KR101914679B1 - Steel pipe strut with connection member - Google Patents

Abstract

The present invention relates to a hollow steel pipe having a length longer than a width thereof; And an engaging member which is engaged with both side ends of the steel pipe and used for joining with other adjacent members, wherein the engaging member which is engaged with one end of the engaging members, which are respectively engaged with both side ends of the steel pipe, A plurality of flanges inserted into and coupled to a plurality of cutout grooves formed along a circumferential direction of the steel pipe; And a connecting plate coupled to an outer end of the plurality of flanges, wherein the connecting plate has a plurality of engaging holes for engaging with the adjacent other members. .
The present invention can provide a steel pipe having a hollow pipe having a length longer than the width and an engaging member that is engaged with both ends of the steel pipe. The steel pipe of the present invention has excellent bonding strength, stably supports the axial load, And is easily combined with various other members such as struts, jacks, wales, sidewalls, intermediate piles and the like, and the steel pipe and the coupling member are integrally joined together, so that they are easily stored and transported, It is possible to provide an effect without loss of concern.

Description

Technical Field [0001] The present invention relates to a steel pipe strut with a connection member,

The present embodiment relates to a steel pipe strut with a joining member. The present invention relates to a steel pipe strut which supports earth pressure by installing earth retaining walls to prevent collapse of the excavation surface after excavation of the ground and installing it between the earth retaining walls. The present embodiment can also be applied to a case such as a temporary vent of a temporary bridge other than a steel pipe sprocket supporting a earth pressure.

Generally, in case of excavation of the ground, it is necessary to construct the pavement wall and the middle pile to prevent collapse of the excavation surface, and to install the pavement and the support beam horizontally on the pavement wall and then to install the pavement directly on the pavement, A strut is attached to the rear jack to support the earth pressure.

In the past, the H-shaped steel was mainly used as the strut, but in recent years, circular steel pipes and rectangular steel pipes have been widely used due to excellent axial rigidity and the like.

However, in the case of a round steel pipe or a square steel pipe, there is a problem in that it is not easy to join with the adjacent member due to the closed end face. That is, it is not easy to access the inner space for joining with the adjacent member, and is welded or bolted to the outside of the steel pipe, or welded or bolted after adding a separate member. However, the bonding is still difficult and it is difficult to secure a sufficient bonding strength even if bonding is performed.

In addition, when the steel pipe and the steel pipe are butted against each other, there is a problem that sufficient strength is not exhibited because the axial load is applied in the state where the thin end portions are in mutual alignment. That is, when the opposing steel tubes are shifted or inclined in a state in which the axial load is applied, stress is concentrated on a specific portion, local breakage occurs in this portion, and further, the strand itself may collapse.

Techniques for solving the above problems have been developed.

For example, Korean Patent Registration No. 10-1289149 (see Figs. 8a and 8b) "Steel pipe strut connection structure and steel pipe strut connection device" is disclosed. In this prior art, a tapered portion 110 is integrally coupled to one end of a steel pipe bracket 10 and has a smaller cross sectional area in a direction opposite to the steel pipe strut. And a flange member (130) integrally coupled to the other side of the tapered portion, wherein the flange member includes a plurality of bolt holes formed therethrough, and the flange member includes positioning means (150) Since the steel pipe bracket connecting device has no portion protruding from the steel pipe bracket, it is possible to secure the stability in the work space. Since the steel pipe bracket connecting device is integrally joined to the steel pipe bracket, It is possible to easily determine the thickness and size of the connecting device by providing a tapered portion and to reduce the bending moment even when a bending moment is generated in the steel pipe strut In order to provide a structurally stable steel pipe strut connection structure and a steel pipe strut connection device, Never.

However, in the prior art, the flange member 130 is formed with a through hole at its center, and the outer periphery thereof is not supported by the tape portion 110, so that the flange member 130 itself can not support a large axial load. Accordingly, when the axial load is concentrated on the narrow end of the tapered portion 110, and particularly when a flexural load is applied to the steel pipe strut, a structural problem may occur in the portion where the stress is concentrated. In addition, when the steel pipe strut 10 and the tapered portion 110 are joined together by welding or the like along the circumference of the contact portion, stress is exerted on the local point between the steel pipe strut 10 and the tapered portion 110 Can be structurally problematic as well. In addition, when the steel pipe strut 10 is round and the connecting device is located within the diameter of the steel pipe strut 10, there is a problem that an accident may occur when the steel pipe strut 10 is stacked in multiple stages.

