JP2002105885A - Soft-matching doctor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a doctor for preventing a cover from damaging by making the doctor softly contact to a roll uniformly in the width direction. SOLUTION: The teflon tube 20 in a blade-holding unit 10 for holding a doctor blade 16 has elasticity and pushes the doctor blade 16 to the surface 76 of a roll. The pressure tube 24 and the open tube 26 of a supporting unit 22 for supporting the blade-holding unit 10 push the doctor blade 16 to the surface 76 of the roll by pressurizing the blade-holding unit 10 and, at the beginning of doctoring, move the doctor blade 16 toward the surface 76 of the roll to contact to the surface 76. An air cylinder 68 moves the blade-holding unit 22 to the direction toward the surface 76 of the roll. The pressure tube 24 and the open tube 26 are arranged in the width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doctor for scraping paper dust or the like adhering to a roll surface or a cylinder surface of a paper machine or the like,
The present invention relates to a doctor for adjusting the film thickness of an object applied on a roll surface, and more particularly to a softmatic doctor capable of softly contacting a roll surface or the like.

[0002]

2. Description of the Related Art A doctor is used to scrape off paper powder or the like adhering to the surface of a calendar roll of a paper machine or to make the film thickness of a photosensitive agent applied to the surface of a transfer roll constant.

Conventionally, there has been a doctor as shown in FIG. FIG.5 (A) is what is called a DST-type doctor, in which the doctor blade 102 is attached to the tip of a finger 129 which is rotatably attached around a rotation axis 128,
It is held by the finger 129 and the blade holder 121. By injecting or evacuating air into the open air tube 127 and the pressurized air tube 130, the finger 129 is rotated around the rotation shaft 128, and the doctor blade 102 is rotated.
Is pressed against a surface of a roll or the like, or is separated from the surface.

FIG. 5 (B) shows a so-called conformal doctor, in which a doctor blade 102 is held between a holding piece 132 and a blade holder 111, and a liquid-filled tube 131 is connected to the doctor blade. Blade 102 and holding piece
132 to increase the holding power and stabilize the holding.

[0005]

When the DST type or conformal type doctor according to the prior art as described above is used, for example, for a soft roll of a soft calendar, there are the following problems.

[0006] The soft calendar includes a hard (metal) roll and a soft roll. The paper is passed between nips formed by these rolls to smooth the surface of the paper and to give the paper a gloss. The surface of the soft roll is covered with an elastic cover made of a polymer material.

When a doctor according to the above-mentioned prior art is used for a roll, in the case of the DST type, a pressing force (linear pressure) for pressing the doctor blade against the roll surface is required in order to bring the doctor blade into uniform contact with the roll surface. It was necessary to make it excessive. This is because there is a gap (play) between the distal end portion 142 of the finger 129 holding the doctor blade and the blade holder 121 and the doctor blade 102, as shown in FIG. Since the pressing force is excessive, there is a problem that the roll surface is partially damaged (uneven wear). This problem is particularly remarkable in a soft roll around which an elastic cover is wound, and there is a high possibility that the cover surface will be damaged when a doctor is used.

On the other hand, in the case of the conformational type, when the use of a doctor is started, when the doctor blade placed at a position (standby position) away from the surface of the roll is brought into contact with the surface of the roll, the tip of the doctor blade is used. Contacts the roll in a state of being lower (inclined) than the position of the tip during doctoring.

FIG. 5B shows a state during doctor ring after the doctor blade comes into contact with the roll. At this time, the tip of the doctor blade is raised. Dotted line 74 in the figure
Is blade 1 immediately after blade 102 contacts roll 12.
Indicates 02. Since the tip of the blade 102 is lowered, the angle of the blade 102 with respect to the roll 12 is large,
Easy to hurt.

The reason why the tip of the doctor blade 102 is lower than the position at the time of doctoring is as shown in FIG.
When there is no doctoring between the doctor blade 102 and the tip 142 of the holding piece 132, there is a gap, and when the tip of the doctor blade 102 is not in contact with the roll 12 (when not doctoring), the doctor blade 102 This is because it is supported by the tip 142 of the holding piece 132.

