JP4412768B2 - Strip scraper device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, for example, a canvas used in a dryer part of a paper machine, for example, a paper powder adhering to the surface of an endless belt that circulates in a loop path and continuously adheres during operation. The present invention relates to a scraper device for strips to be removed.
[0002]
[Prior art]
FIG. 7 shows a general configuration of the dryer part 40 of the paper machine.
[0003]
In FIG. 7, the dryer part 40 is composed of a group of dryers 41 that are divided into upper and lower two stages and are arranged in the paper traveling direction. Depending on the operating speed of the paper machine and the type of paper produced, The number of dryers 41 is determined. In recent high-speed paper machines, it consists of several groups of dryer parts.
[0004]
The dryer 41 is composed of a cylindrical member having a length corresponding to the paper width to be produced, and the inside thereof is heated by pressurized steam or the like, so that the surface of the dryer 41 is kept uniform and at an appropriate high temperature.
[0005]
Each of the upper and lower dryers 41 has an endless belt-like canvas 43 that maintains a constant tension via a number of guide rolls 42a and 42b that are appropriately arranged for each group. Cycles at the same speed as the speed.
[0006]
On the other hand, as shown by the broken line in the figure, the continuously running paper 44 is mechanically dehydrated by the press part after the paper layer is continuously formed in the preceding process (not shown) and introduced into the dryer part 40 shown in the figure. Is done.
[0007]
The paper 44 introduced into the dryer part 40 comes into contact with the surface of each dryer 41, the upper part thereof is covered with a canvas 43, receives a pressing force, and sequentially passes through each dryer 41 at the same speed as the rotational peripheral speed of the dryer 41. And dried while running.
[0008]
The paper 44 sufficiently dried by the dryer part 40 smoothes and polishes the surface of the paper 44 in the calendar 45, is wound up as a roll paper 50 by the winder 46, and is carried out for the next process.
[0009]
During the series of steps, in the illustrated dryer part 40, the canvas 43 travels while keeping contact with the paper 44 in the drying process while maintaining a strong pressing force, so that it is mixed in the papermaking raw material peeled from the surface of the paper 44. It is inevitable that paper dust or the like (hereinafter collectively referred to as deposits) generated from the surface of the paper 44 in the drying process is unavoidably adhered to the pitch 43, and the canvas 43 circulates. The amount will increase over time and will deposit on the surface of the canvas 43.
[0010]
[Problems to be solved by the invention]
As described above, the deposits deposited on the canvas 43 in the dryer part 40 sometimes adhere to the paper 44 in the course of drying, thereby deteriorating the quality of the paper 44 and causing a great deal of adverse effects such as causing a piece of paper. Become.
[0011]
Therefore, in order to use the canvas 43 continuously, it is necessary to take measures to periodically remove or prevent the deposits from adhering to the surface contacting the paper 44 during operation. As one of the methods for preventing adhesion of deposits, for example, a liquid release agent such as silicon base is sprayed on the surface of the canvas 43 during operation, and the surface of the paper 44 in the drying process is sprayed onto the surface of the canvas 43. There are those that make the transfer and adhesion of the deposits difficult in terms of surface chemistry.
[0012]
However, in this method, the release agent such as the silicon base has a high chemical cost, and the strong adhesion force of the deposit is often superior, and the effect is insufficient.
[0013]
As another method, for example, at the position P in FIG. 7, a girder 47 is provided at right angles to the traveling direction of the canvas 43 as shown in FIG. 8 and FIG. A rope 48 is attached, and a wire net scraper 49 is connected to the rope 48 so that the free end of the rope 48 flutters along the traveling direction of the canvas 43.
[0014]
Here, the wire mesh scraper 49 is made of metal and has a flexible wire mesh shape, and is attached to the surface of the canvas 43 by bringing the metal mesh scraper 49 into contact with the surface of the traveling canvas 43 and applying a pressing force by its own weight. Is scraped off and captured by the mesh of the wire mesh scraper 49.
[0015]
However, in this type, when a substantially predetermined amount of deposits is caught in the mesh of the wire mesh scraper 49, it is necessary to stop the operation of the paper machine, remove the wire mesh scraper 49, clean it, and then reattach it. This takes a lot of time and labor, and the attached metal net scraper 49 is strongly adhered and deposited, and it takes a lot of labor to clean it. This will cause a reduction in the operating rate of the paper machine.