Also, although it is a different technical field from the steel pipe strut, Korean Patent Registration No. 10-1424606 (see Figs. 9a and 9b) discloses a steel pipe socket and a method for connecting steel pipe pillar and steel pipe pillar using the same. This prior art has a socket support 110 for covering the upper end surface of a steel pipe pile 10; A plurality of plate-shaped socket inserting portions 120 extending downward from the socket supporting portion and inserted into socket grooves formed on the outer circumferential surface of the steel pipe pile; A plurality of fastening members 140 installed on the socket support for fastening the steel pipe pillar 20 mounted on the socket support portion and inserted into a gap between the end of the socket insertion portion and the bottom of the socket groove, Wherein the horizontal holding member has a wedge shape and the socket inserting portion having an outer diameter larger than that of the steel pipe pile is inserted into the socket groove and engaged with the steel pipe column and the steel pipe, The steel pipe socket facilitates the connection of the pile. The process of connecting the steel pipe pillar to the steel pipe column is simple, the air can be shortened, and it is economical. Also, the eccentricity removal of the steel pipe pillar or steel pipe column, And to provide a method for connecting steel pipe piles and steel pipe columns using the steel pipe sockets.

However, since the bolts of the fastening member 140 are installed in the socket supporting part 110, they must be installed before the socket inserting part 120 is coupled to the steel pipe pile 10. Therefore, Since the bolts of the fastening member 140 are first installed on the socket supporting part 110 and then the socket inserting part 120 is inserted into the socket supporting part 110, And the steel pipe pile (10) are welded directly on site, so it is difficult to secure the quality. Further, since the plurality of socket inserting portions 120 are separated from each other and are spaced around the steel pipe pile 10, there is a problem that it is difficult to exhibit a sufficient supporting force when the axial load and the flexural load act. In addition, the conventional technique has a problem that it is difficult to apply to a steel pipe strut which repeatedly performs joining and dismantling.

Thus, it is possible to easily connect to the adjacent member, to have excellent bonding strength, to prevent damage to the joint portion, to connect to various strands, wales, jacks, and the like, It is required to develop a steel pipe strut that is easy to store and transport, is free from loss, and is safely stored.

Patent 1: Korean Patent No. 10-1289149 Patent 2: Korean Patent No. 10-1424606 Patent 3: Utility Model No. 20-0414056 registered in Korea Patent 4: Korean Utility Model No. 20-2015-0004532

In order to solve the above problems, the present invention includes a hollow-shaped steel pipe having a length longer than a width, and a joining member that is engaged with both ends of the steel pipe, whereby the joining strength is excellent, And is easily coupled with various other members such as struts, jacks, wales, sidewalls, intermediate piles and the like, and the steel pipe and the engaging member are integrally joined to each other to facilitate storage and transportation, And which is secured when it is not mounted, and which is free from loss.

A steel pipe strut with an engaging member according to an exemplary embodiment of the present invention includes: a hollow steel pipe having a length longer than a width; And an engaging member which is engaged with both side ends of the steel pipe and used for joining with other adjacent members, wherein the engaging member which is engaged with one end of the engaging members, which are respectively engaged with both side ends of the steel pipe, A plurality of flanges inserted into and coupled to a plurality of cutout grooves formed along a circumferential direction of the steel pipe; And a coupling plate coupled to an outer end of the plurality of flanges, wherein the coupling plate has a plurality of coupling holes for coupling with the adjacent other members.

Further, the plurality of flanges may be installed radially from the center of the steel pipe, and may be mutually coupled at the center of the steel pipe.

Further, each of the plurality of flanges may be characterized in that the outer end is cut out.

형상으로 배치되는 것을 특징으로 할 수 있다.In addition,

And are arranged in a shape of a circle.

The joining member coupled to the other end of the joining member coupled to each of the opposite ends of the steel pipe may be the same as the joining member coupled to the one end.

