JPS61261545A - Screw joint for structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the structural technology field of screw joints used in joints of space trusses of architectural structures and the like.

Therefore, in this invention, a bolt to be screwed into a connecting part of the main aggregate is installed in a joint frame which is connected to the secondary aggregate by welding or the like, and the shank of the bolt is connected to the main aggregate side of the joint frame. The present invention relates to a threaded joint for structures, which is inserted into the end portion of the bolt so as to be movable forward and backward, and the head of the bolt can be engaged with and retracted from a stopper formed on the joint frame, and in particular, the bolt head has a threaded portion formed therein. The base of the bolt shank is formed to have a polygonal cross section such as a hexagon, and is screwed into a threaded portion formed on a bolt support installed in the joint frame. The sleeve is interposed between the joint frame and the sleeve so as to be movable axially. This invention relates to a threaded joint for a structure that is rotatable in synchronization.

<Prior art> Recently, when assembling a three-dimensional truss structure such as a three-dimensional building structure, each aggregate is formed into a predetermined shape and size in advance, and the rigid joints of each aggregate are formed at the construction site. The construction method of constructing the three-dimensional truss structure by connecting the sections through screw joints is often adopted due to its advantages such as shortening construction period and ease of construction work.

And, for the screw joints for the above structures,
Structures disclosed in Japanese Patent Publication No. 2992 or Japanese Patent Publication No. 54-25993 have been devised.

That is, in the threaded joint disclosed in Japanese Utility Model Publication No. 42-22992, a bolt is inserted into the end of the sub-aggregate so that it can move forward and backward, and the shank of the bolt is screwed into the shank. The assembled nut is attached through the pin and the guide hole so as to be rotatable in synchronization, and the nut is rotated to screw the bolt shank into the female thread formed in the rigid section of the main aggregate. The head of the bolt is hooked to a stopper at the end of the secondary aggregate to connect the secondary aggregate to the main aggregate.

Furthermore, the threaded joint disclosed in Japanese Patent Publication No. 54-25993 has a stud bolt inserted into the end of the secondary aggregate so that it can move forward and backward in advance, and then screwed into the stud bolt and fixed. The nut is covered with a sleeve that matches the shape of the nut, the sleeve is rotated, the bolt shank is screwed into the female thread formed in the rigid joint of the main aggregate, and the secondary aggregate is attached to the main aggregate. are connected.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional threaded joint for structures, in the case of the threaded joint disclosed in Japanese Utility Model Publication No. 42-22992, a bottle fastener is attached to the bolt shank. It is necessary to form a hole for the bottle for installation, and a guide hole for the bottle must also be formed in the nut, which has the disadvantage of poor strength.

In addition, in the case of the threaded joint disclosed in Japanese Patent Publication No. 54-25993, as a means for fixing a nut to a stud bolt, the pitch of the threads is made different on the base side and the tip side of the stud bolt. However, the manufacturing of threaded joints is extremely complicated, as the stud bolt is threaded at the same pitch over the entire length of the bolt, and the nut is fixed by welding after screwing.Moreover, it is difficult to set the fixing position of the nut, and its setting is difficult. Depending on the position, it may be necessary to initially feed the stud bolts before connecting the secondary aggregate to the main aggregate, which poses a problem in that the workability of assembly is extremely poor.

The purpose of the present invention is to solve the problems of the above-mentioned conventional screw joints for structures, and to assemble a robust structure that has a simple structure, is easy to assemble, improves workability, and is easy to assemble. It is an object of the present invention to provide an excellent screw-in joint for structures that is useful for the field of application of three-dimensional truss structure technology in various structure construction industries.

Means and operation for solving the above-mentioned problems In accordance with the above-mentioned object, the structure of the present invention, which is summarized in the above-mentioned claims, is to solve the above-mentioned problems. A bolt is installed inside the joint frame connected to the secondary aggregate by welding or the like, a threaded part is formed by extending a male thread to the head of the bolt, and the threaded part is installed inside the joint frame. The shank of the bolt is screwed into the provided bolt support, and the cross-sectional shape of the shank base of the bolt is formed into a polygonal shape such as a hexagon, so that the shank can freely move forward and backward from the end of the joint frame on the main aggregate side. At the same time, the sleeve is inserted between the main aggregate and the joint frame so that it can move forward and backward in the axial direction, and the internal cross-sectional shape of the sleeve matches the cross-sectional shape of the base of the bolt shank. By aligning the sleeve and the bolt shank, the sleeve and the bolt shank are rotatable in synchronization, and the sleeve is brought into contact with the joint of the main aggregate and rotated, so that the male thread at the tip of the bolt shank is screwed into the joint. The bolt head is moved forward, and the bolt head is engaged with a stopper installed inside the joint frame, and the secondary aggregate is fastened to the main aggregate via the bolts covered in the sleeve. It makes it easier to assemble each aggregate and improves the workability of on-site assembly work.As a result, it becomes possible to shorten the construction period.Furthermore, the strength of the joints is improved, making it possible to construct a robust structure. It took technical measures to achieve this goal.

<Embodiment - Configuration> Next, one embodiment of the present invention will be described below based on the drawings.

In Fig. 1, reference numeral 1 denotes a structural screw joint, which is used at the joint between the main aggregate and the secondary aggregate assembled to the main aggregate when assembling the aggregate of a building structure with a three-dimensional truss structure. In this embodiment, the threaded joint 1 is connected to a joint frame 2.
It is composed of a bolt 3 that is installed inside the bolt 3 and a sleeve 4 that is externally wrapped around the bolt 3.