[0016]
Further, when this wire mesh scraper 49 is incorporated in a mechanical arrangement as shown in FIG. 7, there is a drawback that it cannot be installed because it is an upward arrangement with respect to the canvas 43 corresponding to the lower dryer 41 group. .
[0017]
The present invention eliminates the problems in the conventional example as described above, and automatically and reliably and effectively deposits adhering to an endless belt that circulates and travels like a canvas. It is an object of the present invention to provide a scraper device for strips that is to be removed.
[0018]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems, and as a first means, removes deposits adhering to the surface of a belt-like body that circulates like a canvas used in a dryer part of a paper machine. In the strip scraper device, a rail is disposed extending in a direction perpendicular to the traveling direction of the strip, and a traveling unit that is guided by the rail and reciprocates across the entire width of the strip, and A scraper device is provided that includes a blade that is in contact with and engages with the surface of the belt-shaped body, and the blade provides a belt-shaped scraper device in which a contact surface with the canvas is formed by a curved surface that bends in the traveling direction of the traveling unit. is there.
[0019]
That is, according to the first means of the present invention, a scraper device comprising a running part provided with a blade that contacts and engages the surface of the belt is guided by a rail that extends straight in the running direction of the belt. By reciprocating, the blade of the scraper device and the surface of the belt are brought into contact with each other, and the deposits deposited and deposited on the surface of the belt are scraped and removed appropriately and effectively, and are in contact with the surface of the belt. Since the blade to be engaged is formed with a curved surface that bends in the traveling direction of the traveling unit that reciprocates across the belt-like body, there is no unnecessary catch between the blade and the belt-like body, The mutual movement is performed smoothly, the desired deposit scraping is performed properly, and it functions smoothly without deposits accumulating on the back side of the blade. Improve operational efficiency Those were Unishi.
[0020]
Further, according to the present invention, as the second means, in the first means, the traveling part is provided with a means for setting a pressing force of the blade and an adjusting means for adjusting the tension of a spring for urging the blade. A body scraper device is provided.
[0021]
That is, according to the second means of the present invention, the blade that is brought into contact engagement with the surface of the belt-like body has a means for setting a pressing force of the blade for the contact engagement, and a spring tension for urging the blade. By cooperating with the adjusting means, it is possible to easily adjust the urging force in response to a change in conditions, etc., along with setting an appropriate blade pressing force, thereby improving the efficiency of operation.
[0022]
According to the present invention, as a third means, in the first or second means, the traveling unit is supported by a pivot mechanism that pivotally supports a blade so as to be reversibly rotatable with respect to the traveling direction of the belt-like body. The present invention provides a strip-shaped scraper device provided with an adjustment spring that biases a rotational force in a direction opposite to the direction.
[0023]
That is, according to the third means of the present invention, the blade that contacts and engages the surface of the belt is further pivotally supported by the pivot mechanism so as to be reversibly rotatable with respect to the traveling direction of the belt. Since the rotational force in the direction opposite to the travel direction of the belt is biased by the adjustment spring, the belt-like body is biased and rotated in the direction opposite to the travel direction of the belt by the cooperation of the pivot mechanism and the adjustment spring. If an abnormal load is applied to the contact surface between the belt-like body and the blade due to foreign matter or the like, the urging force of the adjustment spring is lost and the blade is maintained in contact with the blade. Since it can be escaped, it is appropriate to cope with this kind of abnormal situation, and the operation efficiency is improved without causing fatal damage to the scraper device including the blades.
[0026]
Furthermore, as a fourth means of the present invention, in any one of the first, second, or third means, the blade is scraped from the belt-like body at a position closest to the downstream side of the installation position of the blade. The present invention provides a strip-shaped scraper device provided with a save-all for storing deposits.
[0027]
That is, according to the fourth means of the present invention, the deposits scraped off from the belt-like body by the blade contacting and engaging with the surface of the belt-like body are provided with a saveall at a position closest to the downstream side of the installation position of the blade. Therefore, it is accurately supplemented by the Save All, functions without scattering and dispersion, and improves the efficiency of operation.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
1 is a plan view of the scraper device according to the present embodiment, FIG. 2 is a front view of FIG. 1, FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 5 shows the front details of the blade unit shown in FIG. 4, and FIG. 6 shows the details of the blade.
