JP3511151B2 - Stud bracket - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stud fitting,
More specifically, it relates to a stud fitting which is welded to the outer surface of a steel structure and buried in the concrete to be used in a construction or civil engineering work so as to integrally bond a steel structure such as a steel frame with concrete. It is. 2. Description of the Related Art Conventionally, as this kind of stud fitting, what is generally called a reinforcing bar (deformed bar) stud or a stud with a head (shihel) has been frequently used. In the stud metal fittings which have been frequently used in the past, a metal bar itself embedded in concrete such as a reinforcing bar or a round bar is a stud, and an arc is generated between the stud and a steel structure as a base material. The stud was directly welded to the outer surface of the steel structure by an arc welding method. [0003] However, the conventional general stud fitting consisting only of a bar material such as a reinforcing bar as described above has a short welding length of the stud to the outer surface of the steel structure, and has a high bending strength. When the bending force acts on the stud in the welded state because of its low height, the stud is not only easily broken at the welded place, but also if you want to change the buried length in concrete according to various conditions, It is necessary to prepare multiple types of studs with different lengths, such as selecting the required length from different types of studs and welding, which contributes to the increase in construction cost. There was a problem of becoming. The present invention has been made in view of the above-described circumstances, and it is possible to increase the welding length, to perform a strong attachment with high bending strength, and to secure a large pull-out strength for concrete. It is an object of the present invention to provide a stud metal fitting that can be arbitrarily and easily changed in a concrete by simply preparing a kind of bar material. [0005] In order to achieve the above object, a stud fitting according to the present invention is provided at one axial end of a metal cylindrical member with a diameter larger than that of the cylindrical member. A flange capable of welding the outer peripheral surface to the outer surface of the steel structure is integrally fixed in a concentric manner, and a female screw is formed in a penetrating state on the inner peripheral surface of the cylindrical member including the flange over the entire length. The stud bracket main body, which has an outer peripheral surface having an outer peripheral length larger than the outer peripheral length of the flange portion, and the central portion thereof has the other end in the axial direction of the cylindrical member of the stud bracket main body. A hole that can be inserted and welded is formed, and a welding seat plate whose outer peripheral surface can be welded to the outer surface of the steel structure, and a flange portion of the stud bracket main body is welded to the outer surface of the steel structure. Is attached to the internal thread of the stud bracket body in the axial direction of the cylindrical member. When the welding seat plate welded to the other end of the cylindrical member is welded to the outer surface of the steel structure, the axial line of the cylindrical member can be connected to the female screw of the stud bracket main body. It is characterized in that it consists of a combination with a metal bar buried in concrete that can be screwed and connected from the other end side of the direction, and to attach a metal bar such as a reinforcing bar to a steel structure. The other end in the axial direction of the cylindrical member of the stud fitting body is inserted into the hole at the center of the welded seat plate and welded, and the welded seat plate is formed along the outer peripheral surface of the steel structure. After welding to the outer surface, the end of a metal bar such as a rebar is screwed into the female screw in the stud bracket main body and connected, or the flange of the stud bracket main body is connected to the outer surface of the steel structure along its outer peripheral surface. After welding, It is possible to arbitrarily select any attachment means for screwing and connecting the end of a metal bar material such as a reinforcing bar to the female screw in the head metal fitting body. By increasing the welding length to the outer surface of the structure, it is possible to obtain a strong mounting strength that will not break the welded part even if bending force is applied to the metal bar such as rebar after installation. A high pull-out strength can be obtained by the presence of the flange or the flange and the welded seat plate embedded in the concrete. Further, by adjusting the screwing amount of the metal bar such as a reinforcing bar into the female screw formed on the stud bracket main body, the embedding length of the metal bar such as the reinforcing bar in the concrete can be easily and arbitrarily adjusted. It is possible. Here, as a constituent material of the main body of the stud fitting, soft iron or stainless steel is generally used.