When the tip of the doctor blade is lowered (when not doctoring), the doctor blade comes into contact with the surface of the roll at a deeper angle than during operation.
Therefore, if the doctor blade attempts to contact the surface of the roll while the roll is rotating, there is a high risk that the tip of the blade will bite into the resin cover on the roll surface and damage the cover. Therefore, it is usually necessary to bring the tip of the blade into contact with the soft roll while the rotation of the roll is stopped. During the rotation of the roll, the doctor blade had to be kept in continuous contact with the roll.

When the doctor is continuously brought into contact with the soft roll, the contact time between the doctor and the soft roll becomes longer, so that the abrasion of the elastic cover increases. Therefore, it is desirable that the doctor is intermittently brought into contact with the soft roll. However, in the case of a conformal doctor, the intermittent operation of the doctor is difficult for the above-mentioned reasons.

The present invention solves these drawbacks of the prior art and prevents the wear of the cover by uniformly and softly contacting the doctor blade with the roll in the width direction. An object of the present invention is to provide a doctor capable of preventing wear.

In recent years, as the DIP (recycled paper content) of newsprint has increased, the content of dust has increased, and the need for doctoring of soft rolls has increased. Performing a ring is strongly required. Since the doctor according to the present invention can perform soft roll doctoring without shortening the life of the resin cover, such a problem can be sufficiently solved.

[0015]

According to the present invention, there is provided a softmatic doctor, comprising: a blade holder for holding a doctor blade; and a blade for moving the blade holder toward the surface of the roll. Supporting the holding unit, including a blade support unit that presses the doctor blade against the surface, and a support unit moving unit that can move the blade support unit toward the surface of the roll, the blade holding unit has elasticity Including a pressurizing unit, the pressurizing unit presses the doctor blade against the surface of the roll, and the blade support unit can move the blade holding unit and pressurize the blade holding unit in a tube-type drive. The tube type driving unit is arranged in the width direction of the doctor blade, By moving the blade holder toward the surface of the roll, the doctor drive can move the doctor blade toward the surface of the roll and make contact with the surface. , The doctor blade can be pressed against the roll surface.

According to the present invention, as a result of having such a configuration, the blade holding portion includes an elastic pressing portion, so that the blade edge of the doctor blade has elasticity and can be soft-touched. In addition, since the tube-type driving unit disposed in the width direction of the blade presses the doctor blade against the roll surface, a uniform linear pressure can be obtained in the width direction.

Further, at the start of doctoring, the blade supporting portion is moved in the direction toward the surface of the roll by the supporting portion moving means, and then the driving portion moves the blade holding portion toward the surface of the roll, whereby the doctor is moved. Since the blade can be moved toward and brought into contact with the surface of the roll, the doctor blade can intermittently contact the surface of the roll during rotation of the roll.

That is, intermittent operation of the doctor becomes possible, and damage to the resin cover coated on the surface of the soft roll is reduced as compared with the conventional technology, and the life of the resin cover is extended as compared with the conventional technology.

Also, in the present invention, the doctor blade includes a falling-off preventing portion for preventing the doctor blade from dropping forward from the blade holding portion, and the blade holding portion is engaged with the falling-off preventing portion to engage the doctor. Including a locking portion for preventing the blade from dropping forward from the blade holding portion, the falling-off preventing portion and the locking portion include a convex portion and a concave portion respectively arranged in the width direction of the blade, and the convex portion of the falling-off preventing portion is included. May be able to pass through the concave portion of the locking portion, and the convex portion of the locking portion may be able to pass through the concave portion of the fall prevention portion. Thereby, when replacing the worn doctor blade, the doctor blade can be detached from the blade holding portion forward.

In the present invention, the blade supporting portion includes a base portion for supporting the blade holding portion, and a doctor back to which the base portion is attached. The softmatic doctor further has a relative position between the base portion and the doctor back. Position adjusting means for adjusting the position can be included. As a result, the position of the doctor blade can be adjusted, for example, in the horizontal direction (toward the blade edge) to adjust the contact of the doctor blade with the roll.

