JP4548693B2 - Doctor device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a doctor device. More specifically, the present invention relates to a doctor device having a function of actively dropping an object scraped from the outer peripheral surface of a roller by sliding of the doctor blade itself.
[0002]
[Prior art]
For example, a doctor device for squeezing and wiping the outer peripheral surface of a roller such as a guide roller of a loop car in a steelmaking rolling process or a calendar guide roller in a papermaking plant is attached. This type of doctor device includes a doctor blade that contacts the outer peripheral surface of the roller, and dust or the like that wraps around the outer peripheral surface of the roller and falls from a work that travels is scraped off by the doctor blade.
[0003]
[Problems to be solved by the invention]
In such a doctor device, a means for removing dust scraped on the doctor blade as soon as possible is required.
As one of the means, by sliding the doctor blade in the left-right direction, that is, in the direction parallel to the axis of the roller, the dust can be actively dropped from the doctor blade while the doctor blade is in contact with the roller. Can be considered. Specifically, the doctor blade is supported so as to be movable in the left and right directions within a certain range, and a driving device such as an electric motor or a hydraulic motor is connected to a roller device provided with the roller, and a slide driven by the driving source. A structure in which a moving mechanism is mounted and the doctor blade is slid to the left and right by this sliding mechanism is conceivable.
[0004]
However, in this type of roller device, there is a type in which the position is changed by moving a distance of several tens of meters or more while the workpiece is running while performing processing that occurs at any time. In addition, the scooping of the electric cord and hydraulic oil hose connected to the drive source described above becomes very large, which not only increases the cost but also affects the movement of the roller device. .
[0005]
The present invention has been made in view of such problems, and the doctor blade can be slid without a special drive source, and the manufacturing cost can be reduced and the structure can be made compact. An object of the present invention is to provide a novel doctor device that does not require wiring or piping to follow the movement of the roller even if the roller moves.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the doctor device according to claim 1 includes a doctor blade that contacts the outer peripheral surface of the roller, and blade support means that supports the doctor blade so as to be movable in a direction parallel to the axis of the roller. And a rotational motion capturing means for capturing the rotational motion of the roller, and a motion conversion mechanism for converting the rotational motion captured by the rotational motion capturing means into a linear reciprocating motion in a direction parallel to the roller axis and transmitting the linear motion to the doctor blade. It is characterized by comprising.
[0007]
According to this doctor device, the doctor blade can be slid in a direction parallel to the axis of the work roller without providing a special drive source. There is no need to connect a cord or oil hose. Therefore, the manufacturing cost can be very low and the size can be made compact. Even if the roller device is of a type that moves at any time, there is almost no hindrance to the movement.
[0008]
The doctor device described in claim 2 is characterized in that, in the doctor device described in claim 1, the rotational motion taking-in means is a friction wheel contacting the roller.
If it does in this way, a rotation taking-in means and a motion conversion mechanism can be easily attached also to an existing roller device.
The position where the friction wheel is brought into contact is not limited to the outer peripheral surface of the roller but may be an end surface, but the position in the case of contacting the outer peripheral surface is an angle outside the angular range around which the workpiece is wound on the outer peripheral surface of the roller. Select within the range.
[0009]
The doctor device described in claim 3 is characterized in that in the doctor device described in claim 2, a resilient means for pressing the friction wheel against the outer peripheral surface of the roller is provided.
By doing in this way, the taking-in of the rotation by a friction wheel can be performed reliably.
As a form which embodies this invention, the form etc. which attach the bearing which supported the axis | shaft of the friction wheel to a movable member, and urge | bias the movable member to the said roller side by a resilient means can be considered, for example.
[0010]
The doctor device according to claim 4 is the doctor device according to any one of claims 1 to 3, wherein the motion conversion mechanism includes an eccentric rotating member that rotates by the rotational motion taken in by the rotary motion taking-in means, and the eccentric rotation. And a pressed part that is pressed by a member in a direction parallel to the axis of the roller.
In general, the motion conversion mechanism of this form can be configured in a small size, and the operability is stable, so that the means for sliding the doctor blade can be configured more compactly.
This pressed portion may be provided on the doctor blade itself or on a member that moves integrally with the doctor blade.
[0011]
The doctor device according to claim 5 is the doctor device according to any one of claims 1 to 4, wherein the blade support means is a rod integral with the doctor blade, and the rod slides in a direction parallel to the axis of the roller. A bearing that is supported freely and pivotably. The position switching mechanism for contacting and separating the doctor blade with respect to the roller and the rod are moved by the operation of the position switching mechanism. It is characterized by being coupled so as to be rotated.
Therefore, the doctor blade can be slid without impairing the basic function of contacting and separating the doctor blade from the roller as needed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Details of the doctor apparatus according to the present invention will be described below according to the embodiment shown in the drawings. A doctor device 1 shown in this embodiment is mounted on a loop car 3 in a steelmaking rolling process.
