KR101906861B1 - Apparatus for manufacturing overhead wires supporter - Google Patents

Abstract

Disclosed is an apparatus for manufacturing an overhead ground wire supporter. According to embodiments of the present invention, the apparatus for manufacturing an overhead ground wire supporter enables a support member for coupling a tool to be automatically coupled to the inside of an upper end of an overhead ground wire body in order to automate a portion of a post-process performed by existing workers to improve productivity and improve uniformity of a quality.

Description

[0001] APPARATUS FOR MANUFACTURING OVERHEAD WIRES SUPPORTER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for manufacturing a working ground wire support which is fixed to an upper portion of a pole installed on a power distribution line and used to support a ground wire for a distribution line.

Generally, in all distribution lines, a branch line is installed to prevent breakdown by lightning. What is required for the facilities of the branch line is the branch line support. The ground support line is connected to the upper end of the pole to support the ground line for the distribution line so that the ground line is connected to the ground by connecting all the poles. This contributes to the reliability improvement of the power supply by minimizing the failure of the power line during the lightning stroke.

It is installed in the upper part of the electric pole and has the tension and hardness higher than a certain level because it supports the ground wire. It has a cylindrical shape so as to facilitate installation on the pole. More specifically, the lower part of the processed branch support is provided with a funnel shape for facilitating insertion into the pole, and the upper part of the processed branch support is generally provided with a cylindrical shape.

In manufacturing a conventional ground support line, the upper and lower portions of the ground support line are made separately from each other and then welded to each other, taking into account the difference in shape between the upper and lower portions of the ground support line. However, such a work has a problem that the manufacturing process becomes excessively complicated and it is difficult to uniformly maintain the quality of the product. A production process was then introduced to cut and process a single sheet of material to produce an integrated ground support. For example, the method disclosed in Korean Patent No. 10-0607588.

On the other hand, the ground wire support base has a shape in which the upper and lower portions are opened. This is because a bracket for supporting the ground wire should be connected to the upper part of the ground wire support and the upper end of the pole should be inserted into the lower part of the support wire support. Further, a handle member is welded to the side portion for facilitating the transportation of the ground wire support. Accordingly, even if the body of the ground wire support is formed by cutting and machining a single plate material, many post-processes such as fastening of a fixing band for welding with a pole and welding of a handle member are required, .

At present, the above-mentioned post-processing is performed by manpower, so that the production time is relatively long and the quality of the product is difficult to maintain uniformly. This is why many attempts have been made to automate the finishing work of the ground support.

Korean Registered Patent No. 10-0607588 (Registered on July 25, 2006)

SUMMARY OF THE INVENTION The present invention is directed to an apparatus for manufacturing a working ground support, comprising a support member automatic welder for manufacturing a ground support stand, wherein the support member for automatically joining the support to the ground support stand.

According to an aspect of the present invention, there is provided a power transmission device comprising: a body fixed to an upper portion of a pole installed on a power distribution line to support a ground wire for a power distribution line, the upper and lower portions being open, a support member coupled to an inside of an upper end of the body, And a cut portion formed in a longitudinal direction on a lower side portion of the body, the apparatus comprising: a blasting press for cutting a plate material to form a flat deployed shape of the ground support line; A U-banding hydraulic press for shaping a semi-finished product of the deployed shape so as to have a U-shape in section, an O-banding power press for shaping a semi-finished product obtained through a U-banding hydraulic press so as to form an O- A welding device for forming an outer shape of the branch support, and a supporting member automatic welder for engaging the supporting member inside the upper end of the body And the automatic welding machine includes a mounting part for mounting the body of the ground support wire so as to be inclined and a blade inserted into the cut part to support the body from below, A position alignment unit for monitoring the welding line at the side of the body and controlling the rotation unit such that the welding line is positioned at the correct position when the welding line is not in a correct position; A pressing portion which is disposed so as to be capable of pressing the side portion and which secures a space for inserting the supporting member into the upper opening portion by pressing the upper side portion of the body to elastically deform the upper opening portion of the body; And then welding both side portions of the support member to the inside of the body It may be provided with a processing device including the branch support prepared.

In this case, the rotating unit may include a receiving unit disposed on the bottom surface, a driving unit coupled to the receiving unit so as to be adjustable in inclination angle, a rotating member rotated by the driving unit, and a plurality of blades coupled to the rotating unit can do.

