JP2014190027A - Steel built-up column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel built-up column capable of protecting a connection structure of a connection material included in a steel built-up column body from corrosion and permanently maintaining it without applying tensioning means thereto, by using a support member for supporting an end of the connection material as an exclusive member which is not used as a member for a cover blocking the end of the steel built-up column, and excellent in soundness.SOLUTION: A stand column 3 of the uppermost stage has a small diameter part 3a of which diameter is reduced by concavely narrowing a part of an upper part of the stand column and which is formed on an inside surface of the upper part. An anchor plate 5 to which an upper end of a linear connection material 4 for fall prevention is attached is fittingly fixed to the small diameter part 3a from above, and a lower end part of the linear connection material 4 is attached to a holding member 6 provided in a stand column 1 of the lowermost stage.

Description

  The present invention is in the technical field of a steel assembly column (also referred to as a steel plate assembly column) in which a plurality of tube columns are joined so as to partially overlap each other, and an antenna, illumination, speaker, or lightning rod can be externally attached. More specifically, the present invention relates to a steel assembly column that connects the uppermost and lowermost tube columns via a drop-connecting linear connecting material (wire material, etc.) to prevent the uppermost tube column from falling. .

  Among the steel assembly columns, various inventions are disclosed in which the uppermost tube column and the lowermost tube column are connected by a linear connecting member such as a wire rope to prevent the uppermost tube column from being pulled out (dropped). (For example, refer patent documents 1-3).

  In Patent Document 1, as shown in FIGS. 1 and 2 of the same document 1, a lower retaining metal fitting 7 is attached to the outside of the bottom cap 2 fitted to the bottom of the lower tube column 1 in the assembly column. The retaining metal fitting 10 is attached to the arm metal fitting 4 fixed to the outer periphery of the upper tube pillar 3 in the assembly column, and the lower retaining metal 7 and the upper retention metal fitting 10 extend along the outer surface of the assembly column. An apparatus for preventing pulling out of an assembly column connected via a connecting member 5 (a linear shape made of a wire rope or the like) is disclosed.

  In Patent Document 2, as shown in FIG. 1 of Patent Document 2, a joining column formed by sequentially adding a plurality of taper tubes 1 to 4 and a top lid 15 covering the top of the joining column; The bottom lid 11 abutting on the bottom end, the hook bolt 16 and the double nut 17 fitted to the top lid 15, the hook bolt 12 and the nut 13 fitted to the bottom lid 11, and the two hook bolts 16 , 12 and a wire rope 20 that connects the two hook bolts 16 and 12 via the wire rope 20 at the center line of the joint column.

  In Patent Document 3, as shown in FIGS. 1 and 2 of the same document 3, the retaining metal fitting 3 is locked to the small diameter portion of the tapered hole 2 in the pedestal 1 and is fitted to the top of the pedestal 1. A top cap 5 is fitted to the top of the upper tube pillar 4 and the retaining metal fitting 3 and the top cap 5 are connected via a connecting member 6 extending along the center of the upper tube pillar 4. An assembly column pull-out prevention device is disclosed.

Japanese Utility Model Publication No. 63-29798 Japanese Utility Model Publication No. 47-33990 Japanese Utility Model Publication No. 63-29797

  The invention according to the above-mentioned patent document 1 is a member (connection member 5, arm metal mounting bracket 4, arm bracket 8, upper retaining metal bracket 10, bottom cap 6, and the like provided for connection between the upper tube column 3 and the lower tube column 1. Further, since all of the lower retaining metal fittings 7) are exposed to the outside, each member, particularly the connecting material 5, is likely to be damaged or deteriorated, and it has been difficult to maintain a stable connecting structure in the long term.

The invention according to Patent Document 2 includes a connecting material (wire rope 20) that is most likely to be damaged or deteriorated among members used for connecting the uppermost tapered tube 4 and the lowermost tapered tube 1. Since it has a (built-in) configuration, it can be recognized that improvements can be made.
However, since the hook bolts 16 and 12 that support the upper and lower ends of the wire rope 20 are configured to pass through the top lid 15 and the bottom lid 11, bolt bolts provided at the centers of the lids 15 and 11 are used. There was a problem that rainwater or the like entered from the hole, and the hook bolts 16 and 12 and the wire rope 20 were corroded, and the durability was remarkably lowered. Further, since the hook bolt 16 and the nut 17 protrude from the center of the top cover 15, it is very difficult to install another member such as an antenna on the top surface of the top cover 15, and there is a problem that implementation variations are limited.