[0013]
[A. Overview of Loop Car] (Figure 1)
Reference numeral 5 denotes a bogie of the loop car 3. This carriage 5 rides on a rail 7, and on the upper surface, in the left-right direction (the front side toward the right side in FIG. 1 is the right side, and the direction toward the right side in the same figure is the front side. The main machine frame 9 having an isosceles trapezoidal shape as viewed from the above and the rear machine frame 11 and the like rising from the rear are provided, and bearings 13 are fixed to the upper surfaces of the left and right ends of the main machine frame 9, Another bearing 13 ′ is fixed immediately below the bearing 13 on the upper surface of the carriage 5.
[0014]
A guide roller 15 is supported on the upper bearing 13, and another guide roller 15 ′ is rotatably supported on the lower bearing 13 ′. A work 17 such as a rolled iron plate is supported on these guide rollers 15, 15 ′. Wrap around and run.
Between the main machine frame 9 and the rear machine frame 11, a gantry 19 for installing the doctor device 1 is stretched across two horizontal bridges.
Such a loop car 3 travels several tens of meters at any time and changes its position.
[0015]
[B. Doctor device] (Figs. 1-5)
The doctor device 1 is disposed so as to face the upper guide roller 15 later.
[B-1. Support base, thrust bearing] (Figs. 1-4)
21R and 21L show the support base of the doctor apparatus 1. FIG. These support bases 21L and 21R are fixed to the upper surfaces of the left and right mounts 19, respectively, and have a vertical wall 23 facing in the front-rear direction, and a bracket 24 projects forward from the vertical wall 23. .
Thrust bearings 25 are fixed to the upper surface of the bracket 24, respectively.
These two thrust bearings 25 are provided in a state in which the through-holes are positioned coaxially with each other in the left-right direction.
[0016]
[B-2. Doctor blade] (Figs. 1-4)
Reference numeral 31 denotes a doctor blade. The doctor blade 31 is made of polyethylene and is formed in a strip shape that is substantially the same as the axial length of the guide roller 15 and is long in the left-right direction, and one end in the width direction is a cutting edge 31a.
Reference numeral 33 denotes a blade holder. The blade holder 33 has an angle steel-like shape that is long in the left-right direction (see FIG. 3), and has a substantially chevron-like posture when viewed from the left-right direction. The blade contact adjusting mechanism 35 is provided on the back surface of the front half. A doctor blade 31 is attached through the gap. The doctor blade may be made of a metal plate.
[0017]
Holder support rods 37 extending in the left-right direction are fixed to the left and right ends of the blade holder 33. These holder support rods 37 are fixed near the top of the ridge of the blade holder 33, and are provided in a state in which almost half in the longitudinal direction protrudes from the blade holder 33 to the side.
A portion of the holder support rod 37 protruding from the blade holder 33 has a round bar shape, and the round bar portion is slidably and rotatably passed through the thrust bearing 25.
Accordingly, the doctor blade 31 is provided so as to face the guide roller 15 from the rear side and be movable in a direction parallel to the axis of the guide roller 15.
[0018]
[B-3. Blade position switching mechanism] (FIGS. 1, 2, and 4)
Reference numeral 41 denotes a blade position switching mechanism. This blade position switching mechanism 41 has functions such as separating the doctor blade 31 from the guide roller 15 as needed and adjusting the contact state of the doctor blade 31 with the guide roller 15 in a buffering manner. Is provided.
A lever support bracket 43 is fixed to the upper surface of the left thrust bearing 25, and a lever support shaft 45 is slidably supported in the left-right direction on the upper end of the lever support bracket 43 in the shape of a horizontally long pipe.
[0019]
Reference numeral 47 denotes an operation lever. The upper end portion of the operating lever 47 is a connecting portion 47a having a U-shape when viewed from above, and the left end of the lever support shaft 45 is fixed to the lower portion of the right side wall of the connecting portion 47a.
[0020]
Reference numeral 51 denotes a connection link. The connecting link 51 is connected so that the horizontal bar 51a and the vertical bar 51c form a substantially L shape when viewed from the side, and the chuck portion 51b fixed to the rear end of the horizontal bar 51a has a left holder. The left end portion of the support rod 37 is held, and a spring seat 51d is attached to the upper end portion of the vertical rod 51c. The spring seat 51d is inserted into the spring holder 53 from below. The spring holder 53 is formed by screwing a lower cap 53a and an upper 53b together, and has a vertically long and substantially cylindrical shape with both ends closed, and is compressed between its bottom wall and a spring seat 51d. The coil spring 55 is incorporated, and an arm 57 protruding upward from the top wall of the upper cap 53b is provided. The upper end of the arm 57 is rotated around the upper end of the connecting portion 47a of the operation lever 47 by a pin 59. It is connected freely.
