JPH0724482Y2 - Anchor bolt for mounting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt for mounting which becomes an insert for concrete.

[0002]

2. Description of the Related Art Generally, as anchor bolts for construction, anchors for mounting PC version fasteners, anchors for mounting equipment, signboards, etc., anchors for column bases of steel columns, anchors for hybrid concrete curtain wall, etc. Various uses are known. In this case, the conventional anchor
The structure of the bolt is a bolt shaft structure in which the tip portion is bent at a right angle, and the hooked portion side is embedded in concrete. For example, as shown in FIG. 6, the PC plate fastener attachment anchor has a leg structure in which the hook portion b of the embedded shaft portion a is long because it is a thin plate PC plate. As shown in FIG. 7, in a mounting anchor for equipment or the like having a thick concrete width, since the length (depth) of the embedded shaft portion a can be made slightly larger, the hooked portion b may have a shorter leg structure. Further, as shown in FIG. 8, in the anchor for the column base of the steel frame column, the one in which the depth of the embedded shaft portion a is set to be long and the tip bent portion b has a curved structure is used. Further, in an anchor for a hybrid concrete curtain wall as shown in FIG. 9, a concrete board (PC
The split structure is adopted to engage the plate side and the steel material frame side. That is, the embedded shaft portion a to be embedded in the concrete plate has a female screw c at the center thereof, and the end of the skirt portion d has a welding structure in which the center of the orthogonal locking pin shaft e is integrally formed, and Bolt body f that is inserted into the screw c from the steel material frame side
The male screw part g is screwed.

[0003]

However, in each of the conventional mounting anchor bolts as described above, the embedded shaft portion a to the exposed mounting portion h has only one bolt shaft structure, and therefore is shown in FIG. When such a wall surface is used, a shearing force is applied to the end of the exposed mounting portion h, which easily causes concrete crushing. Moreover, in the hook-and-fold type (L-type) anchor bolt, it is difficult to set the embedding angle and there is a problem in depth accuracy. Further, in the divided structure type such as the anchor for curtain wall, since welding i of orthogonal members is required,
It is not optimal as an anchor bolt these days because it is cumbersome to manufacture, expensive, and cost is reduced.

In view of the above situation, the present invention is such that an embedded shaft portion embedded in concrete is an assembly type of a shaft body and an embedded pin orthogonal to the shaft body, and a brim portion is provided at an embedded edge portion. Then, it aims at providing the anchor bolt for attachment which solves the said subject.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a male screw shaft portion is provided in an upper portion, an embedded neck collar portion is provided in the middle, and a bolt main body is formed as an embedded shaft portion in a lower portion. A shaft type embedded pin having an insertion locking step portion provided in the central portion is laterally inserted into a pin hole formed at the lower end of the portion, and the embedded pin is engaged at a position opposite to the insertion locking step portion passing through the pin hole. The stopper is formed, and the structure is an inverted T-shaped bolt structure as a whole.

[0006]

With the above-described structure, if a separately formed shaft type embedded pin is laterally inserted into the pin hole provided at the lower end of the bolt main body, which is a single shaft, the intermediate insertion locking step portion comes into contact with the pin. After the positioning is done, if the caulking is formed with an appropriate tool on the embedded pin portion opposite to the insertion locking stepped portion projecting the pin hole and the locking portion is provided, the embedded pin can be easily fixed It becomes a T-shaped bolt body. Also, by locating the collar of the bolt body on the concrete surface during burial, an anchor bolt that can withstand shearing force will be used.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of the embodiments.

The drawing shows an anchor bolt having a caulking structure as a locking means for a shaft-type buried pin, wherein 1 is a male screw shaft portion 2 provided at an upper portion thereof, and an embedded neck collar portion 3 is formed at an intermediate portion thereof, and a lower portion thereof is predetermined. A shaft type bolt main body serving as an embedded shaft portion 4 having a diameter, and a pin hole 5 orthogonal to this axis line is formed in the lower end of the embedded shaft portion 4 of the bolt main body 1, and a shaft type embedded pin separately formed in the pin hole 5. Insert 6 sideways. The embedded pin 6 is formed with an insertion locking step 7 having a flange-shaped structure for positioning at an intermediate portion thereof, and the insertion locking step protruding from the pin hole 5 of the embedded shaft portion 4 of the embedded pin 6. 7 is formed at a position 6a on the side opposite to 7 with a caulking tool (not shown), which is caulked.
In this structure, the embedded pin 6 is fixed at right angles to form an inverted T-shaped mounting anchor bolt 9 that is integrated as a whole.
Reference numeral 10 is a nut that is screwed into the male screw shaft portion 2 of the bolt body 1 that is inserted into and protrudes from the fixing jig A that serves as a steel material frame.