As the metal bar material, ordinary reinforcing bars, deformed reinforcing bars, and anchor bolts can be selectively used. Further, the welding of the flange of the welding seat plate or the stud fitting body to the steel structure is generally performed by fillet welding. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing constituent members of a stud fitting according to the present invention, and FIG. 2 is a longitudinal sectional view thereof. As is clear from these drawings, the stud fitting has a stud fitting main body 1 and a stud fitting main body 1. Welding seat plate 2 and reinforcing bar 3 as an example of a bar buried in concrete
It consists of a combination with [0008] The main body 1 of the stud fitting is provided at one axial end of a cylindrical member 4 made of soft iron or stainless steel.
A flange portion 5 having a circular outer peripheral surface 5a having a diameter larger than that of the cylindrical member 4 is integrally fixed in a concentric manner, and the inner peripheral surface of the cylindrical member 4 including the flange portion 5 extends over its entire length. The female screw 6 is formed so as to extend therethrough. The welding seat plate 2
Is a square outer peripheral surface 2 having an outer peripheral length larger than the outer peripheral length of the circular outer peripheral surface 5a of the flange portion 5 in the stud bracket main body 1.
and a circular hole 7 is formed at the center of the stud fitting main body 1 so that the other end of the cylindrical member 4 in the axial direction can be inserted thereinto and welded. The surface 2a can be welded to the outer surface of the steel structure.
In addition, the reinforcing bar 3 as the buried bar material has a deformed reinforcing bar 3A.
And a normal reinforcing bar 3B. At the ends thereof, a male screw 8 which can be screwed and connected to the female screw 6 of the stud bracket main body 1 is formed. Next, a steel structure A such as a steel frame is formed by using a stud fitting formed of a combination of each of the above-mentioned constituent members 1 to 3.
A description will be given of a construction example in which the concrete and the concrete C to be cast outside are integrally and strongly integrated. Application Example 1: As shown in FIG. 3, the cylindrical member 4 of the stud fitting main body 1 is inserted into a hole 7 at the center of the welding seat plate 2 of the stud fitting.
The other end in the axial direction is inserted and the periphery thereof is welded a to integrate the two 2 and 1 together, and the welded seat plate 2 is pressed against a predetermined portion of the outer surface Aa of the steel structure A, The stud fitting body 1 is attached to the outer surface Aa of the steel structure A by performing fillet welding b along the outer peripheral surface 2a of the square, and the female screw 6 of the cylindrical member 4 in the stud fitting body 1 is formed.
The male screw 8 at the end of the ordinary reinforcing bar 3B is screw-connected. Then, the concrete C is cast outside the steel structure A, so that the stud fitting main body 1 including the flange portion 5 and the welding seat plate 2 and the ordinary reinforcing bar 3B are buried in the concrete C, thereby forming the steel structure. A and concrete C are integrally joined with strength. Construction Example 2: As shown in FIG. 4, a flange portion 5 of a stud fitting is pressed against a predetermined portion of an outer surface Aa of a steel structure A, and a fillet weld b is formed along the circular outer peripheral surface 5a. By performing this, the stud fitting main body 1 is attached to the outer surface Aa of the steel structure A, and the male screw 6 of the deformed reinforcing bar 3A is screwed into the female screw 6 of the cylindrical member 4 of the stud fitting main body 1 and connected thereto.