[0021]
Since the spring seat 51d is pressed upward by the coil spring 55, it is pressed against the top wall of the upper cap 53b in a state where it is not pressed downward relatively. When the operation lever 47 is in the standing posture shown by a solid line in FIG. 4, that is, in a state where the pin 59 is positioned directly above the lever support shaft 45 when viewed from the side, the position of the pin 59 is defined. As a result, the height position of the spring holder 53 is defined, whereby the shape of the connecting link 51 is defined, and the position of the holder support rod 37 in the direction around the axis is determined. In this state, the cutting edge 31a of the doctor blade 31 makes slight contact with the outer peripheral surface of the guide roller 15 as indicated by a solid line in FIG.
[0022]
When a pressing force from the front is applied to the blade edge 31a for some reason from this state, the holder support rod 37 rotates in the clockwise direction in FIG. When the pressing force is released, the coil spring 55 returns to its original state. In this way, the contact state of the doctor blade 31 with respect to the guide roller 15 is automatically adjusted in a buffered manner.
[0023]
When the operation lever 47 is raised from the standing posture and moved upside down to the inverted posture shown by the two-dot chain line in FIG. The horizontal rod 51a is rotated in the clockwise direction in FIG. With this rotation, the holder support rod 37 rotates integrally with the blade holder 33 and the doctor blade 31, so that the doctor blade 31 is largely separated rearward from the guide roller 15 as indicated by a two-dot chain line in FIG. .
When the operating lever 47 is returned to the standing posture from this state, the doctor blade 31 returns to the original position where it contacts the guide roller 15.
[0024]
[B-4. Blade sliding mechanism] (FIGS. 1 to 5)
Reference numeral 61 denotes a blade sliding mechanism. The blade sliding mechanism 61 is a mechanism for sliding the doctor blade 31 in the left-right direction, is attached to the right support base 21R, and uses the rotational force of the guide roller 15 as a driving force. Yes.
[0025]
A movable base 63 is attached to the upper portion of the vertical wall 23 of the right support base 21R so as to face the front from the front. The movable base 63 has a rectangular plate shape that is long in the left-right direction, and the lower side portion thereof is supported by the vertical wall 23 via a pivot 65 (see FIG. 4), so that the movable base 63 can rotate substantially in the front-rear direction. The coil spring 67 is inserted between the upper side portion and the vertical wall 23 in a compressed state.
[0026]
On the front surface of the movable base 63, a speed reducer 69 is attached to the right half portion thereof, and two bearings 71 are attached to the left half portion, and a rotating shaft 73 extending in the left-right direction is attached to the bearing 71. Is supported. A friction wheel 75 is fixed to the left end portion of the rotating shaft 73, and the right end portion of the rotating shaft 73 is connected to an input shaft 69 a of the speed reducer 69 via a coupling 77. The friction wheel 75 faces the right end portion of the outer peripheral surface 15a of the guide roller 15 from above the front side collar.
[0027]
Since the movable base 63 is urged forward by the coil spring 67, that is, toward the guide roller 15, the friction wheel 75 is pressed against the outer peripheral surface 15 a of the guide roller 15 with an appropriate strength by this urging. Therefore, the friction wheel 75 is rotated with the rotation of the guide roller 15, and the rotation of the friction wheel 75 is decelerated by the speed reducer 69 and transmitted to the output shaft 69b.
[0028]
An output shaft 69b (see FIGS. 2 and 5) of the speed reducer 69 extends substantially downward from the casing, and an eccentric ring 81 is fixed to the output shaft 69b. The eccentric ring 81 has a cylindrical shape thicker than the output shaft 69b, and the axis c of the through hole 81a is separated from the axis c 'of the eccentric ring 81 by a distance L, and the output shaft 69b is passed through the through hole 81a. ing. The output shaft 69b and the eccentric ring 81 are fixed to each other by key coupling or the like.
[0029]
A roller 83 is rotatably attached to the tip of the eccentric ring 81. The outer diameter of the roller 83 is much larger than the outer diameter of the eccentric ring 81, and is fitted on the eccentric ring 81 coaxially. Therefore, when the output shaft 69b rotates, the eccentric ring 81 and the roller 83 move circularly about the axis of the output shaft 69b.
[0030]
Reference numeral 85 denotes a cam slider. The cam slider 85 includes a pressed portion 85a having a U-shape opening upward as viewed from the front, and a tubular connecting portion 85b protruding leftward from the left wall of the pressed portion 85a. The roller 83 is fixed in a state where the right end portion of the right holder support rod 37 is inserted into the connecting portion 85b, and the roller 83 is accommodated between the left and right side walls of the pressed portion 85a in the left-right direction with almost no gap. Therefore, when the roller 83 moves in a circular motion, the pressed portion 85a of the cam slider 85 is periodically pressed to the left and right, so that the doctor blade 31 connected to the cam slider 85 is slid to the left and right.