The jig for supporting member for inserting the supporting member into the upper opening of the body may further include a plate and a plurality of protrusions protruding from the center of the plate and fixing the supporting member And a support member fixing portion that is formed.

According to embodiments of the present invention, by automatically joining a support member for engaging a metal to the inside of the upper end of the ground wire body, a part of the post-machining process performed by the existing workforce is automated, Can be increased.

Fig. 1 is a view schematically showing a ground support line.
2 is a conceptual diagram schematically showing a part of a process for manufacturing a ground wire support according to one embodiment of the present invention.
3 is a view schematically showing a supporting member automatic welder in an apparatus for manufacturing ground wire support according to an embodiment of the present invention.
FIG. 4 is a view showing a front view of the automatic welding machine of the supporting member of FIG. 3. FIG.
5 is a view sequentially showing a state in which a supporting member is inserted into the body of the ground support line by the automatic welding machine of the supporting member of Fig.
Fig. 6 is a schematic view of a support member jig for insertion of the support member of Fig. 5;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the following description is illustrative of the present invention, and the technical spirit of the present invention is not limited to the following description. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In addition, thickness, size, etc. of each member in the drawings may be exaggerated, omitted, or schematically shown for convenience of explanation.

In the description of the structure of the present invention described herein, the positional relationship or direction is based on the drawings attached hereto unless otherwise stated.

In the description of the structure of the present invention described in the present specification, the description of the space and the description of the positional relationship mean the relative positions between the elements constituting the present invention. Also, unless otherwise stated, there may be other components in the space between one component and another. For example, when reference is made herein to the presence of "on top" or "on top" of one component, it is to be understood that not only is there a case where another component is located directly on top of one component, Until the element and another element are located between the other elements.

Fig. 1 is a view schematically showing the ground wire support 10.

Referring to Fig. 1, the ground wire support 10 may be inserted into the pole top. The ground support stand 10 includes a standing body 11. As shown in FIG. 1, the body 11 has an entirely hollow cylindrical shape, and may have a shape in which the diameter decreases from the lower portion to the upper portion. The body 11 is formed of a metal. The body 11 can be formed by press-working and welding a metal sheet material having an outline shape of the ground wire support base 10, as will be described later. Thus, a welding line 11a is formed on one side of the body 11 in the vertical direction. At the lower end of the body 11, a cutout 14 is formed in the longitudinal direction. The incision part 14 forms a space when the upper end of the electric pole is inserted into the lower end of the body 11 and guides a metal fitting coupled to the side of the electric pole. The fixing band portion 15 may be disposed along the outer diameter of the lower end of the body 11 so as to bind the body 11 to the upper end of the electric pole. At the upper end of the body (11), a metal fitting (13) is provided. A plurality of clamp holes (not shown) are drilled in the metal fitting 13, and the ground wire is connected or seated through the clamp holes.

A support member 12 is provided inside the upper end of the body 11 to mount the metal fitting 13. The supporting member 12 is formed of a metal plate having a predetermined thickness and at least one fastening hole 12a for mounting the metallic fitting 13 is provided on the surface. Both side portions of the support member 12 are welded to the inside of the upper end of the body 11. Reference numeral 12b in Fig. 1 indicates a welding portion inside the support member 12 and the body 11.

The present invention relates to a manufacturing apparatus for manufacturing the above-mentioned ground support rods (10).

2 is a conceptual diagram schematically showing a part of a process for manufacturing a ground wire support according to one embodiment of the present invention.

Referring to FIG. 2, the apparatus for manufacturing a ground support support includes a blasting press 110, a U-bending hydraulic press 120, an O-bending hydraulic press 130, and a welding apparatus 140.

The blasting press 110 press-molds a metal plate, which is a raw material, into a semi-finished product 10a in the shape of an exploded view having an outer shape of the ground support stand 10. That is, the metal plate is cut to form a flat deployed shape of the ground support stand 10. A blasting mold corresponding to the contour of the ground support stand 10 is built in the blasting press 110.

