JPH0417259B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a joining device for structural members, and more specifically, it is possible to easily and firmly join a plurality of structural members such as long steel pipes to a node member at their tips. This invention relates to a device for joining. This is used in the field of joints when constructing truss structures.

[Prior art]

When constructing a large three-dimensional structure using a large number of structural members such as long steel pipes, the tips of each structural member are often joined to node members to form a truss structure. For example, in a factory building, several structural members can be joined to one polyhedral node member, and the joining is done by tightening bolts or the like. For example, several publications including Utility Model Publication No. 42-22992 have proposed joining devices having such a structure.

However, with these structures, the bolts cannot be sufficiently tightened when fixing the structural member to the node member. Taking the device disclosed in the above-mentioned publication as an example, a radial hole is made in the nut-shaped spanner engagement piece, and rotational force is transmitted through the hole and through the pin embedded in the bolt.
It is not possible to apply a large torque due to restrictions on pin strength. Furthermore, in general, joining devices do not have a structure that can easily absorb the tightening reaction force when tightening the joining bolt or nut, and therefore, it is not possible to apply sufficient torque. .
Moreover, they often have cross-sectional defects due to notches, holes, etc., and have the disadvantage that mechanical strength cannot be increased. In addition, a portion of the bolt thread, which is an important part in terms of strength, is exposed, so consideration for structural corrosion tends to be lacking. Therefore, the bolts used are required to have excessive strength and quality, resulting in high costs. Note that Japanese Patent Publication No. 56-29064 describes a method in which the connecting bolt is covered with a sleeve and the connecting bolt is rotated at the same time, but it has the following drawbacks. Although end members are often joined to the ends of long structural members by welding or the like, it is not always possible to obtain an accurate member length due to welding distortion. Since the end members have connection bolts etc. attached in advance, it is impossible to modify the dimensions after they are integrated with the structural members, and therefore it is impossible to absorb dimensional errors when assembling the truss. Otherwise, a dimensional adjustment mechanism is required to absorb it, which complicates the structure. Furthermore, it is not easy to enlarge the opening of a structural member or an end member integrated with the tip thereof, and there is a problem that surface treatment of a long member becomes difficult.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a structure that can strongly connect structural members to node members, avoid exposure of joint bolts and resist corrosion, and provide a dimension adjustment device. It is an object of the present invention to provide a joining device for structural members, which can be easily dimensioned without requiring any of the above, and has a simple and strong structure with no cross-sectional defects.

[Structure of the invention]

The features of the present invention will be explained below using FIG. 1 as an example.

An end member 4 is integrated at the end of each structural member 2, and a connecting bolt 6 is provided to connect the structural member 2 to a node member 3 in which a screw hole 5 is formed via the end member 4. 6 has boss part 1
4 is formed, and threaded portions 6A on both sides thereof,
6B is carved with a reverse thread, and the end member 4 has a reaction force absorbing portion 7 formed on the outer surface thereof, and an internal thread 9 having a diameter larger than the diameter of the nut 8 screwed onto the base side of the joint bolt 6. A support member 11 is fixed to the end member 4 and has a male thread 10 carved thereon and screwed into the female thread 9 thereof, and the shaft portion 6a of the joint bolt 6 is inserted through the center of the support member 11 to support it. A sliding hole 12 is formed. A sleeve body 15 is provided that engages with the outer surface of the boss portion 14 located outside the end member 4 to transmit rotation, while also allowing the boss portion 14 to slide in the axial direction. A rotational force acting part 16 for rotating the boss part 14 is formed in the .

[Effect]

The shaft portion 6a of the joint bolt 6 is inserted into the sliding hole 12 of the support member 11 from the base side, and the threaded portion 6 on the base side is inserted.
Screw nut 8 all the way to A. A joining bolt 6 is inserted through the opening of the end member 4 integrated into the end of each structural member 2, and the support member 11 is attached to the end member 4.
screw it into the female thread 9 of. After the support member 11 is fixed to the end member 4 and integrated, the sleeve body 1 is engaged with the outer surface of the boss portion 14.
5, and the tip of the threaded portion 6B of the bolt 6 is engaged with the threaded hole 5 of the node member 3. Sleeve body 15
The boss part 14 is rotated while applying rotation using a rotational force acting part 16 formed on the outer surface of the end member 4 and taking a reaction force with a reaction force taking part 7 formed on the outer surface of the end member 4. Since the boss portion 14 is integrated with the connecting bolt 6, the connecting bolt 6 rotates, and the threaded portion 6B of the bolt 6 advances into the screw hole 5 of the node member 3. At this time, the outer surface of the boss portion 14 is in engagement with the sleeve body 15, but relative displacement is possible in the axial direction, and advancement of the bolt 6 is not hindered. When the bolt 6 advances a predetermined distance, the nut 8 screwed into the bolt 6 comes into contact with the support member 11.
The threaded portion 6A of the nut 8 and the threaded portion 6B of the node member 3 are reverse threaded, so
By screwing into the node member 3, the nut 8
The biting between the nut 8 and the threaded portion 6A is facilitated.
does not come off from the threaded portion 6A, and further advancement of the joining bolt 6 is restricted.

