JPS6263733A - Method for fixing anchor to concrete body and anchor apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for fixing an anchor to a concrete frame for supporting newly constructed reinforcing concrete, other FJs, and equipment, and an anchor device therefor. .

(Prior Art) Conventionally, as an anchor for supporting reinforced concrete and other various equipment on a concrete frame, for example, as shown in FIGS. 5 and 6, a tube is attached to the end of an anchor main rod 31. A shaped part 32 is formed, and the circumferential wall of the cylindrical part 32 is divided by longitudinal slits 33 to form expansion pieces 34, and an expansion wedge 35 is fitted to the end of the cylindrical part 32. This is inserted into the anchor hole 37 drilled in the concrete body 36, and the protruding end of the anchor main rod a1 is driven in with a hammer or the like to force the expansion wedge 35 into the cylindrical part 32. The expansion piece 34 is expanded in the anchor hole 37 and the mechanical structure prevents the expansion piece from being pulled out (for example, Japanese Utility Model Publication No. 60-6651).
It has been known.

Conventional anchors that use such a mechanical structure to anchor the anchor in the anchor hole are anchored only by the expanded piece at one end of the anchor main rod, so the resistance to axial tensile loads is small, especially If the diameter of the anchor hole is too large compared to the diameter of the anchor main rod, the resistance force will be even smaller.

In addition to the fixing by the mechanical structure described above, as shown in FIG. 7, an eight-component adhesive 38a of a two-component thermal adhesive is attached to the tip side of the expanding piece 34 into which the expanding wedge 35 is fitted.

38b is isolated and sealed with a capsule 39 attached, and by driving the anchor main rod 31, the h busel 3
For example, Japanese Utility Model Publication No. 55-10655) is known in which the expansion lateral 35 is press-fitted at the same time as the opening 9 is destroyed.

(Problems to be Solved by the Invention) In such conventional fixing methods, the latter method in which an adhesive is used in conjunction with the fixing by the mechanical structure has a problem that the resistance against tensile load in the axial direction is only due to the pressure bonding by the mechanical structure. Although it is superior to , it has the following problems.

(1) It is generally preferable for the adhesive to have a short curing time; however, in that case, it is necessary to implant the expansion piece immediately after embedding the anchor main rod, and time has passed since the capsule is ruptured. Then expansion becomes impossible.

(2) Since the implantation is performed after the capsule is ruptured,
The hardened layer portion of the adhesive that is about to harden will be destroyed by the expansion action of the expansion piece.

(It is difficult to confirm whether the third expansion piece has been expanded reliably.

(4) It is necessary to stir the adhesive after the capsule is broken because of the two-oil mud base, but since this is done using the anchor main rod, it is troublesome to attach the equipment afterwards.

The present invention was made with the aim of solving such problems.

(Means for Solving the Problems) The gist of the present invention for solving the above-mentioned problems is to drill a bottomed anchor hole from the surface of a concrete body using an appropriate drilling means, and insert the bottomed anchor hole into the anchor hole. An anchor main rod having a hollow cylindrical shape and an expansion piece divided by an expansion slit extending in the longitudinal direction at the tip is provided with a tapered expansion opening at the tip opening of the anchor main rod.
11 diameter side end portions are fitted and inserted, the horizontal protruding end portion for expansion is brought into contact with the bottom of the anchor hole, and the anchor main rod is driven in to expand the expansion piece, and then the expansion piece is expanded. A stirring rod is inserted into the anchor main rod to destroy a sliding door liquid mixed adhesive capsule containing a plurality of liquids separated in isolation, which is inserted into the hollow interior of the anchor main rod in advance or after the expansion piece is expanded. A method for fixing an anchor to a concrete framework, characterized by simultaneously mixing and stirring internal replacement fluid and pushing it out into the gap between the anchor main rod and the inner surface of the anchor hole, and having a hollow cylindrical anchor main rod. The anchor main rod is provided with a large diameter part whose inner diameter is increased by a step on the inner surface of the distal end thereof, and is divided by a plurality of slits extending in the longitudinal direction at the side end of the large diameter part of the anchor main rod. The main anchor rod is provided with a plurality of expansion pieces, and has a flange at one end that engages with the step part in the hollow interior of the anchor main rod, and a plurality of liquids are isolated and sealed inside. The narrow diameter 1 of the expansion wedge that accommodates the mixed adhesive capsule and has a tapered shape inside the tip on the large diameter side is 1! I! This invention consists in a concrete sounding body anchor device whose ends are fitted together.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

First, an example of the implementation of the invention of the anchor device used to carry out the method of the invention will be described with reference to FIGS. 1 and 2.