The doctor device 1 is configured as described above.
[0031]
[C. Operation)
Next, the operation of the doctor device 1 will be described.
The guide roller 15 rotates as the workpiece 17 travels. This rotation direction is the counterclockwise direction in FIG.
When the guide roller 15 rotates, the blade edge 31a of the doctor blade that is in contact with the outer peripheral surface 15a relatively squeezes the outer peripheral surface 15a, and the doctor blade 31 slides left and right.
[0032]
Accordingly, the metal powder or the like adhering to the outer peripheral surface 15 a of the guide roller 15 is scraped to the upper surface by the doctor blade 31, and the scraped metal powder or the like is moved left and right by the sliding of the doctor blade 31. It is sent and falls from the end of this doctor blade 31 to the powder receiver 91 (see FIG. 4).
Such an action is continuously performed as long as the guide roller 15 is rotated, and is executed as long as the work 17 travels even if the loop car 3 travels and changes its position.
[0033]
Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the invention.
For example, in the embodiment, the rotational motion capturing means is a friction wheel, but the rotational motion capturing means in the present invention is not limited to this type.
Further, in the embodiment, the present invention is applied to a doctor device for a guide roller provided in a loop car in a steelmaking rolling process. However, the present invention is not limited to such a roller, and a papermaking process, a printing process, and other various processes. It can be widely applied as a doctor device attached to a roller that performs various required operations in the process.
[0034]
【The invention's effect】
As described above, according to the present invention, the doctor blade can be slid in a direction parallel to the axis of the work roller without providing a special drive source. There is no need to connect an electric cord or oil hose to the roller device. Therefore, the manufacturing cost can be very low and the size can be made compact. Even if the roller device is of a type that moves at any time, there is almost no hindrance to the movement.
[0035]
According to invention of Claim 2, a rotation taking-in means and a motion conversion mechanism can be easily attached also to the existing roller apparatus.
[0036]
According to the invention of claim 3, it is possible to reliably execute the rotation taking in by the friction wheel.
[0037]
According to the invention of claim 4, the means for sliding the doctor blade can be made more compact and a stable operation can be guaranteed.
[0038]
According to the invention of claim 5, the doctor blade can be slid without impairing the basic function of contacting and separating the doctor blade from the roller as needed.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a loop car provided with a doctor device according to an embodiment of the present invention.
FIG. 2 is an enlarged front view showing the doctor apparatus shown in FIG. 1 with a part thereof omitted.
3 is an enlarged perspective view of a blade sliding mechanism of the doctor device shown in FIG. 1. FIG.
4 is a left side view of the doctor device shown in FIG. 1. FIG.
FIG. 5 is an enlarged perspective view showing a main part of the sliding mechanism of the doctor device shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Doctor apparatus 15 ... Roller 15a ... Outer peripheral surface 25 ... Bearing 25, 33, 35, 37 ... Blade support means 31 ... Doctor blade 37 ... Rod 41 ... Position switching mechanism 67 ... Bulleting means 69, 81, 83, 85 ... Motion conversion mechanism 75 ... Rotary motion capture means (friction wheel)
81, 83 ... eccentric rotating member 85a ... pressed portion

Claims (5)

A doctor blade that contacts the outer peripheral surface of the roller, a blade support means that supports the doctor blade so as to be movable in a direction parallel to the axis of the roller, a rotational motion capturing means that captures the rotational motion of the roller, and this rotational motion A doctor device comprising: a motion conversion mechanism for converting a rotational motion taken in by the take-in means into a linear reciprocating motion in a direction parallel to the roller axis and transmitting the linear motion to the doctor blade. 2. The doctor apparatus according to claim 1, wherein the rotational motion taking-in means is a friction wheel in contact with the roller. 3. The doctor apparatus according to claim 2, further comprising a resilient means for pressing the friction wheel against the outer peripheral surface of the roller. 4. The doctor device according to claim 1, wherein the motion conversion mechanism includes an eccentric rotating member that rotates by the rotational motion taken in by the rotational motion taking-in means, and a direction parallel to the roller axis by the eccentric rotating member. A doctor device comprising a pressed portion to be pressed. 5. The doctor device according to claim 1, wherein the blade support means includes a rod integral with the doctor blade, and a bearing that supports the rod slidably and rotatably in a direction parallel to the axis of the roller. The position switching mechanism for contacting and separating the doctor blade with respect to the roller and the rod are coupled so that the rod is rotated about the axis by the operation of the position switching mechanism. Characteristic doctor device.

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