JPH07166491A - Doctor apparatus for paper-making - Google Patents

Abstract

PURPOSE:To obtain a paper-making doctor apparatus having a compact size, producible at a low cost and capable of improving the reaction in the approach and separation of a blade relative to a roll surface. CONSTITUTION:A supporting member 3 is loosely fit in a freely movable manner on a shaft lever 2 rotatably supported on a bearing 9. A blade 4 is clamped with the supporting member 3 and a pressing member 14. The tip end of the blade is pressed against the surface of a roll 8 with a pressing means 5. A working member 6 having an operation part 16 is fixed to the shaft lever 2, the supporting member 3 is turned by turning the shaft lever 2 and the pressing of the blade 4 on the roll surface 8 is released by a releasing means 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a papermaking doctor device used in the papermaking industry.

[0002]

2. Description of the Related Art Conventionally, as a doctor device used in the paper manufacturing industry, for example, a device 30 shown in FIG. 4 is known.

In this device, a blade 32, which is pressed against the outer peripheral surface of a roll 31, is mounted on a blade mounting portion 34 of a supporting member 33 via a blade holder 35 by a plurality of mounting screws 36.

The supporting member 33 is swingably supported by brackets 38 provided on both ends of the doctor back 37 by a support shaft 39, and the supporting member 33 and the doctor back 37 are supported.
A pair of air tubes 40, 41 are mounted on both sides of the support shaft 39 with the support shaft 39 interposed therebetween, and the air is supplied to the one air tube 40 to apply pressure to the surface of the roll 31 of the blade 32. By doing so, the pressure on the roll 31 of the plate 32 is released by supplying air to the other air tube 41.

However, since the device of this structure uses two air tubes having a predetermined size,
The whole is large in size, takes up a lot of space, causes inconvenience in mounting the device, and the manufacturing cost is so high that it cannot be provided at a low cost.

[0006] In particular, when releasing the pressing force of the blade from the roll surface using an air tube, since the air supply capacity is large, the responsiveness / quickness is low even when air is supplied, and the blade tip portion. The distance between the roll surface and the roll surface is small, and the blade is not opened sufficiently for the roll.Therefore, there is a problem that the air supply amount to the air tube is large despite the small operating amount. It was

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a support member is loosely fitted to a shaft rod rotatably supported by a bearing, By holding the blade by the support member and the pressing member,
The tip of the blade is pressed against the roll surface by a pressurizing means, the operating body having the operating portion is fixed to the shaft rod, and the support member is rotated by the rotation of the shaft rod to press the blade on the roll surface. An object of the present invention is to provide a paper-making doctor device capable of being manufactured compactly and inexpensively by performing the release by means of the opening means, and improving the responsiveness of contact and separation of the blade with the roll surface.

[0008]

Means for Solving the Problems The means of the present invention for achieving the above-mentioned object is a frame provided in the vicinity of a roll, and an axial rod rotatably supported by a bearing attached to the frame. The support member is slidably fitted to the shaft rod, a pressing member mounted on the support member, and a front side portion of the support member are sandwiched between the support member and the roll. A blade whose tip is pressed,
A pressure means for interlocking with the supporting member for urging the blade tip of the supporting member to press the roll surface, and a fixing means for the operating portion to project to the shaft rod so that the shaft rod rotates. A papermaking doctor provided with an actuating member whose operation portion comes into contact with the supporting member at this time, and an opening unit which is linked to the shaft rod and releases the pressure applied to the roll surface of the blade by the pressure applying unit. In the configuration of the device.

[0009]

The present invention configured as described above has the following operations.

The blade contacting the outer peripheral surface of the roll is attached to the supporting member in a pressed state by the pressing member, and this supporting member is supported in a loosely fitted state on the shaft rod supported by the bearing of the frame.

Therefore, when the pressurizing means linked to the supporting member is operated, the supporting member, that is, the blade swings around the supporting shaft, and the tip of the blade comes into contact with the roll surface. When the pressing means is operated, the contact pressure changes.

