JP2597936B2 - Joining apparatus and joining method for structural member using solid material or thick tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining device and a joining method for a structural member using a solid material or a thick-walled tube, and more particularly, to a truss structure such as a large span structure or a tower-like structure. Apparatus and method for joining a structural member composed of a plurality of long solid sections having a solid cross section, such as a rod or a thick-walled tube, to an end member at an end thereof easily and firmly It is about.

[0002]

2. Description of the Related Art When a large span structure or a tower-like structure is constructed by using a large number of structural members such as long steel pipes, the ends of each structural member are joined to a node member and a truss member is formed. Often have a structure. In order to radially join several structural members to one node member forming a polyhedron, a displaceable joining bolt is used. However, it is not easy to sufficiently tighten the joining bolt when fixing the structural member to the node member. In addition, depending on the joining device, there is a cross-sectional defect due to a notch or an opening, so that a desired sufficient tightening torque cannot be applied or the mechanical strength of the joining device itself cannot be increased. is there. In addition, a part of the screw part of the joint bolt, which is an important part in the strength, is exposed,
In some cases, consideration for corrosion is lacking due to the structure of the joining device. As a result, excessive strength and quality are required for the joining bolts, and the joining apparatus is inevitably expensive. In order to solve such a problem, that is, the structure member can be strongly joined to the nodal member, the structure is hardly corroded by avoiding the exposure of the joint bolt, and the desired accurate dimensioning of the entire length of the structure member is performed. A bonding device having a simple and strong structure that is easy to perform and has no cross-sectional defects is disclosed in
No. 55347. Although the detailed description of this structure is omitted, the joining bolts are later attached to the cone-shaped end member welded to the end of the long structural member, so that the structural member can be accurately used in the finishing process of manufacturing. This makes it possible to set dimensions of a long length and to adjust the dimensions, which makes the joining apparatus extremely useful.

[0003] In joining the structural member to the joint member, it is necessary to align the tip of the joint bolt with the screw hole of the joint member. However, since the sleeve body covers most of the joining bolts due to the structure of the joining device, in the state before joining, the tip of the joining bolt must be protruded from the tip of the sleeve body by at least a length that can be called. Must. The protrusion amount is short, for example, 3 mm to 5 mm. However, as the space truss is assembled, the distance between the cores of the joint members is determined. Therefore, the projecting portion of the joint bolt protruding from the sleeve body is formed between the joint members. It hinders the work of interposing members. Therefore, the assembling sequence must be carefully considered, or a force must be applied to the assembled portion with a hydraulic jack, and the joints must be assembled while slightly expanding between the joint members. These operations are very time-consuming, and the preparation for them is very troublesome. In order to solve the above-mentioned problems, the present applicant has disclosed Japanese Patent Application Laid-Open
No. 51539 proposes a joining device that can push a joining bolt toward a structural member and completely retract it into a sleeve body. In this configuration, a spring is interposed at the back of the joint bolt located in the sleeve body, and the joint bolt can be retracted or restored by its elasticity. Japanese Patent Application Laid-Open No. 2-180003 discloses a joining device in which a screw instead of a spring is formed on a joining bolt so that the screw can be fed forward and backward by a sleeve body. And Japanese Utility Model Laid-Open No. 2-125102.
These have the advantage that the number of parts of the device is reduced, and compactness can be easily achieved.

[0004]

However, all of the joining devices proposed so far have a structure applied when a thin pipe such as a steel pipe is used as a structural member. On the other hand, it is well known that when a truss structure is assembled, the magnitude of the axial load acting on each structural member occurs, and in particular, in the case of a tower-like structure, a very large force is applied particularly to a column portion. Works. Therefore, if only thin-walled steel pipes are used, large-diameter joining bolts are required for structural members that exert a large axial load, and accordingly, large-diameter steel pipes must be used. In such a case, the thickness of the structural members in the truss structure becomes extremely uneven to impair the appearance, and when several structural members are radially joined to one node member, the joining devices having different sizes interfere with each other. And the joining becomes impossible. On the other hand, if a structural member such as a bar or a thick-walled tube with a solid cross section is employed as a structural member having the same proof stress as a large-diameter steel pipe, the cross-sectional dimension can be reduced. Can be solved. However, when joining a structural member using a solid material or a thick-walled tube to a joint member, adoption of a joining device having a displaceable joining bolt has hardly been performed so far. This is due to the fact that a compact joining device that can balance the very large sectional strength of a structural member such as a solid material has not been developed. Therefore, when it is necessary to employ a solid material or a thick-walled tube as a structural member, bolts are welded in advance to the ends of the solid material before shipment from the factory, and the node members are not incorporated in the truss structure. In the state, the node member is rotated and joined to the structural member. However, when joining with a node member that has already been joined with another structural member, the heavy and long structural member has to be rotated, which makes the truss assembly work at a high place extremely difficult. . In addition, it is almost impossible to rotate the structural member once incorporated in the truss structure, and it can be adopted at most in a truss structure having a small number of structural members. Therefore, in a large-scale truss structure requiring a large amount of structural members, solid materials, thick-walled tubes and the like are hardly adopted. The present invention has been made in view of the above problems, and an object of the present invention is to open the way to adopt a structural member using a solid material or a thick-walled tube for a truss structure, and to provide a structure of a compact joining device suitable for the truss structure. Proposal, and if a thin steel pipe is applied to a part where a very large force is applied, it will have to be a large-diameter structural member. A structure using a solid material or a thick-walled pipe that realizes the use of a large structural member and thereby suppresses the unevenness of the thickness of the structural members constituting the truss structure and improves the appearance. It is to provide a joining device and a joining method for a member.