The operation will now be described. First, the inverse T
When forming the mold anchor bolt 9, for example, on the factory side or in the field, a separately formed embedded pin 6 is laterally inserted into the pin hole 5 of the embedded shaft portion 4 of the bolt body 1 that is a single shaft in advance (see FIG. 3). The brim-shaped insertion locking step portion 7 of the embedded pin 6 is brought into contact with the embedded shaft portion 4, and at this time, the pin base portion 6a penetrating the pin hole 5 is caulked with an appropriate tool to form the locking portion 8. The embedded pin 6 is fixed to the bolt body 1 by the locking portion 8 and the insertion locking step portion 7.

Next, in using the reverse T-shaped anchor bolt 9 constructed as described above, for example, the bolt main body is placed on the placing surface C for placing concrete on the form (not shown) forming the concrete plate B. The collar portion 3 in the middle portion of 1 is positioned (set) in parallel. In this case, since the bolt main body 1 has a uniaxial structure, it is easy to set the angle t for the vertical arrangement, and the depth s can be set with high accuracy.

Here, in a building construction process or the like, a male screw shaft portion 2 protruding from the tip of an inverted T-shaped anchor bolt protruding from a wall body which becomes a concrete plate B is attached to a fixing jig A such as a steel frame. The nut 10 is inserted into the fixing jig A and the nut 10 is screwed and fixed to the protruding male screw shaft portion 2 with a washer 11 interposed.

In such an anchor bolt attachment, since the flange portion 3 of the bolt body 1 is arranged in parallel with the wall surface of the concrete plate B, for example, as shown in FIG. Even if a shearing force is applied, the male screw shaft portion 2
Since the brim portion 3 integrated with the compressive force acts on the concrete, the proof stress in the shearing force direction is improved. That is, with respect to the external force in the shearing direction, the yield strength is determined by the bearing strength on the embedded concrete side in addition to the strength of the anchor bolt, but the yield strength in the shearing direction is improved by the effect of the collar portion.

[0013]

As described above, the mounting anchor bolt of the present invention is the reverse of the assembly type in which the shaft type embedded pin having the insertion locking portion is inserted into the pin hole formed in the shaft portion at the lower end of the bolt body. The T-shaped structure makes it lightweight, compact and easy to transport and carry. Moreover, there is no welding process as in the prior art, and there are few cross-section defects due to thread cutting and the like, and there is reliability in strength. Further, the burying work is easy, and the burial position, the burial depth, the burial angle, and the like can be easily secured, because the burial work can be reliably fixed to the mold that improves the positional accuracy. Further, since the collar portion is provided in the middle of the holt body, there are practical effects such as improvement of the proof stress in the shearing direction.

[Brief description of drawings]

FIG. 1 is a side view of an anchor bolt showing an embodiment of the present invention.

FIG. 2 is a perspective view for separating the same.

FIG. 3 is a side view in which an embedded pin is inserted into a bolt body.

FIG. 4 is an explanatory diagram of a usage state of being embedded in a concrete board.

FIG. 5 is an explanatory diagram of a shearing force applied to the anchor bolt.

FIG. 6 is an explanatory diagram of an anchor bolt used for embedding in a conventional PC plate.

FIG. 7 is an explanatory diagram of anchor bolts embedded in the equipment.

FIG. 8 is an explanatory view of an anchor bolt for a column base of the same steel column.

FIG. 9 is an explanatory diagram of the anchor bolt for a concrete type Kate wall.

FIG. 10 is an explanatory diagram of a shearing force applied to the conventional anchor bolt.

[Explanation of symbols]

 1 Bolt main body 2 Male screw shaft part 3 Embedded neck collar part 4 Embedded shaft part 5 Pin hole 6 Shaft type embedded pin 7 Insert locking step part 8 Locking part such as caulking

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroaki Nakagawa Inventor Hiroaki Nakada, No. 19-1 Tobita, Chofu, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Shigeyuki Akihama 1-1, Moto-Akasaka, Minato-ku, Tokyo No. 5 In FRC Co., Ltd. (72) Creator Toshio Tanaka 1-7-9 Motogo, Kawaguchi City, Saitama Prefecture

Claims (1)

[Scope of utility model registration request] 1. A male screw shaft portion is provided on an upper portion, an embedded neck collar portion is provided in the middle, and a bolt main body is formed as an embedded shaft portion at a lower portion, and a pin hole formed at a lower end of the embedded shaft portion. in the shaft-type buried pin provided an insertion locking stepped portion in a central portion laterally inserted, the engagement portion is formed in a position opposite to the insertion engaging step portion which has passed through the pin holes of the embedded pin, as a whole Anchor bolt for mounting that has an inverted T-shaped bolt structure.