JPH0665500U - Doctor blade support device - Google Patents

Abstract

(57) [Summary] [Purpose] To propose a compact doctor blade support device that is suitable for use on rolls with small diameters and for installation in narrow spaces. [Structure] A doctor blade supporting device 1 has a finger portion 3 supporting a doctor blade 2 and a holder portion 4 supporting the finger portion 3. In the finger portion 3, the support rod 33 is sandwiched between the finger piece 32 and the bottom plate 34, and first and second gaps 36 and 37 are formed on the tip side and the base end side, respectively, for opening. And pressurizing air tubes 38, 39
Is stored. The first gap has a cross-sectional dimension that is approximately half or less that of the second gap, and the opening air tube 38 having a small cross section is housed therein. Since the length L from the center of the support rod 33 to the blade edge 2a of the doctor blade can be reduced, the device can be made compact. Also, the pressing force can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a supporting device for a doctor blade used for scraping off the deposits adhering to the surface of a paper machine roll, a work roll used in a skin pass mill, and other rolls.

[0002]

[Prior art]

 In a skin pass mill line used for surface treatment of steel sheets, a large number of rolls including work rolls are used. Foreign substances such as dust adhere to the surface of these rolls during use. A doctor blade is provided for each roll to scrape off such deposits. The supporting device that supports the doctor blade generally includes a finger portion that supports the doctor blade and a holder portion that supports the finger portion. With this support device, the doctor blade can be rotated from a pressure position where it is pressed against the roll surface with a predetermined pressing force to an open position where it is separated from the roll surface.

Here, as a mechanism for pressing and releasing the doctor blade, a pair of air tubes is arranged in the finger portion supporting the doctor blade, and these are inflated and contracted. It has been known.

[0004]

[Problems to be solved by the device]

 Such a doctor blade supporting device is installed for each roller as described above. For this reason, if the size of the device is large, there is a problem in that the installation location must be taken into consideration. In some cases, the arrangement of the rolls must be reassembled to secure the installation location for the doctor blade support device. In particular, in recent years, because of the use of rolls with a small diameter, it is often the case that the installation location of the doctor blade support device has to be troubled. Therefore, there is a need for a doctor blade support device having a small device size.

An object of the present invention is to propose a compact doctor blade supporting device, focusing on this point.

[0006]

[Means for Solving the Problems]

 The doctor blade supporting device of the present invention comprises a doctor blade having a cutting edge portion that is pressed against the outer peripheral surface of the roll, a fine finger portion supporting the doctor blade, and a finger portion in the longitudinal direction of the doctor blade. And a holder part that is rotatably supported about an extending rotation axis. The rotation axis is sandwiched between the finger part and the holder part, and a first gap is provided on the doctor blade side. Is formed, and a second gap is formed on the other side, and for rotating the doctor blade about the rotation axis in a direction away from the outer peripheral surface of the roll, the second gap is formed. An opening air tube is arranged, and the doctor blade is swung in the second gap in a direction of pressurizing the outer peripheral surface of the roll about the rotation axis. Pressurizing air tube is arranged for. The width and length of one of the first and second gaps is set to be smaller than the width and length of the other gap, and each gap has a dimension corresponding to the size of each gap. I am trying to attach the air tube of.

An air tube for opening is installed in a doctor blade support device that requires a small amount of turning to open the doctor blade, a doctor blade support device that requires a relatively large doctor blade pressing force, and the like. Set the width and length of the first gap to a small size. On the contrary, in a doctor blade supporting device or the like that requires a large amount of turning to open the doctor blade, the width and length of the second gap in which the pressurizing air tube is mounted are set to a small dimension.

In the doctor blade supporting device of the present invention, one side of the mounting portion of the air tube for pressurizing and releasing is made small. By doing so, the length of the supporting device can be reduced, and the size of the entire device can be made compact accordingly.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entire configuration of the doctor blade supporting device of this example. The doctor blade supporting device 1 includes a finger portion 3 that supports the doctor blade 2, a holder portion 4 that supports the finger portion 3, and a support base 5 that supports the holder portion. .