[0005]

According to the present invention, a connecting bolt for connecting an end portion of each structural member and a node member is connected to an outer surface of a boss having a cross section larger than a diameter of a thread formed on the connecting bolt. In addition to the rotation of the sleeve body that transmits the rotation in combination and allows the boss portion to slide in the axial direction, the joining device of the structural member is configured to be able to be fed into the screw hole formed in the node member. Applied. 1 and 2, a screw hole 2a of the joint member 2 is provided on one side of the boss 4A of the joint bolt 4.
A connecting male screw 4a is formed on the other side of the connecting member. The connecting male screw 4a is formed in a reverse direction spiral having the same pitch as the connecting male screw 4a in the screw hole 3a provided at the end of the structural member 3 on the other side. Is formed. Male screw 4a for joining
The While screwing length L ₁ required for engagement with the threaded hole 2a of the joint member 2 is secured, the connecting male thread 4b, chewing the screw hole 3a provided at an end portion of the structural member 3 screwed necessary Ai length L ₂ is secured. The sleeve body 5 is formed from the total length L of the joining bolt 4 with the joining male screw 4
It is longer than the dimension obtained by subtracting the total length L ₂₂ of the connection the external thread 4b and the total length L ₁₁ of a. In addition, male screw 4b for connection
Is sufficient if it is set to about 1/2 of the cross-sectional dimension of the structural member 3. A sleeve body 5 engaged with the outer surface 4m of the boss 4A is provided at a portion of the boss 4A near the joining male screw 4a.
It is preferable to attach a falling-off prevention member 7 that can be broken or easily removed when the joining bolt 4 is rotated to join the structural member 3 and the node member 2 together.

[0006] In the present invention the bonding method, first, a connection external thread 4b, length approximately equal L _s to the length obtained by subtracting the threaded length L ₁ of the joining external thread 4a from the total length L ₂₂
It is engaged with the screw hole 3a formed at the end of the structural member 3 in advance. Next, the joining bolt 4 is slid and displaced while rotating by the rotation of the sleeve body 5, and the joining male screw 4 is rotated.
a is fed into the screw hole 2 a of the node member 2, and the connecting male screw 4 b is fed into the screw hole 3 a provided at the end of the structural member 3. One end 5a of the sleeve body 5 is in contact with the joint surface 2p of the node member 2, and the other end is the structural member 3
At the point of contact with the end face 3p of the.
In the truss construction method, a structural member 3 using a solid material or a thick-walled pipe is sequentially joined to a node member 2 using a joining device 1. After the distance between the centers of the joint members 2, 2 is determined, the joining bolts 40, 400 are provided between the joint members 2, 2.
(See FIGS. 7 and 9) can be retracted toward the structural members 30 and 300 and retracted into the sleeve members 50 and 500, and then the joining bolts 40 and 400 are connected to the sleeve members 5 and 500.
The joining device 10, which can be advanced from 0,500,
100, the structural members 30 and 300 using a hollow material or a thin-walled tube are sequentially joined.