According to the present invention, in order to solve the above-mentioned problems, in a doctor method using a doctor blade pressed against the surface of a roll, the elasticity of the blade holding portion is reduced while the doctor blade is held by the blade holding portion. With the pressurizing unit having, the doctor blade is pressed against the surface of the roll, and by the support unit moving means, at the start of the doctor ring, the blade support unit supporting the blade holding unit is moved in the direction toward the surface of the roll. By the tube-type driving unit of the blade supporting unit arranged in the width direction of the doctor blade, the blade holding unit is moved toward the surface of the roll, whereby the doctor blade is moved toward the surface and brought into contact with the surface, The blade holder is pressurized by the tube drive unit, and the doctor blade is applied to the roll surface. It may be pressed in the state. Also in this case, the above-mentioned problem can be solved.

Further, in the method of the present invention, in order to start doctoring during rotation of the roll, the blade holding unit is moved toward the surface of the roll by a tube type driving unit, and the doctor blade is moved to the surface of the roll. Intermittent operation of the doctor may be performed by contacting and further pressing against the surface of the roll.

The doctor blade is provided with a stopper for preventing the doctor blade from dropping forward from the blade holder. The blade holder is engaged with the stopper to hold the blade. A locking portion is provided to prevent the falling off of the blade from the front, and a convex portion and a concave portion are respectively provided in the width direction of the blade in the falling prevention portion and the locking portion, and the locking portion is formed in the convex portion of the falling prevention portion. Through the recess of
The protrusion of the locking portion may pass through the recess of the drop-prevention portion. Thereby, when replacing the worn doctor blade, the doctor blade can be detached from the blade holding portion forward.

Further, it is preferable to provide a base portion for supporting the blade holding portion and a doctor back to which the base portion is attached on the blade support portion, and to adjust a relative position between the base portion and the doctor back.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a soft doctor according to the present invention.
The softmatic doctor according to the present invention is particularly suitable for a soft roll of a soft calendar or a soft roll of a super calendar, for example. FIG. 1 shows a state in which doctoring of the surface 76 of the soft roll 12 is performed using one embodiment of the softmatic doctor according to the present invention. The surface 76 of the soft roll 12 is covered with the resin cover 14. The arrow 78 in the figure indicates the rotation direction of the roll 12.

In order to remove paper dust and the like on the roll surface 76,
The doctor blade 16 is pressed against the surface 76 of the roll. FIG. 2 shows an enlarged view of the doctor tip 18 including the doctor blade 16. The doctor tip 18 has a blade holder 10 for holding the doctor blade 16, and the blade holder 10 has a roll surface 76.
The blade support 22 supports the doctor blade 16 against the surface 76 while supporting the doctor blade 16 to move toward the surface.

The blade holding unit 10 includes a Teflon (registered trademark) tube 20 for pressing the doctor blade 16 against the surface of the roll, and the Teflon tube 20 is a pressing unit having elasticity. On the other hand, the blade support 22 is
10 can be pressurized and the blade holder
It includes a pressure tube 24 and an open tube 26 which are tube-type driving units capable of moving the 10. Pressurizing tube 24
The opening tube 26 is arranged in the width direction of the doctor blade 16. The pressure tube 24 presses the blade holding unit 10 so that the doctor blade 16 can be pressed against the roll surface 76, and the drive unit pushes the blade holding unit 10 toward the roll surface 76 at the start of doctoring. By moving the doctor blade 16, the doctor blade 16
To make contact with the surface 76.

The blade support 22 further includes a base plate 28 as a base for supporting the blade holder 10, and a doctor back 30 to which the base plate 28 is attached. This doctor also has a base plate 28 and doctor back
And a position adjustment unit 32 that is a position adjustment unit that adjusts a relative position between the position adjustment unit 30 and the horizontal direction.

Next, these will be described in detail. The doctor blade 16 is sandwiched between the upper plate 34 and the lower plate 36 of the blade holder 10. The tip 38 of the lower plate 36 is curved. On the other hand, the doctor blade 16 is provided with a projection 40 which is a falling-off preventing portion for preventing the doctor blade 16 from dropping forward (toward the blade edge) from the blade holding portion 10. The distal end portion 38 functions as a locking portion that locks with the projection portion 40 and prevents the doctor blade 16 from dropping forward from the blade holding portion 10.