In addition, the engaging member coupled to the other end of the engaging member engaged with the opposite side ends of the steel pipe may include a plurality of second flanges inserted into the plurality of cut grooves formed along the circumferential direction of the steel pipe, And a connection pipe disposed at a center of the steel pipe and coupled with the plurality of second flanges and having a screw formed therein, wherein a screw shaft of the jack is inserted into the connection pipe to adjust a gap therebetween .

The plurality of second flanges may be installed radially from the center of the steel pipe, and may be coupled with the connection pipe disposed at the center of the steel pipe.

형상으로 설치되고, 상기 강관의 중심에 배치된 상기 연결관과 결합되는 것을 특징으로 할 수 있다.In addition, the plurality of second flanges may be formed,

And is connected to the connection pipe disposed at the center of the steel pipe.

The pull-up port may further include a nut provided on an inner side of the steel pipe, an insertion hole formed through the steel pipe, an insert pin screwed into the nut through the insertion hole, And a circular or rectangular ring coupled to the insertion pin.

In addition, all or a part of the plurality of engagement holes may be long holes.

Further, the smallest cross-sectional area of any cross-sectional area of the engaging member is larger than the cross-sectional area of the central portion of the steel pipe.

The present invention can provide a steel pipe having a hollow pipe having a length longer than the width and an engaging member that is engaged with both ends of the steel pipe. The steel pipe of the present invention has excellent bonding strength, stably supports the axial load, And is easily combined with various other members such as struts, jacks, wales, sidewalls, intermediate piles and the like, and the steel pipe and the coupling member are integrally joined together, so that they are easily stored and transported, It is possible to provide an effect without loss of concern.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view, an exploded perspective view, and an enlarged view of a coupling portion showing a steel tube sprocket with a coupling member according to an example of the present invention. FIG.
Fig. 2 is a perspective view showing a state in which the steel pipe strut with the engagement member of Fig. 1a is coupled with the other member; Fig.
3 is an enlarged view of a perspective view, an exploded perspective view, and a coupling portion showing a steel tube sprocket with a coupling member according to another example of the present invention.
Fig. 4 is a perspective view showing a state in which the steel pipe strut with the engagement member of Fig. 3a is coupled with another member; Fig.
5 is an enlarged view of a perspective view, an exploded perspective view, and a coupling portion showing a steel tube sprocket with a coupling member according to another example of the present invention.
Fig. 6 is a perspective view showing a state in which the steel pipe strut with the engagement member of Fig. 5a is coupled with another member; Fig.
7 is a perspective view showing a state in which a steel pipe strut with a joining member according to an example of the present invention is installed in the field.
Figures 8 and 9 are views of the prior art.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a structure of a steel pipe strut with a joining member according to an example of the present invention will be described in detail with reference to the drawings. The steel pipe strut of the present embodiment can be applied to a case of a temporary vent of a temporary bridge as well as a strut that supports the earth pressure. For the sake of convenience of explanation, the following description will be given assuming a steel pipe strut supporting the earth pressure.

1 and 2, a steel pipe strut with an engaging member according to an exemplary embodiment of the present invention (hereinafter referred to as a strut steel pipe for convenience) comprises a steel pipe 10 and two side ends of the steel pipe 10 And the coupling member 20 can be used to easily and quickly couple the stranded vessel with another adjacent member. Here, the other member means an adjacent strut, jack, wale, side wall, intermediate pile, and so on, and so on. Hereinafter, the inside refers to the side closer to the center of the steel pipe 10, and the outside refers to the opposite side.

The steel pipe 10 may have a hollow shape with a longer length than the width and may have a circular or square cross section. Such a steel pipe 10 is excellent in bending stiffness compared with H-shaped steel which has been conventionally used as a strut, and is excellent as a strut. The steel pipe 10 of the present embodiment can be produced simply, quickly, and economically since it can be used as it is without any need to manufacture separately.

The joining member 20 is used for joining with other adjacent members and includes a plurality of flanges 21 inserted and joined to a plurality of cutout grooves formed along the circumferential direction of the steel pipe 10, And a connecting plate 23 coupled to the outer end of the flange 21 of the connector.