On the other hand, when releasing the contact of the blade tip portion with the roll surface, when the opening means is operated, the shaft rod is rotated, and the actuating body having the operating portion fixed to the shaft rod comes into contact with the support member. Since the operation of rotating the supporting member about the support shaft is performed, when the opening means is further operated, the operating portion of the operating body presses the supporting member to rotate the supporting member, and the blade tip portion is moved. It separates from the roll surface with this rotational movement.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the paper-making doctor device according to the present invention will now be described with reference to the drawings.

In FIG. 1 and FIG. 2, A is a doctor device used in the paper manufacturing industry, which is a frame 1 and a shaft rod 2.
The support member 3, the blade 4, the pressurizing means 5, the actuation body 6, and the opening means 7 are basically configured.

The frame 1 has a predetermined width and is provided in the vicinity of the roll 8 that conveys the paper. The frame 1 corresponds to the width of the roll 8 to the bearing 9 provided on the upper portion thereof. A shaft rod 2 having a length is rotatably supported.

The support member 3 is made of an elastic material such as synthetic resin, and is loosely fitted into the shaft rod 2 so that the push-up plate 10 is sandwiched below the support member 3. Then, a large number of bearing pieces 11 are fixed at intervals, and the bearing pieces 11 are attached to the shaft rod 2
The support member 3 can be freely rotated about the shaft rod 2 by being attached to the shaft rod 2.

The above-mentioned blade 4 is such that the tip portion of the blade 4 is pressed against the outer peripheral surface of the roll 8 at a predetermined angle to scrape off liquids such as water and the like adhering to the surface of the roll 8 and support it. The notch 12 provided on the front side of the member 3 is engaged with the locking portion 13 of the base thereof, and is stabilized by the supporting member 3 and the pressing member 14 mounted on the supporting member 3 by a fastening member 14a such as a bolt. Be held in a proper manner.

Since the notch 12 formed in the support member 3 is formed in a groove shape with respect to the entire length in the longitudinal direction, the liquid falling along the blade 4 flows into the notch 12 and the notch 12 is formed. Since it flows out from both ends of 12, the inconvenience that the liquid adheres to the roll 8 again is eliminated.

The pressing member 14 is formed in a plate shape having substantially the same width dimension as the supporting member 3, that is, the blade 4 and having elasticity and rigidity, and is adapted to the twisting or bending of the blade 4 and the blade 4 Is uniformly contacted with the roll 8 surface.

The above-mentioned pressurizing means 5 urges the tip of the blade 4 of the supporting member 3 to press against the surface of the roll 8, and uses an air tube operated by air pressure. The push-up plate 10 integrally attached to the member 3 by a fastening member such as a bolt is linked to the upper surface of the frame 1.

When air is supplied to the air tube 5, the air tube expands due to air pressure.
The supporting member 3 is rotated about the center of the roll, and the blade 4 is tilted toward the surface of the roll 8 due to the turning force, and the tip portion of the blade 4 comes into contact with the roller 8 to make a predetermined pressure contact.

The push-up plate 10 is formed of a plate material having substantially the same width as that of the support member 3, and at the contact portion with the pressurizing means 5, as shown in FIG. Since a large number of slits 15 are formed in the upper part, the rigidity of the push-up plate 10 is alleviated and flexibility is exerted on the pressure applied by the pressurizing means 5.

The above-mentioned actuating body 6 is formed in a rod shape, and a plurality of bases are fixed to the shaft rod 2 at intervals so that the operating portions 16 thereof project to the lower surface side of the supporting member 3, and the shaft rod 2 is fixed. When the rotating member rotates, the rotating member rotates and the operating portion 16 comes into contact with the bottom portion of the supporting member 3.

The above-mentioned opening means 7 is linked to the shaft rod 2 to release the pressure applied to the roll 8 surface of the blade 4 by the pressing means 5, and uses a fluid cylinder such as pneumatic pressure. Lever 18 with one side pivotally supported by the rod 17
The other side is fixed to the outer end portion of the shaft rod 2 by a pin 19 and is provided so as to operate synchronously on one side or both sides of the shaft rod 2.

Then, the rod 17 in this opening means 7
1 is extended, the actuator 6 in the tilted state in FIG.
However, when the shaft rod 2 is rotated via the lever 18, the shaft rod 2 rises as shown in FIG. 2, and the operating portion 16 pushes up the bottom portion of the support member 3, so that the support member 3 is centered on the shaft rod 2. It rotates and separates the tip of the blade 4 attached to its front side from the roll 8 surface.