A spacer 44 is provided to prevent the doctor blade 16 from moving backward. The spacer 44 is provided between the upper plate 34 and the lower plate 36, and is also used for attaching the lower plate 36 to the upper plate 34.

The protruding portion 40 and the tip portion 38 are respectively provided in the width direction of the doctor blade 16 so that the blade 16 can be detached and replaced from the blade edge direction when the doctor blade 16 is worn. The convex portions and the concave portions are provided alternately, for example, in a comb-teeth shape as shown in FIG. FIG.
3 is a view of the blade 16, the protrusion 40, and the tip 38 of the lower plate 36 in the direction of arrow A in FIG. The protrusion 40 is a protrusion
82 and the concave portion 86 are alternately provided, and the tip portion 38 also has the convex portion 84 and the concave portion 88 alternately.

When replacing the blade 16, the blade 16 is moved in the width direction of the blade 16, and the positions of the protrusion 82 of the protrusion 40 and the recess 88 of the tip 38, and the recess 86 of the protrusion 40 and the tip 38 are reduced. After matching the positions of the convex portions 84 of the
Then, the worn blade 16 is pulled out by passing the concave portion 88 of the distal end portion 38 and the concave portion 86 of the projection portion 40 through the convex portion 84 of the distal end portion 38. Thereafter, a new blade 16 is inserted from the front. After the insertion, the projection 82 of the projection 40 and the projection 84 of the tip 38 are inserted.
And prevents the blade 16 from dropping forward.

The shapes of the projection 40 and the tip 38 are not limited to the shapes shown in FIG. 4, and for example, a convex or concave shape such as a triangle or a circle may have at least one shape in the width direction of the blade 16. More than one piece may be in a continuous shape.

The replacement of the blade 16 is performed in the forward direction.
In addition to exchanging the blade by attaching and detaching the blade 16, it is also possible to exchange the blade by attaching and detaching the blade in the width direction of the blade 16. Because the blade in Figure 2
As is clear from the cross-sectional views of the blade 16 and the blade holding portion 10, the blade 16 has a structure having no obstacles in the width direction of the blade 16 so that the blade 16 can be attached and detached in the width direction of the blade 16. Because. In order to prevent the blade 16 from moving in the width direction of the blade 16 during doctoring, both ends of the blade 16 in the width direction are
It is fixed to the blade holding unit 10 by a clamp member (not shown). Note that the distal end portion 38 is provided with a receiving portion 90 for preventing the protruding portion 40 falling during non-doctoring from damaging the Teflon tube 20.

The blade holding unit 10 includes a Teflon tube 20 which is a pressing unit for pressing the doctor blade 16 against the surface of the roll. The Teflon tube 20 is filled with, for example, oil, and has elasticity. The Teflon tube 20 applies an upward force F1 shown in the drawing to the doctor blade 16 at the point of contact with the blade 16 during doctoring. On the other hand, an upward force F2 acts on the tip of the blade 16 from the surface of the roll, and the force F1 and the force F2 balance with the tip 42 of the upper plate 34 as a fulcrum. Since the force is applied to the blade 16 by the Teflon tube 20, the cutting edge of the blade 16 has elasticity, and soft touch is possible.

By the way, when the blade 16 is not in contact with the roll 12, no force F2 acts, so that the tip of the blade 16 is lowered. FIG. 3 shows the state at this time.
Shown in FIG. 3 shows a state where the blade 16 is not in contact with the soft roll, that is, when doctoring is not performed.

The blade holder 10 has an upper plate 34
Is attached to the upper plate 46 of the blade support 22 with screws 70, thereby attaching the blade support 22 to the blade support 22. FIG.
The screw 72 is for adjusting the position of the tip of the upper plate 34 in the vertical direction. When performing the adjustment, the screw 72 is screwed into the upper plate 34 with the screw 70 slightly loosened. Screw the screw 72 deep into the upper plate 34, and
The position of the tip of the upper plate 34 decreases as the gap between the upper plate 34 of the support 10 and the upper plate 46 of the support portion 22 increases. After the adjustment, tighten the screw 70.