[0029]
The scraper device according to the present embodiment is installed at a position such as part B of the dryer part 40 shown in FIG. 7, for example, at a relatively flat place of the circulating canvas 43, and downstream thereof. It is installed in a place where the space for installing the saver of the deposit collector is secured.
[0030]
Rails 3a and 3b are fixed to the upper and lower surfaces of the beam 2 mounted between the frames 1a and 1b provided in parallel on both sides of the canvas 43 that circulates in the dryer part 40 of the paper machine. .
[0031]
Reference numeral 5 denotes a fixed plate that constitutes a basic portion of the traveling unit. Wheels 4 are arranged at four corners via axles, and an upper pair of the wheels 4 is engaged with the rail 3a and a lower pair is engaged with the rail 3b. It is configured to move along the rails 3a and 3b.
[0032]
Guides 6 are fixed to the left and right sides of the fixed plate 5, and a moving plate 7 is slidably loosely fitted thereto. A pair of left and right guide shafts 8 a and 8 b fix the upper and lower ends of the moving plate 7. Has been.
[0033]
A screw shaft 9 is rotatably fixed to the center of the upper end of the moving plate 7, and the screw shaft 9 meshes with a seat 10 fixed to the fixed plate 5 by a screw.
Then, by rotating the handle 11 attached to the uppermost end of the screw shaft 9 to the left and right, the moving plate 7 is guided by the left and right guides 6 and moves up and down to force the blades 35 to be described later against the canvas 43. The means for setting is configured.
[0034]
A slide frame 12 is slidably attached to guide shafts 8a and 8b fixed to the movable plate 7 via a slide bearing 39. An arm 33 (to be described later) is located in front of the center of the slide frame 12. The blade unit 13 including the blade holder 34, the blade 35, the adjustment spring 37, and the like is rotatably connected by a pin 24.
[0035]
The bracket 14 fixed to the moving plate 7 is provided with a pair of adjustment screws 15, and is attached between the lower end of the adjustment screw 15 and the slide frame 12 by the bracket 14, the adjustment screw 15, and the like. An adjusting means for adjusting the tension of the pair of springs 16 is configured.
[0036]
Therefore, the blade unit 13 is supported by the spring 16 whose tension is adjusted via the slide frame 12.
[0037]
A cam follower 26 is rotatably attached to the bracket 27 at the center of the lowermost surface of the slide frame 12 in the same direction as the wheels 4. The height of the cam followers 26 increases toward the outer side of the frames 1a and 1b. Cams 28a and 28b having higher heights are attached.
[0038]
The scraper device 30, which includes the fixed plate 5, the left and right guides 6 installed on the fixed plate 5, the moving plate 7, and the blade unit 13, etc., constitutes a traveling portion and faces the side edges of the left and right canvas 43. When moved, the cam followers 26 are arranged and set so as to be positioned immediately above the cams 28a, 28b. When the blade unit 13 reaches the side end of the canvas 43, the cam units 26a, 28b are used to drive the blade units via the cam followers 26. It is the structure which lifts 13 upwards.
[0039]
A chain 18 is fixed to each of the hooks 17 fixed to the left and right of the fixing plate 5 at a substantially central portion in the vertical direction of the fixing plate 5, and the chains 18 are disposed on the frames 1a and 1b on both sides. The sprockets 19a and 19b mesh with the loop.
[0040]
One sprocket 19a is fixed to the drive shaft of the drive unit 25, and the other sprocket 19b is rotatably attached to a slide bearing 21 provided on a bracket 20 fixed to the frame 1b. Then, the tension of the chain 18 can be adjusted by moving the slide bearing 21 back and forth with the adjusting screw 22.
[0041]
An overrun detection switch 31 and standby position detection switches 32a and 32b are installed at the tip of the column fixed to the beam 2, and a detection terminal 29 is fixed to the center of the upper end of the fixing plate 5 to respond to both switches. It is.
[0042]
On the downstream side of the canvas 43, a saveall 23 is arranged at an appropriate distance from the installation position of the scraper device 30 but at a so-called closest position as close as possible, and the saveall 23 is fixed to the frames 1a and 1b. Has been.