The U-bending hydraulic press 120 forms the U-shaped semi-finished product 10b by shaping the semi-finished product 10a having a developed shape passing through the blaking press 110 to have a U-shaped cross section. The U-bending hydraulic press 120 includes a pressing portion (not shown) for pressing the central portion of the semi-finished product 10a downward and another pressing portion (not shown) for pressing both sides of the semi-finished product 10a upward The semi-finished product 10a is formed into the U-shaped semi-finished product 10b.

O-bending hydraulic press 130 forms the U-shaped semi-finished product 10b through the U-bending hydraulic press 120 so as to have an O-shaped cross section to form the O-shaped semi-finished product 10c. At this time, the O-shaped semi-finished product 10c is positioned so as to be close to both side portions. O-shaped hydraulic press 130 has an O-shaped pipe (not shown) for receiving the U-shaped semi-finished product 10b. After the U-shaped semi-finished product 10b is mounted on the pipe, Thereby forming a semi-finished product 10c.

The welding apparatus 140 welds the side joint surfaces of the O-shaped semi-finished product 10c to form the body 11 of the ground wire support 10. The welding apparatus 140 includes a jig (not shown) for mounting the O-shaped semi-finished product 10c and a robot welder for welding the joint surfaces of both side portions of the O-shaped semi-finished product 10c by the pre-

The braking press 110, the U-banding hydraulic press 120, the O-banding hydraulic press 130 and the welding apparatus 140 described above can be formed in the same or similar construction as that disclosed in Korean Patent No. 10-0607588 Therefore, detailed description will be omitted. The O-shaped semi-finished product 10c having passed through the welding device 140 constitutes the body 11 of the ground wire support 10 shown in Fig.

FIG. 3 is a schematic view of a support member automatic welder 150 in the apparatus for manufacturing a ground support wire according to an embodiment of the present invention. FIG. 4 is a front view of the support member automatic welder 150 of FIG. Fig.

3 and 4, the apparatus for manufacturing a ground support wire support according to the present invention further includes a support member automatic welder 150 for automatically performing post-processing of the O-shaped semi-finished product 10c formed through the welding apparatus 140 do. The supporting member automatic welding machine 150 automatically welds the supporting member 12 for mounting the antirrus metal 13 (see FIG. 1) to the inside of the upper end of the body 11 of the ground wire support 10. Therefore, it is possible to automate a part of the post-processing of the processed wire support which has been performed by the existing manpower, thereby improving the productivity and improving the uniformity of the quality. Hereinafter, the supporting member automatic welding machine 150 will be described in detail.

The supporting member automatic welding machine 150 includes a mounting portion 151, a rotation portion 152, a positioning portion 153, a pressing portion 154, and a welding portion 155.

The mounting portion 151 mounts the body of the ground support stand 10 so as to be inclined. The mounting portion 151 includes an upper mounting portion 1511, a middle mounting portion 1512, and a connecting portion 1513. The upper holder 1511 may be a U-shaped band member having an inner diameter corresponding to the outer diameter of the upper portion of the body. The middle holder 1512 is a U-shaped band member having an inner diameter corresponding to the outer diameter of the central portion of the body. Here, the central part of the body refers to the central part when divided into three equal parts based on the length of the body. The upper holder 1511 and the middle holder 1512 are arranged at a predetermined angle inclination. Therefore, the ground support line 10 mounted on the upper mounting table 1511 and the middle mounting table 1512 can also be arranged in an inclined manner. The connecting rod 1513 is formed in the form of a pair of bars, and both ends thereof are engaged with the side portions of the upper holder 1511 and the middle holder 1512, respectively. Also, although not shown in the drawings, the linkage 1513 can be supported from below by a support (not shown) formed in one or more bar shapes.