The present embodiment is characterized in that the plurality of flanges 21 are welded to the steel pipe 10 in a very wide range after being inserted into the cut groove of the steel pipe 10, , A plurality of flanges (21) can be firmly coupled to the steel pipe (10). Further, since the axial load transmitted to the steel pipe 10 through the flange 21 is accommodated in the entire cutout groove, the axial load can be supported very stably. Therefore, in the strut of the present embodiment, since the steel pipe 10 and the engaging member 20 are firmly engaged and the axial load transmitted through the engaging member 20 can be received very stably by the steel pipe 10, great.

In addition, the strut of the present embodiment has a structure in which the thin flange 21 of the steel pipe 10, that is, the connecting plate 23 having a large area but not the thin end face of the end portion of the steel pipe 10, No damage shall occur to the site.

In addition, the strut of the present embodiment has a structure in which the joining member 20 is joined to the steel pipe 10 by welding or the like so that the joining member 20 is not lost, the joining member 20 is easily stored and transported, 20), it is possible to secure safety because the strut does not roll.

The plurality of flanges 21 may be arranged in the radial direction at the center of the steel pipe 10. That is, the plurality of flanges 21 may be welded at the center after being disposed radially in three directions, four directions, five directions, six directions, seven directions, eight directions, etc. from the center of the steel pipe 10. The flanges 21 are arranged in the radial direction at the center of the steel pipe 10 and welded to each other at the center so that the flanges 21 are firmly engaged with each other, 10, the strength of the joining member 20 and the joining strength between the joining member 20 and the steel pipe 10 are excellent.

When the plurality of flanges 21 are arranged in an even number such as four directions, six directions, eight directions, etc., the flanges 21 are prepared in two, three, four, etc., The welding can be performed quickly and easily, and the bonding strength can be increased.

That is, in the case of manufacturing two pieces, one can cut the outer half, and the other one can cut the inner half and then weld the pieces together. In the case of three pieces, one is cut out to the outside 2/3, the other is cut to the inside and the outside to 1/3, and the other is cut to the inside 2/3, . In addition, in the case of four pieces, one of the outer 3/4 is incised, the other one is cut into the inner 1/4 and the outer 2/4, the other one is cut into the inner 2/4 and the outer 1/4, The other one can be welded after inserting 3/4 of the inside and then intertwining.

In addition, each of the plurality of flanges 21 can be cut at its outer end so that the cross-sectional area becomes smaller toward the outer side. In other words, by forming the entire flange 21 composed of the plurality of flanges 21 in the shape of a tape which becomes smaller as it goes outward, it is possible to safely support the axial load and to prevent the crack 21 of the flange 21 from being damaged And the like can be prevented.

형상으로 배치될 수 있다. 이 경우 총 12개의 부재를 상호 용접 결합하거나, 또는 총 4개를 부분적으로 절개한 후 상호 끼움 결합함과 동시에 용접 결합할 수 있다. Referring to Figures 3 and 4, a plurality of flanges 21

Shape. In this case, a total of twelve members may be welded to each other, or a total of four may be partially cut and welded together while being intertwined.

형상으로 배치되는 경우 플랜지(21) 상호간이 견고히 결합되고, 동시에 각 플랜지(21)는 강관(10)의 절개홈에 삽입되어 견고히 결합됨으로써, 결합부재(20)의 자체의 강도와 결합부재(20)와 강관(10)과의 결합강도가 매우 우수하다.A plurality of flanges 21

The respective flanges 21 are inserted into the cutout grooves of the steel pipe 10 and are firmly engaged with each other so that the strength of the engaging member 20 itself and the strength of the engaging member 20 ) And the steel pipe 10 is very excellent.

As described above, in the method of partially welding the flange 21 and then welding it, there is an integral part, there is no damage to the strength, and the welding part is reduced, so that the welding work can be quick and convenient.

It is preferable that the sum of the cross sectional areas of the plurality of flanges 21 constituting the coupling member 20 is larger than the cross sectional area of the steel pipe 10. This is achieved by adjusting the number of the plurality of flanges 21, 21). ≪ / RTI > The reason why the sum of the cross sectional areas of the plurality of flanges 21 is larger than the cross sectional area of the steel pipe 10 is that the steel pipe strut breakage can be caused in the simple steel pipe 10 and the strength of the steel pipe strut can be easily calculated can do.