The upper plate 46 of the blade support 22 is attached to the base plate 28 so as to be rotatable around a rotation axis 48. The pressure tube 24 and the open tube 26 are provided between the upper plate 46 and the base plate 28. The pressure tube 24 and the release tube 26 are arranged in the width direction of the blade 16.

A hose (not shown) is connected to an end in the width direction of each of the tubes 24 and 26 from a compressed air supply source (not shown) via a switching valve (not shown). The switching valve is a control valve that switches between a path for sending the compressed air from the compressed air supply source to the tubes 24 and 26 and a path for releasing the compressed air from the tubes 24 and 26 to the atmosphere. The switching valve sends compressed air from the compressed air supply source to the tubes 24 and 26 to increase the pressure of the tubes 24 and 26, and releases the air from the tubes 24 and 26 to the atmosphere to reduce the pressure of the tubes 24 and 26. Can be.

This switching valve pressurizes the pressurizing tube 24 and depressurizes the open tube 26, or the pressurizing tube 24
And the open tube 26 is pressurized to rotate the upper plate 46 about the rotation axis 48 in any rotational direction. When the blade 16 is brought into contact with the roll 12 (during doctoring), the pressurizing tube 24 is pressurized and the open tube 26 is depressurized as shown in FIG. Conversely, when the blade 16 is separated from the roll 12 (when doctoring is stopped), FIG.
The pressure in the pressurizing tube 24 is reduced and the open tube 26 is pressurized as shown in FIG.

As described above, since the blade 16 is pressed against the roll 12 by using the pressure tube 24 and the release tube 26 provided in the width direction of the blade 16, a uniform linear pressure in the width direction (the blade 16 Pressing 76) is obtained.
In addition, the linear pressure can be easily controlled by controlling the air pressure in the tubes 24 and 26 by the switching valve.

In the present invention, the blade support 22
And the blade holding unit 10 described above are combined as described above to constitute the doctor tip 18, so that the blade supporting unit 22 has a feature that uniform linear pressure is possible, and the blade holding unit 10 Due to the feature that soft touch is possible, doctoring can be performed with a uniform and low contact pressure as compared with the conventional technique shown in FIG. 5 (A). Therefore, the resin cover 14 of the soft roll 12 is not locally worn or damaged.
It has the advantage that it does not hurt 12.

The base plate 28 is attached to the doctor back 30. A position adjustment unit 32 for adjusting the relative position between the base plate 28 and the doctor back 30 in the horizontal direction is attached to the rear end of the base plate 28,
Position 28 horizontally. The position adjustment by the position adjustment unit 32 is performed by slightly loosening the screw 80 fixing the base plate 28 to the doctor back 30 and then moving the screw 56 passing through the plate 50 attached to the doctor back 30 back and forth. Adjust the position of. The screws 56 are fixed to the base plate 28. Further, a hole at a portion where the screw 80 passes through the base plate 28 is an elongated hole so that the base plate 28 can be moved in the horizontal direction. After determining the position, screw 56 is attached to plate 50 with bolts 52 and 54.
And the horizontal position of the base plate 28 is fixed.

In the present embodiment, the position adjusting section adjusts the blade 16 in the horizontal direction. However, the present invention is not limited to this, and the position of the blade 16 may be adjusted in a vertical direction, an oblique direction, or the like. It may be adjusted.

Returning to FIG. 1, the doctor back 30 is a frame.
Attached to 58. The shaft 60 of the frame 58 is rotatable around bearings 62 provided at both ends in the width direction of the blade 16, and the bearings 62 are frame supporting portions 64 installed on the floor.
Attached to. The shaft 60 is connected to an air cylinder 68 via a rotation shaft 66 at both ends in the width direction of the blade 16. The frame 58,
And blade support attached to frame 58
22 and blade 16 can be rotated about axis 60.

When doctoring is started while the roll 12 is rotating, the blade support 22 is moved (rotated) by the air cylinder 68 in a direction toward the surface of the roll 12, and rotated before the blade 16 comes into contact with the roll 12. To stop. FIG. 3 shows the state of the softmatic doctor when the rotation stops. Then, the pressure tube 24 of the blade support 22
And the pressure of the open tube 26 is reduced, and the blade support 22 is
Is rotated about a rotation axis 48 to bring the blade 16 into contact with the roll 12.

