KR102034433B1 - Apparatus for inserting of raw material - Google Patents

Abstract

The present invention relates to a raw material input device, hopper; A chute connected to the bottom of the hopper; An angle adjusting unit connected to the chute so as to adjust the rotation angle of the chute; And a driving unit connected to the angle adjusting unit and providing power for rotating the chute. The chute can easily adjust the rotation angle of the chute.

Description

Apparatus for inserting of raw material}

The present invention relates to a raw material input device, and more particularly to a raw material input device that can easily adjust the input position of the raw material.

In general, when the converter refining process is completed, ferroalloy is added while the molten steel in the converter is pulled out to the ladle. The molten steel is tapped into the ladle through the tapping hole by tilting the converter, and the ferroalloy is introduced into the ladle using an alloy chute provided on one side of the converter. At this time, the molten steel tapping through the tapping hole forms a molten steel, falls into the ladle and is charged, and when the alloy steel is introduced to the point where the molten steel falls, the quality abnormality due to the error rate and segregation of the iron can be suppressed.

However, if the converter is used for a long time, the refractory of the converter is eroded or worn out, and the tilt angle of the converter should be gradually increased during the tapping. As such, when the tilt angle of the converter increases, a phenomenon in which the falling point of the molten steel is also changed occurs. If the falling point of the molten steel is changed, the input position of the ferroalloy is also changed to match the falling point of the molten steel.

On the other hand, the ferroalloy chute is formed to be rotatable, and moves to the converter side when the ferroalloy is introduced, and can be avoided from the converter in the standby state in which the ferroalloy is not added. The rotation angle of the ferroalloy chute is preset according to the ferroalloy injection position, and in order to adjust the rotation angle of the ferroalloy chute, the ferroalloy chute and the driving shaft of the driver must be separated, and then the rotation angle of the ferroalloy chute is adjusted. However, since the ferroalloy chute and the drive shaft are connected by welding, in order to adjust the rotation angle of the ferroalloy chute, the connection between the ferroalloy chute and the drive shaft must be cut, and the welding angle must be adjusted after the ferroalloy chute is adjusted. do. This takes a lot of time to adjust the rotation angle of the ferroalloy chute, there is a problem that a safety accident may occur in a work environment that generates high heat and dust.

KR 2000-0039995 A KR 0453677 Y

The present invention provides a raw material input device that can easily adjust the input position of the raw material.

Raw material input device according to an embodiment of the present invention, the hopper; A chute connected to the bottom of the hopper; An angle adjusting unit connected to the chute so as to adjust the rotation angle of the chute; And a driving unit connected to the angle adjusting unit and providing power for rotating the chute.

The chute, the vertical portion in communication with the internal space of the hopper; An inclined portion connected to a lower portion of the vertical portion; And a flange provided on an upper portion of the vertical portion so as to extend in a direction crossing the vertical portion, wherein the angle adjuster may be connected to the flange.

The angle adjustment unit, the body is formed in a ring shape; And a plurality of angle adjusting members spaced apart along the circumferential direction of the body.

The angle adjusting member may include a through hole formed to penetrate the body in a vertical direction, or a protrusion formed to extend in at least one of an upper surface and a lower surface of the body.

The angle adjusting unit may be connected to the outside of the flange.

The inner circumferential surface of the body and the outer circumferential surface of the flange may form an uneven structure to be engaged with each other.

The drive unit, a driver for providing power and having a drive shaft; And a connection member for connecting the drive shaft and the angle adjustment member, wherein the connection member may be rotatably connected to the drive shaft.

The driver may be installed on a support installed on the ground, and may include a length adjusting member formed in a plate shape to be inserted into a connection portion of the driver and the support.

The length adjusting member may be provided in plurality, and the plurality of length adjusting members may be formed in different thicknesses.

The connecting member may be formed in a plate shape, and may have a first fastening hole for connecting to the angle adjusting member on one side and a second fastening hole for connecting with the drive shaft on the other side.

The connecting member may be provided in plural, and the plurality of connecting members may form different distances between the first fastening hole and the second fastening hole.

According to the embodiment of the present invention, the input position of the raw material can be easily adjusted. That is, the chute for injecting raw materials, such as ferroalloy, is provided with the angle adjusting part, and the rotation angle of a chute | shoot can be easily adjusted. The angle adjuster may be configured to connect to the driver at various points. Accordingly, the rotation angle of the chute can be changed by changing the connection position between the angle adjuster and the driver. At this time, the angle adjusting unit and the driver is configured to be detachable, it is possible to shorten the time required to separate and combine the angle adjusting unit and the driver for adjusting the rotation angle of the chute.