  Although the invention according to Patent Document 3 is devised in the configuration for fixing the lower end of the connecting material as compared with Patent Document 2, the configuration for fixing the upper end of the connecting material is the same as in Patent Document 2, There was a problem similar to the above-mentioned Patent Document 2.

In addition, the inventions according to Patent Documents 1 to 3 are commonly performed by tensing the connecting material (wire rope), so that it takes time and effort to damage and deteriorate the linking material. There was also a problem that it was easy to occur.
Each of the problems described above is considered to result from the fact that the supporting member that supports the end portion of the connecting member and the lid member that closes the end portion of the steel assembly column are combined into one member.

  The present invention has been devised in view of the above-mentioned problems of the background art, and the object of the present invention is to provide a support member for supporting the end of the connecting material, and to connect the end of the steel assembly column. By using a dedicated member that does not serve as a closing lid member, the connection structure of the connecting material contained in the steel assembly pillar body can be permanently protected from corrosion without applying tension means. An object of the present invention is to provide a steel assembly column with excellent soundness.

As a means for solving the problems of the background art, a steel assembly column according to the invention described in claim 1 is a steel assembly column obtained by adding a plurality of tube columns so that a part of them overlap each other.
The uppermost tube column has a small diameter portion formed by constricting a part of its upper portion in a concave shape to reduce the diameter, and an upper end portion of a linear connecting material for preventing fall is attached to the small diameter portion. The fixing plate is fitted and fixed from above, and the lower end portion of the linear connecting member is attached to a holding member provided in the lowermost tube column.

  According to a second aspect of the present invention, in the steel assembly column according to the first aspect of the present invention, a U bolt is suspended from the fixing plate, and an upper end portion of the linear connecting member is provided on the U bolt. It is attached.

  According to a third aspect of the present invention, in the steel assembly column according to the first or second aspect of the present invention, a flange is provided on the outer periphery of the top end portion of the uppermost tube column. To do.

  According to a fourth aspect of the present invention, in the steel assembly column according to any one of the first to third aspects, the top of the uppermost tube column is provided with a lid. Features.

  According to a fifth aspect of the present invention, in the steel assembly column according to any one of the first to fourth aspects, the holding member is a bolt provided penetrating in the radial direction of the lowermost tube column. It is characterized by being.

The steel assembly pillar according to the present invention has the following effects.
1) The fixing plate provided at the upper end of the linear connecting member does not serve as a cover for the steel assembly column, and the steel assembly column main body is used to prevent the uppermost tube column from falling. It is carried out by being fitted into a small diameter part inside the uppermost tube column. Therefore, since it is not necessary to apply a tension means in particular, the attaching operation can be performed smoothly and easily.
2) Since the above-mentioned linear connecting material only needs to be connected in a loosened (loosened) state between the uppermost tube column and the lowermost tube column, the connecting operation is simple, and the linear connecting material Damage and deterioration can be prevented as much as possible.
3) The lid member does not need to be attached by tensioning the linear connecting member as in the background art, and is simply attached to the top of the uppermost tube column. Therefore, it is possible to employ attachment means that can reliably prevent the intrusion of rainwater or the like, such as providing a flange on the outer periphery of the top end portion of the tube pillar. Moreover, a lid material rich in variations can be employed.
4) In short, by making the supporting member that supports the end of the linear connecting material a dedicated member that does not serve as a lid member that closes the end of the steel assembly column, The connecting structure of the linear connecting material to be included can be permanently protected from corrosion without applying tension means.