[0043]
The detailed structure constituting the blade unit 13 will be described in particular with reference to FIGS. 4 and 5. As shown in these drawings, the arm 33 is reversibly rotatable with respect to the traveling direction of the canvas 43. It is attached to the slide frame 12 by a pin 24 as shown.
[0044]
A blade holder 34 is fixed to the lower end of the arm 33, and a blade 35 that extends in the width direction of the canvas 43 and contacts and engages the surface of the canvas 43 is fixed to the blade holder 34 with bolts. Has been.
[0045]
An adjustment bolt 36 is provided at the upper end of the arm 33 so that the spring tension of the adjustment spring 37 attached between the tip of the adjustment bolt 36 and the lower end of the slide frame 12 can be adjusted.
[0046]
That is, when tension is applied to the adjustment spring 37 by the adjustment bolt 36, the arm 33 rotates around the pin 24 in the clockwise direction in the drawing, that is, in a direction against running of the canvas 43, and is thus fixed to the slide frame 12. The stopper 33 is configured to support and position the arm 33 from the lower back surface.
[0047]
6 shows details of the blade 35 in front and cross-section, but the blade 35 has an appropriate size in the direction in which the scraper device 30 moves along the rails 3a and 3b on the contact surface with the canvas 43. It has a curved surface shape with a curvature of.
[0048]
The details of the operation and the like in the present embodiment configured as described above will be described. First, the scraper device 30 is set so as to always stand by on the drive device 25 side before operation.
[0049]
In order to operate the scraper device 30, first, in a controller (not shown), an operation speed (speed at which the scraper device 30 travels across the canvas 43) and a standby time (the scraper device 30 makes one round trip, then 1 Set the time to return.
[0050]
Next, when the start switch is turned “ON”, the scraper device 30 moves to the frame 1b side while scraping off deposits on the surface of the canvas 43 traveling at a predetermined operation speed.
[0051]
When the scraper device 30 moves to the side edge of the canvas 43, the cam follower 26 provided at the lower end thereof contacts the cam 28b, and then the cam 28b pushes up the slide frame 12 through the cam follower 26, and the blade 35 The position is higher than the surface of the canvas 43.
[0052]
Then, the standby position detection switch 32b acts to cause the drive device 25 to start reverse rotation, and the scraper device 30 starts to move toward the start position.
[0053]
At this time, the cam follower 26 comes off the cam 28b at the side end of the canvas 43, the tip of the blade 35 contacts the surface of the canvas 43 with a predetermined pressing force, moves while scraping off the adhering matter, and reaches the start position when it reaches the start position. The detection switch 32a operates to stop. Thereafter, the operation is paused for the previously set standby time, and the same operation is automatically performed again after the standby time has elapsed.
[0054]
When the cam follower 26 and the cams 28a and 28b are brought into contact with each other, a slide bearing 39 is inserted into the sliding surfaces of the slide frame 12 and the guide shafts 8a and 8b. Smooth operation is possible.
[0055]
The overrun detection switch 31 provided outside the standby position detection switches 32a and 32b is a safety switch. If the standby position detection switch does not function, the overrun detection switch 31 operates. Stop.
[0056]
Next, the adjustment of the pressing force of the blade 35 onto the canvas 43 will be described. First, the handle 11 shown in FIG. 3 is turned right or left, and the tip of the blade 35 is in contact with the surface of the canvas 43 as shown in FIG. As shown, the gap (C) between the lower end and the slide frame 12 of the moving plate 7 is set to a reference value (usually about 15 mm).
[0057]
Normally, an appropriate tension is applied to the spring 16 in this state, and the tip of the blade 35 is set so as to contact the canvas 43 while maintaining an appropriate pressing force. If the handle 11 is operated in the direction in which (C) increases, and if it is desired to reduce the pressing force, the handle 11 is operated so that the gap (C) decreases.
[0058]
In addition, when it is desired to change the pressing force beyond the range of the handle operation, the pressing force can be changed by adjusting the adjusting screw 15 to increase or decrease the tension of the spring 16.
[0059]
In other words, the tip of the blade 35 is always in contact with the surface of the canvas 43 via the spring 16, and smoothly responds to irregularities and vibrations of the canvas 43 that runs at high speed, so that the deposits are always applied with a constant pressing force. Can be scraped off.