In this way, the structural member 2 is joined to the node member 3 via the joining bolt 6, but in order to tighten the joining bolt 6, the reaction force absorbing portion 7 of the end member 4
A large torque can be easily applied using the . In addition, in the joined state, the sleeve body 15 is interposed between the end member 4 and the node member 3, so that exposure of the joining bolt 6 is avoided and the bolt threaded portions 6A and 6B, which are important in terms of strength, are Corrosion is suppressed.

[Examples] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 is an overall cross-sectional view of a joining device 1, in which the tip of a structural member 2 made of a long steel pipe or the like is radially joined to a node member 3. Describing the structure in order, a substantially conical end member 4 called an end cone is integrated with the end of the structural member 2 by welding or the like, and the structural member 2 is connected to the structural member 2 via the end member 4 to form a screw hole 5. A joining bolt 6 is provided to join the joint member 3 which is connected to the joint member 3. In this example, the end member 4 is composed of a conical portion 4a continuous with the structural member 2 and a hexagonal portion 4b formed at the tip thereof. The outer surface of the hexagonal portion 4b forms a reaction force absorbing portion 7, and a female thread 9 having a diameter larger than the diameter of the nut 8 screwed onto the base side of the connecting bolt 6 is cut inside the reaction force absorbing portion 7. Note that the shape of the end member 4 is not limited to that shown in the drawings, as long as it forms a female thread with the reaction force absorbing portion described above and exhibits the function described below.

A support member 11 having a male thread 10, which can be called a sleeve nut, is screwed into the female thread 9 of the end member 4, and the shaft portion 6b of the joining bolt 6 is inserted through the center of the support member 11 to support it. A sliding hole 12 is formed. After this support member 11 is screwed into the female thread 9, it is fixed to the end member 4, and its rotation is restrained by, for example, welding or a thread locking agent. By the way, support member 1
1 does not need to be completely housed in the end member 4 as shown in the figure, but may have any shape that supports the joint bolt 6 and does not inhibit the rotation of the sleeve body 15, which will be described later. In this example, in order to facilitate screwing the support member 11 into the female thread 9,
A recess 13 is provided for engaging a screwing tool.

The above-mentioned joining bolt 6 has a boss portion 14 formed approximately in the center thereof, and threaded portions 6A and 6B provided on both sides thereof are formed with opposite threads. A sleeve body 15 that engages with the outer surface of the boss portion 14 to transmit rotation and also allows the boss portion 14 to slide in the axial direction is provided on the outer surface of the sleeve body 15. A rotational force acting portion 16 is formed for this purpose. Note that although the boss portion 14 and the sleeve body 15 are usually hexagonal, the boss portion 14 may have other polygonal shapes such as a square, and the inside of the sleeve body 15 engages with the hexagonal shape. The outside may be of any structure as long as it can be rotated by using a spanner, for example, like the reaction force absorbing portion 7 of the end member 4 described above.

According to the embodiment with such a configuration, the joining device is formed as follows, and the structural member 2 and the node member 3 are connected.
It is possible to strengthen the bond with the

First, the end members 4 are integrated by welding or the like on both ends of the structural member 2 cut to a predetermined size. At this time, welding distortion occurs, which causes the dimensions of the structural member 2 to be deviated, but the end face of the end member 4 can be machined to a predetermined dimension. In addition,
There is no problem in making the female thread 9 slightly shorter. A female thread 9 is pre-engraved inside the hexagonal part 4b of the end member 4, but this part is in a relatively wide open state to prevent rust on the inner and outer surfaces of the structural member 2 including the end member 4. Surface treatments such as pickling, bonding of the base of the coating, baking painting, hot-dip galvanizing, etc. can be easily carried out.

Next, independently of the structural member 2, the supporting member 11
The shaft portion 6a of the joining bolt 6 is inserted into the sliding hole 12, and the nut 8 is fully screwed into the threaded portion 6A on the base side. The joining bolt 6 is inserted through the opening of the end member 4 integrated into the end of each structural member 2, and the support member 11 is screwed into the female thread 9 of the end member 4, as shown in FIG. Note that if most of the support member 11 enters into the end member 4, it will not be easy to rotate it, so in this example, a screw-in tool 17 shown by a phantom line is used, and its pawl is engaged with the recess 13. , which helps the rotation. The support member 11 is fixed to the end member 4 using an adhesive such as a screw lock or spot welding to achieve integration. In this state, the sleeve body 15 is fitted so as to be engaged with the outer surface of the boss portion 14, and the tip of the threaded portion 6B of the joint bolt 6 is engaged with the entrance of the threaded hole 5 of the node member 3 [see Fig. 1] ]. At this time, as shown in FIG.
and is set shorter than the distance l2 to the end surface of the sleeve body 15.