It is the elevation which showed the Example of the steel assembly pillars concerning this invention. A is a front view showing a lowermost tube column constituting the steel assembly column, B is a side view thereof, C is a plan view thereof, and D is a bottom view thereof. . A is a front view showing a middle tube column constituting the steel assembly column, B is a side view thereof, C is a plan view thereof, and D is a bottom view thereof. A is the front view which showed the uppermost stage tube pillar which comprises the said steel assembly pillar, B is the same side view, C is the same top view, D is the same bottom view. . It is the front view which showed the linear connection material etc. which are provided in the inside of the said steel assembly pillar. 1A is a plan view showing a fixing plate used in the steel assembly column according to FIG. 1, and B and C are plan views showing variations of the fixing plate, respectively. FIG. It is the top view which showed the cover material used for the steel assembly pillar concerning FIG. A is the front view which showed the variation of the lid | cover material, B is the same top view. A is the front view which showed the variation of the lid | cover material, B is the same top view. A is a front view showing a variation, and B is a plan view of the same. A is the front view which showed the variation of the linear connection material, B is the same top view. FIGS. 11A to 11C are work process diagrams showing step by step a process of fitting the linear connecting member according to FIG. 11 to the small diameter portion of the steel assembly column (uppermost column). A is the front view which showed the frame material which attaches the lowermost tube pillar of a steel assembly pillar, B is the side view, C is the top view. A is the front view which showed the step which attached the lowermost tube pillar of the steel assembly pillars to the said frame material, B is the side view, C is the top view. A and B are work process diagrams showing a step-by-step process of adding a middle tube column to the lowest tube column attached to the frame material. A and B are operation | work process diagrams which showed the process of constructing a steel assembly pillar main body by adding the uppermost stage pipe pillar to the middle stage pipe pillar concerning FIG. A and B are operation | work process diagrams which showed the process of attaching the linear connection material etc. which concern on FIG. 5 inside the steel assembly pillar main body concerning FIG. FIG. 18 is an operation process diagram illustrating a process of installing the lid member according to FIG. 10 after the linear connecting member according to FIG. 17 is attached.

  Next, an embodiment of a steel assembly column according to the present invention will be described with reference to the drawings.

  FIG. 1 shows an entire steel assembly column 10 according to the present invention. The steel assembly column 10 is formed by adding a plurality of (three in this embodiment) tube columns 1, 2, and 3 so that they partially overlap each other, and the uppermost column 3 is a part of the upper portion thereof. A small-diameter portion 3a is formed on the inner surface by reducing the diameter to a concave shape, and a fixing plate 5 to which the upper end portion 4a of the linear connecting member 4 for preventing the fall is fitted is fitted into the small-diameter portion 3a from above. The lower end portion 4 b of the linear connecting member 4 is attached to a holding member (bolt) 6 provided in the lowermost tube column 1.

As shown in FIGS. 2 to 4, the three pipe columns 1, 2, and 3 constituting the steel assembly column 10 are sequentially added upward so that a part thereof overlaps as shown in FIGS. 2 to 4. It is implemented in a form suitable for constructing the main body of the steel assembly column 10. That is, of the pipe columns 1, 2, and 3, the outer diameter of the lower end portion of the lowermost tube column 1 (190.7 mm in this embodiment) is the largest dimension, and the outer diameter of the upper end portion of the lowermost tube column 1 ( 174mm) is slightly smaller than the inner diameter of the lower end (179mm) of the middle tube column 2, and the outer diameter (125mm) of the upper tube column 2 is the lower end of the uppermost tube column 3. The dimensions are slightly smaller than the inner diameter (129mm). Each height is about 2m. Incidentally, the overlap of the tube column 1 and the tube column 2 is about 1.5 times the inner diameter of the lower end of the tube column 2, and the overlap of the tube column 2 and the tube column 3 is the inner diameter of the lower end of the tube column 3. About 1.5 times is the standard design.
The tube columns 1, 2, and 3 are both manufactured by shearing a steel plate having a thickness of about 4.5 mm into a predetermined size and shape, bending the steel plate into a circular shape by a molding machine, and welding the joint. The tube pillars 1, 2, and 3 according to the height example are implemented with a configuration in which a taper portion is provided in the middle portion, a small diameter portion is provided in the upper portion thereof, and a large diameter portion is provided in the lower portion thereof. However, it is possible to change the design as appropriate, for example, by forming the tube pillars 1, 2, and 3 in a tapered shape over the entire axial direction. Moreover, it can also carry out by welding and joining a scaffolding bolt attachment metal | metal fitting to the outer periphery of the said pipe pillars 1, 2, and 3 with a predetermined space | interval (refer the code | symbol 21 of FIGS. 15-17).