[0007]

The screw hole 2a of the node member 2 is provided on one side of the boss 4A.
Bolt 4 formed with a connecting male screw 4a which meshes with the connecting bolt 4
Is engaged with the screw hole 3a provided at the end of the structural member 3 via the connecting male screw 4b provided on the other side. The sleeve member 5 is fitted to the boss 4A of the joining bolt 4, and the structural member 3 is carried to the joint member 2. The male screw 4a for joining faces the screw hole 2a of the node member 2 (see FIG. 3A), and the sleeve body 5 is rotated. At the same time as the connecting male screw 4a is fed into the node member 2, the connecting male screw 4b having the same pitch as the connecting male screw 4a in the reverse direction is also fed into the screw hole 3a of the structural member 3. The bonding male screw 4a, while the threaded length L ₁ required for engagement with the threaded hole 2a of the joint member 2 is secured, the connecting male thread 4b, a screw hole provided on the end portion of the structural member 3 since engagement screwed required length L ₂ of the 3a is secured, the amount engagement desired can be obtained by any of the infeed (see FIG. 3 (B)). When the distance between the node member 2 and the structural member 3 becomes equal to the length of the sleeve body 5, there is no further approach (see FIG. 3C). On the other hand, the length L _s of the sleeve body 5
Is longer than the dimension obtained by subtracting the total length L ₂₂ of the connection the external thread 4b and the total length L ₁₁ of bonding the external thread 4a from the total length L of the fastening bolt 4, it is possible to tighten the sleeve body 5. As a result, a joint state with sufficient proof stress is achieved even when a large axial force acts. Since the cross-sectional dimension of the structural member 3 may be about twice as large as the diameter of the connecting male screw 4b, the use of a solid material or a thick-walled tube results in a structural member having a smaller diameter than that of a hollow material or a thin-walled tube. In addition, the bonding apparatus 1 can realize a desired bonding mode with a large proof stress. When the drop-off preventing member 7 was attached to the portion of the boss 4A near the joining male screw 4a, the structural member 3 was engaged with the outer surface 4m of the boss 4A before the structural member 3 was carried to the position of the node member 2 in the truss space. The sleeve body 5 can be prevented from falling off. When the joining bolt 4 is rotated to join the structural member 3 and the node member 2, the falling-off preventing member 7 can be broken by the movement of the sleeve body 5 or can be easily removed by hand. It does not hinder work.

[0008] The structural member 3 when joined to the node member 2, the connection external thread 4b, only approximately equal amount to the length obtained by subtracting the threaded length L ₁ of the joining external thread 4a from the total length L _22, i.e., If the length L ₃ is previously meshed with the screw hole 3 a provided at the end of the structural member 3, while the male screw 4 a for joining is fed into the screw hole 2 a of the node member 2 by rotation of the sleeve body 5, The male screw 4b is the structural member 3
In the screw hole 3a. Even if there is a difference in strength in the material used between the node member 2 and the structural member 3,
Desired screwing of joining male screw 4a the connection male thread 4b and a length L ₁ and the length L ₃ + L ₁ is achieved, the node member 2
Thus, a large force can be introduced into the structural member 3. In the truss construction method, when a structural member 3 such as a solid material or a thick-walled pipe is sequentially joined to the node member 2 using the joining device 1, the core of the node member 2, 2 is defined by the length of the structural member 3. The distance is determined. Thereafter, the joining bolts 40 and 400 can retreat toward the structural members 30 and 300 and retreat into the sleeve bodies 50 and 500, and
After that, the joining bolts 40, 400 are connected to the sleeve body 50,
Joining devices 10 and 10 that can be advanced from 500
0, the structural members 30, 3 between the node members 2, 2
00 are sequentially joined. In this way, a bar having a solid cross section or a thick pipe close to the bar is joined by using an ultra-large diameter high-strength bolt, and these are attached to a place where a large axial force acts. On the other hand, the assembly work of the whole truss structure is easily performed by using a thin-walled pipe in a place where the axial force does not act greatly. Moreover, the thickness of the structural member does not become extremely uneven, and the appearance is improved. Furthermore, when a large number of structural members are radially joined to one node member, mutual interference of the joining devices 1, 10, and 100 is avoided, and a desired truss structure can be constructed.

[0009]

According to the present invention, since the connecting male screw for connecting to the node member is formed on one side of the boss portion of the connecting bolt and the connecting male screw for connecting to the structural member is formed on the other side, the solid body is solid. A material or a thick steel pipe can be adopted as the structural member. As a result, a welding operation or the like required when a solid material or the like is used becomes unnecessary, and the production of the structural member is simplified. Moreover, there is no need to rotate long and heavy structural members in the truss assembly work,
The joining operation becomes easy. If it becomes possible to adopt a middle shaft material or a thick-walled tube, it is possible to reduce the size of the structural member by using a member with a large cross-sectional strength, and to compare it with a hollow member or a thin-walled tube that is joined to other parts. The truss can be composed of items of uniform thickness, and its appearance is also improved. In addition, since the connecting male screw and the connecting male screw having the reverse screw configuration can be simultaneously fed into the node member and the structural member by using the sleeve body, the retightening by the sleeve body becomes more accurate, and the large tightening is performed. By forming a high-rigidity joint with torque,
A large axial force can be introduced to the structural member. The diameter of the male screw for connection can be as large as about 1/2 of the cross-sectional dimensions of solid materials and thick-walled pipes, so it is possible to use ultra-large diameter high-strength bolts as joining bolts and improve the strength of joining equipment. It is planned. Therefore, application to structural members requiring large proof stress, such as columns of tower-like structures, is promoted.
In addition, if a fall prevention member is attached to the portion of the boss near the joining male screw, the sleeve body engaged with the outer surface of the boss during transportation until the structural member is arranged in the truss structure under construction. Can be prevented from falling off.
This falling-off prevention member can be easily broken or removed when the joining bolt is rotated to join the structural member and the node member, and realizes a smooth joining operation.