The doctor blade 2 has an elongated rectangular shape as a whole, is arranged such that its long side is parallel to the rotation axis of the roll 11, and has a cutting edge on the long side edge facing the roll surface 11 a. 2a is formed.

As shown in FIGS. 1 and 2, the Dakuk blade 2 has a finger portion so that it can be swung between a state in which its blade edge 2a is pressed against the roll surface 11a and an open state separated from the roll surface. Supported by 3. Further, the holder part 4 supporting the finger parts 3 is also rotatably supported on the support base 5 side by the support shafts 52R and 52L so that the holder part 4 supporting the finger parts 3 can be swung about a rotation axis parallel to the rotation axis of the roll 11. It is being touched.

FIG. 3 shows a detailed structure of the finger portion 3 and the holder portion 4. The finger portion 3 supporting the doctor blade 2 has a top plate 31, a plurality of finger pieces 32 mounted in parallel on the back surface side, and a through hole formed on the back surface side of each finger piece 32. The support rod 33 extends through the support rod 33. A protrusion 32b having an L-shaped cross section is integrally formed on the tip side of each finger piece 32. The front end side of the doctor blade 2 is vertically sandwiched between the upright portion 32c at the tip of the protrusion 32b and the top plate 31. A projecting portion projecting in a substantially semicircular shape is formed on the back surface side of each finger piece 32, and a through hole through which the above-mentioned support rod 33 penetrates is formed therein.

On the other hand, a bottom plate 34 is attached to the upper surface of the tip portion 4a of the holder portion 4, and brackets 35R and 35L are fixed to both ends of the bottom plate 34 by holder attaching screws 36R and 36L. Has been done. Both ends of the support rod 33 are rotatably supported by the pair of brackets 35R and 35L. That is, the finger portion 3 is capable of turning around the axis of the support rod 33.

As described above, the finger pieces 32 are supported at a predetermined height position from the upper surface of the bottom plate 34 by the brackets 35 R, 35 L and the support rod 33, and the finger pieces 32 and the bottom plate 34 are supported. The support rod 33 is sandwiched between the first and second gaps 36 and 37.

The first gap 36 has a cross-sectional shape in which the gap is narrowed toward the front due to a portion of the bottom plate 34 that is inclined obliquely upward from the tip portion 4 a of the holder portion. An opening air tube 38 is stored. At the front end of the first gap 36, there is a protruding portion 32d that protrudes downward from the rear surface on the tip side of each finger piece 32, so that the opening air tube 38 housed therein does not come out. ing.

On the other hand, the second gap 37 is set at a constant interval, and the pressurizing air tube 39 is housed in the second gap 37. At the rear end of the second gap, there is a bent portion in which the base end side of the bottom plate 34 is vertically bent upward, and the pressurizing air tube 39 contained therein does not come out. It is like this. As can be seen from FIG. 3, the gap G1 and the width L1 of the first gap are set to about half the gap G2 and the width L2 of the second gap.

In the doctor blade support device 1 of the present embodiment configured as described above, among the air tube placement gaps 36 and 37 formed before and after the support rod 33 which is the center of rotation of the finger portion 3, The front gap 36 is made smaller. Therefore, the length L from the center of the support rod 33 to the blade edge 2a of the doctor blade 2 is shortened as compared with the conventional device in which both air tubes have the same size as the pressurizing air tube. be able to. Therefore, the doctor blade supporting device 1 can be configured compactly.

Further, when the length L is shortened in this way, it is possible to increase the pressing force (lip pressure) to the roll surface 11a of the doctor blade 2 generated by expanding the air tube 39. There is also.