Finally, a spanner or the like is applied to the rotational force acting part 16 formed on the outer surface of the sleeve body 15 and the reaction force absorbing part 7 of the hexagonal part 4b of the end member 4 to apply rotation.
Rotate the boss portion 14. Since the boss portion 14 is integrated with the joint bolt 6, the joint bolt 6 rotates and the threaded portion 6B advances into the screw hole 5 of the node member 3. At that time, the outer surface of the boss portion 14 is
5 and can apply a large torque. On the other hand, since both can be relatively displaced in the axial direction, and the shaft portion 6b of the joint bolt 6 can slide on the support member 11, the advance of the bolt 6 into the node member 3 is not hindered. . When the bolt advances a predetermined distance, that is, the distance l1 mentioned above, the nut 8 of the joining bolt 6 comes into contact with the support member 11, as shown in FIG. A threaded portion 6A of the nut 8 and a threaded portion 6B of the node member 3.
Since it has a reverse thread, the engagement between the nut 8 and the threaded portion 6A will not loosen when the nut 8 is screwed into the node member 3, and further advancement of the joint bolt 6 is restricted. Ru. At this time, the boss portion 14
Although the boss portion 1 moves by a distance l1, the movement is shorter than the distance l2 to the end surface of the sleeve body 15.
4 will not come into contact with the node member 3 and impede the tightening of the joint bolt 6. In such a joint state, the sleeve body is interposed between the end member and the node member, and especially when used as a ceiling beam in a building such as the Metsuki factory,
Direct contact of the processing liquid vapor with the joint bolt can be avoided.

〔Effect of the invention〕

As described in detail in the above embodiments, the present invention is provided with a joint bolt that joins a structural member with an integrated end member to a node member, and the joint bolt is formed with a boss portion, and a boss portion is formed on the joint bolt. The threaded portions on both sides are reverse threaded, a reaction force absorbing portion is formed on the end member, and a female thread with a diameter larger than the diameter of the nut to be screwed into the base side of the joint bolt is carved into the end member. A support member is fixed to the end member, and a sliding hole is formed in the center of the support member for inserting and supporting the shaft of the joint bolt, and engages with the outer surface of the boss of the joint bolt to rotate. At the same time, a sleeve body is provided that allows the boss part to slide in the axial direction, and a rotational force acting part for rotating the boss part is formed on the outer surface of the sleeve body, so that the joint bolt can be tightened. Therefore, a large torque can be easily applied using the reaction force absorbing portion of the end member. Further, in the joined state, exposure of the joining bolt is avoided, and corrosion of the bolt thread part, which is important for strength, is suppressed. In addition, it is possible to have a configuration in which dimensions can be easily determined without requiring a dimension adjustment device, and surface treatment of the structural member is also facilitated. In addition, the joining bolts are not attached to the surface treatment of structural members, and the bolt strength is not reduced by plating, making it possible to use high-strength bolts that cannot be plated. effect is demonstrated.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a bonding apparatus according to an embodiment of the present invention, and FIGS. 2 to 4 are sectional views illustrating the states of each stage of the bonding operation. 2... Structural member, 3... Node member, 4... End member, 5... Screw hole, 6... Connection bolt, 6
A, 6B... Threaded part, 6a... Shaft part, 7... Reaction force absorbing part, 8... Nut, 9... Female thread, 10...
Male thread, 11...Support member, 12...Sliding hole, 1
4...Boss part, 15...Sleeve body, 16...Rotational force acting part.

Claims (1)

[Scope of Claims] 1. An end member is integrated at the end of each structural member, and a connecting bolt is provided to connect the structural member to a node member having a threaded hole through the end member. The connecting bolt is formed with a boss portion, and the threaded portions on both sides thereof are formed with reverse threads, and the end member is formed with a reaction force absorbing portion on the outer surface, and the connecting bolt is provided with a threaded portion on the base side. A support member having a female thread with a diameter larger than the diameter of the nut to be fitted is carved inside, and a male thread that is threaded into the female thread is fixed to the end member, and the center of the support member is provided with the connection bolt. A sleeve body is formed with a sliding hole for inserting and supporting the shaft part, and engages with the outer surface of the boss part located outside the end member to transmit rotation, while enabling the boss part to slide in the axial direction. What is claimed is: 1. A joining device for structural members, comprising: a sleeve having a rotational force acting portion formed on an outer surface of the sleeve for rotating the boss portion.