The connection plate 23 is coupled to the outer end of the plurality of flanges 21 by welding or the like and may have a plurality of coupling holes 231 for coupling with other adjacent members by bolts or the like.

The connecting plate 23 is joined to the plurality of flanges 21, thereby increasing the rigidity of the flange 21, thereby increasing the rigidity of the connecting member 20.

Since the plurality of coupling holes 231 of the coupling plate 23 are easily coupled to other adjacent members with bolts or the like, the fastening operation can be very fast and convenient. In addition, since a large area of the connecting plate 23 is brought into contact with and joined to another adjacent member, the structural stability can be remarkably increased as compared with the case where the thin surface of the end portion of the steel pipe 10 is joined with another adjacent member.

The plurality of coupling holes 231 may be formed as a long hole having a long length on one side or a part thereof. The elongated hole can easily couple the stranded bulb and other members irrespective of the type and shape of the other members, or the error in the manufacture and construction of the coupling member 231.

The joint member 20 may have the same shape at both side ends of the steel pipe 10. In addition, the coupling member 20 may be coupled to one end and the coupling member 20 may be coupled to the other end.

5 to 6, a joining member 20 having a different shape is inserted into a plurality of cutting grooves formed along the circumferential direction of the steel pipe 10 at the other end of the steel pipe 10, A second flange 25 and a connecting pipe 27 disposed at the center of the steel pipe 10 and joined to the plurality of second flanges 25. [

형상으로 배치된 복수의 제2플랜지(미도시)의 중앙의 사각 형상의 공간에 연결관이 배치되어 결합될 수 있다.The second flange 25 is similar to the flange 21 of the coupling member 20 of the above-described embodiment, and the flange 21 described above is referred to for a detailed description thereof. However, in the present embodiment, the plurality of second flanges 25 are coupled to the connecting pipe 27 disposed at the center of the steel pipe 10. As shown in the figure, a plurality of second flanges 25 are arranged in the radial direction, and a connecting pipe 27 is disposed at the center of the plurality of second flanges 25, Can be combined. Also,

The connection pipe can be disposed and joined to a square space at the center of a plurality of second flanges (not shown) arranged in a shape.

A screw is formed in the coupling tube 27. A shaft of a screw formed in the coupling tube 27 is inserted and screwed so that the distance between the strut and the wrist can be easily adjusted. Therefore, a strut can be easily installed so as to firmly support the earth retaining wall between the retaining walls.

(Not shown) can be coupled to the outer ends of the plurality of second flanges 25. In this case, a hole may be formed in the connection plate so that a jack can be inserted into the connection tube 27. Therefore, the engaging member 20 can be coupled to the jack, or can be coupled to the tarpaulins, wales, etc., using the connecting plate 23 as described above.

It is preferable that the cross sectional area of the joint member 20, that is, the cross sectional area of the sum of the plurality of second flanges 25 and the joint pipe 27 is larger than the cross sectional area of the steel pipe 10. For example, the smallest cross-sectional area of any cross-sectional area of the engaging member 20, for example, the cross-sectional area at the cut-out position of the outer end is set to be larger than the cross- .

In addition, pulling openings (30) can be provided near both ends of the steel pipe (10) so as to facilitate the pulling operation of the steel pipe (10). The pulling mouth 30 includes a nut 31 provided inside the steel pipe 10, an insertion port 33 formed to penetrate the steel pipe 10, and an insertion hole 33 which is coupled to the nut 31 through the insertion hole 33 And a circular or rectangular ring 37 coupled to the insertion pin 35. The insertion pin 35 may be formed of a metal, Therefore, the pull-up tool 30 can be removed or installed if necessary.

The pulling mouth 30 may be free of the nut 31 or may be configured without both the nut 31 and the insertion pin 35. [ That is, the pull-up mouth 30 is composed of only the ring 37 and can be welded to the outside of the steel pipe 10. In addition, the pull-up port 30 may be configured to be rotatably coupled to the steel pipe 10 so as to be folded when not in use.