Next, FIG. 4 shows a finger portion and a holder portion in a doctor blade supporting device according to another embodiment of the present invention. The overall structure of the device of this example is the same as that of the above example, and corresponding parts are designated by the same reference numerals and their description is omitted. In the device of this example, the first gap 36A is set to have a size larger than that of the second gap 37A, and among them, the opening air having a size corresponding to these sizes is provided. A tube 38A and a pressurizing air tube 39A are stored. Also in the device having this configuration, the entire device can be made compact. Further, there is also an advantage that a swirling amount (opening allowance) at the time of opening can be made larger than in the case where the pressurizing air tube 39A having the same size as the opening air tube 38A is arranged.

[0021]

[Effect of device]

 As described above, according to the doctor blade supporting device of the present invention, one of the pair of gaps for accommodating the air tube for pressing and opening the doctor blade is set to be smaller than the other side, Each air tube of a size corresponding to these gaps is housed in these gaps. Therefore, the device can be made compact, and a compact doctor blade supporting device suitable for use in a roll having a small diameter or for installation in a narrow space can be realized.

Further, according to the present invention, when the pressurizing air tube is set to a large size, it becomes easy to apply a large pressing force, and conversely, the opening air tube is set to a large size. In this case, it is possible to obtain an advantage such as a large opening fee.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a doctor blade supporting device according to an embodiment of the present invention.

FIG. 2 is a partial side view showing a state of the apparatus of FIG. 1 viewed from a side surface side.

FIG. 3 is a partial configuration diagram showing a configuration of finger portions of the doctor blade supporting device of FIG.

FIG. 4 is a configuration diagram of a main part of a doctor blade supporting device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Doctor blade support device 2 ... Doctor blade 2a ... Blade edge 3 ... Finger part 31 ... Top plate 32 ... Finger piece 33 ... Support rod 34 ... Bottom plate 36 , 36A ... First gap 37, 37A ... Second gap 38, 38A ... Opening air tube 39, 39A ... Pressurizing air tube 4 ... Holder portion 11 ... Roll 11a ... Roll surface

Claims (4)

[Scope of utility model registration request] 1. A doctor blade having a cutting edge portion which is pressed against the outer peripheral surface of a roll, a finer portion supporting the doctor blade, and a finger portion provided with a rotation axis extending in the longitudinal direction of the doctor blade. And a holder part that is rotatably supported at the center, the finger part and the holder part sandwich the rotation axis, and a first gap is formed on the doctor blade side, A second gap is formed on the other side, and an opening air tube for rotating the doctor blade in the direction away from the outer peripheral surface of the roll about the rotation axis is arranged in the first gap. In the second gap, there is a pressurizing air tube for swirling the doctor blade around the rotation axis in a direction of pressurizing the outer peripheral surface of the roll. The doctor blade support device is arranged, the first gap has a smaller dimension than the second gap, and the opening air tube has a smaller cross-sectional dimension than the pressurizing air tube. 2. The doctor blade supporting device according to claim 1, wherein the opening air tube has an inner diameter of about 15 mm, and the pressurizing air tube has an inner diameter of about 30 mm. 3. A doctor blade having a cutting edge portion that is pressed against the outer peripheral surface of the roll, a finer portion supporting the doctor blade, and a finger axis that extends in the longitudinal direction of the doctor blade. And a holder part that is rotatably supported at the center, the finger part and the holder part sandwich the rotation axis, and a first gap is formed on the doctor blade side, A second gap is formed on the other side, and an opening air tube for rotating the doctor blade in the direction away from the outer peripheral surface of the roll about the rotation axis is arranged in the first gap. A pressure air tube for rotating the doctor blade in the second gap in a direction of pressing the doctor blade on the outer peripheral surface of the roll about the rotation axis. And the second gap has a smaller dimension than the first gap, and the pressurizing air tube has a smaller cross-sectional dimension than the opening air tube. . 4. The doctor blade support device according to claim 1, wherein the opening air tube has an inner diameter of about 15 mm, and the pressurizing air tube has an inner diameter of about 30 mm.