[0060]
Further, as shown in FIG. 4, since the rotational force acts in the traveling direction of the canvas 43 due to the frictional force from the traveling canvas 43 at the tip of the blade 35, the reaction force to overcome this is adjusted by the adjusting bolt 36. It is obtained by adjusting the tension of the spring 37.
[0061]
Now, when an abnormal force is applied to the tip of the blade 35 due to a large foreign matter mixed in the contact engagement portion between the canvas 43 and the blade 35, the arm 33 is moved in the direction indicated by the curved arrow in the figure. Attempting to rotate in a certain counterclockwise direction causes the adjustment spring 37 to extend, and a restoring force acts.
[0062]
However, when this abnormal load is large and the rotational force is larger, the adjustment spring 37 gradually expands, and the maximum extension point, that is, the upper end support point of the adjustment spring 37 connects the lower end support point and the center of the pin 24. When the line is exceeded, the spring length of the adjustment spring 37 is shortened and acts in the direction of promoting the rotation of the arm 33.
[0063]
That is, the blade 35 automatically jumps up to an abnormal acting force exceeding a certain value from the canvas 43, and the arm 33 rotates and stops to the position shown by the one-dot chain line in FIG. The device will not be damaged.
[0064]
As shown in FIG. 6, since the blade 35 is in contact with the canvas 43 and has a curvature in the direction of movement along the rails 3a and 3b, the blade 35 can move smoothly without being caught. it can.
[0065]
Moreover, as a result of providing this curvature, the contact portion between the blade 35 and the canvas 43 is shortened, and the deposits peeled off from the surface of the canvas 43 are accompanied by the travel of the canvas 43 from both sides of the contact portion of the blade 35. It flows smoothly downstream, and is captured in the saveall 23 arranged at the nearest downstream position.
[0066]
That is, by maintaining an appropriate curvature at the tip of the blade 35, no deposit is deposited on the back side of the blade 35, and the deposit can be easily and reliably collected and processed on the downstream side.
[0067]
The apparatus can be installed not only for the upper canvas 43 but also for the lower canvas 43 with a slight change in specifications such as changing the spring 16 to a compression spring. Usually, the save-all 23 is unnecessary.
[0068]
Although the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to this embodiment, and it goes without saying that various modifications may be made to the specific structure within the scope of the present invention. Absent.
[0069]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the scraper device for a strip-like body that removes deposits adhering to the surface of the strip-like body that circulates like a canvas used in a dryer part of a paper machine, A rail is arranged extending in a direction perpendicular to the traveling direction of the vehicle, and a traveling part that is guided by the rail and reciprocates across the entire width of the belt-like body, and a contact engagement with the surface of the belt-like body provided in the traveling part A scraper device including a blade is formed , and the blade forms a scraper device of the belt-like body by forming a contact surface with the canvas with a curved surface that curves in the running direction of the running portion. The blade of the scraper device can be reciprocated by guiding a scraper device composed of a traveling unit provided with a blade to be joined with a rail extending straight in the traveling direction of the strip. Material adhering deposit on the strip surface properly and effectively scrape removed, also the blade scraper device of the strip is formed by a curved surface to bend the contact surface with the canvas in the running direction of the running part Therefore, the blade that contacts and engages the surface of the strip does not need to be caught between the blade and the strip, and the mutual contact movement is performed smoothly and the desired deposit The scraper is properly scraped, and functions smoothly without deposits accumulating on the back side of the blade, etc., and these combine to improve the efficiency of operation. I was able to get it.
[0070]
According to a second aspect of the present invention, in the first aspect of the present invention, the traveling portion includes a means for setting a pressing force of the blade and an adjusting means for adjusting the tension of a spring that biases the blade. Since the belt scraper device is provided, the blade that is brought into contact with the surface of the belt has a means for setting a pressing force of the blade for the contact engagement, and a spring tension that biases the blade. The adjustment means can be used together to set an appropriate blade pressing force, and the biasing force can be easily adjusted in response to changes in operating conditions, etc. A scraper device could be obtained.