The bolt 3 has a bolt shank 6 extending from one end of a cylindrical bolt head 5, and the bolt shank 6 has a base 1 having a hexagonal cross section and a tip 8 having a male thread. On the other hand, at the other end of the bolt head 5, a male thread 9 serving as a threaded portion is formed to have the same thread shape, the same diameter, and the same pitch as the male thread at the tip 8 of the bolt shank 6, and extends therefrom.

Moreover, the joint frame 2 is formed into a substantially truncated conical shape on the outside,
The base, which is the expanding side, is welded and fixed to the secondary aggregate 10, and on the inside of the base, nuts 11 as bolt supports are inserted through ribs i2, 12... The bolt 3 has a male thread 9 screwed onto the nut 11, and the bolt shank 6 is movable forward and backward relative to the narrow end of the joint frame 2.
In addition, the bolt head 5 is rotatably inserted into the interior, and the bolt head 5 can be engaged with and separated from a stopper 13 formed at the tip of the joint frame 2.

Furthermore, the sleeve 4 is interposed between the joint surface 15 of the joint part 14 of the main aggregate and the tip of the joint frame 2, and is covered with the bolt shank 6, and the sleeve 4 is shown in FIG. The bolt shank 6 is formed to have a hexagonal cross-section, and its inner cross-sectional shape is matched with the cross-sectional shape of the base 7 of the bolt shank 6, so that the bolt shank 6 can freely move forward and backward into the sleeve 4, and can prevent relative rotation. It is restrained and only synchronous rotation is allowed.

Incidentally, the connecting portion 14 of the main aggregate is provided with a female thread 16, into which the male thread of the tip 8 of the bolt shank 6 is screwed. The diameter and the end face diameter of the tip of the joint frame 2 are made the same as the cross-sectional diagonal length of the base 7 of the bolt shank 6, and the appearance is improved when the secondary aggregate is assembled to the main aggregate. It's like that.

Furthermore, the sleeve 4 is provided with a peephole 17, as shown in FIG. In this case, the dimensions are set so that the end face of the tip 8 of the bolt shank 6 and the end face on the side of the connecting part 14 of the main aggregate of the sleeve 4 are flush with each other, and the secondary aggregate is assembled to the main aggregate. In this case, there is no need to initially feed the bolt 3.

<Embodiment - Effect> In the above structure, as shown in FIG.
The sleeve 4 is rotated to cause the bolt 3 to rotate synchronously and to be screwed into the female thread 16 of the coupling portion 14.

In addition, at the initial stage of bolt tightening, the male thread 9 of the bolt 3 is screwed into the nut 11 installed inside the joint frame 2, so the bolt 3 moves forward along the same axis, and the tip of the bolt 3 8 and the female thread 16 of the coupling portion 14 can be easily aligned.

When the bolt 3 moves forward by a predetermined distance, the male thread 9 separates from the nut 11. When the bolt 3 is moved further forward and the bolt head 5 is engaged with the stopper 13 at the tip of the joint frame 2, the main aggregate and the secondary aggregate are separated. is securely tightened by the bolt 3 with the sleeve 4 sandwiched therebetween.

Incidentally, the tightened state of the bolt 3 can be directly confirmed by the operator through the peep hole 17.

Other Embodiments> It goes without saying that the embodiments and aspects of this invention are not limited to the above-mentioned embodiments, and the threaded portion formed on the bolt head may be formed with a male thread directly on the outer periphery of the bolt head. Alternatively, it is possible to employ a number of other embodiments in which a female thread serving as a threaded portion is formed on the bolt head, and a male thread that engages with the female thread is formed on the bolt support.

<Effects of the Invention> As described above, according to the present invention, the bolts to be screwed into the joints of the main aggregates are internally installed in the joint frame of the threaded joint connected to the secondary aggregates, and the bolts installed internally in the joint frame are A threaded portion that is screwed into the bolt support is formed on the head of the bolt, and the cross-sectional shape of the shank base of the bolt is formed into a polygonal shape, so that the shank can freely move forward and backward toward the main aggregate side end of the joint frame. At the same time, the sleeve is inserted between the main aggregate and the joint frame so as to be able to move forward and backward in the axial direction. By aligning the sleeve and the bolt shank so that they can rotate in unison, the bolt can be easily fed into the main aggregate by the rotation of the sleeve, and the main aggregate and secondary bone of the structure can be easily fed into the main aggregate. Assembling the materials becomes easier and has the advantage of shortening the construction period.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view of a threaded joint for structures before tightening, FIG. 2 is a sectional view equivalent to FIG. 1 after tightening, and FIG. 2 Figure 111-1 sectional view, Figure 4 is Figure 2 rV-rV sectional view, Figure 5 is Figure 2 v
−■ It is a sectional view. 14...Joint part, 3...Bolt, 10...
Secondary aggregate, 2... Joint frame, 6... Bolt shank, 5... Bolt head, 13... Stopper, 1... Threaded joint, 11... Bolt support, 9
...Threaded part, 1...Bolt shank base, 4.
··sleeve

Claims (1)

[Claims] A bolt that is screwed into the joint of the main aggregate is installed in a joint frame that is connected to the secondary aggregate, and the shank of the bolt is inserted into the main aggregate side end of the joint frame so that it can move forward and backward. In a threaded joint for structures in which the head can be freely engaged and separated from a stopper formed on a joint frame, a threaded portion is formed on the bolt head to be threaded into a bolt support built into the joint frame, and the bolt shank The base is formed to have a polygonal cross-section, and is covered with a sleeve that is interposed between the connecting portion of the main aggregate and the joint frame so as to be able to move forward and backward in the axial direction, and the inner cross-sectional shape of the sleeve is shaped like that of a bolt shank. A threaded joint for a structure, characterized in that the sleeve and bolt shank are rotatable in synchronization by matching the cross-sectional shape of the base.