JPH0122806Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an anchor used for fixing pillar bases of buildings.

Conventionally, in order to fix a column base of a building or the like to a foundation structure, for example, as shown in FIG. Pass through the bolt hole 5 of the base plate 4 fixed to the lower end and tighten the nut 6 to fix it, and further arrange other anchor materials 7, 7, etc. around the base plate 4, and connect them with a hoop muscle 8. However, a method is adopted in which the exposed upper end and the lower part of the column base are covered with base concrete 9. The reason why such a complicated structure has to be used is because the anchor materials used in the past are made of simple rods.
Due to the lack of reliability with respect to the pull-out force of the anchor materials and the poor construction accuracy for attaching the anchor materials, it was not possible to transmit the stress acting on the steel column base from the anchor materials alone to the foundation concrete. For this reason, as shown in Figure 1, another anchor material 7 is placed around the outer periphery of the base plate 4, the column base is integrated with concrete, and the stress acting on the column base is transferred to the foundation concrete by the anchor material 7. The method was to let him do it. In addition, when shear force is applied to the column base 3, if the conventional method (lateral movement of the column base) as shown in Figure 1 is used, the threaded part of the anchor bolt 2 may be embedded deep into the concrete 1. In most cases, when shear force is applied to this thread,
This part becomes extremely susceptible to breakage and brittle fracture, creating a dangerous situation for the structure. Therefore, construction is troublesome and requires a large amount of construction cost.

The present invention was made to improve the above-mentioned conventional column base mounting structure using anchor bolts, and a plurality of irregularly shaped reinforcing bar anchors are arranged in correspondence with the bolt holes provided in the base plate of the column base, and each irregularly shaped At the upper end of the reinforcing bar anchor, there is a male screw part with a diameter smaller than the main body part, and a considerable shaft part (more than half the thickness of the base plate) is provided continuous to the thread part, and this shaft part is larger than the main body part. By making the diameter small, the attachment plate stops at the boundary between the shaft and the main body, and the body part (deformed reinforcing bar) below the attachment plate is buried in the concrete, ensuring that the shaft does not become buried in the concrete. Furthermore, by restraining the main body of each deformed rebar anchor with hoop reinforcement, the large surface area of the deformed rebar increases the adhesion force between the anchor material and concrete, and each deformed rebar anchor The aim is to increase the shear resistance of the foundation concrete by restraining it with the hoop reinforcement of the anchor, thereby increasing the pull-out resistance as a whole, and to provide an anchor for fixing column bases, etc., which has a simple structure and can be constructed economically. be.

Hereinafter, an embodiment of the anchor of the present invention will be described with reference to FIG. Note that members similar to those of the conventional one shown in FIG. 1 will be described with the same reference numerals.

In FIG. 2, reference numeral 10 denotes an attachment plate on which the base plate 4 of the column base 3 is placed on the foundation concrete 1, and through holes 11, 11 are provided at positions corresponding to the bolt holes 5, 5, . . . provided in the base plate 4, respectively. ...is provided. Reference numeral 12 denotes an anchor material buried in the foundation concrete 1 to fix the column base 3. The anchor material is made of deformed reinforcing bars, and the upper part is connected to the lower part of the tapered part 13 through the tapered part 13 that matches the through hole 11. A shaft portion 17 and a male screw portion 15 having a diameter smaller than that of the main body portion 14 are formed.
Each anchor material 12 is inserted into the through hole 11 and fitted, causing the male threaded portion 15 to protrude above the attachment plate 10, and the nut 6 is screwed into the protruded male threaded portion 15. Further, the main body portions 14 of each anchor material 12 are connected to each other by hoop lines 16, 16, . . . .

The anchor of the present invention is constructed as described above, and when the foundation concrete 1 is placed, the attachment plate 10 is buried so as to be exposed on the upper surface of the foundation concrete 1. To fix the column base 3, remove the nuts 6, fit each bolt hole 5 of the base plate 4 into the male threaded part 15 of each anchor material 12, and insert a washer into the male threaded part 15 protruding upward from the base plate 4. The nut 6 is tightened through the nut 18.

As explained above, the anchor of the present invention uses deformed reinforcing bars as the anchor material, so the adhesion force and frictional force with concrete are extremely large, which significantly increases the pull-out resistance of each anchor material. Since the anchor materials are integrally restrained by the hoop reinforcement, each anchor material synergizes and exerts a more pronounced drag force as a whole.As a result, it is difficult to use conventional anchors for reinforcement. Due to the fact that there is no need for further installations and the pull-out resistance is high, the length of each anchor member can be shortened and the thickness of the foundation concrete can therefore be reduced accordingly. In addition, when burying anchors, each anchor material can be easily positioned using an attached plate, and it also prevents each anchor from moving when the foundation concrete is poured, allowing for highly accurate construction. It has many advantages, such as being able to perform

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a structure for attaching a column pedestal using a conventional anchor, and FIG. 2 is a side sectional view showing a state in which a column pedestal is attached to an anchor according to an embodiment of the present invention. 1...Foundation concrete, 3...Column base, 4...
Base plate, 5...Bolt hole, 6...Nut, 10...Additional plate, 11...Through hole, 12
... Anchor material, 13 ... Tapered part, 14 ...
Main body part, 15...Male thread part, 16...Hoop muscle,
17...Shaft part.

Claims (1)

[Scope of utility model registration request] Insert the upper part of the anchor material made of deformed reinforcing bars, which has a male screw part with a smaller diameter than the main body part and a shaft part, into each through hole of the attachment plate, which corresponds to each bolt hole of the base plate of the column base. An anchor for fixing a column base of a building, etc., characterized in that the upper part of each anchor material is linked together, and the main body of each anchor material is integrally connected by a hoop muscle.