of the above. 5. One or both of the movable blade and the fixed blade are preliminarily formed in a V-shape with the vertex of the V-shaped tip of the movable blade or substantially the center in the width direction of the fixed blade being the vertex. The separation type slide type sheet material cutting device according to any one of claims 1 to 4, wherein the convex shape of the serpentine shape is disposed so as to face a counterpart blade. 6. The apparatus according to claim 1, wherein one or both of the movable blade and the fixed blade are made of a plate having elasticity, and a bending means is provided for bending the plate so as to be convex with respect to the counterpart blade. Item 5. The separation type slide type sheet material cutting device according to any one of Items 1 to 4.