As a result of bringing the blade 16 into contact with the roll 12 in two steps, the angle between the blade 16 and the roll surface 76 when the blade 16 starts to contact the roll 12 is as shown in FIG. The blade 16 does not bite into the roll surface 76 even when the roll 12 is rotating. As a result, the roll 12
The intermittent operation of the doctor in a state where is rotated can be performed.

By combining the blade holding unit 10 and the blade supporting unit 22 as in the present invention, intermittent operation of the doctor becomes possible, and the wear of the resin cover 14 of the soft roll 12 is reduced. The service life of the cover 14 is increased compared to a doctor according to the prior art.

When doctoring is stopped while the roll 12 is rotating, the pressure tube 24 of the blade support 22 is depressurized and the open tube 26 is pressurized, and the blade support 22 is
The blade 16 is rotated about 48 to separate the blade 16 from the roll 12 by a predetermined distance. FIG. 3 shows the state at this time. afterwards,
The blade support 22 is moved in a direction away from the surface of the roll 12 by the air cylinder 68.

As described above, according to this embodiment, the softmatic doctor having the advantages of the DST type doctor shown in FIG. 5A and the advantages of the conformal type doctor shown in FIG. That is, it is possible to provide a doctor having a uniform linear pressure in the width direction of the blade and capable of performing soft touch. Further, since the softmatic doctor of this embodiment has a structure capable of intermittent operation, intermittent operation of the doctor is possible, and damage to the soft cover of the soft roll is less than that of the conventional doctor. As a result, the life of the soft cover (resin cover) is prolonged.

Further, in the softmatic doctor according to the present embodiment, the blade 16 can be replaced from either the front direction or the width direction. It has the advantage that.

Next, the operation of the softmatic doctor according to the present invention will be described. After the rotation of the soft roll 12 starts, when doctoring becomes necessary,
Is depressurized and the open tube 26 is pressurized so that the blade support 10 and the blade 16 are raised as shown in FIG.

In this state, the doctor frame 58 is rotated around the rotation shaft 60 by the air cylinder 68 to rotate the doctor blade 16 toward the soft roll 12. When the doctor frame 58 rotates to the position just before the roll 12 shown in FIG.
Stop the rotation of.

Next, the pressure tube 24 is pressurized and the open tube 26 is depressurized to bring the doctor blade 16 into contact with the surface 76 of the roll 12 at a low linear pressure. Thereafter, the pressures of the pressurizing tube 24 and the open tube 26 are adjusted so that a predetermined linear pressure is obtained. The predetermined linear pressure is, for example, 0 to 100 N / m, and preferably 50 N / m.

When the doctoring is stopped, the pressure tube 24 is first depressurized and the open tube 26 is pressurized to separate the doctor blade 16 from the surface 76 of the roll 12. Thereafter, the air cylinder 68 is operated to rotate the doctor frame 58 to further separate the doctor blade 16 from the surface of the roll.

[0056]

As described above, according to the present invention, a softmatic having the advantages of the DST type doctor shown in FIG. 5A and the advantages of the conformal type doctor shown in FIG. A doctor, that is, a doctor having a uniform linear pressure in the width direction of the blade and capable of performing soft touch can be provided. Further, since the softmatic doctor of the present invention has a structure capable of intermittent operation, the intermittent operation of the doctor becomes possible, and the soft cover of the soft roll is less damaged than the conventional doctor. As a result, the life of the soft cover (resin cover) is prolonged.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of a softmatic doctor according to the present invention.

FIG. 2 is an enlarged view showing a distal end portion of the softmatic doctor shown in FIG.

FIG. 3 is a view showing a state before a doctor blade of the softmatic doctor shown in FIG. 1 comes into contact with a soft roll.

FIG. 4 is a view showing a structure of a protrusion of a doctor blade and a tip of a lower plate of the softmatic doctor shown in FIG. 1;

FIG. 5 is a view showing a doctor according to the related art.