According to the invention of the joining method, the joining operation can be performed quickly and surely, and the sleeve member is retightened to achieve a firm joining between the structural member and the node member. In the truss construction method, solid materials or thick-walled pipes are sequentially joined to the joint members by a joining device, and after the distance between the cores of the joint members is determined, the joint bolts are retracted into the sleeve body and advanced outside the sleeve body. Using a possible joining device, it is possible to join structural members of hollow material or thin-walled tube between the node members. Accordingly, a structural member having a relatively uniform thickness can be used for a truss structure such as a large span structure or a tower-like structure, and the appearance of the truss structure is improved. Not only that, the joining device is also made compact, so that mutual interference of the joining devices when joining several structural members to one node member is avoided, and a desired number of structural members can be arranged. Become.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a joining apparatus according to the present invention and a joining method using the same;
FIG. 2 shows two joint members 2 using joining devices 1 and 1.
FIG. 3 is an overall view of a state in which one structural member 3 is joined between two. The joining devices 1 are individually provided with joining bolts 4, and the joining bolts 4 can be engaged with the node members 2. The joining bolt 4 for connecting the node members 2 and 2 to the end of the structural member 1 includes a boss 4A having a hexagonal cross section larger than the diameter of the threaded portion, and engages with the outer surface to transmit rotation. , Its boss part 4
By the rotation of the sleeve body 5 which enables the sliding in the axial direction of A, the joining bolt 4 can be fed into the screw hole 2a formed in the node member 2. The structural member 3 is a thick-walled tube or a bar having a solid cross section. In the illustrated example, a member having a rectangular cross section is used as shown by a broken line. The joint member 2 is formed as a polyhedron capable of joining several structural members 3 and 3 radially, for example, by forming joining surfaces 2p and 2p at four peripheral places and front and rear faces. FIG. 1 is a longitudinal sectional view of a joining device 1 according to the present invention, which comprises a joining bolt 4 and a sleeve body 5. As the joining bolt 4, for example, an ultra-large diameter high-strength bolt suitable for joining a solid structural member 3 to a node member is employed. The joining bolt 4 is formed with a male screw having a diameter of about の of the cross-sectional dimension of the structural member 3 at the left and right ends thereof, and a boss 4A at a central portion thereof.

More specifically, the boss portion 4 of the joining bolt 4
On one side, that is, on the left side of A, a node member 2 (see FIG. 2)
The male screw 4a for joining screwed into the screw hole 2a is formed. On the other right side, the male screw 4a meshes with the screw hole 3a provided at the end of the structural member 3, and has the same pitch as the male screw 4a for joining in the opposite direction. A spiral connecting male screw 4b is formed. In addition, generally, a right-hand screw is attached to the male screw 4a for joining,
A left-handed screw is adopted as the connecting male screw 4b. Screw on its bonding male screw 4a, while the engagement threaded length L ₁ required for the screw holes 2a of the joint member 2 is secured, the connecting male thread 4b, provided at an end portion of the structural member 3 screwed necessary engagement between the hole 3a length L ₂ is secured. Therefore, the screw hole 3a of the structural member 3 is
The depth is sufficient for the engagement of b. The bonding male screw 4a, in order to ensure the screwing length L _1, includes a slightly longer overall length L ₁₁ than while connecting the male screw 4
b, in order to ensure the screwing length L _2, which is that the longer the total length L _22. The screwing length L ₁ of the joining male screw 4a described above, are shorter than the threaded length L ₂ of the connection the external thread 4b. This is generally because the material strength of the joint member 2 is higher than the strength of the structural member 3, it is based on it is preferable to lengthen the threaded length L ₂ of the connection the external thread 4b. By the way,
If such is not much difference in the strength of the structural member 3 and the node member 2 may be previously roughly equal to the screwing length L ₁ of the bonding male screw 4a screwing length L ₂ of the connection the external thread 4b. However, as described later, prior to bonding the structural member 3 to the node member 2, for a good idea to fit pre chewing some extent fastening bolt 4 to the structural member 3, the threaded length L ₂ of the connection the external thread 4b If you leave selected to be longer than the screwing length L ₁ of the joining male screw 4a, bonding work becomes smooth.