1 in the figure is the anchor main rod. This anchor main rod 1 is, for example, JIS G3101-membrane structure rolled steel or J
It is made of one of the materials of the IS3123 polishing rod set and is formed into a cylindrical shape with a through hole 2 in the center, and a large diameter part 4 with a large inner diameter made by lumping a stepped part 3 is formed on the inner surface of the tip end. .

Further, at the end of the large diameter portion 4 side, an expansion piece 6.6 is formed in sections with slits 5, 5 arranged in opposite directions in the longitudinal direction.

A double-liquid U-glue adhesive capsule 7 is accommodated in the n-through hole 2 of the anchor main rod 1. This capsule 7 is formed into an elongated shape whose outer diameter is smaller than the inner diameter of the through hole 2, and has a 7 flange 8 inserted into the large diameter section 4 at one end and engaged with the stepped section 3.
is integrally molded, and the flange 8 is inserted into the through hole 2 with a large diameter portion 4fJ. A small capsule 7a is enclosed within the capsule 7, and a base agent 9a and a curing agent 9b are enclosed and separated inside and outside the small capsule 7a. Both capsules 7 and 78 are made of a fragile material such as glass. Commercially available adhesives can be used as the capsule 7, and currently commercially available adhesives are broadly classified into polyester adhesives and epoxy adhesives, and any of them can be used.

Further, the 41 diameter side end of the expansion ram 10 is press-fitted into the tip opening of the large diameter portion 4.

This expansion wedge 10 is formed into a tapered shape, and a short shaft portion 9a of equal diameter is formed at the narrow diameter end of the tip, and this shaft portion 10a
is press-fitted into the tip opening of the large diameter portion 4.

On the other hand, a stirring rod 11 is inserted into the through hole 2 of the anchor main rod 1. This stirring rod 11 has a tip 11a pointed at an obtuse angle, a groove 12 is formed around the tip 11a, and the other end can be held by a chuck of an electric drill (not shown).

Next, the anchor fixing method of the present invention using the above-mentioned anchor device will be explained with reference to FIG.

First, as shown in FIG. 3(1), anchor holes 22 are drilled from the surface of the concrete body 20 using a drill 21. This anchor hole 22 is formed to a size such that the anchor main rod 1 described above can be easily inserted therein.

Next, as shown in FIG.
Insert the anchor 1-main rod 1 into which the capsule 7 and the expansion side 10 have been fitted in advance, and insert the hammer 23 into the protruding end of the anchor main rod 1 as shown in the same figure (:3). Set it and drive it in with the hammer 24. By this driving, the expansion wedge 10 is pushed into the large diameter part 4, and the expansion piece 6.6 is expanded in the eastern part of the anchor hole 22, biting into the surrounding hole wall surface, and mechanical expansion is stopped. will be done.

Thereafter, as shown in FIG. 3(4), the driving fitting 23 is removed, the stirring rod 11 is inserted into the through hole 2 of the anchor main rod 1, and the stirring rod 11 is pushed in while rotating with an electric drill. As a result, the capsules 7 and 7b are destroyed, and at the same time, the main agent 9a and hardening agent 9b inside the capsule are mixed and stirred, and further, the anchor main rod 1 and the anchor hole 2 are inserted through the slit 5.5.
The mixed and stirred adhesive 25 is extruded into the gap between the
The gap is filled and fixed with adhesive 25.

As shown in FIG. 3, the tip of the anchor main rod 1 fixed in this way is screwed with a suitable fixing metal fitting 26 to support it.