Through this, the angle adjustment time can be shortened to reduce the burden on the worker, and it is possible to suppress or prevent the occurrence of safety accidents in a work environment in which high heat and dust are generated. In addition, operation interruption or the like due to the adjustment of the rotation angle of the chute can be suppressed, and productivity can be prevented from being lowered.

1 shows a converter tapping operation.
2 is an exploded perspective view of a raw material input device according to an embodiment of the present invention.
3 is a perspective view of a raw material input device according to an embodiment of the present invention.
4 is a view showing a connection state of the chute and the angle adjusting unit in the raw material input device according to an embodiment of the present invention.
5 is a view showing a modified example of the angle adjusting unit and the connection state of the chute and the angle adjusting unit.
6 is a view showing another modified example of the angle adjusting unit.
7 shows a connecting member.
8 is a view showing a distance adjusting member.
9 is a view showing a state in which the distance adjusting unit is installed in the drive unit.
10 and 11 are views showing a state of use of the raw material input device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like numbers refer to like elements in the figures.

At least a part of the raw material input device according to the present invention is configured to be rotatable, and can be used to load various kinds of raw materials into a container while dropping. Hereinafter, the apparatus for injecting ferroalloy when tapping the molten steel in the ladle after the converter refining will be described as an example.

1 is a diagram showing a converter tapping operation.

Referring to FIG. 1, when the converter refining is completed, the converter 100 is tilted to one side where the tap hole 102 is formed, and the molten steel is tapped into the ladle 200 provided at one lower side of the converter 100. At this time, the molten steel discharged from the tapping hole 102 forms a molten steel flow and is charged into the ladle 200.

Then, while the molten steel is pulled out, the ferroalloy is introduced into the ladle 200 through the raw material input device, for example, the ferroalloy input device 300 provided on one side of the converter 100. The ferroalloy input device 300 includes a chute 320 rotatable through the power provided from the driving unit 330, and when the ferroalloy is injected, the chute 320 is rotated to the ladle 200, and the ferroalloy is introduced. In the idle state, the rotation may be avoided from the ladle 200. At this time, the chute 320 has a rotation angle is set in advance, if the falling point of the molten steel during the tapping should be adjusted by adjusting the rotation angle of the chute 320 should also change the injection position of ferroalloy.

Accordingly, the present invention provides a raw material input device that can easily adjust the rotation angle of the chute 320 in accordance with the change of the falling point of the molten steel.

2 is an exploded perspective view of a raw material input device according to an embodiment of the present invention, Figure 3 is a perspective view of a raw material input device according to an embodiment of the present invention, Figure 4 is a chute in the raw material input device according to an embodiment of the present invention And a view showing a connection state of the angle adjuster, FIG. 5 is a view showing a modified example of the angle adjuster and a connection state of the chute and the angle adjuster, FIG. 6 is a view showing another modified example of the angle adjuster, and FIG. 8 is a view showing a member, and FIG. 8 is a view showing a distance adjusting member, and FIG. 9 is a view showing a state in which a distance adjusting unit is installed in the driving unit.

2 and 3, the ferroalloy input device 300 according to the embodiment of the present invention includes a hopper 310, a chute 320 connected to a lower portion of the hopper 310, and a chute 320. It may include an angle adjuster 350 is connected to the chute 320 and the driver 330 is connected to the angle adjuster 350 to provide a power for rotating the chute 320 to adjust the rotation angle of the chute 320. In addition, as shown in FIG. 1, the ferroalloy input device 300 may include an ferroalloy supply device 400 for supplying ferroalloy to the ferroalloy input device 300.

The hopper 310 has a space formed therein, the upper and lower portions may be opened so that the ferroalloy supplied from the ferroalloy supply device 400 is introduced into the space and the ferroalloy is discharged to the chute 320. have. In addition, a first flange 312 for connecting to the chute 320 may be formed below the hopper 310.

The chute 320 is connected to the lower portion of the hopper 310, is connected to the vertical portion 322 disposed in the vertical direction, the lower portion of the vertical portion 322, the lower end toward the outside of the vertical portion 322 It may include an inclined portion 324 disposed to be inclined. At this time, the vertical portion 322 and the inclined portion 324 communicates with the space of the hopper 310, it can be used as a movement path of the ferroalloy accommodated in the hopper 310.