In this embodiment, since the end of the steel pipe 10 is opened without being hermetically closed, it is easy to fasten and dismount the pulling mouth 30, so that the pulling mouth 30 can be easily installed only when necessary. That is, by holding the nut 31 through the unsealed portion of the steel pipe 10 and rotating the ring 37, the pull-up port 30 can be easily fastened or separated. The open portion can easily discharge rainwater or the like that has flowed into the steel pipe 10 to prevent corrosion of the steel pipe 10 and can observe the inner side of the steel pipe 10, It is possible to easily grasp the availability.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Steel pipe
20:
21: Flange
23: connection plate
231:
25: second flange
27: Connector
30: Impression hole
31: Nuts
33:
35: Insertion pin
37: Ring

Claims (11)

delete A hollow-shaped steel pipe having a length longer than the width; And
And an engaging member which is engaged with both side ends of the steel pipe and is used for the purpose of engaging with another adjacent member,
Wherein the engaging member, which is engaged with one end of the engaging member which is engaged with each of both side ends of the steel pipe,
A plurality of flanges inserted into and coupled to a plurality of cutout grooves formed along a circumferential direction of the steel pipe; And
And a connecting plate coupled to an outer end of the plurality of flanges,
Wherein the connecting plate comprises:
A plurality of coupling holes for coupling with other adjacent members are formed,
Wherein the plurality of flanges comprise:
Wherein the steel pipe is radially disposed at the center of the steel pipe,
Wherein each of the plurality of flanges is cut at an outer end thereof,
Wherein a minimum cross-sectional area of an arbitrary cross-sectional area of the engaging member is larger than a cross-sectional area of a central portion of the steel pipe.
delete A hollow-shaped steel pipe having a length longer than the width; And
And an engaging member which is engaged with both side ends of the steel pipe and is used for the purpose of engaging with another adjacent member,
Wherein the engaging member, which is engaged with one end of the engaging member which is engaged with each of both side ends of the steel pipe,
A plurality of flanges inserted into and coupled to a plurality of cutout grooves formed along a circumferential direction of the steel pipe; And
And a connecting plate coupled to an outer end of the plurality of flanges,
Wherein the connecting plate comprises:
A plurality of coupling holes for coupling with other adjacent members are formed,
Wherein the plurality of flanges comprise:

Shaped,
Further comprising a pull-up port provided near an end of the steel pipe,
Wherein the pull-up port includes a nut provided on the inner side of the steel pipe, an insertion port formed through the steel pipe, an insertion pin screwed into the nut through the insertion port, and a circular or rectangular ring coupled to the insertion pin,
Wherein a minimum cross-sectional area of an arbitrary cross-sectional area of the engaging member is larger than a cross-sectional area of a central portion of the steel pipe.
The method according to claim 2 or 4,
Wherein the coupling member coupled to the other end of the coupling member coupled to each of the opposite ends of the steel pipe is the same as the coupling member coupled to the one end of the coupling member.
The method according to claim 2 or 4,
And an engaging member coupled to the other end of the engaging members engaged with the opposite side ends of the steel pipe,
A plurality of second flanges inserted into and coupled to a plurality of cutout grooves formed along a circumferential direction of the steel pipe; And
And a connection pipe disposed at the center of the steel pipe and coupled with the plurality of second flanges,
Wherein a screw shaft of the jack is inserted into the coupling pipe so that the gap can be adjusted.
The method of claim 6,
Wherein the plurality of second flanges comprise:
Wherein the connecting pipe is installed radially from the center of the steel pipe and is engaged with the connecting pipe disposed at the center of the steel pipe.
The method of claim 6,
Wherein the plurality of second flanges comprise:

Wherein the connecting pipe is installed in the shape of a pipe and is coupled with the connecting pipe disposed at the center of the steel pipe.
The method of claim 2,
Further comprising a pull-up port provided near an end of the steel pipe,
The pull-up port includes a nut provided on the inner side of the steel pipe, an insertion port formed through the steel pipe, an insertion pin screwed into the nut through the insertion port, and a circular or rectangular ring coupled to the insertion pin Wherein the coupling member is provided with a coupling member.
The method according to claim 2 or 4,
Wherein all or a part of the plurality of engagement holes is a long hole. delete

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