The rotary part 152 supports the lower end of the body of the ground wire support 10 and also rotates the body. The rotating portion 152 includes a blade 1521, a rotating member 1522, a driving portion 1523, and a receiving portion 1524. In one embodiment, the blades 1521 are inserted into a cutout 14 formed in a pair and longitudinally formed at the lower body side of the work ground support 10. In FIG. 3, a pair of cutouts 14 are formed on the ground support line 10 so as to face each other. However, the number of the cutouts 14 may be larger. For example, a cutout 14 may be formed at each of the three positions to divide the body bottom diameter of the ground support stand 10 (i.e., three cutouts) or a cutout 14 may be respectively formed (i.e., four cuts). At this time, the blade 1521 may be configured to correspond to the number of the cutouts 14, and each blade 1521 may be inserted into each cutout 14, respectively. The rotating member 1522 is a member to which an end of the blade 1521 is coupled. A rotating shaft (not illustrated) is provided at the center of the rotating member 1522, and the rotating shaft is connected to the driving unit 1523. The driving unit 1523 may be a conventional electric motor or the like. As the driving unit 1523 is driven, the rotary member 1522 is rotated clockwise or counterclockwise with respect to the rotary shaft, and accordingly, the blade 1521 is also rotated. Each blade 1521 is inserted into the cutout portion 14 formed in the body of the ground wire support 10 so that the body of the ground wire support 10 can be rotated as the blade 1521 rotates. The support portion 1524 is a member for supporting the driving portion 1523 on the ground and includes a vertical portion (unrepresented) and a vertical support portion (not shown) . ≪ / RTI > At this time, the vertical pieces are hinged to both sides of the driving unit 1523, so that the angle of the driving unit 1523 can be adjusted in a tilting manner with respect to the ground. In summary, the rotary part 152 is inserted into the cutout 14 of the ground support 10 to support the lower part of the ground support 10. Further, the body of the ground wire support 10 can be rotated in accordance with the rotation of the blade 1521.

The position alignment unit 153 monitors the welding line 11a (see Fig. 1) of the body side of the ground wire support 10. When the welding line 11a is not in the correct position, the welding unit 11a controls the rotating unit 152 so that the welding line 11a is positioned at the correct position. The position alignment unit 153 includes a CCD camera disposed so that the lens faces the body side of the ground support stand 10, a signal conversion unit that receives the image signal of the CCD camera and converts the image signal into a digital signal, An extraction unit for analyzing the digital image signal and extracting the welding line 11a, and a control unit for transmitting a control signal to the rotation unit 152 according to the extraction result of the extraction unit. Each of the detailed arrangements constituting the position alignment unit 153 may be configured to be capable of wireless or wired communication and the positioning unit 153 and the driving unit 1523 of the rotation unit 152 may be configured to be capable of wireless or wired communication. The CCD camera photographs the body side of the ground support stand 10 in real time. The signal conversion unit receives the image signal of the CCD camera and converts it into a digital signal. The extracting unit analyzes the digital image signal converted by the signal converting unit and extracts the welding line 11a. In one embodiment, the extracting section can extract the welding line 11a by using a color image processing method. For example, a welding line 11a is formed in a vertical direction at one side of the body of the ground support stand 10, wherein the color of the welding line 11a is slightly different from the color of the body of the ground support stand 10 . In the welding process, the passive film is destroyed by high temperature and is resistant to oxidation, and the color is oxidized in the region of the welding line 11a. Therefore, the extraction unit can extract the welding line 11a in such a manner that a digital image signal is subjected to image processing and a portion having a color largely different from that of the surroundings in the original image is separated. On the other hand, the welding line 11a is in the right position, which means that the welding line 11a is located so as to face the lens of the CCD camera. More specifically, since the welding line 11a is located only on one side of the ground support line 10 and the CCD camera of the alignment unit 153 is fixedly disposed to face the side of the ground support 10, 10, the welding line 11a may or may not be observed in the CCD camera. The position alignment unit 153 can determine that the welding line 11a is not in the correct position when the welding line 11a is not observed in the CCD camera, that is, when the welding line 11a is not extracted in the extracting unit . In this case, the control unit of the position alignment unit 153 transmits the predetermined control signal to the driving unit of the rotation unit 152. The rotary part 152 that receives the control signal rotates the rotary member 1522 in a clockwise or counterclockwise direction and rotates the blades 1521 coupled to the rotary member 1522 such that the blades 1521 are rotated, Is rotated. The welding line 11a is observed in the CCD camera of the position aligning unit 153 and the welding line 11a can be extracted in the extracting unit. Accordingly, the position alignment unit 153 determines that the welding line 11a is in the correct position, and the control unit can stop the rotation of the ground support stand 10 by transmitting a control signal for stopping the rotation of the rotation unit 152. That is, regardless of the manner in which the ground wire support bracket 10 is mounted to the mounting portion 151, the welding wire 11a always contacts the CCD camera lens of the positioning portion 153 through the above- As shown in FIG.