On the other hand, on the outer surface of the sleeve body 5, a rotational force acting portion 6 for rotating the boss portion 4A of the joining bolt 4 is formed in a hexagonal shape, and the inner surface is engaged with the outer surface 4m of the boss portion 4A. It has a hexagonal hole 5n that transmits rotation and can be displaced while the joining bolt 4 slides in the axial direction.
Then, the length L _s is the overall length L of the total length L ₁₁ between the connection male thread 4b of bonding the external thread 4a from the total length L of the fastening bolt 4
_It is slightly longer than the size obtained by subtracting ₂₂ .
The sleeve member 5 is fitted into the joining bolt 4 immediately before joining the structural member 3 to the joint member 2. By rotating the sleeve member 5, a part of the connecting male screw 4 b is previously inserted into the screw hole 3 a of the structural member 3. I try to engage. After the joining device 4 is attached to the end of the structural member 3, the whole is moved to a position where the node member 2 is located. At that time, considering that the structural member 3 may be in a non-horizontal state due to transportation or the like,
In order to prevent the sleeve body 5 from falling off from the joining bolt 4, a falling-off prevention member 7 is mounted. When the joining bolt 4 is rotated to join the structural member 3 and the node member 2, the falling-off preventing member 7 is easily broken or dropped by the relative displacement between the sleeve body 5 and the joining bolt 4. Therefore, the boss portion 4A is attached to a portion of the boss portion 4A near the joining male screw 4a. this is,
For example, it is sufficient if a short plastic pin 7a is employed and is pressed into a small hole provided in the boss 4A. Alternatively, a hole may be formed at a position 180 degrees apart from the boss portion 4A, and a C-shaped hook (not shown) may be hooked on the hole so that the sleeve body 5 comes off or can be easily removed by hand. Good.

By the way, as described above, the male screw 4 for joining is used.
the total length of a is set to L _11, the total length of the connection the external thread 4b also L ₂₂
Since there is a, when the fastening bolt 4 initially is attached to the structural member 3, the length L ₃ which is summed chewing the connecting male thread 4b screw hole 3a is, L ₂₂ -L ₁ or slightly shorter. The length L ₃ is chosen so as to be able to secure a sufficient connection strength to axial force desired from a large joint member 2 of the material strength after the truss structure is up set is transmitted to the structural member 3 . Incidentally, in the state of FIG. 1, the distance L ₄ to the one end 5a of the sleeve body 5 from the tip end of the bonding male screw 4a it is previously set to be twice the required screwing length L ₁ of the bonding male screw 4a. By doing so, one end 5a of the sleeve body 5 abuts on the joint surface 2p of the joint member 2 when the male screw 4a for joining is fed into the screw hole 2a of the joint member 2 by a desired amount. This is because the other end 5b of the body 5 can be brought into contact with the end face 3p of the structural member 3.

According to the above configuration, for example, the structural member 3 having a solid cross section of 150 mm square is
It can be joined to the node member 2 via a high-strength bolt 4 having a diameter of 5 mm. First, the joint bolts 4 and 4 are attached to both ends of the structural member 3 on the ground or the like of a truss construction site. At this time, joining the boss portion 4A of the bolt 4 is left rotated to the structural member 3 by hand, fit chewing the screw hole 3a of the connecting length for the external thread 4b L ₃ only structural member 3. Then, the sleeve body 5 is engaged with the outer surface 4m of the boss portion 4A,
The pins 7a for preventing falling off are set up. If the pin 7a has already been attached at the factory, the joining bolt 4 is attached to the structural member 3 after the sleeve body 5 is fitted to the boss 4A.
It should be attached to. The joint member 1 attached to both ends of the structural member 3 is the joint member 2 during truss construction.
The position of the connecting male screw 4a of the connecting bolt 4 is made to face the screw hole 2a of the node member 2 as shown in FIG. Then, a wrench or the like is applied to a hexagonal surface of the sleeve body 5 forming the rotational force application portion 6 shown in FIG. 3B, and the joining bolt 4 is rotated clockwise toward the node member 2 as shown by an arrow. Hexagon hole 5n
The joint bolt 4 is rotated by the rotation through the joint, and the joining male screw 4a is fed into the screw hole 2a of the node member 2, and at the same time, the connecting male screw 4 having the same pitch as the joining male screw 4a.
b is also fed into the screw hole 3a of the structural member 3. During this time, the joining bolt 4 is slid in the hexagonal hole 5n of the sleeve body 5 in the axial direction. That is, this rightward rotation is because the rotation of the connecting male screw 4b with respect to the structural member 3 is a leftward rotation as can be seen from the drawing. The feed amount of the connecting male screw 4a and the connecting male screw 4b are the same, and as shown in FIG.
When a is screwed length L ₁ necessary mutually biting into the screw hole 2a of the joint member 2, connecting external thread 4b will be the length of L ₃ + L ₁ is chewing summed.