In addition, a second flange 326 may be provided on the upper portion of the vertical portion 322 so as to extend in a direction crossing the extending direction of the vertical portion 322, for example, in a horizontal direction. The second flange 326 is configured to connect with the first flange 312 provided in the hopper 310, and may be formed in a size similar to that of the first flange 312.

In addition, a plurality of connectors 312a and 326a may be formed in the first flange 312 and the second flange 326, respectively.

The hopper 310 and the chute 320 may be connected to each other by using the first fixing member 382 such as a bolt and a nut in a state where the first flange 312 and the second flange 326 overlap each other. For example, the bolts are inserted into the connectors 312a and 326a while the first flange 312 and the second flange 326 overlap each other, and the hopper 310 and the chute 320 are fastened by fastening nuts to the bolts in opposite directions. Can connect

The hopper 310 and the chute 320 may be connected to each other and rotate using power provided by the driving unit 330. In this case, the hopper 310 and the chute 320 may be rotatably supported by the first support 301. The first support 301 may be provided at a position higher than the ladle 200, for example, the work table 10, and the first support 301 may cover and support at least a portion of the outer circumferential surface of the vertical portion 322. At this time, the inclined portion 324 may be extended to the lower portion of the first support 301 may be exposed to the lower work platform (10).

When power is supplied from the driving unit 330 to the chute 320 through this configuration, the chute 320 may rotate using the vertical part 322 as the rotation axis, and the inclined part 324 may be the vertical part 322. Rotate with and rotates along the circumferential direction of the vertical portion 322, it can move to the ferroalloy input position or the standby position.

The angle adjusting unit 350 may be connected to the chute 320 to transmit the power provided by the driving unit 330 to the chute 320.

Referring to FIG. 4, the angle adjuster 350 may be connected to the second flange 326, and more specifically, may be connected to the outside of the second flange 326. At this time, the angle adjusting unit 350 is welded to the connection between the angle adjusting unit 350 and the second flange 326 in a state in which the second flange 326 is inserted therein and the second flange 326. Can connect

Alternatively, as shown in FIG. 5, after forming the plurality of protrusions 328 along the inner circumferential surface of the angle adjusting unit 350, and forming the plurality of grooves 356 along the outer circumferential surface of the second flange 326. The angle adjuster 350 and the second flange 326 may be coupled to the protrusion 328 and the groove 356 to be engaged with each other. At this time, the protruding portion 328 is formed in a trapezoidal shape in which the width direction becomes longer toward the bottom, and the groove portion 356 is formed in an inverted trapezoidal shape in which the width direction becomes shorter toward the lower portion, and the angle adjusting part 350 is formed. It may be supported in a form seated on the two flanges (326).

Herein, the protrusion 328 is formed in the angle adjusting part 350, and the groove 356 is formed in the second flange 326, but the groove may be formed in the angle adjusting part 350, or the second flange may be formed. Of course, a protrusion may be formed at 326. In addition, by forming a concave-convex structure of various forms that are engaged with the angle adjusting unit 350 and the second flange 326, it is possible to easily connect the angle adjusting unit 350 to the second flange 326 without welding or the like. .

Referring back to FIG. 3, the angle adjusting unit 350 may include a body 352 formed in a ring shape and a plurality of angle adjusting members spaced apart along the circumferential direction of the body 352. At this time, the angle adjusting member is configured to connect with the driving unit 330, it is provided with a plurality can change the connection position with the driving unit 330 in various ways.

The body 352 may be formed in a ring shape. The inner diameter of the body 352 may be formed to be the same size or the same size as the outer diameter of the second flange 326, it may be formed to have an outer diameter larger than the outer diameter of the second flange 326. The body 352 may be formed of a rigid metal material so as to transmit power transmitted from the driving unit 330 to the chute 320.

The angle adjusting member may be formed as a through hole 354a penetrating the body 352 in the vertical direction. The through holes 354a may be formed in plural along the circumferential direction of the body 352, and may be formed to be spaced apart from each other by a predetermined distance. For example, the through hole 354a may be formed to have a diameter of about 15 to 25 mm, and may have a space of about 30 to 40 mm. This is a numerical value for precisely adjusting the rotation angle of the chute 320 and may be variously changed according to a working environment.