The reason for always aligning the welding line 11a as described above is to more easily engage and weld the support member 12 (see FIG. 1) to the inside of the upper body of the work ground support 10. The support member 12 is formed of a metal plate as described above and both side portions of the support member 12 are welded to the inside of the upper end of the body of the ground wire support 10. At this time, Since the line is coupled perpendicularly to the imaginary line connecting the center of the weld line 11a and the center line of the ground support 10. That is, since the arrangement of the support member 12 is determined on the basis of the welding line 11a, the welding line 11a of the ground support stand 10 is always positioned at the right position through the alignment unit 153 and the rotation unit 152 Lt; / RTI >

The pressing portion 154 presses and releases the upper end side of the body of the ground wire support 10. The pressing portion 154 may include a hydraulic rod 1541, a hydraulic driving portion 1542, and a fixing table 1543. 5 is a view sequentially showing a state in which the supporting member 12 is inserted into the body 11 of the ground support line 10 by the automatic welding machine 150 of the supporting member of Fig.

3 and 5, the pressing portion 154 elastically deforms the upper end opening of the body 10 by pressing the upper end side of the body 11 of the ground wire support 10, (11). The pressing portion 153 is disposed such that the hydraulic rod 1541 faces the upper end side of the body of the ground wire support 10. The fixed table 1543 is connected to the upper table 1511 to fix the hydraulic driving unit 1542 to the upper portion of the ground support table 10 and the hydraulic load 1541 is moved downward by the hydraulic pressure generated from the hydraulic driving unit 1542 So as to press the upper end side of the body 11 of the processed branch support 10. The hydraulic rod 1541 and the hydraulic drive unit 1542 may utilize a hydraulic piston apparatus that is conventionally used in the field of machinery.

The operation of the pressing portion 154 and the insertion of the supporting member 12 will be described in more detail. The ground support stand 10 is aligned such that the welding line 11b of the ground support stand 10 always faces upward. This can be accomplished by the positioning unit 153 and the rotation unit 152 described above. The pressing portion 154 generates hydraulic pressure from the hydraulic driving portion 1542 so that the hydraulic rod 1541 falls and presses the upper side portion of the ground support stand 10. The ground wire support 10 causes elastic deformation by the above pressing (see Fig. 5A). Since the ground support stand 10 is formed of metal, when a force less than the elastic limit is applied, elastic deformation can be caused by the pressing force. At this time, since the lower portion of the ground support line 10 is supported by the mounting portion 151, when the pressing portion 154 presses upward, the cross section of the ground support line 10 is deformed from the circular shape to the elliptical shape to a predetermined degree . At this time, the length and the width of the support member 12 are formed so as to correspond to the space when the cross section of the ground support stand 10 causes elastic deformation (more specifically, the support member 12 is smaller than the space) , And can be inserted into the upper end of the ground wire support frame 10 only when the cross section of the ground wire support bracket 10 is elastically deformed by the pressing portion 154 (refer to Fig. 5B). Therefore, after the support member 12 is elastically deformed in the cross section of the ground wire support bracket 10 through the pressurizing portion 154 to manually or automatically insert the support member 12 in an interference fit manner, the pressurization of the pressurizing portion 154 is released, The support member 12 can be firmly fixed by the inner surface of the ground support post 10 while the branch support 10 is restored. The support member 12 can be fully engaged with the inner side surface of the ground support stand 10 by welding the inner side joint portions of the support member 12 and the ground wire support 10 with each other.

Finally, the welded portion 155 welds the inner joint portion of the support member 12 and the ground wire support 10 after the pressing portion 154 is released (see Fig. 5C) as described above. The welding portion 155 may be a conventional robot welding machine, and a detailed description thereof will be omitted.

As described above, according to the embodiments of the present invention, the apparatus for manufacturing the ground support line support automatically joins the support member for engaging the metal to the inside of the upper end of the ground wire body, thereby automating a part of the post- It is possible to improve the productivity and increase the uniformity of the quality.