Incidentally, reference numeral 1a in FIG. 2B relating to the lowermost tube column 1 indicates a through hole for allowing the holding member 6 to pass through in the radial direction, and reference numeral 1b is used for hanging and supporting with a wire or the like as necessary. A through hole is shown, and reference numeral 1c denotes a marking for increasing the efficiency of the adding work.
Reference numeral 2a in FIG. 3B relating to the middle tube column 2 indicates a through hole for hanging and supporting with a wire or the like as necessary, and reference numerals 2b and 2c indicate markings for improving the efficiency of the addition work. Yes.
Reference numeral 3b in FIG. 4B relating to the uppermost tube column 3 similarly indicates a marking for increasing the efficiency of the addition work.

In the present invention, among the tube columns 1, 2, and 3, the uppermost tube column 3 is formed with a small-diameter portion 3a on the inner side surface by reducing a part of the upper portion of the tube column 3 into a concave shape by pressing or the like. Is a major feature.
The significance of providing the small-diameter portion 3a of the pipe column 3 in the upper portion (in the illustrated example, about 10 cm below the top end) is the reliability of the work of fixing the fixing plate 5 to the small-diameter portion 3a from above, the outer periphery of the tube column 3 When mounting peripheral members such as antennas by providing mounting members (mounting hardware) such as bands, avoiding the mounting members, and in addition, pulling up the pipe columns 2 and 3 while pulling the linear connecting member 4 upward from below This is because the appropriate dimensions and the like of the linear connecting material 4 in the case of constructing by connecting are taken into consideration.

  Further, the tube pillar 3 according to the present embodiment has a plurality of bolt holes 7a (four in the illustrated example) on the outer periphery of the top end (upper end) in order to facilitate the attaching operation of the lid member 9 provided on the top. The provided annular flange 7 is provided by a joining means such as welding.

  In this embodiment, the main body of the steel assembly column 10 is constructed with three tube columns 1, 2, and 3. However, the number is not limited to this, and two or four or more columns can be similarly implemented. . Even in such a case, the small diameter portion 3a is formed in the upper part of the uppermost tube column, and a through hole through which the holding member 6 is passed is provided in the lowermost tube column.

Next, a description will be given of the fall-preventing linear connecting member 4 provided in the main body of the steel assembly column 10 formed by adding the tube columns 1, 2, and 3 having the above-described configuration.
In the present embodiment, the linear connecting member 4 is made of galvanized wire, and the upper and lower end portions thereof are formed by inserting an end portion of a rope into an elliptical aluminum tube 4c as shown in FIG. ), And compressed and fastened by a press machine. The eye of the upper end portion 4 a plays a role of hanging on the U bolt 8, and the eye of the lower end portion 4 b plays a role of passing the holding member 6. There is also a method of forming an eye using a bolt clip instead of the aluminum tube 4c.
A round fixing plate 5 (see also FIG. 6A) is mounted on the upper end portion (both arm portions) of the U bolt 8 that holds and supports the eye of the upper end portion 4a. Thus, the U bolt 8 is suspended from the lower portion of the fixing plate 5, and the upper end 4 a of the linear connecting member 4 is attached to the U bolt 8. The fixing plate 5 according to the illustrated example has four bolt through holes 5a, two of which are used for fixing U bolts, and the other two are drain holes (mainly measures against rainwater during installation work). ).

  Incidentally, the total length of the linear connecting member 4 according to the present embodiment is approximately the same as or slightly longer than the total length of the steel assembly column 10, but is not limited thereto, and is about 20 to 30 cm long. It doesn't matter. In short, it is only necessary to have dimensions that can prevent the pipe column 3 from falling to the ground when an external load is generated such that the uppermost column 3 is removed.

In addition, the said linear connection material 4 can be similarly implemented with various wire materials, a rope material, or a cable material besides a galvanized wire.
The fixing plate 5 to be mounted on the U-bolt 8 is not limited to a round shape, but is similarly applied to an oval (oval) fixing plate 15 shown in FIG. 6B and a notched circular fixing plate 25 shown in FIG. 6C. it can. In this case, the bolt through holes 15a and 25a are used for fixing the U-bolt 8, and a portion cut out from a circular shape (corresponding to the upper cross-sectional shape of the tube column 3) is used for draining water.