In addition, the angle adjustment member may be formed in the shape of the projection 354b extending in the vertical direction on at least one of the upper surface and the lower surface of the body 352. The protrusion 354b may be spaced apart along the circumferential direction of the body 352 on the upper surface of the body 352 as shown in (a) of FIG. 6. In this case, the protrusion 354b may be formed to have a similar size and spacing to the through hole 354a. Alternatively, although not shown, the lower surface of the body 352 may be spaced apart along the circumferential direction of the body 352.

In addition, the protrusions 354b may be spaced apart along the circumferential direction of the body 352 on the upper and lower surfaces of the body 352 as shown in FIG. In this case, the upper and lower surfaces of the body 352 may be formed to be symmetrical with each other, and as shown in FIG. 6B, the upper and lower surfaces of the body 352 may be alternately formed. It may be. In this case, the protrusion 354b may be formed to have a larger interval than the protrusion 354b shown in FIG. 6A, and have a similar size and spacing to the protrusion 354b shown in FIG. 6A. It may be formed. In the latter case, since the protrusions 354b are formed to cross each other on the upper and lower surfaces of the body 352, the protrusions 354b may be connected to the driving unit 330 at more various positions, thereby further adjusting the angle of the chute 320. Can be.

As such, since the angle adjusting unit 350 includes a plurality of angle adjusting members, the angle of the chute 320 may be adjusted by changing the connection position with the driving unit 330 in various ways. This will be described again when the method of using the ferroalloy input device 300 will be described.

The driving unit 330 is provided at one side of the chute 320, provides power for rotating the chute 320, and includes a driver 332 having a driving shaft 334, a driving shaft 334, and an angle adjusting unit 350. It may include a connecting member 338 for connecting. In this case, the driving unit 330 may be connected to one side of the chute 320 or the second support 302 provided on one side of the first support 301.

As the driver 332, a cylinder or the like capable of linearly moving the driving shaft 334 may be used. The driver 332 may rotate the chute 320 in one direction or the other direction by reciprocating the drive shaft 334 between the driver 332 and the chute 320. One side of the driving shaft 334 may be connected to the driver 332 to be movable along the inside of the driver 332, and the other side thereof may be disposed to face the chute 320. The other end of the driving shaft 334 may be provided with a fastening portion 335 for connecting the angle adjusting portion 350 and the connecting member 338 for connecting the driving shaft 334 to each other. The fastening part 335 may be formed in an approximately 'c' shape so as to hold at least a portion of the connection member 338. In addition, the fastening part 335 may be formed with a first fastening hole 336 for connecting with the connection member 338 by using the second fixing member 384 such as a bolt or a nut.

The connection member 338 may be formed in a plate shape or bar shape having a thickness, a length, and a width. One side of the connection member 338 may be formed with a second fastening hole 338a for connecting with the fastening part 335, and the other side with a third fastening hole 338b for connecting with the angle adjusting part 350. Can be. At this time, the drive shaft 334 is a linear motion by the operation of the driver 332, but the chute 320 is a rotary motion by the linear motion of the drive shaft 334. In order to connect the fastening part 335 and the connection member 338 to be rotatable, the second fastening hole 338a may be formed as one. In addition, at least two third fastening holes 338b for connecting the connection member 338 and the angle adjuster 350 may be formed in order to stably transfer the power provided from the driver 332 to the chute 320. have.

The connecting member 338 and the driving shaft 334 may be rotatably connected by inserting the second fixing member 384 into the first fastening hole 336 and the second fastening hole 338a.

The connecting member 338 and the angle adjusting unit 350 may be connected in different ways depending on the shape of the angle adjusting member. When the angle adjusting member is formed as the through hole 354a, the third fixing member 386 may be inserted into the through hole 354a and the third fastening hole 338b. In this case, the third fixing member 386 may include a bolt and a nut.

In addition, when the angle adjusting member is formed in the shape of the projection 354b, the projection 354b is inserted into the third fastening hole 338b, and the third fixing member 386 such as a nut is connected to the projection 354b. The angle adjusting unit 350 and the connecting member 338 may be connected to each other.

Through this configuration, the driver 332 is operated to reciprocate the drive shaft 334 between the driver 332 and the chute 320, for example, to move forward or retreat from the chute 320 side or the connecting member 338. ) And the connection portion between the fastening portion 335 can be bent to rotate the chute 320 stably.