[0071]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the traveling portion includes a pivot mechanism that pivotally supports a blade so as to be reversibly rotatable with respect to a traveling direction of the canvas. Since the belt-shaped scraper device is provided with an adjustment spring that urges the rotational force in the reverse direction with respect to the traveling direction, the blade that contacts and engages the surface of the belt-like body is A blade that is pivotally supported so as to be reversibly rotatable with respect to the traveling direction of the belt and is energized by an adjustment spring with a rotational force that resists the traveling direction of the belt-like body. When an abnormal load is applied to the engagement contact surface between the strip and the blade due to foreign matter etc., it can overcome the biasing force of the adjustment spring and rotate in the same direction as the travel of the strip, so that it can escape. Appropriate response to this kind of abnormal situation Ri, without leading to catastrophic failure of the scraper device including a blade or the like, in which it was possible to obtain a scraper device of the preferred strip to improve the efficiency of operations.
[0073]
Furthermore, according to the invention described in claim 4 , in the invention described in any one of claims 1, 2, or 3 , the blade is scraped from the canvas at a position closest to the downstream side of the installation position of the blade. Since the scraper device of the strip-shaped body is provided by providing a save-all that accommodates the adhered deposit, the deposit scraped off from the strip-shaped body by the blade that contacts and engages the surface of the strip-shaped body is installed in the blade. A suitable strip-shaped scraper device that can be accurately supplemented by a save-all provided at a position closest to the downstream side of the position and that does not have to worry about scattering and dispersion and that improves the efficiency of operation can be obtained.
[Brief description of the drawings]
FIG. 1 is a plan view of a strip scraper device according to an embodiment of the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a cross-sectional view taken along the line AA in FIG.
4 is an enlarged view partially extracting nine main parts of FIG. 3. FIG.
FIG. 5 is a front view of FIG. 4;
6A and 6B are excerpts showing in detail a blade that is a part of FIGS. 4 and 5; FIG. 6A is a front view, and FIG. 6B is a cross-sectional view taken along line BB in FIG.
FIG. 7 is an explanatory diagram showing a general configuration of a dryer part of a paper machine.
FIG. 8 is a plan view showing an example of a conventional deposit removing means.
9 is a cross-sectional view taken along the line CC of FIG.
[Explanation of symbols]
1a, 1b Frame 2 Beam 3a, 3b Rail 4 Wheel 5 Fixed plate 6 Guide 7 Moving plate 8a, 8b Guide shaft 9 Screw shaft 10 Seat 11 Handle 12 Slide frame 13 Blade unit 14 Bracket 15 Adjustment screw 16 Spring 17 Hook 18 Chain 19a 19b Sprocket 20 Bracket 21 Slide bearing 22 Adjustment screw 23 Save all 24 Pin 25 Drive device 26 Cam follower 27 Brackets 28a, 28b Cam 29 Detection terminal 30 Scraper device 31 Overrun detection switch 32a, 32b Standby position detection switch 33 Arm 34 Blade holder 35 Blade 36 Adjustment bolt 37 Adjustment spring 38 Stopper 39 Slide bearing 40 Dryer part 41 Dryers 42a, 42b Guide roll 43 Canvas 44 Paper 45 Calendar 4 Winder 47 digits 48 Rope 49 wire mesh scraper 50 roll paper

Claims (4)

In a strip scraper device that removes deposits adhering to the surface of a strip that circulates like a canvas used in a dryer part of a paper machine, the rail is extended in a direction perpendicular to the travel direction of the strip. And a scraper device including a traveling part that is guided by the rail and reciprocally travels across the entire width of the belt-like body, and a blade that is provided in the traveling part and contacts and engages the surface of the belt-like body , A scraper device for a belt-like body, wherein a contact surface with a canvas is formed by a curved surface that bends in a traveling direction of a traveling portion .   2. The scraper device for a belt-like body according to claim 1, wherein the traveling unit is provided with means for setting a pressing force of the blade and an adjusting means for adjusting the tension of a spring for biasing the blade.   The traveling unit is provided with a pivot mechanism that pivotally supports a blade so as to be reversibly rotatable with respect to a traveling direction of the canvas, and an adjustment spring that biases a rotational force in a direction opposite to the traveling direction. The scraper apparatus of the strip | belt-shaped body of Claim 1 or 2. Downstream last position of the installation position of the previous SL blades, according to claim 1, 2 or 3, characterized in that a save-all to accommodate deposits scraped from the canvas at the same blade A scraper device for strips.

Images