Next, the lid member 9 provided on the top of the steel assembly column 10 (tube column 3) will be described.
The lid 9 according to the present embodiment is a round flat plate having an outer shape that is the same as the outer shape of the flange 7 and a bolt through hole 9a provided at a position that coincides with the flange hole 7a provided in the flange 7. It has been implemented (see FIGS. 1 and 7). The lid member 9 having such a configuration is placed so as to cover the upper end opening of the tube column 3, and the lid member 9 is connected to the flange hole 7a and the bolt through hole 9a with bolts and fastened with nuts. Installed on top of column 3 (steel assembly column 10 main body). In this case, an external member such as an antenna, an illumination, a speaker, or a lightning rod is attached using an attachment member such as a band attached to the shaft portion of the tube pillar 3.

Various variations of the lid member 9 are conceivable. As an example, for example, FIG. 8 shows a lid member 11 in which a pipe 11a for antenna installation is erected on the extended portion of a round flat plate having an extended portion. FIG. 9 shows a round lid member 12 in which a lightning rod 12a is erected at the center of the upper surface. FIG. 10 shows a so-called lid (mix) -shaped lid member 13 of FIGS. 8 and 9. In FIG. 10, reference numeral 13a indicates a lightning rod, and reference numeral 13b indicates a pipe for antenna installation.
Since the lid materials 11, 12, and 13 according to these variations are provided with bolt through holes 11 b, 12 b, and 13 c that coincide with the flange holes 7 a of the flange 7, as in the lid material 9, the lid material 9 can be installed on the upper surface of the flange 7 of the pipe column 3 in the same manner. Further, although not shown, it is of course possible to further install the lid materials 11, 12, 13 on the upper surface of the lid material 9.

  The joining structure between the linear connecting member 4 and the fixing plate 5 is not limited to FIG. 5 (see paragraph [0026] above). For example, as shown in FIG. 11, a wire 4 ′ having a threaded bolt attached to the upper end and a fixing plate 5 ′ provided with a bolt through hole in the center are used. The same can be applied to a joining structure in which the fixing plate 5 ′ is mounted using the above-mentioned. That is, as shown in FIGS. 12A to 12C in a stepwise manner, the joining structure is formed by fixing the fixing plate 5 ′ with the wire 4 ′ suspended thereon to the small diameter portion 3 a of the tube column 3, and then the lid material 9. (11, 12, 13) is placed so as to cover the upper end opening of the tube pillar 3, and the flange hole 7a and the bolt through hole 9a (11b, 12b, 13c) which are matched are tightened with nuts through bolts. The lid member 9 (11, 12, 13) can be installed on the top of the tube column 3 and eventually the steel assembly column 10 main body. Incidentally, reference numeral 14 in the figure denotes a washer, and reference numeral 5a 'denotes a drain hole.

  The steel assembly pillar 10 having the above-described configuration is implemented by being constructed on the building rooftop or on the ground. When building on the building roof, install the bottom column 1 using the existing frame material for rooftop parapets, the walls of existing buildings and water storage buildings, or signboards. To construct. When constructing on the ground, the construction is usually performed by adding the work after embedding the lower part of the lowermost column 1 in the ground. When using the rooftop parapet, the wall of an existing building or water storage building, install (fix) the lowermost column 1 using a mounting band (see symbol 20 in FIG. 14), chemical anchors, etc. To build. A case where an existing frame material for signboard attachment or the like is used will be described later. Usually, the addition work on the building roof is performed using a pulley or the like by using an existing building or water storage building or a frame scaffolding, and the addition work on the ground is performed using a heavy machine such as a crane. .

FIGS. 13-18 has shown the Example which builds the steel assembly pillar 10 using the existing frame material (H-section steel) 16 on a building roof.
First, as shown in FIG. 13, a plate plate 17 and a column receiving plate 18 having an outer shape that is longer than the vertical dimension of the frame member 16 and having bolt through holes common to the four corners are prepared. The frame material 16 is sandwiched between them, and the plates 17 and 18 are positioned and fixed to the frame material 16 by fastening a long bolt 19 to the common bolt through hole with a nut (or a double nut). . In the figure, reference numeral 18a denotes a column receiving portion, and reference numeral 18b denotes a column supporting portion (angle material).