Fig. 6 is a schematic view of a support member jig for insertion of the support member of Fig. 5;

Referring to FIG. 6, when the support member 12 is inserted into the upper end of the ground support line 10, a manual or automatic method can be used. At this time, a supporting member jig can be employed for easier insertion of the supporting member 12. [ In one embodiment, the support member jig includes a plate 1611 and a support member fixing portion 1612 and a projection 1613 as shown in Fig. The plate 1611, the support member fixing portion 1612, and the protrusion 1613 may be integrally formed. The plate 1611 is formed in the shape of a metal plate and has a length larger than the upper diameter of the ground support post 10. The support member fixing portion 1612 is formed at a central portion of the plate 1611 so as to protrude to a predetermined extent, and temporarily supports the support member 12. The support member fixing portion 1612 may be formed to have a length smaller than the length of the support member 12 by a predetermined length. As described above, the supporting member 12 is provided with at least one fastening hole for mounting the metallic fitting, and the supporting member fixing portion 1612 is provided with the protrusion 1613 so as to correspond to the position and number of the fastening hole. The use of the support member jig will be described. After the support member jig is provided as shown in Fig. 6A, the support member 12 is mounted on the support member fixing portion 1612 of the support member jig. At this time, the protrusion 1613 formed in the support member fixing portion 1612 is inserted into the fastening hole of the support member 12, so that the support member 12 can be stably mounted on the support member jig. Next, as described above, when the upper end of the ground support line 10 is elastically deformed by the pressing portion 154, the direction of the support member 12 is aligned and the support member 12 is moved downward The upper end of the ground support stand 10 is pressed after the upper and lower inverting. In this case, since the length of the plate 1611 of the support member jig is larger than the diameter of the upper end of the ground support line 10 and the support member fixing portion 1612 is formed to have a length smaller than the length of the support member 12 , Both sides of the plate 1611 are blocked by the upper end of the ground support line 10 and are not further advanced and the support member fixing portion 1612 is inserted into the upper end of the ground support line 10, And it can be forced into the upper end of the branch support 10. A handle (not shown), which can be held by an operator, is formed on the back surface of the support member jig thus formed, or a coupling portion capable of engaging with a robot arm or the like can be formed. Therefore, the worker can directly grasp the support member jig by hand and can hold the support member 12 against the upper end of the ground support stand 10, or can use the robotic arm or the like to press it down. In the latter case, it is needless to say that the joining process of the support member 12 can be automated.

The technical idea of the present invention has been described above concretely. However, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. It will be understood that various modifications may be made in the invention, and that such modifications are also included within the scope of the present invention.

10: Welding line support 11a: Welding line
12: support member 110: blaking press
120: U Bending Hydraulic Press 130: O Bending Hydraulic Press
140: welding apparatus 150: supporting member automatic welding machine
151: mounting part 152:
153: Position alignment part 154:
155:

Claims (3)

A support member fixed to an upper part of a pole provided on the power distribution line to support a ground wire for a power distribution line, the support member being coupled to the inside of the upper end of the body, And an incision portion formed in the support member,
A blasting press for cutting the plate material to form a flat deployed shape of the ground support line,
A U-bending hydraulic press for shaping a semi-finished product of a spreading shape having passed through a blasting press so as to form a U-
A U-banding power press for shaping a semi-finished product having a U-banding hydraulic press to form an O-shaped section,
A welding device for welding the joint surfaces of the side portions to form the contour of the ground wire support,
And a support member automatic welder for coupling the support member to the inside of the upper end of the body,
The supporting member automatic welding machine includes:
A mounting part for mounting the body of the ground support line so as to be inclined,
A rotation part inserted into the incision part and including a blade for supporting the body from below, the rotation part being arranged to rotate the body by rotating the blade,
A position alignment unit for monitoring a welding line on the body side and controlling the rotation unit such that the welding line is in a correct position when the welding line is not in a correct position,
A pressing portion disposed to be capable of pressing an upper end portion of the body and to secure a space for inserting the support member into the upper opening portion by elastically deforming the upper end opening portion of the body by pressing the upper end side portion of the body,
And a welding portion for welding both side portions of the support member to the inside of the body after the support member is inserted into the upper open portion of the body. The method according to claim 1,
The rotation unit includes:
And a plurality of blades coupled to the rotary member, wherein the rotary member is rotated by the driving unit, and the plurality of blades are coupled to the rotary member. The method according to claim 1 or 2,
Further comprising: a support jig for inserting the support member into the upper opening of the body,
The jig for the support member,
And a support member fixing part protruding from a central portion of the plate and having a plurality of protrusions for fixing the support member.

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