The length L _s of the sleeve body 5 is
Since the full-length L is chosen somewhat longer than the dimension obtained by subtracting the total length L ₂₂ of the connection the external thread 4b and the total length L ₁₁ of the joining male screw 4a, sent a threaded length L ₁ than the fastening bolt 4 described above At this point, one end 5a of the sleeve body 5 comes into contact with the flat joining surface 2p of the node member 2, and the other end 5b comes into contact with the end surface 3p of the structural member 3. As shown in FIG. 1, since L ₂₂ -L ₃ is slightly longer than L ₁ , it does not happen that the connecting male screw 4b is caught before the sleeve body 5 hits the end face 3p of the structural member 3. . As can be seen from this, the length of the boss portion 4A does not need to be close to the length of the sleeve body 5 as shown in the figure, and the boss portion 4A is initially set when the joining bolt 4 is mounted on the structural member 3. As long as the sleeve body 5 can be engaged with the outer surface 4m of the sleeve, it may be short as shown by a two-dot chain line in FIG. In the state of FIG. 3C, when a large torque is applied to the sleeve body 5 to retighten, the structural member 3 is firmly joined to the node member 2 via the joining bolt 4, and as shown by an arrow in FIG. The assembling work can be sequentially advanced in one direction. By the way, as described later, the connecting members arranged in a row in this manner are used as a matrix, and a number of structural members such as steel pipes are joined to each of the joint members by using another type of joining device as shown in FIG. ,
A truss having a desired shape can be constructed. In addition,
As can be seen from the movements from (A) to (C) in FIG. 3, when the joint bolt 4 is fixed and viewed, the structural member 3 moves forward and the node member 2 moves backward, and the distance between the two. but the length L _s of the sleeve body 5. In practice, the position of the node member 2 is often fixed,
The structural member 3 moves with the rotation of. However, the structural member 3 is suspended by a crane or the like, and its movement is not hindered at all.

In the above description, the structural member 3 is a rectangle having a solid cross section and its upper and lower sides are horizontal (see FIG. 2). Good. The above-described joining device can be applied to a case where a thick tube is used as a structural member instead of a solid material.
Of course, the cross section may be circular, and in any case, it can be used for a structural member having a cross section dimension in the range of, for example, about 60 mm to 180 mm. / 2 can be given. As a result, a structural member having a solid cross section or the like has a very large cross-sectional proof stress, but a compact joining device corresponding thereto is realized. Therefore, if a thin steel pipe is applied to a portion where a large force acts, the outer diameter must be increased, but a structural member having a small cross section can be adopted despite its large proof strength. In other words, in the past, when trying to adopt solid materials, high-strength bolts had to be welded. However, it is only necessary to make threaded holes at the ends of the structural members. However, it is simple and easy to transport. Not only that, it is not necessary to rotate the long structural member itself in the joining operation with the node member, so that the joining operation is simplified, and it becomes extremely easy to apply a desired torque to the joining portion. . Incidentally, in the joining device, the shape of the boss formed on the joining bolt used in the joining device is not limited to the hexagonal cross section described above, and a polygon capable of transmitting torque can be adopted. In that case, the engagement hole formed in the sleeve body may be made to match the shape. Further, if the connecting male screw 4a and the connecting male screw 4b of the connecting bolt 4 are reverse screws having the same pitch, the diameters do not need to be the same. Therefore, a desired screw diameter can be selected in consideration of the size of the node member 2 and the cross-sectional dimensions of the solid material or the thick pipe.

FIG. 6 shows an example in which solid members or thick-walled structural members 3 and 3 are used for columns of a tower-like structure in the above-mentioned joining apparatus 1. A thick member in the figure is a solid cross section or a thick tube structural member 3, and a member shown in a thick or thin shape is a structural member 30 using a hollow material or a thin steel tube. The structural member 30 having a hollow cross section or the like is adopted in a place where a large force does not act in the truss structure, but is generally a pipe thinner than the structural member 3. In addition, after the structural member 3 having a solid cross section or the like is arranged, the center distance between the node members 2 and 2 located at both ends is often determined by the length of the structural member 3. However, the joining device 10 for the structural member 30
Is protruded from the sleeve body, and the structural member 30 cannot be fitted between the joint members 2. Therefore, as described in the prior art, the joining bolt can be pushed toward the structural member side and completely retracted into the sleeve body, as described in JP-A-63-51539. It is possible to use a joining device or to use a Japanese Utility Model Application Laid-Open No.
It is advisable to use the joining device proposed in Japanese Patent No. 5102.