Next, as shown in FIG. 14, the lowermost tube column 1 is placed on a column receiving plate 18 positioned and fixed to the frame member 16, and a U-shaped attachment band 20 having fixing portions 20a on both arms is provided. The tube pillar 1 is installed on the frame material 16 via the pillar receiving plate 18 by attaching (attaching / detaching) the long bolt 19. Thus, the pipe column 1 is installed on the frame material 16 in a state of being raised about several tens of centimeters from the roof surface due to the support effect of the column support portion 18 b of the column receiving plate 18. In this embodiment, the lower mounting band 20 of the mounting bands 20 is positioned and fixed so that the base end portion of the notch groove portion coincides with the bolt through hole 1 a of the tube column 1. .
Subsequently, the holding member (bolt) 6 is passed through the base end portion of the notched groove portion and the bolt through hole 1a, and the nut is loosened and fastened to be in a temporarily fastened state.

  Next, as shown in FIG. 15, the middle tube column 2 is suspended and supported by the wire 22 using a pulley or the like, and aligned with the lowermost tube column 1 fixed to the frame material 16. The middle column 2 is lowered and added. In the addition work, the marking 1c of the lowermost tube column 1 and the marking 2c of the middle tube column 2 are made to coincide with each other, and the middle tube column 2 is pulled (pushed in) with a predetermined overlap margin as a guideline. The pull-in operation of the middle tube column 2 can be carried out by attaching a nylon sling and a chain block to the tube columns 1 and 2 as necessary in order to increase the coupling strength with the lowermost tube column 1. (Not shown).

  Next, as shown in FIG. 16, the uppermost tube column 3 is suspended and supported by a wire 22 using a pulley or the like, and is aligned with the middle tube column 2 joined to the lowermost tube column 1. After that, the uppermost tube column 3 is lowered to perform addition work, and the main body of the steel assembly column 10 is constructed. In the addition work, the marking 2b of the middle pipe column 2 and the marking 3b of the uppermost pipe column 3 are made to coincide with each other, and the uppermost pipe column 3 is pulled in (pushing in) with a predetermined overlap allowance as a guideline. . The pull-in operation of the uppermost tube column 3 can be carried out by attaching a nylon sling and a chain block to the tube columns 2 and 3 as necessary in order to increase the coupling strength with the middle tube column 2. (Not shown).

Next, as shown in FIG. 17, from above the main body of the steel assembly column 10, a linear connecting member 4 ′ (see FIG. 11) having a fixing plate 5 ′ at the upper end is inserted and lowered, The fixing plate 5 ′ is fastened to the small diameter portion 3 a of the uppermost tube column 3. This operation can be performed smoothly because the small diameter portion 3a is only about 10 cm away from the top end of the tube column 3.
Subsequently, the holding member (bolt) 6 in a temporarily fastened state is detached and passed through the eye (ring) at the lower end of the linear connecting member 4 ′, and a nut is fastened to thereby tighten the linear connecting member 4 ′. The lower end portion is restrained by the holding member 6. In this operation, the lowermost tube column 1 is installed on the frame member 16 in a state where it is lifted about several tens of centimeters from the roof surface, so that a sufficient working space is secured, and the linear connecting member 4 ' Since it is only necessary to attach to the holding member 6 without tensioning, it can be performed smoothly.
Thus, since the lowermost tube column 1 and the uppermost tube column 3 constituting the main body of the steel assembly column 10 are connected via the linear connecting member 4 ', the uppermost tube column 3 is provided. Even when an external load is generated such that the pipe pillar 3 is pulled out, it is possible to realize a connection structure that can prevent the tube pillar 3 from falling to the ground.
It should be noted that the same operation procedure can be used when the linear connecting member 4 having the fixing plate 5 is used instead of the linear connecting member 4 'having the fixing plate 5' at the upper end.

  Thereafter, as shown in FIG. 18, the lid member 13 (or 9, 11, 12) is placed on the top of the uppermost tube column 3 so as to cover the upper end opening of the tube column 3, and is matched. By fastening the bolt 13 to the flange hole 7a and the bolt through hole 13c (or 9a, 11b, 12b) with a nut, the lid member 13 (or 9, 11, 12) is connected to the tube column 3, and eventually the steel assembly column 10 main body. Thus, the construction work of the steel assembly pillar 10 according to the present invention is completed. Incidentally, the code | symbol 23 in a figure has shown the mushroom type | mold GPS antenna.