In addition, although the above-mentioned embodiment shows a case in which the capsule 7 is housed in the anchor main rod 1 in advance, the anchor fixing method of the present invention uses the anchor main rod 1 in which the capsule 7 is not housed in advance. , this is anchor hole 2
2, and after expanding the expansion piece, insert the adhesive capsule without the 7 flange 8 from the protruding end side, and extrude it by breaking, mixing, and stirring with the stirring rod 11 in the same manner as described above. It's also good.

(Test Example) Anchor N was fixed using the anchor device shown in FIGS. 1 and 2 and according to the steps shown in FIG. 3.

When comparing the target anchors No. 004 to 6, which are anchor devices similar to those in No. 1 to No. 3 and which were fixed only by expanding the expansion piece in the anchor hole without using adhesive, the tensile test results were as shown in Table 1. The tensile test load deformation curve was as shown in FIG.

Table 1 (Tensile test results of the present invention and the target anchor) (Effects of the invention) The present invention is constructed as described above, and the expansion of the expansion pieces of the anchor main rod and the mixing and stirring of the adhesive are separate steps. Because this is done, the expansion piece of the anchor main rod is reliably expanded, and the initial anchor holding force is applied just by tapping the anchor body, making it easy to work in the ceiling direction.

Furthermore, the adhesive is poured after the anchor body is expanded.6: Stable adhesive fixation can be obtained without destroying the cured layer of the adhesive, and the adhesive is filled in the areas where tensile load is most applied. This ensures reliable strength. Also, by marking the core or measuring its protrusion, there are various effects such as being able to check the construction status when driving the anchor body.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the anchoring device of the present invention, Fig. 2 is a longitudinal cross-sectional view of the same, Fig. 3 is a longitudinal cross-sectional view showing the steps of an example of the anchor fixing method of the present invention, and Fig. 4 is a test A graph showing the results of an example, FIG. 5 shows the hardness of an example of a conventional anchor device.
FIG. 6 is a longitudinal sectional view showing the state before I, FIG. 6 is a longitudinal sectional view showing the fixed state, and FIG. 7 is a longitudinal sectional view showing another conventional anchor device. 1...Anchor main rod, 2...Through hole,
3...-Stepped portion, 4...Large diameter portion, 5...
...slit, 6...expansion piece, 7...
・Capsule, 8...7 Lunge, 10...
- Expansion wedge, 11... Stirring rod, 20...
・Concrete frame, 22... Anchor hole, 2
3... Drive fitting, 24... Hammer,
25...Adhesive. Patent application: Hon Drive India Co., Ltd. Patent attorney Sasaki
゛□Figure 3Figure 5Figure 7

Claims (2)

[Claims] (1) A bottomed anchor hole is drilled from the surface of the concrete body using an appropriate drilling method, and the anchor hole has a hollow cylindrical shape and is divided into expansion slits with expansion slits oriented in the longitudinal direction at the tip. Insert the anchor main rod having an opening into the distal end opening of the anchor main rod by fitting the small diameter end of the tapered expansion wedge into the opening, and insert the protruding end of the expansion wedge into the opening of the anchor rod. Driving the anchor main rod into contact with the bottom of the anchor hole to expand the expansion piece, and then isolating the plurality of liquid agents inserted into the hollow interior of the anchor main rod in advance or after the expansion piece is expanded. Insert a stirring rod into the anchor main rod to destroy the double liquid mixed adhesive capsule contained therein, and at the same time mix and stir the double liquid inside and push it out into the gap between the anchor main rod and the inner surface of the anchor hole. A method of anchoring to a concrete frame, which is characterized by the following: (2) It has a hollow cylindrical anchor main rod, and the inner surface of the tip of the anchor main rod has a large diameter part whose inner diameter is increased with a step as a boundary, and the side end of the large diameter part of the anchor main rod The main anchor rod has a plurality of expansion pieces divided by a plurality of slits extending in the longitudinal direction, and has a flange at one end that engages with the stepped portion in the hollow interior of the anchor main rod, and isolates a plurality of liquids therein. 2. A concrete frame anchor device, which accommodates a capsule of a double-liquid mixed adhesive sealed therein, and in which a narrow diameter end of a tapered expansion wedge is fitted into the large diameter end.