The former has a structure as shown in FIG. 7, in which a spring 11 is interposed between the back of the joining bolt 40 located in the sleeve body 50, that is, between the boss 40A and the end face 30p on the side of the structural member 30. Let me. The joining device 10 is configured to be able to push the joining bolt 40 toward the structural member 30 by utilizing the elasticity of the spring 11 and completely retract the inside of the sleeve body 50. Therefore, as shown in FIG. 8, when the tip of the joining bolt 40 is brought into contact with the joining surface 2p, the spring 11 is contracted and the joining bolt 40 is retracted, so that the joining bolt 40 matches the screw hole 2a of the node member 2. When approaching, the joining male screw 40 a is restored by the elastic force of the spring 11. The tip is called into the screw hole 2a, and when the sleeve body 50 is rotated thereafter, the joining bolt 40 moves forward to achieve strong joining (see FIG. 7). Of the latter mentioned above, Japanese Utility Model 2-1800
In the case of Japanese Patent Publication No. 3 (JP-A) No. 3 (1993), a joining device 100 having a structure as shown in FIG. 9 is provided. Before carrying the structural member 300 to the node member, the sleeve body 500 is reversely rotated to retract the joint bolt 400, and after the joint bolt 400 is exposed to the screw hole of the node member, the sleeve body 500 is rotated forward. , The joining bolt 40 advances, and a strong joining is achieved. Actual Kaihei 2
Although the introduction of the structure of the joining apparatus in JP-A-125102 is omitted, the detailed description of any type of joining apparatus should be referred to the respective publications. Since these allow the structural members to be arranged after the center distance between the two node members is determined, a solid material or a thick steel pipe can be formed using the joining device 1 as shown in FIG. Problems caused by the connection can be solved. In this way, the entire truss structure as shown in FIGS. 5 and 6 can be assembled.

FIG. 10 shows the support points 13, 1 of the truss structure.
FIG. 11 is a plan view in a case where support points 14 and 14 are present only at four corners. Incidentally, FIGS. 12 and 13 show a front view and a side view of FIG. The portions indicated by two lines in the drawing are the structural members 3 using a solid material or a thick tube, and the portions indicated by a single line are the structural members 30 or 300 using a hollow material or a thin tube. In each of these cases, the stress acting on the structural member 3 indicated by the double line becomes extremely large as compared with the structural members 30 and 300 at other locations. Therefore, when it is not preferable to make the diameter of the structural member 3 too large in terms of design, that is, such a case is common. However, the joining apparatus according to the present invention and the solid material or the thick pipe are used. A structural member is used. Large joint bolts are required at the joints where large forces are applied, but if you try to join hollow materials or thin-walled pipes with a joining device that uses them, the diameter of the structural members will become increasingly larger Will not get. And
When a large number of structural members are radially joined to one node member as shown in FIG. 5, a situation occurs in which the joining device interferes and cannot be mounted. However, if a solid member or a structural member using a thick-walled tube is used, the joining device can be made compact, and such a situation can be avoided. From the above description, it is sufficient that the diameter of the structural member is about twice as large as the diameter of the threaded portion of the joining bolt, so that a joining bolt having a sufficiently large proof stress can be used even in a very compact cross section, that is, a solid material. It will be appreciated that it can be incorporated via Such a solid member or a thick steel pipe structural member and a joining device therefor are preferably applied to, for example, columns of a tower-like structure where a very large force acts. When used together with a structural member using a truss structure, unevenness in the thickness of the structural member employed in the truss structure is reduced, and the appearance is improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a bonding apparatus according to the present invention.

FIG. 2 is an overall view of a state where a structural member is joined to a node member.

3A is an operation explanatory diagram when the joining bolt is in a state immediately before being engaged with the node member, and FIG. 3B is an operation diagram when the joining bolt is engaged halfway by rotating the sleeve body. (C) is a joining state diagram after the structural member is completely joined to the node member by the joining device.

FIG. 4 is a joining state diagram in a case where structural members using a bar or a thick steel pipe having a solid cross section are connected so as to extend in one direction.

FIG. 5 is an enlarged view in the vicinity of the node member when a structural member such as a solid material and a structural member such as a thin tube are radially joined to one node member.