The doctor device A is equipped with the blade 4
When the blade 4 is in contact with the roll 8, the blade 4 and its pressing member 14 are attached to the frame 1 so as to be inclined downward, so that the liquid scraped by the blade 4 that cannot be accommodated in the notch 12 is scraped off. Since the liquid etc. flows down along this slope and hits the rising piece 1a of the frame 1 and is discharged to the side, the working environment is improved without the liquid etc. flowing out from the roll being scattered around unlike the conventional device.

When the blade 4 is brought into contact with the surface of the roll 8 to scrape off liquid such as the surface of the roll 8 in the doctor apparatus A for papermaking of the embodiment of the present invention configured as described above, FIG. As shown in FIG.
When the opening means 7 is operated to extend the rod 17 and the shaft rod 2 is rotated via the lever 18 in the state of being separated from the surface, the operating body 6 fixed to the shaft rod 2 is rotated. The operating portion 16 is separated from the bottom of the support member 3.

In this state, when air is supplied into the air tube 5 which is a pressurizing means, the expanding force pushes the push-up plate 10 attached to the support member 3, so that the support member 3 rotates around the shaft rod 2. When the blade 4 moves, the tip of the blade 4 comes into contact with the surface of the roll 8 as shown in FIG. 1, and by adjusting the amount of air supply (pressurizing force) to the air tube 5, the blade 4 is properly The contact pressure on the roll is obtained.

Therefore, as the surface of the roll 8 rotates, the blade 4 carries out an appropriate scraping operation of the liquid.

Next, when the liquid scraping work on the surface of the roll 8 by the blade 4 is released, the air tube of the pressurizing means 5 is evacuated and the air cylinder 7 which is the opening means is operated to pull back the rod 17. Along with this, the shaft rod 2 is rotated via the lever 18, and the operating body 6 fixed to the shaft rod 2 is rotated toward the bottom surface of the support member 3, and its operating portion 16 is Abut on the support member 3.

Further, when the air cylinder 7 is operated,
Since the operating portion 16 of the actuating body 6 pushes up the supporting member 3, the supporting member 3 rises up around the shaft rod 2 and, as shown in FIG. 2, the tip of the blade 4 is separated from the surface of the roll 8 at a desired distance. To do.

At this time, the rotation angle of the actuating member 6 fixed to the shaft rod 2 becomes the amount of rotation of the support member 3 loosely fitted in the shaft rod 2 as it is. A large amount of movement and turning power can be obtained.

[0033]

According to the present invention configured as described above, since the operating member is operated by the opening means and the operating force is immediately transmitted by the rotation of the shaft rod, the blade can be brought into contact with or separated from the roll surface. Since the responsiveness is good and reliable, and the actuating body and its related structure are simple, the present invention has a unique effect that the entire apparatus can be manufactured compactly and at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a main part of a papermaking doctor apparatus according to the present invention, showing a state where a blade is in contact with a roll surface.

FIG. 2 is a partially cutaway side view showing a state where the blade in FIG. 1 is separated from a roll surface.

FIG. 3 is a partial perspective view showing a state in which a main part in FIG. 1 is disassembled.

FIG. 4 is an explanatory view showing a conventional doctor device.

[Explanation of symbols]

 1 Frame 2 Shaft Rod 3 Supporting Member 4 Blade 5 Pressurizing Means 6 Actuator 7 Opening Means 9 Bearing 14 Pressing Member 16 Operation Section

Claims (1)

[Claims] 1. A frame provided in the vicinity of a roll, a shaft rod rotatably supported by a bearing mounted on the frame, a support member swingably fitted in the shaft rod, and a support member for the support member. A blade held between a pressing member mounted on the member and a front side of the support member, and having its tip end pressed against the outer peripheral surface of the roll at a predetermined angle, and the support member in cooperation with the blade. A pressing means for urging the blade tip of the member to press it against the roll surface, and an operating part fixed to the shaft rod so that the operating part projects, and the operating part contacts the supporting member when the shaft rod rotates. A doctor device for papermaking, comprising: an actuating member in contact with the shaft rod; and an opening unit that is linked to the shaft rod to release the pressure applied to the roll surface of the blade by the pressure unit.