  When the lowermost tube column 1 is installed directly on the roof surface or partially embedded in the ground to construct the steel assembly column 10, first, the fixing member is attached to the holding member 6. 5 '(5) is restrained through the lower end of the linear connecting member 4' (4) in a state where it is not mounted, and the upper part of the linear connecting member 4 '(4) is the lowermost column 1 It is pulled out from the upper end opening. Next, the work of drawing out from the upper end opening of the tube pillars 2 and 3 is sequentially performed while performing the work of adding the tube pillars 2 and 3. After completing the work of adding the uppermost column 3, the fixing plate 5 ′ (5) is attached to the upper end portion of the linear connecting member 4 ′ (4) drawn from the upper end opening of the tube column 3. Accordingly, the fixing plate 5 ′ (5) is engaged with the small diameter portion 3 a of the tube column 3. Thereafter, an operation of installing the lid member 13 on the top of the tube column 3 is performed. Since the linear connecting member 4 ′ (4) has such a rigidity that it can substantially maintain a vertical posture, even in such a case, a smooth operation can be performed.

Therefore, according to the steel assembly pillar 10 concerning this invention, there exist the following effects.
1) The fixing plate 5 (5 ′) provided at the upper end portion of the linear connecting member 4 (4 ′) does not play the role of the cover member 9 of the steel assembly column 10, and is the uppermost tube column. In order to prevent 3 from dropping, the steel assembly column 10 is fitted into the small diameter portion 3a of the uppermost tube column 3 of the main body 10 and is implemented. Therefore, since it is not necessary to apply a tension means in particular, the attaching operation can be performed smoothly and easily.
2) Since it is sufficient for the linear connecting member 4 (4 ′) to connect the pipe columns 1 and 3 in a loose state, the connecting operation is simple, and the linear connecting member 4 (4 ′) Damage and deterioration can be prevented as much as possible.
3) The lid 9 is not required to be attached by tensioning the linear connecting member 4 (4 ′) as in the background art, and is simply attached to the top of the uppermost tube column 3. Therefore, it is possible to employ attachment means that can reliably prevent the intrusion of rainwater or the like, for example, by providing the flange 7 on the outer periphery of the top end of the tube pillar 3. Moreover, the lid | cover material 9 ... rich in a variation can be employ | adopted.
4) In short, by making the supporting members (5, 6) for supporting the ends of the linear connecting members 4 dedicated members that do not serve as lid members for closing the ends of the steel assembly columns 10 The connecting structure of the linear connecting member 4 included in the steel assembly pillar 10 main body can be permanently protected from corrosion without applying tension means.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.

1, 2, 3 Tube pillar 3a Small diameter part 4, 4 'Linear connecting material 5, 5', 15, 25 Fixing plate 6 Holding member (bolt)
7 Flange 8 U bolt 9, 11, 12, 13 Lid material 10 Steel assembly pillar 14 Washer 16 Frame material (H-shaped steel)
17 Flat plate 18 Column support plate 19 Bolt 20 Mounting band 21 Scaffolding bolt mounting hardware 22 Wire

Claims (5)

In steel assembly pillars that are made by adding multiple pipe pillars so that some of them overlap,
The uppermost tube column has a small diameter portion formed by constricting a part of its upper portion in a concave shape to reduce the diameter, and an upper end portion of a linear connecting material for preventing fall is attached to the small diameter portion. A steel assembly column, wherein the fixing plate is fitted and fixed from above, and a lower end portion of the linear connecting member is attached to a holding member provided in a lowermost tube column.   The steel assembly column according to claim 1, wherein a U bolt is suspended from the fixing plate, and an upper end portion of the linear connecting member is attached to the U bolt.   The steel assembly column according to claim 1 or 2, wherein a flange is provided on an outer periphery of a top end portion of the uppermost tube column.   The steel assembly column according to any one of claims 1 to 3, wherein a lid member is provided on a top portion of the uppermost tube column.   The steel assembly column according to any one of claims 1 to 4, wherein the holding member is a bolt provided so as to penetrate in a radial direction of the lowermost column.

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