FIG. 6 is a partial view of a truss structure when a structural member such as a solid material is applied to a pillar of a tower-like structure.

FIG. 7 is a configuration sectional view of a joining device in which joining bolts can be advanced and retracted by expansion and contraction of a spring.

FIG. 8 is a configuration explanatory view showing a state in which the joining bolt is retracted into the sleeve body.

FIG. 9 is a cross-sectional view of the configuration of a joining device in which a joining bolt can be advanced and retracted by screws formed on the joining bolt.

FIG. 10 is a plan view of a truss structure in which support points are provided on both sides, illustrating a mounting position of a structural member using a solid material or a thick-walled pipe.

FIG. 11 is a plan view of a truss structure in which the support points are at four corners, illustrating a mounting position of a structural member using a solid material, a thick pipe, or the like.

FIG. 12 is a view taken along line AA of FIG. 10;

FIG. 13 is a view taken along line BB of FIG. 10;

[Explanation of symbols]

1, 10, 100: joining device, 2: joint member, 2a: screw hole, 2p: joining surface, 3, 30, 300: structural member, 3
a ... screw hole, 3p ... end face, 4 ... joining bolt, 4A ... boss, 4m ... outer surface, 4a ... joining male screw, 4b ... connection male screw, 5 ... sleeve body, 5a ... one end, 5b ... other end,
7: fall-off prevention member, 11: spring, 12: screw, L
... Length of joint bolt, L ₁ ... Length of screw required for meshing of connecting male screw with screw hole of node member, L ₂ ... Matching of male screw for connection with screw hole provided at end of structural member Length required for screwing, L ₁₁ … Length of male screw for joining, L
₂₂ … Length of the male screw for connection, L ₃ (≒ L ₂₂ −L ₁ )… Length of the male screw for connection being initially engaged in the screw hole, L _s …
Total length of sleeve body.

Claims (5)

(57) [Claims] 1. A joint bolt for connecting an end of each structural member and a node member is engaged with an outer surface of a boss having a cross section larger than a diameter of a thread formed on the joint bolt to transmit rotation. A joint device for a structural member which is capable of being fed into a screw hole formed in the node member by rotation of a sleeve body which enables the boss portion to slide in the axial direction, and wherein the boss of the joint bolt is provided. One side of the portion is formed with a joining male screw that meshes with the screw hole of the node member, and the other side meshes with a screw hole provided at the end of the structural member and has the same pitch as the male screw for joining. A connecting external screw having a reverse spiral is formed. The connecting male screw secures a screwing length (L ₁ ) necessary for meshing with the screw hole of the node member,
The connecting male screw secures a screw-in length (L ₂ ) necessary for meshing with a screw hole provided at an end of the structural member, and the sleeve body is formed from the total length (L) of the joining bolt. A structural member using a solid material or a thick-walled tube, wherein the length is set to be longer than the length obtained by subtracting the total length (L ₁₁ ) of the male screw for connection and the total length (L ₂₂ ) of the male screw for connection. For bonding equipment. 2. The connecting male screw according to claim 1, wherein a diameter of the connecting male screw is approximately の of a sectional dimension of the structural member.
A joining device for a structural member using a solid material or a thick-walled tube described in (1). 3. A portion of the boss portion near the joining male screw for preventing the sleeve body engaged with the outer surface of the boss portion from falling off and joining the structural member and the node member. 2. A structural member using a solid or thick-walled tube according to claim 1, wherein a falling-off preventing member which can be broken or easily removed when the joining bolt is rotated is attached. For bonding equipment. 4. The joining device for a structural member using a solid material or a thick-walled tube according to claim 1, wherein the connecting male screw is screwed in from the entire length (L ₂₂ ). The screw is formed in advance in a screw hole formed at the end of the structural member by a length (L _s ) substantially equal to the length obtained by subtracting the length (L ₁ ), and the joining bolt is rotated by rotating the sleeve body. The sliding male screw is fed into the screw hole of the joint member, and the male screw for connection is sent into a screw hole provided at an end of the structural member. A method of joining a structural member using a solid material or a thick-walled pipe, wherein the member is further tightened when it comes into contact with a joining surface and the other end comes into contact with an end surface of the structural member. 5. A structural member using a solid material or a thick-walled tube is sequentially joined to a node member by using the joining device according to claim 1, and after the center distance of the node member is determined, Between the joint members, the joining bolt can be retracted to the structural member side and retracted into the sleeve body, and thereafter, a joining device capable of allowing the joining bolt to advance from the sleeve body, using a hollow material or a thin-walled tube. A truss construction method for a large span structure or a tower-like structure, wherein members are sequentially joined.