Then, by placing concrete C outside the steel structure A, the stud fitting main body 1 including the flange 5 and the ordinary reinforcing bar 3B are buried in the concrete C, and the steel structure A and the concrete C Are integrally joined to each other. In the case of the above-mentioned construction example 1, the other end of the cylindrical member 4 in the axial direction of the cylindrical body 4 in the main body 1 of the stud metal body is connected to the main body 1 of the stud metal body by peripheral welding a with the central circular hole 7 being inserted. Along the rectangular outer peripheral surface 2a of the welding seat plate 2 integrated with high bending strength, and in the case of the construction example 2, the circular outer peripheral surface 5 of the flange portion 5 in the stud fitting main body 1
a, a steel structure A
The welding length to the outer surface Aa is increased to provide a strong mounting strength such that the welded portion is not broken even if a bending force acts on the reinforcing bar 3B or 3A after mounting, and the concrete C By adjusting the amount of screwing of the male screw 8 at the end of the reinforcing bar 3B or 3A into the female screw 6 in the tubular member 4 before casting, the length of the reinforcing bar 3B or 3A including the stud fitting in the concrete C can be easily increased. , And can be adjusted arbitrarily. In the case of construction example 1, the flange 5 of the main body 1 of the stud exerts a strong pull-out resistance while using the ordinary reinforcing bar 3B, and the steel structure A and the concrete C are integrally joined. In the case of the construction example 2, the use of the deformed reinforcing bar 3A exerts a large frictional force between the concrete C and the reinforcing bar 3A itself to secure a strong pull-out resistance. It is possible to increase the integral bonding strength between the object A and the concrete C. Incidentally, in the case of the above-mentioned construction example 1, the deformed reinforcing bar 3A
When using a strong pull-out resistance by the flange 5,
Due to the large frictional force generated between the deformed reinforcing bar 3A and the concrete C, it is possible to further increase the integral joining strength between the steel structure A and the concrete C. Further, in the above-described embodiment, the reinforcing rod is used as the metal rod material which is screwed and connected to the female screw 6 of the cylindrical member 4 in the stud fitting main body 1. It is also conceivable to use anchor bolts for fixing to C. In the above embodiment, the cylindrical member 4
In the above description, the flange 5 is integrally fixed only to one end in the axial direction. However, the flange 5 is integrally fixed to both ends of the cylindrical member 4 in the axial direction to form a circular shape on the side of the welding seat plate 2. The hole 7 may be formed in a size (diameter) in which the flange 5 can be inserted and welded. As described above, according to the present invention, the outer peripheral surface of the flange portion of the stud bracket main body or the welding seat plate prepared separately from the stud bracket main body is welded to the outer surface of the steel structure. By doing so, the welding length can be made longer than in the conventional case where the end of a metal bar (stud) is directly welded to the outer surface of a steel structure, and used by embedding in concrete. Even when the largest bending force is applied in this state, a strong mounting with high bending strength is obtained so that the welded part on the outer surface of the steel structure does not break, and the cylindrical shape of the stud bracket main body is obtained. By adjusting the amount of screwing of the male screw of the bar material such as a reinforcing bar with respect to the female screw formed on the member, just preparing a bar material of a certain length,
The embedding length of the bar in concrete can be easily and arbitrarily adjusted. Moreover, by using the flange portion or the flange portion and the welding seat plate together, even if a bar having a small surface area such as a normal reinforcing bar is used, the pull-out strength with respect to concrete can be increased, and the steel structure can be improved. In addition to the improvement of the mounting strength to the outer surface, it is possible to remarkably increase the integral bonding strength between the concrete and the steel structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a stud fitting according to the present invention. FIG. 2 is a longitudinal sectional view of FIG. FIG. 3 is a cross-sectional view of a main part showing Construction Example 1. FIG. 4 is a cross-sectional view of a main part showing Construction Example 2. [Description of Signs] 1 Stud bracket main body 2 Welding seat plate 2a Square outer peripheral surface 3 Reinforcing bar (metal bar) 3A Deformed bar 3B Normal reinforcing bar 4 Cylindrical member 5 Flange 5a Circular outer peripheral surface 6 Female screw 7 Circular center hole 8 Male screw A Steel structure C Concrete

Claims (1)

(57) [Claim 1] At one end in the axial direction of a metal cylindrical member,
A flange which is larger in diameter than the cylindrical member and whose outer peripheral surface can be welded to the outer surface of the steel structure is coaxially and integrally fixed, and the inner peripheral surface of the cylindrical member including the flange is A stud fitting body in which a female screw is formed in a penetrating state over the entire length, and an outer peripheral surface having an outer peripheral length larger than the outer peripheral length of the flange portion,
In addition, a hole that can be welded by inserting the other end in the axial direction of the cylindrical member of the stud bracket main body at the center thereof is formed, and the outer peripheral surface thereof can be welded to the outer surface of the steel structure. When welding the flange portion of the stud bracket main body to the outer surface of the steel structure, the stud bracket main body can be screw-connected to the female screw of the stud bracket main body from the other end side of the cylindrical member in the axial direction, Also,
When the welding seat plate welded to the other end of the cylindrical member is welded to the outer surface of the steel structure, it can be screwed into the female screw of the stud bracket main body from one axial end side of the cylindrical member and connected. stud fitting, characterized in that a combination of a metal rod that is embedded in and.