JP3036668U - Steel pipe joint structure - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a joint structure of a steel pipe having good workability, in which upper and lower steel pipe columns are loosened and securely joined without coming off without damaging the landscape. SOLUTION: The upper and lower steel pipe members 1 and 2 are provided with annular steel pipe splicing portions 3 and 4 surrounding the outer peripheral surfaces of the respective members, and a semicircular annular concave portion 6 is provided at a portion corresponding to the steel pipe splicing. Embracing the semi-cylindrical splicing block 5 of the above across both steel pipe members,
The concave portion 6 and the steel pipe splicing portion were engaged with each other, and tightened with a PC steel rod 7 surrounding the steel pipe member.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a joint structure for steel pipes.

[0002]

[Prior art]

 The conventional steel pipe joint structure is constructed by welding flanges provided at the joints of upper and lower steel pipes or by bolting.

[0003]

[Problems to be solved by the device]

 However, since the above-mentioned conventional steel pipe joint structure is flange joint, the flange portion protrudes to the outside of the steel pipe and spoils the scenery, and the bolt joint requires a large number of bolts to be joined, which requires a lot of time and labor at high places. It was dangerous. The present invention has been proposed in view of the above-mentioned problems of the prior art. The purpose of the present invention is not to damage the landscape, the on-site joining work can be easily and easily performed, and the upper and lower steel pipe columns can be securely attached without loosening. The point is to provide a joint structure of steel pipes to be joined.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the steel pipe joint structure according to the present invention, an annular steel pipe splicing portion that surrounds the outer peripheral surface of each steel pipe member is provided in the vicinity of each joint end of the upper and lower steel pipe members. A pair of semi-cylindrical splicing blocks, each having a semi-circular ring-shaped recess on the inner surface of the steel pipe splicing part, are attached to the upper and lower steel pipe members, and the semi-circular shape of the splicing block is attached. The annular recesses are engaged with the respective steel pipe splicing portions of the upper and lower steel pipes, and the PC steel rods surrounding the respective steel pipe members are inserted into a pressure plate projecting from the steel pipe members and are tightened and fastened. It is configured.

[0005]

[Embodiment of the invention]

 Hereinafter, the present invention will be described with reference to the most preferred embodiment of the present invention shown in the drawings. Reference numeral 1 is an upper steel pipe member, 2 is a lower steel pipe member, and annular steel pipe splicing portions 3 and 4 surrounding the outer periphery of each steel pipe member are provided in the vicinity of respective joints of the upper and lower steel pipe members.

Reference numeral 5 denotes a pair of semi-cylindrical splicing blocks, each of which has a semi-circular annular recess 6 formed at a corresponding portion of the steel pipe splicing portions 3 and 4. Thus, a pair of semi-cylindrical attachment blocks 5 are held over the joints of the upper and lower steel pipe members 1 and 2, and the semi-circular annular recesses 6 provided in the respective cylindrical attachment blocks 5 are described above. The steel pipe splicing parts 3 and 4 projecting from the upper and lower steel pipe members 1 and 2 are engaged with each other, and the PC steel rod 7 is wound and tensioned from the outside of each of the semi-cylindrical cylindrical splicing blocks 5 to form the steel pipe member. It is fixed to the bearing plate 8 protruding from the radial direction 1, 2.

In the figure, 9 is a PC steel rod fixing side head which is penetrated through a through hole provided in the pressure bearing plate 8, and 10 is a PC steel rod tightening side bolt and nut. In the figure, 11 is a draining flange. Since the illustrated steel pipe joint structure is configured as described above, the annular steel pipe splicing portions 3 and 4 surrounding the outer peripheral surfaces of the upper and lower steel pipe members 1 and 2 and the upper and lower steel pipe members 1 and 2 are bonded together. The force is smoothly transmitted between the upper and lower steel pipe members 1 and 2 by meshing with the respective semi-cylindrical recesses 6 provided on the pair of semi-cylindrical splicing blocks 5. Further, since the respective steel pipe members 1 and 2 are tightened by the PC steel rod 7, the joints between the steel pipe members 1 and 2 are not loosened or come off.

[0008]

[Effect of the invention]

 In the steel pipe joint structure according to the present invention, as described above, an annular steel pipe splice contact portion surrounding the outer peripheral surface of each member disposed near each joint end of the upper and lower steel pipe members, and the upper and lower steel pipes. By engaging the recesses provided in the pair of semi-cylindrical splicing blocks that hold the members together, the on-site joining work of the upper and lower steel pipe members can be easily performed, and the force transmission can be smoothly performed, and The outer surface of the steel pipe does not have large protrusions like conventional flanges, and does not spoil the landscape.

Further, according to the present invention, a PC steel rod surrounding each of the steel pipe members is inserted into a bearing plate projecting from the steel pipe member and tension-fixed, whereby slack or detachment occurs at the joint between the upper and lower steel pipe members. Never occur.

[Brief description of the drawings]

FIG. 1 is a front view showing a joint structure for a steel pipe according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional view showing a steel pipe joint end portion.

FIG. 5 is a vertical sectional view of a semi-cylindrical splicing block.

[Explanation of symbols]

 1 Upper steel pipe member 2 Lower steel pipe member 3 Steel pipe splicing part 4 Steel pipe splicing part 5 Semi-cylindrical splicing block 6 Semi-annular recess 7 PC steel rod 8 Bearing plate 9 PC steel rod fixed side head 10 PC steel rod tightening Attached side bolts and nuts

Claims (1)

[Utility model registration claims] 1. An annular steel pipe splicing part that surrounds the outer peripheral surface of each steel pipe member is provided in the vicinity of each joint end of the upper and lower steel pipe members, and the corresponding portion of the steel pipe splicing part is provided on the inner peripheral surface. A pair of semi-cylindrical splicing blocks provided with semi-circular recesses are attached to the upper and lower steel pipe members, and semi-circular recesses of the splicing block are joined to the steel pipe splicing parts of the upper and lower steel pipes. , A PC steel rod surrounding each of the steel pipe members is inserted into a bearing plate protruding from the steel pipe member, and tension is applied,
Steel pipe joint structure characterized by being tightened.