On the other hand, the moving distance of the drive shaft 334 is set constant. When the connection position between the drive shaft 334 and the angle adjuster 350 is changed, the position of the driver 332 is changed to change the position of the drive shaft 334 generated by the change of the connection position between the drive shaft 334 and the angle adjuster 350. You need to compensate for the distance traveled. Accordingly, in the present invention, a plurality of connection members 338 may be provided to compensate for the moving distance of the driving shaft 334. In this case, as shown in FIG. 7, the plurality of connection members 338 may be formed differently with distances L0 and L1 of the second fastening holes 338a and the third fastening holes 338b, respectively. That is, as the angle adjusting member connected to the driving shaft 334 in the angle adjusting unit 350 is farther from the driving shaft 334, the connecting member having a longer distance between the second fastening hole 338a and the third fastening hole 338b. The angle adjuster 350 and the driving shaft 334 may be connected using the reference numeral 338.

Alternatively, the length adjusting member 360 may be inserted into a connection portion between the driver 332 and the second support 302 to compensate for the moving distance of the driving shaft 334.

That is, the first support member 302a is formed in the second support 302 to connect the driver 332, and the second support member 302 is connected to the first support member 302a in the driver 332. 332a) is formed. In addition, the driver 332 may be connected to the second support 302 by connecting the first support member 302a and the second support member 332a using the fourth fixing member 388. At this time, when the length adjusting member 360 is inserted between the first supporting member 302a and the second supporting member 332a, the driving shaft 334 generated according to the connection position change between the driving shaft 334 and the angle adjusting unit 350. It is necessary to compensate the travel distance of).

Referring to FIG. 8A, the length adjusting member 360 may be formed in a plate shape, and a slit 362 into which the fourth fixing member 388 may be inserted may be formed. At this time, the slit 362 facilitates the installation of the length adjustment member 360, there is an effect that can prevent the departure during use.

And the length adjusting member 360 may be provided in plural to have a variety of thickness (t0, t1, t2 ..). Accordingly, the movement distance of the drive shaft 334 generated according to the change in the connection position between the drive shaft 334 and the angle adjusting unit 350 can be compensated accurately.

9 (a) shows a state before the length adjusting member 360 is installed at the connection portion between the driver 332 and the second support 302, and (b) of FIG. The zero length adjustment member 360 is installed between the connection portion of the second support 302, that is, between the first support member 302a and the second support member 332a. When the length adjusting member 360 is installed between the first supporting member 302a and the second supporting member 332a, the driver 332 is moved toward the chute 320 by 't' than before the length adjusting member 360 is installed. The effect can be shifted by. For example, when the connection position between the drive shaft 334 and the angle adjuster 350 is moved by 't' toward the converter 100 to adjust the rotation angle of the chute 320, the at least one length adjusting member 360 is moved. 332 and the second support 302 may be installed to compensate for the movement distance of the drive shaft 334 generated by the change of the connection position between the drive shaft 334 and the angle adjuster 350.

Hereinafter, a method of using the ferroalloy input device according to an embodiment of the present invention will be described.

10 and 11 are views showing a state of use of the raw material input device according to an embodiment of the present invention. 10 shows a state of use before adjusting the angle of the chute, and FIG. 11 shows a state of use after adjusting the angle of the chute.

Referring to FIG. 10A, when the inclined portion 324 of the chute 320 is stopped at an intermediate point in the rotation range of the chute 320, the connection position between the angle adjuster 350 and the drive shaft 334 is It is biased toward the driver 332 side.

In this state, as shown in FIG. 10B, when the driver 332 is operated to move the driving shaft 334 toward the chute 320, the inclined portion 324 of the chute 320 moves toward the converter 100. rotated by a '.

Subsequently, if the falling point of the molten steel is changed when the converter is pulled out, and the rotation angle of the chute 320 needs to be adjusted, the driving shaft 334 is separated from the angle adjusting unit 350, and then the driving shaft ( 334 may be reconnected. At this time, when the number of times of use of the converter is large, the refractory is worn or melted, the falling angle of the molten steel flows away from the chute 320 side while increasing the tilt angle of the converter 100 for tapping. In this case, as illustrated in FIG. 11A, the angle of the inclined portion 324 of the chute 320 may be adjusted. For example, when the rotation angle of the chute 320 needs to be adjusted by 'b', the drive shaft 334 and the angle adjuster 350 may be connected after the chute 320 is rotated by 'b'. At this time, the position where the drive shaft 334 is connected to the angle adjusting unit 350 may be the same position as before the rotation angle is adjusted, or may be a different position than before the rotation angle is adjusted.