[Explanation of symbols]

 10 Blade holding part 12 Soft roll 14 Resin cover 16 Doctor blade 20 Teflon tube 22 Blade support part 24 Pressure tube 26 Open tube 28 Base plate 30 Doctor back 32 Position adjustment part 38 Tip part 40 Projection part 58 Doctor frame 68 Air cylinder 76 Surface

Claims (8)

[Claims] 1. A softmatic doctor including a doctor blade pressed against the surface of a roll, the doctor comprising: a blade holder for holding the doctor blade; and the blade holder moving toward the surface of the roll. A blade support unit for supporting the blade holding unit so as to press the doctor blade against the surface, and a support unit moving unit capable of moving the blade support unit in a direction toward the surface of the roll. The blade holding unit includes a pressing unit having elasticity, the pressing unit presses the doctor blade against the surface of the roll, and the blade supporting unit can move the blade holding unit. And a tube-type driving unit capable of pressurizing the blade holding unit. The doctor blade is arranged in the width direction of the doctor blade, and at the start of doctoring, the tube-type driving unit moves the blade holding unit toward the surface of the roll, thereby moving the doctor blade toward the surface of the roll. The doctor blade can be pressed against the roll surface by moving the tube type driving unit to contact the surface, and pressing the blade holding unit by the tube type driving unit. Softmatic doctor. 2. The softmatic doctor according to claim 1, wherein the blade holder is moved toward the surface of the roll by the drive unit to start doctor ring during rotation of the roll. A softmatic doctor, wherein the doctor blade comes into contact with the surface of the roll, and the drive unit presses the doctor blade against the surface of the roll. 3. The softmatic doctor according to claim 1, wherein the doctor blade includes a falling-off preventing portion for preventing the doctor blade from dropping forward from the blade holding portion. The holding portion includes a locking portion that locks with the drop prevention portion to prevent the doctor blade from dropping forward from the blade holding portion. The drop prevention portion and the locking portion each include a locking portion of the blade. Including a convex portion and a concave portion arranged in the width direction, the convex portion of the stopper portion can pass through the concave portion of the locking portion, and the convex portion of the locking portion can pass through the concave portion of the drop preventing portion. A softmatic doctor. 4. The softmatic doctor according to claim 1, wherein the blade support includes a base supporting the blade holder, and a doctor back to which the base is attached. The softmatic doctor further comprises a position adjusting means for adjusting a relative position between the base portion and the doctor back. 5. A doctor method using a doctor blade pressed against the surface of a roll, the method comprising: holding a doctor blade by a blade holding unit; By
The doctor blade is pressed against the surface of the roll, and at the start of doctoring, a blade supporting portion that supports the blade holding portion is moved in a direction toward the surface of the roll by a supporting portion moving means. The blade holding unit is moved toward the surface of the roll by the tube-type driving unit of the blade supporting unit arranged in the width direction of the doctor blade, whereby the doctor blade is moved toward the surface to thereby move the doctor blade. A doctor method, wherein the doctor blade is pressed against the surface of the roll by pressing the doctor blade against the surface of the roll by pressing the blade holding unit with the tube-type driving unit. 6. The doctor method according to claim 5, wherein
To start doctoring during the rotation of the roll,
The doctor method, wherein the blade holding unit is moved toward the surface of the roll by the tube-type driving unit so that the doctor blade is brought into contact with the surface of the roll and further pressed against the surface of the roll. 7. The doctor method according to claim 5, wherein the doctor blade is provided with a falling-off preventing portion for preventing the doctor blade from falling forward from the blade holding portion. A locking portion for locking the doctor blade from dropping forward from the blade holding portion with the locking portion, the locking portion and the locking portion are provided with a width of the blade, respectively. A convex portion and a concave portion arranged in the direction are provided, the convex portion of the falling-off preventing portion passes through the concave portion of the locking portion, and the convex portion of the locking portion passes through the concave portion of the falling-off preventing portion. And doctor method. 8. The doctor method according to claim 5, wherein the blade support includes a base supporting the blade holder and a doctor back to which the base is attached. A doctor method, wherein a relative position between a base portion and the doctor back is adjusted.