After adjusting the rotation angle of the chute 320, before the rotation angle is adjusted, the connecting position of the drive shaft 334 and the angle adjuster 350 is from the driver 332 side than before the chute 320 is adjusted. Away.

In this case, the driving shaft 334 may be connected to any one of the plurality of through holes 354a formed in the angle adjusting unit 350, for example, the through hole 354a disposed at a position corresponding to the length of the driving shaft 334. . In this case, the through hole 354a connected to the drive shaft 334 in the angle adjusting unit 350 may be a through hole 354a different from before the rotation angle adjustment.

Alternatively, when the driving shaft 334 is connected to the through hole 354a disposed at the same position as before the rotation angle adjustment, the distance adjusting member 360 is inserted into the connection portion between the driver 332 and the second support 302. In addition, the moving distance of the driving shaft 334 generated by the change of the connection position between the driving shaft 334 and the angle adjusting unit 350 may be compensated. Alternatively, by moving the connecting member 338 connecting the drive shaft 334 and the angle adjuster 350 to a longer one, the movement of the drive shaft 334 caused by the change of the connection position between the drive shaft 334 and the angle adjuster 350 is performed. It can also compensate for distance.

Subsequently, when the driver 332 is operated to inject ferroalloy into the ladle 200 when the converter is pulled out, the drive shaft 334 moves toward the chute 320 to rotate the chute 320. As the chute 320 rotates, the inclined portion 324 rotates by 'a' corresponding to the moving distance of the driving shaft 334, that is, the set distance.

Accordingly, after adjusting the angle of the chute 320, as shown in (b) of FIG. 11, the rotational angle adjustment portion 'b' is further rotated so that the inclined portion 324 of the chute 320 is converted to the converter 100. Or move closer to the ladle 200 side.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the technical spirit of the following claims.

100: converter 200: ladle
300: ferroalloy input device 310: hopper
320: chute 330: drive unit
350: angle adjusting unit 360: length adjusting member

Claims (11)

Hopper;
A chute connected to the bottom of the hopper;
An angle adjusting unit connected to the chute so as to adjust the rotation angle of the chute; And
A driving unit connected to the angle adjusting unit and providing power for rotating the chute;
Including,
The angle adjusting unit,
A body formed in a ring shape; And
Raw material input device comprising a; a plurality of angle adjustment members are provided spaced along the circumferential direction of the body. The method according to claim 1,
The suit,
A vertical portion communicating with an internal space of the hopper;
An inclined portion connected to a lower portion of the vertical portion; And
And a flange provided on an upper portion of the vertical portion so as to extend in a direction crossing the vertical portion.
The angle adjusting unit is a raw material input device connected to the flange. delete The method according to claim 2,
The angle adjusting member,
Raw material input device comprising a through-hole formed to penetrate the body in the vertical direction or a protrusion formed to extend in at least one of the upper surface and the lower surface of the body. The method according to claim 4,
The angle adjusting unit is a raw material input device connected to the outside of the flange. The method according to claim 4,
Raw material input device to form a concave-convex structure that is engaged with the inner peripheral surface of the body and the outer peripheral surface of the flange. The method according to claim 5 or 6,
The drive unit,
A driver providing power and having a drive shaft;
And a connecting member for connecting the drive shaft and the angle adjusting member.
The connecting member is a raw material input device for connecting rotatably with the drive shaft. The method according to claim 7,
The driver,
Installed on the support that is installed on the ground,
Raw material input device comprising a length adjusting member formed in a plate shape to be inserted into the connection portion of the driver and the support. The method according to claim 8,
The length adjusting member is provided in plurality,
The plurality of length adjusting member is a raw material input device to form a different thickness. The method according to claim 7,
The connecting member,
It is formed in a plate shape, the raw material input device for forming a first fastening hole for connecting to the angle adjusting member on one side, and a second fastening hole for connecting to the drive shaft on the other side. The method according to claim 10,
The connecting member is provided in plurality,
The plurality of connection members is a raw material input device to form a different distance between the first fastening hole and the second fastening hole.

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